Dynamic characteristic experiment table for actively controlling sliding bearing

Abstract

The invention discloses a dynamic characteristic experiment table for actively controlling a sliding bearing, belongs to the technical field of bearing dynamic characteristic detection, and aims to overcome the defects that when an existing sliding experiment table is used for loading, static load simulation is single, dynamic changes are difficult to adapt, and dynamic and static combined loads under real and complex working conditions cannot be simulated. The top of the bottom supporting plate is provided with a supporting module used for bearing a sliding bearing. A driving module used for driving the sliding bearing to rotate is arranged on the side portion of the supporting module. A static load loading module for applying a static load to the sliding bearing is mounted on the supporting module; a dynamic load loading module for applying a dynamic load to the sliding bearing is arranged in front of the supporting module; the output load of the dynamic load loading module acts on the sliding bearing through the static load loading module. The main function of the invention is to obtain the dynamic coefficient of the bearing through the measured force data by applying the static load and the dynamic load to the bearing.

Description

Technical Field

[0001] This invention belongs to the field of bearing dynamic characteristic testing technology, specifically relating to an experimental platform for the dynamic characteristics of actively controlled sliding bearings. Background Technology

[0002] As a core supporting component in rotating machinery (such as steam turbines, compressors, and centrifugal pumps), the dynamic characteristics of sliding bearings—namely, their stiffness coefficient and damping coefficient—directly determine the stability, critical speed, and vibration response of the rotor system. Accurately obtaining the dynamic characteristic parameters of sliding bearings is crucial for the design, condition monitoring, and fault diagnosis of high-performance rotating machinery. The sliding bearing dynamic characteristic test bench is a core device used to simulate actual working conditions and accurately measure these key parameters in a laboratory environment.

[0003] Currently, existing sliding bearing dynamic characteristic test benches typically consist of a drive system, a rotor system, a bearing housing, a loading system, and a data acquisition and analysis system. Their basic working principle is as follows: a drive motor rotates a rigid or flexible rotor, which is supported by the sliding bearing under test. To identify its dynamic characteristics, the test bench needs to apply a known, controllable micro-amplitude excitation (perturbation) to the bearing or rotor, while simultaneously measuring the system's response (such as displacement and acceleration). Finally, the dynamic characteristic parameters of the bearing are calculated using system identification theory (such as the transfer function method).

[0004] The loading systems in existing sliding bearing dynamic characteristic test benches are mainly mechanical or hydraulic static loading systems: a static force is applied to the bearing housing through levers, weights, or hydraulic cylinders to simulate the rotor weight or constant loads present in the unit. This load remains constant during the test and is used to set the static operating point of the bearing.

[0005] The sliding bearing dynamic characteristic test bench with the above loading method has a significant drawback: it cannot apply time-varying dynamic and static composite loads that can simulate real complex working conditions to the bearing under test.

[0006] Traditional static loading devices (such as weights or hydraulic cylinders with fixed pressure) cannot be quickly and accurately changed in size and direction during experiments once set. This makes it impossible for experiments to simulate the dynamic changes of static loads caused by changes in operating conditions (such as speed increase / decrease or load variation) in actual units. The measured dynamic characteristic parameters only correspond to a fixed static operating point and cannot reflect the influence of load changes on bearing performance.

[0007] In summary, existing sliding bearing dynamic characteristic test benches are functionally limited, and their load environment is "static" or "quasi-static," which is seriously inconsistent with the "combined dynamic and static loads" that sliding bearings experience under actual complex working conditions. This deficiency greatly restricts the research capabilities of the test bench, preventing it from being used to conduct performance verification and research on advanced actively controlled sliding bearings (such as piezoelectric ceramic actuators, electromagnetic actuators, and controllable lubricating oil film bearings) in suppressing harmful vibrations and adapting to varying working conditions. Therefore, developing an actively controlled sliding bearing dynamic characteristic test bench capable of independently and accurately applying static and dynamic loads and achieving combined static and dynamic loads has become an urgent technical problem to be solved in this field. Summary of the Invention

[0008] In order to solve the shortcomings of existing sliding test benches in simulating static loads, which are limited to static loads and cannot adapt to dynamic changes, and cannot simulate combined static and dynamic loads under real complex working conditions, this invention provides an active control test bench for the dynamic characteristics of sliding bearings.

[0009] An experimental platform for the dynamic characteristics of an actively controlled sliding bearing, the platform including a bottom support plate;

[0010] A support module for supporting the sliding bearing is installed on the top of the bottom support plate;

[0011] The side of the support module is equipped with a drive module for driving the inner ring of the sliding bearing to rotate;

[0012] The support module is equipped with a static load loading module for applying static loads to the sliding bearing;

[0013] A dynamic load loading module for applying dynamic loads to the sliding bearing is provided in front of the support module;

[0014] The output load of the dynamic load loading module is applied to the sliding bearing through the static load loading module;

[0015] Furthermore, the support module includes a bearing housing for mounting on the top of the bottom support plate, a rotor for supporting a sliding bearing is inserted in the bearing housing, the sliding bearing is disposed inside the bearing housing and fitted onto the rotor, both ends of the rotor extend to the outside of the bearing housing, a static load loading module is fitted onto the outside of the bearing housing and mounted on the rotor, and the power output end of the drive module is connected to one end of the rotor.

[0016] Furthermore, the drive module includes a motor bracket for mounting on top of the bottom support plate, on which a motor is mounted, and the motor's power output shaft is connected to the rotor via a drive belt assembly.

[0017] Furthermore, the transmission belt assembly includes a drive pulley mounted on the power output shaft of the motor and a driven pulley mounted on the rotor. A transmission belt is mounted on the drive pulley and the driven pulley, and the drive pulley drives the driven pulley to rotate synchronously through the transmission belt.

[0018] Furthermore, the driven pulley includes a pulley body for engaging with the drive belt, and a drive belt side retaining ring is detachably connected to each end of the pulley body;

[0019] Furthermore, the static load loading module includes two vibrating arms for mounting on the support module. The two vibrating arms are respectively fitted at both ends of the rotor, and each vibrating arm is rotatably connected to the rotor through a No. 1 rotary bearing. The two vibrating arms are provided with connecting rods at the ends closer to the dynamic load loading module. The two ends of the connecting rods are detachably connected to one of the vibrating arms, and the top of the connecting rods is in close contact with the load output end of the dynamic load loading module. The two vibrating arms are provided with positioning shafts at the ends away from the dynamic load loading module. The two ends of the positioning shafts are respectively inserted into one of the vibrating arms, and each vibrating arm is rotatably connected to the positioning shaft through a No. 2 rotary bearing. A fixed connecting block is fitted on the positioning shaft, and the fixed connecting block is detachably connected to the bearing seat by bolts.

[0020] Furthermore, a weight is attached to the bottom of the connecting rod;

[0021] Furthermore, the dynamic load loading module includes a support frame and a vibrator for mounting on the bottom support plate. The vibrator is fixed to the top of the support frame by a mounting base, and the load output end of the vibrator is in close contact with the top of the connecting rod.

[0022] Furthermore, a force sensor is installed at the load output end of the dynamic load loading module;

[0023] Furthermore, the top of the bottom support plate is machined with multiple T-slots for connecting the various components.

[0024] The beneficial effects of this application compared to the prior art are:

[0025] 1. The dynamic characteristic test bench for actively controlling sliding bearings provided in this application can effectively solve the core problem of "inability to apply time-varying static-dynamic composite loads simulating real complex working conditions," achieving consistency between the load environment and actual working conditions. This solution completely overcomes this limitation through the collaborative design of static load loading module and dynamic load loading module. The static load is provided by the static load loading module: the magnitude of the static load is precisely adjusted by the weight block hanging at the bottom of the connecting rod (the amplitude of the static load can be changed by adding or removing the weight block), and the vibrating arm is rotatably connected to the positioning shaft through the second rotating bearing and to the rotor through the first rotating bearing, ensuring that the static load always acts stably on the bearing seat (and is then transmitted to the sliding bearing), forming a reliable "static offset load." The dynamic load is provided by the dynamic load loading module: the exciter at the top of the support frame is fixed by the mounting base, and its load output end is in close contact with the top of the connecting rod, which can output dynamic excitations of different frequencies and amplitudes according to experimental needs (such as simulating load fluctuations during unit acceleration and deceleration). The dynamic load is transmitted to the two vibrating arms through the connecting rod, and is connected to the static load at the other end of the vibrating arm through the "vibrating arm-bearing seat" connection. The structure achieves vector synthesis, and finally acts on the sliding bearing in the form of "dynamic and static composite load", which completely simulates the composite environment of "static load (rotor weight) + dynamic load (operating condition fluctuation)" borne by the bearing in actual rotating machinery, and solves the defect that the existing load environment is seriously inconsistent with the actual operating conditions.

[0026] 2. The dynamic characteristic test bench for actively controlling sliding bearings provided in this application can also solve the problem of "the inability to quickly and accurately change the size and direction of the load", realizing flexible control and accurate monitoring of load parameters. Static load adjustment does not require disassembly of the structure. The size of the static load can be quickly changed by simply adding or removing the weights hanging on the connecting rod. Compared with traditional lever weight loading, it is more efficient. Moreover, the specifications of the weights can be standardized to ensure the accuracy of the static load. Dynamic load control is based on the exciter as the dynamic load output source. The frequency, amplitude and waveform (such as sine wave and pulse wave) of the dynamic excitation can be adjusted in real time through an external control system to meet the simulation requirements of different "variable working conditions". At the same time, the force sensor installed at the output end of the dynamic load module can collect dynamic load data in real time to form a closed-loop monitoring, avoiding the problems of "no feedback and difficult calibration" in traditional loading. Through the rotational connection between the vibrating arm and the rotor and positioning shaft (rotating bearings No. 1 and No. 2), only the vibrating arm is allowed to swing around the axis without generating additional lateral offset. This ensures that both dynamic and static loads are transmitted to the bearings in a preset direction (perpendicular to the rotor axis) to avoid measurement errors caused by load direction offset.

[0027] 3. The dynamic characteristic test bench for actively controlled sliding bearings provided in this application improves the practicality of the equipment through modular design and detailed optimization. The T-slot design of the bottom support plate allows all modules (motor bracket of the drive module, bearing seat of the support module, and support frame of the dynamic load module) to be detachably installed through the T-slot, which facilitates the adjustment of the position of each module according to experimental needs (such as adjusting the contact position between the vibrator and the connecting rod, and the transmission distance between the motor and the rotor), or replacing different specifications of components (such as different models of sliding bearings and vibrators). The optimization of the transmission belt assembly: the detachable side retaining rings of the transmission belt at both ends of the driven pulley can prevent the transmission belt from falling off during high-speed transmission, ensuring the transmission stability of the drive module (motor-transmission belt-rotor) and reducing the probability of experimental failure. The structure of the static load module is simplified: the detachable connection between the vibration arm and the connecting rod (such as bolt connection) facilitates maintenance or replacement of damaged parts and reduces equipment maintenance costs. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the dynamic characteristic test bench described in this application;

[0029] Figure 2 This is a front view schematic diagram of the dynamic characteristic test bench described in this application;

[0030] Figure 3 This is a left-side view of the dynamic characteristic test bench described in this application;

[0031] Figure 4 This is a right-side schematic diagram of the dynamic characteristic test bench described in this application;

[0032] Figure 5 This is a top view of the dynamic characteristic test bench described in this application;

[0033] Figure 6 This is a schematic diagram of the support module in the dynamic characteristic test bench described in this application;

[0034] Figure 7 This is an exploded view of the static load loading module in the dynamic characteristic test bench described in this application;

[0035] Figure 8 This refers to the drive module in the dynamic characteristic test bench described in this application.

[0036] Figure 9 This is an exploded view of the dynamic load loading module in the dynamic characteristic test bench described in this application.

[0037] Figure 1 shows the bottom support plate;

[0038] 2 Support module, 21 Lower housing of bearing housing, 22 Upper housing of bearing housing, 23 Oil housing, 24 Rotor, 25 Oil pipe, 26 No. 1 rotating bearing, 27 Wave spring washer, 28 No. 1 inner nut, 29 No. 1 outer nut, 210 No. 2 rotating bearing, 211 No. 2 inner nut and 212 No. 2 outer nut;

[0039] 3 Drive module, 31 Motor bracket, 32 Motor, 33 Drive pulley, 34 Transmission belt, 35 Driven pulley, 351 Pulley body and 352 Transmission belt side retaining ring;

[0040] 4. Static load loading module, 41. Vibration arm, 42. Connecting rod, 43. Positioning shaft, and 44. Fixed connecting block;

[0041] 5. Dynamic load loading module, 51. Support frame, 52. Mounting base and 53. Vibrator;

[0042] 6. Sliding bearings;

[0043] 7. Force sensor. Detailed Implementation

[0044] Specific implementation method one: Combining Figures 1 to 9 This embodiment describes an experimental platform for the dynamic characteristics of actively controlled sliding bearings. The platform includes a bottom support plate 1.

[0045] A support module 2 for supporting the sliding bearing 6 is installed on the top of the bottom support plate 1;

[0046] The side of the support module 2 is provided with a drive module 3 for driving the inner ring of the sliding bearing 6 to rotate;

[0047] The support module 2 is equipped with a static load loading module 4 for applying static load to the sliding bearing 6;

[0048] A dynamic load loading module 5 for applying dynamic loads to the sliding bearing 6 is provided in front of the support module 2;

[0049] The output load of the dynamic load loading module 5 is applied to the sliding bearing 6 through the static load loading module;

[0050] The support module 2 includes a bearing housing for mounting on the top of the bottom support plate 1. A rotor 24 for supporting a sliding bearing 6 is inserted in the bearing housing. The sliding bearing 6 is disposed in the bearing housing and fitted onto the rotor 24. Both ends of the rotor 24 extend to the outside of the bearing housing. The static load loading module 4 is fitted onto the outside of the bearing housing and mounted on the rotor 24. The power output end of the drive module 3 is connected to one end of the rotor 24.

[0051] Drive module 3 includes a motor bracket 31 for mounting on the top of bottom support plate 1, a motor 32 mounted on the motor bracket 31, and the power output shaft of the motor 32 connected to the rotor 24 via a transmission belt assembly.

[0052] The static load loading module 4 includes two vibrating arms 41 for mounting on the support module 2. The two vibrating arms 41 are respectively fitted at both ends of the rotor 24, and each vibrating arm 41 is rotatably connected to the rotor 24 through a first rotating bearing 26. A connecting rod 42 is provided on the end of the two vibrating arms 41 near the dynamic load loading module 5. The two ends of the connecting rod 42 are detachably connected to one of the vibrating arms 41, and the top of the connecting rod 42 is in close contact with the load output end of the dynamic load loading module 5. A positioning shaft 43 is provided on the end of the two vibrating arms 41 away from the dynamic load loading module 5. The two ends of the positioning shaft 43 are respectively inserted into one of the vibrating arms 41, and each vibrating arm 41 is rotatably connected to the positioning shaft 43 through a second rotating bearing 210. A fixed connecting block 44 is fitted on the positioning shaft 43, and the fixed connecting block 44 is detachably connected to the bearing seat by bolts. A weight block is hung at the bottom of the connecting rod 42.

[0053] The dynamic load loading module 5 includes a support frame 51 and a vibrator 53 for mounting on the bottom support plate 1. The vibrator 53 is fixed to the top of the support frame 51 by a mounting base 52, and the load output end of the vibrator 53 is in close contact with the top of the connecting rod 42. A force sensor 7 is installed at the load output end of the vibrator 53.

[0054] This embodiment provides a dynamic characteristic test bench for an actively controlled sliding bearing, used to measure the dynamic characteristics of the actively controlled sliding bearing during operation. The actively controlled sliding bearing is equipped with a displacement sensor to measure the axial displacement of the rotor 24 at the bearing position. This application adopts a modular design concept, achieving consistency between the load environment and actual working conditions through the coordinated design of static load loading modules and dynamic load loading modules. The support module 2 is the main component supporting the tested sliding bearing. The support module 2 mainly consists of a bearing housing and a rotor 24. The bearing housing is a split structure, including a lower bearing housing shell 21 and an upper bearing housing shell 22. The inner sides of the housing 21 and the upper housing 22 of the bearing housing are machined with grooves that correspond to the sliding bearing 6. The upper housing 22 of the bearing housing is fastened to the top of the lower housing 21 of the bearing housing and fixedly connected to the lower housing 21 of the bearing housing with bolts to form the main body of the bearing housing. Oil shells 23 can also be detachably connected to both sides of the main body of the bearing housing. Each oil shell 23 is provided with an oil pipe 25. One end of the oil pipe 25 is connected to the oil inlet end of the sliding bearing 6, and the other end of the oil pipe 25 is connected to an external oil supply pipeline. In order to further ensure the lubrication of the sliding bearing during the experiment, a connected oil shell structure is also provided on the top of the upper housing 22 of the bearing housing, which can also lubricate the sliding bearing 6 through the oil pipe.

[0055] The drive module 3 is mainly used to drive the rotor 24 and the inner ring of the sliding bearing to rotate synchronously. The drive module 3 uses the motor 32 as the drive source and is connected to one end of the rotor 24 through the transmission belt assembly. The transmission belt assembly includes a drive pulley 33 mounted on the power output shaft of the motor 32 and a driven pulley 35 mounted on the rotor 24. The drive pulley 33 and the driven pulley 35 are mounted with a transmission belt 34. The drive pulley 33 drives the driven pulley 35 to rotate synchronously through the transmission belt 34.

[0056] The static load loading module 4 and the dynamic load loading module 5 are important components of this application. The static load loading module 4 serves as the static load application device for the sliding bearing and also as the medium for the dynamic load loading module 5 to apply dynamic load to the sliding bearing. In the static load loading module 4, each vibrating arm 41 is mounted on the rotor 24 via a first rotating bearing 26. One end of the first rotating bearing 26 is positioned by the shoulder of the rotor 24, and the other end is positioned by an inner nut 28 and an outer nut 29. The inner nut 28 is detachably threaded to the rotor, and the outer nut 29 is detachably threaded to the corresponding vibrating arm 41. The outer nut 29 is also detachably threaded to the corresponding first rotating bearing. A wave spring washer 27 is also provided between 26. A connecting rod 42 is provided at the front end of the two vibrating arms 41. The connecting rod 42 is used to contact the load output end of the dynamic load loading module 5 and transmit the dynamic load to the sliding bearing 6 through the static load loading module 4 and the rotor 24. A positioning shaft 43 is provided at the rear end of the two vibrating arms 41. The positioning shaft 43 is fixed to the back side of the bearing seat by a fixed connecting block 44. The fixed connecting block 44 ensures the stability of the positioning shaft 43 during operation. A hook for hanging a weight block is provided at the bottom of the connecting rod 42. The weight block can be adjusted according to the actual situation. Multiple static working points can be set (such as simulating static loads corresponding to different rotor counterweights and different rated loads of the unit). This is for studying the effect of static load magnitude on bearing stiffness / The influence of damping coefficient provides an experimental basis. The exciter 53 in the dynamic load loading module 5 can be selected as an exciter with an excitation force of 500N, which is used to apply dynamic excitation force. In order to further control the applied value of dynamic load to determine experimental parameters, a force sensor 7 is also provided on the load output end of the exciter 53. The force sensor 7 can directly transmit the excitation force to the central control computer to improve the accuracy of subsequent measurement of the dynamic coefficient of sliding bearing. In this embodiment, through the flexible combination of dynamic excitation and static working point, each static working point can be superimposed with dynamic excitation with different parameters (such as low amplitude high frequency excitation to simulate vibration disturbance, high amplitude low frequency excitation to simulate sudden change in working condition), realizing the combined test of "multiple static working points + multiple dynamic excitation", which fully restores the complex scenario of "variable static load + variable dynamic disturbance" in the actual unit, thereby obtaining the dynamic characteristic parameters of the bearing under different load combinations, revealing the influence law of load change on bearing performance, and solving the defect of "single research dimension" of existing experimental platform. At the same time, the "adjustable static load + controllable dynamic load" provided by this solution The composite environment can accurately simulate the load conditions faced by such bearings in actual applications (such as the need to adjust the driving force of piezoelectric ceramic bearings under dynamic vibration load). During the experiment, the dynamic load parameters of the exciter can be adjusted (such as increasing the disturbance amplitude and changing the disturbance frequency) to simulate "harmful vibration conditions" and at the same time test the response effect of the actively controlled bearing (such as whether the dynamic disturbance can be offset by the actuator).By simulating "static load variation conditions" by changing the mass of the weight block, the adaptability of actively controlled bearings to variable static loads was verified—filling a gap in the existing experimental platform for testing advanced actively controlled bearings and promoting the research and development of this technology.

[0057] Specific Implementation Method Two: Combining Figure 4 This embodiment differs from specific embodiment one in that the driven pulley 35 includes a pulley body 351 for cooperating with the transmission belt 34, and a transmission belt side retaining ring 352 is detachably connected to each end of the pulley body 351. Other components and connections are the same as in specific embodiment one.

[0058] In this embodiment, the driven pulley 35 and the driving pulley 33 have the same structure, both consisting of a pulley body and side retaining rings of the transmission belt at both ends. The advantage of this design is that it can prevent the transmission belt from falling off during high-speed transmission, ensure the transmission stability of the drive module (motor-transmission belt-rotor), and reduce the probability of experimental failure.

[0059] Specific implementation method three: Combining Figures 1 to 5 This embodiment differs from Specific Embodiment Two in that the top of the bottom support plate 1 is machined with multiple T-slots for connecting the various components. Other components and connection methods are the same as in Specific Embodiment Two.

[0060] This design allows for detachable installation via T-slots, facilitating adjustments to the positions of modules according to experimental needs (such as adjusting the contact position between the vibrator and the connecting rod, or the transmission distance between the motor and the rotor), or replacement of components of different specifications (such as different models of sliding bearings or vibrators).

[0061] The present invention has been disclosed above with preferred embodiments, but it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed structure and technical content to create equivalent embodiments without departing from the scope of the present invention. However, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

[0062] Working principle

[0063] Before operation, the experimental bench for the dynamic characteristics of an actively controlled sliding bearing provided in this application first selects a rotor 24, bearing housing, oil pipe 25, vibrating arm 41, weight block, and exciter 53 with appropriate parameters based on the parameters of the sliding bearing 6 to be tested. Then, the selected components are assembled together with other components according to the connection relationship in the specific embodiment. During operation, the motor 32 is started first, and the motor 32 drives the rotor 24 to rotate through the conveyor belt assembly. At the same time, the weight block applies a static load to the rotor system composed of the rotor 24 and the sliding bearing 6 through the vibrating arm 41. The exciter 53 applies a dynamic load to the rotor system composed of the rotor 24 and the sliding bearing 6 through the connecting rod 42 and the vibrating arm 41. The dynamic coefficient of the sliding bearing 6 under test during operation is obtained by measuring the force data and displacement data recorded by the force sensor 7 and the displacement sensor in the actively controlled sliding bearing.

Claims

1. An experimental platform for the dynamic characteristics of actively controlled sliding bearings, characterized in that: The experimental platform includes a bottom support plate (1); A support module (2) for supporting the sliding bearing (6) is installed on the top of the bottom support plate (1). The side of the support module (2) is provided with a drive module (3) for driving the inner ring of the sliding bearing (6) to rotate. A static load loading module (4) for applying static load to the sliding bearing (6) is installed on the support module (2); A dynamic load loading module (5) for applying dynamic load to the sliding bearing (6) is provided in front of the support module (2); The output load of the dynamic load loading module (5) is applied to the sliding bearing (6) through the static load loading module.

2. The experimental platform for the dynamic characteristics of an actively controlled sliding bearing according to claim 1, characterized in that: The support module (2) includes a bearing housing for mounting on the top of the bottom support plate (1). A rotor (24) for supporting a sliding bearing (6) is inserted in the bearing housing. The sliding bearing (6) is set inside the bearing housing and fitted onto the rotor (24). Both ends of the rotor (24) extend to the outside of the bearing housing. The static load loading module (4) is fitted outside the bearing housing and mounted on the rotor (24). The power output end of the drive module (3) is connected to one end of the rotor (24).

3. The experimental platform for the dynamic characteristics of an actively controlled sliding bearing according to claim 2, characterized in that: The drive module (3) includes a motor bracket (31) for mounting on the top of the bottom support plate (1), on which a motor (32) is mounted, and the power output shaft of the motor (32) is connected to the rotor (24) via a transmission belt assembly.

4. The experimental platform for the dynamic characteristics of an actively controlled sliding bearing according to claim 3, characterized in that: The transmission belt assembly includes a drive pulley (33) mounted on the power output shaft of the motor (32) and a driven pulley (35) mounted on the rotor (24). A transmission belt (34) is mounted on the drive pulley (33) and the driven pulley (35). The drive pulley (33) drives the driven pulley (35) to rotate synchronously through the transmission belt (34).

5. The experimental platform for the dynamic characteristics of an actively controlled sliding bearing according to claim 4, characterized in that: The driven pulley (35) includes a pulley body (351) for cooperating with the drive belt (34), and a drive belt side retaining ring (352) is detachably connected to each end of the pulley body (351).

6. The experimental platform for the dynamic characteristics of an actively controlled sliding bearing according to claim 5, characterized in that: The static load loading module (4) includes two vibrating arms (41) for mounting on the support module (2). The two vibrating arms (41) are respectively fitted on both ends of the rotor (24), and each vibrating arm (41) is rotatably connected to the rotor (24) through a No. 1 rotating bearing (26). A connecting rod (42) is provided on the end of the two vibrating arms (41) near the dynamic load loading module (5). The two ends of the connecting rod (42) are detachably connected to one of the vibrating arms (41), and the top of the connecting rod (42) is in close contact with the load output end of the dynamic load loading module (5). A positioning shaft (43) is provided on the end of the two vibrating arms (41) away from the dynamic load loading module (5). The two ends of the positioning shaft (43) are respectively inserted into one of the vibrating arms (41), and each vibrating arm (41) is rotatably connected to the positioning shaft (43) through a No. 2 rotating bearing (210). A fixed connecting block (44) is fitted on the positioning shaft (43), and the fixed connecting block (44) is detachably connected to the bearing seat by bolts.

7. The experimental platform for the dynamic characteristics of an actively controlled sliding bearing according to claim 6, characterized in that: A weight is attached to the bottom of the connecting rod (42).

8. The experimental platform for the dynamic characteristics of an actively controlled sliding bearing according to claim 7, characterized in that: The dynamic load loading module (5) includes a support frame (51) and a vibrator (53) for mounting on the bottom support plate (1). The vibrator (53) is fixed to the top of the support frame (51) by a mounting base (52), and the load output end of the vibrator (53) is in close contact with the top of the connecting rod (42).

9. The experimental platform for the dynamic characteristics of an actively controlled sliding bearing according to claim 8, characterized in that: A force sensor (7) is installed at the load output end of the dynamic load loading module (5).

10. The experimental platform for the dynamic characteristics of an actively controlled sliding bearing according to claim 9, characterized in that: The top of the bottom support plate (1) is machined with multiple T-slots for connecting the various components.

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