CN112713046B - Buffer device, operating mechanism and extremely fast on-off high-voltage switch - Google Patents
Buffer device, operating mechanism and extremely fast on-off high-voltage switch Download PDFInfo
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- CN112713046B CN112713046B CN202011444169.8A CN202011444169A CN112713046B CN 112713046 B CN112713046 B CN 112713046B CN 202011444169 A CN202011444169 A CN 202011444169A CN 112713046 B CN112713046 B CN 112713046B
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- 239000000872 buffer Substances 0.000 title claims abstract description 96
- 230000007246 mechanism Effects 0.000 title claims abstract description 66
- 230000005540 biological transmission Effects 0.000 claims abstract description 187
- 239000004020 conductor Substances 0.000 claims abstract description 141
- 230000033001 locomotion Effects 0.000 claims abstract description 59
- 230000006698 induction Effects 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 14
- 230000000903 blocking effect Effects 0.000 claims abstract description 7
- 238000013016 damping Methods 0.000 claims description 28
- 238000009434 installation Methods 0.000 abstract description 13
- 230000000875 corresponding effect Effects 0.000 description 37
- 230000009286 beneficial effect Effects 0.000 description 21
- 230000006872 improvement Effects 0.000 description 21
- 230000000694 effects Effects 0.000 description 13
- 230000003139 buffering effect Effects 0.000 description 10
- 230000009471 action Effects 0.000 description 4
- 239000006173 Good's buffer Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000002596 correlated effect Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000005577 local transmission Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/42—Driving mechanisms
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to a buffer device, an operating mechanism and a high-speed on-off high-voltage switch, wherein the buffer device comprises: a connecting member; the conductor unit is arranged corresponding to the magnetic field generating unit so that when the magnetic field generating unit and the conductor unit move relatively, the conductor unit performs magnetic induction line cutting movement in a magnetic field generated by the corresponding magnetic field generating unit; when the transmission element drives the connecting piece to move in a set stroke, the conductor unit generates eddy current when cutting the magnetic induction line, and the corresponding conductor unit and the magnetic field generating unit are matched to form an eddy current braking structure which is used for blocking the relative movement of the transmission element and the fixed part and realizing the buffer braking in the opening and/or closing process. The eddy current braking structure formed by matching the magnetic field generating unit and the conductor unit realizes buffer braking on the transmission element, has simple composition structure and strong adaptability, can be arranged corresponding to each transmission element according to actual needs, and is not limited in installation position.
Description
Technical Field
The invention belongs to the technical field of high-voltage switches, and particularly relates to a buffer device, an operating mechanism and an extremely-fast on-off high-voltage switch.
Background
The high-voltage switch capable of being switched on and off at the extreme speed requires the arc extinguish chamber to complete the switching-off process within 10ms so as to extinguish the electric arc, and in order to realize the high-voltage switch capable of being switched on and off at the extreme speed, the average speed of a transmission rod in the operating mechanism can reach 30m/s, the acceleration in the process is even up to 3000m/s, and the operating mechanism needs to have better impact resistance and higher mechanical reliability.
At present, a buffer device, such as a hydraulic buffer device or a spring buffer device, is arranged in an operating mechanism, the hydraulic buffer device comprises a stepped piston and a buffer sleeve, the stepped piston extrudes hydraulic oil when moving, and the hydraulic oil generates movement resistance to the stepped piston, so as to achieve a buffer effect; the spring buffer device uses a spring to buffer the operating mechanism. However, these buffer devices are limited in their installation positions due to their own structures, and often can be installed close to the power output device of the operating mechanism, however, the transmission structure between the power output device and the moving contact is also subjected to a large load force in the process of extremely fast switching on and off, and the movement speed is high, and the long rod, the transmission joint and other structures in the transmission structure are relatively weak in strength or the transmission element subjected to a large load force in the transmission process is easily damaged due to overload, so that the mechanical life of the switch is shortened.
Disclosure of Invention
The invention aims to provide a buffer device which can solve the technical problem that a transmission element between a power output device and a switch fracture is overloaded and easily damaged because the conventional buffer device is limited in arrangement position due to structural characteristics and is generally arranged next to the power output device of an operating mechanism. Meanwhile, the invention aims to provide an operating mechanism and a high-speed on-off high-voltage switch using the buffer device.
The buffer device adopts the following technical scheme: a cushioning device, comprising:
the connecting piece is fixedly connected to a corresponding transmission element, and the transmission element is a transmission component in a transmission system on the operating mechanism for outputting the opening and closing driving force or a transmission component in a transmission chain formed by a power output part of the operating mechanism to a power input part of the switch body in the high-voltage switch;
the magnetic field generating unit is one or more than two magnetic field generating units, the magnetic field generating units are coil units or permanent magnets, and the coil units can generate a magnetic field when being electrified;
one or more than two conductor units which are arranged in one-to-one correspondence with the magnetic field generating units so that when the magnetic field generating units and the conductor units move relatively, the conductor units do cutting magnetic induction line movement in the magnetic field generated by the corresponding magnetic field generating units;
one of the magnetic field generating unit and the conductor unit is fixedly arranged on the connecting piece, and the other one of the magnetic field generating unit and the conductor unit is fixedly connected with the operating mechanism or the fixed part of the high-voltage switch;
when the transmission element drives the connecting piece to move in a set stroke, the conductor unit generates eddy current when cutting the magnetic induction line, and the corresponding conductor unit and the magnetic field generating unit are matched to form an eddy current braking structure which is used for blocking the relative movement of the transmission element and the fixed part and realizing the buffer braking in the opening and/or closing process.
The beneficial effects are that: in the buffer device, the eddy current braking structure formed by matching the magnetic field generating unit and the conductor unit is used for realizing buffer braking on the transmission element, the composition structure is simple, the adaptability is strong, the eddy current braking structure can be arranged corresponding to each transmission element according to actual requirements, the installation position is not limited, a good buffer effect can be realized, braking can be provided, and the effect of protecting the transmission element can be realized.
As a further improvement, the connecting piece comprises a fixing sleeve or a hoop which is used for being fixedly connected with the transmission element which performs linear motion.
The beneficial effects are that: the fixing sleeve or the hoop can be well adapted to the external shape of the transmission element performing linear motion, and is convenient to mount and fix with the transmission element.
As a further improvement, when the magnetic field generating units are fixedly arranged on the connecting piece, the connecting piece is provided with mounting seats, the mounting seats are side plate structures extending out in the radial direction of the connecting piece, the number of the mounting seats is equal to that of the magnetic field generating units, and each mounting seat is provided with one magnetic field generating unit.
The beneficial effects are that: the side plate structure extending out is arranged on the mounting seat of the connecting piece and used for fixing the magnetic field generating unit, so that a mounting space is better provided, and the mounting is convenient.
As a further improvement, the number of the installation seats is more than two, and the installation seats are uniformly arranged in the circumferential direction of the transmission element.
The beneficial effects are that: the mounting seat more than two can make the transmission element receive bigger cushioning effect, and the mounting seat in the even arrangement of transmission element circumference, makes the cushioning effect that the transmission element received comparatively even, is favorable to transmission element stress balance.
As a further improvement, the conductor unit includes an elongated conductor.
As a further improvement, the length of the elongated conductor is not less than the stroke of the relative movement of the magnetic field generating unit and the conductor unit.
The beneficial effects are that: for providing sufficient eddy current braking performance.
As a further improvement, the elongated conductor is in a U-shaped groove structure, and the corresponding magnetic field generation unit is positioned in the U-shaped groove structure and is spaced from the U-shaped groove structure.
The beneficial effects are that: the strip-shaped conductor of the U-shaped groove structure is matched with the magnetic field generating unit in the groove at intervals, so that the number of the magnetic induction lines penetrating into and out of the conductor can be increased, the eddy current generated by the conductor is increased, and the transmission element is better buffered.
As a further improvement, the magnetic field generating unit comprises at least two coil units or permanent magnets, and all the coil units or the permanent magnet units belonging to the same magnetic field generating unit are sequentially distributed at intervals along the extending direction of the elongated conductor.
The beneficial effects are that: the magnetic field generating unit comprises more than two coil units or permanent magnets, and the coil units and the permanent magnets with proper sizes are conveniently selected to form the magnetic field generating unit.
The operating mechanism adopts the following technical scheme: an operation structure comprises a power source, a transmission part and a power output part;
the power source drives the power output part to reciprocate through the transmission part;
the power output part is used for being in transmission connection with the power input part of the switch body of the corresponding high-voltage switch, and the transmission part and the power output part form a power train of the operating mechanism; one or more than two transmission components in the power train are transmission elements, and a buffer device is configured corresponding to the transmission elements and comprises:
the connecting pieces are fixedly connected to the corresponding transmission elements;
the magnetic field generating unit is one or more than two magnetic field generating units, the magnetic field generating units are coil units or permanent magnets, and the coil units can generate a magnetic field when being electrified;
one or more than two conductor units which are arranged in one-to-one correspondence with the magnetic field generating units so that when the magnetic field generating units and the conductor units move relatively, the conductor units do cutting magnetic induction line movement in the magnetic field generated by the corresponding magnetic field generating units;
one of the magnetic field generating unit and the conductor unit is fixedly arranged on the connecting piece, and the other one of the magnetic field generating unit and the conductor unit is fixedly connected with the fixed part of the operating mechanism;
when the transmission element drives the connecting piece to move in a set stroke, the conductor unit generates eddy current when cutting the magnetic induction line, and the corresponding conductor unit and the magnetic field generating unit are matched to form an eddy current braking structure which is used for blocking the relative movement of the transmission element and the fixed part and realizing the buffer braking in the opening and/or closing process.
The beneficial effects are that: in the operating mechanism, the buffer device is arranged corresponding to the transmission element in the transmission system, and in the buffer device, the eddy current braking structure formed by matching the magnetic field generating unit and the conductor unit is utilized to realize buffer braking on the transmission element, so that the operating mechanism has a simple composition structure and strong adaptability, can be arranged corresponding to each transmission element according to actual requirements, is not limited in installation position, can play a good buffer role, can provide braking, and also plays a role in protecting the transmission element.
As a further improvement, the connecting piece comprises a fixing sleeve or a hoop which is used for being fixedly connected with the transmission element which performs linear motion.
The beneficial effects are that: the fixing sleeve or the hoop can be well adapted to the external shape of the transmission element performing linear motion, and is convenient to mount and fix with the transmission element.
As a further improvement, when the magnetic field generating units are fixedly arranged on the connecting piece, the connecting piece is provided with mounting seats, the mounting seats are side plate structures extending out in the radial direction of the connecting piece, the number of the mounting seats is equal to that of the magnetic field generating units, and each mounting seat is provided with one magnetic field generating unit.
The beneficial effects are that: the side plate structure extending out is arranged on the mounting seat of the connecting piece and used for fixing the magnetic field generating unit, so that a mounting space is better provided, and the mounting is convenient.
As a further improvement, the number of the installation seats is more than two, and the installation seats are uniformly arranged in the circumferential direction of the transmission element.
The beneficial effects are that: the mounting seat more than two can make the transmission element receive bigger cushioning effect, and the mounting seat in the even arrangement of transmission element circumference, makes the cushioning effect that the transmission element received comparatively even, is favorable to transmission element stress balance.
As a further improvement, the conductor unit includes an elongated conductor.
As a further improvement, the length of the elongated conductor is not less than the stroke of the relative movement of the magnetic field generating unit and the conductor unit.
The beneficial effects are that: for providing sufficient eddy current braking performance.
As a further improvement, the elongated conductor is in a U-shaped groove structure, and the corresponding magnetic field generating unit is located in the U-shaped groove structure and spaced from the U-shaped groove structure.
The beneficial effects are that: the strip-shaped conductor of the U-shaped groove structure is matched with the magnetic field generating unit in the groove at intervals, so that the number of the magnetic induction lines penetrating into and out of the conductor can be increased, the eddy current generated by the conductor is increased, and the transmission element is better buffered.
As a further improvement, the magnetic field generating unit comprises at least two coil units or permanent magnets, and all the coil units or the permanent magnet units belonging to the same magnetic field generating unit are sequentially distributed at intervals along the extending direction of the elongated conductor.
The beneficial effects are that: the magnetic field generating unit comprises more than two coil units or permanent magnets, and the coil units and the permanent magnets with proper sizes are conveniently selected to form the magnetic field generating unit.
The invention discloses a high-speed on-off high-voltage switch, which adopts the following technical scheme: an ultra-fast opening high voltage switch comprising:
a switch body having a power input portion;
the operating mechanism is provided with a power output part, and the power output part is in transmission connection with the power input part through an intermediate transmission mechanism so as to form a transmission chain;
one or more than two transmission parts on the transmission chain are transmission elements, and a buffer device is configured corresponding to the transmission elements and comprises:
the connecting pieces are fixedly connected to the corresponding transmission elements;
the magnetic field generating unit is one or more than two magnetic field generating units, the magnetic field generating units are coil units or permanent magnets, and the coil units can generate a magnetic field when being electrified;
one or more than two conductor units which are arranged in one-to-one correspondence with the magnetic field generating units so that when the magnetic field generating units and the conductor units move relatively, the conductor units do cutting magnetic induction line movement in the magnetic field generated by the corresponding magnetic field generating units;
one of the magnetic field generating unit and the conductor unit is fixedly arranged on the connecting piece, and the other one of the magnetic field generating unit and the conductor unit is fixedly connected with the fixed part of the high-voltage switch which is switched on and off at the highest speed;
when the transmission element drives the connecting piece to move in a set stroke, the conductor unit generates eddy current when cutting the magnetic induction line, and the corresponding conductor unit and the magnetic field generating unit are matched to form an eddy current braking structure which is used for blocking the relative movement of the transmission element and the fixed part and realizing the buffer braking in the opening and/or closing process.
The beneficial effects are that: in the high-voltage switch with the ultra-fast on-off function, the buffer device is arranged corresponding to the transmission element, and the eddy current braking structure formed by matching the magnetic field generating unit and the conductor unit is utilized to realize buffer braking on the transmission element, so that the switch is simple in composition structure and high in adaptability, can be arranged corresponding to each transmission element according to actual needs, is not limited in installation position, can play a good role in buffering, can provide braking, and also plays a role in protecting the transmission element.
As a further improvement, the connecting piece comprises a fixing sleeve or a hoop which is used for being fixedly connected with the transmission element which performs linear motion.
The beneficial effects are that: the fixing sleeve or the hoop can be well adapted to the external shape of the transmission element performing linear motion, and the fixing sleeve or the hoop is convenient to mount and fix with the transmission element.
As a further improvement, when the magnetic field generating units are fixedly arranged on the connecting piece, the connecting piece is provided with mounting seats, the mounting seats are side plate structures extending out in the radial direction of the connecting piece, the number of the mounting seats is equal to that of the magnetic field generating units, and each mounting seat is provided with one magnetic field generating unit.
The beneficial effects are that: the side plate structure extending out is arranged on the mounting seat of the connecting piece and used for fixing the magnetic field generating unit, so that a mounting space is better provided, and the mounting is convenient.
As a further improvement, the number of the installation seats is more than two, and the installation seats are uniformly arranged in the circumferential direction of the transmission element.
The beneficial effects are that: the mount pad more than two can make the drive element receive bigger cushioning effect, and the mount pad is in the even arrangement of drive element circumference, and the cushioning effect that makes the drive element receive is comparatively even, is favorable to drive element stress balance.
As a further improvement, the conductor unit includes an elongated conductor.
As a further improvement, the length of the elongated conductor is not less than the stroke of the relative movement of the magnetic field generating unit and the conductor unit.
The beneficial effects are that: for providing sufficient eddy current braking performance.
As a further improvement, the elongated conductor is in a U-shaped groove structure, and the corresponding magnetic field generation unit is positioned in the U-shaped groove structure and is spaced from the U-shaped groove structure.
The beneficial effects are that: the strip-shaped conductor of the U-shaped groove structure is matched with the magnetic field generating unit in the groove at intervals, so that the number of the magnetic induction lines penetrating into and out of the conductor can be increased, the eddy current generated by the conductor is increased, and the transmission element is better buffered.
As a further improvement, the magnetic field generating unit comprises at least two coil units or permanent magnets, and all the coil units or the permanent magnet units belonging to the same magnetic field generating unit are sequentially distributed at intervals along the extending direction of the elongated conductor.
The beneficial effects are that: the magnetic field generating unit comprises more than two coil units or permanent magnets, and the coil units and the permanent magnets with proper sizes are conveniently selected to form the magnetic field generating unit.
Drawings
FIG. 1 is a schematic structural view of a damping device of the present invention applied to an arc-extinguishing chamber;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is an enlarged view taken at A in FIG. 2;
fig. 4 is an assembly view of the fixing sleeve, the mounting seat and the magnetic field generating unit in fig. 1;
fig. 5 is a schematic structural diagram of the high-voltage switch capable of being switched on and off at a high speed according to the present invention.
Description of reference numerals:
1. a switch body; 2. a frame body; 3. an operating mechanism; 4. a power output section; 5. a first buffer device; 6. a transmission crank arm; 7. a second buffer device; 8. a transmission connecting rod; 9. a direct-acting transmission rod; 10. a third buffer device; 11. an arc extinguishing chamber; 12. a strip conductor; 13. fixing a sleeve; 14. a side panel structure; 15. a magnetic field generation unit; 16. a fixing plate; 17. a power input section; 18. and locking the bolt.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, elements recited by the phrase "comprising an … …" do not exclude the inclusion of such elements in processes or methods.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meanings of the above-mentioned terms in the present invention can be understood by those skilled in the art through specific situations.
The present invention will be described in further detail with reference to examples.
the buffer device mainly comprises a magnetic field generating unit 15 and a conductor unit which are correspondingly arranged, so that when the magnetic field generating unit 15 generates relative motion, the conductor unit cuts magnetic induction lines in a magnetic field generated by the corresponding magnetic field generating unit 15, and further eddy current can be formed in the conductor unit. When one of the magnetic field generating unit 15 and the single unit is fixedly mounted on a certain transmission element of the operating mechanism 3 or the high-voltage switch and the other is fixed on a fixed part of the operating mechanism 3 or the high-voltage switch, when the magnetic field generating unit 15 and the conductor unit move relatively, the conductor unit generates eddy current when cutting magnetic induction lines, and the corresponding conductor unit and the magnetic field generating unit 15 cooperate to form an eddy current braking structure for blocking the relative movement of the transmission element and the fixed part and realizing buffer braking in the opening and/or closing process. The whole buffer device is only provided with the magnetic field generating unit 15 and the conductor unit, so that the required volume is small, the buffer device can be conveniently arranged at different positions according to the transmission requirement, and a plurality of buffer devices can be arranged aiming at the transmission system of the operating mechanism 3 or the whole transmission chain of the high-voltage switch, so that the effective braking can be realized by the sum of the braking force provided by the buffer devices, the requirement on the braking force of a single buffer device is reduced, the problem of overload of a local transmission element can not be caused, and the local transmission element is effectively protected.
The structure of the buffer device is shown in fig. 1 to 4, and comprises a magnetic field generating unit 15 and a conductor unit which are used in cooperation, wherein the magnetic field generating unit 15 is fixedly arranged on a connecting piece, the connecting piece is fixedly arranged on a linear motion transmission rod 9 serving as a transmission element, and the conductor unit is fixedly arranged on an arc extinguish chamber 11 of a high-voltage switch.
It should be noted that the direct-acting transmission rod 9 serving as the transmission element is an insulating rod extending into the arc extinguish chamber 11, an inner end of the insulating rod is in transmission connection with the moving contact, an outer end of the insulating rod is in transmission connection with the power output part 4 of the corresponding operating mechanism 3 through an intermediate transmission mechanism, and the operating mechanism 3 drives the moving contact to reciprocate through the direct-acting transmission rod 9, so that the arc extinguish chamber 11 is switched on and off.
In fig. 1, a damping device is arranged in correspondence to the linear motion transmission rod 9, which can directly provide a damping braking force to the linear motion transmission rod 9.
Specifically, the damping device in this embodiment includes a connecting member, the connecting member is a fixing sleeve 13, a locking bolt 18 is spirally assembled on the fixing sleeve 13, and after the fixing sleeve 13 is sleeved on the linear motion transmission rod 9 serving as a transmission element, the fixing sleeve 13 and the linear motion transmission rod 9 can be fixedly assembled together by screwing the locking bolt 18.
The magnetic field generating device is characterized in that the fixed sleeve 13 is provided with two side plate structures 14 which are symmetrically arranged, the two side plate structures 14 are uniformly distributed at intervals along the circumferential direction of the fixed sleeve 13, the side plate structures 14 serve as mounting bases and are used for fixedly mounting the magnetic field generating units 15, the side plate structures 14 extend along the radial direction of the fixed sleeve 13, the tail end of each side plate structure 14 is respectively provided with one magnetic field generating unit 15, the magnetic field generating units 15 at the positions specifically comprise three coil units which are sequentially arranged at intervals, and a magnetic field can be generated after the coil units are electrified.
For the two magnetic field generating units 15, two conductor units are fixed to the arc-extinguishing chamber 11 as a fixed part of the high-voltage switch, each conductor unit including an elongated conductor 12, the elongated conductor 12 being fixedly mounted on a side surface of the arc-extinguishing chamber 11 by a fixing plate 16, the elongated conductor 12 being made of a highly conductive material, such as a copper conductor. And the strip conductor 12 and the direct-acting transmission rod 9 are arranged in parallel and are arranged corresponding to the magnetic field generating unit 15 which moves back and forth, wherein the strip conductor 12 is a U-shaped groove structure, and the corresponding magnetic field generating unit 15 is arranged in the U-shaped groove structure and is spaced from the U-shaped groove structure, so that the friction obstacle is avoided. Thus, the two conductor units correspond to the two magnetic field generating units 15 in a one-to-one correspondence, and when the magnetic field generating units 15 and the conductor units move relatively, the conductor units perform magnetic induction line cutting movement in the magnetic field generated by the corresponding magnetic field generating units 15.
When the direct-acting transmission part drives the fixed sleeve 13 to move within a set stroke, the conductor unit generates eddy current when cutting the magnetic induction line, and the corresponding conductor unit and the magnetic field generating unit 15 are matched to form an eddy current braking structure for blocking the relative movement of the direct-acting transmission rod 9 and the arc extinguish chamber 11, so that the buffer braking in the brake opening and closing process is realized.
To ensure sufficient braking force, the length of the elongated conductor 12 is not less than the stroke of the relative movement of the magnetic field generating unit 15 and the conductor unit.
In the buffering device provided by this embodiment, a magnetic field is generated after the coil unit is powered on, and when the linear motion transmission rod 9 drives the powered coil unit to move, the strip-shaped conductor 12 completes the relative operation of cutting the magnetic induction lines, so that eddy current is generated on the strip-shaped conductor 12 due to electromagnetic induction, the eddy current forms an induction magnetic field which hinders the change of the magnetic field, and further hinders the movement of the magnetic field generation unit 15, so that resistance is applied to the linear motion transmission rod 9 serving as a transmission element, and the buffering brake of the linear motion transmission rod 9 is realized.
Generally, the coil unit generates a magnetic field after being electrified, so that in order to avoid increasing the operating resistance and optimize the braking effect, for a high-voltage switch, the high-voltage switch can be electrified at the final stage of closing and the final stage of opening to start eddy current braking.
However, in the eddy current braking structure formed by the conductor unit and the magnetic field generating unit 15, the generated braking resistance is not only positively correlated with the magnitude of the magnetic field formed by the magnetic field generating unit itself, but also positively correlated with the speed of the linear motion transmission rod 9 as the transmission element, and thus, in the high-voltage switch, since the initial speed of the opening operation and the closing operation is small, even if the eddy current braking effect by the energization of the coil unit is weak at this time, the coil unit can be always in the energized state in consideration of the simplification of the control. Certainly, the method has certain disadvantages, and the on-off operation function is easy to be additionally added.
The buffer device realizes buffer braking by utilizing the eddy current braking structure formed by the matching of the magnetic field generating unit and the conductor unit, has simple structure and strong structural adaptability, is not limited in installation position, can be arranged at the position of a transmission element with weak structural strength or easy damage caused by overload according to actual use requirements, and plays a good buffer role to protect the transmission element.
The buffer device is reliable in buffering and convenient to adjust, and the size of the magnetic field can be changed through the power-on quantity of the coil, so that the buffering effect of the buffer device can be adjusted; the coil is electrified to supply energy to the buffer device, and even if the buffer device is used for a long time, the buffer effect of the buffer device is not easy to lose efficacy or weaken.
it differs from example 1 mainly in that: in embodiment 1, the magnetic field generating unit is a coil unit, and the magnetic field is generated only after power is applied, which requires the wiring to be considered during the arrangement, and is not suitable for application in some occasions. In this embodiment, the permanent magnet may be used as the magnetic field generating unit, the permanent magnet is fixedly mounted at the end of the side plate structure, and the permanent magnet and the inner wall of the slot of the elongated conductor form an interval, so that when the linear motion transmission rod drives the permanent magnet to move, the elongated conductor makes a relative motion of cutting the magnetic field lines, and an eddy current braking structure may also be formed, thereby realizing the buffer braking of the linear motion transmission rod.
it differs from example 1 mainly in that: in the embodiment 1, the connecting piece adopts a fixing sleeve, and a locking bolt needs to be additionally arranged to realize the fixing. In this embodiment, the connecting member is a hoop, and two separate bodies of the hoop are fixed to the direct-acting transmission rod in a folding manner and connected into a whole through a bolt.
it differs from example 1 mainly in that: in embodiment 1, a side plate structure is employed as a mounting base, and a magnetic field generating unit is provided at the end thereof extending away from the linear motion transmission rod. In this embodiment, the fixing sleeve is not provided with a mounting seat, and a group of coils are directly wound and fixed on the circumferential surface of the fixing sleeve, at this time, the matched conductor unit is of a cylindrical structure, one end of the cylindrical structure is fixedly installed at one end of the arc extinguish chamber shell, the axis of the cylindrical structure coincides with the axis of the linear motion transmission rod, the linear motion transmission rod and the coils are located inside the cylindrical structure, a gap is reserved between the coils and the cylindrical structure, and the coils move in the cylindrical structure along with the linear motion transmission rod.
Embodiment 5 of the buffer device of the present invention:
it differs from example 1 mainly in that: in embodiment 1, the fixing sleeve is provided with two mounting seats corresponding to the two mounting seats, and two strip conductors are arranged in one-to-one correspondence. In this embodiment, only one mounting seat is provided on the connecting member, and only one conductor unit is provided in the buffer device.
it differs from example 1 mainly in that: in embodiment 1, the magnetic field generating unit is in the groove of the elongated conductor, and the braking effect is good. In this embodiment, the magnetic field generating unit may be located outside the elongated conductor as long as a sufficient eddy current braking force is generated when the magnetic field sound field unit moves relative to the conductor.
unlike embodiment 1, the length of the conductor is longer than the stroke of the relative movement between the conductor and the corresponding coil, so that the corresponding coil is prevented from being separated from the conductor in the length direction of the conductor.
it differs from example 1 mainly in that: in embodiment 1, two mounting seats are uniformly distributed on the fixing sleeve in the circumferential direction. In this embodiment, the fixed sleeve is provided with four mounting seats, the four mounting seats are uniformly arranged in the circumferential direction of the direct-acting transmission rod so as to enable the direct-acting transmission rod to be stressed evenly, each mounting seat is provided with a group of coils, each group of coils is composed of five coils, and the arc extinguish chamber shell is fixedly provided with four groups of conductors which are matched with the four groups of mounting seats.
it differs from example 1 mainly in that: in embodiment 1, the magnetic field generating unit is fixed to a linear actuator as a driving element, and the conductor unit is fixed to an arc extinguishing chamber as a fixed part of the high-voltage switch. In this embodiment, the conductor unit is fixedly connected to the transmission element and can move with the transmission element, and the magnetic field generating unit is fixed to the fixed portion of the high-voltage switch.
Specifically, an insulating support can be mounted at one end of the arc extinguish chamber shell, the insulating support is in a long strip shape, the length extending direction of the insulating support is parallel to the axis of the linear motion transmission rod, the insulating support is wound with a coil as a magnetic field generating unit along the length direction, a cylindrical conductor is mounted on the linear motion transmission rod, the cylindrical conductor is sleeved on the linear motion transmission rod and can move along with the linear motion transmission rod, and the length of the insulating support is larger than the stroke of the cylindrical conductor moving along with the linear motion transmission rod. When the linear motion transmission rod moves, the tubular conductor is driven to move, when the tubular conductor moves to the stroke end (the initial position where the buffering action is required) of the opening and closing movement, the coil is electrified to generate a magnetic field, the tubular conductor moves in the magnetic field to cut a magnetic induction line, and the Lorentz force applied to the tubular conductor hinders the linear motion transmission rod to move.
Of course, the coil on the insulating support may be replaced by a permanent magnet, and a magnetic field may be formed in the same manner, so that the magnetic induction cutting motion is realized when the cylindrical conductor as the conductor unit moves.
it differs from example 1 mainly in that: in embodiment 1, the transmission element is a linear motion transmission rod, the corresponding magnetic field generating unit is also linearly reciprocated, and the corresponding conductor unit is also a long-strip conductor. In this embodiment, the transmission element is a rotating element, for example, the transmission element may correspond to a transmission crank arm on a high-voltage switch transmission chain, a swing arm is coaxially and fixedly disposed corresponding to the transmission crank arm, the swing arm serves as the transmission element, when the transmission crank arm transmits a driving force, the swing arm swings reciprocally together, when a buffer device is disposed for the transmission crank arm, a magnetic field generating unit may be disposed on the swing arm, at this time, a moving track of the magnetic field generating unit is an arc shape, and a conductor unit disposed correspondingly may also be designed into an arc shape so as to correspond to a track of the magnetic field generating unit.
It should be noted that, if the magnetic field generating unit employs a coil unit, a power line needs to be arranged, and the power line needs to be arranged in the high-voltage switch according to the installation position of the buffer device.
The embodiment of the high-voltage switch capable of being switched off at the highest speed comprises the following steps:
as shown in fig. 5, the high voltage switch includes a switch body 1, the switch body 1 is fixedly installed on a frame body 2, the frame body 2 is also provided with an operating mechanism 3, the operating mechanism 3 comprises a power source, a transmission part and a power output part 4, the power source drives the power output part 4 to reciprocate through the transmission part, the transmission part and the power output part 4 form a power system of the operating mechanism 3, an intermediate transmission mechanism is arranged between the power output part 4 of the operating mechanism 3 and a power input part 17 of the switch body 1, in the present embodiment, the power output portion 4 of the operating mechanism 3 and the power input portion 17 of the switch body 1 are both straight bars and perform reciprocating straight movement, and the transmission connecting lever 6 serving as a transmission component of the intermediate transmission mechanism is in transmission connection with the power input portion 17 through the transmission connecting rod 8.
In this embodiment, the first buffer device 5 is provided for the power output portion 4 of the operating mechanism 3, the second buffer device 10 is provided for the power input portion 17 of the switch body 1, the third buffer device is provided for one transmission connecting lever 6 of the intermediate transmission mechanism, and the transmission connecting lever 6 passes through the transmission link.
The first buffer device 5 and the second buffer device 10 have substantially the same structure, and as described in the first buffer device as an example, the first buffer device 5 has substantially the same structure as the buffer device in embodiment 5, and includes a conductor unit and a magnetic field generating unit, the conductor unit is the elongated conductor structure in embodiment 1, and the magnetic field generating unit can be permanent magnets arranged in U-shaped grooves of the elongated conductor at intervals.
At this time, the conductor unit is fixedly installed on the fixed part of the operating mechanism 3, the magnetic field generating unit is fixedly installed on the power output part 4 of the operating mechanism 3 through a connecting piece, so that the relative movement of the magnetic field generating unit and the conductor unit is ensured, the conductor unit is ensured to generate eddy current when cutting the magnetic induction line, the corresponding conductor unit and the magnetic field generating unit are matched to form an eddy current braking structure, and the buffer braking in the brake opening and closing process is realized through the telescopic action of the power output part 4 of the operating mechanism 3.
The first damping device 5 and the second damping device 10 differ only in that: the conductor unit in the second damping device 10 is fixedly mounted on the switch body 1, while the magnetic field generating unit is fixedly mounted on the fixed part of the switch body.
For the second buffer device 7, it is arranged opposite to the transmission crank arm 6, and is used to apply a buffer brake to the transmission crank arm, and the specific structure can refer to the buffer device in the specific embodiment 10 of the buffer device, similarly, a swing arm is coaxially and fixedly arranged on the transmission crank arm 6, a magnetic field generating unit is fixedly arranged at a free end of the swing arm, and a circular arc-shaped conductor unit is fixed on the frame body 2 to correspond to the circular arc-shaped track of the magnetic field generating unit, and an eddy current brake structure formed by matching the circular arc-shaped conductor unit and the magnetic field generating unit is utilized to form an effective buffer brake to the transmission crank arm 6, of course, the magnetic field generating unit here can adopt a coil unit, also can adopt a permanent magnet, and can be selected according to the actual structure.
In the high-voltage switch provided by the embodiment, the three sets of buffer devices are arranged on the transmission chain, the total braking force provided by the three sets of buffer devices can effectively meet the opening and closing buffering requirements of the whole high-voltage switch, at the moment, the braking force provided by each set of buffer device is relatively small, the impact force on the transmission element provided with the buffer device is small, and the high-speed impact force on a single transmission element is reduced.
Of course, in other embodiments, the damping device may also be applied to other transmission components of the transmission chain, and the specific structure of the damping device may be designed and adjusted according to the motion trajectory of the actual transmission component, so as to meet the requirement of normal operation of the damping device.
In fact, for the high-voltage switch, the number of the buffer devices is designed according to the actual braking force requirement, if one buffer device can meet the buffer braking requirement, only a single buffer device can be arranged, otherwise, the number of the buffer devices can be adjusted according to the actual requirement.
For the operating mechanism, different operating mechanisms can be configured according to actual needs, and power sources of different types of operating mechanisms are different, for example, a spring operating mechanism, an electromagnetic operating mechanism or a hydraulic operating mechanism is selected to meet the normal opening and closing requirements of the switch body as a reference. Of course, the structure of the buffering device in any one of embodiments 1 to 10 of the buffering device may be selected according to actual needs, and will not be described herein again.
The embodiment of the operating mechanism of the invention comprises:
the structure of the operating mechanism in this embodiment is the same as that of the operating mechanism in the above-mentioned embodiment of the high-voltage switch, and details are not repeated herein, the transmission portion and the power output portion form a power train of the operating mechanism, and a buffer device is provided corresponding to the power output portion serving as a transmission element to provide a buffering braking force.
Of course, in other embodiments, the damping device may be designed in the operating mechanism, and in this case, the damping device may be designed corresponding to one or two transmission components of the transmission portion, and it is necessary to consider the internal space arrangement of the operating mechanism so as not to affect the normal operation of the operating mechanism. It should be noted that, when the damping device is applied to the transmission component inside the operating mechanism, the specific form of the damping device may be adjusted according to the actual structural requirement, and specifically, the structure of the damping device in any one of embodiments 1 to 10 of the damping device may be adopted, which is not described herein again.
It should be noted that the power output portion and the power source may be of different corresponding types according to different forms of the operating mechanism, for example, when the operating mechanism is a hydraulic operating mechanism, the power output portion is an output piston rod of a hydraulic cylinder, and the power source is a hydraulic cylinder, when the operating mechanism is a spring operating mechanism, the power output portion is a rotary output shaft, and the power source is an energy storage motor and a matched energy storage spring assembly.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (9)
1. A cushioning device, comprising:
the connecting piece is fixedly connected to a corresponding transmission element, and the transmission element is a transmission component in a transmission system for outputting the opening and closing driving force on the operating mechanism (3) or a transmission component in a transmission chain formed by a power output part (4) of the operating mechanism (3) to a power input part (17) of the switch body (1) in the high-voltage switch;
one or more than two magnetic field generating units (15), wherein the magnetic field generating units are coil units or permanent magnets, and the coil units can generate magnetic fields when being electrified;
one or more than two conductor units which are arranged in one-to-one correspondence with the magnetic field generating units (15) so that when the magnetic field generating units (15) and the conductor units move relatively, the conductor units do cutting magnetic induction line movement in the magnetic field generated by the corresponding magnetic field generating units (15);
one of the magnetic field generating unit (15) and the conductor unit is fixedly arranged on the connecting piece, and the other one is used for being fixedly connected with the operating mechanism (3) or the fixed part of the high-voltage switch;
when the transmission element drives the connecting piece to move in a set stroke, the conductor unit generates eddy current when cutting the magnetic induction line, and the corresponding conductor unit and the magnetic field generating unit (15) are matched to form an eddy current braking structure which is used for blocking the relative movement of the transmission element and the fixed part and realizing the buffer braking in the opening and/or closing process;
when the magnetic field generating units (15) are fixedly arranged on the connecting piece, mounting seats are arranged on the connecting piece, the mounting seats are side plate structures (14) extending out of the connecting piece in the radial direction, the number of the mounting seats is equal to that of the magnetic field generating units (15), and one magnetic field generating unit (15) is arranged on each mounting seat.
2. A buffer device according to claim 1, wherein said connecting element comprises a fixing sleeve (13) or a hoop for fixed connection with a transmission element performing a linear motion.
3. A damper of claim 1 wherein there are more than two of said mounting seats, said mounting seats being disposed uniformly about the circumference of said drive member.
4. A buffer device according to claim 1, 2 or 3 wherein said conductor unit comprises an elongate conductor.
5. A buffer device according to claim 4, wherein the length of the elongated conductor (12) is not less than the stroke of the relative movement of the magnetic field generating unit (15) and the conductor unit.
6. A buffer device according to claim 4, characterized in that the elongated conductor (12) is of a U-shaped channel configuration, and the respective magnetic field generating unit (15) is located in said U-shaped channel configuration at a distance from the U-shaped channel configuration.
7. A buffer device according to claim 6, wherein said magnetic field generating unit (15) comprises at least two coil units or permanent magnets, all coil units or permanent magnets belonging to the same magnetic field generating unit (15) being sequentially spaced apart along the extension direction of the elongated conductor (12).
8. An operation structure comprises a power source, a transmission part and a power output part (4);
the power source drives the power output part (4) to reciprocate through the transmission part;
the power output part (4) is used for being in transmission connection with a power input part (17) of a switch body (1) of a corresponding high-voltage switch, and the transmission part and the power output part (4) form a power train of the operating mechanism (3);
the damping device is characterized in that one or more than two transmission components in the power train are transmission elements, a damping device is arranged corresponding to the transmission elements, the damping device adopts the damping device as claimed in any one of claims 1 to 7, a connecting piece of the damping device is fixedly connected to the transmission elements, one of a magnetic field generating unit (15) and a conductor unit in the damping device is fixedly connected to the connecting piece, and the other one of the magnetic field generating unit and the conductor unit is fixedly connected with a corresponding fixing part of the operating mechanism (3).
9. An extremely fast opening high voltage switch comprising:
a switch body (1) having a power input section (17);
the operating mechanism (3) is provided with a power output part (4), and the power output part (4) is in transmission connection with the power input part (17) through an intermediate transmission mechanism to form a transmission chain;
the damping device is characterized in that one or more than two transmission parts on the transmission chain are transmission elements, a damping device is arranged corresponding to the transmission elements, the damping device adopts the damping device as claimed in any one of claims 1 to 7, a connecting piece of the damping device is fixedly connected to the transmission elements, one of a magnetic field generating unit (15) and a conductor unit in the damping device is fixedly connected to the connecting piece, and the other one of the magnetic field generating unit and the conductor unit is fixedly connected with a corresponding fixing part of the high-voltage switch capable of being switched off at the highest speed.
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| CN202011444169.8A CN112713046B (en) | 2020-12-11 | 2020-12-11 | Buffer device, operating mechanism and extremely fast on-off high-voltage switch |
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| CN202011444169.8A CN112713046B (en) | 2020-12-11 | 2020-12-11 | Buffer device, operating mechanism and extremely fast on-off high-voltage switch |
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| CN112713046B true CN112713046B (en) | 2022-09-30 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016058549A1 (en) * | 2014-10-16 | 2016-04-21 | 国家电网公司 | Ultra-high-speed mechanical switch, switch fracture thereof and switch contacts thereof |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06208819A (en) * | 1993-01-11 | 1994-07-26 | Mitsubishi Electric Corp | Brake device of switch |
| US7777600B2 (en) * | 2004-05-20 | 2010-08-17 | Powerpath Technologies Llc | Eddy current inductive drive electromechanical liner actuator and switching arrangement |
| EP2339599A1 (en) * | 2009-12-22 | 2011-06-29 | ABB Research Ltd. | A switch and use thereof |
| DE102015216172A1 (en) * | 2015-08-25 | 2017-03-02 | Siemens Aktiengesellschaft | Device and method for electrical switching with a magnetic motion damper |
| CN105428106A (en) * | 2015-11-20 | 2016-03-23 | 中国西电电气股份有限公司 | High-speed switch |
| CN105390330A (en) * | 2015-12-13 | 2016-03-09 | 安徽徽电科技股份有限公司 | High-speed vacuum circuit breaker based on eddy current drive |
| CN105896877B (en) * | 2016-04-21 | 2018-08-31 | 成都茂源科技有限公司 | A kind of straight line brake rigging by electrical erratic corrent and straight line carrying device |
| CN108933060B (en) * | 2018-07-25 | 2019-12-24 | 西安交通大学 | Cascade type long-stroke electromagnetic repulsion mechanism and opening and closing lock catch system |
| CN110588360A (en) * | 2019-10-08 | 2019-12-20 | 哈尔滨工业大学 | Permanent magnet eddy current brake device with controllable braking force for high-speed train |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016058549A1 (en) * | 2014-10-16 | 2016-04-21 | 国家电网公司 | Ultra-high-speed mechanical switch, switch fracture thereof and switch contacts thereof |
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Effective date of registration: 20240929 Address after: South East of Pingdingshan city in Henan province 467001 No. 22 Patentee after: HENAN PING GAO ELECTRIC Co.,Ltd. Country or region after: China Patentee after: STATE GRID CORPORATION OF CHINA Address before: South East of Pingdingshan city in Henan province 467001 No. 22 Patentee before: PINGGAO GROUP Co.,Ltd. Country or region before: China Patentee before: STATE GRID CORPORATION OF CHINA |