A nozzle control oil circuit supply device for a parallel turbo ram combined engine

Abstract

This invention discloses a nozzle control oil supply device for a parallel turbo-ramjet combined engine, comprising a turbine nozzle control component, a ramjet nozzle control component, a turbopump, a ramjet pump, and an oil circuit switching device. The oil circuit switching device includes a first reversing valve and a second reversing valve. The first reversing valve has a first inlet, a second inlet, a first outlet, and a second outlet on its valve body. The second reversing valve has a third inlet, a fourth inlet, a third outlet, and a fourth outlet on its valve body. The first and third inlets communicate with the outlet of the ramjet pump, the second and fourth inlets communicate with the outlet of the turbopump, the second outlet communicates with the turbine nozzle control component, and the third outlet communicates with the ramjet nozzle control component. The purpose of this invention is to provide a nozzle control oil supply device for a parallel turbo-ramjet combined engine capable of maintaining control oil in both the turbine duct nozzle and the ramjet duct nozzle for an extended period.

Description

Technical Field

[0001] This invention relates to combined engines, and more particularly to a nozzle control oil supply device for a parallel turbo-ramjet combined engine. Background Technology

[0002] A parallel turbo-ramjet combined engine is an engine composed of a turbofan engine and a ramjet engine connected in parallel. After the aircraft takes off from the ground, the turbofan engine alone provides power to the aircraft until the flight speed reaches Mach 2.5. When the aircraft's flight speed is between Mach 2.5 and Mach 3, the turbofan engine and the ramjet engine work together to provide power to the aircraft. When the aircraft's flight speed is above Mach 3, the ramjet engine alone provides power to the aircraft.

[0003] In a parallel turbo-ramjet combined engine, the turbine and ramjet engines share the same intake duct to capture airflow. An intake regulating device is installed at the intake duct port to distribute the airflow into either the turbine or ramjet duct. Each duct has an exhaust port and an adjustable nozzle; therefore, the operation of either nozzle will always affect the airflow in the other duct. To ensure the normal operation of the parallel turbo-ramjet combined engine, the nozzles of both the turbine and ramjet ducts must automatically adjust within the full operating envelope of the combined engine. This requires that the turbine nozzle still have driving oil to control it when the turbine engine is not operating, and similarly, the ramjet nozzle must also have driving oil to control it when the ramjet engine is not operating.

[0004] Currently, the high-pressure oil source for turbine duct nozzles is generally a servo oil pump driven by the accessory gearbox. When the turbine engine is not in operation, the servo oil pump will stop supplying oil. The high-pressure oil source for ramjet duct nozzles is generally an electric pump or an air turbine pump. When the ramjet engine is not in operation, the electric pump or air turbine pump will stop supplying oil. Therefore, whether it is a turbine duct nozzle or a ramjet duct nozzle, there is always a situation during aircraft takeoff and flight where the control of the driving oil is lost due to the cessation of oil supply, which is very detrimental to the flight of the aircraft. Summary of the Invention

[0005] Purpose of the invention: The purpose of this invention is to provide a nozzle control oil supply device for a parallel turbo-ramjet engine that can maintain the presence of control oil in the nozzles of the turbine duct and the ramjet duct for control purposes.

[0006] Technical Solution: The present invention discloses a nozzle control oil supply device for a parallel turbo-ramjet combined engine, comprising a turbine nozzle control component, a ramjet nozzle control component, a turbopump for supplying oil to the turbine nozzle control component, and a ramjet pump for supplying oil to the ramjet nozzle control component. It also includes an oil circuit switching device, comprising a first reversing valve and a second reversing valve. The first reversing valve has a first inlet and a second inlet on its first inlet side, and a first outlet and a second outlet on its first outlet side opposite to the first inlet side. The second reversing valve has a third inlet and a fourth inlet on its second inlet side, and a third outlet and a fourth outlet on its second outlet side opposite to the second inlet side. The first and third inlets are connected to the outlet of the ramjet pump via oil circuits, and the second and fourth inlets are connected to the outlet of the turbopump via oil circuits. The second outlet of the first reversing valve is connected to the turbine nozzle control component via an oil circuit, and the third outlet of the second reversing valve is connected to the ramjet nozzle control component via an oil circuit.

[0007] Furthermore, in the first position of the first directional valve, the first inlet is connected to the first outlet and the second inlet is connected to the second outlet; in the second position of the first directional valve, the first inlet is connected to the second outlet and the second inlet is connected to the first outlet; in the a position of the second directional valve, the third inlet is connected to the third outlet and the fourth inlet is connected to the fourth outlet; in the b position of the second directional valve, the third inlet is connected to the fourth outlet and the fourth inlet is connected to the third outlet.

[0008] Furthermore, both the first and second directional control valves are pressure directional control valves. The first directional control valve has a first upper directional control port at its top and a first lower directional control port at its bottom. The second directional control valve has a second upper directional control port at its top and a second lower directional control port at its bottom. The first and second upper directional control ports are connected to the outlet of the press pump via an oil passage, and the first and second lower directional control ports are connected to the outlet of the turbine pump via an oil passage.

[0009] Furthermore, both the first and second directional control valves are electromagnetic directional control valves.

[0010] Furthermore, it also includes a low-pressure oil tank for supplying oil to the turbo pump and the ram pump, the low-pressure oil tank being connected to the inlet of the turbo pump and the inlet of the ram pump respectively via oil passages.

[0011] Furthermore, the low-pressure oil tank is connected to the first outlet of the first reversing valve and the fourth outlet of the second reversing valve via an oil circuit.

[0012] Furthermore, a throttle nozzle is installed on the oil line between the first outlet and the low-pressure oil tank, and a throttle nozzle is installed on the oil line between the fourth outlet and the low-pressure oil tank.

[0013] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: By setting up an oil circuit switching device, the present invention ensures that the turbine nozzle control component and the ramjet nozzle control component are supplied with high-pressure control oil by a pump body under any circumstances, so that the turbine nozzle and the ramjet nozzle can be controlled to operate at any time, which is more conducive to the operation of the parallel turbo-ramjet combined engine. Attached Figure Description

[0014] Figure 1 A diagram showing the oil supply architecture for an existing parallel turbo-ramjet combined engine.

[0015] Figure 2 This is a schematic diagram of the simultaneous oil supply by the turbine pump and the ram pump in the first embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the first embodiment of the present invention when the turbine pump supplies oil and the ram pump does not supply oil.

[0017] Figure 4 This is a schematic diagram of the first embodiment of the present invention when the ram pump supplies oil and the turbine pump does not supply oil.

[0018] Figure 5 This is a schematic diagram of the first pressure reversing valve in the first embodiment of the present invention.

[0019] Figure 6 This is a schematic diagram of the second pressure reversing valve in the first embodiment of the present invention.

[0020] Figure 7 This is a schematic diagram of the second embodiment of the present invention when the turbine pump and the ram pump supply oil simultaneously and both the first electromagnetic reversing valve and the second electromagnetic reversing valve are de-energized.

[0021] Figure 8 This is a schematic diagram of the second embodiment of the present invention when the turbine pump does not supply oil and the ram pump supplies oil.

[0022] Figure 9 This is a schematic diagram of the second embodiment of the invention when the turbo pump supplies oil and the ram pump supplies oil.

[0023] Figure 10 This is a schematic diagram of the second embodiment of the present invention, showing the simultaneous oil supply from the turbine pump and the ram pump, with both the first and second solenoid directional valves energized.

[0024] Figure 11 This is a schematic diagram of the first electromagnetic reversing valve in the second embodiment of the present invention.

[0025] Figure 12 This is a schematic diagram of the second electromagnetic reversing valve in the second embodiment of the present invention.

[0026] The components include: 1. Low-pressure fuel tank; 2. Turbo pump; 201. Engine accessory housing; 3. Ram pump; 301. Air turbine; 4. Turbo nozzle control assembly; 401. Turbo nozzle; 5. Ram nozzle control assembly; 501. Ram nozzle; 6. First pressure directional valve; 601. First pressure inlet; 602. Second pressure inlet; 603. First pressure outlet; 604. Second pressure outlet; 605. First pressure upper directional valve; 606. First pressure lower directional valve; 7. Second pressure directional valve; 701. Third... 702. Pressure inlet; 703. Fourth pressure inlet; 704. Third pressure outlet; 705. Fourth pressure outlet; 706. Second pressure upper reversing port; 707. Second pressure lower reversing port; 8. First solenoid directional valve; 801. First solenoid inlet; 802. Second solenoid inlet; 803. First solenoid outlet; 804. Second solenoid outlet; 9. Second solenoid directional valve; 901. Third solenoid inlet; 902. Fourth solenoid inlet; 903. Third solenoid outlet; 904. Fourth solenoid outlet; 10. Throttling nozzle. Detailed Implementation

[0027] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0028] Appendix Figure 1 The diagram shows the oil supply architecture of an existing parallel turbo-ramjet combined engine, including a turbopump 2 and a ramjet pump 3. An engine accessory housing 201 (hereinafter referred to as the engine accessory housing) drives the turbopump 2 to rotate, and an air turbine 301 drives the ramjet pump 3 to rotate. The low-pressure oil tank 1 is connected to the inlet of the turbopump 2 and the inlet of the ramjet pump 3 through oil passages. The outlet of the turbopump 2 is connected to the turbine nozzle control assembly 4 through an oil passage. The turbine nozzle control assembly 4 is used to control the turbine nozzle 401 set in the turbine duct to increase or decrease in size. The outlet of the ramjet pump 3 is connected to the ramjet nozzle control assembly 5 through an oil passage. The ramjet nozzle control assembly 5 is used to control the ramjet nozzle 501 set in the ramjet duct to increase or decrease in size.

[0029] After the aircraft takes off from the ground, until its speed reaches Mach 2.5, the turbine engine alone provides power. During this time, the ramjet pump 3 does not supply fuel to the ramjet nozzle control assembly 5. When the aircraft's speed is between Mach 2.5 and Mach 3, the turbine engine and the ramjet engine work simultaneously to provide power. During this time, the turbopump 2 and the ramjet pump 3 supply fuel to the turbine nozzle control assembly 4 and the ramjet nozzle control assembly 5, respectively. When the aircraft's speed exceeds Mach 3, the ramjet engine alone provides power. During this time, the turbopump 2 does not supply fuel to the turbine nozzle control assembly 4. Therefore, the turbine nozzle 401 and the ramjet nozzle 501 may lose control due to the cessation of fuel supply, which is very detrimental to the aircraft's flight.

[0030] Example 1

[0031] See appendix Figures 2-6The present invention discloses a nozzle control oil supply device for a parallel turbo-ramjet combined engine (engine accessory housing 201, air turbine 301, turbine nozzle 401, and ramjet nozzle 501 are not shown for clarity), comprising a turbine nozzle control assembly 4, a ramjet nozzle control assembly 5, a turbo pump 2 for supplying oil to the turbine nozzle control assembly 4, a ramjet pump 3 for supplying oil to the ramjet nozzle control assembly 5, and a low-pressure oil tank 1. It also includes an oil circuit switching device, comprising a first pressure reversing valve 6 and a second pressure reversing valve 7. The first pressure reversing valve 6 has a first pressure inlet 601 and a second pressure inlet 602 on its first inlet side, and a first outlet side opposite to the first pressure inlet 601. The first pressure outlet 603 and the second pressure outlet 604 are connected. The first position of the first pressure directional valve 6 is that the first pressure inlet 601 communicates with the first pressure outlet 603 and the second pressure inlet 602 communicates with the second pressure outlet 604. The second position of the first pressure directional valve 6 is that the first pressure inlet 601 communicates with the second pressure outlet 604 and the second pressure inlet 602 communicates with the first pressure outlet 603. The first pressure inlet 601 is connected to the outlet of the ram pump 3 via an oil passage, and the second pressure inlet 602 is connected to the outlet of the turbine pump 2 via an oil passage. The second pressure outlet 604 of the first pressure directional valve 6 is connected to the turbine nozzle control assembly 4 via an oil passage. A first pressure upper reversing port 605 is provided at the top of the first pressure directional valve 6. A first pressure reversing valve 6 has a first pressure lower reversing port 606 at its bottom, a first pressure upper reversing port 605 connected to the outlet of the press pump 3 via an oil passage, and a first pressure lower reversing port 606 connected to the outlet of the turbine pump 2 via an oil passage. A second pressure reversing valve 7 has a third pressure inlet 701 and a fourth pressure inlet 702 on its second inlet side, and a third pressure outlet 703 and a fourth pressure outlet 704 on its second pressure outlet side opposite to the second inlet side. Position a of the second pressure reversing valve 7 is such that the third pressure inlet 701 and the third pressure outlet 703 are connected, and the fourth pressure inlet 702 and the fourth pressure outlet 704 are connected. Position b of the second pressure reversing valve 7 is such that the third pressure inlet 701 and the fourth pressure outlet 704 are connected. The outlet 704 is connected to the fourth pressure inlet 702 and the third pressure outlet 703. The third pressure inlet 701 is connected to the outlet of the ram pump 3 through an oil circuit. The fourth pressure inlet 702 is connected to the outlet of the turbo pump 2 through an oil circuit. The third pressure outlet 703 of the second pressure reversing valve 7 is connected to the ram nozzle control assembly 5 through an oil circuit. The top of the second pressure reversing valve 7 is provided with a second pressure upper reversing port 705, and the bottom of the second pressure reversing valve 7 is provided with a second pressure lower reversing port 706. The second pressure upper reversing port 705 is connected to the outlet of the ram pump 3 through an oil circuit, and the second pressure lower reversing port 706 is connected to the outlet of the turbo pump 2 through an oil circuit. The low-pressure oil tank 1 is connected to the inlet of the turbo pump 2 and the inlet of the ram pump 3 through an oil circuit.The low-pressure oil tank 1 is connected to the first pressure outlet 603 of the first pressure reversing valve 6 and the fourth pressure outlet 704 of the second pressure reversing valve 7 via oil circuits. A throttle nozzle 10 is installed on the oil circuit between the first pressure outlet 603 and the low-pressure oil tank 1, and a throttle nozzle 10 is also installed on the oil circuit between the fourth pressure outlet 704 and the low-pressure oil tank 1.

[0032] like Figure 2 As shown, when the outlets of turbopump 2 and ram pump 3 simultaneously supply oil at a pressure of 21 MPa, the first pressure directional valve 6 is in the first position, and the second pressure directional valve 7 is in the a-th position. The oil from the outlet of turbopump 2 flows through the second pressure outlet 604 of the first pressure directional valve 6 to the turbine nozzle control assembly 4, and the oil from the outlet of turbopump 2 returns to the low-pressure oil tank 1 through the fourth pressure outlet 704 of the second pressure directional valve 7. The oil from the outlet of ram pump 3 flows through the third pressure outlet 703 of the second pressure directional valve 7 to the ram pump nozzle control assembly 5, and the oil from the outlet of ram pump 3 returns to the low-pressure oil tank 1 through the first pressure outlet 603 of the first pressure directional valve 6.

[0033] like Figure 3 As shown, when the outlet oil supply pressure of turbopump 2 is 21 MPa and the outlet oil supply pressure of ram pump 3 is no greater than 1 MPa, the pressure of the second pressure lower reversing port 706 is greater than the pressure of the second pressure upper reversing port 705. Therefore, the second pressure reversing valve 7 switches to position b, while the first pressure reversing valve 6 remains in the first position. At this time, the oil from the outlet of turbopump 2 flows through the second pressure outlet 604 of the first pressure reversing valve 6 to the turbo nozzle control assembly 4, and the oil from the outlet of turbopump 2 flows through the third pressure outlet 703 of the second pressure reversing valve 7 to the ram nozzle control assembly 5. Meanwhile, the oil from the outlet of ram pump 3 returns to the low-pressure oil tank 1 through the first pressure outlet 603 of the first pressure reversing valve 6 and the fourth pressure outlet 704 of the second pressure reversing valve 7, thus ensuring that both the turbo nozzle control assembly 4 and the ram nozzle control assembly 5 are supplied with oil.

[0034] like Figure 4As shown, when the outlet oil supply pressure of turbopump 2 is no greater than 1 MPa and the outlet oil supply pressure of ram pump 3 is 21 MPa, the pressure of the first pressure upper reversing port 605 is greater than the pressure of the first pressure lower reversing port 606. Therefore, the first pressure reversing valve 6 switches to the second position, while the second pressure reversing valve 7 is still in the a position. At this time, the oil from the outlet of turbopump 2 returns to the low-pressure oil tank 1 through the first pressure outlet 603 of the first pressure reversing valve 6 and the fourth pressure outlet 704 of the second pressure reversing valve 7. The oil from the outlet of ram pump 3 flows to the turbine nozzle control assembly 4 through the second pressure outlet 604 of the first pressure reversing valve 6, and flows to the ram nozzle control assembly 5 through the third pressure outlet 703 of the second pressure reversing valve 7. This ensures that both the turbine nozzle control assembly 4 and the ram nozzle control assembly 5 are supplied with oil.

[0035] To ensure the stability of the oil circuit switching device during actual switching, a hysteresis design can be implemented for the switching timing of the first pressure directional valve 6 and the second pressure directional valve 7. The specific scheme is as follows.

[0036] 1) When the difference between the outlet oil pressure of the turbo pump 2 and the outlet oil pressure of the ram pump 3 is ≥10MPa, the oil source is switched. The turbo pump 2 and the ram pump 3 with higher pressure supply oil to the turbine nozzle control component 4 and the ram pump nozzle control component 5, and the turbo pump 2 and the ram pump 3 with lower pressure return to the low pressure oil tank 1 through the first pressure outlet 603 and the fourth pressure outlet 704.

[0037] 2) When the difference between the outlet oil pressure of turbo pump 2 and the outlet oil pressure of ram pump 3 is ≤5MPa, turbo pump 2 supplies oil to turbine nozzle control assembly 4 and ram pump 3 supplies oil to ram nozzle control assembly 5.

[0038] 3) When the difference between the outlet oil pressure of turbine pump 2 and the outlet oil pressure of ram pump 3 is ≤10MPa, the original state remains unchanged.

[0039] Example 2

[0040] See appendix Figures 7-12The present invention discloses a nozzle control oil supply device for a parallel turbo-ramjet combined engine (engine accessory housing 201, air turbine 301, turbine nozzle 401, and ramjet nozzle 501 are not shown for clarity), comprising a turbine nozzle control assembly 4, a ramjet nozzle control assembly 5, a turbo pump 2 for supplying oil to the turbine nozzle control assembly 4, a ramjet pump 3 for supplying oil to the ramjet nozzle control assembly 5, and a low-pressure oil tank 1. It also includes an oil circuit switching device, comprising a first electromagnetic directional valve 8 and a second electromagnetic directional valve 9. The first electromagnetic directional valve 8 has a first electromagnetic inlet 801 and a second electromagnetic inlet 801 on its first inlet side. A first electromagnetic outlet 803 and a second electromagnetic outlet 804 are provided on the first outlet side opposite to the first inlet side. The first position of the first electromagnetic directional valve 8 is that the first electromagnetic inlet 801 communicates with the first electromagnetic outlet 803 and the second electromagnetic inlet 802 communicates with the second electromagnetic outlet 804. The second position of the first electromagnetic directional valve 8 is that the first electromagnetic inlet 801 communicates with the second electromagnetic outlet 804 and the second electromagnetic inlet 802 communicates with the first electromagnetic outlet 803. The first electromagnetic inlet 801 is connected to the outlet of the press pump 3 via an oil passage, and the second electromagnetic inlet 802 is connected to the outlet of the turbine pump 2 via an oil passage. The second electromagnetic outlet 804 of the first electromagnetic directional valve 8... Outlet 804 is connected to turbine nozzle control assembly 4 via an oil circuit; a third electromagnetic inlet 901 and a fourth electromagnetic inlet 902 are provided on the second inlet side of the valve body of the second electromagnetic directional valve 9, and a third electromagnetic outlet 903 and a fourth electromagnetic outlet 904 are provided on the second outlet side opposite to the second inlet side. Position a of the second electromagnetic directional valve 9 is such that the third electromagnetic inlet 901 and the third electromagnetic outlet 903 are connected, and the fourth electromagnetic inlet 902 and the fourth electromagnetic outlet 904 are connected; position b of the second electromagnetic directional valve 9 is such that the third electromagnetic inlet 901 and the fourth electromagnetic outlet 904 are connected, and the fourth electromagnetic inlet 902 and the third electromagnetic outlet 903 are connected. The electromagnetic inlet 901 is connected to the outlet of the ram pump 3 via an oil circuit, the fourth electromagnetic inlet 902 is connected to the outlet of the turbine pump 2 via an oil circuit, and the third electromagnetic outlet 903 of the second electromagnetic directional valve 9 is connected to the ram nozzle control assembly 5 via an oil circuit. The low-pressure oil tank 1 is connected to the inlet of the turbine pump 2 and the inlet of the ram pump 3 via oil circuits. The low-pressure oil tank 1 is connected to the first electromagnetic outlet 803 of the first electromagnetic directional valve 8 and the fourth electromagnetic outlet 904 of the second electromagnetic directional valve 9 via oil circuits. A throttle nozzle 10 is installed on the oil circuit between the first electromagnetic outlet 803 and the low-pressure oil tank 1, and a throttle nozzle 10 is installed on the oil circuit between the fourth electromagnetic outlet 904 and the low-pressure oil tank 1.

[0041] like Figure 7As shown, when the outlets of turbopump 2 and ram pump 3 simultaneously supply oil at a pressure of 21 MPa, the electromagnetic induction valves of both the first electromagnetic reversing valve 8 and the second electromagnetic reversing valve 9 are de-energized. The first electromagnetic reversing valve 8 is in the first position, and the second electromagnetic reversing valve 9 is in the a-th position. The oil from the outlet of turbopump 2 flows through the second electromagnetic outlet 804 of the first electromagnetic reversing valve 8 to the turbine nozzle control assembly 4, and the oil from the outlet of turbopump 2 returns to the low-pressure oil tank 1 through the fourth electromagnetic outlet 904 of the second electromagnetic reversing valve 9. The oil from the outlet of ram pump 3 flows through the third electromagnetic outlet 903 of the second electromagnetic reversing valve 9 to the ram pump nozzle control assembly 5, and the oil from the outlet of ram pump 3 returns to the low-pressure oil tank 1 through the first electromagnetic outlet 803 of the first electromagnetic reversing valve 8.

[0042] like Figure 8 As shown, when the outlet oil supply pressure of turbopump 2 is no greater than 1 MPa and the outlet oil supply pressure of ram pump 3 is 21 MPa, the first solenoid directional valve 8 is energized and the second solenoid directional valve 9 is de-energized. The first solenoid directional valve 8 is in the second position and the second solenoid directional valve 9 is in the a-th position. At this time, the oil from the outlet of turbopump 2 returns to the low-pressure oil tank 1 through the first solenoid outlet 803 of the first solenoid directional valve 8 and the fourth solenoid outlet 904 of the second solenoid directional valve 9. The oil from the outlet of ram pump 3 flows to the turbine nozzle control component 4 through the second solenoid outlet 804 of the first solenoid directional valve 8 and to the ram nozzle control component 5 through the third solenoid outlet 903 of the second solenoid directional valve 9, thus achieving oil supply to both the turbine nozzle control component 4 and the ram nozzle control component 5.

[0043] like Figure 9 As shown, when the outlet oil supply pressure of turbopump 2 is 21 MPa and the outlet oil supply pressure of ram pump 3 is no greater than 1 MPa, the first solenoid directional valve 8 is de-energized and the second solenoid directional valve 9 is energized. The first solenoid directional valve 8 is in the first position and the second solenoid directional valve 9 is in the b-th position. At this time, the oil from the outlet of ram pump 3 returns to the low-pressure oil tank 1 through the first solenoid outlet 803 of the first solenoid directional valve 8 and the fourth solenoid outlet 904 of the second solenoid directional valve 9. The oil from the outlet of turbopump 2 flows to the turbine nozzle control component 4 through the second solenoid outlet 804 of the first solenoid directional valve 8, and flows to the ram nozzle control component 5 through the third solenoid outlet 903 of the second solenoid directional valve 9, thus achieving oil supply to both the turbine nozzle control component 4 and the ram nozzle control component 5.

[0044] like Figure 10As shown, when the outlet of the turbine pump and the outlet of the ram pump 3 are simultaneously supplied with oil at a pressure of 21 MPa, the solenoids of the first solenoid directional valve 8 and the second solenoid directional valve 9 are both energized. The first solenoid directional valve 8 is in the second position, and the second solenoid directional valve 9 is in the b-th position. One path of the oil from the outlet of the turbine pump 2 returns to the low-pressure oil tank 1 through the first solenoid outlet 803 of the first solenoid directional valve 8, and the other path of the oil from the outlet of the turbine pump 2 flows to the ram nozzle control assembly 5 through the third solenoid outlet 903 of the second solenoid directional valve 9. One path of the oil from the outlet of the ram pump 3 returns to the low-pressure oil tank 1 through the fourth solenoid outlet 904 of the second solenoid directional valve 9, and the other path of the oil from the outlet of the ram pump 3 flows to the turbine nozzle control assembly 4 through the second solenoid outlet 804 of the first solenoid directional valve 8.

Claims

1. A nozzle control oil supply device for a parallel turbo-ramjet combined engine, comprising a turbine nozzle control assembly (4), a ramjet nozzle control assembly (5), a turbopump (2) for supplying oil to the turbine nozzle control assembly (4), and a ramjet pump (3) for supplying oil to the ramjet nozzle control assembly (5), characterized in that: It also includes an oil circuit switching device, which includes a first reversing valve and a second reversing valve. The first reversing valve has a first inlet and a second inlet on the first inlet side of its valve body, and a first outlet and a second outlet on the first outlet side opposite to the first inlet side. The second reversing valve has a third inlet and a fourth inlet on the second inlet side of its valve body, and a third outlet and a fourth outlet on the second outlet side opposite to the second inlet side. The first inlet and the third inlet are connected to the outlet of the press pump (3) through an oil circuit, and the second inlet and the fourth inlet... The first reversing valve is connected to the outlet of the turbine pump (2) via an oil circuit, the second outlet of the first reversing valve is connected to the turbine nozzle control assembly (4) via an oil circuit, and the third outlet of the second reversing valve is connected to the ramjet nozzle control assembly (5) via an oil circuit. The system also includes a low-pressure oil tank (1) for supplying oil to the turbine pump (2) and the ramjet pump (3). The low-pressure oil tank (1) is connected to the inlet of the turbine pump (2) and the inlet of the ramjet pump (3) via oil circuits. The low-pressure oil tank (1) is connected to the first outlet of the first reversing valve and the fourth outlet of the second reversing valve via oil circuits.

2. The nozzle control oil supply device for a parallel turbo-ramjet combined engine according to claim 1, characterized in that: The first position of the first directional valve is such that the first inlet and the first outlet are connected and the second inlet and the second outlet are connected; the second position of the first directional valve is such that the first inlet and the second outlet are connected and the second inlet and the first outlet are connected; the a position of the second directional valve is such that the third inlet and the third outlet are connected and the fourth inlet and the fourth outlet are connected; the b position of the second directional valve is such that the third inlet and the fourth outlet are connected and the fourth inlet and the third outlet are connected.

3. The nozzle control oil supply device for a parallel turbo-ramjet combined engine according to claim 1 or 2, characterized in that: Both the first and second directional valves are pressure directional valves. The first directional valve has a first upper directional port at its top and a first lower directional port at its bottom. The second directional valve has a second upper directional port at its top and a second lower directional port at its bottom. The first and second upper directional ports are connected to the outlet of the press pump (3) via an oil circuit. The first and second lower directional ports are connected to the outlet of the turbine pump (2) via an oil circuit.

4. The nozzle control oil supply device for a parallel turbo-ramjet combined engine according to claim 1 or 2, characterized in that: Both the first and second directional valves are solenoid directional valves.

5. The nozzle control oil supply device for a parallel turbo-ramjet combined engine according to claim 1, characterized in that: A throttle nozzle (10) is provided on the oil line between the first outlet and the low-pressure oil tank (1), and a throttle nozzle (10) is provided on the oil line between the fourth outlet and the low-pressure oil tank (1).

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