CN116838661A - Zero-transmission full-bridge two-dimensional electro-hydraulic proportional reversing valve - Google Patents
Zero-transmission full-bridge two-dimensional electro-hydraulic proportional reversing valve Download PDFInfo
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- CN116838661A CN116838661A CN202310769501.5A CN202310769501A CN116838661A CN 116838661 A CN116838661 A CN 116838661A CN 202310769501 A CN202310769501 A CN 202310769501A CN 116838661 A CN116838661 A CN 116838661A
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- 238000004804 winding Methods 0.000 claims abstract description 19
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 34
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- 230000003068 static effect Effects 0.000 abstract description 6
- 230000009347 mechanical transmission Effects 0.000 abstract description 3
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- 238000013016 damping Methods 0.000 description 15
- 230000002829 reductive effect Effects 0.000 description 10
- 239000003921 oil Substances 0.000 description 6
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- 238000005299 abrasion Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
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- 238000005516 engineering process Methods 0.000 description 3
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- 230000009351 contact transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
Abstract
The invention provides a zero-transmission full-bridge two-dimensional electro-hydraulic proportional reversing valve, which comprises: a valve body and an electromagnetic driving device embedded in the middle of the valve body; the valve body includes: the valve core and the valve sleeve are coaxially sleeved outside the valve core, and the valve core and the valve sleeve can slide and rotate relatively; the valve body is coaxially sleeved outside the valve sleeve; the electromagnetic drive apparatus includes: the rotor is coaxially sleeved on a rotor mounting groove of the valve core, realizes rotor positioning through matching with the rotor mounting groove, and can slide and rotate relative to the valve sleeve along with the valve core; the stator winding is coaxially sleeved on the surface of the valve sleeve; and the magnetic conduction sheet is embedded into the magnetic conduction sheet mounting groove on the outer surface of the valve sleeve and is used for transmitting the magnetic force of the stator winding. The invention solves the technical problems that the transmission device of the traditional two-dimensional electro-hydraulic proportional reversing valve in the prior art is complex, and the inherent clearance and friction wear in the mechanical transmission process affect the linearity, the repeatability, the hysteresis loop and other static characteristics.
Description
Technical Field
The invention relates to a flow and reversing control valve for an electro-hydraulic proportional control technology in the technical field of fluid transmission and control, in particular to a zero-transmission full-bridge two-dimensional electro-hydraulic proportional reversing valve.
Background
During the world war ii, the breakthrough development of jet aircraft technology has put higher demands on the rapid performance, dynamic accuracy and power-to-weight ratio of the control systems employed, whereby electrohydraulic control technologies have been pushed and developed. In 1940, electrohydraulic servo systems were first used in aircraft. In the later 1950 s, electrohydraulic servo valves with nozzle baffle valves as the pilot stage of the electrohydraulic servo valves are developed, so that the electrohydraulic servo valves become servo systems with the fastest response and highest control precision at the moment. In 1967, the earliest proportioning valve KL in the world was produced by the Swiss Buringer company which produced the proportioning directional throttle valve for use in the hull surface rust removal painting process. The Japanese oil research company develops a proportional pressure valve and a proportional flow valve in 1971 and 1972 in sequence, and the rapid development of the electro-hydraulic proportional valve is promoted. In modern society, because electrohydraulic servo system possesses electric and hydraulic advantages at the same time, namely quick response, high control precision, compact structure and large output power, it is applied in large-scale electromechanical equipment, such as large-scale forging press, die casting machine, hydraulic press, friction welder, military load simulator, etc., and plays an extremely critical role in the development process of industrial equipment.
The electro-hydraulic proportional valve is a component which generates corresponding action according to an input voltage signal by a proportional electromagnet in the valve to enable a valve core of a working valve to generate displacement, and the size of a valve port is changed to finish pressure and flow output in proportion to the input voltage. The spool displacement may also be fed back mechanically, hydraulically or electrically. The electro-hydraulic proportional valve corresponding to the common hydraulic valve can be found. The electrohydraulic proportional valve can be used for realizing remote control along with hydraulic parameters in an open loop system, and can also be used as a signal conversion and amplification element for a closed loop control system. According to the Bernoulli effect, the flow rate flowing through the throttle orifice is not only related to the flow sectional area of the throttle orifice, but also related to the pressure difference before and after the throttle orifice, and the proportional valve directly driven by the proportional electromagnet can be degraded in proportion characteristic of the valve when the load pressure difference is changed due to the Bernoulli force applied to the valve core, so that the proportional valve is generally only used for the working condition of small flow rate. Therefore, the large-flow proportional valve basically adopts a two-stage or three-stage structure, and a high-performance servo valve is used as a pilot stage. Although the performance of the valve is improved, the valve has more complex structure, higher cost and reduced oil pollution resistance.
The university of Zhejiang industry, professor Ruan Jian, proposes 2D electrohydraulic digital servo reversing valves controlled by stepper motors. The stepping motor drives the valve core to rotate, and the balance of the resistance half bridge is broken through changing the size of the arch-shaped gaps of the high-low pressure holes and the spiral grooves, so that the valve core moves axially under the action of hydraulic unbalance force. The valve skillfully drives the valve core to rotate through the motor, and indirectly enables the valve core to be driven by hydraulic pressure with higher power to axially move, so that the rapidity of the valve is improved, the structure is simplified, and the oil liquid pollution resistance of the valve is enhanced. However, the transmission device of the valve is complex, the friction force existing in the transmission structure and the inherent gaps existing after the assembly link can influence the linearity, the repeatability, the hysteresis and other static characteristics of the valve, and the transmission precision of the valve can be further reduced due to long-term abrasion.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a zero-transmission full-bridge two-dimensional electro-hydraulic proportional reversing valve. The technical problems that a transmission device of a traditional two-dimensional electro-hydraulic proportional valve in the prior art is complex, inherent gaps and friction and abrasion in a mechanical transmission process affect static characteristics such as linearity, repeatability and hysteresis, and pressure fluctuation of an oil way of a pilot stage of the electro-hydraulic proportional valve affects proportional characteristics are solved.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a zero-drive full-bridge two-dimensional electro-hydraulic proportional reversing valve is characterized in that: comprising the following steps:
a valve body and an electromagnetic driving device embedded in the middle of the valve body;
the valve body includes:
the valve core is provided with a valve body,
the valve sleeve is coaxially sleeved outside the valve core, and the valve core and the valve sleeve can slide and rotate relatively;
the valve body is coaxially sleeved outside the valve sleeve;
the electromagnetic drive apparatus includes:
the rotor is coaxially sleeved on a rotor mounting groove of the valve core, realizes rotor positioning through matching with the rotor mounting groove, and can slide and rotate relative to the valve sleeve along with the valve core;
the stator winding is coaxially sleeved on the surface of the valve sleeve;
and the magnetic conduction sheet is embedded into the magnetic conduction sheet mounting groove on the outer surface of the valve sleeve and is used for transmitting the magnetic force of the stator winding.
Further: the valve body further includes:
the first end cover is covered at one end of the valve body;
and the second end cover is covered on the other end of the valve body.
Further: a plurality of magnetic conduction sheet mounting grooves are uniformly distributed in the middle of the outer surface of the valve sleeve in the circumferential direction, and each magnetic conduction sheet mounting groove is correspondingly embedded with a single magnetic conduction sheet; the middle part of the valve body is provided with a square through hole, and the square through hole is used for accommodating the electromagnetic driving device.
Further: the rotors are formed by arranging 8 pieces of magnetic materials in a circumference, the magnetism of two rotors opposite to each other on the circumference is opposite, and the magnetism of the adjacent 2 pieces of rotors is opposite to each other so as to ensure that corresponding electromagnetic torque can be generated on the rotors.
Further: the stator winding includes:
the stator silicon steel sheet is coaxially arranged with the valve sleeve;
the stator sleeve is coaxially arranged on the surface of the stator silicon steel sheet;
the first stator end cover is covered at the first end of the stator silicon steel sheet and is connected with the stator sleeve;
and the second stator end cover is covered at the second end of the stator silicon steel sheet and is connected with the stator sleeve.
Further: the stator silicon steel sheet is formed by stacking specific silicon steel sheets, eight groups of coils are wound on the stator silicon steel sheet, the eight groups of coils are uniformly distributed at 45 degrees on the radial circumference, opposite coils are the same group according to the relative positions of the coils on the circumference, and when the stator silicon steel sheet is electrified, forward current and reverse current are respectively conducted to generate electromagnetic torque to drive the valve core to rotate.
Further: the stator comprises a first stator end cover, a second stator end cover, a plurality of uniformly distributed counter bores, and bolts, wherein the first stator end cover is provided with a plurality of uniformly distributed counter bores, the second stator end cover is provided with uniformly distributed threaded holes corresponding to the uniformly distributed counter bores in number, the uniformly distributed counter bores are connected with the corresponding uniformly distributed threaded holes through the bolts, and the first stator end cover, the stator sleeve and the second stator end cover are fixedly connected through the bolts.
Further: the stator winding structure comprises a valve body, a first stator end cover, a second stator end cover and a valve body, wherein flange structures are arranged on the first stator end cover and the second stator end cover, corresponding mounting grooves and corresponding threaded holes are formed in the valve body, and the first stator end cover, the second stator end cover and the valve body are connected through bolts so as to complete the mounting and positioning of the stator winding.
Further: the dimension of the stator winding along the axial direction of the valve core is larger than the dimension of the rotor along the axial direction of the valve core, so that the rotor is driven by the valve core to axially reciprocate relative to the stator winding.
Further: the magnetic conduction sheet is formed by stacking silicon steel sheets, and the thickness of the valve sleeve between the magnetic conduction sheet and the rotor is smaller than or equal to 1mm.
Compared with the prior art, the invention has the following advantages:
the zero-transmission full-bridge two-dimensional electro-hydraulic proportional reversing valve adopts electromagnetic direct drive, so that mechanical friction in the traditional electro-mechanical conversion process is avoided, and adverse effects of nonlinear factors such as friction force on static characteristics of the electro-hydraulic proportional valve are effectively eliminated; the structure is simpler, and is favorable for obtaining larger power-weight ratio.
The zero-transmission full-bridge two-dimensional electro-hydraulic proportional reversing valve comprises a valve main body and electromagnetic driving devices, wherein the electromagnetic driving devices are embedded in the middle of the valve main body and are axially symmetrically distributed relative to the valve main body. The valve main body is of a full-bridge two-dimensional electro-hydraulic proportional reversing valve structure, the electromagnetic driving device can directly drive the valve core to rotate, and the valve core is driven to axially move under the action of the servo screw mechanism, so that hydraulic oil circulation, cutting and reversing are realized.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of a zero drive full bridge two-dimensional electro-hydraulic proportional reversing valve of the present invention;
FIG. 2 is a schematic cross-sectional structural view of an embodiment of a zero drive full bridge two-dimensional electro-hydraulic proportional reversing valve of the present invention;
FIG. 3 is a schematic diagram of the assembly of a valve body and an electromagnetic drive of an embodiment of a zero drive full bridge two-dimensional electro-hydraulic proportional reversing valve of the present invention;
FIG. 4 is a cross-sectional view of the valve body of the present invention
FIG. 5 is a schematic top view of the valve body of the present invention;
fig. 6 is a schematic view of the valve sleeve of the present invention in semi-section;
FIG. 7 is an isometric view of a valve cartridge structure of the present invention;
FIG. 8 is a side cross-sectional view of the electromagnetic drive of the present invention;
FIG. 9 is a second side cross-sectional view of the electromagnetic drive of the present invention;
FIG. 10 is a schematic view of the axial side structure of the magnetic conductive sheet of the present invention;
FIG. 11 is a schematic side view of the magnetic conductive sheet of the present invention;
FIG. 12 is a schematic view of an axial side structure of the silicon steel sheet of the present invention;
fig. 13 is a schematic view of the axial side structure of the first stator end cap of the present invention.
Reference numerals: the valve comprises a valve body, a 2-electromagnetic driving device, a 11-valve core, a 12-valve sleeve, a 13-valve body, a 21-rotor, a 22-magnetic conduction sheet, a 23-stator silicon steel sheet, a 24-stator sleeve, a 25-first stator end cover, a 26-second stator end cover, a 27-coil, a 111-rotor mounting groove, a 121-magnetic conduction sheet mounting groove, a 131-square through hole, a 132-mounting groove, 251-uniformly distributed counter bores, a 252-flange structure, a 261-uniformly distributed threaded hole, a 3-first end cover, a 4-second end cover, an a-first sensitive cavity, a b-valve core low pressure groove, a c-second sensitive cavity, a d-second low pressure circular hole, an e-first valve core low pressure hole, an f-second valve core low pressure hole, a g-first low pressure circular hole, an i 1-first low pressure rectangular groove, an i 2-second low pressure rectangular groove, a j 1-first high pressure rectangular groove, a j 2-second high pressure rectangular groove, an m 1-first damping groove and an m 2-second damping groove.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, preferred embodiments of the present invention will be described below with reference to specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the present invention; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship described in the drawings are for illustrative purposes only and are not to be construed as limiting the invention.
The invention is further illustrated by the following figures and examples, which are not intended to be limiting.
The invention firstly provides a zero-transmission full-bridge two-dimensional electro-hydraulic proportional reversing valve, and referring to fig. 1 and 2, the zero-transmission full-bridge two-dimensional electro-hydraulic proportional reversing valve of the embodiment comprises a valve main body 1 and an electromagnetic driving device 2 embedded in the middle of the valve main body 1. The valve main body is of a full-bridge two-dimensional electro-hydraulic proportional reversing valve structure, the electromagnetic driving device can directly drive the valve core to rotate, and the valve core is driven to axially move under the action of the servo screw mechanism, so that hydraulic oil circulation, cutting and reversing are realized. The zero-transmission full-bridge two-dimensional electromagnetic reversing valve directly drives the valve core of the slide valve through the electromagnetic iron core and the coil, so that a transmission mechanism of the traditional two-dimensional valve is omitted, the process of electric-mechanical conversion is simplified, contact abrasion is reduced, the problems of high-pressure dynamic sealing and the like are avoided, and the service life of the servo valve is prolonged.
In the embodiment, the zero-transmission full-bridge two-dimensional electro-hydraulic proportional reversing valve comprises a valve main body 1 and an electromagnetic driving device 2, wherein the electromagnetic driving device 2 is embedded in a valve body 13 and coaxially sleeved with a valve sleeve 12. The zero-transmission full-bridge two-dimensional electro-hydraulic proportional reversing valve directly combines the motor rotor with the valve core, adopts a full-bridge hydraulic structure, reduces the transmission structure between the driver and the valve core, ensures that the structure is more compact, realizes the non-contact transmission process of the valve core, and avoids the power loss caused by mechanical abrasion and high-pressure dynamic sealing; meanwhile, the valve core stress is improved by utilizing the full-bridge structure, the valve core driving force is improved, and high-pressure and large-flow can be realized more easily.
In this embodiment, after the driver gives a corresponding current signal to the electromagnetic driving device 2, the winding coil on the stator silicon steel sheet 23 is connected with current to generate a corresponding magnetic field, the magnetic field is transmitted to the rotor 21 through the magnetic conductive sheet 22, and the rotor 21 generates a corresponding torque under the action of the magnetic field and drives the valve core 11 to rotate by a corresponding angle. After the valve core 11 rotates, the interface area between the high-low pressure holes and the damping grooves of the servo screw mechanism formed by the two ends of the valve core 11 and the valve sleeve 12 changes, so that the pressure of the hydraulic cavities at the two ends is respectively increased and decreased, hydraulic pressure is generated, the valve core 11 is driven to axially move, and the switching of the hydraulic valve oil paths is realized.
In the present embodiment, the valve body 1 includes a valve core 11, a valve housing 12, a valve body 13, a first end cover 3, a second end cover 4; wherein, the valve sleeve 12 is sleeved outside the valve core 11, and the valve core 11 and the valve sleeve 12 can rotate and slide relatively; the valve body 13 is sleeved outside the valve sleeve 12, and the valve body 13 is fixedly connected with the valve sleeve 12 by a positioning pin and the like. The first end cover 3 is covered on one end of the valve body 13, and the second end cover 4 is covered on the other end of the valve body 13. The first end cover 3 and the second end cover 4 are respectively sealed to one end of the valve body 13, static seals are arranged on the first end cover 3 and the second end cover 4 to prevent hydraulic oil from leaking, and the first end cover 3 and the second end cover 4 are fixedly connected with the valve body 13 through threads.
In the present embodiment, the middle part of the valve core 11 is provided with a rotor mounting groove 111, and the rotor 21 of the electromagnetic driving device 2 is embedded in the rotor mounting groove 111, and can be fixed on the valve core 11 through glue, so that the electromagnetic driving force can be transmitted to the valve core 11, and the electromagnetic driving force can move along with the valve core 11 in two dimensions.
In this embodiment, a square through hole 131 is provided in the middle of the valve body 13, and the square through hole 131 is used for accommodating the electromagnetic driving device 2. The valve body 13 should be secured with a sufficient thickness above and below the square through hole 131 to prevent the valve body 13 from being deformed too much. Meanwhile, the thickness of the upper and lower parts of the middle square through hole 131 of the valve body 13 should ensure that the deformation amount of the valve body 13 is small, so as to ensure that the coaxiality of the valve sleeve 12 and the valve core 11 is not affected.
In the present embodiment, the electromagnetic driving device 2 includes a rotor 21, a magnetic conductive sheet 22, a stator silicon steel sheet 23, a stator sleeve 24, a first stator end cover 25, and a second stator end cover 26. The rotor 21 is coaxially sleeved on the rotor mounting groove 111 of the valve core 11, and is matched with the rotor mounting groove 211 to realize the positioning of the rotor 21 and can slide and rotate relative to the valve sleeve 12 along with the valve core 11. A first stator end cover 25, which is arranged at the first end of the stator silicon steel sheet 23 in a covering manner and is connected with the stator sleeve 24; and a second stator end cover 26, which is covered on the second end of the stator silicon steel sheet 23 and is connected with the stator sleeve 24.
The rotors are formed by arranging 8 pieces of magnetic materials in a circumference, and the magnetism of two circumferentially opposite rotors 21 is opposite, and the magnetism of the adjacent 2 pieces of rotors is opposite so as to ensure that corresponding electromagnetic torque can be generated on the rotors.
The magnetic conductive sheet 22 is inserted into the magnetic conductive sheet mounting groove 121 on the outer surface of the valve housing 12, and is positioned at the initial position by the valve housing 12 for transmitting the magnetic force of the stator winding. The middle part of the outer surface of the valve sleeve 12 is uniformly distributed with a plurality of magnetic conducting sheet mounting grooves 121 in the circumferential direction, and each magnetic conducting sheet mounting groove 121 is correspondingly embedded with a single magnetic conducting sheet 22. The stator sleeve 24 is coaxially sleeved on the surface of the stator silicon steel sheet 23. The first stator end cover 25 is provided with a plurality of uniformly distributed counter bores 251, the second stator end cover 26 is provided with uniformly distributed threaded holes 261 corresponding to the uniformly distributed counter bores 251 in number, the uniformly distributed counter bores 251 are connected with the corresponding uniformly distributed threaded holes 261 through bolts, and the first stator end cover 25, the stator sleeve 24 and the second stator end cover 26 are fixedly connected through the bolts.
In this embodiment, the first stator end cover 25 and the second stator end cover 26 are provided with flange structures 252, the valve body 13 is provided with corresponding mounting grooves 132 and corresponding threaded holes, and the first stator end cover 25, the second stator end cover 26 and the valve body 13 are connected through bolts to complete the mounting and positioning of the stator winding.
In the present embodiment, the magnetic conductive sheet 22 and the stator silicon steel sheet 23 are stacked from a single silicon steel sheet for reducing magnetic loss and increasing driving power. In the same way, in order to ensure that the electromagnetic torque is large enough and the magnetic loss is reduced, the valve core 11, the valve sleeve 12, the valve body 13, the stator sleeve 24, the first stator end cover 25 and the second stator end cover 26 are made of non-magnetic materials, and the distance between the rotor 21 and the magnetic sheet 22 is small enough on the basis of ensuring the pressure resistance of the valve sleeve 12.
Eight groups of coils 27 are wound on the stator silicon steel sheet 23, the eight groups of coils 27 are uniformly distributed at 45 degrees on the radial circumference, the opposite coils 27 are the same group according to the relative position of the coils on the circumference, and when the stator silicon steel sheet is electrified, forward current and reverse current are respectively conducted to generate electromagnetic torque to drive the valve core 11 to rotate.
The magnetic conductive sheet 22 is formed by stacking silicon steel sheets, and the thickness of the valve sleeve 12 between the magnetic conductive sheet 22 and the rotor 21 is less than or equal to 1mm.
In this embodiment, the rotor 21 of the electromagnetic driving device 2 has 50 poles in total, N poles and S poles are distributed in a staggered manner, and the stator silicon steel sheet is divided into 8 groups of poles by adopting 48 poles. When the two-dimensional electromagnetic reversing valve works, the driver gives a pulse signal to the electromagnetic driving device 2, the magnetic poles of the stator transmit magnetism to the magnetic conducting sheets 22, and magnetic force is generated together with the magnetic poles on the rotor 21, so that the valve core 11 is driven to rotate by one step angle. In addition, the electromagnetic driving rotor can also use other magnetic circuits and rotor combinations to drive the rotor of the valve core 11, as shown in fig. 3, the magnetic poles are distributed, 8 pieces of magnetic steel are stuck on the surface of the rotor 21, N poles and S poles are distributed in a staggered way, the stator has 8 groups of magnetic poles, after receiving a sine signal, the magnetic poles of the stator transmit magnetism to the magnetic conduction sheet 22, the magnetic conduction sheet 22 and the magnetic steel on the surface of the rotor 21 jointly generate torque, and the valve core 11 is driven to rotate.
In this embodiment, the rotor 21 will move axially along with the valve core 11, so as to ensure the stability of the electromagnetic driving device in normal operation, the effective lengths of the magnetic conductive sheet 22 and the stator silicon steel sheet 23 should be longer than the effective length of the rotor 21, and the radial magnetic fields of the magnetic conductive sheet and the stator silicon steel sheet can be ensured not to be affected by the axial movement of the rotor 21 in different axial directions.
In this embodiment, the valve sleeve 12 is sequentially opened with a port P, a port a, a port T, a magnetic sheet mounting groove 121, a port T, a port B, and a port P in the axial direction, wherein the port P is an oil inlet, and the pressure is the system pressure. The middle part of the valve core 11 is provided with a rotor mounting groove 211, the valve core 11 is provided with two shoulders which respectively correspond to the port A and the port B on the valve sleeve 12, and a first valve core low pressure hole e and a second valve core low pressure hole f are respectively arranged between the two shoulders and the rotor mounting groove 211. In addition, a first high-pressure rectangular groove j1 communicated with the P port is formed in one side of the valve core 11, a first low-pressure circular hole g and a first low-pressure rectangular groove i1 communicated with the T port are formed in the other end of the valve core 11, and a second low-pressure circular hole d, a second high-pressure rectangular groove j2 and a second low-pressure rectangular groove i2 which are the same are formed in the other end of the valve core 11 at the central symmetry position of the central line of the valve core 11. The first sensitive cavity a and the second sensitive cavity c are respectively formed between the first end cover 14, the second end cover 15 and the end shoulder of the valve core 11. The left end and the right end of the inner hole of the valve sleeve 12 are respectively provided with a first damping groove m1 and a second damping groove m2 which are communicated with the sensitive cavity, and the first damping groove m1 and the second damping groove m2 are centrally symmetrical relative to the central line of the valve sleeve 12. A variable throttle orifice n1 is formed between the first high-pressure rectangular groove j1 and the first damping groove m1, a variable throttle orifice n2 is formed between the first low-pressure rectangular groove i1 and the first damping groove m2, the variable throttle orifices n1 and n2 are connected in series to form a hydraulic resistance half bridge, and two hydraulic resistance half bridges at two ends of the valve core are connected in series to form a hydraulic resistance full bridge, so that the pressure of the sensitive cavities a and c is controlled.
The working principle of the embodiment is as follows: the effective acting areas of the first sensitive cavity a and the second sensitive cavity c are half of the corresponding hydraulic cavities of the P port. When the zero-drive full-bridge two-dimensional electro-hydraulic proportional reversing valve does not work, the zero-drive full-bridge two-dimensional electro-hydraulic proportional reversing valve is in a zero position, hydraulic pressure born by the left end and the right end of the valve core is equal in magnitude, and at the moment, the port A, the port B, the port P and the port T are not communicated. After the coil 27 is electrified, the coil 27 on the rotor silicon steel sheet 23 generates a magnetic field and transmits the magnetic field to the magnetic conductive sheet 22, the corresponding magnetic field is shown in fig. 9, and under the action of the magnetic field transmitted by the magnetic conductive sheet 22, the rotor 21 receives electromagnetic torque and rotates by a corresponding angle, and the electromagnetic torque disappears. Driven by the rotor 21, the valve core 11 rotates by the same angle, the junction area of the first high-pressure rectangular groove j1 and the damping groove m1 is increased, the junction area of the first low-pressure rectangular groove i1 and the damping groove m1 is reduced, and the pressure in the first sensitive cavity a is increased; in contrast, the cross-sectional area between the second high-pressure rectangular groove j2 and the damping groove m2 is reduced, the cross-sectional area between the second low-pressure rectangular groove i2 and the damping groove m2 is increased, the pressure in the second sensitive chamber c is reduced, and the spool 11 is subjected to the hydraulic force to generate axial displacement moving toward the second sensitive chamber c. At this time, the port A is communicated with the port P, the port B is communicated with the port T, the junction area of the first damping groove m1 and the first high-pressure rectangular groove j1 and the junction area of the first low-pressure rectangular groove i1 are gradually equal in the movement process, the junction area of the second damping groove m2 and the second high-pressure rectangular groove j2 and the junction area of the first low-pressure rectangular groove i2 are gradually equal, the hydraulic pressure born by the valve core is gradually reduced, and the valve core is restored to the balance state after the movement is finished. The zero-transmission full-bridge two-dimensional electro-hydraulic proportional reversing valve can theoretically realize the non-contact transmission process of electric, magnetic, mechanical and hydraulic, the energy transmission process only has a driving device, and no other mechanical transmission process, so that the influence of inherent gaps and mechanical friction on the linearity, repeatability, hysteresis and other static characteristics of the two-dimensional electro-hydraulic proportional valve is greatly reduced, the energy transmission process is simplified, the whole structure is compact, the improvement of the power-weight ratio of the two-dimensional electric proportional valve is facilitated, and the dynamic response characteristic of the two-dimensional electro-hydraulic proportional valve can be improved to a certain extent by adopting a zero-transmission driving mode.
The two-dimensional electromagnetic directional valve of the present invention can be easily manufactured or used by those skilled in the art based on the description of the present invention and the accompanying drawings, and can produce the positive effects described in the present invention.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent variation, etc. of the above embodiment according to the technical matter of the present invention fall within the scope of the present invention.
Claims (10)
1. A zero-drive full-bridge two-dimensional electro-hydraulic proportional reversing valve is characterized in that: comprising the following steps:
a valve body and an electromagnetic driving device embedded in the middle of the valve body;
the valve body includes:
the valve core is provided with a valve body,
the valve sleeve is coaxially sleeved outside the valve core, and the valve core and the valve sleeve can slide and rotate relatively;
the valve body is coaxially sleeved outside the valve sleeve;
the electromagnetic drive apparatus includes:
the rotor is coaxially sleeved on a rotor mounting groove of the valve core, realizes rotor positioning through matching with the rotor mounting groove, and can slide and rotate relative to the valve sleeve along with the valve core;
the stator winding is coaxially sleeved on the surface of the valve sleeve;
and the magnetic conduction sheet is embedded into the magnetic conduction sheet mounting groove on the outer surface of the valve sleeve and is used for transmitting the magnetic force of the stator winding.
2. The zero-drive full-bridge two-dimensional electro-hydraulic proportional reversing valve according to claim 1, wherein: the valve body further includes:
the first end cover is covered at one end of the valve body;
and the second end cover is covered on the other end of the valve body.
3. The zero-drive full-bridge two-dimensional electro-hydraulic proportional reversing valve according to claim 1, wherein: a plurality of magnetic conduction sheet mounting grooves are uniformly distributed in the middle of the outer surface of the valve sleeve in the circumferential direction, and each magnetic conduction sheet mounting groove is correspondingly embedded with a single magnetic conduction sheet; the middle part of the valve body is provided with a square through hole, and the square through hole is used for accommodating the electromagnetic driving device.
4. The zero-drive full-bridge two-dimensional electro-hydraulic proportional reversing valve according to claim 1, wherein: the rotors are formed by arranging 8 pieces of magnetic materials in a circumference, the magnetism of two rotors opposite to each other on the circumference is opposite, and the magnetism of the adjacent 2 pieces of rotors is opposite to each other so as to ensure that corresponding electromagnetic torque can be generated on the rotors.
5. The zero-drive full-bridge two-dimensional electro-hydraulic proportional reversing valve according to claim 1, wherein: the stator winding includes:
the stator silicon steel sheet is coaxially arranged with the valve sleeve;
the stator sleeve is coaxially arranged on the surface of the stator silicon steel sheet;
the first stator end cover is covered at the first end of the stator silicon steel sheet and is connected with the stator sleeve;
and the second stator end cover is covered at the second end of the stator silicon steel sheet and is connected with the stator sleeve.
6. The zero-drive full-bridge two-dimensional electro-hydraulic proportional reversing valve according to claim 5, wherein: the stator silicon steel sheet is formed by stacking specific silicon steel sheets, eight groups of coils are wound on the stator silicon steel sheet, the eight groups of coils are uniformly distributed at 45 degrees on the radial circumference, opposite coils are the same group according to the relative positions of the coils on the circumference, and when the stator silicon steel sheet is electrified, forward current and reverse current are respectively conducted to generate electromagnetic torque to drive the valve core to rotate.
7. The zero-drive full-bridge two-dimensional electro-hydraulic proportional reversing valve according to claim 5, wherein: the stator comprises a first stator end cover, a second stator end cover, a plurality of uniformly distributed counter bores, and bolts, wherein the first stator end cover is provided with a plurality of uniformly distributed counter bores, the second stator end cover is provided with uniformly distributed threaded holes corresponding to the uniformly distributed counter bores in number, the uniformly distributed counter bores are connected with the corresponding uniformly distributed threaded holes through the bolts, and the first stator end cover, the stator sleeve and the second stator end cover are fixedly connected through the bolts.
8. The zero-drive full-bridge two-dimensional electro-hydraulic proportional reversing valve according to claim 5, wherein: the stator winding structure comprises a valve body, a first stator end cover, a second stator end cover and a valve body, wherein flange structures are arranged on the first stator end cover and the second stator end cover, corresponding mounting grooves and corresponding threaded holes are formed in the valve body, and the first stator end cover, the second stator end cover and the valve body are connected through bolts so as to complete the mounting and positioning of the stator winding.
9. The zero-drive full-bridge two-dimensional electro-hydraulic proportional reversing valve according to claim 1, wherein: the dimension of the stator winding along the axial direction of the valve core is larger than the dimension of the rotor along the axial direction of the valve core, so that the rotor is driven by the valve core to axially reciprocate relative to the stator winding.
10. The zero-drive full-bridge two-dimensional electro-hydraulic proportional reversing valve according to claim 1, wherein: the magnetic conduction sheet is formed by stacking silicon steel sheets, and the thickness of the valve sleeve between the magnetic conduction sheet and the rotor is smaller than or equal to 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310769501.5A CN116838661A (en) | 2023-06-28 | 2023-06-28 | Zero-transmission full-bridge two-dimensional electro-hydraulic proportional reversing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310769501.5A CN116838661A (en) | 2023-06-28 | 2023-06-28 | Zero-transmission full-bridge two-dimensional electro-hydraulic proportional reversing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116838661A true CN116838661A (en) | 2023-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310769501.5A Pending CN116838661A (en) | 2023-06-28 | 2023-06-28 | Zero-transmission full-bridge two-dimensional electro-hydraulic proportional reversing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116838661A (en) |
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2023
- 2023-06-28 CN CN202310769501.5A patent/CN116838661A/en active Pending
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