CN107891855B - Double-switch brake pressure control valve driven by wet deflection torque motor - Google Patents
Double-switch brake pressure control valve driven by wet deflection torque motor Download PDFInfo
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- CN107891855B CN107891855B CN201711031083.0A CN201711031083A CN107891855B CN 107891855 B CN107891855 B CN 107891855B CN 201711031083 A CN201711031083 A CN 201711031083A CN 107891855 B CN107891855 B CN 107891855B
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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
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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
- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The invention provides a double-switch brake pressure control valve driven by a wet-type deflection torque motor, which comprises: the wet-type deflection torque motor comprises a swing rod, and is configured to open or close the high-pressure oil inlet side switch valve and the pressure relief oil outlet side switch valve when the wet-type deflection torque motor is electrified. The invention also provides a hydraulic brake system.
Description
Technical Field
The invention relates to the technical field of electromechanical liquid integrated design, in particular to a double-switch brake pressure control valve driven by a wet-type deflection torque motor.
Background
In conventional hydraulic aircraft brake systems, a pressure servo valve or a proportional valve is generally selected as the main control element of the brake pressure. The pressure servo valve can output pressure proportional to the control signal, has high frequency response and is suitable for direct pressure control. The common pressure servo valve is of a two-stage structure, wherein a pilot stage is a nozzle-baffle or a jet pipe controlled by a torque motor, a second stage is a slide valve, and output load pressure is fed back to a spool of the slide valve through an internal oil passage to form a pressure closed loop of oil. Such a structure, although achieving pressure control, inevitably entails problems such as poor anti-contamination capability, poor reliability, severe leakage, and high price.
In the 70 to 80 s of the 20 th century, with the gradual combination of computer control technology and hydraulic technology, hydraulic servo control became mature in the development and application of digital control and digital hydraulic elements. The high-speed switch digital valve is the most widely applied hydraulic element in the digital hydraulic control technology at present. Compared with the traditional valve-controlled hydraulic servo system, the high-speed switch valve has short switching time and high reversing frequency, and can directly realize digital quantity control, thereby omitting a D/A converter in servo valve control or proportional valve control and leading the system to have better control performance. Therefore, the research on the application of the high-speed switch valve in a digital hydraulic servo control system has practical significance for the development of hydraulic servo control technology and modern industry.
Disclosure of Invention
The basic idea of adopting double switch valves to control pressure is to utilize a series structure of two switch valves, and adjust the pressure of a brake control oil port by alternately controlling the opening and closing of the two valves, when the pressure is higher than an instruction, a switch valve at the side of a pressure relief oil outlet is opened, and a switch valve at the side of a high-pressure oil inlet is closed, so that the pressure is reduced; when the pressure is lower than the instruction, the high-pressure oil inlet side switch valve is opened, and the pressure relief oil outlet side switch valve is closed, so that the pressure is increased. Based on the principle, the invention provides a novel dual-switch brake pressure control valve driven by a wet-type deflection torque motor, the functions of two switch valves are integrated in one device, and the two switch valves are cooperatively controlled by adopting the deflection torque motor. The deflection torque motor comprises two groups of electromagnetic windings and two magnetic yokes, the switch valve is placed in an opposite-top mode, when the two groups of electromagnetic windings are energized with currents in the same direction, torque in the same direction can be generated to drive the swing rod to move, and the swing rod is connected with the push rod of the switch valve, so that the switch valve on one side is opened and the switch valve on the other side is closed. Because a set of driving device is shared, the size is reduced, and the device is more suitable for an aircraft brake actuating system with high requirement on structural size. The invention can sense the pressure of the brake cavity through the pressure sensor, and realize the continuous control of the pressure by adjusting the switching duty ratio of the two channel switching valves in the period, thereby meeting the requirement of the brake pressure.
According to an aspect of the present invention, there is provided a wet-type yawing torque motor-driven dual-switch brake pressure control valve, including: the wet-type deflection torque motor comprises a swing rod, and is configured to open or close the high-pressure oil inlet side switch valve and the pressure relief oil outlet side switch valve when the wet-type deflection torque motor is electrified.
According to an embodiment, the wet yaw torque motor further comprises:
the two groups of electromagnetic windings are symmetrically arranged and used for magnetizing the motor iron core when the two groups of electromagnetic windings are electrified;
a motor core for forming two poles having different polarities at both ends thereof when magnetized; and
and an upper yoke and a lower yoke for forming a magnetic force with both ends of the motor core forming two poles having different polarities to deflect the motor core.
Preferably, the upper yoke is an N-pole and the lower yoke is an S-pole.
According to an embodiment, the motor core is connected with the rocker lever such that the rocker lever is actuated to open or close the high pressure inlet side switching valve or the pressure relief outlet side switching valve when the motor core is deflected by a force.
According to an embodiment, the wet yaw torque motor further comprises:
deflection/reset means for assisting the upper yoke and the lower yoke to deflect the motor core when the two sets of electromagnetic windings are energized; and keeping the motor core from deflecting when the two groups of electromagnetic windings are not electrified.
According to an embodiment, said deflecting/return means comprise a spring or a leaf spring.
According to an embodiment, the swing link is provided with a high-pressure-inlet-side switching valve push rod for opening the high-pressure-inlet-side switching valve when the wet-type yawing torque motor is energized in the forward direction and closing the high-pressure-inlet-side switching valve when the wet-type yawing torque motor is energized in the reverse direction; and the swing rod is also provided with a pressure relief oil outlet side switch valve push rod which is used for closing the pressure relief oil outlet side switch valve when the wet-type deflection torque motor is electrified in the positive direction and opening the pressure relief oil outlet side switch valve when the wet-type deflection torque motor is electrified in the reverse direction.
According to an embodiment, the high pressure oil inlet side switching valve includes:
the high-pressure oil inlet side switch valve ball is used for being pushed by the high-pressure oil inlet side switch valve push rod when the wet-type deflection torque motor is powered on in the forward direction so as to enable hydraulic oil to flow through a boosting oil way which is formed by the high-pressure oil inlet, the high-pressure oil inlet side switch valve port and the brake control oil port in sequence; and
and one end of the high-pressure oil inlet side switch valve reset spring is provided with a spring top plate and used for abutting against the high-pressure oil inlet side switch valve ball, and the other end of the high-pressure oil inlet side switch valve reset spring is provided with a spring pressing plate and used for fixing the high-pressure oil inlet side switch valve reset spring.
According to an embodiment, the pressure-relief outlet side switching valve includes:
the pressure relief oil outlet side switch valve ball is used for being pushed by the pressure relief oil outlet side switch valve push rod when the wet-type deflection torque motor is reversely electrified so as to enable hydraulic oil to flow through a pressure relief oil way which is formed by a brake control oil port, a pressure relief oil outlet side switch valve port and a pressure relief oil outlet in sequence; and
and one end of the pressure relief oil outlet side switch valve reset spring is provided with a spring top plate and used for abutting against the pressure relief oil outlet side switch valve ball, and the other end of the pressure relief oil outlet side switch valve reset spring is provided with a spring pressing plate and used for fixing the pressure relief oil outlet side switch valve reset spring.
According to another aspect of the present invention, there is provided a hydraulic brake system including:
the dual-switch brake pressure control valve driven by the wet-type deflection torque motor according to any one of the above embodiments is connected with a brake actuator through a brake control oil port, and is used for providing brake pressure for the brake actuator;
the pump source is connected with the high-pressure oil inlet and used for providing hydraulic oil;
the oil tank is connected with the pressure relief oil outlet and is used for receiving the hydraulic oil flowing out of the pressure relief oil outlet;
the pressure sensor is used for acquiring the brake pressure of the brake control oil port and providing the brake pressure to the control computer; and
the control computer receives the current brake pressure of the brake control oil port from the pressure sensor and generates an instruction signal, so that when the brake pressure is lower than the instruction pressure, the control computer outputs a control signal to open the high-pressure oil inlet side switch valve and close the pressure relief oil outlet side switch valve, hydraulic oil enters the brake actuator through the brake control oil port, and the pressure rises and meets the instruction requirement; when the brake pressure is higher than the instruction pressure, the control computer outputs a control signal to open the pressure relief oil outlet side switch valve and close the high-pressure oil inlet side switch valve, so that hydraulic oil flows into the oil tank from the brake control oil port, the brake pressure is reduced, and the instruction requirement is met.
Drawings
FIG. 1 illustrates a schematic diagram of a wet-type yawing torque motor-driven dual-switch brake pressure control valve according to an embodiment of the invention;
fig. 2(a) and 2(b) show a pressure-increasing oil passage and a pressure-decreasing oil passage of a wet-type yawing torque motor-driven dual-switch brake pressure control valve according to an embodiment of the present invention, respectively;
FIG. 3 is a schematic configuration diagram illustrating a boosting mode of the hydraulic brake system according to the embodiment of the present invention; and
fig. 4 is a schematic configuration diagram illustrating a pressure reducing mode of the hydraulic brake system according to the embodiment of the present invention.
Detailed Description
Hereinafter, a wet-type yawing torque motor-driven dual-switch brake pressure control valve and a hydraulic brake system according to the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 shows a schematic diagram of a wet-type yawing torque motor-driven dual-switch brake pressure control valve according to an embodiment of the invention. As shown in fig. 1, the wet-type yawing torque motor-driven two-switch brake pressure control valve of the present invention comprises: the wet-type deflection torque motor comprises a wet-type deflection torque motor A, a high-pressure oil inlet side switch valve B and a pressure relief oil outlet side switch valve C, wherein the wet-type deflection torque motor A comprises a swing rod 1 which is configured to open or close the high-pressure oil inlet side switch valve B and the pressure relief oil outlet side switch valve C when the wet-type deflection torque motor A is electrified.
Further, as shown in fig. 1, in an embodiment, the wet yaw torque motor a further includes:
two sets of electromagnetic windings 18, 22 arranged symmetrically for magnetizing the motor core 21 when the two sets of electromagnetic windings are energized;
a motor core 21 for forming two poles having different polarities at both ends thereof when magnetized; and
and upper and lower yokes 19 and 17 for forming a magnetic force with both ends of a motor core 21 forming two poles having different polarities to deflect the motor core 21.
Further, as shown in fig. 1, in the embodiment, the motor core 21 is connected to the swing link 1, so that the swing link 1 is actuated to open or close the high pressure inlet side switching valve B or the pressure relief outlet side switching valve C when the motor core 21 is forcibly deflected.
Further, as shown in fig. 1, in an embodiment, the wet yaw torque motor a further includes:
a deflection/return means 20 for assisting the upper yoke 19 and the lower yoke 17 to deflect the motor core 21 when the two sets of electromagnetic windings 18, 22 are energized; and to keep the motor core 21 from deflecting when the two sets of electromagnetic windings 18, 22 are not energized.
Preferably, the deflecting/returning means 22 comprise a spring or leaf spring.
Further, as shown in fig. 1, in the embodiment, the swing link 1 is provided with a high-pressure-inlet-side switching valve push rod 8 for opening the high-pressure-inlet-side switching valve B when the wet-type yawing torque motor a is energized in the forward direction and closing the high-pressure-inlet-side switching valve B when the wet-type yawing torque motor a is energized in the reverse direction; and the swing link 1 is further provided with a pressure-relief oil outlet side switching valve push rod 10 for closing the pressure-relief oil outlet side switching valve C when the wet type yawing torque motor a is energized in the forward direction and opening the pressure-relief oil outlet side switching valve C when the wet type yawing torque motor a is energized in the reverse direction.
Further, as shown in fig. 1, the wet-type yawing torque motor-driven dual-switch brake pressure control valve of the present invention further includes:
a motor seal housing 23 for sealing the wet yaw torque motor a. The invention adopts an integral sealing mode, no strict sealing measures are taken between the wet-type deflection torque motor A and the switch valves B and C, so that the internal pressure is balanced, the integral reliability of the device is facilitated, and when the device works, the cavity D between the wet-type deflection torque motor A and the motor sealing shell 23 is filled with oil. In other words, the yaw moment motor is referred to as a wet yaw moment motor since it operates in oil.
The structures of the high pressure inlet side switching valve B and the pressure release outlet side switching valve C according to the embodiment of the invention are further described below with reference to fig. 2. Fig. 2 illustrates a pressure-increasing oil passage and a pressure-decreasing oil passage of a wet-type yawing torque motor-driven two-switch brake pressure control valve according to an embodiment of the present invention.
As shown in fig. 1 and 2, the high pressure oil inlet side switching valve B includes:
the high-pressure oil inlet side switch valve ball 6 is used for being pushed by a high-pressure oil inlet side switch valve push rod 8 when the wet-type deflection torque motor A is powered on in the forward direction so that hydraulic oil flows through a boosting oil path E which is formed by the high-pressure oil inlet 4, the high-pressure oil inlet side switch valve port 7 and the brake control oil port 9 in sequence to realize the rising of brake pressure; and
the high-pressure oil inlet side switch valve reset spring 3 is provided with a spring top plate 5 at one end for abutting against the high-pressure oil inlet side switch valve ball 6 and a spring pressing plate 2 at the other end for fixing the high-pressure oil inlet side switch valve reset spring 3.
As shown in fig. 1 and 2, the relief outlet side switching valve C includes:
a pressure relief outlet side switch valve ball 12, which is pushed by a pressure relief outlet side switch valve push rod 10 when the wet-type deflection torque motor a is reversely energized, so that hydraulic oil flows through a pressure relief oil path F formed by a brake control oil port 9, a pressure relief outlet side switch valve port 11 and a pressure relief outlet 14 in sequence, thereby reducing the brake pressure; and
and a pressure relief outlet side switch valve return spring 15, one end of which is provided with a spring top plate 13 for abutting against the pressure relief outlet side switch valve ball 12 and the other end of which is provided with a spring pressing plate 16 for fixing the pressure relief outlet side switch valve return spring 15.
Fig. 3 and 4 are schematic structural views illustrating a pressure-up mode and a pressure-down mode of the hydraulic brake system according to the embodiment of the present invention, respectively. As shown in fig. 3 and 4, the hydraulic brake system of the present invention includes:
the dual-switch brake pressure control valve G driven by the wet-type deflection torque motor according to any one of the above embodiments is connected with the brake actuator 26 through the brake control oil port 9, and is used for providing brake pressure to the brake actuator 26;
the pump source 24 is connected with the high-pressure oil inlet 4 and used for providing hydraulic oil;
the oil tank 25 is connected with the pressure relief oil outlet 14 and is used for receiving hydraulic oil flowing out of the pressure relief oil outlet 14;
a pressure sensor 27 for collecting the brake pressure of the brake control port 9 and providing it to the control computer 28; and
a control computer 28 receiving the current braking pressure from the brake control oil port 9 of the pressure sensor 27 and generating a command signal so that when the braking pressure is lower than the command pressure, the control computer 28 outputs a control signal to open the high pressure oil inlet side switching valve B and close the pressure relief oil outlet side switching valve C so that hydraulic oil enters the brake actuator 26 through the brake control oil port 9, and the pressure rises and meets the command requirement; when the braking pressure is higher than the command pressure, the control computer 28 outputs a control signal to open the relief oil outlet side switching valve C and close the high pressure oil inlet side switching valve B, so that the hydraulic oil flows into the oil tank 25 from the braking control oil port 9, the braking pressure decreases, and the command requirement is met. Therefore, the brake pressure is always kept within a certain range required by the command through the continuous adjustment of the control system.
Preferably, the control signal is a PWM (pulse width modulation) signal.
In summary, the present invention provides a wet-type yawing torque motor driven dual-switch brake pressure control valve, which includes a yawing torque motor and two oppositely disposed on-off valves. The deflection torque motor comprises elements such as an electromagnetic winding, a magnetic yoke, an iron core and a swing rod, a constant magnetic field can be generated in the magnetic yoke under the action of the electromagnetic winding, when two groups of electromagnetic windings of the torque motor are supplied with power simultaneously, magnetic fields in the same direction can be generated in the coils, the iron core is magnetized, the iron core drives the swing rod to swing under the action of the magnetic field of the magnetic yoke, and the swing rod is connected with a push rod of the switch valve, so that the switch valve on one side is opened, the switch valve on the other side is closed, and the size of the whole valve is reduced. The control valve comprises three oil ports, namely a high-pressure oil inlet, a pressure relief oil outlet and a brake control oil port. The pressure of the brake control oil port is adjusted by alternately controlling the opening and closing of the two switch valves, when the brake pressure is higher than an instruction, the switch valve on the side of the pressure relief oil outlet is opened, and the switch valve on the side of the high-pressure oil inlet is closed, so that the pressure is reduced; when the brake pressure is lower than the command, the high-pressure oil inlet side switch valve is opened, and the pressure relief oil outlet side switch valve is closed, so that the pressure is increased. Continuous control of pressure is achieved by adjusting the duty cycle of the switch within a fixed period.
In addition, when the deflection torque motor is electrified reversely, the swing rod moves reversely. Compared with the traditional switch valve, the valve closing process is that the valve ball tends to close under the action of the spring, but the valve ball is still connected with the valve needle at the moment, so the valve core needs to be pushed to move together, and the valve core is soaked in oil, so the valve core has larger damping effect and longer closing time. In other words, the two side switch valves are arranged in a butting mode and share the same swing rod, so that the elastic force of the return spring is contained and the swing rod moves actively in the closing process, and the closing time of the valves is shortened.
In addition, the pre-tightening force of the return spring of the pressure relief oil outlet side switch valve can limit the maximum brake control pressure, the function of a safety valve is achieved, and the safety of a brake system is improved. In order to reduce the pressure on internal elements, no strict sealing measure is provided between a hydraulic system and an electrical system, good communication is guaranteed, pressure balance of internal components is realized, and meanwhile, a motor sealing shell is adopted to strictly seal an electrical part from the outside, so that safety and functions are guaranteed.
In addition, the double-switch brake pressure control valve driven by the wet-type deflection torque motor has the following advantages: the brake pressure control valve adopts a high-speed switch valve as a basic unit, and has the advantages of high switching frequency, low cost, high pollution resistance, small leakage and the like; and the control is carried out by adopting a digital switch, and a control signal is directly given by a digital computer, so that the anti-interference capability is strong, and the electrical connection is convenient.
It should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious variations or modifications which fall within the spirit of the invention are intended to be covered by the scope of the present invention.
Claims (7)
1. A wet-type yaw-torque motor driven dual switch brake pressure control valve comprising: the wet-type deflection torque motor comprises a swing rod, a high-pressure oil inlet side switch valve and a pressure relief oil outlet side switch valve, and is characterized in that the wet-type deflection torque motor comprises a swing rod which is configured to open or close the high-pressure oil inlet side switch valve and the pressure relief oil outlet side switch valve when the wet-type deflection torque motor is electrified;
the swing rod is provided with a high-pressure oil inlet side switch valve push rod which is used for opening the high-pressure oil inlet side switch valve when the wet type deflection torque motor is electrified in the forward direction and closing the high-pressure oil inlet side switch valve when the wet type deflection torque motor is electrified in the reverse direction; the swing rod is also provided with a pressure relief oil outlet side switch valve push rod which is used for closing the pressure relief oil outlet side switch valve when the wet-type deflection torque motor is electrified in the forward direction and opening the pressure relief oil outlet side switch valve when the wet-type deflection torque motor is electrified in the reverse direction;
the high pressure oil inlet side switching valve includes:
the high-pressure oil inlet side switch valve ball is used for being pushed by the high-pressure oil inlet side switch valve push rod when the wet-type deflection torque motor is powered on in the forward direction so as to enable hydraulic oil to flow through a boosting oil way which is formed by the high-pressure oil inlet, the high-pressure oil inlet side switch valve port and the brake control oil port in sequence; and
the high-pressure oil inlet side switch valve return spring is provided with a spring top plate at one end and used for abutting against the high-pressure oil inlet side switch valve ball, and a spring pressing plate at the other end and used for fixing the high-pressure oil inlet side switch valve return spring;
the pressure relief oil outlet side switch valve includes:
the pressure relief oil outlet side switch valve ball is used for being pushed by the pressure relief oil outlet side switch valve push rod when the wet-type deflection torque motor is reversely electrified so as to enable hydraulic oil to flow through a pressure relief oil way which is formed by a brake control oil port, a pressure relief oil outlet side switch valve port and a pressure relief oil outlet in sequence; and
and one end of the pressure relief oil outlet side switch valve reset spring is provided with a spring top plate and used for abutting against the pressure relief oil outlet side switch valve ball, and the other end of the pressure relief oil outlet side switch valve reset spring is provided with a spring pressing plate and used for fixing the pressure relief oil outlet side switch valve reset spring.
2. The wet yaw torque motor driven dual switch brake pressure control valve of claim 1, wherein the wet yaw torque motor further comprises:
the two groups of electromagnetic windings are symmetrically arranged and used for magnetizing the motor iron core when the two groups of electromagnetic windings are electrified;
a motor core for forming two poles having different polarities at both ends thereof when magnetized; and
and an upper yoke and a lower yoke for forming a magnetic force with both ends of the motor core forming two poles having different polarities to deflect the motor core.
3. The wet-type yawing moment motor-driven dual-switch brake pressure control valve of claim 2, wherein the motor core is connected with the swing link such that the swing link is actuated to open or close the high pressure oil inlet side switching valve or the pressure relief oil outlet side switching valve when the motor core is deflected by a force.
4. The wet yaw torque motor driven dual switch brake pressure control valve of claim 2, wherein the wet yaw torque motor further comprises:
deflection/reset means for assisting the upper yoke and the lower yoke to deflect the motor core when the two sets of electromagnetic windings are energized; and keeping the motor core from deflecting when the two groups of electromagnetic windings are not electrified.
5. The wet yaw torque motor driven dual switch brake pressure control valve of claim 4, wherein the yaw/return means comprises a spring or leaf spring.
6. The wet yaw torque motor driven dual switch brake pressure control valve of claim 1, further comprising:
a motor seal housing for sealing the wet yaw torque motor.
7. A hydraulic brake system comprising:
the wet yaw moment motor driven dual switch brake pressure control valve of any of claims 1 to 6, connected to a brake actuator via a brake control port for providing brake pressure to the brake actuator;
the pump source is connected with the high-pressure oil inlet and used for providing hydraulic oil;
the oil tank is connected with the pressure relief oil outlet and is used for receiving the hydraulic oil flowing out of the pressure relief oil outlet;
the pressure sensor is used for acquiring the brake pressure of the brake control oil port and providing the brake pressure to the control computer; and
the control computer receives the current brake pressure of the brake control oil port from the pressure sensor and generates an instruction signal, so that when the brake pressure is lower than the instruction pressure, the control computer outputs a control signal to open the high-pressure oil inlet side switch valve and close the pressure relief oil outlet side switch valve, hydraulic oil enters the brake actuator through the brake control oil port, and the pressure rises and meets the instruction requirement; when the brake pressure is higher than the instruction pressure, the control computer outputs a control signal to open the pressure relief oil outlet side switch valve and close the high-pressure oil inlet side switch valve, so that hydraulic oil flows into the oil tank from the brake control oil port, the brake pressure is reduced, and the instruction requirement is met.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711031083.0A CN107891855B (en) | 2017-10-27 | 2017-10-27 | Double-switch brake pressure control valve driven by wet deflection torque motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711031083.0A CN107891855B (en) | 2017-10-27 | 2017-10-27 | Double-switch brake pressure control valve driven by wet deflection torque motor |
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| CN107891855A CN107891855A (en) | 2018-04-10 |
| CN107891855B true CN107891855B (en) | 2020-02-28 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5929189Y2 (en) * | 1979-10-11 | 1984-08-22 | 東邦ガス工業株式会社 | solenoid valve |
| CN103124114B (en) * | 2013-02-22 | 2015-04-22 | 浙江工业大学 | Wet-type high pressure resistant torque motor |
| CN103144624B (en) * | 2013-03-11 | 2015-05-13 | 西安航空制动科技有限公司 | Brake control valve of airplane |
| CN104454729A (en) * | 2014-11-28 | 2015-03-25 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Electro-hydraulic servo valve |
| CN105366040B (en) * | 2015-11-18 | 2017-06-16 | 北京航空航天大学 | Based on biswitch valve from energy brake gear and system |
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