Device and method for controlling folding and unfolding of rotor wing and oblique beam of helicopter

Abstract

The invention provides a device and a method for controlling folding and unfolding of a rotor wing and an oblique beam of a helicopter, and the device comprises a folding / unfolding electromagnetic valve which is used for controlling high-pressure hydraulic oil to flow into a folding / unfolding hydraulic system of the rotor wing and the oblique beam; the rotor brake electromagnetic valve is connected with the folding / unfolding electromagnetic valve, and the rotor brake electromagnetic valve is used for controlling the high-pressure hydraulic oil to flow into a rotor brake device through a rotor brake pressure supply port; the rotor wing folding electromagnetic valve is connected with the folding / unfolding electromagnetic valve, and the rotor wing folding electromagnetic valve is used for controlling high-pressure hydraulic oil to flow into a rotor wing folding pressure supply port; the rotor wing unfolding electromagnetic valve is connected with the folding / unfolding electromagnetic valve, and the rotor wing unfolding electromagnetic valve is used for controlling the high-pressure hydraulic oil to flow into a rotor wing unfolding pressure supply port; wherein the folding / unfolding electromagnetic valve and the rotor wing folding electromagnetic valve form a rotor wing folding pressure supply oil way; and the folding / unfolding electromagnetic valve and the rotor wing unfolding electromagnetic valve form a rotor wing unfolding pressure supply oil way.

Description

Technical Field

[0001] This application belongs to the technical field of helicopter folding hydraulic systems, and particularly relates to a device and method for controlling the folding and unfolding of helicopter rotors and inclined beams. Background Art

[0002] To enable the helicopter rotor and inclined beam to be folded or unfolded at specified positions and in a specified order, it is necessary to control the folding / unfolding of the rotor and inclined beam and the hydraulic pressure transmission of the rotor brake hydraulic system by manipulating modules such as the folding / unfolding solenoid valve, rotor folding solenoid valve, rotor unfolding solenoid valve, and rotor brake solenoid valve of the folding hydraulic system.

[0003] In the past, the helicopter folding hydraulic system distributed and arranged the above-mentioned components according to different functions achieved. The components were connected by oil passage channels, which had the disadvantages of heavy weight, large volume, many channels, inconvenient installation and maintenance, and poor reliability. Summary of the Invention

[0004] Object of the Invention: This application hopes to provide a technical solution for centrally installing components such as the folding / unfolding solenoid valve, rotor folding solenoid valve, rotor unfolding solenoid valve, and rotor brake solenoid valve to overcome or at least mitigate at least one of the above defects of the prior art.

[0005] In a first aspect, this application provides a device for controlling the folding and unfolding of a helicopter rotor and inclined beam, the device comprising:

[0006] A folding / unfolding solenoid valve 1 for controlling high-pressure hydraulic oil to flow into the folding / unfolding hydraulic system of the rotor and inclined beam;

[0007] A rotor brake solenoid valve 2 connected to the folding / unfolding solenoid valve 1, the rotor brake solenoid valve 2 being used to control high-pressure hydraulic oil to flow into the rotor brake device through the rotor brake pressure supply port XP2;

[0008] A rotor folding solenoid valve 5 connected to the folding / unfolding solenoid valve 1, the rotor folding solenoid valve 5 being used to control high-pressure hydraulic oil to flow into the rotor folding pressure supply port DP2;

[0009] A rotor unfolding solenoid valve 7 connected to the folding / unfolding solenoid valve 1, the rotor unfolding solenoid valve 7 being used to control high-pressure hydraulic oil to flow into the rotor unfolding pressure supply port DP3;

[0010] Wherein, the folding / unfolding solenoid valve 1 and the rotor folding solenoid valve 5 form a rotor folding pressure supply oil circuit; the folding / unfolding solenoid valve 1 and the rotor unfolding solenoid valve 7 form a rotor unfolding pressure supply oil circuit.

[0011] Preferably, the device further comprises:

[0012] The first safety valve 4 is arranged downstream of the rotor folding pressure supply oil circuit, and the first safety valve 4 is used to protect the pressure of the rotor folding pressure supply oil circuit from exceeding the system specified value;

[0013] The second safety valve 6 is arranged downstream of the rotor unfolding pressure supply oil circuit, and the second safety valve 6 is used to protect the pressure of the rotor unfolding pressure supply oil circuit from exceeding the system specified value;

[0014] The one-way valve 3 is arranged on the oil return passage of the rotor folding pressure supply oil circuit and the rotor unfolding pressure supply oil circuit, and is used to prevent the reverse oil flow during the rotor folding / unfolding of the system from affecting the folding hydraulic system.

[0015] Preferably, the device is further provided with 7 oil circuit interfaces: the folding hydraulic system oil return port ZR5, the folding hydraulic system pressure supply port FP, the diagonal beam folding / unfolding system pressure supply port DP1, the rotor folding system pressure supply port DP2, the rotor unfolding system pressure supply port DP3, the diagonal beam folding / unfolding system oil return port DR1, the rotor brake solenoid valve pressure supply port XP1, and the rotor brake system pressure supply port XP2. Each interface is communicated with the rotor and the diagonal beam folding and unfolding hydraulic oil circuits.

[0016] Preferably, when the folding / unfolding solenoid valve 1 is energized, its outlet is communicated with the folding hydraulic system pressure supply port FP, and when it is not energized, its outlet is communicated with the folding hydraulic system oil return port ZR5.

[0017] Preferably, when the rotor brake solenoid valve 2 is energized, its outlet is communicated with the folding hydraulic system oil return port ZR5, and when it is not energized, its outlet is communicated with the high-pressure hydraulic source pressure supply port XP1.

[0018] Preferably, when the rotor folding solenoid valve 5 is energized, its outlet is communicated with the folding hydraulic system pressure supply port FP, and when it is not energized, its outlet is communicated with the folding hydraulic system oil return port ZR5.

[0019] Preferably, when the rotor unfolding solenoid valve 7 is energized, its outlet is communicated with the folding hydraulic system pressure supply port FP, and when it is not energized, its outlet is communicated with the folding hydraulic system oil return port ZR5.

[0020] In a second aspect, the present application further provides a method for controlling the folding and unfolding of a helicopter rotor and diagonal beam. The method is applied to the device as described above, and the method includes:

[0021] The method for the folding and unfolding of the rotor includes:

[0022] Step 1: The rotor brake solenoid valve 2 is energized, the hydraulic oil in the rotor brake device flows back from the pressure supply port XP2 to the oil return port ZR5, the rotor brake is released, and the tail rotor disc is rotated to the specified position according to the specified position and sequence;

[0023] Step 2: The rotor brake solenoid valve 2 is de-energized until the rotor folding is completed. High-pressure hydraulic oil flows into the rotor brake device to perform rotor braking and complete the tail rotor positioning. The rotor brake solenoid valve 2 maintains a low-leakage state, enabling the rotor brake pressure supply oil circuit to have a long pressure-holding time.

[0024] Step 3: The folding / unfolding solenoid valve 1 is energized. High-pressure hydraulic oil enters the device from the pressure supply port FP through the folding / unfolding solenoid valve 1. The rotor folding solenoid valve 5 is energized according to the control logic to control the high-pressure hydraulic oil to flow into the rotor folding pressure supply port DP2, supplying pressure to the rotor folding actuators of the downstream system, so that the rotor folds according to the specified position and sequence. When the pressure of the rotor folding pressure supply oil circuit exceeds the specified value, the first safety valve 4 opens, and a part of the oil flows out from the oil return port ZR5 of the folding hydraulic system to reduce the oil circuit pressure, thus avoiding damage to the rotor folding system.

[0025] Step 4: The folding / unfolding solenoid valve 1 is energized. High-pressure hydraulic oil enters the device from the pressure supply port FP through the folding / unfolding solenoid valve 1. The rotor unfolding solenoid valve 7 is energized according to the control logic to control the high-pressure hydraulic oil to flow into the rotor unfolding pressure supply port DP3, supplying pressure to the rotor unfolding actuators of the downstream system, so that the rotor unfolds according to the specified position and sequence. When the pressure of the rotor unfolding pressure supply oil circuit exceeds the specified value, the second safety valve 6 opens, and a part of the oil flows out from the oil return port ZR5 of the folding hydraulic system to reduce the oil circuit pressure, thus avoiding damage to the rotor unfolding system. The check valve 3 is used to prevent reverse oil from flowing back to the rotor unfolding pressure supply oil circuit through the rotor folding pressure supply port DP2 and the rotor unfolding pressure supply port DP3 during the rotor folding / unfolding process.

[0026] The method for folding and unfolding the diagonal beam includes: The folding / unfolding solenoid valve 1 is energized, and high-pressure hydraulic oil flows from the pressure supply port FP into the diagonal beam folding / unfolding pressure supply port DP1 to connect or disconnect the diagonal beam folding / unfolding pressure supply oil circuit.

[0027] The present application has the following technical effects:

[0028] In the present application, the folding / unfolding of each rotor and diagonal beam and the hydraulic components for controlling the pressure transmission of rotor braking are integrated into a whole device, which is compact in structure, light in weight and small in volume; the external pipeline connection is reduced, the flow resistance is small, and the risk of oil leakage is greatly reduced; the whole device is bolted to the on-board structure, which is convenient for installation and disassembly; each hydraulic component on the device can be disassembled and assembled separately, which is convenient for maintenance and replacement; a rotor brake solenoid valve with low leakage is provided, which greatly increases the pressure-holding time of the rotor brake pressure supply oil circuit; the check valve and safety valve are integrated on the device, which effectively improves the safety and reliability of the helicopter rotor folding / unfolding hydraulic system. Description of the Drawings

[0029] Figure 1 It is a schematic structural diagram of a rotor and inclined beam folding and unfolding control device provided by an embodiment of the present application;

[0030] Figure 2 It is a schematic principle diagram of a rotor and inclined beam folding and unfolding control device provided by an embodiment of the present application;

[0031] Wherein: 1 folding / unfolding solenoid valve; 2 rotor brake solenoid valve; 3 check valve; 4 first safety valve; 5 rotor folding solenoid valve; 6 second safety valve; 7 rotor unfolding solenoid valve; ZR5 return oil port of the folding hydraulic system; FP supply pressure port of the folding hydraulic system; DP1 supply pressure port of the inclined beam folding / unfolding system; DP2 supply pressure port of the rotor folding system; DP3 supply pressure port of the rotor unfolding system; DR1 return oil port of the inclined beam folding / unfolding system; XP1 supply pressure port of the rotor brake solenoid valve; XP2 supply pressure port of the rotor brake system. Specific embodiments

[0032] Please refer to Figure 1 - Figure 2 , the present application provides a device for controlling the folding and unfolding of helicopter rotors and inclined beams. By integrating the functions of hydraulic components for controlling the folding / unfolding of rotors and inclined beams and the pressure transmission control of rotor brakes, and providing a method for controlling the folding and unfolding of helicopter rotors and inclined beams, it is characterized in that it is applied to the above-mentioned device to realize the folding and unfolding of rotors and inclined beams. The following will describe the embodiments in detail with reference to the accompanying drawings.

[0033] This device includes: a folding / unfolding solenoid valve 1, a rotor brake solenoid valve 2, a check valve 3, a first safety valve 4, a rotor folding solenoid valve 5, a second safety valve 6, and a rotor unfolding solenoid valve 7.

[0034] The folding / unfolding solenoid valve 1, the rotor brake solenoid valve 2, the rotor folding solenoid valve 5, and the rotor unfolding solenoid valve 7 are fixed to the device by bolts. The first safety valve 4, the second safety valve 6, and the check valve 3 are fixed to the device by threaded insertion. The two groups of safety valves are respectively used to protect the pressure of the rotor folding supply oil circuit and the rotor unfolding supply oil circuit from exceeding the system specified value; the check valve 3 is used to prevent the reverse oil flow during the folding / unfolding of the rotor from affecting the folding hydraulic system. On the basis of meeting the functions and performance of the folding / unfolding of rotors and inclined beams and the pressure transmission control of rotor brakes, the integrated structural design makes the device have the characteristics of compact structure, light weight, and small volume. At the same time, it also reduces the external pipeline connection, making the hydraulic oil flow resistance of the rotor and inclined beam folding and unfolding small, and greatly reducing the risk of oil leakage.

[0035] The whole device is installed on the helicopter structure by bolt connection, which is convenient for installation and disassembly.

[0036] The device is provided with 7 oil circuit interfaces: the return oil port ZR5 of the folding hydraulic system is used to connect to the system return oil circuit, the pressure supply port FP of the folding hydraulic system is used to connect to the system pressure supply oil circuit, the pressure supply port DP1 of the diagonal beam folding / unfolding system is used to connect to the diagonal beam folding / unfolding system pressure supply oil circuit, the pressure supply port DP2 of the rotor folding system is used to connect to the rotor folding system pressure supply oil circuit, the pressure supply port DP3 of the rotor unfolding system is used to connect to the rotor unfolding system pressure supply oil circuit, the return oil port DR1 of the diagonal beam folding / unfolding system is used to connect to the diagonal beam folding / unfolding system return oil circuit, the pressure supply port XP1 of the rotor brake solenoid valve is used to connect to the rotor brake solenoid valve pressure supply oil circuit, and the pressure supply port XP2 of the rotor brake system is used to connect to the rotor brake device pressure supply oil circuit. Each interface is connected to the outside in the form of a straight pipe joint.

[0037] The present device is used for a method of controlling the folding and unfolding of helicopter rotors and diagonal beams, and its specific implementation is as follows:

[0038] Before rotor folding, the folding rotor brake solenoid valve 2 is energized, so that the rotor brake device flows back from the rotor brake pressure supply port XP2 to the return oil port ZR5, and the rotor brake is released for the tail rotor disc feathering positioning operation.

[0039] When the disc feathering positioning is completed, the rotor brake solenoid valve 2 is de-energized until the rotor folding is completed. The rotor brake pressure supply oil circuit is connected, and high-pressure hydraulic oil flows from the pressure supply port XP1 into the rotor brake pressure supply port XP2 to brake the rotor, and the tail rotor positioning ends.

[0040] In this embodiment, a low-leakage rotor brake solenoid valve 2 is provided in the device, so that the rotor brake pressure supply oil circuit has a long pressure holding time, effectively ensuring the stability of the rotor braking process.

[0041] The folding / unfolding solenoid valve 1 is energized, and high-pressure hydraulic oil enters the product from the pressure supply port FP through the folding / unfolding solenoid valve 1. The rotor folding solenoid valve 5 is energized according to the control logic, and the rotor folding pressure supply oil circuit is connected to control the high-pressure hydraulic oil to flow into the rotor folding pressure supply port DP2 to supply pressure to the rotor folding actuating element of the downstream system, so that the rotor folds according to the specified position and sequence.

[0042] The folding / unfolding solenoid valve 1 is energized, and high-pressure hydraulic oil enters the product from the pressure supply port FP through the folding / unfolding solenoid valve 1. The rotor unfolding solenoid valve 7 is energized according to the control logic, and the rotor unfolding pressure supply oil circuit is connected to control the high-pressure hydraulic oil to flow into the rotor unfolding pressure supply port DP3 to supply pressure to the rotor unfolding actuating element of the downstream system, so that the rotor unfolds according to the specified position and sequence.

[0043] In this embodiment, when the pressure of the supply oil circuit for rotor folding exceeds the specified value, the first safety valve 4 opens, and a part of the oil flows out from the oil return port ZR5 of the folding hydraulic system, reducing the oil circuit pressure and thus avoiding damage to the rotor folding system. When the pressure of the supply oil circuit for rotor deployment exceeds the specified value, the second safety valve 6 opens, and a part of the oil flows out from the oil return port ZR5 of the folding hydraulic system, reducing the oil circuit pressure and thus avoiding damage to the rotor deployment system. At the same time, the device also provides a group of check valves 3 to prevent reverse oil from flowing back through the rotor folding supply port DP2 and the rotor deployment supply port DP3 during the rotor folding and deployment processes, which may affect the folding hydraulic system. The application of the integrated safety valve and check valve in the device effectively improves the safety and reliability of the helicopter rotor folding / unfolding hydraulic system.

[0044] In this embodiment, the device is also equipped with the supply port DP1 and the oil return port DR1 for the slant beam folding / unfolding system to connect the slant beam folding / unfolding hydraulic circuit. When the slant beam is folded or deployed, the folding / unfolding solenoid valve 1 is energized according to the control logic, and the high-pressure hydraulic oil flows into the supply port DP1 of the slant beam folding / unfolding system from the supply port FP, realizing the pressurization of the slant beam folding / unfolding hydraulic circuit.

Claims

1. A device for controlling the folding and unfolding of a helicopter rotor and a diagonal beam, characterized in that The device includes: A folding / unfolding solenoid valve (1) for controlling the inflow of high-pressure hydraulic oil into the folding / unfolding hydraulic systems of the rotor and the diagonal beam; A rotor brake solenoid valve (2) connected to the folding / unfolding solenoid valve (1), and the rotor brake solenoid valve (2) is used to control the inflow of high-pressure hydraulic oil into the rotor brake device through the rotor brake pressure supply port (XP2); A rotor folding solenoid valve (5) connected to the folding / unfolding solenoid valve (1), and the rotor folding solenoid valve (5) is used to control the inflow of high-pressure hydraulic oil into the rotor folding pressure supply port (DP2); A rotor unfolding solenoid valve (7) connected to the folding / unfolding solenoid valve (1), and the rotor unfolding solenoid valve (7) is used to control the inflow of high-pressure hydraulic oil into the rotor unfolding pressure supply port (DP3); Wherein, the folding / unfolding solenoid valve (1) and the rotor folding solenoid valve (5) form a rotor folding pressure supply oil circuit; the folding / unfolding solenoid valve (1) and the rotor unfolding solenoid valve (7) form a rotor unfolding pressure supply oil circuit.

2. The device according to claim 1, wherein The device further includes: A first safety valve (4) arranged downstream of the rotor folding pressure supply oil circuit, and the first safety valve (4) is used to protect the pressure of the rotor folding pressure supply oil circuit from exceeding the system specified value; A second safety valve (6) arranged downstream of the rotor unfolding pressure supply oil circuit, and the second safety valve (6) is used to protect the pressure of the rotor unfolding pressure supply oil circuit from exceeding the system specified value; A check valve (3) arranged on the oil return channels of the rotor folding pressure supply oil circuit and the rotor unfolding pressure supply oil circuit, and is used to prevent the reverse oil flow during the rotor folding / unfolding of the system from affecting the folding hydraulic system.

3. The device according to claim 2, characterized in that The device is also provided with 7 oil circuit interfaces: the folding hydraulic system oil return port (ZR5), the folding hydraulic system pressure supply port (FP), the diagonal beam folding / unfolding system pressure supply port (DP1), the rotor folding system pressure supply port (DP2), the rotor unfolding system pressure supply port (DP3), the diagonal beam folding / unfolding system oil return port (DR1), the rotor brake solenoid valve pressure supply port (XP1), and the rotor brake system pressure supply port (XP2), and each interface is communicated with the rotor and the diagonal beam folding and unfolding hydraulic oil circuits.

4. The device according to claim 3, characterized in that, When the folding / unfolding solenoid valve (1) is energized, its outlet communicates with the folding hydraulic system pressure supply port (FP), and when it is not energized, its outlet communicates with the folding hydraulic system oil return port (ZR5).

5. The device according to claim 4, characterized in that, When the rotor brake solenoid valve (2) is energized, its outlet communicates with the folding hydraulic system oil return port (ZR5), and when it is not energized, its outlet communicates with the high-pressure hydraulic source pressure supply port (XP1).

6. The device according to claim 5, characterized in that When the rotor folding solenoid valve (5) is energized, its outlet communicates with the folding hydraulic system pressure supply port (FP), and when it is not energized, its outlet communicates with the folding hydraulic system oil return port (ZR5).

7. The device according to claim 6, characterized in that When the rotor unfolding solenoid valve (7) is energized, its outlet communicates with the folding hydraulic system pressure supply port (FP), and when it is not energized, its outlet communicates with the folding hydraulic system oil return port (ZR5).

8. A method for controlling the folding and unfolding of a helicopter rotor and a diagonal beam, characterized in that, The method is applied to the device according to any one of claims 1-7, and the method includes: The method for rotor folding and unfolding includes: Step 1: Energize the rotor brake solenoid valve (2). The hydraulic oil in the rotor brake device flows back from the pressure supply port (XP2) to the oil return port (ZR5), releasing the rotor brake. Pitch the tail rotor disc to the specified position according to the specified position and sequence. Step 2: De-energize the rotor brake solenoid valve (2) until the rotor folding is completed. High-pressure hydraulic oil flows into the rotor brake device to apply the rotor brake and complete the tail rotor positioning. The rotor brake solenoid valve (2) maintains a state of low leakage, enabling the rotor brake pressure supply oil circuit to have a long pressure holding time. Step 3: Energize the folding / unfolding solenoid valve (1). High-pressure hydraulic oil enters the device from the pressure supply port (FP) through the folding / unfolding solenoid valve (1). The rotor folding solenoid valve (5) is energized according to the control logic, controlling the high-pressure hydraulic oil to flow into the rotor folding pressure supply port (DP2) to supply pressure to the rotor folding actuator of the downstream system, causing the rotor to fold according to the specified position and sequence. When the pressure of the rotor folding pressure supply oil circuit exceeds the specified value, the first safety valve (4) opens, and a part of the oil flows out from the folding hydraulic system oil return port (ZR5) to reduce the oil circuit pressure, thus avoiding damage to the rotor folding system. Step 4: Energize the folding / unfolding solenoid valve (1). High-pressure hydraulic oil enters the device from the pressure supply port (FP) through the folding / unfolding solenoid valve (1). The rotor unfolding solenoid valve (7) is energized according to the control logic, controlling the high-pressure hydraulic oil to flow into the rotor unfolding pressure supply port (DP3) to supply pressure to the rotor unfolding actuator of the downstream system, causing the rotor to unfold according to the specified position and sequence. When the pressure of the rotor unfolding pressure supply oil circuit exceeds the specified value, the second safety valve (6) opens, and a part of the oil flows out from the folding hydraulic system oil return port (ZR5) to reduce the oil circuit pressure, thus avoiding damage to the rotor unfolding system. The check valve (3) is used to prevent reverse oil from flowing back to the rotor unfolding pressure supply oil circuit through the rotor folding pressure supply port (DP2) and the rotor unfolding pressure supply port (DP3) during the rotor folding / unfolding process. The method for folding and unfolding the diagonal beam includes: Energize the folding / unfolding solenoid valve (1). High-pressure hydraulic oil flows from the pressure supply port (FP) into the diagonal beam folding / unfolding pressure supply port (DP1) to connect or disconnect the diagonal beam folding / unfolding pressure supply oil circuit.

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