CN114427554B - Slide valve type high-speed switching valve driven by piezoelectric stack and control method - Google Patents
Slide valve type high-speed switching valve driven by piezoelectric stack and control method Download PDFInfo
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- CN114427554B CN114427554B CN202111625889.9A CN202111625889A CN114427554B CN 114427554 B CN114427554 B CN 114427554B CN 202111625889 A CN202111625889 A CN 202111625889A CN 114427554 B CN114427554 B CN 114427554B
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- 230000033001 locomotion Effects 0.000 claims abstract description 6
- 230000000694 effects Effects 0.000 claims abstract description 4
- 230000004044 response Effects 0.000 abstract description 4
- 238000006073 displacement reaction Methods 0.000 abstract 3
- 230000005284 excitation Effects 0.000 abstract 1
- 230000009471 action Effects 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008054 signal transmission Effects 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
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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
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/32—Means for additional adjustment of the rate of flow
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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
- F16K31/004—Actuating devices; Operating means; Releasing devices actuated by piezoelectric means
- F16K31/007—Piezoelectric stacks
- F16K31/008—Piezoelectric stacks for sliding valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The invention discloses a slide valve type high-speed switch valve driven by a piezoelectric stack, and relates to the field of hydraulic control elements. The two piezoelectric stacks are nested together through the sleeve, the pretightening force of the pretightening disc spring is overcome under the excitation of a voltage signal, the two piezoelectric stacks output displacement superposition, large displacement output is realized, and the space utilization rate is improved. The valve core adopts unilateral slide valve type, and the displacement that the piezoelectric stack output is passed through the output pole and is transmitted to the valve core, and the valve core overcomes the pretightning force of restoring dish spring under the effect of output pole, makes the ooff valve open, and the ooff valve keeps closing under the effect of restoring spring after the outage, and the zero setting bolt is adjusted the cover volume of valve core and valve body pre-opening through the anti-torsion gasket. The invention uses the nested piezoelectric stack as a driver to realize the high-frequency switch of the high-speed switch valve, and simultaneously uses the slide valve type valve core, thereby avoiding the collision between the valve core and the valve body during high-frequency movement and having the characteristics of high frequency response, low noise and long service life.
Description
Technical Field
The invention relates to the field of hydraulic control elements, in particular to a slide valve type high-speed switch valve driven by a piezoelectric stack.
Background
The digital hydraulic technology can realize signal transmission between the hydraulic valve and the controller without A/D or D/A conversion, and has the advantages of high fault tolerance, high speed, accurate control, high efficiency and the like. The high-speed switch valve is used as the most widely used digital valve at present, and the switch time is controlled by changing the duty ratio of the PWM signal, so that the control of flow and pressure is realized. Because the traditional electromagnetic high-speed switch valve is limited by coil inductance, the response speed is slower, and the control precision of the traditional electromagnetic high-speed switch valve on pressure and flow is limited. The high-speed switch valve works in a high-frequency switch state, so that the problems of noise and pressure impact generated by the high-speed switch valve are always problems to be solved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a slide valve type high-speed switch valve driven by a piezoelectric stack, which can meet high frequency response and avoid noise vibration caused by collision between a valve core and a valve body.
The invention also provides a control method of the high-speed switch valve.
In order to achieve the above purpose, the slide valve type high-speed switch valve driven by the piezoelectric stack provided by the invention can adopt the following technical scheme:
a piezoelectric stack driven spool valve type high speed switching valve includes an electromechanical transducer assembly and a valve body assembly; the motor converter comprises a shell, an outer piezoelectric stack, an inner piezoelectric stack, a sleeve and an output rod, wherein the outer piezoelectric stack and the inner piezoelectric stack are positioned in the shell; the sleeve comprises an accommodating cavity for accommodating the inner piezoelectric stack, a bottom wall positioned at the bottom of the accommodating cavity, and a step part positioned at the outer edge of the opening of the accommodating cavity and protruding outwards; one end of the internal piezoelectric stack is abutted against the output rod, and the other end is abutted against the bottom wall; the outer piezoelectric stack is arranged around the sleeve, one end of the outer piezoelectric stack is propped against the step part, and the other end of the outer piezoelectric stack is propped against the anti-torsion gasket; the valve body assembly comprises a valve body arranged on the lower end face of the shell, a slide valve type valve core arranged in the valve body to form a throttling effect, a reset bolt arranged on the lower end face of the valve core, and a reset disc spring arranged between the reset bolt and the valve core.
Furthermore, the valve core adopts a slide valve type, and the on-off control between the oil inlet and the oil return port is realized by the cooperation of the slide valve and the valve body through the reciprocating motion of the slide valve.
Further, the motor converter further comprises a zeroing bolt arranged in the base, an inner hexagon bolt arranged on the shell and the base, and an anti-torsion gasket arranged between the outer piezoelectric stack and the base; the outer piezoelectric stack is abutted against the base in a contact mode with the anti-torsion gasket.
Further, the motor converter also comprises a pre-tightening end cover arranged on the lower end surface of the shell and a pre-tightening disc spring arranged between the pre-tightening end cover and the output rod; the output rod is always in contact with the internal piezoelectric stack under the pretightening force of the pretightening disc spring.
Further, the base is connected with the zero setting bolt through threads, the zero setting bolt is rotated, and the covering amount of the pre-opening between the valve core and the valve body is adjusted through the anti-torsion gasket.
The control method of the slide valve type high-speed switch valve driven by the piezoelectric stack adopts the following technical scheme:
and PWM voltage signals are applied to the outer piezoelectric stack and the inner piezoelectric stack, the outer piezoelectric stack and the inner piezoelectric stack are electrified to deform, the output rod is pushed to move downwards, the output rod pushes the valve core to move downwards, so that a throttle formed by the valve core and the valve body is opened, the oil inlet and the oil outlet are communicated, and the high-speed switch valve is opened.
The beneficial effects are that:
1. the invention adopts the piezoelectric stack as the driver, so that the high-speed switch valve has higher response speed.
2. The valve core adopts a slide valve type structure, so that the valve core is prevented from colliding with the valve body during high-frequency movement, and the valve core has the characteristics of low noise and long service life.
3. The valve core adopts a three-shoulder single-side slide valve structure type, has simple structure process and low processing cost, and is suitable for mass production.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a piezoelectric stack actuated spool valve high speed switching valve according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of a spool valve high speed switch valve closed position according to an embodiment of the present invention;
fig. 3 is a schematic view of the open position of the spool valve type high-speed switching valve according to the embodiment of the present invention.
Detailed Description
The invention is further elucidated below in connection with the drawings and the detailed description.
As shown in fig. 1, 2 and 3, this embodiment provides a slide valve type high-speed switching valve driven by a piezoelectric stack, which includes a zeroing bolt 1, a base 2, an anti-torsion gasket 4, an inner hexagonal bolt 3, a housing 5, an outer piezoelectric stack 6, a sleeve 7, an inner piezoelectric stack 8, an output rod 9, a pre-tightening disc spring 10, a pre-tightening end cover 11, a valve body 12, a valve core 13, an O-ring one 14, an O-ring two 15, a reset disc spring 16 and a reset bolt 17.
The base 2 is detachably and fixedly connected with the shell 5 (through four socket head cap screws 4). The base 2 and the zeroing bolt 1 are connected through threads, the zeroing bolt 1 is screwed, and the axial distance between the anti-torsion gasket 4 and the base 2 can be adjusted, so that the valve core and the valve body pre-opening covering amount can be adjusted. The base 2 is provided with a positioning boss, the anti-torsion gasket 4 is provided with a positioning groove, and the positioning boss and the anti-torsion gasket are mutually matched to form radial positioning of the anti-torsion gasket 4, so that torque is prevented from being transmitted to the outer piezoelectric stack 6. The outer piezoelectric 6 stack and the inner piezoelectric 8 stack form a nested structure through the sleeve 7, so that the space utilization rate is improved. The sleeve 7 comprises a containing cavity 72 for containing the inner piezoelectric stack 8, a bottom wall 71 positioned at the bottom of the containing cavity, and a step part 73 positioned at the outer edge of the opening of the containing cavity and protruding outwards; one end of the internal piezoelectric stack 8 abuts against the output rod 9 and the other end abuts against the bottom wall 71; the outer piezoelectric stack 6 is arranged around the sleeve 7 with one end of the outer piezoelectric stack 6 abutting against the step 73 and the other end abutting against the anti-twist gasket 4. Under the action of the pre-tightening disc spring 10, the output rod 9 always keeps contact with the internal piezoelectric stack 8, the pre-tightening end cover 11 is in threaded connection with the shell 5, and the pre-tightening force of the pre-tightening disc spring 10 is adjusted through the pre-tightening end cover 11. The output rod 9 is provided with a positioning boss, the shell 5 is provided with a positioning groove, and the positioning boss and the positioning groove are matched with each other to form radial positioning of the output rod 9, so that the output rod 9 is prevented from transmitting torque to the internal piezoelectric stack 8.
The valve body 12 is screwed with the housing 5. The valve core 13 is arranged in the valve body 12, and the valve core 13 is always kept in contact with the output rod 9 under the pretightening force of the reset disc spring 16. The reset bolt 17 is in threaded connection with the valve body 12, and the pretightening force of the reset disc spring 16 is adjusted through the reset bolt 17.
The working principle of the invention is as follows:
1. as shown in fig. 2, when the outer piezoelectric stack 6 and the inner piezoelectric stack 8 are not electrified, the output rod 9 is at the uppermost position under the action of the pretightening force of the pretightening disc spring 10, the valve core 13 keeps contact with the output rod 9 under the action of the pretightening force of the resetting disc spring 16, the valve core 13 is at the uppermost position, the throttle opening formed by the valve core 13 and the valve body 12 is kept closed, the oil inlet P and the oil outlet T are not communicated, and the high-speed switch valve is closed. By adjusting the zeroing bolt 1, the covering amount of the valve core 13 and the pre-opening of the throttle opening of the valve body 12 can be adjusted.
2. As shown in fig. 3, when the outer piezoelectric stack 6 and the inner piezoelectric stack 8 are energized to deform, the output rod 9 is pushed to move downward, and the output rod 9 pushes the valve core 13 to move downward. The movement of the valve core 13 causes the throttle 18 formed by the valve core 13 and the valve body 12 to be opened, the oil inlet P and the oil outlet T are communicated, and the high-speed switch valve is opened. By applying PWM voltage signals to the external piezoelectric stack 6 and the internal piezoelectric stack 8, high-frequency switching movement of the piezoelectric stack-driven spool-type high-speed switching valve can be achieved.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that other parts not specifically described are within the prior art or common general knowledge to a person of ordinary skill in the art. Modifications and alterations may be made without departing from the principles of this invention, and such modifications and alterations should also be considered as being within the scope of the invention.
Claims (5)
1. A slide valve type high-speed switch valve driven by a piezoelectric stack is characterized in that: comprises a motor converter and a valve body assembly;
the motor converter comprises a shell (5), a base (2) arranged at the upper end of the shell (5), an outer piezoelectric stack (6) and an inner piezoelectric stack (8) which are arranged in the shell, a sleeve (7) arranged between the outer piezoelectric stack (6) and the inner piezoelectric stack (8) and an output rod (9); the sleeve (7) comprises a containing cavity (72) for containing the inner piezoelectric stack (8), a bottom wall (71) positioned at the bottom of the containing cavity, and a step part (73) positioned at the outer edge of the opening of the containing cavity and protruding outwards; one end of the internal piezoelectric stack (8) is abutted against the output rod (9) and the other end is abutted against the bottom wall (71); the outer piezoelectric stack (6) is arranged around the sleeve (7), one end of the outer piezoelectric stack (6) is abutted against the step part (73) and the other end is abutted against the anti-torsion gasket (4);
the valve body assembly comprises a valve body (12) arranged on the lower end surface of the shell (5), a slide valve type valve core (13) arranged in the valve body (12) to form a throttling effect, a reset bolt (17) arranged on the lower end surface of the valve core (13), and a reset disc spring (16) arranged between the reset bolt (17) and the valve core (13);
and PWM voltage signals are applied to the outer piezoelectric stack (6) and the inner piezoelectric stack (8), the outer piezoelectric stack (6) and the inner piezoelectric stack (8) are electrified to deform, the output rod (9) is pushed to move downwards, the output rod (9) pushes the valve core (13) to move downwards, so that a throttle (18) formed by the valve core (13) and the valve body (12) is opened, the oil inlet (P) is communicated with the oil outlet (T), and the high-speed switch valve is opened.
2. The piezo-stack actuated spool valve high speed switching valve of claim 1, wherein: the valve core (13) adopts a slide valve type, and realizes on-off control between the oil inlet and the oil return port by the reciprocating motion of the slide valve and the cooperation of the slide valve and the valve body (12).
3. The piezo-stack actuated spool valve high speed switching valve of claim 1, wherein: the motor converter further comprises a zeroing bolt (1) arranged in the base (2), an inner hexagon bolt (3) arranged on the shell (5) and the base (2), and an anti-torsion gasket (4) arranged between the outer piezoelectric stack (6) and the base (2); the outer piezoelectric stack (6) is abutted against the base (2) in a contact mode with the anti-torsion gasket (4).
4. A piezo-stack actuated spool valve high speed switching valve as claimed in claim 3 wherein: the motor converter also comprises a pre-tightening end cover (11) arranged on the lower end surface of the shell (5), and a pre-tightening disc spring (10) arranged between the pre-tightening end cover (11) and the output rod (9); the output rod (9) is always in contact with the internal piezoelectric stack (8) under the pretightening force of the pretightening disc spring (10).
5. The piezo-stack actuated spool valve high-speed switching valve of claim 4, wherein: the base (2) is connected with the zero setting bolt (1) through threads, the zero setting bolt (1) is rotated, and the covering quantity of the pre-opening between the valve core (13) and the valve body (12) is adjusted through the anti-torsion gasket (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111625889.9A CN114427554B (en) | 2021-12-28 | 2021-12-28 | Slide valve type high-speed switching valve driven by piezoelectric stack and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111625889.9A CN114427554B (en) | 2021-12-28 | 2021-12-28 | Slide valve type high-speed switching valve driven by piezoelectric stack and control method |
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| Publication Number | Publication Date |
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| CN114427554A CN114427554A (en) | 2022-05-03 |
| CN114427554B true CN114427554B (en) | 2023-06-20 |
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| CN202111625889.9A Active CN114427554B (en) | 2021-12-28 | 2021-12-28 | Slide valve type high-speed switching valve driven by piezoelectric stack and control method |
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| CN110985212B (en) * | 2019-11-04 | 2022-04-22 | 南京航空航天大学 | Indirect hydraulic drive type fuel oil switch valve of pump control cylinder and control method thereof |
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2021
- 2021-12-28 CN CN202111625889.9A patent/CN114427554B/en active Active
Patent Citations (3)
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| CN106224322A (en) * | 2016-08-26 | 2016-12-14 | 南京航空航天大学 | A kind of two-way adjustable speed electricity hydrostatic actuator and method of work thereof |
| CN110594477A (en) * | 2019-09-29 | 2019-12-20 | 南京航启电液控制设备有限公司 | Soft landing PWM control method and system for piezoelectric high-speed switch valve |
| CN113422537A (en) * | 2021-06-09 | 2021-09-21 | 南京航空航天大学 | High-frequency large-displacement multidimensional discrete magnetostrictive actuator and control method |
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| CN114427554A (en) | 2022-05-03 |
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