CN109630489B - Electrohydraulic pressure servo valve - Google Patents
Electrohydraulic pressure servo valve Download PDFInfo
- Publication number
- CN109630489B CN109630489B CN201811311645.1A CN201811311645A CN109630489B CN 109630489 B CN109630489 B CN 109630489B CN 201811311645 A CN201811311645 A CN 201811311645A CN 109630489 B CN109630489 B CN 109630489B
- Authority
- CN
- China
- Prior art keywords
- valve
- oil
- communicated
- oil inlet
- way
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003921 oil Substances 0.000 description 137
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
Abstract
The electrohydraulic servo valve comprises a slide lock valve, an electromagnetic return valve, two torque motors and two slide valves, wherein two ends of a nozzle of each torque motor are respectively communicated with two ends of a control cavity of one slide valve through an outlet of an orifice assembly; the brake ports of the two slide valves are respectively connected with the left brake cavity interface and the right brake cavity interface through independent oil ways; the oil inlet of the sliding lock valve is communicated with the oil inlet of each sliding valve through an oil way, the control cavity of the sliding lock valve is communicated with the oil way of the oil return opening of each sliding valve through an oil way, and the two oil outlets of the control cavity of the sliding lock valve are communicated with the oil return interface; one oil inlet of the sliding lock valve is communicated with the oil inlet of the electromagnetic oil return valve, and the other oil inlet is communicated with the control cavity of the electromagnetic oil return valve; an oil return port of the electromagnetic oil return valve is communicated with the oil return port; the oil inlet port is communicated with the oil inlet of each slide valve, one oil inlet of the slide lock valve and the oil inlet of the electromagnetic oil return valve through oil ways. The invention is safe and reliable, is convenient for assembly test and assembly, and can realize safer and more reliable braking.
Description
Technical Field
The invention belongs to an electrohydraulic servo valve, in particular to an electrohydraulic pressure servo valve which is applied to an anti-skid brake system, ensures reliable braking of a wheel and prevents slipping and locking of the wheel.
Background
In an airplane wheel braking system, an electronic anti-skid braking system generally adopts an electrohydraulic pressure servo valve as an anti-skid control accessory, so that the braking pressure of the airplane wheel is accurately controlled, the tire is prevented from being burst, and the braking distance is shortened. The electrohydraulic pressure servo valve mainly comprises a torque motor electric part, a spray stop valve and a slide valve hydraulic element part. Typically, electrohydraulic servo valves employ a dual nozzle flapper valve and dual spool valve configuration. In addition, the existing electrohydraulic pressure servo valve is also provided with a one-way valve, a safety valve, an oil return electromagnetic valve and other safety devices and auxiliary devices. The check valve is arranged between the oil supply cavity and the brake cavity and is used for releasing or releasing the brake when the valve core is clamped and cannot be released. The safety valve is used for ensuring that the pressure of hydraulic oil in the inner cavity of the electrohydraulic pressure servo valve is within the safety allowable limit. The oil return electromagnetic valve is used for opening or closing an oil return passage of the oil return cavity according to the requirement.
The electrohydraulic pressure servo valve is a precise accessory, however, the prior art mainly adopts a mechanical valve and is split, thus being unfavorable for assembly test and assembly, and meanwhile, the reliability of the existing torque motor needs to be improved.
Disclosure of Invention
The invention provides a safe and reliable electrohydraulic pressure servo valve for braking, which aims at improving the redundancy, the safety and the reliability and the assembly property of the existing pressure servo valve.
In order to achieve the above purpose, the electrohydraulic pressure servo valve designed by the invention is characterized in that: the device comprises a slide lock valve, an electromagnetic oil return valve, two torque motors and two slide valves, wherein two ends of a nozzle of each torque motor are respectively communicated with two ends of a control cavity of one slide valve through an outlet of an orifice assembly; the brake ports of the two slide valves are respectively connected with the left brake cavity interface and the right brake cavity interface through independent oil ways; the oil inlet of the sliding lock valve is communicated with the oil inlet of each sliding valve through an oil way, the control cavity of the sliding lock valve is communicated with the oil way of the oil return opening of each sliding valve through an oil way, and the two oil outlets of the control cavity of the sliding lock valve are communicated with the oil return interface; one oil inlet of the sliding lock valve is communicated with the oil inlet of the electromagnetic oil return valve, and the other oil inlet is communicated with the control cavity of the electromagnetic oil return valve; an oil return port of the electromagnetic oil return valve is communicated with the oil return port; the oil inlet port is communicated with the oil inlet of each slide valve, one oil inlet of the slide lock valve and the oil inlet of the electromagnetic oil return valve through oil ways.
Preferably, the oil way of the slide valve oil return port is divided into two branches, wherein one oil way is communicated with the oil inlet of the slide lock valve control cavity, and the other oil way is communicated with the oil inlet of the oil return safety valve.
Preferably, a one-way valve is arranged between the oil inlet oil way of the electrohydraulic pressure servo valve and the interface oil way of the left and right brake cavities and forms a bypass channel; the opening direction of the one-way valve is opposite to the oil inlet direction of the brake system; the oil outlet of the one-way valve is communicated with the oil way of the oil inlet of the slide valve through the oil way; the oil inlet of the one-way valve is communicated with the oil way between the left and right brake cavity interfaces and one slide valve brake port through the oil way.
Preferably, the torque motor is provided with double coils. Thus, the redundancy is increased and the reliability is improved.
The beneficial effects of the invention are as follows: 1. the pressure servo valve increases coil redundancy, ensuring that when one coil is problematic, the other coil still works reliably. 2. The mechanical valve is changed into a hydraulic control valve, so that the valve is safer and more reliable. 3. The valve is split into an integral plug-in type, so that assembly test and assembly are facilitated. 4. The safety and the reliability, the assembly and the like are improved, so that the brake is safer and more reliable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, 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 invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Figure 1 is a schematic diagram of the structure of the electrohydraulic servo valve of the present invention,
FIG. 2 is a schematic diagram of the operation of the electromagnetic return valve and the slide lock valve of the present invention.
In the figure: torque motor 1, nozzle 1.1, orifice subassembly 1.2, casing 2, slide valve 3, left brake chamber interface 4, right brake chamber interface 5, advance oil interface 6, main oil filter 7, slide lock valve 8, electromagnetism oil return valve 9, oil return safety valve 10, oil return interface 11, check valve 12.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
As shown in fig. 1, the present embodiment is an electrohydraulic servo valve, which is obtained by improving and integrating the prior art.
The two torque motors 1 are provided with double coils, which increases redundancy and reliability, which are fixed to both sides of the housing 2, respectively. The two ends of the nozzle 1.1 in the torque motor are respectively communicated with the upper outlets of the orifice assemblies 1.2 positioned at the two ends of the oil filter of the torque motor through oil ways. The lower outlet of the orifice assembly 1.2 is respectively communicated with two ends of a control cavity of the slide valve 3 through oil ways. The left brake cavity interface 4 is communicated with the brake port of one slide valve 3 through an oil way, and the right brake cavity interface 5 is communicated with the brake port of the other slide valve 3 through an oil way. The two paths of brakes are respectively provided with a torque motor, a one-way valve and a slide valve, and share one slide lock valve, an electromagnetic oil return valve and an oil return safety valve.
An outlet of an oil inlet interface 6 of the electrohydraulic pressure servo valve is connected with a main oil filter 7, an oil way of an oil outlet of the main oil filter 7 is divided into two branches, one branch of the oil way is communicated with oil inlets of a sliding lock valve 8 and an electromagnetic oil return valve 9, and the other branch of the oil way is communicated with an oil inlet of a sliding valve 3.
The two ends of the control cavity of the slide valve 3 are communicated with the orifice component 1.2, the brake ports of the two slide valves 3 are respectively connected with the left brake cavity interface 4 and the right brake cavity interface 5 through independent oil ways, and the oil return port of the slide valve 3 is communicated with the oil inlet of the control cavity of the slide lock valve 8 and the oil inlet of the oil return safety valve 10.
The oil inlet of the sliding lock valve 8 is communicated with the oil inlet of each sliding valve 3 and the oil inlet port 6 through an oil way, the control cavity of the sliding lock valve 8 is communicated with the oil way of the oil return port of each sliding valve 3 through an oil way, and the two oil outlets of the control cavity of the sliding lock valve 8 are communicated with the oil return port 11; one oil inlet of the sliding lock valve 8 is communicated with the oil inlet of the electromagnetic oil return valve 9, and the other oil inlet is communicated with the control cavity of the electromagnetic oil return valve 9.
The oil return port of the electromagnetic oil return valve 9 is communicated with the oil return port 11, the oil inlet is communicated with the oil inlet port 6, and the control cavity is communicated with an oil inlet of the sliding lock valve.
The oil inlet port 6 is communicated with the oil inlet of each slide valve 3, one oil inlet of the slide lock valve 8 and the oil inlet of the electromagnetic oil return valve 9 through oil ways.
The oil return port 11 is communicated with an oil return port of the control cavity of the slide lock valve 8 and an oil return port of the electromagnetic oil return valve 9 through an oil way.
A one-way valve 12 is arranged between the oil way of the oil inlet interface 6 of the electrohydraulic servo valve and the oil way of the left brake cavity interface 4 and between the oil way of the oil inlet interface 6 of the electrohydraulic servo valve and the oil way of the right brake cavity interface 5 to form a bypass channel; the opening direction of the one-way valve 12 is opposite to the oil inlet direction of the brake system; the oil outlet of the one-way valve 12 is communicated with the oil way of the oil inlet of the slide valve 3 through an oil way; the oil inlet of the check valve 12 is communicated with the oil path between the left and right brake cavity interfaces and the brake port of one slide valve 3 through the oil path.
When the input current signal is zero, the torque motor baffle is in the middle position, the pressures of the two nozzle cavities are equal, the brake cavity is communicated with the oil way at the right end of the spool valve through the small hole on the spool valve, so that the pressures of the left cavity and the right cavity of the spool valve are also equal, and the spool valve is at the right end under the action of spring force. The oil supply cavity of the slide valve pair is communicated with the brake cavity, and the pressure of the brake cavity is equal to the oil supply pressure. When a current signal is input to the valve, the baffle deflects rightward, the pressure of the nozzle cavity acting on the right end of the spool valve is increased, the pressure of the nozzle cavity on the left end is reduced, and the spool valve moves leftward. The oil inlet side of the spool valve begins to gradually decrease, the hydraulic source outputs a certain load pressure to the load through the oil inlet side, the pressure is fed back to the feedback end surface of the spool valve, and the spool valve stops moving until all forces acting on the spool valve, namely the driving force of the nozzle baffle stage, the feedback force of the load pressure and the external interference force caused by the oil return pressure reach the balanced state. When the input signal increases, the output load pressure of the valve decreases with it, and the output load pressure is inversely proportional to the input current signal.
As shown in fig. 2, the working principle of the electromagnetic oil return valve is as follows:
1. when the electromagnet is powered off, no electromagnetic force is generated, the steel ball is pushed to the right valve seat under the action of the pressure of oil inlet, hydraulic oil passes through the left valve seat to the left end of the piston of the sliding lock valve, and the area of the piston is larger than the area of the valve core end of the sliding lock valve, so that the left Bian Li is larger than the right force under the action of the pressure of oil inlet, the valve core of the sliding lock valve moves rightwards, and an oil return path of the servo valve is closed. Thus, the valve achieves the purpose of closing the oil return by power failure. The brake pressure is always equal to the oil supply pressure.
2. When the electromagnet is electrified, electromagnetic force is generated, the steel ball rapidly closes the left valve seat under the action of the ejector rod, so that an oil way at the left end of the piston of the sliding lock valve is communicated with oil return through the right valve seat, the pressure is zero, the valve core of the sliding lock valve pushes the valve core of the sliding lock valve to the left end under the action of oil inlet pressure at the right end, an oil return intersection of the servo valve is opened, and therefore the electromagnetic oil return valve achieves the aim of opening oil return by electrifying.
Claims (4)
1. An electrohydraulic servo valve, characterized by: the device comprises a slide lock valve, an electromagnetic oil return valve, two torque motors and two slide valves, wherein two ends of a nozzle of each torque motor are respectively communicated with two ends of a control cavity of one slide valve through an outlet of an orifice assembly; the brake ports of the two slide valves are respectively connected with the left brake cavity interface and the right brake cavity interface through independent oil ways; the oil inlet of the sliding lock valve is communicated with the oil inlet of each sliding valve through an oil way, the control cavity of the sliding lock valve is communicated with the oil way of the oil return opening of each sliding valve through an oil way, and the two oil outlets of the control cavity of the sliding lock valve are communicated with the oil return interface; one oil inlet of the sliding lock valve is communicated with the oil inlet of the electromagnetic oil return valve, and the other oil inlet is communicated with the control cavity of the electromagnetic oil return valve; an oil return port of the electromagnetic oil return valve is communicated with the oil return port; the oil inlet port is communicated with the oil inlet of each slide valve, one oil inlet of the slide lock valve and the oil inlet of the electromagnetic oil return valve through oil ways.
2. The electrohydraulic pressure servo valve of claim 1 wherein: the oil way of the slide valve oil return port is divided into two branches, one of which is communicated with the oil inlet of the slide lock valve control cavity, and the other of which is communicated with the oil inlet of the oil return safety valve.
3. The electrohydraulic pressure servo valve of claim 1 wherein: a one-way valve is arranged between an oil inlet oil way of the electrohydraulic pressure servo valve and an interface oil way of the left brake cavity and the right brake cavity, and a bypass channel is formed; the opening direction of the one-way valve is opposite to the oil inlet direction of the brake system; the oil outlet of the one-way valve is communicated with the oil way of the oil inlet of the slide valve through the oil way; the oil inlet of the one-way valve is communicated with the oil way between the left and right brake cavity interfaces and one slide valve brake port through the oil way.
4. The electrohydraulic pressure servo valve of claim 1 wherein: the torque motor is provided with double coils.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811311645.1A CN109630489B (en) | 2018-11-06 | 2018-11-06 | Electrohydraulic pressure servo valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811311645.1A CN109630489B (en) | 2018-11-06 | 2018-11-06 | Electrohydraulic pressure servo valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109630489A CN109630489A (en) | 2019-04-16 |
| CN109630489B true CN109630489B (en) | 2024-02-27 |
Family
ID=66067271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811311645.1A Active CN109630489B (en) | 2018-11-06 | 2018-11-06 | Electrohydraulic pressure servo valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109630489B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206773A (en) * | 2019-06-24 | 2019-09-06 | 上海衡拓液压控制技术有限公司 | With the hydraulic lock of quick pressure releasing function in brake system |
| CN113719490A (en) * | 2021-08-31 | 2021-11-30 | 上海衡拓液压控制技术有限公司 | Brake control servo valve with rapid pressure relief protection |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3357444A (en) * | 1965-01-21 | 1967-12-12 | Weston Instruments Inc | Fluid flow control |
| US3782404A (en) * | 1972-06-14 | 1974-01-01 | Commercial Shearing | Adjustable, metered, directional flow control arrangements |
| CN103144766A (en) * | 2013-03-11 | 2013-06-12 | 西安航空制动科技有限公司 | Electric hydraulic pressure servo valve |
| DE102012209218A1 (en) * | 2012-05-31 | 2013-12-05 | Robert Bosch Gmbh | Hydraulic block for a hydraulic unit of a slip-controlled, hydraulic vehicle brake system |
| CN212106416U (en) * | 2018-11-06 | 2020-12-08 | 襄阳航宇机电液压应用技术有限公司 | Electro-hydraulic pressure servo valve |
-
2018
- 2018-11-06 CN CN201811311645.1A patent/CN109630489B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3357444A (en) * | 1965-01-21 | 1967-12-12 | Weston Instruments Inc | Fluid flow control |
| US3782404A (en) * | 1972-06-14 | 1974-01-01 | Commercial Shearing | Adjustable, metered, directional flow control arrangements |
| DE102012209218A1 (en) * | 2012-05-31 | 2013-12-05 | Robert Bosch Gmbh | Hydraulic block for a hydraulic unit of a slip-controlled, hydraulic vehicle brake system |
| CN103144766A (en) * | 2013-03-11 | 2013-06-12 | 西安航空制动科技有限公司 | Electric hydraulic pressure servo valve |
| CN212106416U (en) * | 2018-11-06 | 2020-12-08 | 襄阳航宇机电液压应用技术有限公司 | Electro-hydraulic pressure servo valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109630489A (en) | 2019-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110725995B (en) | Fluid valve | |
| US6206038B1 (en) | Multiway valve | |
| CN109630489B (en) | Electrohydraulic pressure servo valve | |
| CN107883014B (en) | Fluid valve | |
| KR20070102543A (en) | Valve, especially proportional pressure control valve | |
| CN113719490A (en) | Brake control servo valve with rapid pressure relief protection | |
| JPH03175509A (en) | Valve device | |
| CN215890647U (en) | Brake control servo valve with rapid pressure relief protection | |
| CN116080611A (en) | Brake system for a vehicle | |
| CN109760825A (en) | A kind of steerable electrohydraulic servo valve | |
| US3507545A (en) | Dual brake valves | |
| CN212106416U (en) | Electro-hydraulic pressure servo valve | |
| US4007666A (en) | Servoactuator | |
| CN209795818U (en) | Mechanically operable electrohydraulic servo valve | |
| CN109923010B (en) | Valve assembly, brake system and method for operating a valve assembly | |
| CN112849112B (en) | Control valve system, auxiliary brake system and vehicle | |
| US5251969A (en) | Brake power controller with electrically actuated locking apparatus | |
| US20060071547A1 (en) | Valve assembly for anti-skid aircraft brakes | |
| JP3837671B2 (en) | Application to solenoid valve and brake circuit for fluid pressure adjustment | |
| CN209667360U (en) | Can liquid pass manipulation electrohydraulic servo valve | |
| CN109760826B (en) | Electrohydraulic servo valve capable of being operated by liquid transmission | |
| KR20160045642A (en) | Hydraulic unit of electronic control brake system | |
| CN115776962A (en) | Anti-lock brake unit for a hydraulic brake system, in particular for a bicycle | |
| CN213270511U (en) | Pilot valve structure and proportional pressure reducing valve | |
| CN112503042B (en) | Pilot valve structure and proportional pressure reducing valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |