Combined hydraulic valve of high-lift system

Abstract

The utility model provides a combined hydraulic valve of a high-lift system. The combined hydraulic valve is composed of an electric connector unit, a shell assembly unit, a pilot control unit and a main valve unit. Wherein an oil filter assembly is arranged at an oil inlet of the pilot control unit; according to the pilot control unit of the combined hydraulic valve, the oil filter assembly is arranged at the oil inlet, foreign matter can be prevented from entering an inner cavity of the pilot valve, and therefore abnormal opening or closing of the pilot valve is avoided; the guide rod and the guide sleeve of the main valve unit are sealed in a sliding ring combination mode, oil leakage is avoided, therefore, the fit clearance of the main valve unit can be properly increased, after the fit clearance is increased, the situation that normal reversing action cannot be achieved due to valve clamping stagnation caused by oil pollution can be avoided, and the anti-pollution capacity of a product is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of aviation hydraulic design, and in particular relates to a combined hydraulic valve for a high lift system. Background Art

[0002] The on-off of the hydraulic drive oil circuit of the aircraft high-lift system is mostly achieved by switching the position of the valve core of a pilot-operated two-position three-way solenoid valve. When the solenoid valve core becomes stuck, it may cause the high-lift system to operate without command, fail to execute the pilot's control instructions, and affect the completion of the aircraft's mission. Utility Model Content

[0003] In view of the above technical problems, the present application provides a combined hydraulic valve of a high lift system, the combined hydraulic valve comprising an electrical connector unit, a housing assembly unit, a pilot control unit and a main valve unit;

[0004] Among them, an oil filter assembly is arranged at the oil inlet of the pilot control unit, and the oil filter assembly is used to prevent foreign matter from entering the inner cavity of the pilot valve, thereby avoiding abnormal opening or closing of the pilot valve.

[0005] Preferably, a sliding ring combination seal is used between the guide rod and the guide sleeve of the main valve unit.

[0006] Preferably, there is no oil leakage between the guide rod and the guide sleeve, and the fitting clearance is appropriately increased. When the clearance is increased, it is possible to avoid the valve being stuck and unable to switch direction normally due to oil contamination, thereby improving the product's anti-pollution ability.

[0007] Preferably, the combined hydraulic valve further comprises:

[0008] The cut-off valve is used to quickly cut off the pressure oil inlet line of the system.

[0009] Preferably, the pilot control unit further includes a steel ball, an elastic washer, a guide sleeve and an electromagnet unit.

[0010] Preferably, the cut-off valve is composed of a push rod, an iron core, a valve seat, a positioning sleeve assembly, a spring seat and a spring.

[0011] Beneficial technical effects of this application:

[0012] The pilot control unit of the combined hydraulic valve provided in the present application is provided with an oil filter assembly at the oil inlet, which can prevent foreign matter from entering the inner cavity of the pilot valve, thereby avoiding abnormal opening or closing of the pilot valve; a sliding ring combination seal is adopted between the guide rod and the guide sleeve of the main valve unit, and there is no oil leakage, so the fitting clearance can be appropriately increased. After the clearance is increased, it can avoid the valve from getting stuck and failing to switch direction normally due to oil contamination, thereby improving the product's anti-pollution ability; a cut-off valve is designed to realize the function of quickly cutting off the pressure oil inlet circuit of the system. When the wing surface movement exceeds a certain range of the command position, the pressure oil inlet circuit of the system is quickly cut off, so that the wing surface stops at the specified position, ensuring the safe use of the high lift system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the structural diagram of the hydraulic combination valve;

[0014] Figure 2 A cross-sectional view of a hydraulic combination valve;

[0015] Figure 3 Another cross-sectional view of the hydraulic combination valve;

[0016] Figure 4 It is another cross-sectional view of the hydraulic combination valve;

[0017] Figure 5 This is the schematic diagram of the power-off state of the D1, D2, and D3 electromagnets;

[0018] Figure 6 The schematic diagram of the state where the D1 electromagnet is powered on and the D2 and D3 electromagnets are powered off;

[0019] Figure 7 The schematic diagram of the state where the D2 electromagnet is powered on and the D1 and D3 electromagnets are powered off;

[0020] Figure 8 The schematic diagram of the D3 electromagnet being energized, and the D1 and D2 electromagnets being de-energized or energized;

[0021] Among them: 1-outer cover, 2-coil assembly, 3-jacket, 4-armature, 5-first iron core, 6-first push rod, 7-first valve seat, 8-positioning sleeve, 9-steel ball, 10-oil filter assembly, 11-elastic gasket, 12-second valve seat, 13-end cover, 14-first spring, 15-guide sleeve, 16-third valve seat, 17-valve, 18-bushing, 19-push rod, 20-first spring seat, 21-first Second push rod, 22-second iron core, 23-fourth valve seat, 24-guide sleeve, 25-fifth valve seat, 26-positioning sleeve assembly, 27-second spring seat, 28-second spring, 29-sixth valve seat, 30-housing assembly, 31-first nut, 32-first nozzle, 33-second nut, 34-second nozzle, 35-screw plug, 36-adapter seat, 37-socket, 38-plug, 39-tail accessory. DETAILED DESCRIPTION

[0022] See also Figure 1-Figure 8 The present application provides a high-lift system retraction and extension combined hydraulic valve with better anti-pollution ability and the function of cutting off the oil supply line. When the aircraft wing exceeds a certain range of the control command position, the system's pressure supply line can be automatically (or manually) quickly cut off, so that the wing stops at the specified position, ensuring the safe use of the flap system.

[0023] A combined hydraulic solenoid valve for a high-lift system provided in the present application is mainly composed of an electrical connector unit, a housing assembly unit, a pilot control unit, a main valve unit, a cut-off valve unit and the like; an oil filter assembly is arranged at the oil inlet of the pilot control unit to prevent foreign matter from entering the inner cavity of the pilot valve, thereby avoiding abnormal opening or closing of the pilot valve; a sliding ring combination seal is adopted between the guide rod and the guide sleeve of the main valve unit, and there is no oil leakage, so the fitting clearance can be appropriately increased. After the clearance is increased, the valve can be prevented from being stuck and unable to switch normally due to oil contamination, thereby improving the product's anti-pollution ability; a cut-off valve is designed to quickly cut off the pressure oil inlet of the system.

[0024] The combined hydraulic valve is mainly composed of an electrical connector unit, a housing assembly unit, a pilot control unit, a main valve unit, a cut-off valve unit, etc. Figure 1As shown. The electrical connector unit consists of a plug, a socket, and a tail accessory, and its function is to provide an interface for the product's electromagnet coil to connect to the external circuit; the housing component unit consists of an end cover, an adapter, an outer cover, a nozzle, a nut, a nozzle, a nut, a screw plug, etc., and its function is to provide an interface, seal, and installation between the product and the outside; the pilot control unit consists of a valve seat, a positioning sleeve, a steel ball, an oil filter assembly, an elastic gasket, a valve seat, a push rod, a valve seat, a guide sleeve, a valve seat, a positioning sleeve assembly, a spring seat, a spring, an electromagnet unit, etc., and its function is to disconnect or connect the pilot oil circuit according to the force of the electromagnet unit; the main valve unit consists of a spring, a spring seat, a push rod, a valve, a guide sleeve, a valve seat, a bushing, a valve seat, etc., and its function is to disconnect or connect the main oil circuit; the cut-off valve is mainly composed of a push rod, an iron core, a valve seat, a positioning sleeve assembly, a spring seat, a spring, etc., and its function is to cut off the pressure oil inlet of the solenoid valve in an emergency.

[0025] In a feasible implementation, the D1, D2, and D3 electromagnets are powered off.

[0026] like Figure 4 As shown, when the D3 electromagnet is powered off, the electromagnetic force disappears, and the hydraulic pressure and spring force press the steel ball valve 1 against the right valve seat, cutting off the oil path of the high-pressure oil entering the main valve control chamber from the product P port. At the same time, the steel ball valve 3 is pushed by the push rod 2 to make it leave the left valve seat, connecting the oil path from the main valve control chamber to the product oil return port T to relieve the pressure. Under the action of the hydraulic pressure at its right end, the main valve overcomes the elastic force of its return spring and moves to the left, pressing against the left valve seat, cutting off the oil path between the P1 port and the T port, and connecting the oil path between the P port and the P1 port. At this time, the system pressure oil flows through the product P port to the oil inlet P1 of the two two-position three-way hydraulic solenoid valves.

[0027] When the D1 solenoid is powered off, the electromagnetic force disappears, and the steel ball valve 6 leaves the right valve seat under the action of hydraulic pressure and presses tightly on the left valve seat, cutting off the oil path from the control chamber of the main valve 1 to the product oil return port T. At this time, the high-pressure oil flows from the product P1 port through the right valve seat of the pilot valve into the control chamber of the main valve 1 to increase its pressure. At this time, the hydraulic pressure at both ends of the main valve 1 is equal, and the main valve 1 moves to the right under the elastic force of the return spring and presses tightly on the right valve seat, cutting off the oil path between the P (P1) port and the B port, and connecting the oil path between the B port and the T port.

[0028] When the D2 electromagnet is powered off, the electromagnetic force disappears, and the steel ball valve 5 leaves the left valve seat under the action of the hydraulic pressure and presses against the right valve seat, cutting off the oil path from the control chamber of the main valve 2 to the product oil return port T. At this time, the high-pressure oil flows from the product P1 port through the left valve seat of the pilot valve into the control chamber of the main valve 2 to increase its pressure. At this time, the hydraulic pressure at both ends of the main valve 2 is equal, and the main valve 2 moves to the left under the elastic force of the reset spring, pressing against the left valve seat, cutting off the oil path between the P (P1) port and the A port, and connecting the oil path between the A port and the T port. In summary, when the D1, D2, and D3 electromagnets are all in the power-off state, the product P port is closed, and the A and B ports are connected to the T port.

[0029] D1 electromagnet is powered on, D2 and D3 electromagnets are powered off

[0030] like Figure 5 As shown, when the D3 electromagnet is powered off, the electromagnetic force disappears, and the hydraulic pressure and spring force press the steel ball valve 1 against the right valve seat, cutting off the oil path of the high-pressure oil entering the main valve control chamber from the product P port. At the same time, the steel ball valve 3 is pushed by the push rod 2 to make it leave the left valve seat, connecting the oil path from the main valve control chamber to the product oil return port T to relieve the pressure. Under the action of the hydraulic pressure at its right end, the main valve overcomes the elastic force of its return spring and moves to the left, pressing against the left valve seat, cutting off the oil path between the P1 port and the T port, and connecting the oil path between the P port and the P1 port. At this time, the system pressure oil flows through the product P port to the oil inlet port P1 of the two two-position three-way solenoid valves.

[0031] When the D2 electromagnet is powered off, the electromagnetic force disappears, and the steel ball valve 5 leaves the left valve seat under the action of the hydraulic pressure and presses tightly on the right valve seat, cutting off the oil path from the control chamber of the main valve 2 to the product oil return port T. At this time, the high-pressure oil flows from the product P (P1) port through the left valve seat of the pilot valve into the control chamber of the main valve 2 to increase its pressure. At this time, the hydraulic pressure at both ends of the main valve 2 is equal, and the main valve 2 moves to the left under the elastic force of the return spring and presses tightly on the left valve seat, cutting off the oil path between the P (P1) port and the A port, and connecting the oil path between the A port and the T port.

[0032] When the electromagnet D1 is energized, an electromagnetic attraction is generated between the armature and the iron core. The electromagnetic force pushes the steel ball valve 6 through the push rod, causing it to leave the left valve seat and press against the right valve seat, cutting off the oil path from the control chamber of the main valve 1 to the product oil inlet P (P1). At the same time, the oil path from the control chamber of the main valve 1 to the product oil return port T is connected to relieve the pressure. At this time, the hydraulic pressure overcomes the elastic force of the return spring to cause the main valve 1 to move to the left and press against the left valve seat, cutting off the oil path between port B and port T, and connecting the oil path between port P (P1) and port B.

[0033] To summarize, when the D2 and D3 electromagnets are in the power-off state and the D1 electromagnet is energized, the product's P port is connected to the B port, and the A port is connected to the T port.

[0034] D2 electromagnet is powered on, D1 and D3 electromagnets are powered off

[0035] As shown in Figure 6, when the D1 electromagnet is powered off, the electromagnetic force disappears, and the steel ball valve 6 leaves the right valve seat under the action of the hydraulic pressure and presses tightly on the left valve seat, cutting off the oil path from the control chamber of the main valve 1 to the product oil return port T. At this time, the high-pressure oil flows from the product P (P1) port through the right valve seat of the pilot valve into the control chamber of the main valve 1 to increase its pressure. At this time, the hydraulic pressure at both ends of the main valve 1 is equal, and the main valve 1 moves to the right under the elastic force of the return spring and presses tightly on the right valve seat, cutting off the oil path between the P (P1) port and the B port, and connecting the oil path between the B port and the T port. When the D2 electromagnet is energized, an electromagnetic attraction is generated between the armature and the iron core. The electromagnetic force pushes the steel ball valve 5 through the push rod, causing it to leave the right valve seat and press against the left valve seat, cutting off the oil path from the control chamber of the main valve 2 to the product oil inlet P (P1). At the same time, the oil path from the control chamber of the main valve 2 to the product oil return port T is connected to relieve the pressure. At this time, the hydraulic pressure overcomes the elastic force of the return spring to cause the main valve 2 to move to the right and press against the right valve seat, cutting off the oil path between port A and port T, and connecting the oil path between port P (P1) and port A.

[0036] To summarize, when the D1 and D3 electromagnets are in the power-off state and the D2 electromagnet is energized, the product's P port is connected to the A port, and the B port is connected to the T port.

[0037] D3 electromagnet is powered on, D1 and D2 electromagnets are powered off or on

[0038] As shown in Figure 7, when the D3 electromagnet is energized, an electromagnetic attraction is generated between the armature and the iron core in the D3 electromagnet. The electromagnetic force pushes the steel ball valve 3 through the push rod 4, pressing it tightly against the left valve seat, cutting off the oil path from the main valve control chamber to the product oil return port T. At the same time, the steel ball valve 1 is pushed by the push rod 2 to leave the right valve seat, connecting the oil path from the main valve control chamber to the product oil inlet P and pressurizing it. At this time, the hydraulic pressure at both ends of the main valve is equal. The main valve moves to the right under the elastic force of the reset spring and presses against the right valve seat, cutting off the oil path between the P1 port and the P port, and connecting the oil path between the T port and the P1 port. At this time, the pressure of the oil inlet P1 of the two two-position three-way solenoid valves on the left end is 0.

Claims

1. A combined hydraulic valve for a high lift system, characterized in that: The combined hydraulic valve is composed of an electric connector unit, a housing assembly unit, a pilot control unit and a main valve unit; Among them, an oil filter assembly is arranged at the oil inlet of the pilot control unit, and the oil filter assembly is used to prevent foreign matter from entering the inner cavity of the pilot valve, thereby avoiding abnormal opening or closing of the pilot valve.

2. The combined hydraulic valve of the high lift system according to claim 1, characterized in that: A sliding ring combination seal is adopted between the guide rod and the guide sleeve of the main valve unit.

3. The combined hydraulic valve of the high lift system according to claim 2, characterized in that: There is no oil leakage between the guide rod and the guide sleeve, and the matching clearance is appropriately increased. After the clearance is increased, it is possible to avoid the valve being stuck and unable to switch normally due to oil contamination, thereby improving the product's anti-pollution ability.

4. The combined hydraulic valve of the high lift system according to claim 3, characterized in that: The combined hydraulic valve also includes: The cut-off valve is used to quickly cut off the pressure oil inlet line of the system.

5. The combined hydraulic valve of the high lift system according to claim 4, characterized in that: The pilot control unit also includes a steel ball, an elastic washer, a guide sleeve and an electromagnet unit.

6. The combined hydraulic valve of the high lift system according to claim 4, characterized in that: The cut-off valve is composed of a push rod, an iron core, a valve seat, a positioning sleeve assembly, a spring seat and a spring.

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