Quantitative detection device for air leakage of ignition device of aero-engine

Abstract

The utility model discloses an aero-engine ignition device air leakage quantitative detection device which comprises a working mechanism, adjusting mechanisms and a lifting mechanism, the adjusting mechanisms are arranged on the two sides of the working mechanism, and the lifting mechanism is arranged at the bottoms of the working mechanism and the adjusting mechanisms; the working mechanism comprises a first sealing tank, one side of the first sealing tank is fixedly connected with an ignition device, one side of the first sealing tank is fixedly connected with a first barometer, and one side of the ignition device is fixedly connected with a second sealing tank. In the utility model, the internal volumes of the first sealing tank and the second sealing tank are known, the air pressure of the first sealing tank and the second sealing tank can be measured according to the first barometer and the second barometer, the theoretical value of the second sealing tank at the moment can be calculated according to an ideal gas state equation, and then the theoretical value is compared with the actual value measured by the second barometer; therefore, the current air leakage can be accurately calculated, and the problem that the air leakage cannot be measured and calculated is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation engines, in particular to a quantitative detection device for air leakage of an aviation engine ignition device. Background Art

[0002] The aircraft engine ignition system is an important component of the aircraft engine, used for engine starting or afterburner electric ignition. The ignition device is the core component of the ignition system, which converts the low-voltage DC / AC power transmitted from the ground or onboard into high-voltage pulse electricity, and transmits it to the ignition nozzle to generate high-energy electric sparks. In recent years, the aviation industry has developed rapidly, requiring aircraft engines with higher thrust-to-weight ratios. Therefore, when the energy is required to be constant or even higher, the aircraft engine must be smaller and lighter. As an important component of the aircraft engine, the ignition device is inevitably developing in the direction of miniaturization and lightweight.

[0003] After searching, the Chinese patent number CN105531466A discloses an ignition device for an aircraft engine including at least two spark plugs, the device comprising a power supply, a first channel for supplying power to a first spark plug, and a second channel (4) for supplying power to a second spark plug, the channels (3, 4) being connected to the power supply through a power distribution component (5) of the power supply, the power distribution component being controlled by a FADEC type control system, wherein the power distribution component (5) comprises a first circuit (6) and a second circuit (7), the first circuit being configured to alternately supply the first channel (3) or the second channel (4), the second circuit being used to simultaneously supply the first channel (3) and the second channel (4), the device being configured to use the first circuit (6) or the second circuit (7) during starting.

[0004] After searching, the Chinese patent number CN114671047A discloses an ignition test device for a multi-oil circuit igniter of an aircraft engine. The device controls the fuel mixing ratio by controlling the flow rate of each fuel output by the multi-oil circuit fuel supply system. The device can realize that the multi-oil circuit fuel supply system outputs any one of single-component fuel, two-component fuel and multi-component fuel to the igniter. The device can simulate the ignition test of single fuel, two-component fuel and even multi-component fuel. When the ignition performance test of different fuel igniters is required, there is no need to manually replace the fuel, which greatly improves the efficiency of the ignition test, and the ratio of the mixed fuel can be adjusted according to actual needs, which is very convenient to adjust. In addition, the low-temperature air cooled by the refrigeration system can be provided to the igniter for ignition test on the one hand, and can also cool the fuel provided by the multi-oil circuit fuel supply system on the other hand. There is no need to set up a separate fuel cooling system, which simplifies the system structure.

[0005] However, the existing air leakage detection device for the ignition device of an aircraft engine can only detect whether there is air leakage, but cannot quantitatively detect the amount of air leakage. Therefore, the research on the influence of air leakage on the ignition device and the ignition success rate of the aircraft engine under this influence has stagnated. In the face of the rapid development of aviation equipment and aircraft engines, the stability requirements of various aircraft components are getting higher and higher. The inability to detect the amount of air leakage will become a fatal factor in the development of future aircraft equipment. Based on this, the utility model designs a quantitative air leakage detection device for the ignition device of an aircraft engine to solve the above problem. Utility Model Content

[0006] The utility model aims to provide a quantitative detection device for air leakage of an aircraft engine ignition device, so as to solve the above-mentioned problem that the air leakage amount cannot be detected.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a quantitative detection device for air leakage of an aircraft engine ignition device, comprising a working mechanism, an adjusting mechanism and a lifting mechanism, wherein the adjusting mechanism is arranged on both sides of the working mechanism, and the lifting mechanism is arranged at the bottom of the working mechanism and the adjusting mechanism;

[0008] The working mechanism includes a first sealed tank, one side of which is fixedly connected to an ignition device, one side of which is fixedly connected to a first barometer, one side of the ignition device is fixedly connected to a second sealed tank, and one side of the second sealed tank is fixedly connected to a second barometer.

[0009] The internal volumes of the first sealed tank and the second sealed tank are known, and the air pressures of the first sealed tank and the second sealed tank can be measured by the first barometer and the second barometer. The volumes of the first sealed tank and the second sealed tank are Va and Vb, assuming that the temperature remains constant throughout the process, and the initial air pressure Pa1 of the first sealed tank and the air pressure Pa2 after t time can be measured by the first barometer, and the initial air pressure Pb1 of the second sealed tank and the air pressure Pb2 after t time can be measured by the second barometer, and then according to the ideal gas state equation:

[0010] PV=nRT

[0011] The theoretical value of the second sealed tank at this time is calculated, and then compared with the actual value measured by the second barometer to know the current leakage amount.

[0012] Preferably, the regulating mechanism includes an air pressure valve body, a dust cover is mounted on the top of the air pressure valve body, a first telescopic rod is fixedly connected to the bottom of the inner cavity of the air pressure valve body, a movable plate is fixedly connected to the top of the first telescopic rod, and the movable plate can move up and down in the inner cavity of the air pressure valve body.

[0013] Preferably, the outer ring of the first telescopic rod is sleeved with a first spring, the top of the first spring is fixedly connected to the bottom of the movable plate, and the bottom of the first spring is fixedly connected to the bottom of the inner cavity of the air pressure valve body.

[0014] The gas enters the inner cavity of the air pressure valve body and presses the movable plate downward. During the pressing process, the movable plate moves downward and presses the first telescopic rod and the first spring. At this time, the gas can enter the inner cavity of the first sealing tank from the cleaning pipe.

[0015] Preferably, a rotary valve body is fixedly connected to one side of the second barometer, a rotary valve core is rotatably connected to the inner cavity of the rotary valve body, a rotating shaft is fixedly connected to the top of the rotary valve core, a crank is fixedly connected to the top of the rotating shaft, and a through hole is opened in the inner cavity of the rotary valve core.

[0016] When the through hole of the rotary valve core is aligned with the outer tube body, the gas can move through the through hole, and turning the crank drives the rotating shaft and the rotary valve core to rotate in the inner cavity of the rotary valve body, so that the outer tube body is not aligned with the through hole position of the rotary valve core. At this time, the rotary valve body is in a closed state.

[0017] Preferably, a cleaning tube is fixedly connected between the air pressure valve body and the first sealing tank, one side of the cleaning tube is fixedly connected to a fixing plate, one side of the fixing plate is fixedly connected to a second telescopic rod, and one side of the second telescopic rod is rotatably connected to a turntable.

[0018] Preferably, a connecting plate is fixedly connected to one side of the turntable, a cleaning brush is fixedly connected to one side of the connecting plate, the connecting plate and the cleaning brush are distributed in multiple groups of circular arrays, the outer ring of the second telescopic rod is sleeved with a second spring, one side of the second spring is fixedly connected to the connecting plate, and the other side of the second spring is fixedly connected to the turntable.

[0019] When the gas enters the inner cavity of the cleaning tube, it will drive the turntable to rotate around the shaft, so that the connecting plate and the cleaning brush will rotate around the turntable. The cleaning brush will contact the inner wall of the cleaning tube, so the inner wall of the cleaning tube can be cleaned. When the gas flow is large, it will drive the turntable to move to the right, and at the same time squeeze the second telescopic rod and the second spring. At this time, the cleaning brush will clean the right side of the cleaning tube; when the gas flow is small, the second telescopic rod and the second spring that were squeezed will return to their original state. At this time, the cleaning brush will move to the left side of the cleaning tube for subsequent cleaning. According to the gas flow, the cleaning area of ​​the cleaning brush is automatically adjusted.

[0020] Preferably, the lifting mechanism includes a working plate, a base plate is provided at the bottom of the working plate, a motor seat is fixedly connected to the left side of the top of the base plate, a servo motor is provided in the inner cavity of the motor seat, a connecting seat is fixedly connected to the right side of the top of the base plate, a bidirectional screw rod is rotatably connected between the servo motor and the connecting seat, the outer ring of the bidirectional screw rod is threadedly connected to the first moving block, and the rotation of the bidirectional screw rod can realize the lifting and lowering of the working plate.

[0021] Preferably, a limiting rod is fixedly connected between the motor seat and the connecting seat, a rotating plate is hinged on the top of the first movable block, a second movable block is hinged on the top of the rotating plate, the second movable block is slidably connected to the bottom of the working plate, and a sliding groove is provided at the bottom of the working plate.

[0022] Preferably, a sliding block is fixedly connected to the top of the second moving block, and the sliding block is slidably connected in the inner cavity of the sliding groove.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] 1. In the utility model, through the cooperation of the first sealed can and the second sealed can, the internal volumes of the first sealed can and the second sealed can are known, and the air pressures of the first sealed can and the second sealed can can be measured according to the first barometer and the second barometer. According to the ideal gas state equation, the theoretical value of the second sealed can at this time is calculated, and then compared with the actual value measured by the second barometer, the current amount of leakage can be accurately calculated, avoiding the problem caused by the inability to measure and calculate the leakage.

[0025] 2. In the utility model, through the cooperation of the cleaning tube and the cleaning brush, when the gas enters the inner cavity of the cleaning tube, it will drive the turntable to rotate around the rotating shaft, so that the connecting plate and the cleaning brush rotate around the turntable, and the cleaning brush contacts the inner wall of the cleaning tube, so the inner wall of the cleaning tube can be cleaned. When the gas flow rate is large, it will drive the turntable to move to the right, and at the same time squeeze the second telescopic rod and the second spring. At this time, the cleaning brush will clean the right side of the cleaning tube; when the gas flow rate is small, the second telescopic rod and the second spring that were originally squeezed will return to their original state, and the cleaning brush will move to the left side of the cleaning tube for subsequent cleaning. According to the gas flow rate, the cleaning area of ​​the cleaning brush is automatically adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front-view three-dimensional structural schematic diagram of the utility model;

[0027] Figure 2 It is a three-dimensional structural diagram of the working mechanism of the utility model;

[0028] Figure 3This is a front perspective structural diagram of the working mechanism of the utility model;

[0029] Figure 4 This is a schematic diagram of the three-dimensional structure of the air pressure valve body of the utility model;

[0030] Figure 5 For the utility model Figure 4 The enlarged structural diagram at A in the middle;

[0031] Figure 6 This is a schematic diagram of the internal structure of the air pressure valve body of the utility model;

[0032] Figure 7 It is a schematic diagram of the three-dimensional structure of the rotary valve body of the utility model;

[0033] Figure 8 This is a schematic diagram of the internal structure of the rotary valve body of the utility model;

[0034] Fig. 9 It is a three-dimensional structural schematic diagram of the lifting mechanism of the utility model.

[0035] In the figure: 1, working mechanism; 2, adjusting mechanism; 3, lifting mechanism; 101, first sealed tank; 102, ignition device; 103, first barometer; 104, second sealed tank; 105, second barometer; 201, air pressure valve body; 202, dust cover; 203, first telescopic rod; 204, moving plate; 205, first spring; 206, rotary valve body; 207, rotary valve core; 208, rotating shaft; 209, crank; 210, through hole; 211, cleaning tube; 212, fixing plate; 213, second telescopic rod; 214, turntable; 215, connecting plate; 216, cleaning brush; 217, second spring; 301, working plate; 302, bottom plate; 303, motor seat; 304, servo motor; 305, connecting seat; 306, bidirectional screw rod; 307, first moving block; 308, limiting rod; 309, rotating plate; 310, second moving block; 311, slide groove; 312, slider. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] Embodiment 1;

[0038] See also Figure 1 - Fig. 9In an embodiment of the utility model, a quantitative detection device for air leakage of an aircraft engine ignition device comprises a working mechanism 1, an adjusting mechanism 2 and a lifting mechanism 3, wherein the adjusting mechanism 2 is arranged on both sides of the working mechanism 1, and the lifting mechanism 3 is arranged at the bottom of the working mechanism 1 and the adjusting mechanism 2;

[0039] The working mechanism 1 includes a first sealed tank 101, one side of the first sealed tank 101 is fixedly connected to an ignition device 102, one side of the first sealed tank 101 is fixedly connected to a first barometer 103, one side of the ignition device 102 is fixedly connected to a second sealed tank 104, and one side of the second sealed tank 104 is fixedly connected to a second barometer 105.

[0040] like Figure 4 As shown, the regulating mechanism 2 includes an air pressure valve body 201, a dust cover 202 is mounted on the top of the air pressure valve body 201, a first telescopic rod 203 is fixedly connected to the bottom of the inner cavity of the air pressure valve body 201, and a movable plate 204 is fixedly connected to the top of the first telescopic rod 203, and the movable plate 204 can move up and down in the inner cavity of the air pressure valve body 201.

[0041] like Figure 6 As shown, the outer ring of the first telescopic rod 203 is sleeved with a first spring 205 , the top of the first spring 205 is fixedly connected to the bottom of the moving plate 204 , and the bottom of the first spring 205 is fixedly connected to the bottom of the inner cavity of the air pressure valve body 201 .

[0042] like Figure 7 and Figure 8 As shown, a rotary valve body 206 is fixedly connected to one side of the second barometer 105, a rotary valve core 207 is rotatably connected in the inner cavity of the rotary valve body 206, a rotating shaft 208 is fixedly connected to the top of the rotary valve core 207, a crank 209 is fixedly connected to the top of the rotating shaft 208, and a through hole 210 is opened in the inner cavity of the rotary valve core 207.

[0043] The working principle of the embodiment of the utility model is: the internal volumes of the first sealed tank 101 and the second sealed tank 104 are known, and the air pressures of the first sealed tank 101 and the second sealed tank 104 can be measured according to the first barometer 103 and the second barometer 105. The gas in the first sealed tank 101 rises and reaches a preset value, and then passes through the ignition device 102, and the gas enters the inner cavity of the second sealed tank 104. Since the gas leakage of the ignition device 102 is small, a large amount of gas will not leak through the second sealed tank 104 in a short time, so it can be ignored during the detection process. The volumes of the first sealed tank 101 and the second sealed tank 104 are Va and Vb, assuming that the temperature remains constant throughout the process, and the initial air pressure Pa1 of the first sealed tank 101 and the air pressure Pa2 after t time can be measured according to the first barometer 103, and the initial air pressure Pb1 and the air pressure Pb2 after t time of the second sealed tank 104 can be measured according to the second barometer 105, and then the theoretical value of the second sealed tank 104 at this time is calculated according to the ideal gas state equation, and then compared with the actual value measured by the second barometer 105, the current amount of leakage can be known. When the through hole 210 of the rotary valve core 207 is aligned with the outer tube body, the gas can move through the through hole 210, and the crank 209 is turned to drive the shaft 208 and the rotary valve core 207 to rotate in the inner cavity of the rotary valve body 206, so that the outer tube body is not aligned with the through hole 210 position of the rotary valve core 207, and the rotary valve body 206 is in a closed state.

[0044] Embodiment 2;

[0045] See also Figure 1 - Fig. 9 In the embodiment of the utility model, a cleaning tube 211 is fixedly connected between the air pressure valve body 201 and the first sealing tank 101, a fixing plate 212 is fixedly connected to one side of the cleaning tube 211, a second telescopic rod 213 is fixedly connected to one side of the fixing plate 212, a turntable 214 is rotatably connected to one side of the second telescopic rod 213, a connecting plate 215 is fixedly connected to one side of the turntable 214, a cleaning brush 216 is fixedly connected to one side of the connecting plate 215, the connecting plate 215 and the cleaning brush 216 are distributed in multiple groups of circular arrays, the outer ring of the second telescopic rod 213 is sleeved with a second spring 217, one side of the second spring 217 is fixedly connected to the connecting plate 215, and the other side of the second spring 217 is fixedly connected to the turntable 214.

[0046] The working principle of the embodiment of the utility model is: when the gas enters the inner cavity of the cleaning tube 211, it will drive the turntable 214 to rotate around the rotating shaft 208, so that the connecting plate 215 and the cleaning brush 216 rotate around the turntable 214, and the cleaning brush 216 contacts the inner wall of the cleaning tube 211, so that the inner wall of the cleaning tube 211 can be cleaned. When the gas flow rate is large, it will drive the turntable 214 to move to the right, and at the same time squeeze the second telescopic rod 213 and the second spring 217, and the cleaning brush 216 will clean the right side area of ​​the cleaning tube 211; when the gas flow rate is small, the originally squeezed second telescopic rod 213 and the second spring 217 will return to their original state, and the cleaning brush 216 will move to the left side area of ​​the cleaning tube 211 for subsequent cleaning.

[0047] Embodiment 3;

[0048] See also Figure 1 - Fig. 9 In the embodiment of the utility model, the lifting mechanism 3 includes a working plate 301, a bottom plate 302 is arranged at the bottom of the working plate 301, a motor seat 303 is fixedly connected to the left side of the top of the bottom plate 302, a servo motor 304 is arranged in the inner cavity of the motor seat 303, a connecting seat 305 is fixedly connected to the right side of the top of the bottom plate 302, a bidirectional screw rod 306 is rotatably connected between the servo motor 304 and the connecting seat 305, a first moving block 307 is threadedly connected to the outer ring of the bidirectional screw rod 306, a limiting rod 308 is fixedly connected between the motor seat 303 and the connecting seat 305, a rotating plate 309 is hinged at the top of the first moving block 307, a second moving block 310 is hinged at the top of the rotating plate 309, the second moving block 310 is slidably connected to the bottom of the working plate 301, a sliding groove 311 is opened at the bottom of the working plate 301, a slider 312 is fixedly connected to the top of the second moving block 310, and the slider 312 is slidably connected in the inner cavity of the sliding groove 311.

[0049] The working principle of the embodiment of the utility model is: start the servo motor 304, drive the bidirectional screw rod 306 to rotate, thereby drive the first moving block 307 connected by thread to move. During the movement of the first moving block 307, it will drive the rotating plate 309 to fold or unfold, thereby driving the second moving block 310 on the top to move, and realize the raising or lowering of the position of the top working plate 301, thereby realizing the change of the position of the top working mechanism 1 and the adjusting mechanism 2.

[0050] Working principle: Open the air pressure valve body 201, connect the air inlet pipe to the top of the air pressure valve body 201, and the gas enters the inner cavity of the air pressure valve body 201, squeezing the movable plate 204 downward. During the squeezing process, the movable plate 204 will move downward, squeezing the first telescopic rod 203 and the first spring 205, and the gas can enter the inner cavity of the first sealed tank 101 from the cleaning tube 211. When the gas weakens, the originally compressed first telescopic rod 203 and the first spring 205 will return to their original state, squeezing the movable plate 204 upward, and playing the role of closing the air pressure valve body 201. The internal volumes of the first sealed tank 101 and the second sealed tank 104 are known, and the air pressure of the first sealed tank 101 and the second sealed tank 104 can be measured according to the first barometer 103 and the second barometer 105. The gas in the first sealed tank 101 rises to a preset value, then passes through the ignition device 102 and enters the inner cavity of the second sealed tank 104. Since the leakage of the ignition device 102 is small, a large amount of gas will not leak through the second sealed tank 104 in a short time, so it can be ignored during the detection process. The volume of the first sealed tank 101 and the second sealed tank 104 is V a and V b , assuming that the temperature remains constant throughout the process, and the initial air pressure P of the first sealed can 101 can be measured by the first barometer 103 a1 and the air pressure P after time t a2 , the initial air pressure P of the second sealed tank 104 is measured by the second barometer 105 b1 and the air pressure P after time t b2 , and then according to the ideal gas state equation:

[0051] PV=nRT

[0052] The theoretical value of the second sealed can 104 at this time is calculated and then compared with the actual value measured by the second barometer 105 to know the current amount of leakage.

[0053] When the gas enters the inner cavity of the cleaning tube 211, it will drive the turntable 214 to rotate around the rotating shaft 208, so that the connecting plate 215 and the cleaning brush 216 rotate around the turntable 214, and the cleaning brush 216 contacts the inner wall of the cleaning tube 211, so that the inner wall of the cleaning tube 211 can be cleaned. When the gas flow rate is large, it will drive the turntable 214 to move to the right, and at the same time squeeze the second telescopic rod 213 and the second spring 217, at this time the cleaning brush 216 will clean the right side area of ​​the cleaning tube 211; when the gas flow rate is small, the second telescopic rod 213 and the second spring 217 that were originally squeezed will return to their original state, and at this time the cleaning brush 216 will move to the left side area of ​​the cleaning tube 211 for subsequent cleaning. According to the gas flow rate, the area cleaned by the cleaning brush 216 is automatically adjusted. The gas enters the inner cavity of the second sealing tank 104 and can then enter the rotary valve body 206 for discharge. When the through hole 210 of the rotary valve core 207 is aligned with the outer tube body, the gas can move through the through hole 210, and the crank 209 is turned to drive the rotating shaft 208 and the rotary valve core 207 to rotate in the inner cavity of the rotary valve body 206, so that the outer tube body is not aligned with the through hole 210 of the rotary valve core 207. At this time, the rotary valve body 206 is in a closed state. Start the servo motor 304 to drive the bidirectional screw rod 306 to rotate, thereby driving the threaded first moving block 307 to move. During the movement of the first moving block 307, it will drive the rotating plate 309 to fold or unfold, thereby driving the second moving block 310 at the top to move, and realize the increase or decrease of the position of the top working plate 301, thereby realizing the change of the position of the top working mechanism 1 and the adjustment mechanism 2.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A quantitative detection device for air leakage of an aircraft engine ignition device, comprising a working mechanism (1), an adjusting mechanism (2) and a lifting mechanism (3), characterized in that: The adjusting mechanism (2) is arranged on both sides of the working mechanism (1), and the lifting mechanism (3) is arranged at the bottom of the working mechanism (1) and the adjusting mechanism (2); The working mechanism (1) comprises a first sealed tank (101), one side of the first sealed tank (101) is fixedly connected to an ignition device (102), one side of the first sealed tank (101) is fixedly connected to a first barometer (103), one side of the ignition device (102) is fixedly connected to a second sealed tank (104), and one side of the second sealed tank (104) is fixedly connected to a second barometer (105).

2. The device for quantitatively detecting air leakage of an aircraft engine ignition device according to claim 1, characterized in that: The regulating mechanism (2) comprises an air pressure valve body (201), the top of the air pressure valve body (201) is covered with a dust cover (202), the bottom of the inner cavity of the air pressure valve body (201) is fixedly connected to a first telescopic rod (203), the top of the first telescopic rod (203) is fixedly connected to a movable plate (204), and the movable plate (204) can move up and down in the inner cavity of the air pressure valve body (201).

3. The device for quantitatively detecting air leakage of an aircraft engine ignition device according to claim 2, characterized in that: The outer ring of the first telescopic rod (203) is sleeved with a first spring (205), the top of the first spring (205) is fixedly connected to the bottom of the movable plate (204), and the bottom of the first spring (205) is fixedly connected to the bottom of the inner cavity of the air pressure valve body (201).

4. The device for quantitatively detecting air leakage of an aircraft engine ignition device according to claim 1, characterized in that: A rotary valve body (206) is fixedly connected to one side of the second barometer (105), a rotary valve core (207) is rotatably connected in the inner cavity of the rotary valve body (206), a rotating shaft (208) is fixedly connected to the top of the rotary valve core (207), a crank (209) is fixedly connected to the top of the rotating shaft (208), and a through hole (210) is provided in the inner cavity of the rotary valve core (207).

5. The device for quantitatively detecting air leakage of an aircraft engine ignition device according to claim 2, characterized in that: A cleaning tube (211) is fixedly connected between the air pressure valve body (201) and the first sealed tank (101); a fixing plate (212) is fixedly connected to one side of the cleaning tube (211); a second telescopic rod (213) is fixedly connected to one side of the fixing plate (212); and a rotating disk (214) is rotatably connected to one side of the second telescopic rod (213).

6. The device for quantitatively detecting air leakage of an aircraft engine ignition device according to claim 5, characterized in that: A connecting plate (215) is fixedly connected to one side of the rotating disk (214), a cleaning brush (216) is fixedly connected to one side of the connecting plate (215), the connecting plate (215) and the cleaning brush (216) are distributed in a plurality of circular arrays, the outer ring of the second telescopic rod (213) is sleeved with a second spring (217), one side of the second spring (217) is fixedly connected to the connecting plate (215), and the other side of the second spring (217) is fixedly connected to the rotating disk (214).

7. The device for quantitatively detecting air leakage of an aircraft engine ignition device according to claim 1, characterized in that: The lifting mechanism (3) comprises a working plate (301), a bottom plate (302) is arranged at the bottom of the working plate (301), a motor seat (303) is fixedly connected to the left side of the top of the bottom plate (302), a servo motor (304) is arranged in the inner cavity of the motor seat (303), a connecting seat (305) is fixedly connected to the right side of the top of the bottom plate (302), a bidirectional screw rod (306) is rotatably connected between the servo motor (304) and the connecting seat (305), and the outer ring of the bidirectional screw rod (306) is threadedly connected to a first moving block (307).

8. The device for quantitatively detecting air leakage of an aircraft engine ignition device according to claim 7, characterized in that: A limiting rod (308) is fixedly connected between the motor seat (303) and the connecting seat (305); a rotating plate (309) is hinged on the top of the first moving block (307); a second moving block (310) is hinged on the top of the rotating plate (309); the second moving block (310) is slidably connected to the bottom of the working plate (301); and a sliding groove (311) is provided at the bottom of the working plate (301).

9. The device for quantitatively detecting air leakage of an aircraft engine ignition device according to claim 8, characterized in that: A sliding block (312) is fixedly connected to the top of the second moving block (310), and the sliding block (312) is slidably connected in the inner cavity of the sliding groove (311).

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