Airtightness testing device for aero-engine cylinder block

Abstract

The invention discloses an aero-engine cylinder airtightness testing device, and relates to the technical field of airtightness detection, the aero-engine cylinder airtightness testing device comprises a base, the upper end of the base is fixedly provided with a display panel, and the upper end of the base is slidably provided with a support plate at one side of the display panel; according to the air tightness testing device for the aero-engine cylinder body, the positioning rod is used for limiting the push rod, so that when the sealing block moves, the whole body is kept stable, and the sliding rod and the sliding groove are matched to drive the sealing block to get close to the middle or expand to the outside. When the sealing blocks draw close to the middle, the outer surface of the engine cylinder block can be clamped, and meanwhile, rubber rings are placed at the ends of the sealing blocks, so that the sealing blocks are matched to seal the outer surface of the engine cylinder block. And when the rubber ring expands outwards, the rubber ring is separated from the outer surface of the engine cylinder body, so that the engine cylinder body is convenient to take.

Description

Technical Field

[0001] The present invention relates to airtightness detection technology, and particularly to an airtightness test device for an aero-engine cylinder block. Background Art

[0002] Before assembly, the engine cylinder block needs to be tested for airtightness performance. In the industry, an air inlet and outlet side sealing and inflating docking device for the engine cylinder block is usually used to dock the engine cylinder block with the gas source. However, the existing air inlet and outlet side sealing and inflating docking device for the engine cylinder block has defects. The air inlet and outlet side sealing and inflating docking device for the engine cylinder block can only meet the engine cylinder block of one model. For different engine cylinder blocks, either the air inlet and outlet side sealing and inflating docking device for the engine cylinder block needs to be replaced, or the docking device needs to be moved and positioned to be compatible with the engine cylinder blocks of different models. With the advancement of industrialization, the application of engines is becoming more and more extensive. The engine cylinder block is essential in an engine, and most of the engine cylinder blocks need to be tested for airtightness after processing.

[0003] In the Chinese invention patent with the publication number CN109531494A, an air inlet and outlet side sealing and inflating docking device for an engine cylinder block is disclosed. The air inlet and outlet side sealing and inflating docking device for the engine cylinder block includes a frame bottom plate and a sliding bottom plate. A displacement driving part, a swing driving part, a ventilation plate and a sealing docking mechanism are arranged in the sliding bottom plate. The ventilation plate is driven by the displacement driving part to approach or move away from the sealing docking mechanism, and the sealing docking mechanism is driven by the swing driving part to rotate, so that the gas input end in the sealing docking mechanism is connected with the ventilation plate, and the gas output end in the sealing docking mechanism is connected with the engine cylinder block. The air inlet and outlet side sealing and inflating docking device for the engine cylinder block of the present invention can adapt to the docking of engine cylinder blocks of different models. By rotating the sealing docking mechanism through the swing driving part, a position suitable for the docking of the sealing docking mechanism with the ventilation plate and the engine cylinder block can be found, and thus the engine cylinder block can be inflated through the ventilation plate and the sealing docking mechanism. The air inlet and outlet side sealing and inflating docking device for the engine cylinder block of the present invention can adapt to engine cylinder blocks of multiple models, reduce the cost of cylinder block airtightness testing, and at the same time can also reduce the floor space.

[0004] When the existing engine cylinder block is tested for airtightness, it is mostly manually docked, resulting in a long docking time and poor docking accuracy, which is likely to affect the airtightness detection accuracy of the engine. At the same time, during the detection process, there may be poor sealing or air leakage at the connection part, which may lead to inaccurate test results. Therefore, an airtightness test device for an aero-engine cylinder block has been developed. Summary of the Invention

[0005] The purpose of the present invention is to provide an airtightness test device for an aero-engine cylinder block to solve the above deficiencies in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solution: An airtightness testing device for an aero-engine cylinder block, including a base, on the upper end of which a display board is fixedly installed, and at the same time, a support plate is slidably installed on the upper end of the base and on one side of the display board; A docking component, which is assembled on the support plate, and through which the detection component is accurately extended into the engine cylinder block; A protection component, which is assembled on the support plate and on one side of the docking component, and further limits the engine cylinder block through the protection component; Among them, the docking component includes a telescopic cylinder slidably connected to the support plate, at the end of which a bottom plate is fixedly installed, at the end of the bottom plate away from the telescopic cylinder, a plurality of positioning rods are fixedly installed, and the plurality of positioning rods are evenly distributed at the end of the bottom plate. At the same time, a push rod is rotatably installed on the outer surface of the positioning rod, and a sealing block is rotatably installed at the end of the push rod; A turntable is rotatably installed at the lower end of the bottom plate, a chute corresponding to the positioning rod is opened at the end of the turntable, a sliding rod is slidably installed on the inner wall of the chute, and at the same time, the end of the sliding rod is rotatably connected to the end of the sealing block, and a ring is fixedly installed on the outer surface of the turntable.

[0007] As a further optimized solution of the present invention, a guiding groove is opened on one side of the sealing block, the inner wall of the guiding groove is slidably connected to the outer surface of the adjacent sealing block, and the plurality of sealing blocks are arranged in a ring around the center.

[0008] As a further optimized solution of the present invention, a fixing plate is fixedly installed on the inner wall of the telescopic cylinder, a driving member is fixedly installed at the end of the fixing plate, and a screw rod is fixedly installed at the output end of the driving member.

[0009] As a further optimized solution of the present invention, a plurality of connecting blocks are fixedly installed on the outer surface of the driving member, and the plurality of connecting blocks are evenly distributed on the outer surface of the driving member. At the same time, a movable rod is rotatably installed at the end of the connecting block, and an extrusion block is rotatably installed at the end of the movable rod, and the outer surface of the extrusion block is attached to the inner wall of the engine cylinder block.

[0010] As a further optimized solution of the present invention, a movable block is rotatably installed on the outer surface of the screw rod, a protection rod corresponding to the movable rod is rotatably installed on the outer surface of the movable block, and the end of the protection rod is rotatably connected to the outer surface of the movable rod.

[0011] As a further optimization scheme of the present invention, the protection component includes a fixed block slidably connected to the support plate. A connecting plate is fixedly installed at the end of the fixed block, and a protection block is fixedly installed at the end of the connecting plate at the same time.

[0012] As a further optimization scheme of the present invention, a power component is fixedly installed on the inner wall of the fixed block. The output end of the power component penetrates and extends into the inner cavity of the protection block. A power rod is fixedly installed at the output end of the power component, and the end of the power rod is conical.

[0013] As a further optimization scheme of the present invention, a plurality of through holes are formed on the outer surface of the protection block, and the plurality of through holes are evenly distributed on the outer surface of the protection block. At the same time, a driving rod is slidably installed on the inner wall of the through hole, and the end of the driving rod is attached to the outer surface of the power rod.

[0014] As a further optimization scheme of the present invention, a positioning block corresponding to the driving rod is fixedly installed on the outer surface of the protection block. A clamping block is rotatably installed at the end of the positioning block, and the outer surface of the end of the clamping block is attached to the end of the driving rod.

[0015] As a further optimization scheme of the present invention, a slot hole is formed on the outer surface of the protection block and on one side of the positioning block. An elastic component is fixedly installed on the inner wall of the slot hole, and a reset block is fixedly installed at the end of the elastic component at the same time; The outer surface of the reset block is slidably connected to the inner wall of the slot hole, and the end of the reset block is attached to the outer surface of the clamping block.

[0016] Compared with the prior art, an airtightness testing device for an aeroengine cylinder block provided by the present invention has the following beneficial effects: 1. The positioning rod is used to limit the push rod, so that when the sealing block moves, the whole remains stable, and the sealing block is driven to move closer to the middle or expand outwards in cooperation with the sliding rod and the sliding groove. When moving closer to the middle, the outer surface of the engine cylinder block can be clamped, and rubber rings are placed at the ends of multiple sealing blocks, so that the outer surface of the engine cylinder block can be sealed in cooperation with the sealing block. When expanding outwards, the rubber ring is separated from the outer surface of the engine cylinder block, which is convenient for taking the engine cylinder block; 2. When the driving rod moves, it drives the clamping block to rotate around the end of the positioning block, and the end of the clamping block further limits the outer surface of the engine cylinder block. The outer surface of the clamping block is provided with anti-slip components such as rubber, which makes the whole engine cylinder block remain stable in cooperation with the protection block. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other accompanying drawings can also be obtained based on these drawings.

[0018] Figure 1 Schematic diagram of the overall structure provided by the embodiment of the present invention; Figure 2 Schematic diagram of the docking component structure provided by the embodiment of the present invention; Figure 3 First cross-sectional view of the internal structure of the docking component provided by the embodiment of the present invention; Figure 4 Second cross-sectional view of the internal structure of the docking component provided by the embodiment of the present invention; Figure 5 First cross-sectional view of the internal structure of the bottom plate provided by the embodiment of the present invention; Figure 6 Second cross-sectional view of the internal structure of the bottom plate provided by the embodiment of the present invention; Figure 7 Schematic diagram of the protection component structure provided by the embodiment of the present invention; Figure 8 Cross-sectional view of the internal structure of the protection component provided by the embodiment of the present invention; Figure 9 Exploded view of the protection component structure provided by the embodiment of the present invention.

[0019] Explanation of reference numerals: 1, base; 2, docking component; 3, protection component; 11, display board; 12, support board; 21, telescopic cylinder; 22, fixing plate; 23, driving member; 231, screw rod; 24, connecting block; 241, movable rod; 242, extrusion block; 25, protection rod; 26, movable block; 27, bottom plate; 28, positioning rod; 281, push rod; 282, sealing block; 283, guiding groove; 29, turntable; 291, sliding groove; 292, sliding rod; 293, ring; 31, fixing block; 32, connecting plate; 33, power member; 34, power rod; 341, driving rod; 35, protection block; 351, through hole; 36, slot hole; 361, elastic member; 37, reset block; 38, positioning block; 39, clamping block. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] Embodiment: Please refer to Figure 1 - Figure 9 , an airtightness test device for an aero-engine cylinder block, comprising a base 1. A display board 11 is fixedly installed at the upper end of the base 1. At the same time, a support board 12 is slidably installed on the upper end of the base 1 and on one side of the display board 11.

[0023] In this solution, the display board 11 is used to display various data during the detection of the engine cylinder block. At the same time, telescopic components such as electric telescopic rods are provided on the inner wall of the base 1 and are connected to an external control device. The output end of the electric telescopic rod is connected to the end of the support board 12, so as to adjust the position of the support board 12 to make it suitable for the detection scenario.

[0024] Furthermore, a docking assembly 2 is assembled on the support board 12. Through the docking assembly 2, the detection assembly is accurately extended into the engine cylinder block. Among them, the docking assembly 2 includes a telescopic cylinder 21 slidably connected to the support board 12. A bottom plate 27 is fixedly installed at the end of the telescopic cylinder 21. A plurality of positioning rods 28 are fixedly installed at one end of the bottom plate 27 away from the telescopic cylinder 21. The plurality of positioning rods 28 are evenly distributed at the end of the bottom plate 27. At the same time, a push rod 281 is rotatably installed on the outer surface of the positioning rod 28, and a sealing block 282 is rotatably installed at the end of the push rod 281.

[0025] In this embodiment, equipment with telescopic functions such as an electric telescopic rod is fixedly installed on the inner wall of the support plate 12 and is connected to an external control device. At the same time, the output end of the electric telescopic rod is attached to the outer surface of the telescopic cylinder 21, so that the telescopic cylinder 21 can be adjusted left and right to be applicable to different scenarios.

[0026] The positioning rod 28 is used to limit the push rod 281, so that when the sealing block 282 moves, the whole remains stable, and it cooperates with the sliding rod 292 and the sliding groove 291 to drive the sealing block 282 to move closer to the middle or expand outwards.

[0027] When moving closer to the middle, it can be clamped to the outer surface of the engine cylinder block. At the same time, rubber rings are provided at the ends of multiple sealing blocks 282, so that the outer surface of the engine cylinder block can be sealed in cooperation with the sealing blocks 282. When expanding outwards, the rubber ring is separated from the outer surface of the engine cylinder block, which is convenient for taking the engine cylinder block.

[0028] Further, a turntable 29 is rotatably installed at the lower end of the bottom plate 27. A sliding groove 291 corresponding to the positioning rod 28 is opened at the end of the turntable 29. The sliding groove 291 runs through the position of the turntable 29 far from the center and is inclined; a sliding rod 292 is slidably installed on the inner wall of the sliding groove 291, and at the same time, the end of the sliding rod 292 is rotatably connected to the end of the sealing block 282. A ring 293 is fixedly installed on the outer surface of the turntable 29.

[0029] Specifically, when the ring 293 rotates, the turntable 29 connected to it rotates synchronously. Since the outer surface of the sliding rod 292 is slidably connected to the inner wall of the sliding groove 291, when the turntable 29 rotates, the sliding rod 292 is driven to move in cooperation with the sliding groove 291. At the same time, the end of the sliding rod 292 is rotatably connected to the end of the sealing block 282, so that the sealing block 282 moves closer to the middle or expands outwards.

[0030] The outer surface of the ring 293 can be connected to the output end of the motor to provide power for the ring 293 to rotate.

[0031] Further, a guiding groove 283 is opened on one side of the sealing block 282. The inner wall of the guiding groove 283 is slidably connected to the outer surface of the adjacent sealing block 282, and multiple groups of sealing blocks 282 are arranged in a ring around the center.

[0032] Specifically, components with sealing functions such as rubber are provided on the inner wall of the guiding groove 283, so that when the sealing block 282 moves, the adjacent two sealing blocks 282 remain in a sealed state.

[0033] Furthermore, a fixed plate 22 is fixedly installed on the inner wall of the telescopic cylinder 21. A driving member 23 is fixedly installed at the end of the fixed plate 22, and a screw rod 231 is fixedly installed at the output end of the driving member 23.

[0034] Specifically, the driving member 23 is a device with power output such as a motor, and is connected to an external control device. At the same time, the driving member 23 is fixed through the fixed plate 22, so that the driving member 23 is located at the middle position of the inner cavity of the telescopic cylinder 21. When the driving member 23 is started, the screw rod 231 arranged at its output end is synchronously driven to rotate.

[0035] Furthermore, a plurality of connecting blocks 24 are fixedly installed on the outer surface of the driving member 23, and the plurality of connecting blocks 24 are evenly distributed on the outer surface of the driving member 23. At the same time, a movable rod 241 is rotatably installed at the end of the connecting block 24, and a pressing block 242 is rotatably installed at the end of the movable rod 241. The outer surface of the pressing block 242 is attached to the inner wall of the engine cylinder block.

[0036] Specifically, when the movable rod 241 is forced to move, it rotates around the end of the connecting block 24, so that the pressing block 242 rotatably installed on the movable rod 241 expands outwards and adheres to the inner wall of the engine cylinder block, further strengthening the limitation on the engine cylinder block and ensuring the stability of the seal.

[0037] Furthermore, a movable block 26 is rotatably installed on the outer surface of the screw rod 231. A protective rod 25 corresponding to the movable rod 241 is rotatably installed on the outer surface of the movable block 26, and the end of the protective rod 25 is rotatably connected to the outer surface of the movable rod 241.

[0038] Specifically, when the screw rod 231 rotates, the movable block 26 rotatably installed on its outer surface is synchronously driven to move left and right. A protective rod 25 is rotatably installed on the outer surface of the movable block 26, and the end of the protective rod 25 is rotatably connected to the outer surface of the movable rod 241. Furthermore, the protective rod 25 provides power for the movable rod 241 to ensure the stability of the movable rod 241.

[0039] Furthermore, a protective component 3 is assembled on the support plate 12 and is located on one side of the docking component 2. The engine cylinder block is further limited by the protective component 3; the protective component 3 includes a fixed block 31 slidably connected to the support plate 12. A connecting plate 32 is fixedly installed at the end of the fixed block 31, and a protective block 35 is fixedly installed at the end of the connecting plate 32 at the same time.

[0040] In this embodiment, a telescopic device such as an electric telescopic rod is arranged on the inner wall of the support plate 12 and is connected to an external control device. The fixed block 31 is driven to move through the electric telescopic rod, so that it is applicable to different scenarios.

[0041] At the end of the protective block 35, there are anti-slip components such as rubber, so that when the protective block 35 contacts the outer surface of the engine block, the overall stability of the engine block is maintained, facilitating subsequent docking.

[0042] Furthermore, a power component 33 is fixedly installed on the inner wall of the fixed block 31. The output end of the power component 33 penetrates and extends into the inner cavity of the protective block 35. A power rod 34 is fixedly installed at the output end of the power component 33, and the end of the power rod 34 is conical.

[0043] Multiple groups of through holes 351 are formed on the outer surface of the protective block 35, and the multiple groups of through holes 351 are evenly distributed on the outer surface of the protective block 35. At the same time, a driving rod 341 is slidably installed on the inner wall of the through hole 351, and the end of the driving rod 341 is attached to the outer surface of the power rod 34.

[0044] Specifically, the power component 33 is a device with power output such as an electric telescopic rod and is connected to an external control device. At the same time, when the power component 33 is started, the power rod 34 arranged at its output end is synchronously driven to move.

[0045] When the power rod 34 moves, since the end of the power rod 34 is conical, the driving rod 341 attached to its outer surface is further pushed to move. Among them, the driving rod 341 slides along the inner wall of the through hole 351 to ensure the stability of the driving rod 341.

[0046] Furthermore, a positioning block 38 corresponding to the driving rod 341 is fixedly installed on the outer surface of the protective block 35. A clamping block 39 is rotatably installed at the end of the positioning block 38, and the outer surface of the end of the clamping block 39 is attached to the end of the driving rod 341.

[0047] Specifically, when the driving rod 341 moves, it drives the clamping block 39 to rotate around the end of the positioning block 38, and the end of the clamping block 39 further limits the outer surface of the engine block. The outer surface of the clamping block 39 is provided with anti-slip components such as rubber, which cooperate with the protective block 35 to keep the overall engine block stable.

[0048] Furthermore, a slot hole 36 is formed on the outer surface of the protective block 35 and on one side of the positioning block 38. An elastic component 361 is fixedly installed on the inner wall of the slot hole 36. At the same time, a reset block 37 is fixedly installed at the end of the elastic component 361; the outer surface of the reset block 37 is slidably connected to the inner wall of the slot hole 36, and the end of the reset block 37 is attached to the outer surface of the clamping block 39.

[0049] Specifically, the elastic member 361 is an elastic component such as a spring. By connecting the elastic member 361 to the reset block 37, when the clamping blocks 39 move closer to each other, the reset block 37 is squeezed. When the driving rod 341 contracts, the elastic member 361 is cooperated to drive the clamping blocks 39 to rotate around the positioning block 38 and return to the initial position, which is convenient for subsequent use.

[0050] The control device can select a single-chip microcomputer as the control terminal. In this embodiment, the single-chip microcomputer is a typical embedded microcontroller (Micro controller Unit), which is composed of an arithmetic unit, a controller, a memory, input and output devices, etc., and is equivalent to a miniature computer. Compared with the general-purpose microprocessor applied in personal computers, it emphasizes more on self-supply (without external hardware) and cost savings. Its greatest advantage is its small size, which can be placed inside the instrument, but its storage capacity is small, the input and output interfaces are simple, and the function consumption is low.

[0051] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. An aircraft engine cylinder air tightness test device, characterized in that: It comprises a base (1), a display panel (11) being fixedly mounted on the upper end of the base (1), and a support plate (12) being slidably mounted on the upper end of the base (1) and located on one side of the display panel (11); A docking assembly (2) mounted on the support plate (12), through which the detection assembly is accurately extended to the interior of the engine cylinder body; A protection component (3) mounted on the support plate (12) and located on one side of the docking component (2), the engine cylinder body being further limited by the protection component (3); The docking assembly (2) comprises a telescopic cylinder (21) slidably connected to the support plate (12); a bottom plate (27) is fixedly mounted on the end of the telescopic cylinder (21); a plurality of groups of positioning rods (28) are fixedly mounted on one end of the bottom plate (27) away from the telescopic cylinder (21); and the plurality of groups of positioning rods (28) are evenly distributed at the end of the bottom plate (27); a push rod (281) is rotatably mounted on the outer surface of the positioning rod (28); and a sealing block (282) is rotatably mounted on the end of the push rod (281); A turntable (29) is rotatably mounted on the lower end of the bottom plate (27); a slide groove (291) corresponding to the positioning rod (28) is provided at the end of the turntable (29); a slide rod (292) is slidably mounted on the inner wall of the slide groove (291); and the end of the slide rod (292) is rotatably connected to the end of the sealing block (282); and a circular ring (293) is fixedly mounted on the outer surface of the turntable (29).

2. The aircraft engine cylinder air tightness test device according to claim 1, characterized in that: A guide groove (283) is provided on one side of the sealing block (282), and the inner wall of the guide groove (283) is slidably connected to the outer surface of an adjacent sealing block (282). At the same time, multiple groups of sealing blocks (282) are arranged in a ring shape around the center.

3. The device for testing the air tightness of an aircraft engine cylinder according to claim 2, characterized in that: A fixing plate (22) is fixedly mounted on the inner wall of the telescopic cylinder (21), a driving member (23) is fixedly mounted on the end of the fixing plate (22), and a screw rod (231) is fixedly mounted on the output end of the driving member (23).

4. The device for testing the air tightness of an aircraft engine cylinder according to claim 3, characterized in that: A plurality of groups of connection blocks (24) are fixedly mounted on the outer surface of the driving member (23), and the plurality of groups of connection blocks (24) are evenly distributed on the outer surface of the driving member (23); a movable rod (241) is rotatably mounted on the end of the connection block (24), and an extrusion block (242) is rotatably mounted on the end of the movable rod (241); the outer surface of the extrusion block (242) is in contact with the inner wall of the engine cylinder body.

5. The device for testing the air tightness of an aircraft engine cylinder according to claim 4, characterized in that: A movable block (26) is rotatably mounted on the outer surface of the screw rod (231), a protective rod (25) corresponding to the movable rod (241) is rotatably mounted on the outer surface of the movable block (26), and an end of the protective rod (25) is rotatably connected to the outer surface of the movable rod (241).

6. The aircraft engine cylinder air tightness test device according to claim 1, characterized in that: The protection assembly (3) comprises a fixed block (31) slidably connected to the support plate (12), a connecting plate (32) being fixedly mounted on the end of the fixed block (31), and a protection block (35) being fixedly mounted on the end of the connecting plate (32).

7. The aircraft engine cylinder air tightness testing device according to claim 6, characterized in that: A power piece (33) is fixedly mounted on the inner wall of the fixed block (31); an output end of the power piece (33) penetrates and extends to the inner cavity of the protective block (35); a power rod (34) is fixedly mounted on the output end of the power piece (33); and an end of the power rod (34) is tapered.

8. The device for testing the air tightness of an aircraft engine cylinder according to claim 7, characterized in that: The outer surface of the protection block (35) is provided with a plurality of groups of through holes (351), and the plurality of groups of through holes (351) are evenly distributed on the outer surface of the protection block (35), and a driving rod (341) is slidably mounted on the inner wall of the through hole (351), and the end of the driving rod (341) is in contact with the outer surface of the power rod (34).

9. The aircraft engine cylinder air tightness test device according to claim 8, characterized in that: A positioning block (38) corresponding to the driving rod (341) is fixedly mounted on the outer surface of the protection block (35); a clamping block (39) is rotatably mounted on the end of the positioning block (38); and the outer surface of the end of the clamping block (39) is in contact with the end of the driving rod (341).

10. The aircraft engine cylinder air tightness test device according to claim 9, characterized in that: A slot (36) is provided on the outer surface of the protection block (35) and on one side of the positioning block (38); an elastic member (361) is fixedly mounted on the inner wall of the slot (36); and a reset block (37) is fixedly mounted on the end of the elastic member (361); The outer surface of the reset block (37) is slidably connected to the inner wall of the slot hole (36), and the end of the reset block (37) is in contact with the outer surface of the clamping block (39).

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