A propeller stern sealing test device

Abstract

The present invention discloses a propeller stern sealing test device, which relates to a sealing test, including a water tank, one side of a mounting plate frame is fixedly connected with the water tank, the other side of the mounting plate frame is fixedly connected with a motor for driving the stern shaft to rotate, a liquid level gauge is installed on the outside of the water tank, the liquid level gauge is connected with the water tank through a pipeline, a positioning flange for sealingly placing the stern shaft is fixedly connected to the side of the water tank close to the motor, the positioning flange penetrates into the water tank, the pipeline on the liquid level gauge passes through the positioning flange and enters the water tank, and a suction plate is fixedly connected to the bottom of the water tank in a through-type manner. The present invention simulates its actual turbid working environment by pouring a mixture of mud and water into the water tank, and performs a sealing test in combination with matching parts and tooling such as the positioning flange and bearings as much as possible, so that the sealing test can restore the actual use situation as much as possible.

Description

Technical Field

[0001] The invention relates to a sealing test, in particular to a propeller stern sealing test device. Background Art

[0002] The thruster stern is a propulsion system located at the stern of a ship that generates thrust and propels the ship forward. In order to ensure that seawater, oil and gas or other harmful media do not penetrate into the propulsion system during operation, it is necessary to conduct a sealing test on the thruster stern, on the one hand to avoid thrust loss due to leakage, and on the other hand to prevent safety accidents. Among them, the sealing test of the stern shaft is particularly important. The sealing test of the stern shaft is mainly to check whether the seals on the stern tube are damaged, aged or worn, to ensure that they can effectively prevent seawater from entering the stern tube.

[0003] The patent with the authorization announcement number CN111751059B discloses a stern shaft mechanical seal pressure test device, which relates to the field of mechanical speed measurement technology, including a box body, two support rods are fixedly connected to the top of the box body, a top plate is welded to the top of the support rod, a drive motor is arranged below the top plate, a lifting mechanism is arranged on both sides of the drive motor, a disc is fixedly connected to the output shaft of the drive motor, a second gear is fixedly connected to the bottom of the disc, and a sealing mechanism fixedly connected to the lifting mechanism is arranged on both sides of the second gear. It mainly aims to improve the problem that the existing sealing detection equipment is not convenient for dynamic sealing detection of the stern shaft and the sealed bearing, resulting in errors in the detection results, and manual fixation during detection is time-consuming and labor-intensive.

[0004] However, the above patent cannot simulate the actual turbid working environment of the stern shaft, and cannot study the influence of the change of water quality on the sealing test. Therefore, the present invention provides a propeller stern sealing test device. Summary of the invention

[0005] In order to overcome the shortcomings of the above patent that the actual turbid working environment of the stern shaft cannot be simulated and the influence of the change of water quality on the sealing test cannot be studied, the present invention provides a propeller stern sealing test device.

[0006] A propeller stern sealing test device comprises a water tank, one side of a mounting plate frame is fixedly connected to the water tank, the other side of the mounting plate frame is fixedly connected to a motor for driving the stern shaft to rotate, a liquid level gauge is installed on the outside of the water tank, the liquid level gauge is connected to the water tank through a pipeline, a positioning flange for sealingly placing the stern shaft is fixedly connected to the side of the water tank close to the motor, the positioning flange penetrates into the water tank, the pipeline on the liquid level gauge passes through the positioning flange and enters into the water tank, a suction plate is fixedly connected to the bottom of the water tank in a through-type manner, and the suction plate is connected to a suction pipe , a mounting tank body is fixedly connected to a side of the water tank away from the positioning flange, a liquid pump is fixedly connected to a side of the water tank close to the mounting tank body, a liquid inlet of the liquid pump is communicated with the mounting tank body through a pipeline, a liquid outlet of the liquid pump is communicated with a discharge pipe, a spray plate is fixedly connected to the bottom of the water tank in a through-type manner, the spray plate is communicated with the discharge pipe, a conical filter plate is fixedly connected to the upper part of the mounting tank body, a conical collector is fixedly connected to the lower part of the mounting tank body, the conical collector is used to collect sediment filtered by the conical filter plate, and the conical collector is fixedly connected to the conical filter plate.

[0007] In a preferred embodiment of the present invention, the motor is connected to the stern shaft via a universal joint connecting plate.

[0008] In a preferred embodiment of the present invention, the positioning flange is connected to the stern shaft via a bearing.

[0009] In a preferred embodiment of the present invention, a storage frame is further included, wherein the storage frame is fixedly connected to a side of the water tank close to the tank cover, the water tank is fixedly connected to electric slide rails symmetrically distributed along the water tank, first connecting frames are slidably connected between the symmetrically distributed electric slide rails, and baffles for blocking the storage frame outlet are fixedly connected between all the first connecting frames.

[0010] In a preferred embodiment of the present invention, it also includes a second connecting frame corresponding to the first connecting frame, the second connecting frame is fixedly connected to the corresponding first connecting frame, and a liquid pushing plate frame is fixedly connected between all the second connecting frames, and the liquid pushing plate frame is located inside the water tank.

[0011] In a preferred embodiment of the present invention, it further comprises a plurality of telescopic rods, wherein the telescopic rods are fixedly connected between the liquid pushing plate frame and the inner wall of the water tank.

[0012] In a preferred embodiment of the present invention, it also includes a plurality of support blocks, wherein the support blocks are fixedly connected to the inner wall of the water tank, a stirring frame is rotatably connected between all the support blocks, a side of the stirring frame close to the stern shaft is fixedly connected to circumferentially distributed elastic ropes, and a stop block is fixedly connected between all the elastic ropes, and the stop block is frictionally fitted with the end of the stern shaft.

[0013] In a preferred embodiment of the present invention, the stirring frame is provided with circumferentially distributed corrugated plates.

[0014] In a preferred embodiment of the present invention, it also includes a third connecting frame symmetrically distributed along the liquid pushing plate frame, the third connecting frame is fixedly connected to the liquid pushing plate frame, the third connecting frame is rotatably connected to a connecting rod, the inner wall of the water tank is fixedly connected to a space cam symmetrically distributed along the water tank, the connecting rod is fixedly connected to a protrusion at one end close to the adjacent space cam, the protrusion is slidably connected to the adjacent space cam, and the connecting rod is fixedly connected to at least two disturbance blocks.

[0015] In a preferred embodiment of the present invention, the disturbance block is provided with grooves which are symmetrically distributed along the disturbance block.

[0016] The beneficial effects of the present invention are:

[0017] The present invention simulates the actual turbid working environment by pouring a mixture of mud and water into the water tank, and performs a sealing test in combination with matching parts and tooling such as positioning flanges and bearings as much as possible, so that the sealing test can restore the actual usage conditions as much as possible.

[0018] While simulating an actual turbid working environment, the present invention can reduce misjudgment caused by sediment interference by dynamically purifying the water quality, making it easier to find subtle leakage points. The dynamic test results performed at this time can better reflect the actual sealing state of the stern shaft seal, which is conducive to more accurate evaluation of the sealing performance.

[0019] The present invention can detect the influence of gradually increasing physical wear on the sealing performance of the stern shaft seal by dynamically turbidifying the water quality. The dynamic test results performed at this time can better reflect the sealing state of the stern shaft seal disturbed by mud and sand wear, and are also conducive to more accurate evaluation of the sealing performance.

[0020] The present invention drives the liquid pushing plate frame to move intermittently left and right by the intermittent left and right movement of the first connecting frame, so that the mixed liquid in the water tank is disturbed, simulating the flow of the mixed liquid. At the same time, this flow situation can stir up the sediment and reduce the occurrence of sediment sinking to the bottom, thus improving the authenticity and accuracy of the detection.

[0021] The present invention uses the liquid resistance when the stirring frame rotates to block the rotation of the stern shaft, simulating the situation where the stern shaft is blocked by being entangled by waterweeds during navigation, thereby further improving the authenticity and accuracy of the detection.

[0022] The present invention stirs up the sediment that has settled to the bottom on the front and rear sides by intermittent forward and reverse rotation of the disturbance block, further reducing the occurrence of sediment settling to the bottom, thereby further improving the authenticity and accuracy of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0024] Figure 2 It is a three-dimensional structural schematic diagram of the installation plate frame, water tank, motor and other components of the present invention.

[0025] Figure 3 It is a three-dimensional structural schematic diagram of components such as a water tank, a motor and a liquid level meter of the present invention.

[0026] Figure 4 It is a schematic diagram of the exploded three-dimensional structure of the positioning flange and the stern shaft of the present invention.

[0027] Figure 5 It is a three-dimensional structural schematic diagram of the suction plate, suction pipe, mounting tank and other components of the present invention.

[0028] Figure 6 It is a three-dimensional structural schematic diagram of the components such as the discharge pipe, the spray plate and the conical filter plate of the present invention.

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the conical filter plate and the conical collector of the present invention.

[0030] Figure 8 It is a three-dimensional structural schematic diagram of components such as a storage frame, an electric slide rail and a first connecting frame of the present invention.

[0031] Fig. 9 It is a three-dimensional structural schematic diagram of components such as the electric slide rail, the first connecting frame and the baffle plate of the present invention.

[0032] Fig.10 It is a schematic diagram of the three-dimensional structure of the mounting plate frame, the second connecting frame, the telescopic rod and other components of the present invention.

[0033] Fig.11 It is a three-dimensional structural schematic diagram of the liquid pushing plate frame, the second connecting frame and the telescopic rod of the present invention.

[0034] Fig.12 It is a schematic diagram of the three-dimensional structure of the stirring frame, support block, elastic rope and other components of the present invention.

[0035] Fig.13It is a schematic diagram of the three-dimensional structure of the supporting block, elastic rope, and stop block of the present invention.

[0036] Fig.14 It is a schematic diagram of the three-dimensional structure of the disturbance block, the connecting rod, the third connecting frame and other components of the present invention.

[0037] Fig.15 It is a schematic diagram of the exploded three-dimensional structure of the third connecting frame, the spatial cam, the protrusion and other components of the present invention.

[0038] Wherein: 1. mounting plate frame, 11. water tank, 12. motor, 13. liquid level gauge, 14. positioning flange, 15. stern shaft, 16. suction plate, 17. suction pipe, 18. mounting tank, 19. liquid pump, 110. discharge pipe, 111. spray plate, 112. conical filter plate, 113. conical collector, 2. storage frame, 21. electric slide rail, 22. first connecting frame, 23. baffle, 3. liquid pushing plate frame, 31. second connecting frame, 32. telescopic rod, 4. stirring frame, 41. support block, 42. elastic rope, 43. block, 5. disturbance block, 51. connecting rod, 52. third connecting frame, 53. space cam, 54. bump. DETAILED DESCRIPTION

[0039] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Embodiment 1: A propeller stern sealing test device, such as Figures 1 to 7As shown, it includes a water tank 11, the water tank 11 is fixedly connected to the right side of the top of the mounting plate frame 1, a tank cover is sealed in the middle of the top of the water tank 11, a motor 12 for driving the stern shaft 15 to rotate is fixedly connected to the left side of the top of the mounting plate frame 1, a liquid level gauge 13 is installed on the front of the left wall of the water tank 11, the liquid level gauge 13 is connected with the water tank 11 through a pipeline, a positioning flange 14 for sealingly placing the stern shaft 15 is fixedly connected to the left side of the water tank 11, the positioning flange 14 penetrates into the water tank 11, the pipeline on the liquid level gauge 13 passes through the positioning flange 14 and enters the water tank 11, a bearing is installed on the inner ring of the positioning flange 14, the stern shaft 15 passes through the inner ring of the bearing, a sealing gasket is arranged between the inner ring of the bearing and the stern shaft 15, the right end of the stern shaft 15 is located in the water tank 11, and the left end of the stern shaft 15 is fixedly connected to the motor 12 through a universal joint connecting plate, and the water A suction plate 16 is fixedly connected to the front side of the bottom of the box 11 in a through-type manner, and a suction pipe 17 is connected to the right side of the suction plate 16. A mounting tank body 18 is fixedly connected to the front side of the right wall of the water tank 11, and a liquid pump 19 is fixedly connected to the rear side of the right wall of the water tank 11. The liquid inlet of the liquid pump 19 is connected to the mounting tank body 18 through a pipeline, and the liquid outlet of the liquid pump 19 is connected to a discharge pipe 110. A spray plate 111 is fixedly connected to the rear side of the bottom of the water tank 11 in a through-type manner, and the spray plate 111 is connected to the discharge pipe 110. A conical filter plate 112 is fixedly connected to the upper part of the mounting tank body 18, and the conical filter plate 112 isolates the silt below. A conical collector 113 is fixedly connected to the lower part of the mounting tank body 18. The conical collector 113 is used to collect the silt filtered by the conical filter plate 112, and the conical collector 113 and the conical filter plate 112 are fixedly connected by two supporting frames.

[0041] When using the device to test the sealing performance of the stern shaft 15, first, insert the stern shaft 15 into the inner ring of the bearing inside the positioning flange 14, and make the right end of the stern shaft 15 penetrate into the water tank 11, and the sealing gasket of the inner ring of the bearing can fully seal the outside of the stern shaft 15, and then connect the left end of the stern shaft 15 to the motor 12 through the universal joint connecting plate. After the stern shaft 15 is sealed and assembled, open the cover of the water tank 11, and fill the water tank 11 with a mixture of mud and water to simulate its actual turbidity. The working environment is set, and then the box cover is sealed. Subsequently, the motor 12 is adjusted to reach the actual working speed to drive the stern shaft 15 to rotate for testing. The sealing of the stern shaft 15 is observed by the liquid level gauge 13. Specifically: if the sealing of the stern shaft 15 is good, the liquid level in the water tank 11 is almost unchanged, and the liquid level value displayed by the liquid level gauge 13 is almost unchanged; if the sealing of the stern shaft 15 is poor, the water in the water tank 11 leaks into the stern shaft 15, so that the liquid level in the water tank 11 is significantly reduced, and the liquid level value displayed by the liquid level gauge 13 is significantly reduced.

[0042] During the above test, the presence of silt may cover up small leaks, which may interfere with the test results. To reduce the possibility of misjudgment, the specific operation is as follows: start the liquid pump 19, and the mixture of silt and water in the water tank 11 is sucked into the installation tank 18 through the suction plate 16 and the suction pipe 17 in turn. After the cone filter plate 112 inside the installation tank 18 acts, the water passes through the cone filter plate 112 upward, and the silt is filtered out and collected on the cone collector 113. The water passing upward enters the liquid pump 19 again, and then passes through the discharge pipe 17 in turn. The pipe 110 and the spray plate 111 flow back into the water tank 11, so that the liquid in the water tank 11 gradually changes from turbid to clear, and the water quality gradually changes from turbid to clear, which means that the suspended sediment solids are reduced, so that the stern shaft 15 is gradually tested for sealing under conditions of nearly clear water. Therefore, the present invention can reduce misjudgment caused by sediment interference by dynamically purifying the water quality, and it is easier to find subtle leakage points. The dynamic test results performed at this time can better reflect the actual sealing state of the stern shaft 15 seal, which is conducive to more accurate evaluation of the sealing performance.

[0043] like Figure 8 and Fig. 9 As shown, a storage frame 2 is also included, which is fixedly connected to a side of the water tank 11 close to the tank cover, and mud and sand are placed in the storage frame 2. The upper part of the inner wall of the water tank 11 is fixedly connected to an electric slide rail 21 symmetrically distributed along the front and back of the water tank 11, and a first connecting frame 22 is slidably connected between the electric slide rails 21 symmetrically distributed along the left and right directions. A baffle 23 for blocking the outlet of the storage frame 2 is fixedly connected between the two first connecting frames 22, and the baffle 23 is intermittently opened to intermittently discharge the mud and sand.

[0044] When the seal of the stern shaft 15 is in dynamic operation, the wear may be accelerated, resulting in a decrease in sealing performance, causing tiny gaps or cracks, thereby increasing the risk of leakage. In order to detect the influence of the gradually increasing physical wear on the sealing performance of the seal of the stern shaft 15, the specific operation is as follows: after completing the above-mentioned sealing test from turbid to clear, turn off the liquid pump 19, and then control the electric slide rail 21 to drive the first connecting frame 22 to move intermittently left and right, thereby driving the baffle 23 to move intermittently left and right, so that the mud and sand in the storage frame 2 intermittently fall into the water in the water tank 11, so that the liquid in the water tank 11 gradually changes from clear to turbid. The water quality changes from clear to turbid, which means that the mud and sand particles carried in the water gradually increase, thereby gradually increasing the wear degree of the seal of the stern shaft 15. Therefore, the present invention can detect the influence of the gradually increasing physical wear on the sealing performance of the seal of the stern shaft 15 by dynamically turbidizing the water quality. The dynamic test results performed at this time can better reflect the sealing state of the seal of the stern shaft 15 disturbed by mud and sand wear, and are also conducive to more accurate evaluation of the sealing performance.

[0045] Embodiment 2: Based on embodiment 1, Fig.10 and Fig.11 As shown, there are also two second connecting frames 31, which are fixedly connected to the first connecting frames 22 adjacent to the same side, and a liquid pushing plate frame 3 is fixedly connected between the two second connecting frames 31. The liquid pushing plate frame 3 swings back and forth to disturb the mixture of mud and water in the water tank 11. The liquid pushing plate frame 3 is located inside the water tank 11, and four telescopic rods 32 are fixedly connected between the liquid pushing plate frame 3 and the inner wall of the water tank 11.

[0046] The intermittent left and right movement of the first connecting frame 22 drives the liquid pushing plate frame 3 to move intermittently left and right, and the telescopic rod 32 is adaptively extended and retracted, so that the mixed liquid in the water tank 11 is disturbed, simulating the flow of the mixed liquid. At the same time, this flow situation can stir up the sediment and reduce the occurrence of sediment sinking to the bottom, thereby improving the authenticity and accuracy of the detection.

[0047] like Fig.12 and Fig.13 As shown, it also includes four support blocks 41, which are fixedly connected to the inner wall of the water tank 11, and a stirring frame 4 is rotatably connected between the four support blocks 41. The stirring frame 4 is provided with circumferentially distributed corrugated plates, which can stir the mixture of mud and water and increase the resistance. The stirring frame 4 is fixedly connected to one side close to the stern shaft 15 with four circumferentially distributed elastic ropes 42, and a stop block 43 is fixedly connected between the four elastic ropes 42, and the stop block 43 is frictionally matched with the right end of the stern shaft 15.

[0048] The right end of the stern shaft 15 abuts against the stop block 43. When the stern shaft 15 rotates, the friction force drives the stop block 43 to rotate, thereby driving the stirring frame 4 to rotate on the support block 41 through the elastic rope 42. When the stirring frame 4 rotates, it is affected by the liquid resistance, which causes the stern shaft 15 to be obstructed when rotating, simulating the situation that the stern shaft 15 is obstructed by being entangled in water plants during navigation, thereby further improving the authenticity and accuracy of the detection.

[0049] like Fig.14 and Fig.15 As shown, it also includes a third connecting frame 52 which is symmetrically distributed along the front and back of the liquid pushing plate frame 3. The third connecting frame 52 is fixedly connected to the lower part of the liquid pushing plate frame 3. The lower part of the third connecting frame 52 is rotatably connected to a connecting rod 51. The left inner wall of the water tank 11 is fixedly connected to a space cam 53 which is symmetrically distributed along the front and back of the water tank 11. The left end of the connecting rod 51 is fixedly connected to a protrusion 54, and the protrusion 54 is slidably connected to the adjacent space cam 53. The connecting rod 51 is fixedly connected to two disturbance blocks 5. The disturbance blocks 5 are provided with grooves which are symmetrically distributed along the upper and lower parts of the disturbance blocks 5 to facilitate stirring of the sediment at the bottom.

[0050] When the liquid pushing plate frame 3 moves intermittently left and right, it drives the third connecting frame 52 to move intermittently left and right, thereby driving the connecting rod 51 to move intermittently left and right, and then driving the disturbance block 5 and the protrusion 54 to move intermittently left and right. Under the action of the spatial cam 53, the protrusion 54 drives the connecting rod 51 to move intermittently left and right, and also rotates forward and reverse intermittently, thereby driving the disturbance block 5 to rotate forward and reverse intermittently, stirring up the sediment that has settled to the bottom on the front and rear sides, further reducing the occurrence of sediment sinking to the bottom, thereby further improving the authenticity and accuracy of the detection.

[0051] It should be understood that the above description is only for exemplary purposes and is not intended to limit the present invention. Those skilled in the art will appreciate that variations of the present invention will be included within the scope of the claims of the present invention.

Claims

1. A propeller stern sealing test device, comprising a water tank (11), one side of a mounting plate frame (1) being fixedly connected to the water tank (11), and the other side of the mounting plate frame (1) being fixedly connected to a motor (12) for driving a stern shaft (15) to rotate, characterized in that: A liquid level gauge (13) is installed on the outside of the water tank (11), and the liquid level gauge (13) is connected to the water tank (11) through a pipeline. A positioning flange (14) for sealing and placing the stern shaft (15) is fixedly connected to the side of the water tank (11) close to the motor (12), and the positioning flange (14) penetrates into the water tank (11). The pipeline on the liquid level gauge (13) passes through the positioning flange (14) and enters the water tank (11). A suction plate (16) is fixedly connected to the bottom of the water tank (11) in a through-type manner, and the suction plate (16) is connected to a suction pipe (17). A mounting tank body (18) is fixedly connected to the side of the water tank (11) away from the positioning flange (14). A liquid pump (19) is fixedly connected to one side of the mounting tank body (18); a liquid inlet of the liquid pump (19) is in communication with the mounting tank body (18) via a pipeline; a liquid outlet of the liquid pump (19) is in communication with a discharge pipe (110); a spray plate (111) is fixedly connected to the bottom of the water tank (11) in a through-type manner; the spray plate (111) is in communication with the discharge pipe (110); a conical filter plate (112) is fixedly connected to the upper portion of the mounting tank body (18); a conical collector (113) is fixedly connected to the lower portion of the mounting tank body (18); the conical collector (113) is used to collect sediment filtered by the conical filter plate (112); and the conical collector (113) is fixedly connected to the conical filter plate (112).

2. A propeller stern sealing test device as claimed in claim 1, characterized in that: The motor (12) is connected to the stern shaft (15) via a universal joint connecting plate.

3. A propeller stern sealing test device as claimed in claim 2, characterized in that: The positioning flange (14) and the stern shaft (15) are connected via a bearing.

4. A propeller stern sealing test device as claimed in claim 3, characterized in that: The invention also comprises a storage frame (2), the storage frame (2) being fixedly connected to a side of the water tank (11) close to the tank cover, the water tank (11) being fixedly connected to electric slide rails (21) symmetrically distributed along the water tank (11), first connecting frames (22) being slidably connected between the symmetrically distributed electric slide rails (21), and baffles (23) for blocking the outlet of the storage frame (2) being fixedly connected between all the first connecting frames (22).

5. A propeller stern sealing test device as claimed in claim 4, characterized in that: It also includes a second connecting frame (31) corresponding to the first connecting frame (22), the second connecting frame (31) being fixedly connected to the corresponding first connecting frame (22), and a liquid pushing plate frame (3) being fixedly connected between all the second connecting frames (31), the liquid pushing plate frame (3) being located inside the water tank (11).

6. A propeller stern sealing test device as claimed in claim 5, characterized in that: It also includes a plurality of telescopic rods (32), wherein the telescopic rods (32) are fixedly connected between the liquid pushing plate frame (3) and the inner wall of the water tank (11).

7. A propeller stern sealing test device as claimed in claim 6, characterized in that: It also comprises a plurality of support blocks (41), the support blocks (41) being fixedly connected to the inner wall of the water tank (11), a stirring frame (4) being rotatably connected between all the support blocks (41), a circumferentially distributed elastic rope (42) being fixedly connected to one side of the stirring frame (4) close to the stern shaft (15), a stop block (43) being fixedly connected between all the elastic ropes (42), and the stop block (43) being frictionally fitted with the end of the stern shaft (15).

8. A propeller stern sealing test device as claimed in claim 7, characterized in that: The stirring frame (4) is provided with circumferentially distributed corrugated plates.

9. A propeller stern sealing test device as claimed in claim 8, characterized in that: It also includes a third connecting frame (52) symmetrically distributed along the liquid pushing plate frame (3), the third connecting frame (52) is fixedly connected to the liquid pushing plate frame (3), the third connecting frame (52) is rotatably connected to a connecting rod (51), the inner wall of the water tank (11) is fixedly connected to a spatial cam (53) symmetrically distributed along the water tank (11), one end of the connecting rod (51) close to the adjacent spatial cam (53) is fixedly connected to a protrusion (54), the protrusion (54) is slidably connected to the adjacent spatial cam (53), and the connecting rod (51) is fixedly connected to at least two disturbance blocks (5).

10. A propeller stern sealing test device according to claim 9, characterized in that: The disturbance block (5) is provided with grooves which are symmetrically distributed along the disturbance block (5).

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