A high temperature oscillating friction and wear testing machine for shaft bushing with radial integrated loading

Abstract

The application discloses a shaft radial integrated loading rotating shaft bushing high-temperature swing friction and wear testing machine and belongs to the technical field of friction and wear testing. The application adopts the above-mentioned shaft radial integrated loading rotating shaft bushing high-temperature swing friction and wear testing machine, synchronous application of axial load and radial load is realized through collaborative control of double stepping motors in the loading module; meanwhile, the influence of the coupling on torque measurement is effectively eliminated through the self-designed coupling, and the precision of synchronous application is improved.

Description

Technical Field

[0001] This invention belongs to the field of friction and wear testing technology, specifically relating to a high-temperature oscillating friction and wear testing machine for a rotating shaft bushing with integrated axial and radial loading. Background Technology

[0002] As one of the core components of an aero-engine, the performance of the high-pressure compressor directly affects the engine's efficiency and stability. Among them, the Variable Stator Vane (VSV) is an important part of the high-pressure compressor. Its function is to adjust the angle of the stator blades to adapt to changes in airflow under different operating conditions, thereby optimizing the inlet airflow angle, improving the compressor's stability and efficiency, and preventing surge.

[0003] Each stator blade in the VSV system is mounted on the compressor casing via a rotating shaft and is rotatably connected by a bushing. In actual aero-engine operation, the aerodynamic loads on the rotating shaft exhibit multi-directional coupling characteristics, such as the superposition of radial offset force caused by airflow eccentricity and axial force generated by strong airflow impact. However, existing related patents and testing technologies still have the following shortcomings:

[0004] For example, patent application CN201711446429.3 discloses a temperature-controlled friction and wear testing machine suitable for rotating pairs. This device can achieve radial loading and control the test temperature through a heating device. However, its loading structure is a planar concentric structure, which can only provide radial loading in a single direction and cannot meet the requirements of axial / radial composite loading. Patent application CN202310507171.2 discloses a friction and wear testing system for moving pairs of aircraft tail nozzles. Although it achieves the synthesis of horizontal and vertical loading, it is essentially still within the scope of radial loading and does not involve axial loading. In addition, patent application CN202011271048.8 discloses a friction and wear testing bench for moving pairs of compressor stator blade adjustment mechanism. It can achieve reciprocating swing function and adjust the swing angle through a linkage mechanism, but it lacks the loading system and high-temperature environment simulation capability, making it difficult to truly reproduce the working state of the VSV system.

[0005] Therefore, a new device is urgently needed. Summary of the Invention

[0006] The purpose of this invention is to provide a high-temperature oscillating friction and wear testing machine for shaft bushings with integrated axial and radial loading. This device achieves synchronous application of axial and radial loads through the coordinated control of two stepper motors in the loading module. At the same time, the self-designed coupling effectively eliminates the influence of the coupling on torque measurement, thereby improving the accuracy of synchronous application.

[0007] To achieve the above objectives, the present invention provides a high-temperature oscillating friction and wear testing machine for a rotating shaft bushing with integrated axial and radial loading, comprising a base plate, a loading module disposed on the base plate, one side of the loading module being connected to a high-temperature clamping module, one side of the high-temperature clamping module being connected to a motion generation module, one side of the motion generation module being connected to an electrical control box, and one side of the electrical control box being connected to a control computer.

[0008] Preferably, the loading module includes a first stepper motor, a first motor bracket is provided on one side of the first stepper motor, the first stepper motor is mounted on the first motor bracket, a horizontal lead screw slide is provided on one side of the first motor bracket, the first stepper motor is connected to the horizontal lead screw slide through a coupling, a ball joint is installed on the horizontal lead screw slide, a second stepper motor is provided above the ball joint, a lead screw is provided above the second stepper motor, a lead screw bushing is connected to the upper end of the lead screw, a lead screw flange is provided on the upper side of the lead screw bushing, and a force sensor is provided above the lead screw flange.

[0009] Preferably, a vertical paper slide is provided above the force sensor, and an automatic ball alignment mechanism is provided above the vertical paper slide. One side of the automatic ball alignment mechanism is connected to a rotating shaft, and the calculation formulas for the axial and radial loads applied to the rotating shaft are as follows:

[0010] ;

[0011] in, Data measured by a force sensor; This is the rotational angular velocity of the first stepper motor; This is the rotation time of the first stepper motor; This is the coefficient corresponding to the horizontal movement distance of the horizontal lead screw slide and the rotation angle of the first stepper motor; The height difference between the rotating shaft and the horizontal lead screw slide; The angle between the applied force and the vertical direction; This refers to the axial load acting on the shaft. This represents the radial load on the shaft.

[0012] Preferably, the high-temperature clamp module includes an upper clamp, a lower clamp is disposed below the upper clamp, a left bushing and a right bushing are disposed between the upper clamp and the lower clamp, and the lower clamp is connected to the left bushing and the right bushing.

[0013] Preferably, an electric heating tube is provided below the lower clamp, a water-cooled box is provided below the electric heating tube, a water-cooled tube is provided inside the water-cooled box, a heat insulation plate is provided below the water-cooled box, a first shim is provided below the heat insulation plate, and a second shim is provided below the first shim.

[0014] Preferably, a cylindrical-cylindrical coupling is provided on one side of the lower clamp, and a rotating shaft is connected to one side of the cylindrical-cylindrical coupling. A cylindrical connecting block is provided on the other side of the cylindrical-cylindrical coupling. The cylindrical-cylindrical coupling and the cylindrical connecting block are connected by bolts. The top of the cylindrical connecting block is connected to a keyed cylindrical coupling via a pin key. The pin key is installed in the keyway of the connection between the cylindrical connecting block and the keyed cylindrical coupling. The other end of the cylindrical connecting block is coaxially connected to a linear bearing.

[0015] Preferably, the rotating shaft passes through the left bushing and the right bushing, and is connected to the motion generation module via the key, the key-cylindrical coupling, the cylindrical connecting block, the cylindrical-cylindrical coupling, the linear bearing.

[0016] Preferably, the motion generation module includes a motion platform, a lifting platform is provided below the motion platform, the lifting platform is fixedly connected to the motion platform, a third raising block is provided below the lifting platform, a second motor bracket is provided on the motion platform, the motion platform is fixedly connected to the second motor bracket, a servo motor is mounted on the second motor bracket, and a speed reducer is provided on one side of the servo motor.

[0017] Preferably, the servo motor is connected to the linkage mechanism via the speed reducer. The linkage mechanism includes a short rod, one end of which is connected to the output shaft of the speed reducer, and the other end of which is connected to one end of a cross rod via a pin. The other end of the cross rod is connected to one end of a long rod via a pin. A shim is installed at the connection between the short rod, the cross rod, and the long rod. The calculation formula for the function of the linkage mechanism is as follows:

[0018] ;

[0019] in, For the length of the short rod, The length of the crossbar. The length of the long rod, The horizontal distance between the fixed bottoms of the short and long poles is constant. The angle of the periodic reciprocating oscillation.

[0020] Preferably, the other end of the long rod is connected to the left bearing housing, one end of the left bearing housing is connected to the torque meter, and the other end of the torque meter is connected to the right bearing housing via a bearing housing coupling.

[0021] Therefore, the high-temperature oscillating friction and wear testing machine for shaft bushings with integrated axial and radial loading, as described above, has the following significant advantages compared with the prior art:

[0022] 1. This invention can simultaneously apply axial and radial loads, and precisely control the load magnitude and direction through stepper motors, lead screws, etc.; the automatic ball alignment mechanism can adapt to eccentric working conditions, ensuring loading accuracy and adaptability;

[0023] 2. This invention uses a cylindrical-cylindrical coupling, a cylindrical connecting block, and a pin-key cylindrical coupling to rigidly connect and ensure efficient torque transmission. It utilizes linear bearings to guide and accurately transmit axial load. The cylindrical connecting block has a small diameter at both ends and a large diameter in the middle to automatically compensate for coaxiality deviation and eliminate additional torque.

[0024] 3. The motion generation module of this invention precisely controls the reciprocating oscillating motion, and the torque meter accurately measures the friction torque; the testing machine has a high degree of integration and automation, meeting the specific testing requirements of aero-engine components.

[0025] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a high-temperature oscillating friction and wear testing machine for a rotating shaft bushing with integrated radial loading according to the present invention;

[0027] Figure 2 This is a schematic diagram of the loading module structure of a high-temperature oscillating friction and wear testing machine for a shaft bushing with integrated radial loading according to the present invention.

[0028] Figure 3 This is a schematic diagram of the automatic ball alignment mechanism of a high-temperature oscillating friction and wear testing machine for a shaft bushing with integrated radial loading according to the present invention.

[0029] Figure 4 This is a schematic diagram illustrating the calculation of axial and radial loads in a high-temperature oscillating friction and wear testing machine for a shaft bushing with integrated axial and radial loading according to the present invention.

[0030] Figure 5 This is a schematic diagram of the screw bushing structure of a high-temperature oscillating friction and wear testing machine with an integral radial loading shaft bushing according to the present invention.

[0031] Figure 6 This is a schematic diagram of the high-temperature fixture module structure of a high-temperature swing friction and wear testing machine for a shaft bushing with integrated radial loading according to the present invention.

[0032] Figure 7 This is a schematic diagram showing the relative positions of the shaft-bushing component and the fixture module in a high-temperature oscillating friction and wear testing machine for a shaft and bushing with integrated radial loading according to the present invention.

[0033] Figure 8This is a schematic diagram of the coupling structure of a high-temperature oscillating friction and wear testing machine for a shaft bushing with integrated radial loading according to the present invention.

[0034] Figure 9 This is a schematic diagram of the motion generation module structure of a high-temperature oscillating friction and wear testing machine for a shaft bushing with integrated radial loading according to the present invention.

[0035] Figure 10 This is a schematic diagram of the linkage mechanism of a high-temperature oscillating friction and wear testing machine for a shaft bushing with integrated radial loading according to the present invention. Figure 10 (a) in the diagram is a schematic diagram of the linkage mechanism. Figure 10 (b) in the diagram is a schematic diagram for calculating the length of the linkage mechanism.

[0036] Figure Labels

[0037] 1. Loading module; 101. First stepper motor; 102. First motor bracket; 103. Coupling; 104. Horizontal lead screw slide; 105. Second stepper motor; 106. Lead screw; 107. Flange; 108. Lead screw bushing; 109. Force sensor; 1010. Automatic ball alignment mechanism; 1011. Ball joint; 1012. Vertical paper slide;

[0038] 2. High-temperature fixture module; 201. Upper fixture; 202. Lower fixture; 203. Water-cooled box; 204. Water-cooled pipe; 205. Heat insulation plate; 206. First shim block; 207. Second shim block; 208. Heating element; 209. Pin key; 2010. Pin key cylindrical coupling; 2011. Cylindrical connecting block; 2012. Cylindrical-cylindrical coupling; 2013. Linear bearing; 2014. Left bushing; 2015. Right bushing; 2016. Rotating shaft;

[0039] 3. Motion generation module; 301. Lifting platform; 302. Third elevation block; 303. Right bearing seat; 304. Torque meter; 305. Left bearing seat; 306. Motion platform; 307. Speed ​​reducer; 308. Servo motor; 309. Second motor bracket; 310. Linkage mechanism; 3101. Short rod; 3102. Cross rod; 3103. Long rod; 3104. Shim; 311. Bearing seat coupling;

[0040] 4. Control computer; 5. Electrical control box; 6. Base plate. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Unless otherwise defined, the technical or scientific terms used in the present invention should have the ordinary meaning understood by those skilled in the art.

[0042] Example 1

[0043] like Figure 1 As shown, this invention discloses a high-temperature oscillating friction and wear testing machine for a rotating shaft bushing with integrated axial and radial loading. This machine is applied to the rotating shaft-bushing component of the adjustable stator blade mechanism in an aero-engine compressor, conducting high-temperature and axial-radial loading friction and wear tests. The machine includes a base plate 6, on which a loading module 1 is mounted. One side of the loading module 1 is connected to a high-temperature clamping module 2, and another side of the high-temperature clamping module 2 is connected to a motion generation module 3. One side of the motion generation module 3 is connected to an electrical control box 5, and one side of the electrical control box 5 is connected to a control computer 4. The electrical control box 5 integrates the entire testing machine's circuitry. The control computer 4 issues commands to control the operation of each part of the testing machine, realizing the control of the entire friction and wear test.

[0044] like Figures 2-5 The loading module 1 shown includes a first stepper motor 101, with a first motor bracket 102 mounted on one side of the first stepper motor 101. A horizontal lead screw slide 104 is mounted on one side of the first motor bracket 102, and the first stepper motor 101 is connected to the horizontal lead screw slide 104 via a coupling 103. A ball joint 1011 is mounted on the horizontal lead screw slide 104.

[0045] A second stepper motor 105 is mounted above the ball joint 1011, and a lead screw 106 is mounted above the second stepper motor 105. A lead screw bushing 108 is connected to the upper end of the lead screw 106, and a lead screw flange 107 is mounted on the upper side of the lead screw bushing 108. A force sensor 109 is mounted above the lead screw flange 107. During operation, the second stepper motor 105 drives the lead screw 106 to rotate. The lead screw bushing 108 converts the circular motion of the lead screw 106 into axial linear motion. The lead screw bushing 108 then drives the lead screw flange 107 to perform axial linear motion, thereby achieving force loading. The force sensor 109 is used to accurately measure the resultant force load and ensure the force control accuracy during the loading process.

[0046] A vertical paper slide 1012 is positioned above the force sensor 109, and an automatic ball alignment mechanism 1010 is positioned above the vertical paper slide 1012. A rotating shaft 2016 is positioned on one side of the automatic ball alignment mechanism 1010, and the automatic ball alignment mechanism 1010 is connected to the rotating shaft 2016. The automatic ball alignment mechanism 1010 has two balls at its top, which are connected to the vertical paper slide 1012 at its bottom via ball joints 1011. This allows the automatic ball alignment mechanism 1010 to automatically adjust its position if there is any eccentricity when a loading force is applied to the rotating shaft 2016, ensuring that both balls are tangent to the rotating shaft 2016, without affecting the loading operation in the vertical direction.

[0047] The loading module decouples horizontal displacement (driven by the first stepper motor) from vertical loading (driven by the second stepper motor) through a linkage structure of ball joint and lead screw slide, allowing axial and radial loads to be adjusted independently without interference. Figure 3 As shown, the automatic ball alignment mechanism can still ensure the load direction accuracy under eccentric conditions through the double-ball adaptive contact shaft.

[0048] When the first stepper motor 101 rotates, it drives the horizontal lead screw slide 104 to move via the coupling 103, thereby adjusting the vertical angle of the automatic ball alignment mechanism 1010. The automatic ball alignment mechanism 1010, together with the horizontal lead screw slide 104 and the vertical lead screw 106, works in concert to achieve precise control over the simultaneous application of axial and radial loads to the rotating shaft 2016, as well as the magnitude of the loads. The precise calculation formulas for the axial and radial loads are as follows:

[0049] ;

[0050] in, Data measured by force sensor 109; This refers to the rotational angular velocity of the first stepper motor 101; This refers to the rotation time of the first stepper motor 101; The coefficient corresponding to the horizontal movement distance of the horizontal lead screw slide 104 and the rotation angle of the first stepper motor 101 can be obtained through previous calibration and is a constant coefficient. The height difference between the rotating shaft 2016 and the horizontal lead screw slide 104 can be measured in advance and is a fixed coefficient. The angle between the applied force and the vertical direction; The axial load on the rotating shaft 2016; This refers to the radial load on the rotating shaft 2016.

[0051] like Figures 6-8As shown, the high-temperature clamp module 2 includes an upper clamp 201, a lower clamp 202 is provided below the upper clamp 201, a left bushing 2014 and a right bushing 2015 are provided between the upper clamp 201 and the lower clamp 202, and the lower clamp 202 is connected to the left bushing 2014 and the right bushing 2015 respectively.

[0052] A heating element 208 is installed below the lower clamp 202 to create a high-temperature environment. A water-cooled chamber 203 is installed below the heating element 208, and a water-cooling pipe 204 is installed inside the water-cooled chamber 203. The water-cooled chamber 203 achieves circulating cooling through the water-cooling pipe 204. A heat insulation plate 205 is installed below the water-cooled chamber 203 to assist in temperature control; the temperature control box precisely controls the temperature within the electrical control box 5. A first raising block 206 is installed below the heat insulation plate 205, and a second raising block 207 is installed below the first raising block 206. By setting the first raising block 206 and the second raising block 207 with different thicknesses, the height of the heat insulation plate 205 can be flexibly adjusted to meet the spatial layout and installation position requirements of different components inside the testing machine, enabling precise alignment of each component in three-dimensional space. Meanwhile, the raised blocks can assist in heat insulation to a certain extent, reduce heat loss through bottom conduction, and provide stable support for the heat insulation plate 205, ensuring that the heat insulation plate 205 will not be displaced or deformed due to external forces (such as vibration) during the operation of the testing machine, thus ensuring the stability of the heat insulation effect and the stability of the entire high-temperature fixture module 2 structure.

[0053] A cylindrical coupling 2012 is installed on one side of the lower clamp 202. A rotating shaft 2016 is connected to one side of the cylindrical coupling 2012, and a cylindrical connecting block 2011 is installed on the other side. The cylindrical coupling 2012 and the cylindrical connecting block 2011 are connected by bolts, enabling torque transmission from the rotating shaft 2016 to the cylindrical connecting block 2011. A key 209 is installed in the keyway of the connection between the cylindrical connecting block 2011 and the keyed cylindrical coupling 2010 to prevent relative rotation between them and ensure accurate torque transmission.

[0054] The other end of the cylindrical connecting block 2011 is coaxially connected to the linear bearing 2013. The cylindrical connecting block 2011 and the inner ring of the linear bearing 2013 are positioned by an interference fit, so that the axial movement of the cylindrical connecting block 2011 is precisely constrained by the linear bearing 2013, avoiding unnecessary offset during loading and ensuring that the axial loading force can be accurately applied to the rotating shaft 2016.

[0055] The cylindrical-cylindrical coupling 2012 plays a crucial role in connecting the rotating shaft 2016 and the cylindrical connecting block 2011, ensuring torque transmission. The cylindrical connecting block 2011 employs a symmetrical structure with small diameters at both ends and a large diameter in the middle to reduce interference from external torque generated by the coupling's fixation on axial loading while transmitting torque. The pin key 209 and the pin key cylindrical coupling 2010 work together to ensure reliable torque transmission and allow the cylindrical connecting block 2011 to move axially under the constraint of the linear bearing 2013, effectively eliminating the influence of a single coupling connection on axial loading.

[0056] The rotating shaft 2016 passes through the left bushing 2014 and the right bushing 2015, and is connected to the motion generation module 3 via the key 209, the key cylindrical coupling 2010, the cylindrical connecting block 2011, the cylindrical-cylindrical coupling 2012, and the linear bearing 2013.

[0057] like Figures 9-10 As shown, the motion generation module 3 includes a motion platform 306, which is the basic support component. A lifting platform 301 is installed below the motion platform 306 and is fixedly connected to the motion platform 306. A third raising block 302 is installed below the lifting platform 301. By cooperating with the lifting platform 301 and the third raising block 302, the overall height of the motion generation module 3 can be adjusted.

[0058] A second motor bracket 309 is mounted on the motion platform 306, and the motion platform 306 is fixedly connected to the second motor bracket 309. A servo motor 308 is mounted on the second motor bracket 309. A speed reducer 307 is mounted on one side of the servo motor 308, and the servo motor 308 is connected to the linkage mechanism 310 via the speed reducer 307. The servo motor 308 drives the linkage mechanism 310 to move after its speed is adjusted by the speed reducer 307.

[0059] The linkage mechanism 310 consists of a short rod 3101, a cross rod 3102, a long rod 3103, and a washer 3104. One end of the short rod 3101 is connected to the output shaft of the speed reducer 307. When the servo motor 308 operates, the power is transmitted to the short rod 3101 after the speed is adjusted by the speed reducer 307. The other end of the short rod 3101 is connected to one end of the cross rod 3102 via a pin, causing the short rod 3101 to rotate relative to the cross rod 3102, thus converting circular motion into oscillating motion. The other end of the cross rod 3102 is connected to one end of the long rod 3103 via a pin. The circular motion of the short rod 3101 is transmitted to the long rod 3103 through the cross rod 3102, causing the long rod 3103 to perform periodic reciprocating oscillating motion.

[0060] Shim 3104 is installed at the connection points of short rod 3101, cross rod 3102, and long rod 3103 to prevent direct wear between these components during relative rotation, thus protecting them and reducing friction. The specific working formula of linkage 310 is as follows:

[0061] ;

[0062] in, The length of the short rod is 3101. The length of the crossbar is 3102. The length of the long rod is 3103. The horizontal distance between the fixed bottom points of the short rod 3101 and the long rod 3103 is constant. The angle of the periodic reciprocating oscillation.

[0063] The other end of the long rod 3103 is connected to the left bearing housing 305. One end of the left bearing housing 305 is connected to the torque meter 304, and the other end of the torque meter 304 is connected to the right bearing housing 303 via the bearing housing coupling 311, for measuring frictional torque. The right bearing housing 303 and the left bearing housing 305 provide support and positioning for the shaft components. When the rotating shaft 2016 generates frictional torque during reciprocating oscillation, this torque is transmitted to the shaft connected to the torque meter 304 through the connecting components, thereby enabling the torque meter 304 to measure the frictional torque.

[0064] In use, the left bushing 2014 and the right bushing 2015 are fixed to the lower clamp 202, and the rotating shaft 2016 is pressed by the upper clamp 201. The cylindrical-cylindrical coupling 2012, the cylindrical connecting block 2011, the pin key 209 and the pin key cylindrical coupling 2010 are connected in sequence, so that the rotating shaft 2016 is rigidly connected to the linkage mechanism 310 of the motion generation module 3. The inner ring of the linear bearing 2013 is interference-fitted with the cylindrical connecting block 2011.

[0065] The horizontal lead screw slide 104 and the vertical paper slide 1012 are manually adjusted, and the automatic ball alignment mechanism 1010 ensures that the angle between the direction of the loading force and the axis of the rotating shaft 2016 is the initial angle; the second stepper motor 105 is started, and the preload is applied through the lead screw 106, and the load zero point is calibrated using the force sensor 109.

[0066] In the control computer 4, the target temperature is set, the heating element 208 is started for heating, and the water cooling box 203 is turned on for circulating cooling. The temperature of the lower clamp 202 is monitored in real time by the temperature control system until the temperature stabilizes. The speed, rotation time of the first stepper motor 101, and the parameters of the horizontal lead screw slide 104 are input into the control software. The system automatically calculates the horizontal displacement and loading angle. The loading rate of the second stepper motor 105 is set until the reading of the force sensor 109 reaches the target resultant force. The system automatically calculates the axial load and radial load.

[0067] The servo motor 308 sets the swing frequency and swing angle, and calculates the geometric parameters of the short rod 3101, the horizontal rod 3102 and the long rod 3103 through the linkage mechanism formula; the lifting platform 301 is started to adjust the height of the motion platform 306 so that the linkage mechanism 310 is aligned with the axis of the rotating shaft 2016 to avoid additional bending moment.

[0068] The test is initiated by the control computer 4. The loading module 1 and the motion generation module 3 are started synchronously. The data of the force sensor 109, torque meter 304 and temperature sensor are monitored in real time. When the preset test time (such as 500 hours) is reached or the bushing wear exceeds the critical value, the system automatically stops loading and motion and saves the full cycle data.

[0069] Therefore, the present invention adopts the above-mentioned high-temperature oscillating friction and wear testing machine for shaft bushing with integrated axial and radial loading. This device achieves synchronous application of axial and radial loads through the coordinated control of dual stepper motors in the loading module; at the same time, the self-designed coupling effectively eliminates the influence of the coupling on torque measurement, thereby improving the accuracy of synchronous application.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A high-temperature oscillating friction and wear testing machine for a rotating shaft bushing with integrated axial and radial loading, characterized in that, Includes a base plate, on which a loading module is mounted. One side of the loading module is connected to a high-temperature clamp module, one side of the high-temperature clamp module is connected to a motion generation module, one side of the motion generation module is connected to an electrical control box, and one side of the electrical control box is connected to a control computer. The loading module includes a first stepper motor, a first motor bracket on one side of the first stepper motor, the first stepper motor being mounted on the first motor bracket, a horizontal lead screw slide on one side of the first motor bracket, the first stepper motor being connected to the horizontal lead screw slide via a coupling, a ball joint being mounted on the horizontal lead screw slide, a second stepper motor being mounted above the ball joint, a lead screw being mounted above the second stepper motor, a lead screw bushing being connected to the upper end of the lead screw, a lead screw flange being mounted on the upper side of the lead screw bushing, and a force sensor being mounted above the lead screw flange. A vertical paper slide is installed above the force sensor, and an automatic ball alignment mechanism is installed above the vertical paper slide. One side of the automatic ball alignment mechanism is connected to a rotating shaft. The calculation formulas for the axial and radial loads applied to the rotating shaft are as follows: ； in, Data measured by a force sensor; This is the rotational angular velocity of the first stepper motor; This is the rotation time of the first stepper motor; This is the coefficient corresponding to the horizontal movement distance of the horizontal lead screw slide and the rotation angle of the first stepper motor; The height difference between the rotating shaft and the horizontal lead screw slide; The angle between the applied force and the vertical direction; This refers to the axial load acting on the shaft. This represents the radial load acting on the shaft. The high-temperature clamp module includes an upper clamp, a lower clamp is provided below the upper clamp, a left bushing and a right bushing are provided between the upper clamp and the lower clamp, and the lower clamp is connected to the left bushing and the right bushing respectively. An electric heating tube is installed below the lower clamp, a water-cooled box is installed below the electric heating tube, a water-cooled tube is installed inside the water-cooled box, a heat insulation plate is installed below the water-cooled box, a first shim is installed below the heat insulation plate, and a second shim is installed below the first shim. A cylindrical-cylindrical coupling is provided on one side of the lower clamp, and the rotating shaft is connected to one side of the cylindrical-cylindrical coupling. A cylindrical connecting block is provided on the other side of the cylindrical-cylindrical coupling. The cylindrical connecting block adopts a symmetrical structure with small diameters at both ends and a large diameter in the middle. The cylindrical-cylindrical coupling and the cylindrical connecting block are connected by bolts. The top of the cylindrical connecting block is connected to the key-pin cylindrical coupling via a pin key. The pin key is installed in the keyway of the connection part between the cylindrical connecting block and the key-pin cylindrical coupling. The other end of the cylindrical connecting block is coaxially connected to a linear bearing and uses an interference fit.

2. The high-temperature oscillating friction and wear testing machine for a rotating shaft bushing with integrated radial loading as described in claim 1, characterized in that, The rotating shaft passes through the left bushing and the right bushing, and is connected to the motion generation module via the key, the key-cylindrical coupling, the cylindrical connecting block, the cylindrical-cylindrical coupling, and the linear bearing; The motion generation module includes a motion platform, a lifting platform is provided below the motion platform, the lifting platform is fixedly connected to the motion platform, a third raising block is provided below the lifting platform, a second motor bracket is provided on the motion platform, the motion platform is fixedly connected to the second motor bracket, a servo motor is mounted on the second motor bracket, and a speed reducer is provided on one side of the servo motor. The servo motor is connected to the linkage mechanism via the speed reducer. The linkage mechanism includes a short rod, one end of which is connected to the output shaft of the speed reducer, and the other end of which is connected to one end of a cross rod via a pin. The other end of the cross rod is connected to one end of a long rod via a pin. Shims are installed at the connection points of the short rod, the cross rod, and the long rod. The calculation formula for the function of the linkage mechanism is as follows: ； in, For the length of the short rod, The length of the crossbar. The length of the long rod, The horizontal distance between the fixed bottoms of the short and long poles is constant. The angle of the periodic reciprocating oscillation; The other end of the long rod is connected to the left bearing housing, one end of the left bearing housing is connected to the torque meter, and the other end of the torque meter is connected to the right bearing housing via a bearing housing coupling.

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