A test apparatus for a sealed device having a multi-stage test function

Abstract

This invention discloses a testing device for a sealing device with multi-level testing functions, relating to the technical field of testing devices. The sealing device under test is installed outside the bushing. A medium is input into the testing chamber through a circulation mechanism. Then, different speeds are tested through a speed adjustment mechanism. At the same time, a loading mechanism applies radial pressure to the sealing device under test to simulate the radial force experienced by the sealing device in actual operation. A heating tube is installed to heat the medium in the testing chamber. The output end of a second motor is connected to the drive shaft to drive the drive shaft to rotate. A stirring paddle is connected to the drive shaft to rotate, making the medium distribution in the testing chamber more uniform. When the stirring paddle rotates at low speed, turbulence is generated in the medium in the testing chamber, thereby more accurately simulating the complex flow characteristics of the medium under actual working conditions.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, specifically a testing device for a sealing device with multi-level testing functions. Background Technology

[0002] With the rapid development of modern industry, mechanical seals are increasingly widely used in many fields such as chemical, petroleum, pharmaceutical, and food processing. These industries have extremely high requirements for the safety, stability, and efficiency of their production processes. For example, in chemical production, many chemical reactions need to be carried out in high-temperature, high-pressure, and highly corrosive environments. Mechanical seals are used to seal shafts in equipment such as pumps, compressors, and reaction vessels to prevent media leakage. To ensure that these sealing devices can work reliably under complex and harsh operating conditions, high-precision testing equipment is needed to simulate actual operating conditions and conduct performance tests. Mechanical seal testing equipment is mainly used to evaluate the performance of mechanical seals under different operating conditions. It can simulate various working conditions, such as different media (liquid, gas, or gas-liquid mixtures), different pressures, temperatures, and rotational speeds, to conduct rigorous tests on the mechanical seals to determine their sealing performance, reliability, and service life.

[0003] Traditional testing equipment offers relatively simple testing methods for mechanical seals. In actual mechanical seal operating environments, the flow state of the medium is often complex and variable, not simply laminar flow. Moreover, traditional static pressure testing can only detect whether the sealing device leaks when it is under a certain pressure in a static state, and cannot simulate the dynamic environment of actual equipment operation. Furthermore, traditional testing methods are difficult to accurately simulate complex medium flow states, such as turbulent flow and gas-liquid two-phase flow commonly seen in actual industrial processes. These flow states have a significant impact on the performance of mechanical seals because different flow states will cause changes in factors such as pressure distribution and friction on the sealing surface, thereby affecting the sealing effect. Summary of the Invention

[0004] The purpose of this invention is to provide a testing device for sealing devices with multi-level testing functions, so as to solve the problems raised in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A testing device for a sealing device with multi-level testing functions is disclosed. The testing device includes a main shaft, a bushing, a sealing device under test, a test chamber, a loading mechanism, a speed adjustment mechanism, a support, a circulation mechanism, and a stirring mechanism. The inner ring of the bushing is fitted onto the main shaft. The sealing device under test is fastened to the bushing. The sealing device under test is fixedly connected to the test chamber. The test chamber is fixedly connected to the loading mechanism. The loading mechanism is fixedly connected to the sealing device under test. The test chamber is fixedly connected to the support. The speed adjustment mechanism is fixedly connected to the main shaft. The speed adjustment mechanism is fixedly connected to the support. The circulation mechanism is connected to the test chamber. The stirring mechanism is fixedly connected to the support. The stirring mechanism is rotatably connected to the test chamber.

[0007] The test sealing device is mounted on the main shaft by fitting an inner ring of a bushing, thus placing the test sealing device inside the test chamber. The test sealing device is a mechanical seal. By using bushings of different sizes, test sealing devices of different sizes can be installed. Through a circulation mechanism, the test chamber is filled with the sealing medium used by the test sealing device during operation to simulate the working environment of the test sealing device. Through a loading mechanism, radial pressure is applied to the test sealing device to test its sealing performance under different clamping forces. Through a speed adjustment mechanism, the main shaft speed can be adjusted in multiple stages to test the sealing performance of the test sealing device at different main shaft speeds. Through a stirring mechanism, the medium distribution in the test chamber is made more uniform, and the medium sedimentation, clumping, or local overheating is prevented, ensuring the accuracy and reliability of the test results. At the same time, it allows the medium to flow in the test chamber, making the test environment closer to the real working environment.

[0008] The test chamber includes a flange, a sleeve, an end cap, a heating tube, a pressure sensor, and a temperature sensor. The flange is fixedly connected to the sealing device under test. The sleeve has a test chamber. The flange and the sleeve are fixedly connected. The end cap has a leakage receiving chamber. The end cap and the flange are fixedly connected. The sleeve has an installation groove. The heating tube is placed in the installation groove. The pressure sensor and the sleeve are fixedly connected. The temperature sensor and the sleeve are fixedly connected.

[0009] A flange and sleeve are bolted together to form a sealed test chamber. An end cap and flange are bolted together to form a sealed leakage collection chamber to collect the medium leaking from the tested sealing device during testing. The sleeve has a mounting groove for installing a heating element, which heats the medium in the test chamber. A pressure sensor fixed to the sleeve detects the pressure inside the test chamber, thus detecting the pressure of the test environment. A temperature sensor fixed to the sleeve detects the temperature of the medium in the test chamber. Together with the heating element, the medium in the test chamber is heated to different temperatures to test the sealing performance of the sealing device at different temperatures, achieving multi-level temperature testing.

[0010] The loading mechanism includes a hydraulic cylinder and a pressure plate. The hydraulic cylinder is fixedly connected to the inner wall of the sleeve, the output end of the hydraulic cylinder is fixedly connected to the pressure plate, and the pressure plate abuts against the sealing device being tested.

[0011] A hydraulic cylinder fixed to the inner wall of the sleeve pushes a pressure plate, which in turn applies radial pressure to the sealing device under test. This simulates the radial force experienced by the sealing device during actual operation, making the test conditions closer to real working conditions and increasing the accuracy of the test.

[0012] The speed regulation mechanism includes a No. 1 motor and a gearbox. The No. 1 motor is fixedly connected to the bracket, the output end of the No. 1 motor is fixedly connected to the input end of the gearbox, and the output end of the gearbox is fixedly connected to the main shaft.

[0013] The No. 1 motor is fixedly connected to the bracket, enabling the No. 1 motor to operate stably. The No. 1 motor output end is connected to the gearbox input end, and the gearbox output end is connected to the main shaft, enabling the No. 1 motor to adjust the different speeds of the main shaft.

[0014] The circulation mechanism includes a filter, a multi-pipe connector, a solenoid valve, a storage tank, and an electric pump. The sleeve has an inlet, and the electric pump is connected to the inlet pipe. The sleeve also has an outlet, and the filter is connected to the outlet pipe. There are three storage tanks, and the three storage tanks are connected to the solenoid valve pipe. The multi-pipe connector is fixedly connected to the solenoid valve, the multi-pipe connector is connected to the filter pipe, and the electric pump is connected to the multi-pipe connector pipe.

[0015] The outlet on the sleeve is connected to the filter pipe, allowing the medium in the test chamber to flow into the filter. The filter removes impurities from the medium, and the filtered medium is then pumped back into the test chamber by an electric pump to prevent impurities from affecting the test results. A multi-pipe connector connects to storage tanks for different media, and the connection between the multi-pipe connector and the solenoid valve is controlled, allowing different media to be selected for testing according to the sealing device being tested.

[0016] The stirring mechanism includes a second motor, a drive shaft, and a stirring paddle. The second motor is fixedly connected to the bracket, the output end of the second motor is fixedly connected to the drive shaft, the drive shaft is rotatably connected to the sleeve, and the stirring paddle is fixedly connected to the drive shaft.

[0017] The output of motor No. 2 is connected to the drive shaft, which drives the drive shaft to rotate. The stirring paddle is connected to the drive shaft, causing the stirring paddle to rotate, thereby agitating the medium in the test chamber. This makes the medium distribution more uniform and prevents the medium from settling or clumping in the test chamber. At the same time, it avoids local overheating of the heating tube during the heating process, ensuring the accuracy and reliability of the test results.

[0018] The stirring blades of the impeller are frustums, with the smaller base of the frustum closer to the drive shaft than the larger base. The sides of the frustum have several protrusions of varying sizes, which are distributed irregularly.

[0019] By designing the stirring blades of the agitator as a frustum, with the smaller base of the frustum closer to the drive shaft 92 than the larger base, the medium distribution within the test chamber is made more uniform when the agitator rotates at high speed. When the agitator rotates at low speed, turbulence is generated within the test chamber. Several protrusions are provided on the side of the frustum, with some protrusions of different sizes and some distributed irregularly. Due to the irregular distribution and size differences of the protrusions, the agitator can fully stir and mix the medium in all directions during rotation, avoiding problems such as poor local medium flow or uneven mixing. This ensures that the medium in the chamber can achieve a more uniform distribution under turbulent conditions, thereby more accurately simulating the complex flow characteristics of the medium under actual working conditions.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The testing equipment is equipped with a stirring mechanism, and the stirring blades of the stirring paddle are set as a frustum. The side of the frustum has several protrusions of different sizes and are randomly distributed. Due to the irregular distribution and size difference of the protrusions, the medium in the test chamber can be more evenly distributed when the stirring paddle rotates at high speed. When the stirring paddle rotates at low speed, the medium in the test chamber is turbulent, which ensures that the medium in the chamber can be more evenly distributed under turbulent conditions, thereby more accurately simulating the complex flow characteristics of the medium under actual working conditions.

[0022] 2. The speed adjustment mechanism can simulate the working conditions of the mechanical seal at different speeds. By setting different speed parameters in the testing equipment, low-speed or high-speed tests can be conducted to truly reflect the sealing performance and working status of the mechanical seal at different rotation speeds, thereby ensuring that the mechanical seal can work reliably in various practical application scenarios.

[0023] 3. Apply radial pressure to the sealing device under test through the pressure plate of the loading mechanism to simulate the radial force that the sealing device under test bears in actual operation, so that the test conditions are closer to the real working conditions and increase the accuracy of the test.

[0024] 4. The multi-pipe connector of the circulation mechanism connects to storage tanks containing different media, and the connection between the multi-pipe connector is controlled by a solenoid valve. This allows for the selection of different media for testing based on the sealing device being tested. Impurities in the media are filtered out by a filter, and the filtered media is then pumped back into the test chamber by an electric pump to prevent impurities in the media from affecting the test results. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the test chamber structure of the present invention;

[0027] Figure 3 yes Figure 2 A magnified view of part A;

[0028] Figure 4 This is a schematic diagram of the pressure sensor connection of the present invention;

[0029] Figure 5 This is a schematic diagram of the circulation mechanism structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the frustum structure of the present invention.

[0031] In the diagram: 1. Main shaft; 2. Bushing; 3. Tested sealing device; 4. Test chamber; 41. Flange; 42. Sleeve; 421. Test cavity; 422. Mounting groove; 423. Inlet; 424. Outlet; 43. End cap; 431. Leakage inlet; 44. Heating tube; 45. Pressure sensor; 46. Temperature sensor; 5. Loading mechanism; 51. Hydraulic cylinder; 52. Pressure plate; 6. Speed ​​adjustment mechanism; 61. Motor 1; 62. Gearbox; 7. Bracket; 8. Circulation mechanism; 81. Filter; 82. Multi-pipe connector; 83. Solenoid valve; 84. Liquid storage tank; 85. Electric pump; 9. Stirring mechanism; 91. Motor 2; 92. Drive shaft; 93. Stirring paddle; 931. Frustum. Detailed Implementation

[0032] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example: Figure 1 As shown, the present invention provides a technical solution for a testing device for a sealing device with multi-level testing functions. The testing device includes a main shaft 1, a bushing 2, a sealing device under test 3, a testing chamber 4, a loading mechanism 5, a speed adjustment mechanism 6, a support 7, a circulation mechanism 8, and a stirring mechanism 9. The inner ring of the bushing 2 is fitted onto the main shaft 1. The sealing device under test 3 and the bushing 2 are fastened together. The sealing device under test 3 and the testing chamber 4 are fixedly connected. The testing chamber 4 and the loading mechanism 5 are fixedly connected. The loading mechanism 5 and the sealing device under test 3 are fixedly connected. The testing chamber 4 and the support 7 are fixedly connected. The speed adjustment mechanism 6 and the main shaft 1 are fixedly connected. The speed adjustment mechanism 6 and the support 7 are fixedly connected. The circulation mechanism 8 is connected to the testing chamber 4. The stirring mechanism 9 is fixedly connected to the support 7 and rotatably connected to the testing chamber 4.

[0034] The inner ring of the bushing 2 is fitted onto the main shaft 1, allowing the tested sealing device 3 to be installed on the bushing 2, thus placing the tested sealing device 3 inside the test chamber 4. The tested sealing device 3 is a mechanical seal. By using bushings 2 of different sizes, tested sealing devices 3 of different sizes can be installed. The test chamber 4 is fixed by the bracket 7. The circulation mechanism 8 fills the test chamber 4 with the sealing medium used when the tested sealing device 3 is working, simulating the working environment of the tested sealing device 3. The loading mechanism 5 applies radial pressure to the tested sealing device 3 to test the sealing performance of the sealing device under different clamping forces. The speed adjustment mechanism 6 enables multi-level adjustment of the speed of the main shaft 1, testing the sealing performance of the sealing device at different speeds of the main shaft 1. The stirring mechanism 9 makes the medium distribution in the test chamber 4 more uniform and prevents medium sedimentation, clumping, or local overheating, ensuring the accuracy and reliability of the test results. At the same time, it allows the medium to flow in the test chamber 4, making the test environment closer to the real working environment.

[0035] The test chamber 4 includes a flange 41, a sleeve 42, an end cap 43, a heating tube 44, a pressure sensor 45, and a temperature sensor 46. The flange 41 is fixedly connected to the sealing device 3 under test. The sleeve 42 is provided with a test chamber 421. The flange 41 and the sleeve 42 are fixedly connected. The end cap 43 is provided with a leakage receiving chamber 431. The end cap 43 and the flange 41 are fixedly connected. The sleeve 42 is provided with a mounting groove 422. The heating tube 44 is placed in the mounting groove 422. The pressure sensor 45 and the sleeve 42 are fixedly connected. The temperature sensor 46 and the sleeve 42 are fixedly connected.

[0036] A sealed test chamber 421 is formed between flange 41 and sleeve 42 by bolts. An end cap 43 is also formed between flange 41 and end cap 43 by bolts, creating a sealed leakage collection chamber 431 to collect the medium leaked from the test chamber 421 during the test. A mounting groove 422 is provided on sleeve 42 for mounting a heating tube 44, which heats the medium in the test chamber 421. A pressure sensor 45 fixed on sleeve 42 detects the pressure in the test chamber 421, thus detecting the pressure of the test environment. A temperature sensor 46 fixed on sleeve 42 detects the temperature of the medium in the test chamber 421. In conjunction with the heating tube 44, the medium in the test chamber 421 is heated to different temperatures to test the sealing performance of the sealing device at different temperatures, achieving multi-level temperature testing.

[0037] The loading mechanism 5 includes a hydraulic cylinder 51 and a pressure plate 52. The hydraulic cylinder 51 is fixedly connected to the inner wall of the sleeve 42. The output end of the hydraulic cylinder 51 is fixedly connected to the pressure plate 52. The pressure plate 52 abuts against the sealing device 3 being tested.

[0038] By using a hydraulic cylinder 51 fixed to the inner wall of the sleeve 42, the hydraulic cylinder 51 pushes the pressure plate 52, thereby applying radial pressure to the sealing device 3 under test, simulating the radial force borne by the sealing device 3 in actual operation, making the test conditions closer to real working conditions, and increasing the accuracy of the test.

[0039] The speed adjustment mechanism 6 includes a primary motor 61 and a gearbox 62. The primary motor 61 is fixedly connected to the bracket 7. The output end of the primary motor 61 is fixedly connected to the input end of the gearbox 62. The output end of the gearbox 62 is fixedly connected to the main shaft 1.

[0040] The first motor 61 is fixedly connected to the bracket 7, enabling the first motor 61 to operate stably. The output end of the first motor 61 is connected to the input end of the gearbox 62, and the output end of the gearbox 62 is connected to the main shaft 1, so that the first motor 61 can adjust the different speeds of the main shaft 1.

[0041] The circulation mechanism 8 includes a filter 81, a multi-pipe connector 82, a solenoid valve 83, a storage tank 84, and an electric pump 85. The sleeve 42 is provided with an inlet 423, and the electric pump 85 is connected to the inlet 423 by a pipe. The sleeve 42 is provided with an outlet 424, and the filter 81 is connected to the outlet 424 by a pipe. There are three storage tanks 84, and the three storage tanks 84 are connected to the solenoid valve 83 by pipe. The multi-pipe connector 82 is fixedly connected to the solenoid valve 83, the multi-pipe connector 82 is connected to the filter 81 by pipe, and the electric pump 85 is connected to the multi-pipe connector 82 by pipe.

[0042] The outlet 424 on the sleeve 42 is connected to the filter 81 via a pipeline, allowing the medium in the test chamber 421 to flow into the filter 81. The filter 81 filters out impurities in the medium, and the filtered medium is then pumped back into the test chamber 421 by an electric pump 85 to prevent impurities from affecting the test results. A multi-pipe connector 82 is connected to a storage tank 84 for storing different media, and the connection between the multi-pipe connector 84 and the solenoid valve 83 is controlled to allow different media to be selected for testing according to the sealing device 3 being tested.

[0043] The stirring mechanism 9 includes a second motor 91, a drive shaft 92, and a stirring paddle 93. The second motor 91 is fixedly connected to the bracket 7, the output end of the second motor 91 is fixedly connected to the drive shaft 92, the drive shaft 92 is rotatably connected to the sleeve 42, and the stirring paddle 93 is fixedly connected to the drive shaft 92.

[0044] The output of motor 91 is connected to the drive shaft 92, which drives the drive shaft 92 to rotate. The stirring paddle 93 is connected to the drive shaft 92, which causes the stirring paddle 93 to rotate, thereby agitating the medium in the test chamber 421, making the medium distribution more uniform, preventing the medium from settling or clumping in the test chamber 421, and avoiding local overheating of the heating tube 44 during the heating process, thus ensuring the accuracy and reliability of the test results.

[0045] The stirring blade of the stirring paddle 93 is a frustum 931. The smaller bottom surface of the frustum 931 is closer to the drive shaft 92 than the larger bottom surface. The frustum 931 has several protrusions on its side. The protrusions are of different sizes and are distributed irregularly.

[0046] By setting the stirring blades of the stirring paddle 93 as a frustum 931, with the smaller base of the frustum 931 closer to the drive shaft 92 than the larger base, the medium distribution within the test chamber 421 can be more uniform when the stirring paddle 93 rotates at high speed. When the stirring paddle 93 rotates at low speed, turbulence is generated in the medium within the test chamber 421. The frustum 931 has several protrusions on its side, which are of different sizes and randomly distributed. Due to the irregular distribution and size differences of the protrusions, the stirring paddle 93 can fully stir and mix the medium in all directions during rotation, avoiding problems such as poor local medium flow or uneven mixing. This ensures that the medium in the chamber can achieve a more uniform distribution under turbulent conditions, thereby more accurately simulating the complex flow characteristics of the medium under actual working conditions.

[0047] Working principle: The sealing device 3 under test is installed on the bushing 2. It is bolted together with the flange 41 and the sleeve 42, forming a sealed test chamber 421 between them. The end cap 43 is bolted together with the flange 41, forming a sealed leakage collection chamber 431 between them. This chamber collects the medium leaking from the sealing device 3 during testing. The medium is introduced into the test chamber 421 through the circulation mechanism 8. Different speeds are tested using the speed adjustment mechanism 6. Radial pressure is applied to the sealing device 3 through the loading mechanism 5, simulating the radial force experienced by the sealing device 3 during actual operation. The sleeve 42 has an installation groove 422 for installing the heating tube 44, allowing the heating tube 44 to apply pressure to the test... The medium inside the test chamber 421 is heated by connecting the output end of motor 91 to the drive shaft 92, which drives the drive shaft 92 to rotate. The drive shaft 92 is connected to the stirring paddle 93, which rotates the stirring paddle 93. By setting the stirring blade of the stirring paddle 93 as a frustum 931, with the bottom surface of the frustum 931 close to the drive shaft 92, the medium inside the test chamber 421 can be more evenly distributed when the stirring paddle 93 rotates at high speed. When the stirring paddle 93 rotates at low speed, the medium inside the test chamber 421 is turbulent. The frustum 931 has several protrusions on its side. The protrusions are of different sizes and are randomly distributed. Due to the random distribution and size difference of the protrusions, the medium inside the chamber can be more evenly distributed under turbulent conditions, thereby more accurately simulating the complex flow characteristics of the medium under actual working conditions.

[0048] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A testing device for a sealing device with multi-level testing functions, characterized in that: The testing equipment includes a main shaft (1), a bushing (2), a sealing device under test (3), a test chamber (4), a loading mechanism (5), a speed adjustment mechanism (6), a bracket (7), a circulation mechanism (8), and a stirring mechanism (9). The inner ring of the bushing (2) is fitted on the main shaft (1). The sealing device under test (3) and the bushing (2) are fastened together. The sealing device under test (3) and the test chamber (4) are fixedly connected. The test chamber (4) and the loading mechanism (5) are fixedly connected. The loading mechanism (5) and the sealing device under test (3) are fixedly connected. The test chamber (4) and the bracket (7) are fixedly connected. The speed adjustment mechanism (6) and the main shaft (1) are fixedly connected. The speed adjustment mechanism (6) and the bracket (7) are fixedly connected. The circulation mechanism (8) and the test chamber (4) are connected. The stirring mechanism (9) and the bracket (7) are fixedly connected. The stirring mechanism (9) and the test chamber (4) are rotatably connected. The test chamber (4) includes a flange (41), a sleeve (42), an end cap (43), a heating tube (44), a pressure sensor (45), and a temperature sensor (46). The flange (41) is fixedly connected to the sealing device (3) under test. The sleeve (42) is provided with a test chamber (421). The flange (41) and the sleeve (42) are fixedly connected, and a sealed test chamber (421) is formed between the flange (41) and the sleeve (42). The end cap (43) is provided with a leakage receiving chamber (431). The end cap (43) and the flange (41) are fixedly connected, and a sealed leakage receiving chamber (431) is formed between the end cap (43) and the flange (41). The sleeve (42) is provided with an installation groove (422). The heating tube (44) is placed in the installation groove (422). The pressure sensor (45) is fixedly connected to the sleeve (42). The temperature sensor (46) is fixedly connected to the sleeve (42). The medium is introduced into the test chamber (421) through the circulation mechanism (8). The test sealing device (3) is a mechanical seal. Radial pressure is applied to the test sealing device (3) through the loading mechanism (5). The medium in the test chamber (421) is stirred by the stirring mechanism (9). The loading mechanism (5) includes a hydraulic cylinder (51) and a pressure plate (52). The hydraulic cylinder (51) is fixedly connected to the inner wall of the sleeve (42). The output end of the hydraulic cylinder (51) is fixedly connected to the pressure plate (52). The pressure plate (52) abuts against the sealing device (3) being tested.

2. The testing equipment for a sealing device with multi-level testing function according to claim 1, characterized in that: The speed adjustment mechanism (6) includes a first motor (61) and a gearbox (62). The first motor (61) is fixedly connected to the bracket (7). The output end of the first motor (61) is fixedly connected to the input end of the gearbox (62). The output end of the gearbox (62) is fixedly connected to the main shaft (1).

3. The testing equipment for a sealing device with multi-level testing function according to claim 2, characterized in that: The circulation mechanism (8) includes a filter (81), a multi-pipe connector (82), a solenoid valve (83), a storage tank (84), and an electric pump (85). The sleeve (42) is provided with an inlet (423), and the electric pump (85) is connected to the inlet (423) by a pipe. The sleeve (42) is provided with an outlet (424), and the filter (81) is connected to the outlet (424) by a pipe. There are three storage tanks (84), and the three storage tanks (84) are connected to the solenoid valve (83) by a pipe. The multi-pipe connector (82) is fixedly connected to the solenoid valve (83). The multi-pipe connector (82) is connected to the filter (81) by a pipe. The electric pump (85) is connected to the multi-pipe connector (82) by a pipe.

4. The testing equipment for a sealing device with multi-level testing function according to claim 3, characterized in that: The stirring mechanism (9) includes a second motor (91), a drive shaft (92) and a stirring paddle (93). The second motor (91) is fixedly connected to the bracket (7). The output end of the second motor (91) is fixedly connected to the drive shaft (92). The drive shaft (92) is rotatably connected to the sleeve (42). The stirring paddle (93) is fixedly connected to the drive shaft (92).

5. A testing device for a sealing device with multi-level testing function according to claim 4, characterized in that: The stirring blade of the stirring paddle (93) is a frustum (931). The smaller bottom surface of the frustum (931) is closer to the drive shaft (92) than the larger bottom surface. The frustum (931) has several protrusions on its side. The size of the protrusions is different and the protrusions are randomly distributed.

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