CN108933060B - Cascade type long-stroke electromagnetic repulsion mechanism and opening and closing lock catch system - Google Patents
Cascade type long-stroke electromagnetic repulsion mechanism and opening and closing lock catch system Download PDFInfo
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- CN108933060B CN108933060B CN201810828499.3A CN201810828499A CN108933060B CN 108933060 B CN108933060 B CN 108933060B CN 201810828499 A CN201810828499 A CN 201810828499A CN 108933060 B CN108933060 B CN 108933060B
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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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
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Abstract
The invention discloses a cascade long-stroke electromagnetic repulsion mechanism and a closing and opening lock catch system, which comprise a motion output shaft, a power supply, a fixed surface, a plurality of repulsion coils and a plurality of repulsion discs, wherein the number of the repulsion coils is the same as that of the repulsion discs, the repulsion coils and the repulsion discs are sequentially distributed in parallel and in a staggered manner, the repulsion coil on the outermost side is fixed on the fixed surface, the motion output shaft is fixed on the repulsion disc on the outermost side, the power supply is connected with the repulsion coils, the directions of magnetic fields generated by the repulsion coils are the same, and the effective output stroke of the mechanism and the system is longer.
Description
Technical Field
The invention belongs to the technical field of high-voltage vacuum switches, and relates to a cascade type long-stroke electromagnetic repulsion mechanism and a switching-on and switching-off locking system.
Background
The switch equipment is the important control and protection equipment in the power system, and the circuit breaker in the current rated 110kV and above voltage class system mostly adopts SF6A circuit breaker. In order to meet the insulation and cut-off requirements of the high-voltage-level circuit breaker, the output stroke of the operating mechanism is generally not less than 100mm, and higher requirements are provided for the operating power of the mechanism.
The operating mechanisms meeting the requirements of the circuit breakers mostly adopt spring operating mechanisms, hydraulic spring hybrid operating mechanisms and the like, the operating mechanisms have more parts and complex transmission systems and are easily influenced by operating environment factors such as temperature, humidity and the like, and great difficulty exists in guaranteeing the operating reliability of the operating mechanisms, for example, the reliability research results of the circuit breakers in 2013 of international large power grid meetings (CIGRE) about the operating power transmission grade (110kV and above) show that more than 75% of circuit breaker failure phenomena can be attributed to the mechanical reliability problem of the operating mechanisms.
The eddy current repulsion mechanism disclosed in patents CN101986407A, CN104124110A, CN103928913A and CN101394085, etc., has the characteristics of few parts, simple power transmission structure, etc., and has been primarily applied in the technical fields of vacuum circuit breakers of 12 kV-40.5 kV voltage class, direct current circuit breakers, current limiters, etc. According to the working principle of the electromagnetic repulsion mechanism, the eddy repulsion force of the movement of the pushing mechanism is inversely proportional to the square of the output stroke of the pushing mechanism, so that the effective output stroke of the mechanism is greatly limited, and the current maximum is 10-20 mm. How to improve the output stroke becomes the bottleneck problem of the mechanism developing to higher voltage level.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a cascade type long-stroke electromagnetic repulsion mechanism and a switching-closing locking system, wherein the effective output stroke of the mechanism and the system is longer.
In order to achieve the purpose, the cascade long-stroke electromagnetic repulsion mechanism comprises a motion output shaft, a power supply, a fixed surface, a plurality of repulsion coils and a plurality of repulsion discs, wherein the number of the repulsion coils is the same as that of the repulsion discs, the repulsion coils and the repulsion discs are sequentially distributed in parallel and in a staggered manner, the repulsion coil on the outermost side is fixed on the fixed surface, the motion output shaft is fixed on the repulsion disc on the outermost side, the power supply is connected with each repulsion coil, and the directions of magnetic fields generated by each repulsion coil are the same.
The device also comprises a guide shaft, wherein one end of the guide shaft is fixed on the fixing surface, and the other end of the guide shaft sequentially penetrates through each repulsive force coil and each repulsive force disc.
The invention relates to a cascade long-stroke electromagnetic repulsion mechanism which comprises a power supply, a moving output shaft, a fixed surface, a plurality of first repulsion coils and a plurality of second repulsion coils, wherein the number of the first repulsion coils is the same as that of the second repulsion coils, the first repulsion coils and the second repulsion coils are sequentially distributed in a parallel and staggered manner, the first repulsion coils at the outermost sides are fixed on the fixed surface, the moving output shaft is fixed on the second repulsion coils at the outermost sides, the power supply is connected with the first repulsion coils and the second repulsion coils, the directions of magnetic fields generated by the first repulsion coils are the same, the directions of magnetic fields generated by the second repulsion coils are the same, and the directions of magnetic fields generated by the first repulsion coils and the second repulsion coils are opposite.
The device also comprises a guide shaft, wherein one end of the guide shaft is fixed on the fixing surface, and the other end of the guide shaft sequentially penetrates through each first repulsive coil and each second repulsive coil.
The opening and closing locking system comprises a mechanism cylinder body, and a closing holding disc, an opening holding disc, a power supply, a closing position holding disc, an upper force transmission rod, a fixed disc, a lower force transmission rod, an opening position holding disc, a plurality of groups of opening coils and a plurality of groups of closing coils which are arranged in the mechanism cylinder body;
the combined brake wire coils are positioned on the upper brake position retaining disc, the combined brake wire coils are positioned in the brake opening position retaining disc, the brake closing retaining disc and the brake opening retaining disc are provided with permanent magnets, and a power supply is connected with the brake opening coils and the combined brake wire coils.
An oil buffer is arranged between the lower end of the lower dowel bar and the opening position maintaining disc.
And a closing limiting disc is arranged in the mechanism cylinder body, wherein the closing limiting disc is positioned between each group of opening coils and the closing position maintaining disc.
The invention has the following beneficial effects:
when the cascade long-stroke electromagnetic repulsion mechanism and the opening and closing locking system are specifically operated, the directions of the magnetic fields generated by the first repulsion coil and the first repulsion coil are opposite by adjusting the current direction and the winding direction of the first repulsion coil and the second repulsion coil, namely, the repulsion action is generated between the adjacent first repulsion coil and the second repulsion coil, and the effective output stroke of the repulsion mechanism is improved by the superposition of the displacement between each first repulsion coil and each second repulsion coil, so that the requirement of the large output stroke of the high-voltage circuit breaker in the power transmission grade is met. Meanwhile, the direction of a magnetic field generated by each repulsion coil is the same by adjusting the flowing direction and the winding direction of current in each repulsion coil, and according to the electromagnetic induction principle, the direction of an eddy current magnetic field of each repulsion coil is opposite to the direction of a magnetic field of an adjacent repulsion coil, so that a repulsion action is generated between the adjacent repulsion coils and the repulsion coils, the effective output stroke of the repulsion mechanism is improved, and the requirement of the large output stroke of the high-voltage circuit breaker in the power transmission level is met. In addition, through the combination of two repulsion mechanisms, the opening and closing locking operation of the circuit breaker is realized, the structure is simple, the reliability is higher, and the maintenance cost is low.
Drawings
FIG. 1 is a schematic structural diagram according to a first embodiment;
FIG. 2 is a schematic structural diagram of the second embodiment;
fig. 3 is a schematic structural diagram of the third embodiment.
The device comprises a shell, a driving mechanism, a.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
example one
As shown in fig. 1, the cascade type long-stroke electromagnetic repulsion mechanism of the present invention includes a moving output shaft 4, a power supply, a fixing surface 5, a plurality of repulsion coils 1 and a plurality of repulsion discs 2, wherein the number of the repulsion coils 1 is the same as that of the repulsion discs 2, the repulsion coils 1 and the repulsion discs 2 are sequentially distributed in parallel and in a staggered manner, the outermost repulsion coil 1 is fixed on the fixing surface 5, the moving output shaft 4 is fixed on the outermost repulsion disc 2, the power supply is connected with each repulsion coil 1, and the magnetic fields generated by each repulsion coil 1 have the same direction. The invention also comprises a guide shaft 3, wherein one end of the guide shaft 3 is fixed on the fixing surface 5, and the other end of the guide shaft 3 sequentially passes through each repulsive coil 1 and each repulsive disc 2.
The breaker adopts two electromagnetic repulsion mechanisms to realize opening and closing, and when the breaker is operated to open and close, the repulsion plate 2 induces eddy electromagnetic repulsion by controlling the current flowing into the repulsion coil 1, so as to realize the large output stroke of the operating mechanism. The repulsion coil 1 directly discharges the capacitor oscillation circuit or discharges the capacitor oscillation circuit in a PWM (pulse width modulation) adjusting mode, an eddy current magnetic field opposite to the direction of the magnetic field of the repulsion coil 1 is induced between the repulsion discs 2, and the repulsion action of the magnetic field provides the closing force or opening force required by the circuit breaker.
Example two
The invention relates to a cascade type long-stroke electromagnetic repulsion mechanism which comprises a power supply, a moving output shaft 4, a fixed surface 5, a plurality of first repulsion coils 6 and a plurality of second repulsion coils 7, wherein the number of the first repulsion coils 6 is the same as that of the second repulsion coils 7, each first repulsion coil 6 and each second repulsion coil 7 are sequentially distributed in a parallel and staggered manner, the first repulsion coil 6 at the outermost side is fixed on the fixed surface 5, the moving output shaft 4 is fixed on the second repulsion coil 7 at the outermost side, the power supply is connected with each first repulsion coil 6 and each second repulsion coil 7, the directions of magnetic fields generated by each first repulsion coil 6 are the same, the directions of magnetic fields generated by each second repulsion coil 7 are the same, and the directions of magnetic fields generated by each first repulsion coil 6 and each second repulsion coil 7 are opposite. The invention also comprises a guide shaft 3, wherein one end of the guide shaft 3 is fixed on the fixed surface 5, and the other end of the guide shaft 3 sequentially passes through each first repulsive coil 6 and each second repulsive coil 7.
The circuit breaker can realize the switching-on and switching-off operation function by adopting a single electromagnetic repulsion mechanism, and during switching-on operation, the current flowing into the first repulsion coil 6 and the second repulsion coil 7 is controlled, so that the adjacent first repulsion coil 6 and the second repulsion coil 7 generate magnetic fields with opposite directions, further each first repulsion coil 6 and each second repulsion coil 7 generate electromagnetic repulsion, and the motion output shaft 4 is pulled to complete the switching-on operation; when the brake is opened, the current direction flowing into the first repulsion coil 6 and the second repulsion coil 7 is controlled, so that the adjacent first repulsion coil 6 and the second repulsion coil 7 generate magnetic fields with the same direction, and then each first repulsion coil 6 and each second repulsion coil 7 generate electromagnetic attraction to pull the motion output shaft 4 to complete the brake opening operation.
EXAMPLE III
The switching-on/off locking system comprises a mechanism cylinder body 8, a switching-on holding disc 9, a switching-off holding disc 20, a switching-on position holding disc 10, an upper force transmission rod 12, a fixed disc 15, a lower force transmission rod 16, a power supply, a switching-off position holding disc 19, a plurality of groups of switching-on coils 14 and a plurality of groups of switching-off coils 18, wherein the switching-on holding disc 9, the switching-off holding disc 20, the switching-on position holding disc 10, the upper force transmission rod; the closing holding disc 9 and the opening holding disc 20 are respectively fixed at the top and the bottom of the mechanism cylinder 8, the closing position holding disc 10 is fixed at the upper end of an upper force transmission rod 12, the lower end of the upper force transmission rod 12 is fixed on a fixed disc 15, each group of opening coils 14 is sleeved on the upper force transmission rod 12, the upper end of a lower force transmission rod 16 is fixed on the fixed disc 15, the lower end of the lower force transmission rod 16 is fixed on an opening position holding disc 19, each group of closing coils 18 is sleeved on the lower force transmission rod 16, each combined closing coil 18 is positioned on the opening position holding disc 19, permanent magnets 11 are arranged in the opening position holding disc 19, in the closing position holding disc 10, the closing holding disc 9 and the opening holding disc 20, and a power supply is connected with each group of opening coils 14 and each group of closing coils 18; an oil buffer 17 is arranged between the lower end of the lower dowel bar 16 and the brake separating position holding disc 19; a closing limiting disc 13 is arranged in the mechanism cylinder 8, wherein the closing limiting disc 13 is positioned between each group of opening coils 14 and the closing position maintaining disc 10, and each group of closing coils 18 and each group of opening coils 14 respectively comprise a first repulsive coil 6 and a second repulsive coil 7.
When each combined brake coil 18 is electrified to perform a closing operation, under the action of the electromagnetic repulsion force of the combined brake coil 18, the brake separating position retaining disc 19 overcomes the attraction force of the permanent magnet 11 and moves upwards until the brake closing position retaining disc 10 is contacted with the brake closing retaining disc 9, meanwhile, each combined brake coil 18 moves to the position of the brake closing limiting disc 13, and the function of keeping the circuit breaker closed is completed through the attraction force of the permanent magnet 11 in the brake closing retaining disc 9 and the brake closing position retaining disc 10.
When the opening operation is performed, under the action of the electromagnetic repulsion force of each group of opening coils 14 and the gravity of the transmission part, the opening operation is started by overcoming the suction force of the permanent magnet 11 until the opening position retaining disc 19 moves to the opening retaining disc 20, meanwhile, the closing position retaining disc 10 moves downwards to the upper edge of the closing limiting disc 13, the opening retaining function of the circuit breaker is completed through the suction force of the permanent magnet 11 in the opening position retaining disc 19 and the opening retaining disc 20, and in the initial stage of the opening operation, the closing limiting disc 13 provides the counter-acting force of the electromagnetic repulsion force of each group of opening coils 14.
In order to overcome the brake-separating overshoot phenomenon of the cascade type large-output stroke electromagnetic repulsion mechanism, an oil buffer 17 is arranged at the tail end part of the lower dowel bar 16 to play a brake-separating buffering role.
Referring to fig. 3, the closing/opening characteristic curve of the electromagnetic repulsion mechanism can be realized by adjusting the current waveform flowing through each set of opening coils 14 and each set of closing coils 18 and the supply mode of the current. For a vacuum circuit breaker of a transmission grade, the closing operation of the vacuum circuit breaker requires that the circuit breaker is closed at a higher speed in the whole period from the pre-breakdown occurrence time before the contact is closed to the contact metal contact time, so as to reduce the ablation and damage of the pre-breakdown arc to the contact surface of a vacuum arc-extinguishing chamber and reduce the occurrence probability of contact fusion welding.
For the opening operation of the vacuum circuit breaker in the power transmission grade, the circuit breaker is required to be opened at a higher opening speed at the moment when the contact is opened and closed by a short arcing, so that the heating and ablation of the concentrated vacuum arc on the surface of the contact are avoided, the metal steam pressure during arcing is reduced, and the recovery of the contact gap dielectric strength after the current passes through the zero-crossing arc is facilitated; however, when the long-burning arc is switched on and off, the moving contact is required to be switched off at a slower speed in a certain open distance area, so that the arc is sufficiently controlled by the (longitudinal) magnetic field generated by the longitudinal magnetic contact, the formation of a vacuum arc anode spot is avoided, and the short-circuit current switching-on and switching-off performance is improved. In this case, the current flowing into each set of opening coils 14 at the opening initial stage can be increased to provide a higher initial opening speed, and after the contact enters the opening distance region with the best opening performance of the vacuum arc-extinguishing chamber, the current is introduced into each set of closing coils 18 to cause the repulsion plate 2 to reduce the opening speed under the action of the electromagnetic repulsion opposite to the repulsion plate.
Claims (3)
1. The switching-off and switching-on locking system is characterized by comprising a mechanism cylinder body (8), a switching-on retaining disc (9), a power supply, a switching-off retaining disc (20), a switching-on position retaining disc (10), an upper force transmission rod (12), a fixed disc (15), a lower force transmission rod (16), a switching-off position retaining disc (19), a plurality of groups of switching-off coils (14) and a plurality of groups of switching-on coils (18), wherein the switching-off retaining disc (9), the power supply, the switching-off retaining disc (20), the switching-on position retaining disc (;
a closing holding disc (9) and an opening holding disc (20) are respectively fixed at the top and the bottom of the mechanism cylinder body (8), a closing position holding disc (10) is fixed at the upper end of an upper force transmission rod (12), the lower end of the upper force transmission rod (12) is fixed on a fixed disc (15), each group of opening coils (14) is sleeved on the upper force transmission rod (12), the upper end of a lower force transmission rod (16) is fixed on the fixed disc (15), the lower end of the lower force transmission rod (16) is fixed on an opening position holding disc (19), each group of closing coils (18) is sleeved on the lower force transmission rod (16), and each group of closing coils (18) are positioned on the opening position holding disc (19), permanent magnets (11) are arranged in the opening position holding disc (19), the closing position holding disc (10), the closing holding disc (9) and the opening holding disc (20), and a power supply is connected with each group of opening coils (14) and each group of closing coils (18).
2. Opening and closing latch system according to claim 1, characterized in that an oil buffer (17) is provided between the lower end of the lower dowel (16) and the opening position holding disc (19).
3. A switching-on and switching-off latching system according to claim 1, wherein a switching-on limiting disc (13) is provided in the mechanism cylinder (8), wherein the switching-on limiting disc (13) is located between each set of switching-off coils (14) and the switching-on position maintaining disc (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810828499.3A CN108933060B (en) | 2018-07-25 | 2018-07-25 | Cascade type long-stroke electromagnetic repulsion mechanism and opening and closing lock catch system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810828499.3A CN108933060B (en) | 2018-07-25 | 2018-07-25 | Cascade type long-stroke electromagnetic repulsion mechanism and opening and closing lock catch system |
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| CN108933060A CN108933060A (en) | 2018-12-04 |
| CN108933060B true CN108933060B (en) | 2019-12-24 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110223892A (en) * | 2019-06-12 | 2019-09-10 | 华中科技大学 | A kind of lightweight compact electromagnetic repulsion mechanism |
| CN110416034B (en) * | 2019-07-11 | 2024-03-19 | 明珠电气股份有限公司 | Long-stroke electromagnetic repulsion mechanism |
| CN110428986A (en) * | 2019-08-19 | 2019-11-08 | 南京南瑞继保电气有限公司 | Electromagnetic repulsion force operating device and switch based on electromagnetic repulsion force operating device |
| CN112713046B (en) * | 2020-12-11 | 2022-09-30 | 平高集团有限公司 | Buffer device, operating mechanism and extremely fast on-off high-voltage switch |
| CN113241267B (en) * | 2021-03-29 | 2023-02-17 | 平高集团有限公司 | Quick opening/closing electromagnetic repulsion mechanism and quick opening/closing switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TW201138271A (en) * | 2010-04-26 | 2011-11-01 | Chuan-Sheng Chen | Armature-free coil motor |
| CN204011313U (en) * | 2014-07-17 | 2014-12-10 | 华中科技大学 | A kind of asymmetric repulsive force mechanism |
| CN104270031B (en) * | 2014-08-15 | 2017-02-15 | 大连理工大学 | Multi-level precision positioning piezoelectric actuator |
| CN105161325B (en) * | 2015-08-18 | 2017-08-25 | 平高集团有限公司 | Dynamic repulsion dish and the repulsive force mechanism using the dynamic repulsion dish |
| CN105244199B (en) * | 2015-11-03 | 2019-04-26 | 国家电网公司 | Coil device and the electromagnetic repulsion mechanism and high-speed switch for using the coil device |
| CN106653471A (en) * | 2016-10-14 | 2017-05-10 | 国网内蒙古东部电力有限公司赤峰供电公司 | Double-splitting closing coil vacuum circuit breaker |
| CN206323278U (en) * | 2016-11-11 | 2017-07-11 | 中国煤炭科工集团太原研究院有限公司 | The high-power distance-limiting type permanent magnet eddy current coupling of multi-disc type |
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