Multifunctional precision experimental device for air foil thrust bearing

Abstract

The application discloses a multifunctional precision experimental device for air foil thrust bearing, and relates to the field of detection equipment.The technical scheme of the application is as follows:the base is provided with the following modules: a support module for supporting a rotor; a driving module for being connected with the air foil thrust bearing and providing rotating power; a static loading module for driving the support module and the rotor to axially approach or move away from the driving module and providing a static loading force; a dynamic loading module for being detachably connected with the second end of the rotor and providing a dynamic loading force; and a measuring module for measuring the axial displacement, axial stress, friction torque and wear condition of the air foil thrust bearing.The scheme can precisely and comprehensively detect the performance of the air foil thrust bearing, including the displacement under the static and dynamic axial loading, the static and dynamic loading axial pressure and the friction torque.

Description

Technical Field

[0001] This invention relates to the field of testing equipment, and in particular to a multifunctional precision experimental device for air foil thrust bearings. Background Technology

[0002] With the rapid development of industries such as aerospace, cryogenic refrigeration, petrochemicals, and large shipbuilding, rotating machinery not only needs to meet the requirements of high speed and high precision, but also needs to have excellent stability. As an important supporting component of the rotor in rotating machinery, the performance of bearings directly affects the working quality of the rotating machinery.

[0003] Air foil thrust bearings mainly consist of a top foil and a corrugated foil. The top foil and rotor form a dynamic pressure air film under the wedge effect. The corrugated foil provides elastic support and can adjust its deformation distribution and magnitude according to the working conditions, reducing fluctuations in air film thickness and pressure, and improving the bearing's self-adaptability. Air foil thrust bearings utilize gas (mostly air) as the lubricating medium and are characterized by being environmentally friendly and pollution-free, having high speed, heat resistance, cold resistance, low friction, and high precision. They have broad application prospects in fields such as electronics, machinery, aerospace, and precision machine tools.

[0004] Because air foil thrust bearings operate at extremely high speeds, static and dynamic performance evaluations are crucial. Failure can not only damage the mechanical system but also endanger the safety of personnel. Furthermore, the number of start-stop cycles of the air foil directly affects the bearing's reliability and lifespan. Therefore, performance simulation experiments of air foil thrust bearings are essential for their successful application. Since the bearing clearance of air foil thrust bearings is on the micrometer scale during operation, monitoring of high-speed rotation and operational status is extremely demanding.

[0005] In summary, current experimental devices for testing the performance of air foil thrust bearings suffer from several drawbacks: they cannot accurately simulate the actual operating conditions of the bearings, have low experimental speeds, and use only one type of loading method. Furthermore, they can only test a specific performance characteristic and cannot comprehensively assess the bearing's overall performance. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a multifunctional precision experimental device for air foil thrust bearings. This device enables static stiffness tests, static loading / unloading tests, dynamic loading / unloading tests, and start-stop tests on air foil thrust bearings, measuring displacement, static and dynamic axial pressure, and frictional torque under static and dynamic axial loading. Furthermore, the static loading module serves two purposes: firstly, it moves the support module and rotor axially away from or towards the drive module, facilitating the installation and disassembly of the air foil thrust bearing; secondly, it provides axial static loading force to the air foil thrust bearing.

[0007] The technical solution adopted by this invention to solve its technical problem is: a multifunctional precision experimental device for air foil thrust bearings, comprising a base, wherein the base includes the following modules:

[0008] Support module: Used to support the rotor, with an air foil thrust bearing installed at the first end of the rotor;

[0009] Drive module: Located at the first end of the rotor, it connects with the air foil thrust bearing and provides rotational power;

[0010] Static loading module: used to drive the support module and rotor axially closer to or further away from the drive module and provide static loading force;

[0011] Dynamic loading module: used for detachable docking with the second end of the rotor and providing dynamic loading force;

[0012] Measurement module: Set for air foil thrust bearing, used to measure the axial displacement, axial force, friction torque and wear of air foil thrust bearing.

[0013] The static loading module in this solution is used to drive the support module and rotor axially, either moving them away from or towards the drive module. When moving them away from the drive module, the air foil thrust bearing can be installed and replaced. After installation, moving the support module and rotor closer to the drive module provides axial static loading force to the air foil thrust bearing. The dynamic loading module is detachably connected to the second end of the rotor. While the support module and rotor move, the dynamic loading module maintains relative motion with the rotor. After the positions of the support module and rotor are determined, the relative position of the rotor and the dynamic loading module is locked, at which point dynamic loading force can be applied. During the application of axial static or dynamic loading force, the measurement module measures various states of the air foil thrust bearing.

[0014] Preferably, the support module includes a slide table and a linear bearing;

[0015] The slide table is provided with a bearing seat, the bearing seat is provided with the linear bearing, and the rotor passes through the linear bearing;

[0016] A thrust disk is provided at the first end of the rotor, and the air foil thrust bearing is disposed on the disk surface of the thrust disk.

[0017] The thrust plate makes it easier to install air foil bearings and measure their operating status.

[0018] Preferably, the thrust disc is provided with several sets of positioning holes at different distances from the center, and screws for fixing the air foil thrust bearing are fitted into the positioning holes.

[0019] By using positioning holes set at different distances from the center, it is possible to fix air foil thrust bearings of different sizes, thereby improving their adaptability.

[0020] Preferably, the drive module includes a drive motor and a drive disk. The drive motor is mounted on the base, and the drive disk is located at the output end of the drive motor. The drive disk is positioned corresponding to the air foil thrust bearing. Axial loading force is provided through surface contact between the drive disk and the air foil thrust bearing.

[0021] Preferably, the static loading module includes a slide rail, a ball screw, and a nut;

[0022] The slide rail and the ball screw are arranged side by side on the base. The slide table slides relative to the slide rail. The nut is threaded onto the ball screw. The nut is fixed to the slide table by a nut seat. The ball screw is driven by a loading motor.

[0023] The axial sliding of the slide table can be precisely controlled by the combination of ball screw and slide rail, providing static loading for the test.

[0024] Preferably, the dynamic loading module includes a first pressure sensor, an electromagnetic vibrator, and a connecting cylinder. The first pressure sensor is disposed at the second end of the rotor, and both ends of the connecting cylinder are respectively provided with internal threads. The two ends of the connecting cylinder are respectively adapted to the output end of the electromagnetic vibrator and the first pressure sensor through the internal threads. The first pressure sensor can detect the magnitude of the applied force in real time.

[0025] The output end of the electromagnetic vibrator and the first pressure sensor can be connected or disconnected through the connecting cylinder. When disconnected, the support module and rotor can be moved by the static loading module. After the positions of the support module and rotor are determined, if dynamic loading is required, the output end of the electromagnetic vibrator and the first pressure sensor can be connected through the connecting cylinder. The excitation force generated by the electromagnetic vibrator will be transmitted to the rotor through the connecting cylinder.

[0026] Preferably, the connecting cylinder has an external thread, which is adapted to a static-dynamic conversion sleeve. The slide table has a static-dynamic conversion base, which is located on the side closer to the electromagnetic vibrator relative to the static-dynamic conversion sleeve. After rotation, the static-dynamic conversion sleeve abuts against the static-dynamic conversion base. By rotating the static-dynamic conversion sleeve, it can be moved closer to or away from the static-dynamic base. When it is away from the static-dynamic base, the static-dynamic base will not interfere with the static-dynamic conversion sleeve. When it is close to the static-dynamic base, the static-dynamic conversion sleeve abuts against the static-dynamic base, which can prevent the connecting cylinder from sliding towards the electromagnetic vibrator. At this time, the axial loading force provided by the static loading module prevents the rotor from moving in the opposite direction or acting on the electromagnetic vibrator.

[0027] Preferably, the measurement module includes a support and several eddy current sensors. The eddy current sensors are mounted above the slide via the support, and each eddy current sensor is evenly distributed circumferentially on the surface of the thrust disk. By using several axially evenly distributed eddy current sensors, the state parameters of the air foil thrust bearing can be detected more comprehensively.

[0028] Preferably, the measuring module includes a lifting eye bolt, a first tension spring, a second tension spring, and a second force sensor. The lifting eye bolt is fixed to the thrust plate. The inner ends of the first and second tension springs are respectively connected to the lifting eye bolt. The outer end of the first tension spring is connected to the slide. The second tension spring is connected to the slide via the second force sensor. The line containing the second tension spring and the second force sensor is perpendicular to the lifting eye bolt. The first and second springs provide preload for the second force sensor. The second force sensor measures the deflection force generated by the thrust plate when the air foil thrust bearing is working, and then obtains the frictional torque through the lever principle.

[0029] Preferably, the measurement module further includes a pole, a suspension rod, a support rod, and an optical microscope;

[0030] The lower end of the upright is fixed to the slide table on one side of the air foil thrust bearing. The upper part of the upright is hinged to the first end of the suspension rod. The middle part of the upright is hinged to the first end of the support rod. The second end of the support rod is hinged obliquely upward to the suspension rod. The optical microscope is installed at the second end of the suspension rod.

[0031] During the experiment, the second end of the strut was separated from the suspension rod, and the strut and suspension rod swung away from the drive disk. After the static or dynamic loading experiment was completed, the air foil thrust bearing was separated from the drive disk, and the second end of the strut was hinged to the suspension rod. The suspension rod swung between the air foil thrust bearing and the drive disk. An optical microscope was set on the suspension rod, and the wear of the bearing foil was detected by the optical microscope. By rotating the rotor equipped with the bearing, the circumferential wear of the air foil thrust foil could be obtained.

[0032] Advantages of this invention:

[0033] The proposed solution enables static stiffness tests, static loading / unloading tests, dynamic loading / unloading tests, and start-stop tests on air foil thrust bearings. It measures displacement, axial pressure, and frictional torque under static and dynamic axial loading. Furthermore, the static loading module serves two purposes: firstly, it moves the support module and rotor axially away from or towards the drive module, facilitating the installation and removal of the air foil thrust bearing; secondly, it provides axial static loading force to the air foil thrust bearing. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only six of the drawings in this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a right-side perspective view of an embodiment of the present invention;

[0036] Figure 2 This is a left perspective view of an embodiment of the present invention;

[0037] Figure 3 This is a longitudinal cross-sectional view of an embodiment of the present invention;

[0038] Figure 4 This is a cross-sectional view of the right side of the thrust disk in an embodiment of the present invention;

[0039] Figure 5 This is a cross-sectional view of the air foil thrust bearing according to an embodiment of the present invention;

[0040] Figure 6 This is a schematic diagram of the static loading module according to an embodiment of the present invention;

[0041] The components are as follows: 1. Base; 2. Rotor; 3. Slide table; 4. Linear bearing; 5. Bearing housing; 6. Thrust disc; 7. Air foil thrust bearing; 8. Support rod; 9. Drive motor; 10. Drive disc; 11. Slide rail; 12. Ball screw; 13. Nut; 14. Loading motor; 15. First pressure sensor; 16. Electromagnetic vibrator; 17. Connecting cylinder; 18. Static-dynamic conversion sleeve; 19. Static-dynamic conversion base; 20. Bracket; 21. Eddy current sensor; 22. Lifting eye bolt; 23. First tension spring; 24. Second tension spring; 25. Second tension sensor; 26. Upright pole; 27. Suspension rod. Detailed Implementation

[0042] To enhance understanding of the present invention, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. These embodiments are only used to explain the invention and do not limit the scope of protection of the invention.

[0043] Example

[0044] like Figure 1 and Figure 2 As shown, a multifunctional precision experimental device for air foil thrust bearings includes a base 1, on which the following modules are provided.

[0045] Support module: used to support rotor 2, with an air foil thrust bearing 7 installed at the first end of rotor 2.

[0046] Drive module: Located at the first end of rotor 2, it connects with air foil thrust bearing 7 and provides rotational power.

[0047] Static loading module: used to drive the support module and rotor 2 axially closer to or further away from the drive module and provide static loading force.

[0048] Dynamic loading module: used to detachably dock with the second end of rotor 2 and provide dynamic loading force.

[0049] Measurement module: Set for the air foil thrust bearing 7, used to measure the axial displacement, axial force, friction torque and wear of the air foil thrust bearing 7.

[0050] The static loading module in this solution is used to drive the support module and rotor 2 to move axially, either away from or towards the drive module. When moving away from the drive module, the air foil thrust bearing 7 can be installed and replaced. After installation, it moves the support module and rotor 2 closer to the drive module, providing axial static loading force to the air foil thrust bearing 7. The dynamic loading module is detachably connected to the second end of rotor 2. When the support module and rotor 2 move, the dynamic loading module maintains relative movement with rotor 2. After the positions of the support module and rotor 2 are determined, the relative position of rotor 2 and dynamic loading module is locked, at which point dynamic loading force can be provided. During the application of axial static or dynamic loading force, the measuring module measures various states of the air foil thrust bearing 7.

[0051] Combination Figure 3 As shown, the support module includes a slide table 3 and a linear bearing 4;

[0052] The slide table 3 is provided with a bearing seat 5, the bearing seat 5 is provided with the linear bearing 4, and the rotor 2 passes through the linear bearing 4;

[0053] The first end of the rotor 2 is provided with a thrust disk 6, and the air foil thrust bearing 7 is disposed on the disk surface of the thrust disk 6.

[0054] The thrust plate 6 makes it easier to install the air foil bearing and measure its operating status.

[0055] The thrust disk 6 has several sets of positioning holes distributed at different distances from the center, and screws for fixing the air foil thrust bearing 7 are fitted inside the positioning holes.

[0056] By using positioning holes set at different distances from the center, it is possible to fix air foil thrust bearings of different sizes, thereby improving their adaptability.

[0057] The drive module includes a drive motor 9 and a drive disk 10. The drive motor 9 is mounted on the base 1, and the drive disk 10 is located at the output end of the drive motor 9. The drive disk 10 is positioned corresponding to the air foil thrust bearing 7. The drive disk 10 makes surface contact with the air foil thrust bearing 7 to provide axial loading force. The drive motor 9 is equipped with an encoder to monitor its speed and torque signals for start-stop experiments. A cooling system is also included to ensure the motor operates within a safe temperature range.

[0058] gather Figure 6 As shown, the static loading module includes a slide rail 11, a ball screw 12, and a nut 13;

[0059] The slide rail 11 and the ball screw 12 are arranged side by side on the base 1. The slide table 3 is slidably engaged with the slide rail 11. The nut 13 is threaded onto the ball screw 12 and fixed to the slide table 3 via a nut seat. The ball screw 12 is driven by a loading motor 14, which is connected to the ball screw 12 via a coupling. The loading motor 14 has a self-locking function to ensure the fixed position of the slide table 3. In this embodiment, the loading motor 14 is a servo motor. Precise control of the linear displacement of the slide table 3 facilitates adjustment of the initial value of the eddy current sensor 21, improving the accuracy of displacement measurement.

[0060] The ball screw 12 and the slide rail 11 work together to precisely control the axial sliding of the slide table 3, providing static loading for the test.

[0061] The dynamic loading module includes a first pressure sensor 15, an electromagnetic vibrator 16, and a connecting cylinder 17. The first pressure sensor 15 is disposed at the second end of the rotor 2. Both ends of the connecting cylinder 17 are respectively provided with internal threads, and both ends of the connecting cylinder 17 are respectively adapted to the output end of the electromagnetic vibrator 16 and the first pressure sensor 15 through the internal threads. The first pressure sensor 15 can detect the magnitude of the applied force in real time.

[0062] The output end of the electromagnetic vibrator 16 and the first pressure sensor 15 can be connected or disconnected through the connecting cylinder 17. When disconnected, the support module and rotor 2 can be moved by the static loading module. After the positions of the support module and rotor 2 are determined, if dynamic loading is required, the output end of the electromagnetic vibrator 16 and the first pressure sensor 15 are connected through the connecting cylinder 17. The excitation force generated by the electromagnetic vibrator 16 will be transmitted to the rotor 2 through the connecting cylinder 17.

[0063] The connecting cylinder 17 has an external thread, which is adapted to a static-dynamic conversion sleeve 18. The slide 3 has a static-dynamic conversion base 19, which is located near the electromagnetic vibrator 16 relative to the static-dynamic conversion sleeve 18. After rotating, the static-dynamic conversion sleeve 18 abuts against the static-dynamic conversion base 19. By rotating the static-dynamic conversion sleeve 18, it can be moved closer to or away from the static-dynamic base. When it is away from the static-dynamic base, the static-dynamic base will not interfere with the static-dynamic conversion sleeve 18. When it is close to the static-dynamic base, the static-dynamic conversion sleeve 18 abuts against the static-dynamic base, which can prevent the connecting cylinder 17 from sliding towards the electromagnetic vibrator 16. At this time, the axial loading force provided by the static loading module prevents the rotor 2 from moving in the opposite direction or acting on the electromagnetic vibrator 16.

[0064] The measurement module includes a bracket 20 and several eddy current sensors 21. The eddy current sensors 21 are mounted above the slide table 3 via the bracket 20, and are evenly distributed circumferentially on the surface of the thrust disk 6. The evenly distributed eddy current sensors 21 allow for more comprehensive detection of the state parameters of the air foil thrust bearing 7. To avoid the influence of thrust disk unevenness, the displacement is the average value measured by three evenly distributed eddy current sensors 21, which are three sensors with an included angle of 120 degrees. The detection of the thrust disk 6 by the eddy current sensors 21 indirectly provides the axial displacement of the air foil thrust bearing 7.

[0065] Combination Figure 4 As shown, the measurement module includes a lifting eye bolt 22, a first tension spring 23, a second tension spring 24, and a second force sensor 25. The lifting eye bolt 22 is fixed to the thrust plate 6. The inner ends of the first tension spring 23 and the second tension spring 24 are respectively connected to the lifting eye bolt 22. The outer end of the first tension spring 23 is connected to the slide 3. The second tension spring 24 is connected to the slide 3 through the second force sensor 25. The line containing the second tension spring 24 and the second force sensor 25 is perpendicular to the lifting eye bolt 22. The springs provide preload to the second force sensor 25. The second force sensor 25 can measure the deflection force generated by the thrust plate 6 when the air foil thrust bearing 7 is working, and then obtain the frictional torque through the lever principle. The first and second springs can provide preload to the second force sensor 25, improving the accuracy of the frictional torque measurement.

[0066] Combination Figure 5 As shown, the measurement module also includes a vertical rod 26, a suspension rod 27, a support rod 8, and an optical microscope;

[0067] The lower end of the upright rod 26 is fixed to the slide table 3 on one side of the air foil thrust bearing 7. The upper part of the upright rod 26 is hinged to the first end of the suspension rod 27. A rotating shaft is fixed to the first end of the suspension rod 27, and the rotating shaft is rotatably engaged with the upper end of the upright rod 26. The rotating shaft is equipped with a rotation knob. The middle part of the upright rod 26 is hinged to the first end of the support rod 8. The second end of the support rod 8 is obliquely hinged to the suspension rod 27. The optical microscope is mounted on the second end of the suspension rod 27.

[0068] During the experiment, the second end of the strut 8 is separated from the suspension rod 27. The strut 8 and suspension rod 27 swing away from the drive disk 10. After the static or dynamic loading experiment is completed, the air foil thrust bearing 7 is separated from the drive disk 10. The second end of the strut 8 is hinged to the suspension rod 27, with the suspension rod 27 swinging between the air foil thrust bearing 7 and the drive disk 10. An optical microscope is set on the suspension rod 27 to inspect the wear of the bearing foil. By rotating the rotor equipped with the bearing, the circumferential wear of the air foil thrust foil can be obtained. At the same time, it is determined whether the bearing needs to be replaced or the coating refilled to avoid damage to the bearing due to excessive wear.

[0069] Advantages of this invention:

[0070] The proposed solution enables static stiffness tests, static loading / unloading tests, dynamic loading / unloading tests, and start-stop tests on the air foil thrust bearing 7. It measures displacement, axial pressure, and frictional torque under static and dynamic axial loading. Furthermore, the static loading module serves two purposes: firstly, it moves the support module and rotor 2 axially away from or towards the drive module to provide driving force, facilitating the installation and disassembly of the air foil thrust bearing 7; secondly, it provides axial static loading force to the air foil thrust bearing 7.

[0071] The system can obtain axial load, axial displacement, frictional torque, and rotational speed signals during the experimental bearing's operation, thereby investigating the static stiffness, static characteristics, start-stop characteristics, and dynamic characteristics of the air foil thrust bearing 7. An optical microscope can be used to monitor the wear degree of the bearing foil surface in real time in situ, determining whether the bearing needs replacement or recoating to prevent damage due to excessive wear. Simultaneously, the thrust disk 6 has different bearing positioning holes to meet the installation requirements of air foil thrust bearings 7 with different inner and outer diameters, allowing for performance testing of air foil thrust bearings 7 with different diameters.

[0072] Static stiffness tests can be performed on single-layer foils of stacked air foil thrust bearings, as well as on the overall bearing. In investigating static, start-stop, and dynamic characteristics, an eddy current displacement sensor measures the bearing's axial displacement, a pressure sensor obtains the bearing's axial load, and a tension sensor measures the deflection of the air foil thrust bearing 7. The frictional torque is obtained using the lever principle. Because the frictional torque of the air foil thrust bearing 7 is very small, some current testing systems lack sufficient accuracy in measuring it. However, this device, when measuring the frictional torque of the air foil thrust bearing 7, pre-tightens the spring by adjusting the position of the lifting ring, thus providing a certain initial value to the tension sensor and improving the sensor's sensitivity and accuracy.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A multifunctional precision experimental device for air foil thrust bearings, characterized in that, Includes a base (1), on which the following modules are included: Support module: used to support rotor (2), with an air foil thrust bearing (7) provided at the first end of rotor (2); Drive module: Located at the first end of the rotor (2), it is connected to the air foil thrust bearing (7) and provides rotational power; Static loading module: used to drive the support module and rotor (2) axially closer to or further away from the drive module and provide static loading force; Dynamic loading module: used for detachable docking with the second end of the rotor (2) and providing dynamic loading force; Measurement module: Set for the air foil thrust bearing (7), used to measure the axial displacement, axial force, friction torque and wear of the air foil thrust bearing (7); The support module includes a slide (3) and a linear bearing (4); The slide (3) is provided with a bearing seat (5), the bearing seat (5) is provided with the linear bearing (4), and the rotor (2) passes through the linear bearing (4); The first end of the rotor (2) is provided with a thrust disk (6), and the air foil thrust bearing (7) is provided on the disk surface of the thrust disk (6); The measuring module includes a lifting eye bolt (22), a first tension spring (23), a second tension spring (24), and a second tension sensor (25); the lifting eye bolt (22) is fixed to the thrust plate (6), the inner ends of the first tension spring (23) and the second tension spring (24) are respectively connected to the lifting eye bolt (22), the outer end of the first tension spring (23) is connected to the slide (3), the second tension spring (24) is connected to the slide (3) through the second tension sensor (25), and the line where the second tension spring (24) and the second tension sensor (25) are located is perpendicular to the lifting eye bolt (22); The measurement module also includes a pole (26), a suspension rod (27), a support rod (8), and an optical microscope; The lower end of the upright (26) is fixed to the slide (3) on one side of the air foil thrust bearing (7). The upper part of the upright (26) is hinged to the first end of the suspension rod (27). The middle part of the upright (26) is hinged to the first end of the support rod (8). The second end of the support rod (8) is hinged obliquely upward to the suspension rod (27). The second end of the suspension rod (27) is provided with the optical microscope.

2. The multifunctional precision experimental device for air foil thrust bearings according to claim 1, characterized in that: The thrust plate (6) has several sets of positioning holes distributed at different distances from the center, and screws for fixing the air foil thrust bearing (7) are fitted in the positioning holes.

3. The multifunctional precision experimental device for air foil thrust bearings according to claim 1, characterized in that: The drive module includes a drive motor (9) and a drive disk (10). The drive motor (9) is disposed on the base (1). The drive disk (10) is disposed at the output end of the drive motor (9). The drive disk (10) is disposed corresponding to the air foil thrust bearing (7).

4. The multifunctional precision experimental device for air foil thrust bearings according to claim 1, characterized in that: The static loading module includes a slide rail (11), a ball screw (12), and a nut (13); The slide rail (11) and the ball screw (12) are arranged side by side on the base (1). The slide table (3) is slidably engaged with the slide rail (11). The nut (13) is threadedly engaged with the ball screw (12). The nut (13) is fixed to the slide table (3) through a nut seat. The ball screw (12) is driven by a loading motor (14).

5. The multifunctional precision experimental device for air foil thrust bearings according to claim 1, characterized in that: The dynamic loading module includes a first pressure sensor (15), an electromagnetic vibrator (16), and a connecting cylinder (17). The first pressure sensor (15) is disposed at the second end of the rotor (2). The two ends of the connecting cylinder (17) are respectively provided with internal threads. The two ends of the connecting cylinder (17) are respectively adapted to the output end of the electromagnetic vibrator (16) and the first pressure sensor (15) through the internal threads.

6. The multifunctional precision experimental device for air foil thrust bearings according to claim 5, characterized in that: The connecting cylinder (17) is provided with an external thread, and the external thread is adapted to a static-dynamic conversion sleeve (18). The slide (3) is provided with a static-dynamic conversion base (19). The static-dynamic conversion base (19) is located on the side closer to the electromagnetic vibrator (16) relative to the static-dynamic conversion sleeve (18). After the static-dynamic conversion sleeve (18) rotates, it abuts against the static-dynamic conversion base (19).

7. The multifunctional precision experimental device for air foil thrust bearings according to claim 1, characterized in that: The measurement module includes a bracket (20) and several eddy current sensors (21). The eddy current sensors (21) are mounted on the slide table (3) above the bracket (20). Each eddy current sensor (21) is evenly distributed around the circumference of the thrust disk (6).

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