CN109018315A - A kind of braking method of the electro-hydraulic brake valve of unmanned plane undercarriage - Google Patents
A kind of braking method of the electro-hydraulic brake valve of unmanned plane undercarriage Download PDFInfo
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- CN109018315A CN109018315A CN201810895894.3A CN201810895894A CN109018315A CN 109018315 A CN109018315 A CN 109018315A CN 201810895894 A CN201810895894 A CN 201810895894A CN 109018315 A CN109018315 A CN 109018315A
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- limit
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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
- B64C25/44—Actuating mechanisms
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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
- B60T13/12—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 the fluid being liquid
-
- 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
- B60T13/74—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 electrical assistance or drive
-
- 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
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Aviation & Aerospace Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The present invention relates to a kind of braking methods of the electro-hydraulic brake valve of unmanned plane undercarriage, are related to Flight Vehicle Design, technical field of fluid transmission.The present invention can be avoided the problem of existing brake valve easily causes frictionally damage because of the frequent via hole of sealing element, and the influence for overcoming existing brake valve to response to which that speed, precision and energy loss are generated because of intermediate mechanical transmission link, and structure is simple, is easy installation maintenance, it is remarkably improved control precision, transmission efficiency and the sealing reliability of brake valve, ensures the flight safety of unmanned plane.
Description
Technical field
The present invention relates to Flight Vehicle Designs, technical field of fluid transmission, and in particular to a kind of unmanned plane undercarriage it is electro-hydraulic
The braking method of brake valve.
Background technique
Unmanned plane undercarriage plays key player when unmanned plane takes off landing, the sliding race of land and ground taxi.Generally
For, unmanned plane undercarriage mainly includes that wheel, damper, extension and retraction system, turning subtract oscillator system and brake system etc..Wherein,
Brake system is the important brake apparatus of unmanned plane, absorbs the sliding kinetic energy run of unmanned plane in UAV Landing, coast period, makes nothing
Man-machine quick reduction speed achievees the purpose that shorten ground run distance.Since the UAV Landing brake duration is short, working environment
Complexity, while being influenced by outwardly and inwardly various uncertain factors, it is safe and reliable to it requires that its brake system allows for
Work.Core component of the brake valve as unmanned plane undercarriage brake system, performance quality directly affect undercarriage brake
The reliability and success rate of braking.Therefore, the reliability and service life for how improving brake valve, for improving flying for unmanned plane
Row safety is of great significance.
The simplification structure of existing unmanned plane undercarriage brake valve is as shown in Figure 1, its main structure is: piston cylinder 101
It is radially provided with through-hole, to realize the oil-filled function of valve, Y type rubber cup 102 is installed between piston and piston cylinder 101, with
It realizes dynamic sealing and controls oil-filled on-off；In addition, the straight reciprocating motion of piston rod 103 will be rotated by ball-screw 104
The rotary motion of motor 105 is converted into linear motion to realize.Piston rod is pushed by roller screw 104 in rotating electric machine 105
During 103 extensions, working volumes and fuel feed hole are separated first and (control oil-filled on-off) by rubber cup 102, hold work
Chamber is in air-tight state, and when piston rod 103 continues extension, the volume of closed working volumes reduces, and oil liquid is increased by compression oil pressure.
The valve has certain self-sealing function, and as working volumes pressure increases, 102 leakproofness of rubber cup is better.However, rubber
Leather cup 102 is in order to control oil-filled on-off, and when being axially moved, inner rim or outer rim just have to pass through fuel feed hole, the frequency of brake valve
Numerous work leads to the frequent via hole of rubber cup 102, and frequent via hole easily leads to the fretting wear of rubber cup 102, seriously
Influence the sealing reliability and service life of brake valve.
In addition, need to increase intermediate mechanical transmission link i.e. ball-screw 104 between piston rod 103 and rotating electric machine 105,
Rotary motion could be converted to linear motion, increasing for intermediate transmission link can response speed, control precision to brake valve
It is had an impact with energy loss.Therefore, it is necessary to develop a kind of novel electro-hydraulic brake valve arrangement, existing brake valve is on the one hand avoided
Sealing part abrasion caused by frequent operation improves leakproofness, service life and the unmanned plane during flying safety of brake valve；Another party
Face overcomes existing brake valve to bring because of intermediate mechanical transmission link to brake valve response speed, control precision and energy loss etc.
Influence, keep the structure of valve simpler, speed, precision and the efficiency of transmission all significantly improve.
Summary of the invention
(1) technical problems to be solved
The technical problem to be solved by the present invention is how to provide a kind of system of the novel electro-hydraulic brake valve of unmanned plane undercarriage
Dynamic method influences the leakproofness of brake valve and makes to avoid existing brake valve because the frequent via hole of sealing element easily causes frictionally damage
The problem of with the service life, and existing brake valve is overcome to response to which speed, precision and energy loss because of intermediate mechanical transmission link
Deng influence.
(2) technical solution
In order to solve the above-mentioned technical problems, the present invention provides a kind of braking sides of the electro-hydraulic brake valve of unmanned plane undercarriage
Method, including oil storage cup 1, shell 3, bushing 5, gland 6, end cap 8, piston rod 9, voice coil motor 10, screw 11, limit support 13,
Gag lever post 14, sleeve 15, limit spring 16, cone valve component 19, adapter tube nozzle 21, pressure sensor 22, baffle ring 24；
Wherein, oil storage cup 1, which is connected through a screw thread, is mounted on shell 3, and by a sealing element axial seal；Columnar lining
It covers 5 tops to protrude into inside shell 3, and is sealed with the inner wall of shell 3 by the first sealing ring, 5 tail end of bushing is radially even to be opened
There is the aperture inside several communication oil storage cups 1 and shell 3；9 head of piston rod is thicker, and neck and tail portion are thinner, and head is along center
Line is provided with the small stepped hole of outer imperial palace, and neck radially has the oil-through-hole and rectangular channel communicated with head stepped hole, tail
Portion is provided with threaded hole along center line, and 9 head of piston rod is protruded into bushing 5, and is sealed with bushing 5 by one the 4th sealing ring, living
Cone valve component 19 is installed in the macropore of the stepped hole on 9 head of stopper rod；Limit support 13 be in round flange plate-like, at the top of outer circle compared with
Small, the outer circle of bottom is larger, and 13 top of limit support is radially provided with rectangular channel corresponding with 9 neck rectangular channel of piston rod；
Limit spring 16, limit support 13, gland 6, end cap 8 are successively inserted in 9 neck of piston rod, limit spring 16 by 9 tail portion of piston rod
One end be pressed on the bar shoulder on 9 head of piston rod, the other end is pressed on the end face at limit support 13 top；Cylindric gland 6
One end be pressed on 5 tail end end face of bushing, the inner hole of gland 6 and piston rod 9 are sealed by a third sealing ring, gland 6 outside
Circle is connected through a screw thread with shell 3, and is sealed by one second sealing ring；End cap 8 is fixed on shell 3；Gag lever post 14 penetrates
It limits in rectangular channel corresponding to support 13 and piston rod 9, the periphery at 13 top of inner wall and limit support of sleeve 15 passes through spiral shell
Line connection；For 10 sets of voice coil motor of hollow form in 9 tail portion of piston rod, the armature of voice coil motor 10 is mounted on 9 tail portion of piston rod
In threaded hole, the shell of voice coil motor 10 connect fastening by screw 11 with shell 3；
The cone valve component 19 is made of valve pocket 19.1, spool 19.2, compressed spring 19.3, pedestal 19.4, valve pocket 19.1
It is sealed between the macropore of 9 head stepped hole of piston rod by one the 5th sealing ring, the bottom of spool 19.2 is frustum cone structure, circle
The bottom surface of platform is equipped with guide and limit bar, and guide and limit bar protrudes into the aperture of 9 head stepped hole of piston rod, the inside of spool 19.2
Compressed spring 19.3 is installed, one end of compressed spring 19.3 is limited by spool 19.2, and the other end with valve pocket 19.1 by being threadedly coupled
Pedestal 19.4 limit, pedestal 19.4 is provided with through-hole along center line；
In the novel electro-hydraulic brake valve of the unmanned plane undercarriage, adapter tube nozzle 21, which is connected through a screw thread, is mounted on shell 3
On, and sealed by the second gasket 20；
In the novel electro-hydraulic brake valve of the unmanned plane undercarriage, pressure sensor 22 is mounted on shell 3, the two it
Between sealed by one the 6th sealing ring 23, and compressed by baffle ring 24, baffle ring 24 and shell 3 are connected through a screw thread fastening；
The braking method the following steps are included:
When unmanned plane undercarriage needs work, make voice coil motor 10 that piston rod 9 be driven to forward extend out, and drive piston rod
Cone valve component 19 in the macropore of 9 stepped holes travels forward together, and gag lever post 14 also travels forward together with limit support 13,
When piston rod 9 travels forward certain stroke, limit support 13 and gland 6 are disengaged, and branch is limited under the action of limit spring 16
Seat 13 and gag lever post 14 move backward round about relative to piston rod 9, valve pocket 19.1 and spool in cone valve component 19
19.2 start to contact, and form linear sealing under the action of compressed spring 19.3, with piston rod 9 and cone valve component 19 continue to
Preceding movement, the pressure inside spool 19.2 linked up with brake valve working chamber increase, the pressure between spool 19.2 and valve pocket 19.1
Clamp force is bigger, and sealing is more reliable, and brake valve working chamber exports higher oil liquid pressure for brake by adapter tube nozzle 21；
When unmanned plane undercarriage needs to stop working, voice coil motor 10 is made to drive piston rod 9,19 receding of cone valve component
It returns, brake valve work cavity pressure is gradually reduced, in the initial stage because the effect spool 19.2 of compressed spring 19.3 still can be pressed in
It seals on valve pocket 19.1, the continuation of piston rod 9 moves backward, and limit support 13 is contacted with gland 6, and limit support 13 drives
Gag lever post 14 overcomes 16 active force of limit spring to move round about relative to piston rod 9 and cone valve component 19, gag lever post 14
It contacts with the guide and limit bar of 19.2 bottom surface of spool and travels forward with movable valve plug 19.2 relative to valve pocket 19.1, promote spool
19.2 overcome the active force of compressed spring 19.3 with valve pocket 19.1 and disengage, and the oil liquid in oil storage cup 1 successively flows through 5 tail end of bushing
Aperture, the oil-through-hole of piston rod 9 neck radial direction, the gap between spool 19.2 and valve pocket 19.1,19.4 center line of pedestal it is logical
Hole and the working chamber for entering brake valve, realize the supplement of oil liquid, to be ready for next task.
Preferably, the first seal is gasket.
Preferably, the first seal is O-ring seal.
Preferably, first sealing ring is O-ring seal.
Preferably, second sealing ring is O-ring seal.
Preferably, the third sealing ring is O-ring seal.
Preferably, the 4th sealing ring is O-ring seal.
Preferably, the 5th sealing ring is O-ring seal.
Preferably, the 6th sealing ring is O-ring seal.
(3) beneficial effect
Because of the frequent via hole of sealing element when the present invention avoids the work of existing brake valve by completely new principle design, it is easy to make
At frictionally damage, leakproofness, service life and the unmanned plane during flying safety of brake valve are significantly improved；Overcome existing brake valve
Because intermediate mechanical transmission link influences brake valve response speed, the control brings such as precision and energy loss, structure is more
Simply, it is easy installation maintenance, speed, precision and the efficiency of transmission are all significantly improved.
Detailed description of the invention
Fig. 1 is the structure diagram of conventional brake valve；
Fig. 2 is the cross-sectional view of electro-hydraulic brake valve designed by braking method to realize the present invention；
Fig. 3 is the portion A enlarged drawing in Fig. 2.
Wherein, 1- oil storage cup, the first gasket of 2-, 3- shell, the first O-ring of 4-, 5- bushing, 6- gland, the 2nd O shape of 7-
Circle, 8- end cap, 9- piston rod, 10- voice coil motor, 11- screw, 12- third O-ring, 13- limit support, 14- gag lever post, 15-
Sleeve, 16- limit spring, the 4th O-ring of 17-, the 5th O-ring of 18-, 19- cone valve component, 19.1- valve pocket, 19.2- spool,
19.3- compressed spring, 19.4- pedestal, the second gasket of 20-, 21- adapter tube nozzle, 22- pressure sensor, the 6th O-ring of 23-,
24- baffle ring.
Specific embodiment
To keep the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to of the invention
Specific embodiment is described in further detail.
The present invention provides a kind of braking method of the electro-hydraulic brake valve of unmanned plane undercarriage, and this method is based on a kind of electro-hydraulic brake
Vehicle valve is realized, as shown in Fig. 2, the electro-hydraulic brake valve includes oil storage cup 1, shell 3, bushing 5, gland 6, end cap 8, piston rod 9, sound
Enclose motor 10, screw 11, limit support 13, gag lever post 14, sleeve 15, limit spring 16, cone valve component 19, adapter tube nozzle 21, pressure
Force snesor 22, the O-ring of baffle ring 24 and different size, gasket etc..
Wherein, oil storage cup 1, which is connected through a screw thread, is mounted on shell 3, and is sealed by gasket 2；Columnar bushing 5 pushes up
End is protruded into inside shell 3, and with the inner wall of shell 3 by the sealing of the first O-ring 4,5 tail end of bushing is radially even be provided with it is several
Link up the aperture inside oil storage cup 1 and shell 3；9 head of piston rod is thicker, and neck and tail portion are thinner, and head is provided with along center line
The small stepped hole of outer imperial palace, neck radially have the oil-through-hole and rectangular channel communicated with head stepped hole, and tail portion is in
Heart line is provided with threaded hole, and 9 head of piston rod is protruded into bushing 5, and is sealed with bushing 5 by the 4th O-ring 17,9, piston rod
Cone valve component 19 is installed in the macropore of the stepped hole in portion；Limit support 13 be in round flange plate-like, at the top of outer circle it is smaller, bottom
Outer circle it is larger, limit support 13 top is radially provided with the corresponding square of radial position corresponding with 9 neck rectangular channel of piston rod
Shape slot；Limit spring 16, limit support 13, gland 6, end cap 8 are successively inserted in 9 neck of piston rod by 9 tail portion of piston rod, limit bullet
One end of spring 16 is pressed on the bar shoulder on 9 head of piston rod, and the other end is pressed on the end face at 13 top of limit support；Cylindric pressure
One end of lid 6 is pressed on 5 tail end end face of bushing, and the inner hole and piston rod 9 of gland 6 are sealed by third O-ring 12, gland 6
Outer circle is connected through a screw thread with shell 3, and is sealed by the second O-ring 7；End cap 8 is fixed on shell 3；Gag lever post 14 penetrates
It limits in rectangular channel corresponding to support 13 and piston rod 9, the periphery at 13 top of inner wall and limit support of sleeve 15 passes through spiral shell
Line connection；For 10 sets of voice coil motor of hollow form in 9 tail portion of piston rod, the armature of voice coil motor 10 is mounted on 9 tail portion of piston rod
In threaded hole, the shell of voice coil motor 10 connect fastening by screw 11 with shell 3；
As shown in figure 3, in the novel electro-hydraulic brake valve of the unmanned plane undercarriage, cone valve component 19 by valve pocket 19.1,
Spool 19.2, compressed spring 19.3, pedestal 19.4 form, and pass through between the macropore of 9 head stepped hole of valve pocket 19.1 and piston rod
The sealing of 5th O-ring 18, the bottom of spool 19.2 are frustum cone structure, and the bottom surface of rotary table is equipped with guide and limit bar, guide and limit bar
It protrudes into the aperture of 9 head stepped hole of piston rod, the inside installation compressed spring 19.3 of spool 19.2, the one of compressed spring 19.3
End is limited by spool 19.2, and the other end is limited by the pedestal 19.4 being threadedly coupled with valve pocket 19.1, and pedestal 19.4 is opened along center line
There is through-hole；
In the novel electro-hydraulic brake valve of the unmanned plane undercarriage, adapter tube nozzle 21, which is connected through a screw thread, is mounted on shell 3
On, and sealed by the second gasket 20；
In the novel electro-hydraulic brake valve of the unmanned plane undercarriage, pressure sensor 22 is mounted on shell 3, the two it
Between sealed by the 6th O-ring 23, and compressed by baffle ring 24, baffle ring 24 and shell 3 are connected through a screw thread fastening；
In the novel electro-hydraulic brake valve of the unmanned plane undercarriage, it is not limited between oil storage cup 1 and shell 3 by
The sealing of one gasket 2, can also take O-ring axial seal or other sealing means.
The braking method that electro-hydraulic brake valve based on the unmanned plane undercarriage is realized, comprising the following steps:
When unmanned plane undercarriage needs work, voice coil motor 10 drives piston rod 9 to forward extend out, and drives piston rod 9
Cone valve component 19 in the macropore of stepped hole travels forward together, and gag lever post 14 also travels forward together with limit support 13,
When piston rod 9 travels forward certain stroke, limit support 13 and gland 6 are disengaged, and branch is limited under the action of limit spring 16
Seat 13 and gag lever post 14 move backward round about relative to piston rod 9, valve pocket 19.1 and spool in cone valve component 19
19.2 start to contact, and form linear sealing under the action of compressed spring 19.3, with piston rod 9 and cone valve component 19 continue to
Preceding movement, the pressure inside spool 19.2 linked up with brake valve working chamber increase, the pressure between spool 19.2 and valve pocket 19.1
Clamp force is bigger, and sealing is more reliable, and brake valve working chamber exports higher oil liquid pressure for brake by adapter tube nozzle 21.
When unmanned plane undercarriage needs to stop working, voice coil motor 10 drives piston rod 9,19 receding of cone valve component
It returns, brake valve work cavity pressure is gradually reduced, in the initial stage because the effect spool 19.2 of compressed spring 19.3 still can be pressed in
It seals on valve pocket 19.1, the continuation of piston rod 9 moves backward, and limit support 13 is contacted with gland 6, and limit support 13 drives
Gag lever post 14 overcomes 16 active force of limit spring to move round about relative to piston rod 9 and cone valve component 19, gag lever post 14
It contacts with the guide and limit bar of 19.2 bottom surface of spool and travels forward with movable valve plug 19.2 relative to valve pocket 19.1, promote spool
19.2 overcome the active force of compressed spring 19.3 with valve pocket 19.1 and disengage, and the oil liquid in oil storage cup 1 successively flows through 5 tail end of bushing
Aperture, the oil-through-hole of piston rod 9 neck radial direction, the gap between spool 19.2 and valve pocket 19.1,19.4 center line of pedestal it is logical
Hole and the working chamber for entering brake valve, realize the supplement of oil liquid, to be ready for next task.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of braking method of the electro-hydraulic brake valve of unmanned plane undercarriage, which is characterized in that the electro-hydraulic brake valve includes storage
Lubricating cup (1), shell (3), bushing (5), gland (6), end cap (8), piston rod (9), voice coil motor (10), screw (11), limit
Support (13), gag lever post (14), sleeve (15), limit spring (16), cone valve component (19), adapter tube nozzle (21), pressure sensor
(22), baffle ring (24)；
Wherein, oil storage cup (1), which is connected through a screw thread, is mounted on shell (3), and by a sealing element axial seal；Columnar lining
It is internal that shell (3) is protruded on set (5) top, and is sealed with the inner wall of shell (3) by the first sealing ring, and bushing (5) tail end is along diameter
To the aperture for being uniformly provided with several communications oil storage cup (1) and shell (3) inside；Piston rod (9) head is thicker, neck and tail portion compared with
Carefully, head is provided with the small stepped hole of outer imperial palace along center line, and neck radially has the logical oil communicated with head stepped hole
Hole and rectangular channel, tail portion are provided with threaded hole along center line, and piston rod (9) head is protruded into bushing (5), and is passed through with bushing (5)
The sealing of one the 4th sealing ring, the macropore of the stepped hole on piston rod (9) head is interior to install cone valve component (19)；Limiting support (13) is in
Round flange plate-like, at the top of outer circle it is smaller, the outer circle of bottom is larger, is radially provided with and piston rod at the top of limit support (13)
(9) the corresponding rectangular channel of neck rectangular channel；Limit spring (16), limit support (13), gland (6), end cap (8) are successively by living
Piston rod (9) neck is inserted in stopper rod (9) tail portion, and one end of limit spring (16) is pressed on the bar shoulder on piston rod (9) head, another
Side pressure is on the end face at the top of limit support (13)；One end of cylindric gland (6) is pressed on bushing (5) tail end end face, is pressed
The inner hole and piston rod (9) for covering (6) are sealed by a third sealing ring, and the outer circle of gland (6) and shell (3) are connected by screw thread
It connects, and is sealed by one second sealing ring；End cap (8) is fixed on shell (3)；Gag lever post (14) penetrate limit support (13) and
In rectangular channel corresponding to piston rod (9), inner wall and the periphery at the top of limit support (13) of sleeve (15) are connected through a screw thread；
The voice coil motor (10) of hollow form is covered in piston rod (9) tail portion, and the armature of voice coil motor (10) is mounted on piston rod (9) tail portion
In threaded hole, the shell of voice coil motor (10) connect fastening by screw (11) with shell (3)；
The cone valve component (19) is made of valve pocket (19.1), spool (19.2), compressed spring (19.3), pedestal (19.4), valve
It covers and is sealed between the macropore of (19.1) and piston rod (9) head stepped hole by one the 5th sealing ring, the bottom of spool (19.2)
Bottom surface for frustum cone structure, rotary table is equipped with guide and limit bar, and guide and limit bar protrudes into the aperture of piston rod (9) head stepped hole
Interior, compressed spring (19.3) are installed in the inside of spool (19.2), and one end of compressed spring (19.3) is limited by spool (19.2), separately
One end is limited by the pedestal (19.4) being threadedly coupled with valve pocket (19.1), and pedestal (19.4) is provided with through-hole along center line；
The adapter tube nozzle (21), which is connected through a screw thread, to be mounted on shell (3), and is sealed by the second gasket (20)；
The pressure sensor (22) is mounted on shell (3), is sealed between the two by one the 6th sealing ring (23), and pass through
Baffle ring (24) compresses, and baffle ring (24) and shell (3) are connected through a screw thread fastening；
The braking method the following steps are included:
When unmanned plane undercarriage needs work, forward extend out voice coil motor (10) driving piston rod (9), and drive piston rod
(9) the cone valve component (19) in the macropore of stepped hole travels forward together, and gag lever post (14) is together with limit support (13)
It travels forward, when piston rod (9) travels forward certain stroke, limit support (13) and gland (6) are disengaged, in limit spring
(16) support (13) are limited under the action of and gag lever post (14) moves backward round about relative to piston rod (9), cone valve group
Valve pocket (19.1) in part (19) starts to contact with spool (19.2), and formation line is close under the action of compressed spring (19.3)
Envelope, as piston rod (9) and cone valve component (19) move forward, the spool (19.2) linked up with brake valve working chamber is internal
Pressure increase, brake valve working chamber exports higher oil liquid pressure for brake by adapter tube nozzle (21)；
When unmanned plane undercarriage needs to stop working, voice coil motor (10) is made to drive piston rod (9), cone valve component (19) backward
Retract, brake valve work cavity pressure be gradually reduced, the initial stage because compressed spring (19.3) effect spool (19.2) still
It can be pressed on valve pocket (19.1) and seal, piston rod (9) continuation moves backward, and limit support (13) is contacted with gland (6),
Limit support (13) drives gag lever post (14) to overcome limit spring (16) active force relative to piston rod (9) and cone valve component (19)
It moves round about, gag lever post (14) contacts and opposite with movable valve plug (19.2) with the guide and limit bar of spool (19.2) bottom surface
It travels forward in valve pocket (19.1), spool (19.2) and valve pocket (19.1) is promoted to overcome the active force of compressed spring (19.3) and take off
It opens, the oil liquid in oil storage cup (1) successively flows through oil-through-hole, the spool of the aperture of bushing (5) tail end, piston rod (9) neck radial direction
(19.2) gap between valve pocket (19.1), pedestal (19.4) center line through-hole and enter brake valve working chamber, realize oil
The supplement of liquid, to be ready for next task.
2. the method as described in claim 1, which is characterized in that the first seal is gasket.
3. the method as described in claim 1, which is characterized in that the first seal is O-ring seal.
4. the method as described in claim 1, which is characterized in that first sealing ring is O-ring seal.
5. the method as described in claim 1, which is characterized in that second sealing ring is O-ring seal.
6. the method as described in claim 1, which is characterized in that the third sealing ring is O-ring seal.
7. the method as described in claim 1, which is characterized in that the 4th sealing ring is O-ring seal.
8. the method as described in claim 1, which is characterized in that the 5th sealing ring is O-ring seal.
9. such as method described in any item of the claim 1 to 8, which is characterized in that the 6th sealing ring is O-ring seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810895894.3A CN109018315B (en) | 2018-08-08 | 2018-08-08 | Braking method of electro-hydraulic brake valve of unmanned aerial vehicle undercarriage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810895894.3A CN109018315B (en) | 2018-08-08 | 2018-08-08 | Braking method of electro-hydraulic brake valve of unmanned aerial vehicle undercarriage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109018315A true CN109018315A (en) | 2018-12-18 |
| CN109018315B CN109018315B (en) | 2020-06-09 |
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ID=64649493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810895894.3A Active CN109018315B (en) | 2018-08-08 | 2018-08-08 | Braking method of electro-hydraulic brake valve of unmanned aerial vehicle undercarriage |
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| CN109760825A (en) * | 2019-01-30 | 2019-05-17 | 西安航空制动科技有限公司 | A kind of steerable electrohydraulic servo valve |
| CN111120455A (en) * | 2019-12-24 | 2020-05-08 | 安徽博微联控科技有限公司 | Quick-insertion and time-delay separation device |
| CN114030599A (en) * | 2021-11-19 | 2022-02-11 | 浙江省涡轮机械与推进系统研究院 | Manual locking structure of fixed wing aircraft brake and fixed wing aircraft |
| CN117681844A (en) * | 2023-12-28 | 2024-03-12 | 襄阳航宇机电液压应用技术有限公司 | Passive direct-drive electrohydraulic brake servo valve and unmanned aerial vehicle |
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| CN109760825A (en) * | 2019-01-30 | 2019-05-17 | 西安航空制动科技有限公司 | A kind of steerable electrohydraulic servo valve |
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| CN114030599B (en) * | 2021-11-19 | 2024-04-19 | 浙江省涡轮机械与推进系统研究院 | Fixed wing aircraft brake manual locking structure and fixed wing aircraft |
| CN117681844A (en) * | 2023-12-28 | 2024-03-12 | 襄阳航宇机电液压应用技术有限公司 | Passive direct-drive electrohydraulic brake servo valve and unmanned aerial vehicle |
| CN117681844B (en) * | 2023-12-28 | 2024-09-17 | 襄阳航宇机电液压应用技术有限公司 | Passive direct-drive electrohydraulic brake servo valve and unmanned aerial vehicle |
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