Testing equipment with multi-stage testing function for sealing device

Abstract

The invention discloses testing equipment with a multi-stage testing function for a sealing device, and relates to the technical field of testing devices.A tested sealing device is installed outside a shaft sleeve, a medium is input into a testing cavity through a circulating mechanism, then testing of different rotating speeds is conducted through a rotating speed adjusting mechanism, and meanwhile a loading mechanism is used for loading the sealing device. Radial pressure is applied to the tested sealing device, radial force borne by the tested sealing device in actual operation is simulated, a heating pipe is installed to heat a medium in a testing cavity, the output end of a second motor is connected with a transmission shaft to drive the transmission shaft to rotate, and a stirring paddle is connected with the transmission shaft to rotate to drive the sealing device to be tested; when the stirring paddle rotates at a low speed, the medium in the test cavity generates turbulent flow, so that the complex flow characteristic of the medium under the actual working condition is simulated more accurately.

Description

Technical Field

[0001] The invention relates to the technical field of testing devices, in particular to a testing device for a sealing device with a multi-stage testing function. Background Art

[0002] With the rapid development of modern industry, mechanical seals are increasingly used in many fields such as chemical, petroleum, pharmaceutical, food processing and other industries. These industries have extremely high requirements for the safety, stability and efficiency of the production process. 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 the shaft seals in equipment such as pumps, compressors, reactors, etc. to prevent medium leakage. In order to ensure that these seals can work reliably under complex and harsh working conditions, high-precision test equipment is required to simulate actual working conditions for performance testing. The test equipment for mechanical seals is mainly used to evaluate the performance of mechanical seals under different working conditions. It can simulate various working conditions, such as different medium liquids, gases or gas-liquid mixtures, different pressures, temperatures, speeds, etc., and conduct strict tests on mechanical seals to determine their sealing performance, reliability and service life.

[0003] Traditional testing equipment has relatively simple testing methods for mechanical sealing devices. In the actual use environment of mechanical seals, the flow state of the medium is often complex and changeable, not a simple laminar flow. In addition, traditional static pressure testing can only detect whether the sealing device leaks when it is subjected to a certain pressure in a static state, and cannot simulate the dynamic environment of actual equipment operation. Moreover, traditional testing methods are difficult to accurately simulate complex medium flow states, such as turbulence and gas-liquid two-phase flow that are common in actual industrial processes. These flow states have an important 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 object of the present invention is to provide a testing device for a sealing device with a multi-stage testing function to solve the problems raised in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A test device for a sealing device with a multi-stage testing function, the test device comprising a main shaft, a sleeve, a sealing device to be tested, a test chamber, a loading mechanism, a speed regulating mechanism, a bracket, a circulation mechanism and a stirring mechanism, the inner ring of the sleeve is arranged on the main shaft, the sealing device to be tested and the sleeve are tightly connected, the sealing device to be tested and the test chamber are fixedly connected, the test chamber and the loading mechanism are fixedly connected, the loading mechanism and the sealing device to be tested are fixedly connected, the test chamber and the bracket are fixedly connected, the speed regulating mechanism and the main shaft are fixedly connected, the speed regulating mechanism and the bracket are fixedly connected, the circulation mechanism and the test chamber are communicated, the stirring mechanism and the bracket are fixedly connected, and the stirring mechanism and the test chamber are rotatably connected.

[0007] The inner ring of the sleeve is mounted on the main shaft, so that the sealing device to be tested is installed on the sleeve, so that the sealing device to be tested is placed in the test chamber. The sealing device to be tested is a mechanical seal. By using sleeves of different sizes, sealing devices of different sizes to be tested can be installed. The sealing medium of the sealing device to be tested is filled into the test chamber through the circulation mechanism to simulate the working environment of the sealing device to be tested. The radial pressure is applied to the sealing device to be tested through the loading mechanism to test the sealing condition of the sealing device under different clamping forces. The multi-stage adjustment of the main shaft speed is achieved through the speed adjustment mechanism to test the sealing condition of the sealing device of the main shaft at different speeds. The medium distribution in the test chamber is made more uniform through the stirring mechanism to prevent the medium from settling, agglomerating or locally overheating, thereby ensuring the accuracy and reliability of the test results. At the same time, the medium can flow in the test chamber to make the test environment closer to the real working environment.

[0008] The test chamber includes a flange, a sleeve, an end cover, a heating tube, a pressure sensor and a temperature sensor. The flange is fixedly connected to the sealing device to be tested, the sleeve is provided with a test cavity, the flange and the sleeve are fixedly connected, the end cover is provided with a leak connection cavity, the end cover and the flange are fixedly connected, the sleeve is provided with a mounting groove, the heating tube is placed in the mounting groove, the pressure sensor and the sleeve are fixedly connected, and the temperature sensor and the sleeve are fixedly connected.

[0009] The flange and the sleeve are fixedly connected by bolts to form a sealed test chamber between the flange and the sleeve; the end cover and the flange are fixedly connected by bolts to form a sealed leakage chamber between the end cover and the flange to collect the medium in the test chamber leaked from the tested sealing device during the test; the sleeve is provided with a mounting groove for installing a heating tube so that the heating tube heats the medium in the test chamber; the pressure in the test chamber is detected by a pressure sensor fixed on the sleeve, thereby detecting the pressure of the test environment; the temperature of the medium in the test chamber is detected by a temperature sensor fixed on the sleeve; the medium in the test chamber is heated to different temperatures in conjunction with the heating tube to test the sealing performance of the sealing device at different temperatures, thereby realizing multi-stage temperature testing.

[0010] The loading mechanism comprises a hydraulic cylinder and a pressing 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 pressing plate, and the pressing plate abuts against the tested sealing device.

[0011] The hydraulic cylinder fixed on the inner wall of the sleeve pushes the pressure plate, so that the pressure plate applies radial pressure to the tested sealing device, simulating the radial force borne by the tested sealing device in actual operation, making the test conditions closer to the actual working conditions and increasing the accuracy of the test.

[0012] The speed regulating mechanism comprises a No. 1 motor and a transmission, wherein the No. 1 motor and a bracket are fixedly connected, an output end of the No. 1 motor and an input end of the transmission are fixedly connected, and an output end of the transmission and a main shaft are fixedly connected.

[0013] By fixing the No. 1 motor with the bracket, the No. 1 motor can run stably, and by connecting the output end of the No. 1 motor with the input end of the transmission, and the output end of the transmission with the main shaft, the No. 1 motor can adjust the different speeds of the main shaft.

[0014] The circulation mechanism includes a filter, a multi-tube joint, a solenoid valve, a liquid storage tank and an electric pump. The sleeve is provided with an input port, the electric pump is connected to the input port by a pipeline, the sleeve is provided with an output port, the filter is connected to the output port by a pipeline, three liquid storage tanks are provided, the three liquid storage tanks are connected to the solenoid valve pipeline, the multi-tube joint is fixedly connected to the solenoid valve, the multi-tube joint is connected to the filter pipeline, and the electric pump is connected to the multi-tube joint pipeline.

[0015] The output port provided on the sleeve is connected with the filter pipe, so that the medium in the test chamber flows into the filter through the pipe, and the impurities in the medium are filtered out by the filter. The filtered medium is transported back to the test chamber through the electric pump to avoid the presence of impurities in the medium and affecting the test results. The liquid storage tanks storing different media are connected through the multi-tube joint, and the connection with the multi-tube joint is controlled by the solenoid valve, so that different media can be selected for testing according to the sealing device to be tested.

[0016] The stirring mechanism includes a No. 2 motor, a transmission shaft and a stirring paddle. The No. 2 motor is fixedly connected to the bracket, the output end of the No. 2 motor is fixedly connected to the transmission shaft, the transmission shaft is rotationally connected to the sleeve, and the stirring paddle is fixedly connected to the transmission shaft.

[0017] The output end of the second motor is connected to the transmission shaft to drive the transmission shaft to rotate, and the stirring paddle is connected to the transmission shaft to rotate, thereby stirring the medium in the test chamber to make the medium distribution more uniform and prevent the medium from settling and agglomerating 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 blade of the stirring paddle is a frustum, the small bottom surface of the frustum is closer to the transmission shaft than the large bottom surface, and a plurality of protrusions are arranged on the side surface of the frustum, the sizes of the plurality of protrusions are inconsistent, and the plurality of protrusions are irregularly distributed.

[0019] By setting the stirring blade of the stirring paddle as a truncated cone, the small bottom surface of the truncated cone is closer to the transmission shaft 92 than the large bottom surface, so that when the stirring paddle rotates at a high speed, the medium in the test chamber can be distributed more evenly, and when the stirring paddle rotates at a low speed, the medium in the test chamber will generate turbulence. A plurality of protrusions are provided on the side of the truncated cone, and the sizes of the protrusions are inconsistent, and the protrusions are randomly distributed. Due to the irregular distribution and size differences of the protrusions, the stirring paddle can fully stir and mix the medium in all directions during the rotation process, avoiding the problem of poor local medium flow or uneven mixing, and ensuring that the medium in the chamber can achieve a more uniform distribution in the turbulent state, thereby more accurately simulating the complex flow characteristics of the medium under actual working conditions.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The test equipment is provided with a stirring mechanism, and the stirring blade of the stirring paddle is set as a frustum, and a number of protrusions are provided on the side of the frustum, and the sizes of the protrusions are inconsistent, and the protrusions are irregularly distributed. Due to the irregular distribution and size differences of the protrusions, when the stirring paddle rotates at a high speed, the medium in the test chamber can be distributed more evenly, and when the stirring paddle rotates at a low speed, turbulence is generated in the medium in the test chamber, and at the same time, it is ensured that the medium in the chamber can be more evenly distributed in the turbulent state, 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 test equipment and performing low-speed or high-speed tests, the sealing performance and working conditions of the mechanical seal at different rotation speeds can be truly reflected, thereby ensuring that the mechanical seal can work reliably in various practical application scenarios.

[0023] 3. Apply radial pressure to the tested sealing device through the pressure plate of the loading mechanism to simulate the radial force borne by the tested sealing device in actual operation, so as to make the test conditions closer to the actual working conditions and increase the accuracy of the test.

[0024] 4. Through the circulation mechanism, the multi-tube joint is connected to the liquid storage tanks storing different media, and the solenoid valve is used to control the connection with the multi-tube joint, so that different media can be selected for testing according to the sealing device to be tested, and the impurities in the medium are filtered out through the filter. The filtered medium is transported back to the test chamber through the electric pump to avoid impurities in the medium that affect the test results. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

[0030] Figure 6 It is a schematic diagram of the truncated cone structure of the present invention.

[0031] In the figure: 1. spindle; 2. bushing; 3. tested sealing device; 4. test chamber; 41. flange; 42. sleeve; 421. test chamber; 422. mounting groove; 423. input port; 424. output port; 43. end cover; 431. leakage chamber; 44. heating tube; 45. pressure sensor; 46. temperature sensor; 5. loading mechanism; 51. hydraulic cylinder; 52. pressing plate; 6. speed regulating mechanism; 61. No. 1 motor; 62. transmission; 7. bracket; 8. circulation mechanism; 81. filter; 82. multi-tube joint; 83. solenoid valve; 84. liquid storage tank; 85. electric pump; 9. stirring mechanism; 91. No. 2 motor; 92. transmission shaft; 93. stirring paddle; 931. round table. DETAILED DESCRIPTION

[0032] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0033] Example: Figure 1 As shown, the present invention provides a technical solution for testing equipment for a sealing device with a multi-stage testing function, a testing equipment for a sealing device with a multi-stage testing function, the testing equipment comprising a main shaft 1, a sleeve 2, a sealing device to be tested 3, a testing chamber 4, a loading mechanism 5, a speed regulating mechanism 6, a bracket 7, a circulation mechanism 8 and a stirring mechanism 9, the inner ring of the sleeve 2 is sleeved on the main shaft 1, the sealing device to be tested 3 and the sleeve 2 are fastened together, the sealing device to be tested 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 to be tested 3 are fixedly connected, the testing chamber 4 and the bracket 7 are fixedly connected, the speed regulating mechanism 6 and the main shaft 1 are fixedly connected, the speed regulating mechanism 6 and the bracket 7 are fixedly connected, the circulation mechanism 8 and the testing chamber 4 are connected, the stirring mechanism 9 and the bracket 7 are fixedly connected, and the stirring mechanism 9 and the testing chamber 4 are rotationally connected.

[0034] The inner ring of the sleeve 2 is sleeved on the main shaft 1, so that the tested sealing device 3 is installed on the sleeve 2, so that the tested sealing device 3 is placed in the test chamber 4. The tested sealing device 3 is a mechanical seal. By using sleeves 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 sealing medium of the tested sealing device 3 when working is filled into the test chamber 4 through the circulation mechanism 8 to simulate the working environment of the tested sealing device 3. The radial pressure is applied to the tested sealing device 3 through the loading mechanism 5 to test the sealing condition of the sealing device under different pressing forces. The multi-stage adjustment of the rotation speed of the main shaft 1 is realized through the speed adjustment mechanism 6 to test the sealing condition of the sealing device of the main shaft 1 at different rotation speeds. The medium distribution in the test chamber 4 is made more uniform through the stirring mechanism 9, and the medium is prevented from precipitation, agglomeration or local overheating, so as to ensure the accuracy and reliability of the test results. At the same time, the medium can flow in the test chamber 4 to make the test environment closer to the real working environment.

[0035] The test chamber 4 includes a flange 41, a sleeve 42, an end cover 43, a heating tube 44, a pressure sensor 45 and a temperature sensor 46. The flange 41 is fixedly connected to the tested sealing device 3, the sleeve 42 is provided with a test cavity 421, the flange 41 and the sleeve 42 are fixedly connected, the end cover 43 is provided with a leakage connection cavity 431, the end cover 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, and the temperature sensor 46 and the sleeve 42 are fixedly connected.

[0036] The flange 41 and the sleeve 42 are fixedly connected by bolts to form a sealed test chamber 421 between the flange 41 and the sleeve 42. The end cover 43 and the flange 41 are fixedly connected by bolts to form a sealed leakage chamber 431 between the end cover 43 and the flange 41 to collect the medium in the test chamber 421 leaked from the tested sealing device 3 during the test. The sleeve 42 is provided with a mounting groove 422 for mounting a heating tube 44 so that the heating tube 44 heats the medium in the test chamber 421. The pressure in the test chamber 421 is detected by a pressure sensor 45 fixed on the sleeve 42, thereby detecting the pressure of the test environment. The temperature of the medium in the test chamber 421 is detected by a temperature sensor 46 fixed on the sleeve 42. The medium in the test chamber 421 is heated to different temperatures in cooperation with the heating tube 44 to test the sealing performance of the sealing device at different temperatures and realize multi-stage 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 tested sealing device 3 .

[0038] By means of the hydraulic cylinder 51 fixed on the inner wall of the sleeve 42, the hydraulic cylinder 51 pushes the pressure plate 52, so that the pressure plate 52 applies radial pressure to the tested sealing device 3, simulating the radial force borne by the tested sealing device 3 in actual operation, making the test conditions closer to the actual working conditions and increasing the accuracy of the test.

[0039] The speed regulating mechanism 6 includes a No. 1 motor 61 and a transmission 62 . The No. 1 motor 61 is fixedly connected to the bracket 7 . The output end of the No. 1 motor 61 is fixedly connected to the input end of the transmission 62 . The output end of the transmission 62 is fixedly connected to the main shaft 1 .

[0040] By fixing the No. 1 motor 61 and the bracket 7, the No. 1 motor 61 can run stably, and by connecting the output end of the No. 1 motor 61 and the input end of the transmission 62, and the output end of the transmission 62 and the main shaft 1, the No. 1 motor 61 can adjust the different speeds of the main shaft 1.

[0041] The circulation mechanism 8 includes a filter 81, a multi-tube joint 82, a solenoid valve 83, a liquid storage tank 84 and an electric pump 85. The sleeve 42 is provided with an input port 423, and the electric pump 85 is connected to the input port 423 by a pipeline. The sleeve 42 is provided with an output port 424, and the filter 81 is connected to the output port 424 by a pipeline. There are three liquid storage tanks 84, and the three liquid storage tanks 84 are connected to the solenoid valve 83 by pipeline. The multi-tube joint 82 is fixedly connected to the solenoid valve 83, the multi-tube joint 82 is connected to the filter 81 by pipeline, and the electric pump 85 is connected to the multi-tube joint 82 by pipeline.

[0042] Through the output port 424 provided on the sleeve 42, the output port 424 is connected to the filter 81 through a pipeline, so that the medium in the test chamber 421 flows into the filter 81 through the pipeline, and the impurities in the medium are filtered out by the filter 81. The filtered medium is re-transported back to the test chamber 421 through the electric pump 85 to avoid the presence of impurities in the medium and affect the test results. Through the multi-tube joint 82, a liquid storage tank 84 storing different media is connected, and the connection with the multi-tube joint 82 is controlled by the solenoid valve 83, so that different media can be selected for testing according to the sealing device 3 to be tested.

[0043] The stirring mechanism 9 includes a No. 2 motor 91, a transmission shaft 92 and a stirring paddle 93. The No. 2 motor 91 is fixedly connected to the bracket 7, the output end of the No. 2 motor 91 is fixedly connected to the transmission shaft 92, the transmission shaft 92 is rotatably connected to the sleeve 42, and the stirring paddle 93 is fixedly connected to the transmission shaft 92.

[0044] The output end of the second motor 91 is connected to the transmission shaft 92 to drive the transmission shaft 92 to rotate, and the stirring paddle 93 is connected to the transmission shaft 92 to rotate the stirring paddle 93, thereby stirring the medium in the test chamber 421 to make the medium distribution more uniform, and prevent the medium from settling and agglomerating in the test chamber 421, while avoiding local overheating of the heating tube 44 during the heating process, thereby ensuring the accuracy and reliability of the test results.

[0045] The stirring blade of the stirring paddle 93 is a truncated cone 931 , the small bottom surface of the truncated cone 931 is closer to the transmission shaft 92 than the large bottom surface, and a plurality of protrusions are arranged on the side surface of the truncated cone 931 , the sizes of the protrusions are inconsistent, and the protrusions are irregularly distributed.

[0046] By setting the stirring blade of the stirring paddle 93 as a truncated cone 931, the small bottom surface of the truncated cone 931 is closer to the transmission shaft 92 than the large bottom surface, so that when the stirring paddle 93 rotates at a high speed, the medium in the test chamber 421 can be more evenly distributed, and when the stirring paddle 93 rotates at a low speed, the medium in the test chamber 421 will generate turbulence. A plurality of protrusions are provided on the side of the truncated cone 931, and the sizes of the protrusions are inconsistent, and the protrusions are irregularly 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 the rotation process, avoiding the problem of poor local medium flow or uneven mixing, ensuring that the medium in the chamber can achieve a more even distribution in the turbulent state, thereby more accurately simulating the complex flow characteristics of the medium under actual working conditions.

[0047] Working principle: the tested sealing device 3 is installed on the shaft sleeve 2, and the flange 41 and the sleeve 42 are fixedly connected by bolts to form a sealed test chamber 421 between the flange 41 and the sleeve 42, and the end cover 43 and the flange 41 are fixedly connected by bolts to form a sealed leakage chamber 431 between the end cover 43 and the flange 41 to collect the medium in the test chamber 421 leaked from the tested sealing device 3 during the test process, and the medium is input into the test chamber 421 through the circulation mechanism 8, and the test of different speeds is carried out through the speed adjustment mechanism 6, and the radial pressure is applied to the tested sealing device 3 through the loading mechanism 5 to simulate the radial force borne by the tested sealing device 3 in actual operation, and the sleeve 42 is provided with a mounting groove 422 for installing the heating tube 44 so that the heating tube 44 is applied to the test The medium in the test chamber 421 is heated, and the output end of the second motor 91 is connected to the transmission shaft 92 to drive the transmission shaft 92 to rotate. The stirring paddle 93 is connected to the transmission shaft 92 to rotate the stirring paddle 93. The stirring blade of the stirring paddle 93 is set as a truncated cone 931, and the bottom surface of the truncated cone 931 is close to the transmission shaft 92. When the stirring paddle 93 rotates at a high speed, the medium in the test chamber 421 can be more evenly distributed. When the stirring paddle 93 rotates at a low speed, turbulence is generated in the medium in the test chamber 421. A plurality of protrusions are provided on the side of the truncated cone 931, and the sizes of the protrusions are inconsistent. The plurality of protrusions are irregularly distributed. Due to the irregular distribution and size differences of the protrusions, it is ensured that the medium in the chamber can be more evenly distributed in a turbulent state, thereby more accurately simulating the complex flow characteristics of the medium under actual working conditions.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sealing device testing device with multi-stage testing function, characterized in that: The testing device comprises a main shaft (1), a sleeve (2), a sealing device to be tested (3), a testing chamber (4), a loading mechanism (5), a speed regulating mechanism (6), a bracket (7), a circulation mechanism (8) and a stirring mechanism (9); the inner ring of the sleeve (2) is sleeved on the main shaft (1); the sealing device to be tested (3) and the sleeve (2) are tightly connected; the sealing device to be tested (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 to be tested (3) are fixedly connected; the testing chamber (4) and the bracket (7) are fixedly connected; the speed regulating mechanism (6) and the main shaft (1) are fixedly connected; the speed regulating mechanism (6) and the bracket (7) are fixedly connected; the circulation mechanism (8) and the testing chamber (4) are communicated; the stirring mechanism (9) and the bracket (7) are fixedly connected; and the stirring mechanism (9) and the testing chamber (4) are rotatably connected.

2. The sealing device testing device with multi-stage testing function according to claim 1, characterized in that: The test chamber (4) comprises a flange (41), a sleeve (42), an end cover (43), a heating tube (44), a pressure sensor (45) and a temperature sensor (46); the flange (41) is fixedly connected to the tested sealing device (3); the sleeve (42) is provided with a test cavity (421); the flange (41) and the sleeve (42) are fixedly connected; the end cover (43) is provided with a leakage connection cavity (431); the end cover (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; and the temperature sensor (46) and the sleeve (42) are fixedly connected.

3. The sealing device testing device with multi-stage testing function according to claim 2, characterized in that: The loading mechanism (5) comprises 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); and the pressure plate (52) is in abutment with the tested sealing device (3).

4. The sealing device testing device with multi-stage testing function according to claim 3, characterized in that: The speed regulating mechanism (6) comprises a No. 1 motor (61) and a transmission (62); the No. 1 motor (61) and a bracket (7) are fixedly connected; the output end of the No. 1 motor (61) and the input end of the transmission (62) are fixedly connected; and the output end of the transmission (62) and the main shaft (1) are fixedly connected.

5. The sealing device testing device with multi-stage testing function according to claim 4, characterized in that: The circulation mechanism (8) comprises a filter (81), a multi-tube joint (82), a solenoid valve (83), a liquid storage tank (84) and an electric pump (85); the sleeve (42) is provided with an input port (423); the electric pump (85) and the input port (423) are connected by a pipeline; the sleeve (42) is provided with an output port (424); the filter (81) and the output port (424) are connected by a pipeline; three liquid storage tanks (84) are provided; the three liquid storage tanks (84) and the solenoid valve (83) are connected by pipeline; the multi-tube joint (82) and the solenoid valve (83) are fixedly connected; the multi-tube joint (82) and the filter (81) are connected by pipeline; and the electric pump (85) and the multi-tube joint (82) are connected by pipeline.

6. The sealing device testing device with multi-stage testing function according to claim 5, characterized in that: The stirring mechanism (9) comprises a No. 2 motor (91), a transmission shaft (92) and a stirring paddle (93); the No. 2 motor (91) is fixedly connected to the bracket (7); the output end of the No. 2 motor (91) is fixedly connected to the transmission shaft (92); the transmission shaft (92) is rotatably connected to the sleeve (42); and the stirring paddle (93) is fixedly connected to the transmission shaft (92).

7. The sealing device testing device with multi-stage testing function according to claim 6, characterized in that: The stirring blade of the stirring paddle (93) is a truncated cone (931), the small bottom surface of the truncated cone (931) is closer to the transmission shaft (92) than the large bottom surface, and a plurality of protrusions are provided on the side surface of the truncated cone (931), the sizes of the plurality of protrusions are inconsistent, and the plurality of protrusions are irregularly distributed.

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