Measuring device and method for calibrating full-closed position of adjustable air bleed valve based on pressing force

Abstract

The invention provides a measuring device and method for calibrating the full-closed position of an adjustable air bleed valve based on pressing force, the measuring device for calibrating the full-closed position of the adjustable air bleed valve based on pressing force comprises a mounting mechanism and an adjusting assembly, and the mounting mechanism is detachably connected with an engine runner window main body; the adjusting assembly is mounted on the mounting mechanism and comprises an adjusting rod and a pressure sensor, the adjusting rod is used for moving towards or away from an adjustable air bleed valve pre-placed at the engine flow channel window, the pressure sensor is mounted on the adjusting rod, and the pressure sensor is used for adjusting the air bleed valve when the adjusting rod abuts against the adjustable air bleed valve to the fully-closed position. And the pressure value of the adjusting rod is measured. According to the measuring device for calibrating the full-closed position of the adjustable air bleed valve based on the pressing force, the installation deviation of the adjustable air bleed valve can be determined in time, and it is guaranteed that the difference of the adjustable air bleed valve at the full-closed position is minimum.

Description

Technical Field

[0001] The invention relates to the technical field of aero-engine assembly, and in particular to a measuring device and method for calibrating the fully closed position of an adjustable air release valve based on a pressing force. Background Art

[0002] Among the components of aircraft engines, adjustable bleed valve is an important component. Its main function is to discharge a part of the internal air when the aircraft engine speed is low, control the flow entering the high-pressure compressor, and improve the surge margin of the high-pressure compressor. The adjustable bleed valve is usually arranged between the middle casing support plates. The number is consistent with the number of support plates. The entire circle of bleed valves are driven to open or close synchronously by the actuator ring.

[0003] During the assembly of aircraft engines, the movement of the adjustable bleed valve needs to be calibrated to verify the opening angle, stroke and accuracy of the valve. Incorrect calibration angles may lead to flow deviations entering the inner body, and different opening angles of circumferential valves may lead to circumferential non-uniformity of the airflow entering the inner body, which will seriously affect the performance of aircraft engines. In the cruising state of the aircraft engine, the adjustable bleed valve needs to be kept fully closed at all times. At this time, the bleed valve and the flow channel should be smooth and without steps, otherwise it will affect the smooth passage of the airflow. These requirements put forward higher requirements for the calibration of the adjustable bleed valve, and the importance of the fully closed position as the calibration benchmark is self-evident.

[0004] The traditional solution is to drive the entire circle of the deflation valve through the actuator ring to keep it in the fully closed position, and to ensure that the positions of all valves are relatively uniform by fine-tuning the driven connecting rod. The inspection standard is usually the flow channel step difference, which is used as a benchmark to calibrate the valve angle. However, this method has the following disadvantages:

[0005] 1. The fully closed position of the adjustable bleed valve is usually sealed with a rubber strip. The elastic force of the rubber strip itself makes it difficult for the adjustable bleed valve to remain in the fully closed state.

[0006] Second, the elastic modulus of the rubber strip itself and the difference in installation position will cause the adjustable bleed valve to overcome inconsistent resistance in the fully closed position. The rubber strip with large compression force will be damaged prematurely, affecting the accuracy of the switch position of the adjustable bleed valve.

[0007] 3. When the adjustable bleed valve is in the fully closed position, the uneven resistance of the rubber strip will also act on its corresponding driven connecting rod, causing uneven circumferential stress on it, which may damage the stability of the mechanism.

[0008] Based on this, the inventor of the present application proposes a measuring device and method for calibrating the fully closed position of an adjustable vent valve based on the clamping force, in order to solve the above technical problems. Summary of the invention

[0009] The technical problem to be solved by the present invention is to overcome the defects of the prior art that the fully closed position of the adjustable bleed valve has large differences and is affected by many factors, and to provide a measuring device and method for calibrating the fully closed position of the adjustable bleed valve based on the clamping force.

[0010] The present invention solves the above technical problems through the following technical solutions:

[0011] The present invention provides a measuring device for calibrating the fully closed position of an adjustable deflation valve based on a pressing force, which is characterized in that it includes:

[0012] A mounting mechanism, detachably connected to the engine flow channel window body;

[0013] An adjusting component is installed on the mounting mechanism, and the adjusting component includes an adjusting rod and a pressure sensor. The adjusting rod is used to move toward or away from an adjustable bleed valve pre-placed at the engine flow channel window. The pressure sensor is installed on the adjusting rod. The pressure sensor is used to measure the pressure value applied to the adjusting rod when the adjusting rod presses the adjustable bleed valve to a fully closed position.

[0014] According to one embodiment of the present invention, the mounting mechanism comprises a mounting plate and at least one threaded connector;

[0015] At least one first mounting hole is formed on the mounting plate, and the threaded connector is passed through the first mounting hole and a second mounting hole formed on the engine flow channel window body, so as to detachably connect the mounting plate to the engine flow channel window body.

[0016] According to an embodiment of the present invention, the number of the threaded connectors is two, and the threaded connectors are disposed on two opposite sides of the mounting plate.

[0017] According to one embodiment of the present invention, the adjusting rod comprises a first rod body and a second rod body;

[0018] One end of the first rod body is connected to the mounting plate, and the other end is slidably connected to the second rod body, and the end of the second rod body is arranged toward the engine flow channel window.

[0019] According to an embodiment of the present invention, a sleeve is provided at one end of the first rod body away from the mounting plate, and the second rod body is sleeved in the sleeve and is rotationally matched with the sleeve thread.

[0020] According to an embodiment of the present invention, the first rod body comprises a first rod portion and a second rod portion, and the first rod portion and the second rod portion are arranged at an angle;

[0021] The axial direction of the second rod portion is arranged parallel to the plane of the engine flow channel window.

[0022] According to one embodiment of the present invention, the second rod body includes a screw rod, a connecting tube, and a push rod;

[0023] One end of the screw rod and the push rod are both inserted into the connecting tube, and the pressure sensor is located in the connecting tube and abuts against the ends of the screw rod and the push rod respectively;

[0024] One end of the screw rod away from the push rod is slidably matched with the first rod body thread, and one end of the push rod away from the screw rod extends toward the engine flow channel window.

[0025] According to an embodiment of the present invention, a handle is further provided at one end of the screw rod away from the push rod, and the handle is used to drive the screw rod to slide along the axial direction relative to the first rod body.

[0026] The present invention also provides a method for measuring the fully closed position of an adjustable deflation valve based on the clamping force calibration, which is achieved by using the above-mentioned measuring device for measuring the fully closed position of an adjustable deflation valve based on the clamping force calibration, and the method comprises:

[0027] Disconnect the connection between the adjustable air release valve and the connecting rod;

[0028] Install the mounting mechanism to the engine flow channel window body;

[0029] By adjusting the adjusting rod, the adjustable deflation valve is pressed to a fully closed state and the value of the pressure sensor at this time is recorded;

[0030] The pressure values ​​of all the adjustable bleed valves in the fully closed state are measured in turn to screen out abnormal adjustable bleed valves.

[0031] According to one embodiment of the present invention, after screening out abnormal adjustable deflation valves, the method further comprises:

[0032] Screen the installation status of the rotating shaft and sealing strip corresponding to the abnormal adjustable air bleed valve.

[0033] The positive and progressive effects of the present invention are:

[0034] The present invention is a measuring device for calibrating the fully closed position of an adjustable bleed valve based on a clamping force. A mounting mechanism is detachably arranged on the main structure of the engine flow channel window, which is convenient for disassembly and assembly and is beneficial for measuring the fully closed position of all adjustable bleed valves. When the adjusting rod presses the adjustable bleed valve from an initial state to a fully closed state, the pressure on the adjusting rod is measured by a pressure sensor. When the measured clamping force is greatly different from the preset value, it means that the corresponding adjustable bleed valve has an installation deviation, thereby ensuring that the difference of the adjustable bleed valve at the fully closed position is minimized. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0036] Figure 1 It is a schematic diagram of the measuring state of the measuring device for calibrating the fully closed position of the adjustable deflation valve based on the pressing force of the present invention;

[0037] Figure 2 It is a structural schematic diagram of the first rod body in the adjustment assembly of the present invention;

[0038] Figure 3 It is a schematic structural diagram of the second rod body in the adjustment assembly of the present invention;

[0039] Figure 4 It is a structural schematic diagram of the adjustable air release valve of the present invention;

[0040] Figure 5 The present invention is a flow chart of a method for measuring the fully closed position of an adjustable vent valve based on clamping force calibration.

[0041] 10. Mounting mechanism; 110. Mounting plate; 111. First mounting hole; 120. Threaded connector;

[0042] 20. Adjustment assembly; 210. Adjustment rod; 211. First rod body; 212. Second rod body; 213. Sleeve; 214. First rod portion; 215. Second rod portion; 216. Screw; 217. Connecting tube; 218. Push rod; 219. Handle; 220. Pressure sensor;

[0043] 30. Engine flow channel window body; 310. Second mounting hole;

[0044] 40. Adjustable air release valve; 410. Rotating shaft. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0046] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to preferred embodiments of the present invention, examples of which are shown in the accompanying drawings. Wherever possible, the same reference numerals will be used in all drawings to represent the same or similar parts. In addition, although the terms used in the present invention are selected from well-known and commonly used terms, some of the terms mentioned in the specification of the present invention may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description herein. In addition, it is required to understand the present invention not only by the actual terms used, but also by the meaning implied by each term.

[0047] Please refer to Figures 1 to 4 The present invention provides a measuring device for calibrating the fully closed position of an adjustable bleed valve based on the clamping force, including a mounting mechanism 10 and an adjusting assembly 20, wherein the mounting mechanism 10 is detachably connected to the engine flow channel window body 30. Because the engine flow channel window body 30 includes more than one window, an adjustable bleed valve 40 is arranged at each window. The measuring device provided by the present invention needs to measure the clamping force of each adjustable bleed valve 40 at the fully closed position, so it needs to be connected to the engine flow channel window body 30 in a detachable manner so that it can be reused. In order to improve efficiency, more than one measuring device can also be designed to participate in the measurement. The specific number of participants is not limited here and can be selected according to actual needs.

[0048] The adjusting assembly 20 is installed on the mounting mechanism 10, and the adjusting assembly 20 includes an adjusting rod 210 and a pressure sensor 220. The adjusting rod 210 is used to move toward or away from an adjustable bleed valve 40 pre-placed at the engine flow channel window. The pressure sensor 220 is installed on the adjusting rod 210. The pressure sensor 220 is used to measure the pressure value of the adjusting rod 210 when the adjusting rod 210 presses the adjustable bleed valve 40 to the fully closed position.

[0049] In the initial state, the adjustable bleed valve 40 is pre-installed at the engine flow channel window, and is moved to the fully closed position by the adjustment rod 210, and then the pressure sensor 220 is used to measure the pressing force at this time. If the pressing force is significantly different from the preset value, it means that there are installation problems with the corresponding rotating shaft 410, sealing strips and other installation structures at the adjustable bleed valve 40, which provides a reference for the installation and adjustment of the rotating shaft 410, sealing strips and other structures. Moreover, it is helpful to verify the opening angle stroke and accuracy of the adjustable bleed valve 40, which is helpful to reduce the inherent flow deviation and improve engine performance.

[0050] When the aircraft engine is in cruising mode, the adjustable bleed valve 40 needs to be in the fully closed position, and the adjustable bleed valve 40 and the flow channel are smooth and step-free, otherwise the smooth passage of the airflow will be affected. Because the closing force of each adjustable bleed valve 40 is certain in the traditional adjustment method, some adjustable bleed valves 40 are limited by the structure of the rotating shaft 410 or the sealing strip and cannot be fully closed, which makes the internal airflow uneven.

[0051] Moreover, after the shaft 410 and the sealing strip are installed, the measuring device for calibrating the fully closed position of the adjustable vent valve based on the clamping force of the present invention can be used to calibrate their installation status, providing a reference for the installation of the shaft 410 and the sealing strip.

[0052] In one embodiment, the mounting mechanism 10 includes a mounting plate 110 and at least one threaded connector 120; at least one first mounting hole 111 is provided on the mounting plate 110, and the threaded connector 120 is passed through the first mounting hole 111 and a second mounting hole 310 provided on the engine flow channel window body 30 to detachably connect the mounting plate 110 to the engine flow channel window body 30.

[0053] The threaded connector 120 may be a screw, a bolt, a screw rod, etc., which are not limited here. The present application adopts a screw rod and a locking nut to detachably connect the mounting plate 110 and the engine flow channel window body 30. When it is necessary to measure the pressing force of the adjustable air release valve 40 at the fully closed position, the measuring device of the present invention can be installed at the corresponding position. When the measurement is completed, only the threaded connector 120 needs to be removed, which is convenient for disassembly and assembly.

[0054] Specifically, there are two threaded connectors 120 , which are disposed on two opposite sides of the mounting plate 110 .

[0055] The mounting plate 110 is connected to the engine flow passage window body 30 through two threaded connectors 120, thereby improving the mounting stability between the mounting plate 110 and the engine flow passage window body. In some other embodiments, three or four threaded connectors 120 may also be used, and the number of threaded connectors 120 is only given as an example and is not intended to be limiting.

[0056] Please refer to Figures 1 to 3 In one embodiment, the adjustment rod 210 includes a first rod body 211 and a second rod body 212; one end of the first rod body 211 is connected to the mounting plate 110, and the other end is slidably connected to the second rod body 212, and the end of the second rod body 212 is arranged toward the engine flow channel window.

[0057] The first rod body 211 and the mounting plate 110 may be integrally arranged, or may be detachably connected by threads, which is not limited here.

[0058] The second rod 212 is slidably connected to the first rod 211 , so that the second rod 212 can slide relative to the first rod 211 to move toward or away from the engine flow channel window.

[0059] Specifically, a sleeve 213 is provided at one end of the first rod 211 away from the mounting plate 110 , and the second rod 212 is sleeved in the sleeve 213 and is threadably matched with the sleeve 213 .

[0060] The inner cavity of the sleeve 213 has an internal thread, and the outer peripheral side of the second rod body 212 is provided with an external thread matching the internal thread, so that the second rod body 212 moves along the sleeve 213 and can move toward or away from the adjustable deflation valve 40.

[0061] Moreover, the axial direction of the sleeve 213 is the direction of the sleeve 213 toward the adjustable air-release valve 40, and is also arranged perpendicular to the window plane corresponding to the adjustable air-release valve 40. Therefore, when the end of the second rod body 212 presses against the adjustable air-release valve 40, the force is more evenly applied, thereby avoiding additional resistance when the adjustable air-release valve 40 is closed due to uneven force, thereby affecting the measurement accuracy.

[0062] Please refer to Figure 3 In one embodiment, the first rod body 211 includes a first rod portion 214 and a second rod portion 215, and the first rod portion 214 and the second rod portion 215 are arranged at an angle; the axial direction of the second rod portion 215 is arranged parallel to the plane of the engine flow channel window.

[0063] In order to meet the installation requirements and allow the second rod body 212 to have enough space to move, the first rod body 211 is set to a first rod portion 214 and a second rod portion 215, and the first rod portion 214 and the second rod portion 215 are set at an angle, so that the second rod portion 215 is at a certain distance from the window, which is convenient for installing the second rod body 212 and meeting the movement requirements of the second rod body 212.

[0064] In one embodiment, the second rod body 212 includes a screw 216, a connecting tube 217, and a push rod 218. One end of the screw 216 and the push rod 218 are inserted into the connecting tube 217, and the pressure sensor 220 is located in the connecting tube 217 and abuts against the ends of the screw 216 and the push rod 218 respectively. One end of the screw 216 away from the push rod 218 is threadedly slidably matched with the first rod body 211, and one end of the push rod 218 away from the screw 216 extends toward the engine flow channel window.

[0065] The screw 216, the connecting tube 217 and the push rod 218 are coaxial, and one end of the screw 216 and the push rod 218 are inserted into the connecting tube 217 and abutted, and the pressure sensor 220 is located between the screw 216 and the push rod 218. In this way, when the screw 216 and the sleeve 213 slide together, the push rod 218 will gradually press the adjustable air release valve 40. While the adjustable air release valve 40 is subjected to force, it also gives a clamping force to the pressure sensor 220. When the screw 216 drives the adjustable air release valve 40 to the fully closed position, the clamping force at this time is recorded and compared with the preset value. When the difference is large, the rotating shaft 410 and the sealing strip of the adjustable air release valve 40 here can be inspected and repaired.

[0066] In order to facilitate the driving of the screw rod 216 , a handle 219 is further provided at one end of the screw rod 216 away from the top rod 218 . The handle 219 is used to drive the screw rod 216 to slide relative to the first rod body 211 along its axial direction.

[0067] The axial direction of the handle 219 is perpendicular to the second rod body 212 . The handle 219 is convenient for the staff to use. By rotating the handle 219 , the screw rod 216 can be driven to move relative to the first rod body 211 , so as to drive the end of the push rod 218 to press against the adjustable deflation valve 40 .

[0068] In summary, the present invention is a measuring device for calibrating the fully closed position of an adjustable bleed valve based on a clamping force. A mounting mechanism 10 is detachably arranged on the structure of the engine flow channel window body 30, which facilitates the disassembly and assembly of the measuring device and is beneficial for measuring the fully closed position of all adjustable bleed valves 40. When the adjusting rod 210 presses the adjustable bleed valve 40 from an initial state to a fully closed state, the pressure on the adjusting rod 210 is measured by the pressure sensor 220. When the measured clamping force is significantly different from the preset value, it means that the corresponding adjustable bleed valve 40 has an installation deviation, and the rotating shaft 410 and the sealing strip of the adjustable bleed valve 40 can be inspected and maintained to ensure that the difference of the adjustable bleed valve 40 in the fully closed position is minimized.

[0069] Moreover, the measuring method provided by the present invention can also be used to provide an installation reference for whether there is an installation deviation of the rotating shaft 410, whether there is abnormal jamming of the rotating shaft 410, whether there is a deviation in the installation position of the sealing strip, whether the sealing strip is in uniform contact with the adjustable air release valve 40, and whether there is a difference in the elastic modulus of the sealing strip.

[0070] Please refer to Figure 4 and Figure 5 The present invention also provides a method for measuring the fully closed position of an adjustable deflation valve based on a clamping force calibration, which is implemented by using the above-mentioned device for measuring the fully closed position of an adjustable deflation valve based on a clamping force calibration, and the method comprises:

[0071] S110, disconnect the connection between the adjustable air release valve and the connecting rod;

[0072] S120, installing the mounting mechanism to the engine flow channel window body;

[0073] S130, by adjusting the adjusting rod, pressing the adjustable deflation valve to a fully closed state and recording the value of the pressure sensor at this time;

[0074] S140, measuring the pressure values ​​of all the adjustable air release valves in the fully closed state in turn to screen out abnormal adjustable air release valves.

[0075] When it is necessary to measure the adjustable bleed valve, the mounting mechanism can be installed to the engine flow channel window body through a threaded connector, and then the adjusting rod is adjusted so that the adjusting rod presses against the adjustable bleed valve, thereby moving the adjustable bleed valve to the fully closed position, and then the pressure sensor is used to measure the clamping force on the adjusting rod at this time.

[0076] The fully closed position can be judged by the absence of a step between the bleed valve and the window. When the fully closed position is reached, the pressure sensor reading is recorded and defined as the fully closed clamping force of the adjustable bleed valve. By comparing the clamping force with the preset value, it can be determined whether it is an abnormal adjustable bleed valve.

[0077] After measuring all the adjustable bleed valves in sequence, the abnormal adjustable bleed valve can be found, and then the corresponding rotating shaft and sealing strip of the adjustable bleed valve can be inspected and repaired.

[0078] In some other embodiments, the measuring method provided by the present invention can also be used to provide an installation reference for whether there is an installation deviation of the rotating shaft, whether there is abnormal jamming of the rotating shaft, whether there is a deviation in the installation position of the sealing strip, whether the sealing strip is in uniform contact with the adjustable air release valve, and whether there is a difference in the elastic modulus of the sealing strip.

[0079] The present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or multiple times in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0080] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A measuring device for calibrating the fully closed position of an adjustable vent valve based on the clamping force, characterized in that: include: A mounting mechanism, detachably connected to the engine flow channel window body; An adjusting component is installed on the mounting mechanism, and the adjusting component includes an adjusting rod and a pressure sensor. The adjusting rod is used to move toward or away from an adjustable bleed valve pre-placed at the engine flow channel window. The pressure sensor is installed on the adjusting rod. The pressure sensor is used to measure the pressure value applied to the adjusting rod when the adjusting rod presses the adjustable bleed valve to a fully closed position.

2. The measuring device for calibrating the fully closed position of an adjustable vent valve based on the pressing force according to claim 1, characterized in that: The mounting mechanism includes a mounting plate and at least one threaded connector; At least one first mounting hole is formed on the mounting plate, and the threaded connector is passed through the first mounting hole and a second mounting hole formed on the engine flow channel window body, so as to detachably connect the mounting plate to the engine flow channel window body.

3. The measuring device for calibrating the fully closed position of an adjustable vent valve based on the pressing force according to claim 2, characterized in that: The number of the threaded connectors is two, and the threaded connectors are disposed on two opposite sides of the mounting plate.

4. The measuring device for calibrating the fully closed position of an adjustable vent valve based on the pressing force according to claim 2, characterized in that: The adjusting rod comprises a first rod body and a second rod body; One end of the first rod body is connected to the mounting plate, and the other end is slidably connected to the second rod body, and the end of the second rod body is arranged toward the engine flow channel window.

5. The measuring device for calibrating the fully closed position of an adjustable vent valve based on the pressing force according to claim 4, characterized in that: A sleeve is provided at one end of the first rod body away from the mounting plate, and the second rod body is sleeved in the sleeve and is rotationally matched with the sleeve thread.

6. The measuring device for calibrating the fully closed position of an adjustable vent valve based on the pressing force according to claim 5, characterized in that: The first rod body comprises a first rod portion and a second rod portion, and the first rod portion and the second rod portion are arranged at an angle; The axial direction of the second rod portion is arranged parallel to the plane of the engine flow channel window.

7. The measuring device for calibrating the fully closed position of an adjustable vent valve based on the pressing force according to claim 5, characterized in that: The second rod body includes a screw rod, a connecting tube, and a push rod; One end of the screw rod and the push rod are both inserted into the connecting tube, and the pressure sensor is located in the connecting tube and abuts against the ends of the screw rod and the push rod respectively; One end of the screw rod away from the push rod is slidably matched with the first rod body thread, and one end of the push rod away from the screw rod extends toward the engine flow channel window.

8. The measuring device for calibrating the fully closed position of an adjustable vent valve based on the pressing force according to claim 7, characterized in that: A handle is also provided at one end of the screw rod away from the push rod, and the handle is used to drive the screw rod to slide relative to the first rod body along its axial direction.

9. A method for measuring the fully closed position of an adjustable vent valve based on a clamping force calibration, implemented by using a measuring device for measuring the fully closed position of an adjustable vent valve based on a clamping force calibration as claimed in any one of claims 1 to 8, characterized in that: include: Disconnect the connection between the adjustable air release valve and the connecting rod; Install the mounting mechanism to the engine flow channel window body; By adjusting the adjusting rod, the adjustable deflation valve is pressed to a fully closed state and the value of the pressure sensor at this time is recorded; The pressure values ​​of all the adjustable bleed valves in the fully closed state are measured in turn to screen out abnormal adjustable bleed valves.

10. The method for measuring the fully closed position of an adjustable deflation valve based on clamping force calibration according to claim 9, characterized in that: After the abnormal adjustable deflation valve is screened out, the method further includes: Screen the installation status of the rotating shaft and sealing strip corresponding to the abnormal adjustable air bleed valve.

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