Axial-radial integrated loading high-temperature swing friction-wear testing machine for rotating shaft bushing

Abstract

The invention discloses an axial-radial integrated loading rotating shaft bush high-temperature swing friction-wear testing machine, and belongs to the technical field of friction-wear testing, the axial-radial integrated loading rotating shaft bush high-temperature swing friction-wear testing machine comprises a bottom plate, a loading module is arranged on the bottom plate, one side of the loading module is connected with a high-temperature clamp module, one side of the high-temperature clamp module is connected with a motion generation module, and the motion generation module is connected with the loading module. One side of the motion generation module is connected with an electric control box body, and one side of the electric control box body is connected with a control computer. According to the axial-radial integrated loading rotating shaft bush high-temperature swing friction wear testing machine disclosed by the invention, synchronous application of an axial load and a radial load is realized through cooperative 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 accuracy of synchronous application is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of friction and wear testing, and in particular relates to a high-temperature swing friction and wear testing machine for a rotating shaft bushing with axial and radial integrated loading. Background Art

[0002] As a core component of an aircraft engine, the performance of the high-pressure compressor directly impacts the engine's efficiency and stability. The variable stator vane (VSV) mechanism is a crucial component of the high-pressure compressor. Its function is to adjust the angle of the stator vanes to accommodate airflow variations under varying operating conditions, thereby optimizing the inlet airflow angle, improving compressor stability and efficiency, and preventing surge.

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

[0004] For example, patent application number CN201711446429.3 discloses a temperature-controlled friction and wear testing machine suitable for rotating pairs. The device can realize radial loading and control the test temperature through a heating device, but its loading structure is a planar centring structure, which can only provide radial loading in a single direction and cannot meet the needs of axial / radial composite loading; patent application number CN202310507171.2 discloses a friction and wear testing system for aviation tail nozzle moving pairs. Although it realizes the synthesis of loading in the horizontal and vertical directions, it is essentially still in the category of radial loading and does not involve axial loading problems; in addition, patent application number CN202011271048.8 discloses a friction and wear test bench for the moving pair of a compressor stator blade adjustment mechanism, which can realize reciprocating swinging function and adjust the swinging angle through a connecting rod mechanism, but lacks a loading system and high-temperature environment simulation capabilities, making it difficult to truly restore the working state of the VSV system.

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

[0006] The purpose of the present invention is to provide a high-temperature swing friction and wear testing machine for a rotating shaft bushing with integrated axial and radial loading. The device realizes the synchronous application of axial load and radial load through the coordinated control of dual stepper motors in the loading module; at the same time, the influence of the coupling on torque measurement is effectively eliminated through self-designed coupling, thereby improving the accuracy of synchronous application.

[0007] To achieve the above-mentioned objectives, the present invention provides a high-temperature swing friction and wear testing machine for a rotating shaft bushing with integrated axial and radial loading, comprising a base plate, a loading module being arranged on the base plate, one side of the loading module being connected to a high-temperature fixture module, one side of the high-temperature fixture module being connected to a motion generation module, one side of the motion generation module being connected to an electric control box, and one side of the electric 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 installed on the first motor bracket, a horizontal screw slide is provided on one side of the first motor bracket, the first stepper motor is connected to the horizontal screw slide through a coupling, a ball joint is installed on the horizontal screw slide, a second stepper motor is provided above the ball joint, a screw is provided above the second stepper motor, the upper end of the screw is connected to a screw sleeve, a screw flange is provided on the upper side of the screw sleeve, and a force sensor is provided above the screw flange.

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

[0010]

[0011] Among them, F 测 The data measured by the force sensor; ω 水平 is the speed of the first stepper motor; t is the rotation time of the first stepper motor; α is the coefficient of the horizontal moving distance of the horizontal screw slide and the rotation angle of the first stepper motor; h is the height difference between the rotating shaft and the horizontal screw slide; θ is the angle between the loading force and the vertical direction; F 轴向 F is the axial load on the shaft; 径向 is the radial load on the shaft.

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

[0013] Preferably, an electric heating tube is arranged below the lower clamp, a water cooling box is arranged below the electric heating tube, a water cooling tube is arranged in the water cooling box, an insulation board is arranged below the water cooling box, a first raising block is arranged below the insulation board, and a second raising block is arranged below the first raising block.

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

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

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

[0018]

[0019] Among them, l1 is the length of the short rod, l2 is the length of the crossbar, l3 is the length of the long rod, and l4 is the horizontal constant distance between the short rod and the bottom of the long rod. is the periodic reciprocating oscillation angle.

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

[0021] Therefore, the present invention adopts the above-mentioned shaft-radial integrated loading high-temperature swing friction and wear testing machine for rotating shaft bushings. Compared with the prior art, the present invention has the following significant beneficial effects:

[0022] 1. The present invention can realize the simultaneous application of axial and radial loads, and accurately control the load size and direction through stepping motors, screws, etc.; the automatic ball centering mechanism can adapt to eccentric working conditions, ensuring loading accuracy and adaptability;

[0023] 2. The present invention ensures efficient torque transmission through the rigid connection of cylinder-cylinder coupling, cylindrical connecting block, pin key and pin key cylindrical coupling, and uses linear bearing guide to accurately transmit axial loading force. The small diameter at both ends and large diameter in the middle of the cylindrical connecting block automatically compensates for coaxial deviation and eliminates additional torque.

[0024] 3. The motion generation module of the present invention accurately controls the reciprocating swinging 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 aircraft engine components.

[0025] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0028] Figure 3 This is a schematic structural diagram of an automatic ball centering mechanism of a high-temperature swing friction and wear testing machine for a rotating shaft bushing with integrated axial and radial loading according to the present invention;

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

[0030] Figure 5 This is a schematic diagram of the screw shaft sleeve structure of a high-temperature swing friction and wear testing machine for a shaft-radial integrated loading shaft bushing according to the present invention;

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

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

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

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

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

[0036] Reference numerals

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

[0038] 2. High-temperature fixture module; 201. Upper fixture; 202. Lower fixture; 203. Water-cooling box; 204. Water-cooling pipe; 205. Heat shield; 206. First spacer block; 207. Second spacer block; 208. Electric heating pipe; 209. Pin key; 2010. Pin key cylindrical coupling; 2011. Cylindrical connecting block; 2012. Cylinder-cylinder coupling; 2013. Linear bearing; 2014. Left bushing; 2015. Right bushing; 2016. Rotating shaft;

[0039] 3. Motion generation module; 301. Lifting platform; 302. Third raising 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. Connecting rod mechanism; 3101. Short rod; 3102. Cross bar; 3103. Long rod; 3104. Gasket; 311. Bearing seat coupling; 4. Control computer; 5. Electronic control box; 6. Base plate. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used in the present invention should be the common meanings understood by people with ordinary skills in the field to which the present invention belongs.

[0041] Example 1

[0042] like Figure 1 As shown, the present invention discloses a high-temperature swing 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 of an aircraft engine compressor to conduct friction and wear tests under high temperature and axial radial loading. The machine comprises 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 fixture module 2, which in turn is connected to a motion generation module 3. The motion generation module 3 is connected to an electronic control box 5, which in turn is connected to a control computer 4. The electronic control box 5 integrates the entire test machine circuitry, and the control computer 4 issues commands to control the operation of the various parts of the test machine, thereby achieving control of the entire friction and wear test.

[0043] like Figure 2-Figure 5 The loading module 1 shown includes a first stepper motor 101. A first motor bracket 102 is provided on one side of the first stepper motor 101, and the first stepper motor 101 is mounted on the first motor bracket 102. A horizontal screw slide 104 is provided on one side of the first motor bracket 102. The first stepper motor 101 is connected to the horizontal screw slide 104 via a coupling 103. A ball joint 1011 is mounted on the horizontal screw slide 104.

[0044] A second stepper motor 105 is mounted above the ball joint 1011. A lead screw 106 is mounted above the second stepper motor 105. The upper end of the lead screw 106 is connected to a lead screw sleeve 108. A lead screw flange 107 is mounted above the lead screw sleeve 108. A force sensor 109 is mounted above the lead screw flange 107. During operation, the second stepper motor 105 rotates the lead screw 106. The lead screw sleeve 108 converts the circular motion of the lead screw 106 into axial linear motion. The lead screw sleeve 108 then drives the lead screw flange 107 to perform axial linear motion, thereby applying force. The force sensor 109 accurately measures the resultant load and ensures force control accuracy during the loading process.

[0045] A vertical paper slide 1012 is disposed above the force sensor 109, and an automatic ball-centering mechanism 1010 is disposed above the vertical paper slide 1012. A rotating shaft 2016 is disposed on one side of the automatic ball-centering mechanism 1010, and the automatic ball-centering mechanism 1010 is connected to the rotating shaft 2016. The automatic ball-centering mechanism 1010 has two balls at the top, which are connected to the vertical paper slide 1012 at the bottom via a ball joint 1011. This allows the automatic ball-centering mechanism 1010 to automatically adjust its position when a loading force is applied to the rotating shaft 2016, if there is eccentricity, so that both balls are tangential to the rotating shaft 2016, while not affecting the vertical loading operation.

[0046] The loading module decouples the horizontal displacement (driven by the first stepper motor) from the vertical load (driven by the second stepper motor) through the linkage structure of the ball joint and the screw slide, so that the axial and radial loads can be adjusted independently without interfering with each other. Figure 3 As shown in the figure, the automatic ball centering mechanism can ensure the load direction accuracy under eccentric working conditions through the adaptive contact of double balls with the rotating shaft.

[0047] When the first stepper motor 101 rotates, it drives the horizontal screw slide 104 through the coupling 103 to move, thereby adjusting the vertical angle of the automatic ball centering mechanism 1010. The automatic ball centering mechanism 1010 works in conjunction with the horizontal screw slide 104 and the vertical screw 106 to achieve precise control of the simultaneous axial and radial loads on the rotating shaft 2016 and the magnitude of the load. The precise calculation formulas for the axial and radial loads are as follows:

[0048]

[0049] Among them, F 测 is the data measured by the force sensor 109; ω 水平 Set the speed of the first stepper motor 101; t is the rotation time of the first stepper motor 101; α is the coefficient corresponding to the horizontal movement distance of the horizontal screw slide 104 and the rotation angle of the first stepper motor 101, which can be measured through previous calibration and is a constant coefficient; h is the height difference between the rotating shaft 2016 and the horizontal screw slide 104, which can be measured in advance and is a constant coefficient; θ is the angle between the loading force and the vertical direction; F 轴向 is the axial load on the shaft 2016; F 径向 is the radial load on the shaft 2016.

[0050] like Figure 6-Figure 8 As shown, the high temperature fixture module 2 includes an upper fixture 201, a lower fixture 202 is provided below the upper fixture 201, a left bushing 2014 and a right bushing 2015 are provided between the upper fixture 201 and the lower fixture 202, and the lower fixture 202 is connected to the left bushing 2014 and the right bushing 2015 respectively.

[0051] An electric heating tube 208 is provided below the lower clamp 202 for heating to create a high-temperature environment. A water cooling box 203 is provided below the electric heating tube 208, and a water cooling tube 204 is provided inside the water cooling box 203. The water cooling box 203 realizes circulating cooling through the water cooling tube 204. A heat insulation board 205 is provided below the water cooling box 203, and the heat insulation board 205 is used to assist in temperature control. The temperature control box accurately controls the temperature inside the electric control box 5. A first raising block 206 is provided below the heat insulation board 205, and a second raising block 207 is provided below the first raising block 206. By providing the first raising block 206 and the second raising block 207 of different thicknesses, the height of the heat insulation board 205 can be flexibly adjusted to meet the requirements of the spatial layout and installation position between different components inside the testing machine, so that each component can be accurately matched in three-dimensional space. At the same time, the pad block can assist in heat insulation to a certain extent, reduce heat loss through conduction from the bottom, and provide solid support for the insulation board 205, ensuring that the insulation board 205 will not be displaced or deformed due to external forces (such as vibration, etc.) during the operation of the testing machine, thereby ensuring the stability of the insulation effect and the stability of the entire high-temperature fixture module 2 structure.

[0052] A cylindrical-cylinder coupling 2012 is provided on one side of the lower fixture 202. One side of the cylindrical-cylinder coupling 2012 is connected to a rotating shaft 2016. A cylindrical connecting block 2011 is provided on the other side of the cylindrical-cylinder coupling 2012. The cylindrical-cylinder coupling 2012 and the cylindrical connecting block 2011 are connected by bolts, thereby transmitting torque from the rotating shaft 2016 to the cylindrical connecting block 2011. A pin key 209 is installed in the keyway at the connection between the cylindrical connecting block 2011 and the pin key cylindrical coupling 2010 to prevent relative rotation between the two and ensure accurate torque transmission.

[0053] The other end of cylindrical connecting block 2011 is coaxially connected to linear bearing 2013. Cylindrical connecting block 2011 and the inner ring of linear bearing 2013 employ an interference fit, precisely constraining axial movement of cylindrical connecting block 2011 by linear bearing 2013. This prevents unnecessary deflection during loading and ensures that the axial loading force is accurately applied to rotating shaft 2016.

[0054] The cylinder-cylinder coupling 2012 plays a key role in connecting the rotating shaft 2016 and the cylindrical connecting block 2011, ensuring torque transmission. The symmetrical design of the cylindrical connecting block 2011, with smaller diameters at both ends and a larger diameter in the middle, is designed to transmit torque while minimizing the interference of external torque generated by the coupling's fixation on axial loading. The key 209 and the key-pin cylindrical coupling 2010 work together to ensure reliable torque transmission and enable axial movement of the cylindrical connecting block 2011 within the constraints of the linear bearing 2013, effectively eliminating the impact of a single coupling connection on axial loading.

[0055] The rotating shaft 2016 passes through the left bushing 2014 and the right bushing 2015, and is connected to the motion generation module 3 through the pin key 209, the pin key cylindrical coupling 2010, the cylindrical connecting block 2011, the cylinder-cylinder coupling 2012, and the linear bearing 2013.

[0056] like Figure 9-10 As shown, the motion generation module 3 includes a motion platform 306, which is a basic supporting component. A lifting platform 301 is provided below the motion platform 306. The lifting platform 301 is fixedly connected to the motion platform 306. A third raising block 302 is provided below the lifting platform 301. The lifting platform 301 cooperates with the third raising block 302 to adjust the overall height of the motion generation module 3.

[0057] A second motor bracket 309 is mounted on the motion platform 306 and 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 a connecting rod mechanism 310 via the speed reducer 307. The servo motor 308 drives the connecting rod mechanism 310 after the speed is adjusted by the speed reducer 307.

[0058] The connecting rod mechanism 310 consists of a short rod 3101, a crossbar 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 is running, the power is transferred 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 crossbar 3102 via a pin, allowing the short rod 3101 to rotate relative to the crossbar 3102 to achieve the conversion from circular motion to oscillating motion. The other end of the crossbar 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 via the crossbar 3102, driving the long rod 3103 to perform periodic reciprocating oscillating motion.

[0059] The washer 3104 is installed at the connection between the short rod 3101, the crossbar 3102 and the long rod 3103 to prevent direct wear of these components during relative rotation, thereby protecting and reducing friction. The specific formula for the action of the connecting rod mechanism 310 is as follows:

[0060]

[0061] Among them, l1 is the length of the short rod 3101, l2 is the length of the crossbar 3102, l3 is the length of the long rod 3103, and l4 is the horizontal constant distance between the bottom of the short rod 3101 and the long rod 3103. is the periodic reciprocating oscillation angle.

[0062] The other end of the long rod 3103 is connected to the left bearing seat 305, one end of which is connected to the torque meter 304. The other end of the torque meter 304 is connected to the right bearing seat 303 via the bearing seat coupling 311 for measuring friction torque. The right bearing seat 303 and the left bearing seat 305 provide support and positioning for shaft components. When the rotating shaft 2016 generates friction torque during its reciprocating oscillation, this torque is transmitted through the connecting component to the shaft connected to the torque meter 304, allowing the torque meter 304 to measure the friction torque.

[0063] When in use, the left bushing 2014 and the right bushing 2015 are fixed to the lower clamp 202, the rotating shaft 2016 is pressed by the upper clamp 201, and the cylinder-cylinder 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 connecting rod mechanism 310 of the motion generation module 3, and the inner ring of the linear bearing 2013 is interference fit with the cylindrical connecting block 2011.

[0064] Manually adjust the horizontal screw slide 104 and the vertical paper slide 1012, and ensure that the angle between the loading force direction and the axis of the rotating shaft 2016 is the initial angle through the automatic ball centering mechanism 1010; start the second stepper motor 105, apply preload force through the screw 106, and use the force sensor 109 to calibrate the load zero point.

[0065] The target temperature is set in the control computer 4, and the electric heating tube 208 is activated for heating. Simultaneously, the water cooling box 203 is turned on for circulating cooling. The temperature of the lower fixture 202 is monitored in real time by the temperature control system until the temperature stabilizes. The speed and rotation time of the first stepper motor 101 and the parameters of the horizontal 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 force sensor 109 reading reaches the target resultant force. The system then automatically calculates the axial and radial loads.

[0066] The servo motor 308 sets the swing frequency and swing angle, and calculates the geometric parameters of the short rod 3101, the cross rod 3102 and the long rod 3103 through the linkage formula; the lifting platform 301 is started to adjust the height of the motion platform 306 so that the linkage 310 is aligned with the axis of the rotating shaft 2016 to avoid additional bending moment.

[0067] The test is started by controlling the computer 4, and the loading module 1 and the motion generation module 3 are started synchronously. The force sensor 109, the torque meter 304 and the temperature sensor data 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 movement and saves the full cycle data.

[0068] Therefore, the present invention adopts the above-mentioned axial-radial integrated loading rotating shaft bushing high-temperature swing friction and wear testing machine, which realizes the synchronous application of axial load and radial load through the coordinated control of dual stepping motors in the loading module; at the same time, through the self-designed coupling, the influence of the coupling on torque measurement is effectively eliminated, thereby improving the accuracy of synchronous application.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solutions of the present invention with equivalents, and these modifications or equivalent replacements 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 swing friction and wear testing machine for rotating shaft bushings with integrated radial and axial loading, characterized in that: It includes a base plate, a loading module is arranged on the base plate, one side of the loading module is connected to the high-temperature fixture module, one side of the high-temperature fixture module is connected to the motion generation module, one side of the motion generation module is connected to the electric control box, and one side of the electric control box is connected to the control computer.

2. The high-temperature swing friction and wear testing machine for rotating shaft bushings with integrated axial and radial loading according to claim 1, characterized in that: 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 installed on the first motor bracket, a horizontal screw slide is provided on one side of the first motor bracket, the first stepper motor is connected to the horizontal screw slide through a coupling, a ball joint is installed on the horizontal screw slide, a second stepper motor is provided above the ball joint, a screw is provided above the second stepper motor, the upper end of the screw is connected to a screw sleeve, a screw flange is provided on the upper side of the screw sleeve, and a force sensor is provided above the screw flange.

3. The high-temperature swing friction and wear testing machine for rotating shaft bushings with integrated axial and radial loading according to claim 2, characterized in that: A vertical paper slide is provided above the force sensor. An automatic ball centering mechanism is provided above the vertical paper slide. One side of the automatic ball centering mechanism is connected to the rotating shaft. The calculation formulas for the axial and radial loads applied to the rotating shaft are as follows: Among them, F 测 The data measured by the force sensor; ω 水平 is the speed of the first stepper motor; t is the rotation time of the first stepper motor; α is the coefficient of the horizontal moving distance of the horizontal screw slide and the rotation angle of the first stepper motor; h is the height difference between the rotating shaft and the horizontal screw slide; θ is the angle between the loading force and the vertical direction; F 轴向 is the axial load on the shaft; F 径向 is the radial load on the shaft.

4. The high-temperature swing friction and wear testing machine for rotating shaft bushings with integrated axial and radial loading according to claim 3, characterized in that: The high-temperature fixture module includes an upper fixture, a lower fixture is arranged below the upper fixture, a left bushing and a right bushing are arranged between the upper fixture and the lower fixture, and the lower fixture is connected to the left bushing and the right bushing respectively.

5. The high-temperature swing friction and wear testing machine for rotating shaft bushings with integrated axial and radial loading according to claim 4, characterized in that: An electric heating tube is arranged below the lower clamp, a water cooling box is arranged below the electric heating tube, a water cooling tube is arranged in the water cooling box, an insulation board is arranged below the water cooling box, a first padding block is arranged below the insulation board, and a second padding block is arranged below the first padding block.

6. The high-temperature swing friction and wear testing machine for rotating shaft bushings with integrated axial and radial loading according to claim 5, characterized in that: A cylinder-cylinder coupling is provided on one side of the lower clamp, one side of the cylinder-cylinder coupling is connected to the rotating shaft, and a cylindrical connecting block is provided on the other side of the cylinder-cylinder coupling. The cylinder-cylinder coupling is connected to the cylindrical connecting block by bolts, and the top of the cylindrical connecting block is connected to the pin key cylindrical coupling via a pin key, and the pin key is installed in the keyway of the connecting part between the cylindrical connecting block and the pin key cylindrical coupling, and the other end of the cylindrical connecting block is coaxially connected to the linear bearing.

7. The high-temperature swing friction and wear testing machine for rotating shaft bushings with integrated axial and radial loading according to claim 6, characterized in that: The rotating shaft passes through the left bushing and the right bushing, and is connected to the motion generation module through the pin key, the pin key cylindrical coupling, the cylindrical connecting block, the cylinder-cylinder coupling, and the linear bearing.

8. The high-temperature swing friction and wear testing machine for rotating shaft bushings with integrated axial and radial loading according to claim 7, characterized in that: The motion generation module includes a motion platform, a lifting platform is arranged below the motion platform, the lifting platform is fixedly connected to the motion platform, a third pad is arranged below the lifting platform, a second motor bracket is arranged on the motion platform, the motion platform is fixedly connected to the second motor bracket, a servo motor is installed on the second motor bracket, and a speed reducer is arranged on one side of the servo motor.

9. The high-temperature swing friction and wear testing machine for rotating shaft bushings with integrated axial and radial loading according to claim 8, characterized in that: The servo motor is connected to the connecting rod mechanism via the speed reducer. The connecting rod mechanism includes a short rod, one end of the short rod is connected to the output shaft of the speed reducer, the other end of the short rod is connected to one end of the cross rod through a pin, and the other end of the cross rod is connected to one end of the long rod through a pin. A gasket is installed at the connection between the short rod, the cross rod and the long rod. The calculation formula for the action of the connecting rod mechanism is as follows: Among them, l1 is the length of the short rod, l2 is the length of the crossbar, l3 is the length of the long rod, and l4 is the horizontal constant distance between the short rod and the bottom of the long rod. is the periodic reciprocating oscillation angle.

10. The high-temperature swing friction and wear testing machine for rotating shaft bushings with integrated axial and radial loading according to claim 9, characterized in that: The other end of the long rod is connected to the left bearing seat, one end of the left bearing seat is connected to the torque meter, and the other end of the torque meter is connected to the right bearing seat via a bearing seat coupling.

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