CN117681844B - Passive direct-drive electrohydraulic brake servo valve and unmanned aerial vehicle - Google Patents
Passive direct-drive electrohydraulic brake servo valve and unmanned aerial vehicle Download PDFInfo
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- CN117681844B CN117681844B CN202311847253.8A CN202311847253A CN117681844B CN 117681844 B CN117681844 B CN 117681844B CN 202311847253 A CN202311847253 A CN 202311847253A CN 117681844 B CN117681844 B CN 117681844B
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- 230000015572 biosynthetic process Effects 0.000 claims 1
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- 230000004044 response Effects 0.000 abstract description 20
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- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 7
- RZVHIXYEVGDQDX-UHFFFAOYSA-N 9,10-anthraquinone Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3C(=O)C2=C1 RZVHIXYEVGDQDX-UHFFFAOYSA-N 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000007667 floating Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000001502 supplementing effect Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 239000000243 solution Substances 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
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
- B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/32—Alighting gear characterised by elements which contact the ground or similar surface
- B64C25/42—Arrangement or adaptation of brakes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Braking Arrangements (AREA)
Abstract
The application relates to a passive direct-drive electrohydraulic brake servo valve and an unmanned aerial vehicle, which comprise: a valve body; the main valve core is arranged in the valve body, and a clamping groove is formed in one end of the main valve core; and one end of the jacking block is provided with a clamping block, and the jacking block is clamped in the clamping groove of the main valve core through the clamping block. Through the connection of the main valve core and the top block, the main valve core is driven to move forward and reset directly through the top block, so that the synchronism of the movement of the two connecting pieces can be ensured, the cantilever end of the main valve core can be radially floated and positioned, the stability of the high-speed movement of the main valve core is ensured, the movement damping of the main valve core is reduced, the movement response speed of the main valve core is improved, and the lifting and depressurization response time of the whole brake system is prolonged.
Description
Technical Field
The invention relates to the field of braking systems, in particular to a passive direct-drive electrohydraulic braking servo valve and an unmanned aerial vehicle.
Background
At present, the hydraulic servo valve is gradually adopted to replace the hydraulic servo valve by the brake system due to the low oil-liquid pollution resistance capability, high failure rate and other reasons of the hydraulic servo valve, the passive direct-drive electro-hydraulic brake valve does not need to provide a hydraulic source for an airplane, the product can realize the braking function of the airplane by in-situ self-built hydraulic pressure, and the hydraulic servo valve has the characteristics of high cost performance, simplicity, high efficiency, practicability, large secondary development potential and the like.
In the related art, a cantilever end of a main valve core of the passive direct-drive electro-hydraulic brake valve is in transmission connection with a speed reducer through a jacking block, the main valve core is not connected with the jacking block, the main valve core is pushed to move forwards through the jacking block, and the main valve core is reset through a spring.
But in the process that the ejector block pushes the main valve core to move forwards, hydraulic pressure is needed to be overcome, the elastic force of the spring is also needed to be overcome, the motion damping of the main valve core is greatly increased, the power of the servo motor is improved, the spring occupies part of the space for the main valve core to move, the main valve core cannot move to the limit position, the motion response speed of the main valve core is reduced, and the rising and falling response time of the whole brake system is reduced.
Disclosure of Invention
The application provides a passive direct-drive electrohydraulic brake servo valve and an unmanned aerial vehicle, which can solve the problems that in the related art, in the process that a jacking block pushes a main valve core to move forwards, hydraulic force is needed to be overcome, the elastic force of a spring is needed to be overcome, the motion damping of the main valve core is greatly increased, the power of a servo motor is improved, the spring occupies part of the space of the main valve core, the main valve core cannot move to a limit position, the motion response speed of the main valve core is reduced, and the rising and falling response time of the whole brake system is reduced.
In a first aspect, an embodiment of the present application provides a passive direct-drive electro-hydraulic brake servo valve, including: a valve body; the main valve core is arranged in the valve body, and a clamping groove is formed in one end of the main valve core; and one end of the jacking block is provided with a clamping block, and the jacking block is clamped in the clamping groove of the main valve core through the clamping block.
With reference to the first aspect, in one embodiment, the clamping groove is annular and extends around the outer side of the main valve core in a circumferential manner; the main valve core passes through the opening to enter the cavity, and the opening extends to a direction close to the axis of the top block to form the clamping block.
With reference to the first aspect, in one implementation manner, a card interface is disposed on an outer side of the cavity, the card interface is communicated with the cavity, and a width of the card interface is smaller than a diameter of the top block.
In combination with the first aspect, in one implementation manner, an oil tank is mounted on the valve body, a secondary valve core is mounted in the main valve core, a valve is arranged on the secondary valve core, and the oil tank can be communicated with the valve of the secondary valve core.
In combination with the first aspect, in one implementation manner, a strip-shaped hole is formed in one end, far away from the top block, of the main valve core, a pin body is arranged in the strip-shaped hole in a penetrating mode, and the auxiliary valve core is connected with the pin body.
In combination with the first aspect, in one implementation manner, a spring sleeve and a valve core spring are installed outside the main valve core, a through hole is formed in the spring sleeve, the pin body is arranged in the through hole in a penetrating mode, and the valve core spring is located on one side, away from the top block, of the spring sleeve.
With reference to the first aspect, in one embodiment, a spring seat is mounted on the outer portion of the spring housing, and the spring seat covers the outer side of the pin body.
In combination with the first aspect, in an embodiment, a main valve core spring base is installed outside the spring seat, the valve core spring is accommodated in the main valve core spring base, and a wave spring is installed on one side of the spring seat, which is close to the top block.
With reference to the first aspect, in one implementation manner, a servo motor is installed in the valve body, and an output end of the servo motor is connected with the top block through a ball screw.
In a second aspect, an embodiment of the present application provides an unmanned aerial vehicle, which includes the passive direct-drive electrohydraulic brake servo valve.
With reference to the second aspect, in one embodiment, the clamping groove is annular and extends around the outer side of the main valve core in a circumferential manner; the main valve core passes through the opening to enter the cavity, and the opening extends to a direction close to the axis of the top block to form the clamping block.
With reference to the second aspect, in one embodiment, a card interface is disposed on an outer side of the cavity, the card interface is in communication with the cavity, and a width of the card interface is smaller than a diameter of the top block.
In combination with the second aspect, in one embodiment, an oil tank is mounted on the valve body, a secondary valve core is mounted inside the primary valve core, a valve is disposed on the secondary valve core, and the oil tank can be communicated with the valve of the secondary valve core.
In combination with the second aspect, in one implementation manner, a strip-shaped hole is formed in one end, far away from the top block, of the main valve core, a pin body is arranged in the strip-shaped hole in a penetrating mode, and the auxiliary valve core is connected with the pin body.
In combination with the second aspect, in one implementation manner, a spring sleeve and a valve core spring are installed outside the main valve core, a through hole is formed in the spring sleeve, the pin body is arranged in the through hole in a penetrating mode, and the valve core spring is located on one side, away from the top block, of the spring sleeve.
With reference to the second aspect, in one embodiment, a spring seat is mounted on the outside of the spring housing, and the spring seat covers the outside of the pin body.
In combination with the second aspect, in one embodiment, a main spool spring base is mounted outside the spring seat, the spool spring is accommodated in the main spool spring base, and a wave spring is mounted on a side of the spring seat near the top block.
With reference to the second aspect, in one embodiment, a servo motor is installed in the valve body, and an output end of the servo motor is connected with the top block through a ball screw.
The working principle of the oil injection valve of the passive direct-drive electrohydraulic brake servo valve provided by the embodiment of the invention is as follows:
Valve open state (oil replenishment): when the servo motor drives the planetary reducer ball screw module to drive the top block to move rightwards to trigger the micro switch, the servo motor stops rotating. The wave spring pushes the main valve core spring base to lean against the right end face of the valve body; because the elasticity of the wave spring is greater than the sum of the elasticity of the valve core spring and the elasticity of the auxiliary valve core spring, when the main valve core is driven by the jacking block to synchronously move rightwards, the spring sleeve is jacked on the inner end face of the base of the main valve core spring to link the spring seat and the pin body to compress the valve core spring to move leftwards, and when the pin body moves leftwards, the auxiliary valve core is pushed to compress the auxiliary valve core spring to open the conical valve on the auxiliary valve core, and at the moment, the oil in the oil tank is connected with the brake cavity at the front end of the valve body through the opened valve, so that the function of supplementing the oil for the brake cavity is realized.
Shutter closed state (braking state): when the servo motor rotates positively to drive the ball screw module of the planetary reducer to drive the ejector block to move leftwards, the main valve core is driven by the ejector block to synchronously move leftwards, the spring sleeve, the pin body and the spring seat move rightwards under the action of the elasticity of the valve core spring, and the auxiliary valve core moves rightwards under the action of the elasticity of the auxiliary valve core spring until the valve is closed, and the channels of the brake cavity and the oil tank are cut off. The brake cavity is in a closed state to realize the pressure boost of the brake cavity, and the pressure is transmitted to the brake load plunger to realize the brake function.
The flight control upper computer sends a braking instruction, the sensor feeds back a braking cavity pressure signal to the flight control upper computer, and when the pressure reaches the system setting, the servo motor stops rotating.
The technical scheme provided by the embodiment of the application has the beneficial effects that at least:
Through the connection of the main valve core and the top block, the main valve core is driven to move forward and reset directly through the top block, so that the synchronism of the movement of the two connecting pieces can be ensured, the cantilever end of the main valve core can be radially floated and positioned, the stability of the high-speed movement of the main valve core is ensured, the movement damping of the main valve core is reduced, the movement response speed of the main valve core is improved, and the lifting and depressurization response time of the whole brake system is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a passive direct-drive electro-hydraulic brake servo valve provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of the internal structure of a passive direct-drive electro-hydraulic brake servo valve according to an embodiment of the present invention;
FIG. 3 is an internal cross-sectional view of a passive direct-drive electro-hydraulic brake servo valve provided by an embodiment of the invention;
FIG. 4 is a schematic control block diagram of a passive direct-drive electro-hydraulic brake servo valve provided by an embodiment of the invention;
FIG. 5 is a system software workflow diagram of a passive direct-drive electro-hydraulic brake servo valve provided by an embodiment of the invention;
FIG. 6 is a flowchart of another system software operation of a passive direct-drive electro-hydraulic brake servo valve according to an embodiment of the present invention.
In the figure:
1. A valve body; 2. a main spool; 21. a clamping groove; 22. a bar-shaped hole; 3. a top block; 31. a clamping block; 32. a cavity; 33. an opening; 34. a card interface; 4. an oil tank; 5. a pin body; 6. a secondary valve core; 7. a spring sleeve; 71. a through hole; 8. a valve core spring; 9. a spring seat; 10. a main spool spring mount; 11. a wave spring; 12. a servo motor; 13. ball screw.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The embodiment of the application provides a passive direct-drive electro-hydraulic brake servo valve and an unmanned aerial vehicle, which can solve the problems that in the related art, in the process that a jacking block pushes a main valve core to move forwards, hydraulic pressure is needed to be overcome, the elastic force of a spring is needed to be overcome, the motion damping of the main valve core is greatly increased, the power of a servo motor is improved, the spring occupies part of the space for the main valve core to move, the main valve core cannot move to a limit position, the motion response speed of the main valve core is reduced, and the rising and falling response time of the whole brake system is reduced.
Fig. 1 and fig. 2 are diagrams showing a passive direct-drive electrohydraulic brake servo valve according to an embodiment of the present invention, which includes: a valve body 1; a main valve element 2 mounted in the valve body 1, wherein a clamping groove 21 is formed at one end of the main valve element 2; and one end of the top block 3 is provided with a clamping block 31, and the top block 3 is clamped in the clamping groove 21 of the main valve core 2 through the clamping block 31. In this embodiment, through setting up draw-in groove 21 in the one end of main valve core 2, set up assorted fixture block 31 in the one end of kicking block 3, the cooperation through fixture block 31 and draw-in groove 21 is connected with the joint between main valve core 2 and the kicking block 3, advance and the resettable of main valve core 2 are all directly realized through kicking block 3 drive, can not only ensure the synchronism of two connecting pieces motion, can also play radial floating location's effect to the cantilever end of main valve core 2, ensure the stationarity of main valve core 2 high-speed motion, help reducing the motion damping of main valve core 2, improve the motion response speed of main valve core 2, improve whole braking system and rise, step down response time.
Referring to fig. 2, in some embodiments, the clamping groove 21 is annular and extends around the outer side of the main valve core 2; the top block 3 is close to one end of the main valve core 2 and is provided with a cavity 32, one side of the cavity 32 is provided with an opening 33, the main valve core 2 passes through the opening 33 and enters the cavity 32, and the opening 33 extends to a direction close to the axis of the top block 3 to form the clamping block 31. In this embodiment, the cavity 32 is disposed at one end of the top block 3 near the main valve core 2, the opening 33 is disposed at one side of the cavity 32, the main valve core 2 passes through the opening 33 and enters the cavity 32, the opening 33 extends towards the direction near the axis of the top block 3 to form the clamping block 31, so that the connection between the clamping block 31 and the clamping groove 21 is more stable, the synchronism of the movement of the two connecting pieces can be further ensured in the process of both the advancing and resetting of the main valve core 2 through the driving of the top block 3, the radial floating positioning function is achieved on the cantilever end of the main valve core 2, the stability of the high-speed movement of the main valve core 2 is ensured, the movement damping of the main valve core 2 is further reduced, the movement response speed of the main valve core 2 is improved, the lifting and depressurization response time of the whole brake system is improved, the installation connection of two axial moving parts of the closed space is realized, the sealing requirement of the system cavity structure is satisfied, the assembly and the disassembly is simple and the maintenance requirement of the aviation system is satisfied.
Referring to fig. 2, in some embodiments, a card interface 34 is disposed on the outer side of the cavity 32, the card interface 34 communicates with the cavity 32, and the width of the card interface 34 is smaller than the diameter of the top block 3. In this embodiment, through set up draw-in interface 34 in the outside of cavity 32, can conveniently be connected the joint between main valve core 2 and kicking block 3, realized the installation connection of airtight space two axial motion parts, satisfy the airtight requirement of system cavity structure simultaneously, the assembly is convenient, dismantles, satisfies aviation system maintenance demand.
In summary, through adopting the couple that the cross-section is U type at the junction of main valve core 2 and kicking block 3 to carry out reasonable dimensional tolerance control to couple axial and radial fitting surface, not only can ensure the synchronism of two connecting pieces movements, can also ensure the synchronism of the axial motion of main valve core 2 and kicking block 3, can also play radial floating location's effect to the cantilever end of main valve core 2, ensure the stationarity of main valve core 2 high-speed motion, the improvement of stationarity helps reducing the motion damping of main valve core 2, finally improves the motion response speed of main valve core 2, improves whole braking system and rises, step-down response time (this index is the important index of measuring braking system performance). The installation connection of two axial moving parts in the closed space is realized, the closed requirement of the system cavity structure is met, the assembly and the disassembly are simple and convenient, and the maintenance requirement of an aviation system is met.
Referring to fig. 1 and 3, in some embodiments, the oil tank 4 is mounted on the valve body 1, the auxiliary valve core 6 is mounted inside the main valve core 2, a valve is disposed on the auxiliary valve core 6, and the oil tank 4 can be communicated with the valve of the auxiliary valve core 6. In this embodiment, by installing the oil tank 4 on the valve body 1, the oil flow in the oil tank 4 can enter the working chamber of the brake valve through the valve of the auxiliary valve core 6, so as to realize the replenishment of oil, thereby preparing for the next operation.
Referring to fig. 1 and 3, in some embodiments, a strip-shaped hole 22 is provided at an end of the main valve core 2 away from the top block 3, a pin body 5 is penetrated in the strip-shaped hole 22, and the auxiliary valve core 6 is connected with the pin body 5. The outside of main valve core 2 installs spring housing 7 and case spring 8, set up through-hole 71 on the spring housing 7, the round pin body 5 wears to locate in the through-hole 71, case spring 8 is located the spring housing 7 is kept away from the one side of kicking block 3. The spring housing 7 is externally provided with a spring seat 9, and the spring seat 9 covers the outer side of the pin body 5. The main valve core spring base 10 is arranged outside the spring seat 9, the valve core spring 8 is accommodated in the main valve core spring base 10, and the wave spring 11 is arranged on one side, close to the top block 3, of the spring seat 9. A servo motor 12 is arranged in the valve body 1, and the output end of the servo motor 12 is connected with the top block 3 through a ball screw 13. When in operation, the valve is in an open state (oil supplementing): when the servo motor 12 drives the planetary reducer ball screw module to drive the top block 3 to move rightwards to trigger the micro switch, the servo motor 12 stops rotating. The wave spring 11 pushes the main valve core spring base 10 to lean against the right end face of the valve body 1; because the elasticity of the wave spring 11 is greater than the sum of the elasticity of the valve core spring 8 and the elasticity of the auxiliary valve core spring, when the main valve core 2 is driven by the jacking block 3 to synchronously move rightward, the spring sleeve 7 is jacked on the inner end face of the main valve core spring base 10 to link the spring seat 9 and the pin body 5 to compress the valve core spring 8 to move leftward, and when the pin body 5 moves leftward, the auxiliary valve core 6 is pushed to compress the auxiliary valve core spring to open the conical valve on the auxiliary valve core 6, and at the moment, the oil in the oil tank 4 is connected with the brake cavity at the front end of the valve body 1 through the opened valve, so that the function of supplementing the oil to the brake cavity is realized.
Shutter closed state (braking state): when the servo motor 12 rotates positively to drive the planetary reducer ball screw module to drive the top block 3 to move leftwards, the main valve core 2 is driven by the top block 3 to synchronously move leftwards, the spring sleeve 7, the pin body 5 and the spring seat 9 move rightwards under the elastic force of the valve core spring 8, and the auxiliary valve core 6 moves rightwards under the elastic force of the auxiliary valve core spring until the valve is closed, so that the channels between the brake cavity and the oil tank 4 are cut off. The brake cavity is in a closed state to realize the pressure boost of the brake cavity, and the pressure is transmitted to the brake load plunger to realize the brake function.
The flight control upper computer sends a braking instruction, the sensor feeds back a braking cavity pressure signal to the flight control upper computer, and when the pressure reaches the system setting, the servo motor 12 stops rotating.
The embodiment of the invention also provides an unmanned aerial vehicle which comprises the passive direct-drive electrohydraulic brake servo valve. Through setting up draw-in groove 21 in the one end of main valve core 2, set up assorted fixture block 31 in the one end of kicking block 3, the cooperation through fixture block 31 and draw-in groove 21 is connected with the joint between main valve core 2 and the kicking block 3, advance and the reposition of main valve core 2 are all directly realized through kicking block 3 drive, not only can ensure the synchronism of two connecting pieces motion, can also play radial floating location's effect to the cantilever end of main valve core 2, ensure the stationarity of main valve core 2 high-speed motion, help reducing the motion damping of main valve core 2, improve the motion response speed of main valve core 2, improve whole braking system and rise, step down response time.
Referring to fig. 4, 5 and 6, the control principle of the passive direct-drive electrohydraulic brake servo valve provided by the embodiment of the invention is as follows:
The aircraft brake operator sends a brake command signal to a brake valve controller through a flight control upper computer, the brake valve controller outputs a corresponding PWM control signal to a servo motor of a passive direct-drive electro-hydraulic brake valve according to the magnitude of the command signal, the servo motor realizes rotation speed and torque output according to the PWM signal, the output torque outputs thrust through a planetary gear speed reducing mechanism, a lead screw and a push rod, the main valve core of the brake valve is pushed to act to form the change of the volume of a brake cavity of the brake valve, and brake oil is output to an aircraft wheel brake actuator, so that a brake function is finally realized. The electrohydraulic brake valve is provided with an oil storage tank, can be used for supplementing oil in a brake system, and a pressure sensor collects a pressure signal and feeds the pressure signal back to the flight control upper computer, so that the normal use requirement of an airplane is met.
On the basis of meeting the intelligent anti-skid braking performance, the hydraulic control system replaces the original complex aircraft braking control system consisting of an oil source, a control hydraulic element (a servo valve) and a closed-loop controller. Low failure rate the debugging, installation and maintenance are convenient. The power consumption is far lower than that of the existing braking system. The control mode is flexible, the angular displacement encoder is additionally arranged on various servo motors, and the redundancy and multi-mode flexible control can be performed according to the system requirements; the system CAN be matched with various communication interfaces such as PWM, 422, 485, CAN and the like for implementation according to the need. The pressure output of the high-precision braking cavity adopts closed-loop control, the control precision of the system pressure can reach +/-0.05 MPa, the response speed is high, and the step response time of the system braking pressure can basically meet the requirement of the anti-skid braking system within 10 Hz. The servo motor control board accumulates the design of a mature military servo control application system, is provided with a perfect redundancy protection mechanism, and has good safety performance; the auxiliary test device has the advantages of being strong in function, capable of conveniently realizing data interaction and control, and capable of being used by an upper computer.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that in the present application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A passive direct drive electro-hydraulic brake servo valve, comprising:
A valve body (1);
A main valve core (2) which is installed in the valve body (1), wherein a clamping groove (21) is arranged at one end of the main valve core (2);
A clamping block (31) is arranged at one end of the jacking block (3), and the jacking block (3) is clamped in a clamping groove (21) of the main valve core (2) through the clamping block (31);
An oil tank (4) is mounted on the valve body (1), a secondary valve core (6) is mounted in the main valve core (2), a valve is arranged on the secondary valve core (6), and the oil tank (4) can be communicated with the valve of the secondary valve core (6);
a strip-shaped hole (22) is formed in one end, far away from the top block (3), of the main valve core (2), a pin body (5) is arranged in the strip-shaped hole (22) in a penetrating mode, and the auxiliary valve core (6) is connected with the pin body (5);
The outside of the main valve core (2) is provided with a spring sleeve (7) and a valve core spring (8), the spring sleeve (7) is provided with a through hole (71), the pin body (5) is arranged in the through hole (71) in a penetrating way, and the valve core spring (8) is positioned at one side, far away from the top block (3), of the spring sleeve (7);
A spring seat (9) is arranged outside the spring sleeve (7), and the spring seat (9) covers the outer side of the pin body (5);
The outside of spring holder (9) is installed main valve core spring base (10), case spring (8) hold in main valve core spring base (10), spring holder (9) are close to one side of kicking block (3) installs wave spring (11).
2. The passive direct-drive electro-hydraulic brake servo valve of claim 1, wherein:
The clamping groove (21) is annular and extends around the outer side of the main valve core (2) in a circle;
The one end that kicking block (3) is close to kicking block (2) is equipped with cavity (32), one side of cavity (32) is equipped with opening (33), main valve core (2) pass opening (33) get into in cavity (32), opening (33) are to being close to the direction of kicking block (3) axis extends formation fixture block (31).
3. The passive direct-drive electro-hydraulic brake servo valve of claim 2, wherein:
the outside of cavity (32) is equipped with draw-in groove mouth (34), draw-in groove mouth (34) with cavity (32) intercommunication, the width of draw-in groove mouth (34) is less than the diameter of kicking block (3).
4. The passive direct-drive electro-hydraulic brake servo valve of claim 1, wherein:
A servo motor (12) is arranged in the valve body (1), and the output end of the servo motor (12) is connected with the top block (3) through a ball screw (13).
5. An unmanned aerial vehicle, comprising the passive direct-drive electrohydraulic brake servo valve of any of claims 1 to 4.
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| CN109018315A (en) * | 2018-08-08 | 2018-12-18 | 北京特种机械研究所 | A kind of braking method of the electro-hydraulic brake valve of unmanned plane undercarriage |
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| JPH10176701A (en) * | 1997-10-31 | 1998-06-30 | Hitachi Ltd | Direct acting type servo valve |
| CN202038304U (en) * | 2011-04-28 | 2011-11-16 | 清华大学 | Brake executing mechanism adopting central valve piston |
| CN205136188U (en) * | 2015-10-29 | 2016-04-06 | 上海积健精密机械有限公司 | Servo motor directly drives type servovalve |
| CN110374949B (en) * | 2018-04-13 | 2020-12-04 | 丹佛斯动力系统（浙江）有限公司 | Valve and hydraulic system with same |
| CN110319067B (en) * | 2019-08-05 | 2024-03-22 | 安徽理工大学 | Dual-motor-based proportional flow control and high-speed switch dual-purpose valve |
| CN112555426B (en) * | 2020-12-07 | 2022-05-10 | 西安航天动力研究所 | Double-control valve with high reliability for cabin double-pressure |
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| CN115854097A (en) * | 2022-12-26 | 2023-03-28 | 建德市安泰科技咨询有限公司 | Power-down compensation mechanism of ultrasonic motor direct-drive two-dimensional electro-hydraulic servo valve |
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| CN103090048A (en) * | 2011-10-27 | 2013-05-08 | 北京精密机电控制设备研究所 | High-flow direct-drive digital servo valve |
| CN109018315A (en) * | 2018-08-08 | 2018-12-18 | 北京特种机械研究所 | A kind of braking method of the electro-hydraulic brake valve of unmanned plane undercarriage |
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| CN117681844A (en) | 2024-03-12 |
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