A magnetic fluid sealing performance testing device

Abstract

The present application relates to the technical field of magnetic fluid seal, more particularly to a kind of magnetic fluid seal performance testing device.A kind of magnetic fluid seal performance testing device, including test main body, plug installed in test main body, test motor is installed in test main body and is electrically connected with plug, motor shaft sleeve can be detachably connected to test motor output shaft, annular sealing device that outer ring can be detachably assembled in test main body and inner ring can be detachably assembled in motor shaft sleeve, the closed air chamber is equipped in the test main body and the closed air chamber is communicated with the sealing device, and the closed air chamber is communicated with pressure test module;The present application can test the sealing performance of different magnetic fluids or different sealing devices under the conditions of different torque, different pressure and different temperature.

Description

Technical Field

[0001] This invention relates to the technical field of magnetic fluid sealing, and more specifically, to a magnetic fluid sealing performance testing device. Background Technology

[0002] In the past, conventional magnetohydrodynamic seals were usually treated as an integral component without dedicated testing equipment for performance testing. Instead, they were directly installed on the application product for testing, resulting in poor interchangeability.

[0003] Existing technology discloses a vacuum dynamic sealing test system, including: a test chamber, a variable frequency motor, a transmission device, and a temperature controller; by changing the magnetic fluid in the magnetic fluid sealing device, the sealing performance of different magnetic fluids in water environments, oil environments, and even more severe environments can be tested; at the same time, it can simulate various different working conditions to test the sealing performance under different conditions. The test results are accurate.

[0004] The aforementioned prior art tests the sealing performance of different magnetic fluids within the same sealing device by replacing the magnetic fluid. The test object is limited to the magnetic fluid, and there is a technical problem that it is not possible to test the sealing performance of different magnetic fluids in different magnetic fluid sealing devices by replacing the magnetic fluid sealing device. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art, which cannot test the sealing performance of different magnetic fluids in different magnetic fluid sealing devices by replacing the magnetic fluid sealing device, and to provide a magnetic fluid sealing performance testing device.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A magnetohydrodynamic sealing performance testing device is provided, comprising a test body, a plug installed in the test body, a test motor installed in the test body and electrically connected to the plug, a motor bushing detachably connected to the output shaft of the test motor, and an annular sealing device with an outer ring detachably assembled in the test body and an inner ring detachably assembled in the motor bushing. The test body has a sealed air chamber that is connected to the sealing device, and the sealed air chamber is connected to a pressure testing module.

[0008] This invention discloses a magnetohydrodynamic (MHD) sealing performance testing device. A plug can connect to a power source to provide power to a test motor. The test motor is detachably connected to the inner ring of the sealing device via a motor bushing, providing torque to the sealing device. The test motor can also transmit torque data via the plug. A pressure testing module can change the air pressure within the sealed chamber. The sealing device can store different magnetohydrodynamic fluids. The outer ring of the annular sealing device is detachably connected to the test body, and the inner ring is detachably connected to the motor bushing. The motor bushing is detachably connected to the output shaft of the test motor, facilitating the adaptation to annular MHD sealing devices with different inner ring sizes by changing the size of the motor bushing. The detachable connection of the inner and outer rings of the sealing device allows for performance testing of various annular MHD sealing devices. This achieves the effect of testing the sealing performance of different magnetohydrodynamic fluids or different annular MHD sealing devices under different torque and pressure conditions, solving the technical problem in the prior art that the sealing performance of different magnetohydrodynamic fluids in different MHD sealing devices cannot be tested by changing the MHD sealing device itself.

[0009] Furthermore, it also includes a test base plate detachably connected to the bottom of the test body and a first sealing ring disposed between the test body and the test base plate. Because the test motor needs to be fixed, a detachably connected test base plate is added to the bottom of the test body to ensure airtightness within the sealed chamber, and a first sealing ring is disposed between the test base plate and the test body to enhance airtightness.

[0010] Furthermore, the pressure testing module includes an air pipe connector connected to the sealed air chamber and a pressure gauge connected to the air pipe connector for measuring pressure. The air pipe connector is connected to an air source. The air pipe connector connected to the air source is used to change the pressure difference in the sealed air chamber, thereby changing the air pressure value of the environment in which the magnetic fluid is located. The pressure gauge connected to the air pipe connector facilitates technicians to read the real-time pressure value in the sealed air chamber and makes it easy to record.

[0011] Furthermore, the sealing device includes a magnetic ring detachably mounted to the motor shaft sleeve, a permanent magnet detachably mounted to the test body and disposed on the outer ring of the magnetic ring, and upper and lower pole shoes respectively disposed on the upper and lower sides of the permanent magnet. A cavity is formed between the permanent magnet, the upper and lower pole shoes, and the magnetic ring, and the magnetofluid is stored in the cavity. The magnetic ring is usually made of soft magnetic material, used to absorb the magnetism of the permanent magnet and transfer the magnetism to the upper and lower pole shoes. The permanent magnet is used to maintain its own magnetism and transfer the magnetism to the upper and lower pole shoes and the magnetic ring. The upper and lower pole shoes are used to position the permanent magnet and improve the distribution of the magnetic field around the permanent magnet. Under the attraction of the magnetic lines of force in the cavity, the magnetofluid will adhere to the magnetic ring and the permanent magnet to form a colloid similar to an O-ring, achieving a sealing effect. The magnetic ring detachably connected to the motor shaft sleeve, the permanent magnet detachably connected to the test body, and the upper and lower pole shoes not only realize the detachability of the magnetofluid sealing device, but also facilitate the replacement of the magnetofluid within the sealing device, achieving the effect of testing different experimental objects.

[0012] Furthermore, it also includes a sealing baffle that can be detachably installed on the test body and positioned above the upper pole shoe. The inner wall of the test body has a lower boss for supporting the lower pole shoe, and the sealing baffle has an upper boss for abutting against the upper pole shoe. The lower boss provides support for the lower pole shoe. To further secure the sealing device, the upper boss of the added sealing baffle restricts the axial movement of the upper pole shoe, preventing damage to the stability of the magnetic field and thus avoiding magnetofluid leakage that could affect the sealing performance test.

[0013] Furthermore, a second sealing ring is provided between the lower boss and the lower pole shoe. The second sealing ring can ensure the airtightness of the contact surface between the lower pole shoe and the lower boss, and prevent air from entering between the lower pole shoe and the lower boss through the outer wall of the pole shoe, thus affecting the airtightness of the sealed air chamber.

[0014] Furthermore, it also includes a splash guard that is detachably mounted on the sealing baffle and positioned above the sealing device. When the pressure inside the sealed chamber reaches the withstand limit of the magnetic fluid, the colloid formed by the magnetic fluid, similar to an O-ring, reaches its sealing limit, and the magnetic fluid will rupture. To facilitate observation of the rupture location when the magnetic fluid exceeds its pressure withstand limit, a splash guard is installed above the sealing device. When the magnetic fluid ruptures due to exceeding its pressure withstand limit, the splashed magnetic fluid will adhere to the splash guard, making it easy for technicians to observe and record the location.

[0015] Furthermore, the system also includes a heating module for heating the sealing device. The heating module comprises a flexible heating element connected between the test body and the sealing baffle for heating the sealing device, and a thermocouple connected to the sealing baffle and disposed between the flexible heating element and the sealing device. The flexible heating element and the thermocouple are connected to a temperature controller. The installation position of the flexible heating element between the test body and the sealing baffle ensures uniform heating of the sealing device, guaranteeing temperature transfer. The thermocouple, installed between the flexible heating element and the sealing device, monitors the temperature and converts the temperature data into an electrical signal, which is then sent to the temperature controller. The temperature controller ensures a constant temperature of the flexible heating element when it is heated and obtains the frictional temperature rise of the magnetic fluid measured by the thermocouple when it is not heated, thus achieving the effect of testing the magnetic fluid sealing performance at different temperatures.

[0016] Furthermore, the motor bushing includes a first bushing axially connected to the output shaft of the test motor, a second bushing detachably assembled between the first bushing and the inner ring of the magnetic guide ring, and several third sealing rings disposed between the first bushing and the second bushing. A bearing is provided between the outer wall of the first bushing and the inner wall of the test body. By changing the size of the second bushing detachably assembled with the first bushing to adapt to different sizes of annular sealing devices, the bearing can ensure the rotational accuracy of the motor and ensure that the circular runout error meets the clearance requirements between the magnetic guide ring and the permanent magnet; the third sealing rings can effectively seal the installation gap between the first bushing and the second bushing, ensuring that external gas does not enter the internal environment.

[0017] Furthermore, it also includes a quick-release handle detachably mounted on the second bushing. The quick-release handle connects to the second bushing for manual rotation of the first and second bushings. During the filling of the magnetic fluid, slow manual rotation causes rotation between the magnetic guide ring connected to the second bushing and the permanent magnet, facilitating rapid molding of the magnetic fluid. Moreover, because the magnetic field strength at the gap between the magnetic guide ring and the permanent magnet is very high, it is difficult to disassemble the second bushing from the first bushing. Therefore, the quick-release handle improves the disassembly efficiency of the testing device and offers the advantages of labor-saving convenience.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The magnetic fluid sealing performance testing device of the present invention can not only test the sealing performance of different magnetic fluids, but also perform performance tests on magnetic fluid sealing devices with various annular designs. It achieves the effect of testing the sealing performance of different magnetic fluids or different sealing devices under different torque, pressure and temperature conditions, and solves the technical problem in the prior art that the sealing performance of different magnetic fluids in different magnetic fluid sealing devices cannot be tested by replacing the magnetic fluid sealing device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a magnetohydrodynamic sealing performance testing device.

[0021] Figure 2 An exploded view of a magnetohydrodynamic sealing performance testing device;

[0022] Figure 3 A cross-sectional view of a magnetohydrodynamic sealing performance testing device;

[0023] Figure 4 This is a schematic diagram of the test motor;

[0024] Figure 5 for Figure 3 A magnified view of part A in the image;

[0025] Figure 6 A schematic diagram of the sealing device.

[0026] In the attached diagram: 100, Test body; 101, Lower boss; 110, Plug; 120, Sealed air chamber; 130, Test base plate; 140, First sealing ring; 150, Mounting hole; 160, Sealing baffle; 161, Upper boss; 170, Second sealing ring; 180, Splash shield; 200, Test motor; 300, Motor bushing; 310, First bushing; 320, Second bushing; 321, Quick release handle; 330, Third sealing ring; 340, Bearing; 400, Sealing device; 410, Magnetic ring; 420, Permanent magnet; 430, Upper pole shoe; 440, Lower pole shoe; 450, Cavity; 500, Pressure test module; 510, Air pipe connector; 520, Pressure gauge; 600, Heating module; 610, Flexible heating element; 620, Thermocouple. Detailed Implementation

[0027] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0028] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0029] Example 1

[0030] like Figures 1 to 4 The image shows a first embodiment of a magnetohydrodynamic sealing performance testing device of the present invention.

[0031] A magnetohydrodynamic sealing performance testing device includes a test body 100, a plug 110 installed in the test body 100, a test motor 200 installed inside the test body 100 and electrically connected to the plug 110, a motor bushing 300 detachably connected to the output shaft of the test motor 200, and an annular sealing device 400 with an outer ring detachably assembled inside the test body 100 and an inner ring detachably assembled to the motor bushing 300. The test body 100 has a sealed air chamber 120 connected to the sealing device 400, and the sealed air chamber 120 is connected to a pressure testing module 500. The plug 110 can connect to a power source to provide power to the test motor 200. The test motor 200 is detachably connected to the inner ring of the sealing device 400 via the motor bushing 300, providing torque to the sealing device 400. The test motor 200 can also transmit torque data via the plug 110. The pressure test module 500 can change the air pressure inside the sealed chamber 120. The sealing device 400 can be used to store different magnetic fluids. The outer ring of the annular sealing device 400 is detachably connected to the test body 100, and the inner ring is detachably connected to the motor bushing 300. The motor bushing 300 is also detachably connected to the test... The output shaft of the test motor 200 is designed to accommodate magnetofluidic seal devices 400 with different inner ring sizes by changing the size of the motor bushing 300. The detachable connection between the inner and outer rings of the seal device 400 allows for performance testing of magnetofluidic seal devices 400 with various ring designs. This achieves the effect of testing the sealing performance of magnetofluidic seal devices 400 with different magnetic fluids or different ring designs under different torque and pressure conditions, solving the technical problem in the prior art that the sealing performance of different magnetic fluids in different magnetofluidic seal devices 400 cannot be tested by replacing the magnetofluidic seal device 400.

[0032] This includes a test base plate 130 detachably connected to the bottom of the test body 100 and a first sealing ring 140 disposed between the test body 100 and the test base plate 130. Because the test motor 200 needs to be fixed, a detachably connected test base plate 130 is added to the bottom of the test body 100 to ensure airtightness within the sealed air chamber 120, and a first sealing ring 140 is provided between the test base plate 130 and the test body 100 to enhance airtightness.

[0033] In addition, the bottom of the test body 100 is provided with a mounting hole 150 for fixing the test motor 200 and communicating with the test body 100, and a first sealing ring 140 is provided around the mounting hole 150. The motor needs to be fixed by bolts through the mounting hole 150. In order to ensure the airtightness inside the test body 100, the first sealing ring 140 is provided between the test base plate 130 and the test body 100, and around the mounting hole 150 to enhance the airtightness.

[0034] In addition, such as Figure 4 As shown, the test motor 200 is a disc-type shaftless servo motor. Its characteristic is that the output end requires an external bushing. The bushing is inserted into the output end of the disc-type shaftless motor and is driven to rotate by torque. It is suitable for the application scenarios of this invention where the motor bushing 300 needs to be replaced to adapt to the annular sealing device 400 of different sizes. In addition, the disc-type shaftless servo motor has high control precision. It only runs when a control command is given and stops when no command is given. It will not continue to rotate due to inertia even when the power is cut off, thus providing accurate torque output for testing magnetofluids.

[0035] The pressure testing module 500 includes an air pipe connector 510 connected to the sealed air chamber 120 and a pressure gauge 520 connected to the air pipe connector 510 for measuring pressure. The air pipe connector 510 is connected to an air source. The air pipe connector 510 connected to the air source is used to change the pressure difference within the sealed air chamber 120, thereby changing the air pressure value of the environment in which the magnetofluid is located. The pressure gauge 520 is connected to the air pipe connector 510 to facilitate technicians in reading and recording the real-time pressure value within the sealed air chamber 120.

[0036] Example 2

[0037] like Figures 1 to 6 The following is a second embodiment of a magnetohydrodynamic sealing performance testing device of the present invention.

[0038] This embodiment is similar to Embodiment 1, except that: the sealing device 400 includes a magnetic ring 410 whose inner ring is detachably mounted on the motor bushing 300, a permanent magnet 420 which is detachably mounted on the test body 100 and disposed on the outer ring of the magnetic ring 410, and an upper pole shoe 430 and a lower pole shoe 440 respectively disposed on the upper and lower sides of the permanent magnet 420. A cavity 450 is provided between the permanent magnet 420, the upper pole shoe 430 and the lower pole shoe 440 and the magnetic ring 410, and the magnetic fluid is stored in the cavity 450. The magnetic ring 410 is typically made of soft magnetic material and is used to absorb the magnetism of the permanent magnet 420 and transfer the magnetism to the upper and lower pole shoes 440. The permanent magnet 420 is used to maintain its own magnetism and transfer the magnetism to the upper and lower pole shoes 440 and the magnetic ring 410. The upper and lower pole shoes 440 are used to position the permanent magnet 420 and improve the distribution of the magnetic field around the permanent magnet 420. Under the attraction of the magnetic lines of force within the cavity 450, the magnetic fluid adheres to the magnetic ring 410 and the permanent magnet 420 to form a colloid similar to an O-ring, achieving a sealing effect. The magnetic ring 410, which is detachably connected to the motor bushing 300, and the permanent magnet 420, which is detachably connected to the test body 100, as well as the upper and lower pole shoes 440, not only realize the detachability of the magnetic fluid sealing device 400, but also facilitate the replacement of the magnetic fluid within the sealing device 400, achieving the effect of testing different experimental objects.

[0039] The system also includes a sealing baffle 160 that is detachably installed on the test body 100 and positioned above the upper pole shoe 430. The inner wall of the test body 100 has a lower boss 101 for supporting the lower pole shoe 440, and the sealing baffle 160 has an upper boss 161 for abutting against the upper pole shoe 430. The lower boss 101 provides support for the lower pole shoe 440. To further secure the sealing device 400, the upper boss 161 of the added sealing baffle 160 restricts the axial movement of the upper pole shoe 430, preventing damage to the stability of the magnetic field and thus avoiding magnetofluid leakage that could affect the sealing performance of the test.

[0040] A second sealing ring 170 is provided between the lower boss 101 and the lower pole shoe 440. The second sealing ring 170 can ensure the airtightness of the contact surface between the lower pole shoe 440 and the lower boss 101, and prevent air from entering between the lower pole shoe 440 and the lower boss 101 through the outer wall of the pole shoe, thus affecting the airtightness of the sealed air chamber 120.

[0041] This also includes a splash guard 180 that is detachably mounted on the sealing baffle 160 and positioned above the sealing device 400. When the pressure inside the sealed air chamber 120 reaches the withstand limit of the magnetic fluid, the colloid formed by the magnetic fluid, similar to an O-ring, reaches its sealing limit, and the magnetic fluid will rupture. To facilitate observation of the rupture location when the magnetic fluid exceeds its pressure withstand limit, the splash guard 180 is provided above the sealing device 400. When the magnetic fluid ruptures due to exceeding its pressure withstand limit, the splashed magnetic fluid will adhere to the splash guard 180, making it easy for technicians to observe and record the location.

[0042] The system also includes a heating module 600 for heating the sealing device 400. The heating module 600 includes a flexible heating element 610 connected between the test body 100 and the sealing baffle 160 for heating the sealing device 400, and a thermocouple 620 connected to the sealing baffle 160 and disposed between the flexible heating element 610 and the sealing device 400. A temperature controller is connected to the flexible heating element 610 and the thermocouple 620. The flexible heating element 610, installed at the connection point between the test body 100 and the sealing baffle 160, can uniformly heat the sealing device 400, ensuring temperature transfer. The thermocouple 620, installed between the flexible heating element 610 and the sealing device 400, can monitor the temperature and convert the temperature data into an electrical signal, which is then sent to the temperature controller. The temperature controller can ensure that the temperature of the flexible heating element 610 remains constant when heated, and obtain the frictional temperature rise of the magnetic fluid measured by the thermocouple 620 when not heated, thus achieving the effect of testing the sealing performance of the magnetic fluid at different temperatures.

[0043] Example 3

[0044] like Figure 3 and Figure 5 The following is a third embodiment of a magnetohydrodynamic sealing performance testing device of the present invention.

[0045] This embodiment is similar to Embodiment 1 or Embodiment 2, except that: the motor bushing 300 includes a first bushing 310 axially connected to the output shaft of the test motor 200, a second bushing 320 detachably assembled between the first bushing 310 and the inner ring of the magnetic ring 410, and several third sealing rings 330 disposed between the first bushing 310 and the second bushing 320. A bearing 340 is provided between the outer wall of the first bushing 310 and the inner wall of the test body 100. By changing the size of the second bushing 320 detachably assembled to the first bushing 310 to accommodate different sizes of annular sealing devices 400, the bearing 340 can ensure the rotational accuracy of the motor and ensure that the circular runout error meets the gap requirements between the magnetic ring 410 and the permanent magnet 420. The third sealing rings 330 can effectively seal the installation gap between the first bushing 310 and the second bushing 320, ensuring that external gas does not enter the internal environment.

[0046] This also includes a quick-release handle 321 detachably mounted on the second bushing 320. The quick-release handle 321 connects to the second bushing 320 for manually rotating the first bushing 310 and the second bushing 320. During the filling of the magnetic fluid, slow manual rotation causes rotation between the magnetic ring 410 connected to the second bushing 320 and the permanent magnet 420, which facilitates the rapid molding of the magnetic fluid. Furthermore, because the magnetic field strength at the gap between the magnetic ring 410 and the permanent magnet 420 is very high, it is difficult to disassemble the second bushing 320 from the first bushing 310. Therefore, the quick-release handle 321 can improve the disassembly efficiency of the testing device and has the advantages of saving effort and convenience.

[0047] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0048] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A magnetic fluid seal performance testing device, characterized by: The utility model provides a pressure test device, including test body (100), install the plug (110) of test body (100), install the test motor (200) of test body (100) and with the electric motor shaft sleeve (300) of plug (110) electric connection, the annular sealing device (400) of outer ring detachable assembly in test body (100) and inner ring detachable assembly in electric motor shaft sleeve (300), the closed air chamber (120) is equipped with in test body (100) and the closed air chamber (120) is communicated with sealing device (400), the closed air chamber (120) is communicated with pressure test module (500), The sealing device (400) includes the magnetic conducting ring (410) of inner ring detachable assembly in electric motor shaft sleeve (300), the permanent magnet (420) of detachable assembly in test body (100) and setting in the outer ring of magnetic conducting ring (410), and the upper pole shoe (430) and lower pole shoe (440) are arranged respectively on the upper and lower sides of permanent magnet (420), the cavity (450) is surrounded between permanent magnet (420), upper pole shoe (430) and lower pole shoe (440) and magnetic conducting ring (410), and the magnetic fluid is stored in the cavity (450), The electric motor shaft sleeve (300) includes the first shaft sleeve (310) of detachable connection in test motor (200) output shaft, the second shaft sleeve (320) of detachable assembly between first shaft sleeve (310) and the inner ring of magnetic conducting ring (410) and a plurality of third sealing rings (330) are arranged between first shaft sleeve (310) and second shaft sleeve (320), bearing (340) is equipped between the outer wall of first shaft sleeve (310) and the inner wall of test body (100), Still include detachable installation in second shaft sleeve (320) quick release handle (321).

2. The magnetic fluid seal performance testing device of claim 1, wherein: Still include test base plate (130) of detachable connection in the bottom of test body (100) and first sealing ring (140) are arranged between test body (100) and test base plate (130).

3. The magnetic fluid seal performance testing device of claim 1, wherein: The pressure test module (500) includes the gas pipe joint (510) of communication in closed air chamber (120) and the pressure gauge (520) of communication in gas pipe joint (510) for pressure measurement, the gas pipe joint (510) is communicated with gas source.

4. The magnetic fluid seal performance testing device of claim 1, wherein: Still include detachable installation in test body (100) and set above upper pole shoe (430) sealing baffle (160), the inner wall of test body (100) is equipped with lower boss (101) for supporting lower pole shoe (440), and the upper boss (161) for abutting upper pole shoe (430) is equipped in sealing baffle (160).

5. The magnetic fluid seal performance testing device of claim 4, wherein: Second sealing ring (170) is equipped between lower boss (101) and lower pole shoe (440).

6. The magnetic fluid seal performance testing device of claim 4, wherein: Still include detachable assembly in sealing baffle (160) and set above sealing device (400) splash-proof board (180).

7. The magnetic fluid seal performance testing device of claim 4, wherein: The heating module (600) for heating the sealing device (400) comprises a flexible heating sheet (610) connected between the test main body (100) and the sealing baffle (160) and used for heating the sealing device (400), and a thermocouple (620) connected to the sealing baffle (160) and arranged between the flexible heating sheet (610) and the sealing device (400), wherein the flexible heating sheet (610) and the thermocouple (620) are connected with a temperature controller.

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