CN111457127B - Two-dimensional pilot type electromagnetic cartridge valve - Google Patents
Two-dimensional pilot type electromagnetic cartridge valve Download PDFInfo
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- CN111457127B CN111457127B CN201910058443.9A CN201910058443A CN111457127B CN 111457127 B CN111457127 B CN 111457127B CN 201910058443 A CN201910058443 A CN 201910058443A CN 111457127 B CN111457127 B CN 111457127B
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- 238000007789 sealing Methods 0.000 claims description 21
- 230000033001 locomotion Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000009471 action Effects 0.000 description 11
- 230000004044 response Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
Classifications
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
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- 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
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- 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
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/40—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The two-dimensional pilot electromagnetic cartridge valve is characterized in that a torsion spring is arranged between a convex column of the shell and an armature, the armature is rotatably arranged in a stator, a valve sleeve is connected with the stator, and a valve core is axially movably arranged in the valve sleeve; the right side of the armature is a disc shape with uniformly distributed external teeth, the external teeth of the armature are matched with the internal teeth of the stator, the first oil guiding block and the second oil guiding block are inserted into a circular through hole of the disc, an oil guiding flow passage is axially arranged in the center of the first oil guiding block, and the stator flow passage is communicated with a first high-pressure hole of the valve sleeve through the oil guiding flow passage, the valve sleeve flow passage and the first annular groove; the armature is axially provided with a rectangular clamping groove, high-pressure grooves and low-pressure holes are alternately arranged, the left end of a first central flow passage in the center of the armature is communicated with the low-pressure hole on the right side of the disc, and the right end of the first central flow passage is communicated with the low-pressure through hole; the valve sleeve flow passage is communicated with the first annular groove and the oil guiding flow passage, the left end face of the valve sleeve is axially provided with a low-pressure flow passage communicated with the oil return port, the valve sleeve is sequentially provided with the first annular groove, the oil return port, the oil outlet and the radial through hole from left to right, and the right end face of the valve sleeve is provided with an oil inlet.
Description
Technical Field
The invention belongs to a hydraulic control element in the field of fluid transmission and control, and particularly relates to a two-dimensional pilot electromagnetic cartridge valve.
Background
In recent years, a two-dimensional electrohydraulic switching valve working by utilizing a servo screw mechanism principle has the advantages of double degrees of freedom of valve core rotation and axial movement, flexible control, high precision, quick frequency response, low hysteresis, small leakage quantity, simple structure and the like, and is mainly used in the fields of aerospace, hydraulic industry and the like at present.
In recent years, the technology of hydraulic cartridge valves is developed rapidly, the cartridge valves not only change the system structure of plate valves in connection mode, but also have simple structure and small occupied volume, and the problem of leakage outside the system is solved. Through wide adoption, cartridge valves gradually form a variety series, and have certain interchangeability. At present, an electromagnetic cartridge valve is a main type of cartridge valve, and the work requirement is met by directly pushing a valve core by an electromagnet to overcome the spring force, but the implementation mode is limited by the direct pushing electromagnet, so that the valve core has insufficient thrust, is sensitive to oil pollution, has larger power consumption of the electromagnet and the like.
Disclosure of Invention
In order to solve the problems that the electromagnetic cartridge valve in the current market is limited by the volume and the power consumption of an electromagnet, so that the thrust of a valve core is insufficient, particularly the valve core is difficult to work under a high-pressure working condition, is sensitive to oil pollution and the like, the invention provides a two-dimensional pilot type electromagnetic cartridge valve which uses a two-dimensional miniature integrated two-dimensional electromagnetic switch valve as a pilot valve to push the valve core to move.
The technical scheme adopted by the invention is as follows:
Two-dimensional guide formula electromagnetism cartridge valve, its characterized in that: the device comprises a shell, a torsion spring, a coil retainer, a stator, an armature, a first oil guiding block, a second oil guiding block, a valve sleeve, a valve core, a limiting ring, a bolt and the like. One end of the torsion spring is inserted into the clamping groove of the step surface of the convex column of the shell, and the other end of the torsion spring is inserted into the rectangular clamping groove at the left end of the armature; the coil is wound on the coil retainer and placed on the stator, and is inserted into the shell together and fixed, and the shell is connected with the stator through threads; one end of the first oil guiding block and one end of the second oil guiding block are respectively in interference connection with the circular clamping groove of the stator, and the other end of the first oil guiding block and the other end of the second oil guiding block are in interference connection with the circular mounting groove on the left end face of the valve sleeve; the armature is rotatably arranged in the stator, the left end face of the valve sleeve is fixedly connected with the square end face of the stator through a screw, the valve core is axially movably arranged in the valve sleeve, the limiting ring is fixedly connected in the stepped hole at the right end of the valve sleeve, and the bolt is inserted into the radial through holes of the valve sleeve and the limiting ring.
The shell is cylindrical, the shell is connected with the stator through threads, a convex column in the shell is in a step shape, and a torsion spring clamping groove is formed in the step surface of the right end of the convex column and used for fixing one end of a torsion spring.
The outside of the stator is in a stepped cylindrical shape, a first cylinder, a second cylinder and a third cylinder are sequentially arranged from left to right, the right side of the stator protrudes to form a square end face, the outer side of the first cylinder and the inner side of the shell provide installation spaces for the coil and the coil retainer, and a pair of axisymmetric straight grooves are formed in the inner wall of the first cylinder along the axial direction; the outer circle of the second cylinder is provided with threads, the stator is connected with the shell through the threads, the inner wall of the second cylinder is provided with an inclined hole serving as a stator runner, and the right end face is axially provided with a pair of axisymmetric circular clamping grooves; the inner circle of the third cylinder is provided with a plurality of uniformly distributed inner teeth; the square end face is connected with the left end face of the valve sleeve through a screw.
The right side of the armature is disc-shaped, a plurality of uniformly distributed external teeth are arranged on the outer circle of the disc, the number and the distribution state of the external teeth of the armature are identical to those of the internal teeth of the stator, the external teeth of the armature and the internal teeth of the stator are matched with each other, and magnetic conduction is conducted under the condition that a coil is electrified to generate circumferential tangential force, and the circumferential tangential force generates moment on the center of the armature to enable the armature to circumferentially rotate; four circular through holes which are symmetrically and uniformly distributed in the center are formed in the end face of the disc along the axial direction and are used for communicating oil liquid at two ends of the armature disc; the first oil guiding block and the second oil guiding block are inserted into the corresponding circular through holes and limit the armature to rotate by the maximum angle when the armature rotates, the center of the first oil guiding block is axially provided with an oil guiding flow passage, and the stator flow passage is communicated with the first high-pressure hole of the valve sleeve through the oil guiding flow passage, the valve sleeve flow passage and the first annular groove. The armature is provided with a ladder and is first ladder and second ladder in proper order from left to right, and first ladder surface is equipped with a rectangle draw-in groove, a pair of axisymmetric high-pressure groove and a pair of axisymmetric low-pressure hole along the axial, and high-pressure groove and low-pressure hole set up in turn, and the rectangle draw-in groove is inserted to one end of torsional spring is fixed, and armature center is equipped with first central runner along the axial, and the disc right side is equipped with a pair of axisymmetric low-pressure through-hole, first central runner left end and low-pressure hole communicate with each other, and the right-hand member communicates with the low-pressure through-hole.
The shell, the stator and the armature are made of magnetic conductive materials.
The left side of the valve pocket protrudes to be the rectangle terminal surface, and the rectangle terminal surface passes through the screw to be connected with the square terminal surface of stator, and valve pocket left end face is equipped with a pair of axisymmetric circular mounting groove along the axial, and the circular mounting groove bottom that corresponds to be connected with first oil guide piece is equipped with the inclined hole and is the valve pocket runner, and valve pocket runner communicates first ring channel and oil guide runner, and valve pocket left end face is equipped with a pair of low pressure runner with circular mounting groove circumference offset 90 degrees along the axial, and low pressure runner communicates with the oil return opening, and the valve pocket is equipped with first ring channel, oil return opening, oil-out, radial through-hole from a left side to the right side in proper order, and valve pocket right-hand member face is equipped with the oil inlet.
The valve core is provided with a first shoulder, a second shoulder, a third shoulder and a fourth shoulder which are arranged in sequence from left to right. A pair of axisymmetric first high-pressure holes are formed between the first shoulder and the second shoulder, four second high-pressure holes which are centrosymmetric and uniformly distributed are formed between the third shoulder and the fourth shoulder, a second central flow passage is axially formed in the center of the valve core, the second central flow passage is communicated with the first high-pressure holes and the second high-pressure holes, and the right end of the second central flow passage is communicated with the oil inlet.
An armature is rotatably disposed within the stator. The left end face of the armature and the convex column of the shell hermetically enclose the inner cavity of the stator into a sensitive cavity, and in the working process, the sensitive cavity is communicated with a high-pressure groove and a low-pressure hole of the armature alternately by the rotation of the armature. The first step and the second step of the armature air-tightly enclose the inner cavity of the stator into an annular high-pressure cavity. The annular high-pressure cavity is communicated with the first annular groove of the valve sleeve through the stator flow passage, the oil guiding flow passage, the valve sleeve flow passage and the first annular groove, the first annular groove is communicated with the oil inlet through the first high-pressure hole, the second central flow passage and the limiting ring, and the oil inlet is communicated with the high-pressure outlet of the hydraulic pump. The second step of the armature, the right end face of the second cylinder of the stator, the left end face of the valve sleeve and the valve core hermetically enclose the inner cavity of the stator into a low-pressure cavity, and the low-pressure cavity is communicated with the oil return port through a low-pressure flow channel. The valve core is axially movably arranged in the valve sleeve, the axis of the valve core and the axis of the armature are in the same straight line, the third shoulder and the fourth shoulder of the valve core hermetically enclose the inner cavity of the valve sleeve into a working cavity surrounding the valve core, and the working cavity is communicated with the oil inlet through the second high-pressure hole, the second central flow passage and the limiting ring. The oil outlet is positioned on the motion track of the third shoulder of the valve core, and in the working process, the axial displacement of the valve core enables the working cavity and the working port to be communicated and closed alternately. The right end of the armature is contacted with the left end of the valve core.
The outlet end of the straight slot of the stator is communicated with the sensitive cavity, the inlet end of the straight slot is positioned on the motion track of the outlet end of the high-pressure slot of the armature and the motion track of the outlet end of the low-pressure hole, and the slot width of the straight slot is equal to the distance between the high-pressure slot and the low-pressure hole; the inlet end of the high-pressure groove of the armature is communicated with an annular high-pressure cavity, the annular high-pressure cavity is communicated with the oil inlet through a stator runner, an oil guiding runner, a valve sleeve runner, a first annular groove, a first high-pressure hole, a second central runner and a limiting ring so as to input high-pressure oil into the annular high-pressure cavity, and the sensitive cavity is communicated with the annular high-pressure cavity through a straight groove and a high-pressure groove so as to input high-pressure oil into the sensitive cavity; the low pressure hole of the armature is communicated with the oil return port through the first central flow passage, the low pressure through hole and the low pressure flow passage so as to input low pressure oil into the low pressure hole, and the sensitive cavity is communicated with the low pressure hole through the straight slot so as to input low pressure oil into the sensitive cavity.
Preferably, the right end spherical surface of the armature is in point contact with the left end surface of the valve core, and the right end spherical surface of the convex column of the shell is in point contact with the left end surface of the armature, so that friction resistance moment when the armature rotates can be reduced, the armature is ensured to be only acted by hydraulic clamping force in the rotating process, and response speed is greatly improved.
Preferably, a first sealing ring is arranged at the annular groove at the bottom of the convex column of the shell and used for sealing the left side of the sensitive cavity, a second sealing ring is arranged between the outer annular circle at the left side of the valve sleeve and the inner wall at the right end of the stator and used for sealing the right side of the low-pressure cavity, and a third sealing ring and a fourth sealing ring are correspondingly sleeved at two ends of the first oil guiding block respectively and used for sealing the oil guiding flow passage and the low-pressure cavity.
The axial direction refers to the direction of the central axes of the armature and the valve core; the radial direction refers to the direction perpendicular to the central shaft in the radial plane of the armature and the valve core; the circumferential direction refers to the direction in which the armature and the valve core rotate around the central shaft.
The center of symmetry of the armature and the valve core and the symmetrical center of the axially symmetrical grooves and holes refers to the central axis of the armature and the valve core.
The specific working process is as follows:
when the electric signal is not received, the coil is set to the initial position and is not energized. Under the action of the pretightening force of the torsion spring, the armature high-pressure groove is communicated with the oil inlet through the annular high-pressure cavity, the stator flow passage, the oil guiding flow passage, the valve sleeve first annular groove and the valve core first high pressure Kong Changtong, the valve core first high-pressure hole is communicated with the oil inlet through the second central flow passage and the limiting ring, the armature high-pressure groove is communicated with the stator straight groove, the sensitive cavity is filled with high-pressure oil, the low-pressure hole of the armature is communicated with the oil return port through the first central flow passage, the low-pressure through hole, the low-pressure cavity, the low-pressure flow passage and the oil return port, the armature low-pressure hole is not communicated with the stator straight groove, the sensitive cavity is high pressure at the moment, the left end surface area of the armature is larger than the right end surface area of the valve core and the pressure of the sensitive cavity is equal to the pressure of the P port, the axial rightward force acting on the left end surface of the armature is larger than the axial leftward force acting on the right end surface of the valve core, under the action of axial resultant force, the armature moves right to the rightmost end synchronously with the valve core, the right end of the valve core is contacted with the limiting ring, the displacement is limited, at the moment, the left side of the third shoulder of the valve core is open with the oil outlet, the right side of the third shoulder of the valve core seals the working cavity and the oil outlet, oil at the oil outlet flows into the oil return port, the first high-pressure hole of the valve core is communicated with the first annular groove of the valve sleeve and the valve sleeve runner, and is not communicated with other cavities, the second shoulder of the valve core seals the first annular groove of the valve sleeve with the oil return port, the first shoulder of the valve core seals the first annular groove of the valve sleeve with the low-pressure cavity, namely the oil outlet is communicated with the oil return port, and the oil outlet is blocked with the oil inlet.
When an electric signal is accessed, the coil is electrified, the right disc of the armature generates moment to the armature by tangential force, after the armature rotates a certain angle in the circumferential direction under the action of the moment, a pair of round holes on the armature disc are respectively contacted with one side of the outer walls of the first oil guiding block and the second oil guiding block, the rotation is limited, and the armature is screwed into the torsion spring; the high-pressure groove of the armature is not communicated with the stator straight groove any more, the low-pressure hole of the armature is communicated with the oil return port through the first central flow passage, the low-pressure through hole, the low-pressure cavity and the low-pressure flow passage, the sensitive cavity is communicated with the armature low-pressure hole through the stator straight groove, the sensitive cavity is low pressure, the right end face of the valve core is still high pressure, the axial right force acting on the left end face of the armature is smaller than the axial left force acting on the right end face of the valve core, the armature moves left to the leftmost end synchronously under the action of axial resultant force until the armature contacts with the right end of the shell boss, the displacement is limited, the left side of the valve core is sealed and separated from the oil outlet at the moment, the right side of the third shoulder of the valve core is open with the oil outlet, the second high-pressure hole of the valve core is communicated with the oil outlet, and the oil in the oil inlet flows into the oil outlet through the second high-pressure hole, namely the oil inlet is communicated with the oil outlet and the oil outlet is blocked with the oil return port.
When the electric signal is disconnected, the coil is powered off, the armature reversely rotates circumferentially under the action of the torsion spring until a pair of round holes on the disc on the right side of the armature are respectively contacted with the other sides of the outer walls of the first oil guiding block and the second oil guiding block, the rotation is limited, high-pressure oil is fed into the sensitive cavity again, the axial rightward acting force of the left end of the armature is larger than the axial leftward acting force of the right end of the valve core, the armature and the valve core synchronously move rightward until reaching the rightmost end, the armature is at an initial position again at the moment, and the communication states of all oil ports and cavities are consistent with the positions of the armature and the valve core. At this time, the electromagnetic switch valve is switched once, and the above operation is repeated, so that the switch valve can continuously work.
The beneficial effects of the invention are as follows:
1. compared with the traditional electromagnetic cartridge valve, the 2D miniature pilot valve is adopted, and the electromagnet needs to be opened with small current;
2. the valve core is driven to be hydraulic driving force, the driving force is large, and the valve opening can be opened and closed under the high-pressure working condition;
3. The requirements on the oil liquid filtering precision are low, and the pollution resistance is strong;
4. Compared with other 2D switch valves, the wet pilot-stage electromagnet is adopted, and zero setting requirements are avoided.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a cross-sectional view of the present invention.
Fig. 2a is a cross-sectional view of F-F of fig. 2.
Fig. 3 is a schematic structural view of the housing.
Fig. 4 is a schematic structural view of a stator.
Fig. 5 is a schematic illustration of the structure of the armature.
Fig. 5a is a cross-sectional view of the armature.
Fig. 6 is a schematic structural view of the valve sleeve.
Fig. 6a is a sectional view H-H of fig. 6.
Fig. 7 is a schematic structural view of the valve core.
Fig. 7a is a sectional view of G-G of fig. 7.
Fig. 8a is a schematic diagram of the principle of the low pressure of the sensing chamber.
Fig. 8b is a schematic diagram of the principle of high pressure passing through the sensing chamber.
Detailed Description
The technical solution of the present invention is further described below with reference to fig. 1 to 8 b.
The two-dimensional pilot type electromagnetic cartridge valve is characterized in that: the device comprises a shell 1, a torsion spring 3, a coil 4, a coil retainer 5, a stator 6, an armature 7, a first oil guiding block 9, a second oil guiding block 10, a valve sleeve 13, a valve core 14, a limiting ring 15, a plug pin 16 and the like. One end of the torsion spring 3 is inserted into a clamping groove 101 of the convex column step surface of the shell 1, and the other end is inserted into a rectangular clamping groove 71 at the left end of the armature 7; the coil 4 is wound on the coil retainer 5 and placed on the stator 6, and is inserted into the housing 1 together and fixed, and the housing 1 is connected with the stator 6 through threads; one end of the first oil guiding block 9 and one end of the second oil guiding block 10 are respectively in interference connection with the circular clamping grooves 61 and 62 of the stator 6, and the other end of the first oil guiding block is in interference connection with the circular mounting grooves 131 and 132 on the left end face of the valve sleeve 13; the armature 7 is rotatably arranged in the stator 6, the left end face of the valve sleeve 13 is fixedly connected with the square end face of the stator 6 through a screw, the valve core 14 is axially movably arranged in the valve sleeve 13, the limiting ring 15 is fixedly connected in a stepped hole at the right end of the valve sleeve 13, and the bolt 16 is inserted into radial through holes of the valve sleeve 13 and the limiting ring 15.
The shell 1 is cylindrical, the shell 1 is connected with the stator 6 through threads, a convex column in the shell 1 is in a step shape, and a torsion spring clamping groove 101 is formed in the step surface of the right end of the convex column and used for fixing one end of the torsion spring 3.
The stator 6 is a stepped cylinder, a first cylinder 63, a second cylinder 64 and a third cylinder 65 are sequentially arranged from left to right, the right side of the stator protrudes to form a square end surface, the outer side of the first cylinder 63 and the inner side of the shell 1 provide installation spaces for the coil 4 and the coil retainer 5, and a pair of axisymmetric straight grooves k are formed in the inner wall of the first cylinder 63 along the axial direction; the outer circle of the second cylinder 64 is provided with threads, the stator 6 is connected with the shell 1 through the threads, the inner wall of the second cylinder 64 is provided with inclined holes serving as stator flow channels b, and the right end face is axially provided with a pair of axisymmetric circular clamping grooves 61 and 62; the inner circle of the third cylinder 65 is provided with a plurality of uniformly distributed inner teeth; the square end face is connected with the left end face of the valve sleeve 13 through a screw.
The right side of the armature 7 is disc-shaped, a plurality of uniformly distributed external teeth are arranged on the outer circle of the disc 72, the number of the external teeth of the armature 7 is the same as that of the internal teeth of the stator 6, the distribution state of the external teeth of the armature 7 is consistent with that of the internal teeth of the stator 6, the external teeth of the armature 7 and the internal teeth of the stator 6 are matched with each other, and magnetic conduction generates circumferential tangential force under the condition that the coil 4 is electrified, and the circumferential tangential force generates moment on the center of the armature 6 to enable the armature 6 to circumferentially rotate; four circular through holes which are symmetrically and uniformly distributed in the center are formed in the end face of the disc 72 along the axial direction and are used for communicating oil at two ends of the armature disc 72; the first oil guiding block 9 and the second oil guiding block 10 are inserted into the corresponding circular through holes and limit the maximum rotation angle of the armature 7 when the armature 7 rotates, an oil guiding flow passage c is axially arranged in the center of the first oil guiding block 9, and the stator flow passage b is communicated with the valve sleeve first high-pressure hole g through the oil guiding flow passage c, the valve sleeve flow passage e, the first annular groove 133. The armature 7 is provided with a first ladder 73 and a second ladder 74 which are arranged in sequence from left to right, the surface of the first ladder 73 is provided with a rectangular clamping groove 71, a pair of axisymmetric high-pressure grooves p and a pair of axisymmetric low-pressure holes t along the axial direction, the high-pressure grooves p and the low-pressure holes t are alternately arranged, one end of the torsion spring 3 is inserted into the rectangular clamping groove 71 to be fixed, the center of the armature 7 is provided with a first central flow passage a along the axial direction, the right side of the disc 72 is provided with a pair of axisymmetric low-pressure through holes d, the left end of the first central flow passage a is communicated with the low-pressure holes t, and the right end of the first central flow passage a is communicated with the low-pressure through holes d.
The shell 1, the stator 6 and the armature 7 are made of magnetic conductive materials.
The left side of the valve sleeve 13 protrudes to be a rectangular end face, the rectangular end face is connected with the square end face of the stator 6 through a screw, a pair of axisymmetric circular mounting grooves 131 and 132 are formed in the left end face of the valve sleeve 13 along the axial direction, inclined holes serving as valve sleeve flow channels e are formed in the bottoms of the circular mounting grooves 131 correspondingly connected with the first oil guiding block 9, the valve sleeve flow channels e communicate the first annular grooves 133 with the oil guiding flow channels c, a pair of low-pressure flow channels f which are staggered by 90 degrees from the circular mounting grooves along the circumferential direction are formed in the left end face of the valve sleeve 13 along the axial direction, the low-pressure flow channels f communicate with an oil return port T, a first annular groove 133, the oil return port T, an oil outlet A and a radial through hole are sequentially formed in the left-to-right direction of the valve sleeve, and an oil inlet P is formed in the right end face of the valve sleeve 13.
The spool 14 is provided with a first land 141, a second land 142, a third land 143 and a fourth land 144 which are arranged in sequence from left to right. A pair of axisymmetric first high-pressure holes g are formed between the first shoulder 141 and the second shoulder 142, four axisymmetric second high-pressure holes i are formed between the third shoulder 143 and the fourth shoulder 144, a second central flow passage h is axially formed in the center of the valve core 14, the second central flow passage h is communicated with the first high-pressure holes g and the second high-pressure holes i, and the right end of the second central flow passage h is communicated with the oil inlet P.
An armature 7 is rotatably disposed within the stator 6. The left end face of the armature 7 and the convex column of the shell 1 hermetically enclose the inner cavity of the stator 6 into a sensitive cavity K, and in the working process, the sensitive cavity K is communicated with a high-pressure groove p and a low-pressure hole t of the armature 7 alternately by rotation of the armature 7. The first step 73 and the second step 74 of the armature 7 hermetically enclose the inner cavity of the stator 6 into an annular high-pressure cavity B. The annular high-pressure cavity B is communicated with the first annular groove 133 of the valve sleeve 13 through the stator flow passage B, the oil guiding flow passage c and the valve sleeve flow passage e, the first annular groove 133 is communicated with the oil inlet P through the first high-pressure hole g, the second central flow passage h and the limiting ring 15, and the oil inlet P is communicated with a high-pressure outlet of the hydraulic pump. The second step 74 of the armature 7, the right end face of the second cylinder 64 of the stator 6, the valve sleeve 13 and the left end face of the valve core 14 hermetically enclose the inner cavity of the stator 6 into a low-pressure cavity C, and the low-pressure cavity C is communicated with the oil return port T through a low-pressure flow channel f. The valve core 14 is movably arranged in the valve sleeve 13, the axis of the valve core 13 and the axis of the armature 7 are positioned on the same straight line, the third shoulder 143 and the fourth shoulder 144 of the valve core 14 hermetically enclose the inner cavity of the valve sleeve 14 into a working cavity E surrounding the valve core, and the working cavity E is communicated with the oil inlet P through the second high-pressure hole i, the second central flow channel h and the limiting ring 15. The oil outlet A is positioned on the movement track of the third shoulder 143 of the valve core 14, and during the working process, the axial displacement of the valve core 14 enables the working cavity E and the working port A to be communicated and closed alternately.
The outlet end of a straight slot K of the stator 6 is communicated with the sensitive cavity K, the inlet end of the straight slot K is positioned on the motion track of the outlet end of a high-pressure slot p of the armature 7 and the motion track of the outlet end of a low-pressure hole t, and the slot width of the straight slot K is equal to the distance between the high-pressure slot p and the low-pressure hole t; the inlet end of a high-pressure groove P of the armature 7 is communicated with an annular high-pressure cavity B, the annular high-pressure cavity B is communicated with an oil inlet P through a stator flow passage B, an oil guiding flow passage c, a valve sleeve flow passage e, a first annular groove 133, a first high-pressure hole g, a second central flow passage h and a limiting ring 15 so as to input high-pressure oil into the annular high-pressure cavity B, and a sensitive cavity K is communicated with the annular high-pressure cavity B through a straight groove K and the high-pressure groove P so as to input high-pressure oil into the sensitive cavity K; the low-pressure hole T of the armature 7 is communicated with the oil return port T through the first central flow passage a, the low-pressure through hole d and the low-pressure flow passage f to input low-pressure oil into the low-pressure hole T, and the sensitive cavity K is communicated with the low-pressure hole T through the straight groove K to input low-pressure oil into the sensitive cavity K.
Preferably, the right end spherical surface of the armature 7 is in point contact with the left end surface of the valve core 14, and the right end spherical surface of the convex column of the shell 1 is in point contact with the left end surface of the armature 7, so that friction resistance data when the armature 7 rotates can be reduced, the armature 7 is ensured to be only acted by hydraulic clamping force in the rotating process, and the response speed is greatly improved.
Preferably, a first sealing ring 2 is installed at the annular groove at the bottom of the convex column of the shell 1 and is used for sealing the left side of the sensitive cavity K, a second sealing ring 11 is installed between the outer annular circle at the left side of the valve sleeve 13 and the inner wall at the right end of the stator 6 and is used for sealing the right side of the low-pressure cavity C, and a third sealing ring 8 and a fourth sealing ring 12 are respectively sleeved at two ends of the first oil guiding block 9 correspondingly and are used for sealing the oil guiding flow channel C and the low-pressure cavity C.
The axial direction refers to the direction of the central axes of the armature 7 and the valve core 14; the radial direction refers to the direction perpendicular to the central shaft in the radial plane of the armature 7 and the valve core 14; the circumferential direction refers to the direction in which the armature 7 and the valve element 14 rotate around the central axis.
The center of symmetry of the armature 7 and the center of each groove and hole of the valve core 14 refers to the central axis of the armature 7 and the valve core 14.
The working principle of the embodiment is as follows:
When the electric signal is not inputted, the coil 4 is set to the initial position and is not energized. Under the action of the pretightening force of the torsion spring 3, the armature 7 high-pressure groove P is normally communicated with the first high-pressure hole g of the valve core 14 through the annular high-pressure cavity B, the stator flow passage B, the oil guiding flow passage C, the valve sleeve flow passage e, the first annular groove 133, the first high-pressure hole g of the valve core 14 is communicated with the oil inlet P through the second central flow passage h and the limiting ring 15, the armature 7 high-pressure groove P is communicated with the stator 6 straight groove K, the sensitive cavity K is filled with high-pressure oil, the low-pressure hole T of the armature 7 is normally communicated with the oil return opening T through the first central flow passage a, the low-pressure through hole d, the low-pressure cavity C and the low-pressure flow passage f, and the armature 7 low-pressure hole T is not communicated with the stator 6 straight groove K, and the sensitive cavity K is high-pressure.
The area of the left end face of the armature 7 is larger than the area of the right end face of the valve core 14, the pressure of the sensitive cavity is equal to the pressure of the P port, the force acting on the left end face of the armature 7 in the axial right direction is larger than the force acting on the right end face of the valve core 14 in the axial left direction, the armature 7 moves right to the right side until the right end is reached under the action of the axial resultant force, the right end of the valve core 14 contacts with the limiting ring 15, the displacement is limited, at the moment, the left side of a third land 143 of the valve core 14 is open with an oil outlet A, the right side of the third land 143 of the valve core 14 seals a working cavity E from the oil outlet A, oil of the oil outlet A flows into an oil return port T, a first high-pressure hole g of the valve core 14 is communicated with a first annular groove 133 of the valve sleeve 13, a valve sleeve E is communicated with other cavities in a normal way, the first annular groove 133 of the valve sleeve 13 is not communicated with the oil return port T under the action of the axial resultant force, the first land 141 of the valve core 14 seals the first annular groove 133 with the low-pressure cavity C not communicated with the oil outlet, namely the working cavity A is communicated with the oil outlet A and the oil inlet P is blocked.
When an electric signal is accessed, the coil 4 is electrified, the disc 72 on the right side of the armature 7 generates moment to the armature 7 by tangential force, after the armature 7 rotates circumferentially for a certain angle under the action of the moment, a pair of round holes on the disc 72 are respectively contacted with one side of the outer walls of the first oil guiding block 9 and the second oil guiding block 10, the rotation is limited, and the armature 7 is screwed on the torsion spring 3; the high-pressure groove P of the armature 7 is not communicated with the straight groove K of the stator 6 any more, the low-pressure hole T of the armature 7 is communicated with the oil return port T through the first central flow passage a, the low-pressure through hole d, the low-pressure cavity C and the low-pressure flow passage f, the sensitive cavity K is communicated with the low-pressure hole T of the armature 7 through the straight groove K of the stator 6, the sensitive cavity K is low pressure at the moment, the right end face of the valve core 14 is still high pressure, the axial rightward force acting on the left end face of the armature 7 is smaller than the axial leftward force acting on the right end face of the valve core 14, the armature 7 and the valve core 14 synchronously move leftmost under the action of axial resultant force until the leftmost end is reached, the left end of the armature 7 is contacted with the right end of the protruding column of the shell 1, the displacement is limited at the moment, the left side of the third shoulder 143 of the valve core 14 is sealed with the oil outlet A, the right side of the third shoulder 143 of the valve core 14 is open, the second high-pressure hole i is communicated with the oil outlet A, the oil inlet P flows into the oil outlet A through the second high-pressure hole i, namely the oil inlet P is communicated with the oil outlet A, and the oil outlet A is blocked with the oil return port T.
When the electric signal is disconnected, the coil 4 is powered off, the armature 7 reversely rotates circumferentially under the action of the torsion spring force 3 until a pair of round holes on the disc 72 on the right side of the armature 7 are respectively contacted with the other sides of the outer walls of the first oil guiding block 9 and the second oil guiding block 10, high-pressure oil is fed into the sensitive cavity K again after rotation is limited, the left-end axial rightward acting force of the armature 7 is larger than the right-end axial leftward acting force of the valve core 14, the armature 7 and the valve core 14 synchronously move rightward until the rightmost end, and at the moment, the armature 7 and the valve core are positioned at the initial position again, and the communication states of all oil ports and all cavities are consistent with the positions of the armature 7 and the valve core 14. At this time, the electromagnetic switch valve is switched once, and the above operation is repeated, so that the switch valve can continuously work.
The embodiments described in the present specification are merely examples of implementation forms of the inventive concept, and the scope of protection of the present invention should not be construed as being limited to the specific forms set forth in the embodiments, and the scope of protection of the present invention and equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.
Claims (3)
1. Two-dimensional guide formula electromagnetism cartridge valve, its characterized in that: the device comprises a shell, a torsion spring, a coil retainer, a stator, an armature, a first oil guiding block, a second oil guiding block, a valve sleeve, a valve core, a limiting ring and a bolt; one end of the torsion spring is inserted into the clamping groove of the step surface of the convex column of the shell, and the other end of the torsion spring is inserted into the rectangular clamping groove at the left end of the armature; the coil is wound on the coil retainer and placed on the stator, and is inserted into the shell together and fixed, and the shell is connected with the stator through threads; one end of the first oil guiding block and one end of the second oil guiding block are respectively in interference connection with the circular clamping groove of the stator, and the other end of the first oil guiding block and the other end of the second oil guiding block are in interference connection with the circular mounting groove on the left end face of the valve sleeve; the armature is rotatably arranged in the stator, the left end face of the valve sleeve is fixedly connected with the square end face of the stator through a screw, the valve core is axially movably arranged in the valve sleeve, the limiting ring is fixedly connected in the stepped hole at the right end of the valve sleeve, and the bolt is inserted into the radial through holes of the valve sleeve and the limiting ring;
The shell is cylindrical, the shell is connected with the stator through threads, a convex column in the shell is in a step shape, and a torsion spring clamping groove is formed in the step surface at the right end of the convex column and used for fixing one end of a torsion spring;
The outside of the stator is in a stepped cylindrical shape, a first cylinder, a second cylinder and a third cylinder are sequentially arranged from left to right, the right side of the stator protrudes to form a square end face, the outer side of the first cylinder and the inner side of the shell provide installation spaces for the coil and the coil retainer, and a pair of axisymmetric straight grooves are formed in the inner wall of the first cylinder along the axial direction; the outer circle of the second cylinder is provided with threads, the stator is connected with the shell through the threads, the inner wall of the second cylinder is provided with an inclined hole serving as a stator runner, and the right end face is axially provided with a pair of axisymmetric circular clamping grooves; the inner circle of the third cylinder is provided with a plurality of uniformly distributed inner teeth; the square end face is connected with the left end face of the valve sleeve through a screw;
The right side of the armature is disc-shaped, a plurality of uniformly distributed external teeth are arranged on the outer circle of the disc, the number and the distribution state of the external teeth of the armature are identical to those of the internal teeth of the stator, the external teeth of the armature and the internal teeth of the stator are matched with each other, and magnetic conduction is conducted under the condition that a coil is electrified to generate circumferential tangential force, and the circumferential tangential force generates moment on the center of the armature to enable the armature to circumferentially rotate; four circular through holes which are symmetrically and uniformly distributed in the center are formed in the end face of the disc along the axial direction and are used for communicating oil liquid at two ends of the armature disc; the first oil guiding block and the second oil guiding block are inserted into the corresponding circular through holes and limit the armature to rotate by the maximum angle when the armature rotates, the center of the first oil guiding block is axially provided with an oil guiding flow passage, and the stator flow passage is communicated with the first high-pressure hole of the valve sleeve through the oil guiding flow passage, the valve sleeve flow passage and the first annular groove; the armature is provided with a first ladder and a second ladder from left to right in sequence, the surface of the first ladder is axially provided with a rectangular clamping groove, a pair of axisymmetric high-pressure grooves and a pair of axisymmetric low-pressure holes, the high-pressure grooves and the low-pressure holes are alternately arranged, one end of the torsion spring is inserted into the rectangular clamping groove to be fixed, the center of the armature is axially provided with a first central flow passage, the right side of the disc is provided with a pair of axisymmetric low-pressure through holes, the left end of the first central flow passage is communicated with the low-pressure holes, and the right end of the first central flow passage is communicated with the low-pressure through holes;
The shell, the stator and the armature are made of magnetic conductive materials;
The left side of the valve sleeve protrudes to form a rectangular end face, the rectangular end face is connected with a square end face of the stator through a screw, a pair of axisymmetric circular mounting grooves are formed in the left end face of the valve sleeve along the axial direction, inclined holes serving as valve sleeve flow channels are formed in the bottoms of the circular mounting grooves which are correspondingly connected with the first oil guiding blocks, the valve sleeve flow channels are communicated with the first annular grooves and the oil guiding flow channels, a pair of low-pressure flow channels which are staggered by 90 degrees from the circular mounting grooves along the circumferential direction are formed in the left end face of the valve sleeve along the axial direction, the low-pressure flow channels are communicated with the oil return openings, the valve sleeve is sequentially provided with the first annular grooves, the oil return openings, the oil outlets and radial through holes from left to right, and the right end face of the valve sleeve is provided with an oil inlet;
The valve core is provided with a first shoulder, a second shoulder, a third shoulder and a fourth shoulder which are arranged in sequence from left to right; a pair of axisymmetric first high-pressure holes are formed between the first shoulder and the second shoulder, four second high-pressure holes which are centrally symmetric and uniformly distributed are formed between the third shoulder and the fourth shoulder, a second central flow passage is axially formed in the center of the valve core, the second central flow passage is communicated with the first high-pressure holes and the second high-pressure holes, and the right end of the second central flow passage is communicated with the oil inlet;
The armature is rotatably arranged in the stator; the left end face of the armature and the convex column of the shell hermetically enclose the inner cavity of the stator into a sensitive cavity, and in the working process, the sensitive cavity is communicated with a high-pressure groove and a low-pressure hole of the armature alternately by the rotation of the armature; the first step and the second step of the armature hermetically enclose the inner cavity of the stator into an annular high-pressure cavity; the annular high-pressure cavity is communicated with the first annular groove of the valve sleeve through the stator flow passage, the oil guiding flow passage, the valve sleeve flow passage and the first annular groove of the valve sleeve, the first annular groove is communicated with the oil inlet through the first high-pressure hole, the second central flow passage and the limiting ring, and the oil inlet is communicated with the high-pressure outlet of the hydraulic pump; the second step of the armature, the right end face of the second cylinder of the stator, the left end face of the valve sleeve and the valve core hermetically enclose the inner cavity of the stator into a low-pressure cavity, and the low-pressure cavity is communicated with the oil return port through a low-pressure flow channel; the valve core is movably arranged in the valve sleeve, the axis of the valve core and the axis of the armature are positioned on the same straight line, the third shoulder and the fourth shoulder of the valve core hermetically enclose the inner cavity of the valve sleeve into a working cavity surrounding the valve core, and the working cavity is communicated with the oil inlet through the second high-pressure hole, the second central flow passage and the limiting ring; the oil outlet is positioned on the motion track of the third shoulder of the valve core, and in the working process, the axial displacement of the valve core enables the working cavity and the working port to be communicated and closed alternately; the right end of the armature is contacted with the left end of the valve core;
The outlet end of the straight slot of the stator is communicated with the sensitive cavity, the inlet end of the straight slot is positioned on the motion track of the outlet end of the high-pressure slot of the armature and the motion track of the outlet end of the low-pressure hole, and the slot width of the straight slot is equal to the distance between the high-pressure slot and the low-pressure hole; the inlet end of the high-pressure groove of the armature is communicated with an annular high-pressure cavity, the annular high-pressure cavity is communicated with the oil inlet through a stator runner, an oil guiding runner, a valve sleeve runner, a first annular groove, a first high-pressure hole, a second central runner and a limiting ring so as to input high-pressure oil into the annular high-pressure cavity, and the sensitive cavity is communicated with the annular high-pressure cavity through a straight groove and a high-pressure groove so as to input high-pressure oil into the sensitive cavity; the low-pressure hole of the armature is communicated with the oil return port through the first central flow passage, the low-pressure through hole and the low-pressure flow passage so as to input low-pressure oil into the low-pressure hole, and the sensitive cavity is communicated with the low-pressure hole through the straight slot so as to input low-pressure oil into the sensitive cavity;
The area of the left end face of the armature is larger than that of the right end face of the valve core.
2. The two-dimensional pilot-operated electromagnetic cartridge valve of claim 1, wherein: the right end spherical surface of the armature is in point contact with the left end surface of the valve core, and the right end spherical surface of the convex column of the shell is in point contact with the left end surface of the armature.
3. The two-dimensional pilot-operated electromagnetic cartridge valve of claim 1 or 2, wherein: the first sealing ring is arranged at the annular groove at the bottom of the convex column of the shell and used for sealing the left side of the sensitive cavity, the second sealing ring is arranged between the outer ring at the left side of the valve sleeve and the inner wall at the right end of the stator and used for sealing the right side of the low-pressure cavity, and the third sealing ring and the fourth sealing ring are respectively sleeved at two ends of the first oil guiding block and used for sealing the oil guiding flow passage and the low-pressure cavity.
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| CN114542969A (en) * | 2020-11-26 | 2022-05-27 | 未势能源科技有限公司 | Electromagnetic valve of high-pressure cylinder valve and high-pressure cylinder valve |
| CN115750902B (en) * | 2022-11-29 | 2023-06-09 | 富阳通力机械制造有限公司 | Two-dimensional electro-hydraulic proportional valve manual unloading structure for quick self-locking jack |
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