Turbocharger housing air tightness testing equipment

Abstract

The present invention relates to the technical field of turbocharger testing, and discloses a turbocharger housing air tightness testing device, comprising a body, a video recording device mounted on the body, a water tank fixed on the body, a partition fixed inside the water tank, a sliding opening formed on the side of the water tank, the sliding opening being located below the partition, a fixing frame fixed on the body, a cylinder mounted on the body, a pressing member disposed below the fixing frame, a positioning member disposed above the water tank, the water tank being made of a transparent material and disposed directly opposite the video recording device. The present invention achieves dewatering of the turbocharger housing after testing, avoiding the need for an additional dewatering process, and saving time and cost.

Description

Technical Field

[0001] The present invention relates to the technical field of turbocharger detection, in particular to a turbocharger housing air tightness detection device. Background Art

[0002] Turbocharger housing air tightness testing equipment is a special equipment used to test the sealing performance of turbocharger housing.

[0003] After searching, the Chinese patent with publication number CN107525636A discloses a device for detecting the air tightness of the cooling chamber of the intermediate body of a turbocharger, comprising a frame, a mounting plate provided on the frame, a linear guide rail provided on the mounting plate, a tray moving along the linear guide rail provided on the linear guide rail, an active positioning mechanism and an auxiliary positioning mechanism provided at both ends of the linear guide rail, a sealing mechanism cooperating with the water outlet of the intermediate body provided on the side of the tray, the active positioning mechanism comprising a positioning cylinder, the positioning cylinder being provided with an active positioning block driven by the positioning cylinder to move along the linear guide rail, the active positioning block being provided with a sealing tube facing the water inlet of the intermediate body on the side facing the tray, the above scheme is more convenient to use because the connection between the sealing tube and the water inlet is completed while positioning the intermediate body, but the above scheme still has the following shortcomings when used:

[0004] The above-mentioned turbocharger housing air tightness testing equipment solution has significant drawbacks. Due to the lack of the function of dewatering the turbocharger after testing, the turbocharger is immersed in water during the testing process, resulting in a large amount of moisture remaining on the surface. This requires an additional process to carry out dewatering and drying treatment on the turbocharger. This not only prolongs the time of the entire testing and production process, reduces production efficiency, but also increases manpower and material costs.

[0005] Therefore, it is necessary to design a turbocharger casing air tightness detection device to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a turbocharger housing air tightness detection device.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A turbocharger housing air tightness testing device comprises a body, a video recording device mounted on the body, a water tank fixed on the body, a partition fixed inside the water tank, a sliding opening formed on a side of the water tank, the sliding opening being located below the partition, a fixing frame fixed on the body, a cylinder mounted on the body, a pressing member disposed below the fixing frame, a positioning member disposed above the water tank, the water tank being made of a transparent material and disposed directly opposite the video recording device;

[0009] Wherein, the pressing member is connected to the telescopic end of the cylinder via a first connecting assembly;

[0010] Wherein, the positioning member is connected to the inner bottom surface of the water tank through a second connecting assembly;

[0011] Wherein, a driving unit is provided inside the water tank, and the driving unit is used to drive the positioning member to rotate, and the driving unit is located below the partition, and the driving unit includes a driving assembly and a transmission assembly;

[0012] Wherein, a water retaining assembly is provided above the water tank to prevent water from splashing.

[0013] As a preferred technical solution of the present invention, the first connecting component includes a connecting plate and a vertical rod, and two holes are provided on the connecting plate. The telescopic end of the cylinder extends to one of the holes and is fixed in the hole, and the vertical rod is rotatably installed in the other hole. The interior of the vertical rod is hollow, and the vertical rod is connected to the lower pressure piece, and a rotary joint is installed on the top of the vertical rod.

[0014] As a preferred technical solution of the present invention, the second connecting component includes an outer cylinder and a sliding rod. The outer cylinder is rotatably installed on the inner bottom surface of the water tank. The outer cylinder passes through the partition and is rotatably connected to the partition. The sliding rod is slidably arranged in the outer cylinder. The top end of the sliding rod extends to the outside of the outer cylinder and is fixedly connected to the positioning member. The outer cylinder and the sliding rod are connected by a first spring. The inner circle of the outer cylinder cross section and the cross section of the sliding rod are both rectangular structures.

[0015] As a preferred technical solution of the present invention, the outer cylinder, inner rod, positioning member, pressing member and vertical rod are coaxially arranged.

[0016] As a preferred technical solution of the present invention, the driving assembly includes an electric push cylinder, a horizontal plate, a threaded rod, a movable seat and a rack. The electric push cylinder is installed inside the water tank, the horizontal plate is fixed to the telescopic end of the electric push cylinder, the threaded rod is installed on the side of the horizontal plate through two bearing seats, the movable seat is threadedly sleeved on the threaded rod, the rack is fixed to the side of the movable seat, and a fixed rod is fixed at the end position of the threaded rod. The fixed rod passes through the sliding mouth at one end away from the threaded rod and extends to the outside of the water tank.

[0017] As a preferred technical solution of the present invention, the transmission assembly includes a first gear, a rotating shaft, a second gear, a third gear and a fourth gear. The first gear and the fourth gear are fixedly mounted on the outer cylinder, the rotating shaft is rotatably installed on the inner bottom surface of the water tank, the second gear and the third gear are fixedly mounted on the rotating shaft, and the third gear and the fourth gear are engaged with each other.

[0018] As a preferred technical solution of the present invention, the water retaining assembly includes a water retaining cylinder, a rotating door and a mounting plate, one end of the mounting plate is fixedly connected to the machine body, and the other end is fixedly connected to the water retaining cylinder, the water retaining cylinder is located directly above the water tank, the rotating door is rotatably installed on the water retaining cylinder, and the rotating door and the water retaining cylinder together form a cylindrical structure.

[0019] As a preferred technical solution of the present invention, a plurality of jet tubes are fixed inside the water retaining cylinder, each of the jet tubes is provided with a plurality of jet holes, and two adjacent jet tubes are connected by a connecting pipe. An air supply component is provided inside the water tank, and the air supply component is located below the partition.

[0020] As a preferred technical solution of the present invention, the air supply assembly includes a sealing cylinder, a sliding plug, a connecting rod and an air supply pipe. The sealing cylinder is fixed inside the water tank, the sliding plug is sealingly slidably connected inside the sealing cylinder, one end of the connecting rod is connected to the sliding plug, and the other end extends to the outside of the sealing cylinder, the sliding plug and the sealing cylinder are connected by a second spring, one end of the air supply pipe is connected to the sealing cylinder, and the other end is connected to one of the injection pipes.

[0021] As a preferred technical solution of the present invention, a slidable wiper ring is provided inside the water retaining cylinder, and the outer edge of the wiper ring is in contact with the inner surface of the water retaining cylinder, a plurality of avoidance grooves are provided on the wiper ring, and a plurality of the jet pipes pass through the plurality of avoidance grooves respectively, a push rod is fixed on the wiper ring, the push rod passes through the fixing frame, and is slidably connected to the fixing frame, a sleeve plate is fixed to one end of the push rod located above the fixing frame, and the sleeve plate and the fixing frame are connected by a third spring.

[0022] The present invention has the following beneficial effects:

[0023] 1. After the test is completed, the hand wheel is turned to align the rack with the second gear, and the electric push cylinder is started again to drive the turbocharger housing to rotate at high speed to remove the residual water on its surface. This realizes the dehydration treatment of the turbocharger housing after the test, avoiding the trouble of additional dehydration process later, saving time and cost;

[0024] 2. During the test, the electric push cylinder drives the rack to move, driving the first gear to rotate, thereby slowly rotating the turbocharger housing between the positioning piece and the lower pressure piece. At the same time, the video recording device is used to capture the underwater turbocharger housing in all directions, which helps the staff to accurately find the leak point and improve the accuracy and efficiency of the test.

[0025] 3. During the high-speed water removal process of the turbocharger housing, the water retaining cylinder can prevent water from splashing. At the same time, when the rack drives the second gear to rotate, it also pushes the connecting rod to move the sliding plug, pressing the gas in the sealing cylinder into the jet pipe and ejecting it through the jet hole to blow away the water on the surface of the turbocharger housing. This, combined with the centrifugal water removal action, greatly improves the water removal effect.

[0026] 4. After the inspection is completed, the staff can press the push rod downward to drive the wiper ring to move downward to scrape off the residual water attached to the inner surface of the water retaining cylinder, avoiding the residual water on the rotating door from dripping everywhere during subsequent inspections, ensuring the cleanliness of the inspection environment and the normal use of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the turbocharger housing air tightness detection device proposed by the present invention;

[0028] Figure 2 It is a structural diagram of the fixing frame and the water tank;

[0029] Figure 3 It is a schematic diagram of the cross-sectional structure of the fixing frame and the water tank;

[0030] Figure 4 It is a structural schematic diagram of the water retaining assembly;

[0031] Figure 5 This is a schematic diagram of the structure when the swing door is open;

[0032] Figure 6 Schematic diagram of the structure of the drive unit;

[0033] Figure 7 Schematic diagram of the cross-sectional structure of the water tank Figure 1 ;

[0034] Figure 8 Schematic diagram of the cross-sectional structure of the water tank Figure 2 ;

[0035] Figure 9 for Figure 3 A magnified view of the structure at point A;

[0036] Figure 10 for Figure 6 A magnified view of the structure at point B.

[0037] In the figure: 11, body; 12, video recording device; 13, water tank; 131, partition; 132, slide; 14, fixed frame; 15, cylinder; 16, pressing member; 17, positioning member; 21, connecting plate; 22, vertical rod; 23, rotary joint; 31, outer cylinder; 32, slide rod; 33, first spring; 41, electric push cylinder; 42, horizontal plate; 43, threaded rod; 44, movable seat; 45, rack; 46, fixed Rod; 47, first gear; 48, rotating shaft; 49, second gear; 410, third gear; 411, fourth gear; 51, water retaining cylinder; 52, rotating door; 53, mounting plate; 61, jet pipe; 62, jet hole; 63, connecting pipe; 64, sealing cylinder; 65, sliding plug; 66, connecting rod; 67, second spring; 68, air supply pipe; 71, wiper ring; 72, push rod; 73, sleeve plate; 74, third spring. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] Reference Figures 1-10 The turbocharger housing air tightness testing device includes a body 11, a video recording device 12 is installed on the body 11, a water tank 13 is fixed on the body 11, a partition 131 is fixed inside the water tank 13, a sliding opening 132 is opened on the side of the water tank 13, and the sliding opening 132 is located below the partition 131. A fixing frame 14 is fixed on the body 11, a cylinder 15 is installed on the body 11, a pressing member 16 is provided below the fixing frame 14, and a positioning member 17 is provided above the water tank 13. The water tank 13 is made of a transparent material and is arranged directly opposite the video recording device 12.

[0040] The lower pressure piece 16 is connected to the telescopic end of the cylinder 15 through a first connecting assembly. The first connecting assembly includes a connecting plate 21 and a vertical rod 22. The connecting plate 21 has two holes. The telescopic end of the cylinder 15 extends into one of the holes and is fixed therein. The vertical rod 22 is rotatably installed in the other hole. The vertical rod 22 is hollow inside and communicates with the lower pressure piece 16. A rotary joint 23 is installed at the top of the vertical rod 22.

[0041] The positioning member 17 is connected to the inner bottom surface of the water tank 13 through a second connecting assembly, which includes an outer cylinder 31 and a sliding rod 32. The outer cylinder 31 is rotatably mounted on the inner bottom surface of the water tank 13. The outer cylinder 31 passes through the partition 131 and is rotatably connected to the partition 131. The sliding rod 32 is slidably arranged in the outer cylinder 31. The top end of the sliding rod 32 extends to the outside of the outer cylinder 31 and is fixedly connected to the positioning member 17. The outer cylinder 31 and the sliding rod 32 are connected by a first spring 33. The inner ring of the cross-section of the outer cylinder 31 and the cross-section of the sliding rod 32 are both rectangular structures. The outer cylinder 31, the inner rod, the positioning member 17, the down-pressing member 16 and the vertical rod 22 are coaxially arranged.

[0042] When the turbocharger housing air tightness detection device proposed by the present invention is in use, the staff opens the rotating door 52, places the turbocharger housing to be tested on the positioning member 17, then closes the rotating door 52 and starts the cylinder 15. When the cylinder 15 is running, it can drive the connecting plate 21 to move downward, so that the connecting plate 21 drives the vertical rod 22 to move downward. When the vertical rod 22 moves downward, the pressing member 16 moves downward accordingly and presses the turbocharger housing. At this time, the positioning member 17 and the pressing member 16 jointly seal and fix the turbocharger housing. It should be noted that the specific structure and working principle of the positioning member 17 and the pressing member 16 are existing technologies, and the implementation method adopts conventional means. It is not shown and will not be described in detail here. Further, as the telescopic end of the cylinder 15 extends, the pressing member 16 will drive the turbocharger housing to move downward until the turbocharger housing is submerged in water. At the same time, the positioning member 17 and the slide rod 32 will also move downward, so that the slide rod 32 extends into the interior of the outer cylinder 31. When the turbocharger housing is completely submerged in water, the staff supplies air to the pressing member 16 through the vertical rod 22 to fill the turbocharger housing with gas. If there is a leak in the turbocharger housing, the gas will escape upward on the water surface in the form of bubbles. Therefore, the staff can judge the sealing of the turbocharger housing by observing whether bubbles are generated in the water.

[0043] A driving unit is provided inside the water tank 13. The driving unit is used to drive the positioning member 17 to rotate, and the driving unit is located below the partition 131. The driving unit includes a driving assembly and a transmission assembly. The driving assembly includes an electric push cylinder 41, a cross plate 42, a threaded rod 43, a movable seat 44 and a rack 45. The electric push cylinder 41 is installed inside the water tank 13. The cross plate 42 is fixed to the telescopic end of the electric push cylinder 41. The threaded rod 43 is installed on the side of the cross plate 42 through two bearing seats. The movable seat 44 is threadedly sleeved on the threaded rod 43. The rack 45 is fixed to the side of the movable seat 44. A fixing rod 46 is fixed to the end of the threaded rod 43. The end of the fixing rod 46 away from the threaded rod 43 passes through the sliding opening 132 and extends to the outside of the water tank 13. The transmission assembly includes a first gear 47, a rotating shaft 48, a second gear 49, a third gear 410 and a fourth gear 411. The first gear 47 and the fourth gear 411 are fixedly mounted on the outer cylinder 31. The rotating shaft 48 is rotatably mounted on the inner bottom surface of the water tank 13. The second gear 49 and the third gear 410 are fixedly mounted on the rotating shaft 48. The third gear 410 and the fourth gear 411 are meshed with each other.

[0044] In the initial state, the rack 45 is arranged opposite to the first gear 47. During the test, the staff starts the electric push cylinder 41, so that the electric push cylinder 41 drives the cross plate 42 to move. When the cross plate 42 moves, the movable seat 44 and the rack 45 move accordingly. The rack 45 will mesh with the first gear 47 during the movement and drive the first gear 47 to rotate. When the first gear 47 rotates, it can drive the outer cylinder 31 to rotate. Since the inner ring of the cross section of the outer cylinder 31 and the cross section of the slide rod 32 are both rectangular structures, the positioning member 17 can be driven to rotate through the slide rod 32 when the outer cylinder 31 rotates, and finally the turbocharger housing between the positioning member 17 and the lower pressure member 16 is slowly rotated. In addition, a video recording device 12 is installed on the body 11. During the test, the staff can use the video recording device 12 to record the test process. When the turbocharger housing is slowly rotating, the video recording device 12 can fully shoot the turbocharger housing in the water, so that the staff can accurately find the leakage point of the turbocharger housing.

[0045] After the test is completed, the staff controls the telescopic end of the cylinder 15 to retract. During this process, the turbocharger housing will move up and reset under the elastic force of the first spring 33 until the turbocharger housing is separated from the water. At the same time, the staff also needs to control the telescopic end of the electric push cylinder 41 to reset. When the turbocharger housing and the electric push cylinder 41 are reset, the staff rotates the handwheel to drive the fixed rod 46 to rotate. When the fixed rod 46 rotates, it drives the threaded rod 43 to rotate, so that the threaded rod 43 drives the moving seat 44 to move. When the moving seat 44 moves, the rack 45 moves accordingly. When the moving seat 44 moves to the end position of the cross plate 42, the moving seat 44 cannot continue to move. At this time, the rack 45 just moves to the position facing the second gear 49, so as to facilitate the subsequent dewatering of the turbocharger housing.

[0046] When removing water from the turbocharger housing, the staff starts the electric push cylinder 41 again, so that the cross plate 42 drives the rack 45 to move. Since the rack 45 is located opposite the second gear 49, the rack 45 will mesh with the second gear 49 when it moves, and drive the second gear 49 to rotate. Figure 7 and Figure 8 As shown, when the second gear 49 rotates, it drives the rotating shaft 48 to rotate. The rotation of the rotating shaft 48 is transmitted to the outer cylinder 31 through the mutually meshing third gear 410 and the fourth gear 411, so that the outer cylinder 31 drives the turbocharger housing to rotate again. It is worth mentioning that the transmission of the third gear 410 and the fourth gear 411 can accelerate the rotation speed of the rotating shaft 48, so that the outer cylinder 31 drives the turbocharger housing to rotate at a high speed. During the high-speed rotation of the turbocharger housing, the moisture remaining on the surface of the turbocharger housing can be shaken off, which has the effect of removing water from the turbocharger housing. Therefore, the turbocharger housing air tightness detection device proposed by the present invention not only has the function of detecting air tightness, but also has the function of removing water from the turbocharger housing after detection.

[0047] A water retaining assembly is provided above the water tank 13 to prevent water from splashing. The water retaining assembly includes a water retaining cylinder 51, a rotating door 52, and a mounting plate 53. One end of the mounting plate 53 is fixedly connected to the body 11, and the other end is fixedly connected to the water retaining cylinder 51. The water retaining cylinder 51 is located directly above the water tank 13. The rotating door 52 is rotatably mounted on the water retaining cylinder 51, and the rotating door 52 and the water retaining cylinder 51 together form a cylindrical structure.

[0048] A plurality of jet pipes 61 are fixed to the inside of the water retaining cylinder 51, and a plurality of jet holes 62 are opened on each jet pipe 61. Adjacent jet pipes 61 are connected by a connecting pipe 63. An air supply assembly is provided inside the water tank 13, and the air supply assembly is located below the partition 131. The air supply assembly includes a sealing cylinder 64, a sliding plug 65, a connecting rod 66 and an air supply pipe 68. The sealing cylinder 64 is fixed to the inside of the water tank 13, and the sliding plug 65 is sealingly and slidably connected to the inside of the sealing cylinder 64. One end of the connecting rod 66 is connected to the sliding plug 65, and the other end extends to the outside of the sealing cylinder 64. The sliding plug 65 and the sealing cylinder 64 are connected by a second spring 67. One end of the air supply pipe 68 is connected to the sealing cylinder 64, and the other end is connected to one of the jet pipes 61.

[0049] During the water removal process, since the turbocharger housing is located inside the water retaining cylinder 51, the water on the surface of the turbocharger housing will be thrown to the inner surface of the water retaining cylinder 51. The design of the water retaining cylinder 51 can prevent water from splashing. In order to improve the water removal effect on the turbocharger housing, a plurality of jet pipes 61 are further provided inside the water retaining cylinder 51, and each jet pipe 61 is provided with a jet hole 62. When the rack 45 drives the second gear 49 to rotate, the rack 45 will also push the connecting rod 66, so that the connecting rod 66 drives the sliding plug 65 to move. When the sliding plug 65 moves, it can press the gas in the sealing cylinder 64 into the corresponding jet pipe 61 through the connecting pipe 63, so that the gas is ejected through the plurality of jet holes 62. The gas ejected from the plurality of jet holes 62 can blow away the moisture on the surface of the turbocharger housing, and at the same time, cooperate with the centrifugal water-removing action of the turbocharger housing to improve the water removal effect on the turbocharger housing.

[0050] A slidable wiper ring 71 is provided inside the water retaining cylinder 51, and the outer edge of the wiper ring 71 is in contact with the inner surface of the water retaining cylinder 51. A plurality of avoidance grooves are provided on the wiper ring 71, and a plurality of jet pipes 61 pass through the plurality of avoidance grooves respectively. A push rod 72 is fixed to the wiper ring 71, and the push rod 72 passes through the fixing frame 14 and is slidably connected to the fixing frame 14. A sleeve plate 73 is fixed to one end of the push rod 72 located above the fixing frame 14, and the sleeve plate 73 is connected to the fixing frame 14 by a third spring 74.

[0051] For the water retaining cylinder 51, after the inspection work is completed, the staff can press the push rod 72 downward, so that the push rod 72 drives the wiper ring 71 to move downward. When the wiper ring 71 moves downward, it can scrape off the residual water attached to the inner surface of the water retaining cylinder 51, thereby clearing the water on the inner surface of the water retaining cylinder 51. Through this design, the phenomenon of residual water on the rotating door 52 dripping everywhere during the subsequent inspection of the turbocharger housing can be avoided.

[0052] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. Turbocharger housing air tightness testing equipment, characterized in that: The apparatus comprises a body, a video recording device is mounted on the body, a water tank is fixed on the body, a partition is fixed inside the water tank, a sliding opening is opened on the side of the water tank, and the sliding opening is located below the partition, a fixing frame is fixed on the body, a cylinder is mounted on the body, a pressing member is provided below the fixing frame, a positioning member is provided above the water tank, the water tank is made of a transparent material, and the water tank is arranged directly opposite the video recording device; The lower pressing member is connected to the telescopic end of the cylinder through a first connecting assembly, and the first connecting assembly includes a connecting plate and a vertical rod. The connecting plate is provided with two holes. The telescopic end of the cylinder extends into one of the holes and is fixed in the hole. The vertical rod is rotatably installed in the other hole. The vertical rod is hollow inside and is connected to the lower pressing member. A rotary joint is installed on the top of the vertical rod. The positioning member is connected to the inner bottom surface of the water tank through a second connecting assembly, and the second connecting assembly includes an outer cylinder and a sliding rod. The outer cylinder is rotatably mounted on the inner bottom surface of the water tank, and the outer cylinder passes through the partition and is rotatably connected to the partition. The sliding rod is slidably arranged in the outer cylinder, and the top end of the sliding rod extends to the outside of the outer cylinder and is fixedly connected to the positioning member. The outer cylinder and the sliding rod are connected by a first spring. The inner ring of the cross section of the outer cylinder and the cross section of the sliding rod are both rectangular structures. A driving unit is provided inside the water tank, and the driving unit is used to drive the positioning member to rotate. The driving unit is located below the partition, and the driving unit includes a driving assembly and a transmission assembly; The driving assembly includes an electric push cylinder, a horizontal plate, a threaded rod, a movable seat and a rack. The electric push cylinder is installed inside the water tank. The horizontal plate is fixed to the telescopic end of the electric push cylinder. The threaded rod is installed on the side of the horizontal plate through two bearing seats. The movable seat is threadedly sleeved on the threaded rod. The rack is fixed to the side of the movable seat. A fixed rod is fixed at the end position of the threaded rod. The end of the fixed rod away from the threaded rod passes through the sliding port and extends to the outside of the water tank. A water retaining assembly is provided above the water tank to prevent water from splashing.

2. The turbocharger housing air tightness detection device according to claim 1, characterized in that: The outer cylinder, the inner rod, the positioning member, the pressing member and the vertical rod are coaxially arranged.

3. The turbocharger housing air tightness detection device according to claim 1, characterized in that: The transmission assembly includes a first gear, a rotating shaft, a second gear, a third gear and a fourth gear. The first gear and the fourth gear are fixedly mounted on the outer cylinder. The rotating shaft is rotatably mounted on the inner bottom surface of the water tank. The second gear and the third gear are fixedly mounted on the rotating shaft. The third gear and the fourth gear are engaged with each other.

4. The turbocharger housing air tightness detection device according to claim 1, characterized in that: The water retaining assembly includes a water retaining cylinder, a rotating door and a mounting plate. One end of the mounting plate is fixedly connected to the machine body, and the other end is fixedly connected to the water retaining cylinder. The water retaining cylinder is located directly above the water tank. The rotating door is rotatably mounted on the water retaining cylinder, and the rotating door and the water retaining cylinder together form a cylindrical structure.

5. The turbocharger housing air tightness detection device according to claim 4, characterized in that: A plurality of jet tubes are fixed inside the water retaining cylinder, each of which is provided with a plurality of jet holes, and two adjacent jet tubes are connected by a connecting pipe. An air supply component is provided inside the water tank, and the air supply component is located below the partition.

6. The turbocharger housing air tightness detection device according to claim 5, characterized in that: The air supply assembly includes a sealing cylinder, a sliding plug, a connecting rod and an air supply pipe. The sealing cylinder is fixed inside the water tank. The sliding plug is sealingly and slidingly connected inside the sealing cylinder. One end of the connecting rod is connected to the sliding plug, and the other end extends to the outside of the sealing cylinder. The sliding plug and the sealing cylinder are connected by a second spring. One end of the air supply pipe is connected to the sealing cylinder, and the other end is connected to one of the injection pipes.

7. The turbocharger housing air tightness detection device according to claim 5, characterized in that: A slidable wiper ring is provided inside the water retaining cylinder, and the outer edge of the wiper ring fits against the inner surface of the water retaining cylinder. A plurality of avoidance grooves are provided on the wiper ring, and a plurality of the jet pipes pass through the plurality of avoidance grooves respectively. A push rod is fixed on the wiper ring, and the push rod passes through the fixing frame and is slidably connected to the fixing frame. A sleeve plate is fixed to one end of the push rod located above the fixing frame, and the sleeve plate and the fixing frame are connected by a third spring.

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