CN114838162B - Pressure reducing valve - Google Patents
Pressure reducing valve Download PDFInfo
- Publication number
- CN114838162B CN114838162B CN202210558726.1A CN202210558726A CN114838162B CN 114838162 B CN114838162 B CN 114838162B CN 202210558726 A CN202210558726 A CN 202210558726A CN 114838162 B CN114838162 B CN 114838162B
- Authority
- CN
- China
- Prior art keywords
- inlet
- armature
- outlet
- communicated
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005389 magnetism Effects 0.000 claims description 48
- 238000010992 reflux Methods 0.000 claims description 15
- 239000000696 magnetic material Substances 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 4
- 229910052742 iron Inorganic materials 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 9
- 230000010354 integration Effects 0.000 abstract description 5
- 230000009471 action Effects 0.000 description 12
- 238000012545 processing Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000003831 antifriction material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
- F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0603—Multiple-way valves
- F16K31/061—Sliding valves
- F16K31/0613—Sliding valves with cylindrical slides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0686—Braking, pressure equilibration, shock absorbing
- F16K31/0693—Pressure equilibration of the armature
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention relates to the technical field of hydraulic control, and discloses a pressure reducing valve, which comprises a pole shoe, an armature elastic piece and a driving assembly, wherein the pole shoe is provided with a connecting end and a mounting end, the connecting end is provided with a first inlet and a second inlet and a third inlet, the mounting end is provided with a fourth inlet and a fifth inlet and a sixth inlet, the fourth inlet is communicated with the first inlet and the fifth inlet, the fifth inlet is communicated with the second inlet and the sixth inlet, and the sixth inlet is communicated with the third inlet; the armature is provided with a seventh inlet and a eighth inlet and a fifth inlet which are communicated with each other, the armature is arranged opposite to the fifth inlet and the fifth inlet, and the armature can be close to or far from the mounting end of the pole shoe under the drive of the elastic piece and the driving component and covers or opens the fifth inlet and the fifth outlet. By adopting the pressure reducing valve of the technical scheme, the pressure reducing process can be realized in the pressure reducing valve, an external valve core and a valve sleeve are omitted, the power ratio of the pressure reducing valve is greatly improved, and the pressure reducing valve has higher integration level.
Description
Technical Field
The invention relates to the technical field of hydraulic control, in particular to a pressure reducing valve.
Background
The pressure reducing valve is a hydraulic element for achieving the purpose of reducing pressure by throttling energy consumption, and the output pressure and the control current of the pressure reducing valve meet the proportion relation, so that the pressure reducing valve is widely applied to the fields of excavators, bulldozers, agricultural machinery and the like. Most of the pressure reducing valves in the market at present are composed of electromagnetic coils, valve cores and valve sleeves, hydraulic feedback force can be formed on the surfaces of the valve cores, and control of system output pressure is achieved through maintaining force balance relation.
Miniaturization is an important direction of development of the hydraulic element, and through a compact structure and an integrated design, the hydraulic element is convenient to install, space is saved, and the hydraulic element has a wide market application prospect.
Disclosure of Invention
The purpose of the invention is that: the pressure reducing valve can realize the pressure reducing process in the pressure reducing valve, omits an external valve core and a valve sleeve, greatly improves the power ratio of the pressure reducing valve, and has higher integration level.
In order to achieve the above object, the present invention provides a pressure reducing valve comprising:
the pole shoe is provided with a connecting end and a mounting end, the connecting end is provided with a first inlet and a second inlet and a third inlet and a fourth inlet and a fifth inlet and a sixth inlet, the fourth inlet and the fifth inlet are communicated with the first inlet and the second inlet, the fifth inlet and the fifth outlet are communicated with the second inlet and the sixth inlet and the third inlet and the sixth outlet are communicated with the third inlet and the third outlet;
The armature is provided with a seventh inlet and a eighth inlet and a seventh outlet which are mutually communicated, and the armature and the fifth inlet and the fifth outlet are oppositely arranged;
The elastic piece is arranged between the armature and the pole shoe and can drive the armature to move away from the pole shoe; and
A drive assembly capable of driving the armature toward the pole piece and covering the fifth port;
the armature has a first position state and a second position state,
When the armature is in the first position state, the elastic piece drives the armature to move in a direction away from the pole shoe and opens the fifth inlet and outlet, and the fifth inlet and outlet is communicated with the sixth inlet and outlet;
When the armature is in a second position state, the driving assembly drives the armature to move in a direction close to the pole shoe and cover the fifth inlet and outlet, the seventh inlet and outlet are communicated with the fourth inlet and outlet, and the eighth inlet and outlet are communicated with the sixth inlet and outlet.
In some embodiments, the drive assembly includes an electromagnetic coil disposed around the armature, the electromagnetic coil being configured to drive the armature toward the pole piece.
In some embodiments, the pole shoe has a mounting groove, the elastic element is mounted in the mounting groove, the front end of the mounting groove is communicated with the fifth inlet and outlet, the rear end of the mounting groove is provided with a limiting groove, the caliber of the limiting groove is larger than that of the mounting groove, a limiting step is formed between the limiting groove and the mounting groove, the armature is slidably inserted in the limiting groove, and the diameter of the end part of the armature is larger than that of the notch of the mounting groove and smaller than that of the limiting groove.
In some embodiments, the armature is provided with a relief passage, the seventh inlet and outlet is communicated with the relief passage when the armature is in the second position state, the bottom of the relief passage is provided with the eighth inlet and outlet, and the eighth inlet and outlet is positioned above the sixth inlet and outlet when the armature is in the first position state.
In some embodiments, a magnetism isolating bush is arranged on the inner wall of the limit groove, the magnetism isolating bush is made of a non-magnetic conductive material, when the armature is in the first position state, the inner wall of the magnetism isolating bush is abutted with the outer wall of the armature, and the seventh inlet and outlet are blocked from the overflow channel.
In some embodiments, a throttle groove is provided on the periphery of the armature, and the seventh inlet and outlet are defined between the throttle groove and the magnetism isolating bush.
In some embodiments, the pressure reducing valve further comprises a magnetism isolating valve core made of non-magnetic conductive materials, the magnetism isolating valve core is arranged at the front end of the armature, a reflux groove is arranged on the magnetism isolating valve core, a passage for communicating the sixth inlet and the fifth inlet is formed between the reflux groove and the pole shoe, when the armature is in the second position state, the reflux groove is communicated with the sixth inlet and the fifth inlet,
When the armature is in the first position state, the overflow channel is formed among the outer wall of the magnetism isolating valve core, the inner wall of the pole shoe and the armature.
In some embodiments, the pressure reducing valve further comprises a magnetism isolating valve core made of a non-magnetic conductive material, the magnetism isolating valve core is arranged at the front end of the armature, at least one reflux groove is arranged on the magnetism isolating valve core, a passage for communicating the sixth inlet and the fifth outlet is formed between the reflux groove and the pole shoe, and when the armature is in a second position state, the reflux groove is communicated with the sixth inlet and the fifth outlet.
In some embodiments, the pressure reducing valve further comprises a limiting piece, the magnetism isolating valve core is provided with a through hole, the limiting piece is inserted into the through hole of the magnetism isolating valve core, the limiting piece is provided with a through hole penetrating through the limiting piece, the limiting piece is in butt joint with the elastic piece, and the outer diameter of the limiting piece is smaller than the caliber of the limiting groove.
In some embodiments, the pressure reducing valve further comprises a skeleton and a magnetic conducting ring, wherein the skeleton is coated on the outer side of the armature and at least coats the mounting end of the pole shoe, the magnetic conducting ring is arranged at the rear end of the armature, and the magnetic conducting ring is made of soft magnetic materials.
In some embodiments, the pressure reducing valve further comprises a housing made of soft magnetic material, wherein a mounting opening is formed in the front end of the housing, the armature, the pole shoe, the framework and the magnetic conducting ring are mounted in the housing from the mounting opening, and the inner wall of the housing is in interference fit with the outer wall of the connecting end of the pole shoe.
Compared with the prior art, the pressure reducing valve has the beneficial effects that:
In the pressure reducing valve provided by the embodiment of the invention, in the first position state, the armature is positioned at the rightmost side under the action of the driving component, the second inlet and the third inlet are communicated, the first inlet and the third inlet are in a closed state, at the moment, the pressure at the third inlet and the third outlet is the smallest and is equal to the pressure at the second inlet and the third outlet, when the driving component drives the armature to move leftwards, the third inlet and the third outlet are communicated, the second inlet and the third outlet are in a closed state, at the moment, the pressure at the third inlet and the third outlet can be increased under the action of the first inlet and the third outlet, and when the pressure at the third inlet and the third outlet is increased to a certain extent, the armature moves rightwards, under the combined action of the oil pressure, the elastic piece and the driving component, the armature reaches balance again at a new position, so that the proportion control of the output pressure of the pressure reducing valve is realized, the pressure reducing process can be realized inside the pressure reducing valve, an external valve core and a valve sleeve are omitted, and the pressure reducing valve is provided with higher integration degree.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of a pressure relief valve in a first position according to one embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a pressure relief valve in accordance with one embodiment of the present invention in a second position;
fig. 3 is a schematic illustration of the structure of an armature in one embodiment of the invention;
FIG. 4 is a schematic structural view of a cross-section of a pole piece in one embodiment of the invention;
FIG. 5 is a schematic diagram of the structure of a magnetically isolated valve cartridge in one embodiment of the present invention;
in the figure, 100, a pole shoe, 110, a first inlet and outlet, 120, a second inlet and outlet, 130, a third inlet and outlet, 140, a fourth inlet and outlet, 150, a fifth inlet and outlet, 160, a sixth inlet and outlet, 170, a mounting groove, 180, a limit groove, 190 and a magnetism isolating bushing; 200. an elastic member; 300. a limiting piece; 400. an armature, 410, a seventh inlet and outlet, 420, and a throttle groove; 500. a magnetism isolating valve core 510, a reflux groove 520 and an eighth inlet and outlet; 600. outer protection component 610, skeleton 620, shell 700, slide bearing 800, electromagnetic coil 900, magnetic conduction ring.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the terms "first," "second," and the like are used herein to describe various information, but such information should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention is further explained and illustrated below with reference to the drawing and the specific embodiments of the present specification. The step numbers in the embodiments of the present invention are set for convenience of illustration, and the order of steps is not limited in any way, and the execution order of the steps in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.
As shown in fig. 1 to 5, a pressure reducing valve according to a preferred embodiment of the present invention includes a pole piece 100, an armature 400, an elastic member 200 and a driving assembly,
The pole shoe 100 is provided with a connecting end and a mounting end, the connecting end is provided with a first inlet and outlet 110, a second inlet and outlet 120 and a third inlet and outlet 130, the mounting end is provided with a fourth inlet and outlet 140, a fifth inlet and outlet 150 and a sixth inlet and outlet 160, the fourth inlet and outlet 140 is communicated with the first inlet and outlet 110, the fifth inlet and outlet 150 is communicated with the second inlet and outlet 120, and the sixth inlet and outlet 160 is communicated with the third inlet and outlet 130; in some embodiments, the fourth inlet 140 and the first inlet 110 are straight pipes, the fifth inlet 150 and the second inlet 120 are straight pipes, and the sixth inlet 160 and the third inlet 130 are straight pipes, so that the pole shoe 100 is convenient to process and manufacture, the pole shoe 100 is compact in structure, the processing technology of the pole shoe 100 is simplified, the processing and manufacturing cost of the pole shoe 100 is reduced, and the straight pipes facilitate liquid flow.
The armature 400 is provided with a seventh inlet and outlet 410 and an eighth inlet and outlet 520 which are communicated with each other, the armature 400 is arranged opposite to the fifth inlet and outlet 150, and the armature 400 can be close to the mounting end of the pole shoe 100 and cover the fifth inlet and outlet 150 under the drive of the driving assembly;
the elastic piece 200 is arranged between the pole shoe 100 and the armature 400, and the elastic piece 200 can drive the armature 400 to move away from the pole shoe 100;
the armature 400 has a first position state and a second position state,
When the armature 400 is in the first position, the elastic member 200 drives the armature 400 to move away from the pole piece 100 and opens the fifth port 150, the fifth port 150 communicates with the sixth port 160,
When the armature 400 is in the second position, the driving assembly drives the armature 400 to move in a direction approaching the pole piece 100 and covering the fifth port 150, the seventh port 410 communicates with the fourth port 140, the eighth port 520 communicates with the sixth port 160,
When the armature 400 is in the second position, if the oil pressure continues to increase, the driving assembly, the oil pressure and the elastic member 200 drive the armature 400 to move, so as to form dynamic balance, thereby realizing the requirement of changing the output pressure.
In this embodiment, the first inlet and outlet 110 is an oil inlet P, the second inlet and outlet 120 is an oil return port T, and the third inlet and outlet 130 is a working oil port a.
Based on the above technical solution, as shown in fig. 1, in the first position state, the armature 400 is located at the rightmost side under the action of the driving component, the oil return port T is communicated with the working oil port a, the oil inlet P is in the closed state, at this time, the pressure at the working oil port a is the minimum, and is equal to the pressure at the oil return port T, and the flow direction of the oil is shown by the arrow in fig. 1.
As shown in fig. 2, when the driving assembly drives the armature 400 to move leftwards, the working oil port a is communicated with the oil inlet P, the oil return port T is in a closed state, and at this time, the pressure at the working oil port a is increased under the action of the oil inlet P, and the flow direction of the oil is shown by an arrow in fig. 2.
When the pressure at the working oil port A is increased to a certain extent, the armature 400 moves rightwards, and under the combined action of the elastic element, the oil pressure and the driving component, the armature 400 reaches balance at a new position, so that the proportional control of the output pressure of the pressure reducing valve is realized, the pressure reducing process can be realized inside the electromagnetic coil 800, an external valve core and a valve sleeve are omitted, and the pressure reducing valve has higher integration level.
In some embodiments, the drive assembly includes an electromagnetic coil 800, the electromagnetic coil 800 being disposed around the armature 400, the electromagnetic coil 800 being capable of driving the armature 400 toward the pole piece 100. The electromagnetic coil 800 and the armature 400 constitute an electromagnet, and in some embodiments, the electromagnetic coil 800 is wound from an enamel wire, the electromagnetic coil 800 is wound into a solenoid structure, and the electromagnetic coil 800 is used to generate an excitation magnetic field.
In some embodiments, the spring 200 is a less stiff spring mounted between the pole piece 100 and the armature 400; when the solenoid 800 is de-energized, the spring may return the armature 400 to the initial position. In some embodiments, the pole shoe 100 has a mounting groove 170, the spring is mounted in the mounting groove 170, the mounting groove 170 is arranged so as to facilitate the mounting and positioning of the spring, the mounting groove 170 can guide the spring when the spring is compressed, the front end of the mounting groove 170 is communicated with the fifth inlet and outlet 150, the rear end of the mounting groove 170 is provided with a limit groove 180, the caliber of the limit groove 180 is larger than that of the mounting groove 170, a limit step is formed between the limit groove 180 and the mounting groove 170, the armature 400 is slidably inserted in the limit groove 180, the diameter of the end part of the armature 400 is larger than that of the notch of the mounting groove 170 and smaller than that of the limit groove 180, so that the armature 400 can slide in the limit groove 180, and the end part of the armature 400 can block the notch of the mounting groove 170 so that the second inlet and outlet 120 is disconnected from other passages.
In some embodiments, the armature 400 is provided with a relief passage, when the armature 400 is in the second position, the seventh inlet and outlet 410 is communicated with the relief passage, the bottom of the relief passage forms an eighth inlet and outlet 520, when the armature 400 is in the first position, the eighth inlet and outlet 520 is located above the sixth inlet and outlet 160, and the relief passage is provided, so that the first inlet and outlet 110 is communicated with the third inlet and outlet 130, and further, the eighth inlet and outlet 520 is located above the sixth inlet and outlet 160, so that a connecting path is further shortened, and the first inlet and outlet 110 is communicated with the third inlet and outlet 130.
In some embodiments, the inner wall of the limit groove 180 is provided with a magnetism isolating bush 190, the magnetism isolating bush 190 is formed by processing a non-magnetic conductive material, the magnetism isolating bush 190 is in a cylindrical structure, a through hole is formed in the magnetism isolating bush 190, the inner surface of the magnetism isolating bush 190 is in clearance fit with the outer surface of the armature 400, when the armature 400 is in the first position state, the inner wall of the magnetism isolating bush 190 is abutted with the outer wall of the armature 400, and the seventh inlet and outlet 410 and the overflow channel are blocked. In some embodiments, the outer wall of the magnetic spacer 190 is welded to the inner wall of the pole piece 100, thereby ensuring a reliable and low cost connection of the magnetic spacer 190 to the pole piece 100.
In some embodiments, a throttle groove 420 is provided on the outer periphery of the armature 400, and a seventh port 410 is defined between the throttle groove 420 and the magnetic shield 190.
In some embodiments, the armature 400 is made of a soft magnetic material, and the armature 400 is a stepped shaft structure; the periphery of the stepped shaft of the armature 400 is provided with four throttling grooves 420, and the four throttling grooves 420 are uniformly distributed along the periphery of the armature 400; an oil inlet channel is formed between the throttling groove 420 and the inner wall of the magnetism isolating bush 190, and a seventh inlet and outlet 410 is formed between the side wall of the magnetism isolating bush 190 and the armature 400; the armature 400 is internally provided with a through hole for oil.
In some embodiments, the pressure reducing valve further comprises a magnetism isolating valve core 500, the magnetism isolating valve core 500 is made of non-magnetic conductive materials, the magnetism isolating valve core 500 is arranged at the front end of the armature 400, a reflux groove 510 is arranged on the magnetism isolating valve core 500, a passage which is communicated with the sixth inlet and outlet 160 and the fifth inlet and outlet 150 is formed between the reflux groove 510 and the pole shoe 100, when the armature 400 is in the second position state, the reflux groove 510 is communicated with the sixth inlet and outlet 160 and the fifth inlet and outlet 150,
When the armature 400 is in the first position, a relief passage is formed between the outer wall of the magnetically isolated valve core 500, the inner wall of the pole piece 100, and the armature 400.
In some embodiments, the magnetism isolating valve core 500 is in a stepped shaft structure, the stepped surface of the magnetism isolating valve core 500 is provided with four reflux grooves 510, and the four reflux grooves 510 are uniformly distributed on the circumference of the magnetism isolating valve core 500; an oil return passage is formed between the return groove 510 and the pole piece 100, and communicates with the sixth inlet 160 and the fifth inlet 150 when the armature 400 is in the second position.
In some embodiments, a through hole is formed inside the magnetism isolating valve core 500; the through hole is in interference fit with the limiting piece 300, so that the limiting piece 300 is installed and positioned; in some embodiments, the magnetism isolating valve core 500 and the armature 400 are welded, so that the magnetism isolating valve core 500 and the armature 400 are reliably connected, the connection process of the magnetism isolating valve core 500 and the armature 400 is simplified, and the cost is reduced.
In some embodiments, the pressure reducing valve further includes a limiting member 300, the magnetism isolating valve core 500 is provided with a through hole, the limiting member 300 is inserted in the through hole of the magnetism isolating valve core 500, the limiting member 300 is provided with a through hole penetrating the limiting member 300, the limiting member 300 is abutted with the elastic member 200, and the outer diameter of the limiting member 300 is smaller than the caliber of the limiting groove 180. The stopper 300 serves to limit the minimum distance between the pole piece 100 and the armature 400, avoiding the generation of a large electromagnetic force.
In some embodiments, the stop 300 is machined from a non-magnetically permeable material; the limiting piece 300 is of a stepped shaft structure, and the smaller diameter end of the stepped shaft is in interference fit with the through hole in the magnetism isolating valve core 500; the limiting piece 300 is internally provided with a through hole for oil to pass through; the stopper 300 serves to limit the relative positions of the pole piece 100 and the magnetism isolating valve core 500.
In some embodiments, the pressure reducing valve is further provided with an outer protection component 600, the outer protection component 600 includes a skeleton 610 and a magnetic conduction ring 900, the skeleton 610 is coated on the outer side of the armature 400 and at least coats the mounting end of the pole shoe 100, the magnetic conduction ring 900 is arranged at the rear end of the armature 400, the magnetic conduction ring 900 is made of soft magnetic material, the magnetic conduction ring 900 is in a cylindrical structure, a through hole is formed in the magnetic conduction ring 900, and the magnetic conduction ring 900 is used for conducting magnetic.
In some embodiments, the outer protection assembly 600 further includes a housing 620, the housing 620 is made of soft magnetic material, a front end of the housing 620 has a mounting opening, the armature 400, the pole shoe 100, the armature 610 and the magnetic ring 900 are mounted in the housing 620 from the mounting opening, an inner wall of the housing 620 is in interference fit with an outer wall of a connecting end of the pole shoe 100, thereby positioning and mounting the pole shoe 100 and the housing 620, and an outer surface of the magnetic ring 900 contacts an inner surface of the housing 620. One of the housings 620 functions to mount an electromagnet assembly; the two functions of the housing 620 are for magnetic conduction.
In some embodiments, the first inlet and outlet 110, the second inlet and outlet 120 and the third inlet and outlet 130 are cylindrical steps Kong Chenkong arranged on the end surface of the connecting end of the pole shoe 100, so that the first inlet and outlet 110, the second inlet and outlet 120 and the third inlet and outlet 130 can be conveniently processed, the counter bore is convenient for ensuring the precision of connection with other parts, and meanwhile, the protection effect on the first inlet and outlet 110, the second inlet and outlet 120 and the third inlet and outlet 130 can be achieved.
In some embodiments, the pole piece 100 and the armature 400 are both made of soft magnetic material. In some embodiments, the end surface of the installation end of the pole shoe 100 is machined with an inclined plane with a certain angle, the inclined plane is used for generating electromagnetic force which does not change with displacement by the electromagnetic coil 800, and the inclined plane gradually inclines towards the axial direction of the pole shoe 100 from front to back, on one hand, the inclined plane can enable the electromagnetic coil 800 to generate electromagnetic force which does not change with displacement, on the other hand, the inclined plane plays a role in guiding flow, so that oil can conveniently enter the seventh inlet and outlet 410.
In some embodiments, the rear end of the armature 400 is sleeved with a sliding bearing 700, the sliding bearing 700 being machined from a soft magnetic material; the sliding bearing 700 is clearance-fitted with the outer circumferential surface of the rear end of the armature 400, thereby facilitating sliding of the armature 400; in some embodiments, the surface of the sliding bearing 700 is coated with an antifriction material that is used to reduce friction with the surface of the armature 400.
The working process of the invention is as follows: when not energized, as shown in fig. 1, no magnetic field is generated in the electromagnetic coil 800, the armature 400 is positioned at the rightmost side under the action of the spring, the oil return port T is communicated with the working oil port a, the oil inlet P is in a closed state, at this time, the pressure of the working oil port a is minimum, and is equal to the pressure at the oil return port T, and the flow direction of oil is shown by an arrow in fig. 1.
As shown in fig. 2, when energized, the electromagnetic coil 800 generates an excitation magnetic field, thereby generating an electromagnetic force between the pole piece 100 and the armature 400. The armature 400 moves leftwards against the elastic force of the return spring under the action of electromagnetic force, the working oil port A is communicated with the oil inlet P, the oil return port T is in a closed state, the pressure of the working oil port A is increased under the action of the oil inlet P, and the flowing direction of oil is shown by an arrow in fig. 2. When the pressure at the working oil port a increases to a certain extent, the armature 400 moves rightward, the spring force of the spring, the electromagnetic force and the feedback hydraulic force at the working oil port a are balanced again at the new position, and the working oil port a, the oil return port T and the oil inlet P are all in a cut-off state. As the input current increases, the hydraulic fluid port a pressure increases proportionally. Through the process, the proportional control of the output pressure of the pressure reducing valve is realized.
At this time, the armature 400 is in a force balance state, and the force balance equation is:
Wherein F s is the elasticity of the return spring; f e is electromagnetic force generated by the proportional electromagnet; p A is the pressure at the working oil port A; d is the diameter of the small-diameter end face of the armature 400; d is the diameter of the large-diameter end face of the magnetism isolating valve core 500.
The electromagnetic force F e generated by the proportional electromagnet and the input current i can be approximately in a direct proportional relation, and the following relation exists:
Fe＝k*i (2)
wherein k is the proportionality coefficient of the proportionality electromagnet, and the value of k is a positive value; i is the current input by the proportional electromagnet.
The pressure at the working port a is:
Since the compression amount Δχ 2 of the spring and the spring rate k s are small, the spring force of the spring can be approximated to a constant value. Therefore, as the input current i of the proportional electromagnet is continuously increased, the pressure p A at the working oil port A is proportionally increased, and proportional control of the output pressure is realized in the mode.
In summary, the embodiment of the invention provides a pressure reducing valve, in which the pressure reducing valve is in a first position state, the armature 400 is located at the rightmost side under the action of the driving component, the second inlet and outlet 120 is communicated with the third inlet and outlet 130, the first inlet and outlet 110 is in a closed state, at this time, the pressure at the third inlet and outlet 130 is minimum, the pressure at the third inlet and outlet 130 is equal to the pressure at the second inlet and outlet 120, when the driving component drives the armature 400 to move leftwards, the third inlet and outlet 130 is communicated with the first inlet and outlet 110, the second inlet and outlet 120 is in a closed state, at this time, the pressure at the third inlet and outlet 130 is increased under the action of the first inlet and outlet 110, and when the pressure at the third inlet and outlet 130 is increased to a certain extent, the armature 400 moves rightwards, under the combined action of oil pressure, elastic force and the driving component, the armature 400 reaches balance again at a new position, so that the proportion control of the output pressure of the pressure reducing valve is realized, the pressure reducing process can be realized inside the electromagnetic coil 800, the external valve core and the valve sleeve are omitted, and the valve sleeve are provided with higher integration degree.
In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "longitudinal", "X-axis direction", "Y-axis direction", "Z-axis direction", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (4)
1. A pressure relief valve, comprising:
the pole shoe is provided with a connecting end and a mounting end, the connecting end is provided with a first inlet and a second inlet and a third inlet and a fourth inlet and a fifth inlet and a sixth inlet, the fourth inlet and the fifth inlet are communicated with the first inlet and the second inlet, the fifth inlet and the fifth outlet are communicated with the second inlet and the sixth inlet and the third inlet and the sixth outlet are communicated with the third inlet and the third outlet;
The armature is provided with a seventh inlet and a eighth inlet and a seventh outlet which are mutually communicated, and the armature and the fifth inlet and the fifth outlet are oppositely arranged;
the elastic piece is arranged between the armature and the pole shoe and can drive the armature to move away from the pole shoe;
A drive assembly capable of driving the armature toward the pole piece and covering the fifth port;
The armature has a first position state and a second position state, when the armature is in the first position state, the elastic piece drives the armature to move in a direction away from the pole shoe and opens the fifth inlet and outlet, and the fifth inlet and outlet is communicated with the sixth inlet and outlet;
When the armature is in a second position state, the driving assembly drives the armature to move in a direction close to the pole shoe and cover the fifth inlet and outlet, the seventh inlet and outlet are communicated with the fourth inlet and outlet, and the eighth inlet and outlet are communicated with the sixth inlet and outlet;
the driving assembly comprises an electromagnetic coil, the electromagnetic coil is annularly arranged on the periphery of the armature, and the electromagnetic coil can drive the armature to move towards the pole shoe;
The pole shoe is provided with a mounting groove, the elastic piece is mounted in the mounting groove, the front end of the mounting groove is communicated with the fifth inlet and outlet, the rear end of the mounting groove is provided with a limiting groove, the caliber of the limiting groove is larger than that of the mounting groove, a limiting step is formed between the limiting groove and the mounting groove, the armature iron is slidably inserted in the limiting groove, and the diameter of the end part of the armature iron is larger than that of the notch of the mounting groove and smaller than that of the limiting groove;
the armature is provided with an overflow channel, the seventh inlet and outlet are communicated with the overflow channel when the armature is in a second position state, the bottom of the overflow channel is provided with the eighth inlet and outlet, and the eighth inlet and outlet are positioned above the sixth inlet and outlet when the armature is in a first position state;
the inner wall of the limit groove is provided with a magnetism isolating bush which is made of non-magnetic conductive materials, when the armature is in the first position state, the inner wall of the magnetism isolating bush is abutted against the outer wall of the armature, and the seventh inlet and outlet and the overflow channel are blocked;
a throttling groove is arranged at the periphery of the armature, and the seventh inlet and outlet are defined between the throttling groove and the magnetism isolating bush;
The pressure reducing valve further comprises a magnetism isolating valve core made of non-magnetic conducting materials, the magnetism isolating valve core is arranged at the front end of the armature, a reflux groove is formed in the magnetism isolating valve core, a passage for communicating the sixth inlet and the fifth outlet is formed between the reflux groove and the pole shoe, when the armature is in a second position state, the reflux groove is communicated with the sixth inlet and the fifth outlet, and when the armature is in a first position state, an overflow passage is formed among the outer wall of the magnetism isolating valve core, the inner wall of the pole shoe and the armature.
2. The pressure reducing valve according to claim 1, further comprising a limiting member, wherein the magnetism isolating valve core is provided with a through hole, the limiting member is inserted into the through hole of the magnetism isolating valve core, the limiting member is provided with a through hole penetrating through the limiting member, the limiting member is abutted with the elastic member, and the outer diameter of the limiting member is smaller than the caliber of the limiting groove.
3. The pressure reducing valve according to claim 1, further comprising a skeleton and a magnetically permeable ring, the skeleton being wrapped around the armature and wrapping around at least a mounting end of the pole piece, the magnetically permeable ring being disposed at a rear end of the armature, the magnetically permeable ring being made of a soft magnetic material.
4. A pressure relief valve as claimed in claim 3, further comprising a housing made of soft magnetic material, a front end of the housing having a mounting opening, the armature, pole piece, armature and magnetically permeable ring being mounted within the housing from the mounting opening, an inner wall of the housing being in interference fit with an outer wall of a connecting end of the pole piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210558726.1A CN114838162B (en) | 2022-05-20 | 2022-05-20 | Pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210558726.1A CN114838162B (en) | 2022-05-20 | 2022-05-20 | Pressure reducing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114838162A CN114838162A (en) | 2022-08-02 |
| CN114838162B true CN114838162B (en) | 2024-08-06 |
Family
ID=82572441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210558726.1A Active CN114838162B (en) | 2022-05-20 | 2022-05-20 | Pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114838162B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101625039A (en) * | 2009-08-10 | 2010-01-13 | 贵州红林机械有限公司 | Electromagnetic valve used for air separation control device |
| CN112984154A (en) * | 2021-03-30 | 2021-06-18 | 陕西华诚领航电磁科技有限责任公司 | Proportional pressure reducing electromagnetic valve with integrated stop iron and pole shoe and spherical piston structure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112984162A (en) * | 2021-03-30 | 2021-06-18 | 陕西华诚领航电磁科技有限责任公司 | Overflow type inverse proportion pressure reducing electromagnetic valve with unloading function of stop iron and pole shoe |
| CN112984160A (en) * | 2021-03-30 | 2021-06-18 | 陕西华诚领航电磁科技有限责任公司 | Overflow proportional pressure reducing solenoid valve with locking function of deep hole stop iron structure |
-
2022
- 2022-05-20 CN CN202210558726.1A patent/CN114838162B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101625039A (en) * | 2009-08-10 | 2010-01-13 | 贵州红林机械有限公司 | Electromagnetic valve used for air separation control device |
| CN112984154A (en) * | 2021-03-30 | 2021-06-18 | 陕西华诚领航电磁科技有限责任公司 | Proportional pressure reducing electromagnetic valve with integrated stop iron and pole shoe and spherical piston structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114838162A (en) | 2022-08-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8127791B2 (en) | Solenoid operated fluid control valve | |
| US4848721A (en) | Hydraulic valve with integrated solenoid | |
| US9441732B2 (en) | Regulator valve with integrated direct acting solenoid | |
| JPH08270824A (en) | Proportional variable-force electromagnetic fluid control valve and fluid controller for electronic transmission by said control valve | |
| US8141842B2 (en) | Solenoid valve | |
| US7992839B2 (en) | Electrohydraulic valve having a solenoid actuator plunger with an armature and a bushing | |
| JP2005140277A (en) | Three-way bleed type proportional solenoid valve | |
| JP4366835B2 (en) | solenoid valve | |
| CN114838162B (en) | Pressure reducing valve | |
| KR102344692B1 (en) | Solenoid | |
| JP4492649B2 (en) | Bleed valve device | |
| CN107725517B (en) | Proportional flow solenoid valve | |
| CN114838161A (en) | Pressure reducing valve | |
| US11948737B2 (en) | Solenoid | |
| CN106663517A (en) | Solenoid and solenoid valve | |
| CN213361262U (en) | Convenient-to-assemble electromagnetic valve with high control precision | |
| JP2013168425A (en) | Linear solenoid | |
| JPH084934A (en) | Solenoid valve for fluid control | |
| JP2005310838A (en) | Electromagnetic drive unit | |
| JP2021085469A (en) | Solenoid valve | |
| JP7383907B2 (en) | solenoid valve | |
| JP5768736B2 (en) | Linear solenoid | |
| JP2007100829A (en) | Valve device | |
| CN115539453A (en) | Low-pressure large-flow three-way proportional pressure reducing valve | |
| JP2007285360A (en) | Linear solenoid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |