A high temperature performance test bench for roller testing and roller testing method

Abstract

The present invention belongs to the technical field of roller detection, and relates to a high-temperature performance test bench for roller detection, comprising a test bench body, a fixed support, a sliding support, a guide rail, a heat-insulating cover, a spring pressure device, and a driving device; the guide rail is arranged on the table of the test bench body, and the fixed support and the sliding support are respectively arranged at both ends of the guide rail; the spring pressure device comprises a pressure bracket, a base, a spring retaining ring 1, a spring retaining ring 2, a pressure spring, a nut 1, and a nut 2; the present invention also relates to a roller detection method, which uses the above-mentioned high-temperature performance test bench for roller detection to perform high-temperature performance detection on the roller. The present invention can realize parameter control such as heating, temperature control, heat preservation, speed change, and loading during the roller detection process, and can implement the detection of stress changes of rollers of various specifications, solving the problem of simulating rollers working in a high-temperature harsh environment. At the same time, during the detection process, the equipment has small shaking, low power consumption, and high reliability.

Description

Technical Field

[0001] The present invention belongs to the technical field of roller detection, and in particular relates to a high-temperature performance test bench for roller detection and a roller detection method. Background Art

[0002] As one of the main transport equipment for conveying loose materials, the weight of the belt conveyor's rollers accounts for 30% to 40% of the total weight of the machine, and the price of the rollers accounts for 25% to 30% of the total price of the machine. In addition, serious failure of the rollers may damage the belt, delaying the work progress and causing huge economic losses. Therefore, in order to ensure the reliability of the newly designed new structure rollers when they are officially put into production and use, their various performance tests will be carried out, including rotation resistance test, water immersion test, radial runout test and roller life test.

[0003] The experimental items of the existing roller test benches currently cover axial load detection, rotational resistance test, water immersion test, dustproof performance test and friction and wear test, etc. However, due to factors such as the working environment or long-term work, rollers may face the situation of working under high temperature conditions. In order to ensure that the rollers can still not affect their normal performance and service life under high temperature conditions, it is necessary to conduct high-temperature tests before they are officially put into production and use. However, the existing technology lacks a test bench that can perform high-temperature performance tests on rollers, and also lacks a roller detection method that can perform high-temperature performance tests on rollers. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and to provide a high-temperature performance test bench and a roller detection method for roller detection.

[0005] Based on one purpose of the present invention, the present invention provides a high temperature performance test bench for roller testing, comprising a test bench body, a fixed support, a sliding support, a guide rail, a heat insulation cover, a spring pressure device and a drive device;

[0006] The guide rail is arranged on the table surface of the test bench body, and the fixed support and the sliding support are respectively arranged at both ends of the guide rail;

[0007] The fixed support includes a bearing seat 1, a three-jaw chuck 1, and a support 1. The bearing seat 1 is fixed above the guide rail through the support 1, and the three-jaw chuck 1 is rotatably connected to the bearing seat 1 through a rotating shaft 1.

[0008] The sliding support includes a second bearing seat, a second three-jaw chuck, and a second support. The second bearing seat is slidably connected to the top of the guide rail through the second support. The second three-jaw chuck is rotatably connected to the second bearing seat through the second rotating shaft. The first three-jaw chuck and the second three-jaw chuck are arranged opposite to each other. A fixing component for limiting the second support is provided on the guide rail.

[0009] The spring pressure device includes a pressure bracket, a base, a spring retaining ring 1, a spring retaining ring 2, a pressure spring, a nut 1 and a nut 2. The base is arranged below the middle section of the guide rail and is arranged perpendicular to the guide rail. The two ends of the base extend to the outside of the guide rail and are symmetrically fixed with screws. Each screw is sequentially sleeved with a nut 1, a spring retaining ring 1, a pressure spring, a spring retaining ring 2 and a nut 2 from bottom to top. A V-shaped groove is provided in the middle of the pressure bracket, which contacts the outer surface of the roller of the roller, and the two ends of the pressure bracket are flat. The two ends of the pressure bracket are respectively clamped between the spring retaining ring 2 and the nut 2 at the corresponding ends, and the two screws are slidably connected to the two ends of the pressure bracket respectively.

[0010] The three-jaw chuck 1, sliding support, guide rail and spring pressure device are respectively covered in the heat-insulating cover, and the heat-insulating cover is sealed with the test bench body. A heating device is provided in the heat-insulating cover, and a transparent cover that can be opened and closed is provided on the top of the heat-insulating cover. The transparent cover is opened and the roller can be taken out or placed in the heat-insulating cover. The two ends of the roller shaft of the roller are detachably connected to the three-jaw chuck 1 and the three-jaw chuck 2 respectively, and the roller shaft of the roller is rotatably connected to the roller through the bearing seat 3. The outer ring of the bearing of the roller in the bearing seat 3 and the contact position of the bearing seat 3 are provided with a stress sheet. The rotating shaft 1 is rotatably and sealably connected to the heat-insulating cover.

[0011] The driving device is in transmission connection with one end of the rotating shaft away from the three-jaw chuck.

[0012] Preferably, the driving device includes a variable frequency motor, a main pulley, a slave pulley and a transmission belt. The variable frequency motor is fixed under the table of the test bench body, and the output shaft of the variable frequency motor is connected to the main pulley. The slave pulley is fixedly sleeved on the end of the rotating shaft away from the three-jaw chuck. The main pulley and the slave pulley are connected through a transmission belt.

[0013] Preferably, the heating device is an electric heating tube, and a temperature sensor is provided in the heat preservation cover. The heating method is electric heating, and the temperature can be adjusted by the power.

[0014] Preferably, both bearing blocks 1 and 2 are equipped with self-aligning outer spherical bearings, and the first and second rotating shafts are rotatably connected to bearing blocks 1 and 2 via the outer spherical bearings at their respective ends. To simulate actual field conditions, the test equipment did not utilize a high-precision coaxial test bench. The use of self-aligning outer spherical bearings at both ends ensures that the roller generates a certain eccentric axial force during rotation, making the roller test more realistic.

[0015] Preferably, the spring pressure device further includes a pressure sensor, with each of the two nuts being provided with a pressure sensor, and the two ends of the pressure bracket being respectively in contact with the corresponding pressure sensors. By providing the pressure sensors, the magnitude of the loading force can be quickly and effectively read, facilitating precise adjustment of the loading force.

[0016] Preferably, the test bench body is rectangular, and four supporting legs are provided at the bottom of the test bench body.

[0017] Preferably, a rotation speed sensor is further provided on the test bench body, and the rotation speed sensor is used to detect the rotation speed of the roller shaft of the roller.

[0018] Preferably, a hollow slot is provided below the guide rail, and two limit slots are provided on the top surface of the guide rail, intersecting the hollow slot. The limit slots extend along the length of the guide rail, and the fixing assembly includes four limit bolts that slide through the corresponding limit slots. The top ends of the four limit bolts pass through the limit holes on the four corners of the support and are then connected to limit nuts. When adjusting the position of the sliding support, a hand or a tool can be inserted into the hollow slot to clamp the limit bolts, making it convenient to rotate the limit nuts to loosen or tighten the limit bolts.

[0019] Based on another object of the present invention, the present invention provides a roller testing method, which uses the above-mentioned high-temperature performance test bench for roller testing to perform high-temperature performance testing on the roller, comprising the following steps:

[0020] Step 1: According to the specifications of the roller to be tested, adjust the jaw positions of the three-jaw chuck 1 and the three-jaw chuck 2 and the height positions of the bearing seat 1 and the bearing seat 2, and adjust the limited position of the sliding support on the guide rail. The height position adjustment of the bearing seat 1 and the bearing seat 2 is achieved by adding shims between the bearing seat 1 and the support 1, and between the bearing seat 2 and the support 2;

[0021] Step 2: Place the roller into the heat-insulating cover and clamp both ends of the roller shaft into the three-jaw chuck 1 and the three-jaw chuck 2;

[0022] Step 3: After the roller is fixed, simulate the actual loading condition of the roller to load the roller; when loading, first tighten the nut 2 to expand the pressure spring and push the pressure bracket to move up until it is in close contact with the outer surface of the roller. Then tighten the nut 1 to make the pressure spring push the pressure bracket to press the roller. The magnitude of the loading force can be effectively obtained through the pressure sensor;

[0023] Step 4: Close the transparent cover, start the heating device according to the set temperature, and start the driving device. The roller shaft of the roller is driven to rotate through the three-jaw chuck. Since the roller of the roller remains stationary under the pressure of the pressure bracket, the roller shaft and the roller generate relative movement;

[0024] Step five: observe the contact stress between the roller bearing and the bearing seat three, analyze the stress change, and summarize the influence of the stress change caused by temperature change on the allowable strength of the bearing seat three when the roller is under load.

[0025] The present invention also includes other components that can be used in the normal operation of the high-temperature performance test bench for roller testing, all of which are conventional means in the field, such as a computer, which can transmit parameters such as speed sensors, temperature sensors, pressure sensors, operating time, and environmental conditions to the computer for subsequent data processing and analysis. In addition, devices or components not limited to the present invention, such as speed sensors, temperature sensors, pressure sensors, variable frequency motors, and thermal insulation covers, all adopt existing technologies in the field.

[0026] The working principle of this invention is to use a spring-loaded pressure system. By calculating the forces acting on the roller during normal operation, the correct pressure spring can be selected. The corresponding load can be applied to the roller, simulating a more realistic working environment. This allows for a certain range of equipment vibration absorption caused by misalignment, minimizing the impact of vibration on the test. Furthermore, the height of the pressure springs at both ends is adjustable, allowing the spring-loaded system to accommodate rollers of varying diameters. The pressure bracket secures the roller, ensuring that the test objective can be achieved by simply rotating the roller shaft. This reduces the amount of shake and weight produced by the roller shaft relative to the roller shaft, reducing both vibration and power consumption. The presence of stress gauges allows for better observation of the contact stress between the roller bearing and the bearing seat. The drive mechanism utilizes a variable frequency drive scheme, adapting to varying speeds to simulate real-world operating conditions. The use of a belt drive effectively reduces the test equipment footprint. The roller is secured with a three-jaw chuck, ensuring a secure and reliable hold for rollers of varying diameters. A transparent cover is provided above the thermal hood for easy observation of the operating status.

[0027] Compared with the prior art, the beneficial effects achieved by the present invention are: the present invention can realize parameter control such as heating, temperature control, heat preservation, speed change, and loading during the roller detection process, and can detect the stress changes of rollers of various specifications, solving the problem of simulating rollers working in high-temperature and harsh environments. At the same time, during the detection process, the equipment shakes less, consumes less power, and has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall external structure of the present invention in Example 1.

[0029] Figure 2 This is a structural schematic diagram from one viewing angle of the present invention in Example 1 after removing the heat-insulating cover and the transparent cover.

[0030] Figure 3 for Figure 2 A partial enlarged schematic diagram of the structure of part A.

[0031] Figure 4 This is a schematic structural diagram from another perspective of the present invention in Example 1 after removing the heat-insulating cover and the transparent cover.

[0032] Figure 5 This is a graph showing the variation trend of the allowable stress with the operating temperature when the bearing seat 3 of the roller in Example 2 is made of ABS material;

[0033] Figure 6 This is a graph showing the variation trend of the temperature influence coefficient of the bearing seat 3 of the roller in Example 2 with the operating temperature when the bearing seat 3 is made of ABS material. DETAILED DESCRIPTION

[0034] The technology of the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0035] Example 1:

[0036] like Figures 1 to 4 As shown, this embodiment provides a high temperature performance test bench for roller testing, including a test bench body 1, a fixed support 2, a sliding support 3, a guide rail 4, a heat insulation cover 5, a spring pressure device 6 and a driving device 7;

[0037] The guide rail 4 is arranged on the table surface of the test bench body 1, and the fixed support 2 and the sliding support 3 are respectively arranged at both ends of the guide rail 4;

[0038] The fixed support 2 includes a bearing seat 21, a three-jaw chuck 22, and a support 23. The bearing seat 21 is fixed above the guide rail 4 through the support 22. The three-jaw chuck 22 is rotatably connected to the bearing seat 21 through a rotating shaft 24.

[0039] The sliding support 3 includes a second bearing seat 31, a second three-jaw chuck 32, and a second support 33. The second bearing seat 31 is slidably connected to the top of the guide rail 4 through the second support 33. The second three-jaw chuck 32 is rotatably connected to the second bearing seat 31 through the second rotating shaft 34. The first three-jaw chuck 22 and the second three-jaw chuck 32 are arranged opposite to each other. A fixing component for limiting the second support 33 is provided on the guide rail 4.

[0040] See also Figure 3The spring pressure device 6 includes a pressure bracket 61, a base 62, a spring retaining ring 1 63, a spring retaining ring 2 64, a pressure spring 65, a nut 1 66 and a nut 2 67. In this embodiment, there are two nuts 1 66, and the lower nut 1 66 serves to prevent loosening. The base 62 is arranged below the middle section of the guide rail 4 and is arranged vertically with the guide rail 4. The two ends of the base 62 extend to the outside of the guide rail 4 and are symmetrically fixed with screws 68. Each screw 68 is sequentially sleeved with a nut 1 66, a spring retaining ring 1 63, a pressure spring 64 and a pressure spring 65 from bottom to top. Spring 65, spring retaining ring 2 64 and nut 2 67, a V-shaped groove is provided in the middle of the pressure bracket 61 which conflicts with the outer surface of the roller 8, and the two ends of the pressure bracket 61 are flat, and the two ends of the pressure bracket 61 are respectively clamped between the spring retaining ring 2 64 and the nut 2 67 at the corresponding ends, and two screws 68 are respectively slidably connected to the two ends of the pressure bracket 61; in this embodiment, the sides of the two ends of the pressure bracket 61 are provided with open grooves matching the screws 68, which is convenient for quickly replacing the corresponding pressure bracket 61 according to the specifications of the roller 8.

[0041] The three-jaw chuck 1 22, sliding support 3, guide rail 4 and spring pressure device 6 are respectively covered in the heat preservation cover 5, and the heat preservation cover 5 is sealed with the test bench body 1. A heating device is provided in the heat preservation cover 5. In this embodiment, the heating device is an electric heating tube (not shown in the figure), and is equipped with a temperature sensor (not shown in the figure). By adopting the electric heating method, the temperature can be quickly adjusted by the power size. A transparent cover 9 is provided on the top of the heat preservation cover 5. In this embodiment, the transparent cover 9 is slidably inserted in the slide groove on the top of the heat preservation cover. When the transparent cover 9 is opened, the roller 8 can be taken out or placed in the heat preservation cover 5. The two ends of the roller shaft of the roller 8 are detachably connected to the three-jaw chuck 1 22 and the three-jaw chuck 2 32 respectively, and the roller shaft of the roller 8 is rotatably connected to the roller through the bearing seat 3. The outer ring of the bearing of the roller in the bearing seat 3 is provided with a stress plate (not shown in the figure) at the contact position with the bearing seat 3. The rotating shaft 1 24 is rotatably and sealably connected to the heat preservation cover 5.

[0042] The driving device 7 is in transmission connection with one end of the rotating shaft 24 away from the three-jaw chuck 22 .

[0043] Specifically, see Figure 1 、 Figure 2 or Figure 4The drive device 7 includes a variable frequency motor 71, a primary pulley 72, a secondary pulley 73, and a transmission belt 74. The variable frequency motor 71 is fixed below the test bench body 1, and the output shaft of the variable frequency motor 71 is in driving connection with the primary pulley 72. The secondary pulley 73 is fixedly sleeved on the end of the rotating shaft 24 away from the three-jaw chuck 22. The primary and secondary pulleys 72 and 73 are connected by a transmission belt 74. The variable frequency speed regulation scheme can adapt to different speeds and simulate real working conditions. The use of a belt drive can effectively reduce the space occupied by the test equipment.

[0044] Furthermore, both bearing block 1 21 and bearing block 2 31 are equipped with self-aligning outer spherical bearings. Rotating shaft 1 24 and rotating shaft 2 34 are rotatably connected to bearing block 1 21 and bearing block 2 31, respectively, via the outer spherical bearings at their corresponding ends. To simulate actual field conditions, the test equipment did not utilize a high-precision coaxial test bench. The use of self-aligning outer spherical bearings at both ends ensures that the idler 8 generates a certain eccentric axial force during rotation, making the test of the idler 8 more realistic.

[0045] Furthermore, the spring pressure device 6 also includes a pressure sensor (not shown). Each of the two second nuts 67 is provided with a pressure sensor, and the two ends of the pressure bracket 61 respectively abut against the corresponding end pressure sensor. By providing the pressure sensor, the magnitude of the loading force can be quickly and effectively read, facilitating precise adjustment of the loading force.

[0046] See also Figure 2 In this embodiment, the test bench body 1 is arranged in a rectangular shape, and four supporting legs are provided at the bottom of the test bench body 1. A speed sensor (not shown in the figure) is also provided on the test bench body, and the speed sensor is used to detect the speed of the roller shaft of the roller 8. An empty slot is provided below the guide rail 4, and two limiting slides 41 that are connected to the empty slot are provided on the top surface of the guide rail 4. The limiting slides 41 are opened along the length direction of the guide rail 4. The fixing assembly includes four limiting bolts 10 that are slidably passed through the corresponding limiting slides 41. The top ends of the four limiting bolts 10 pass through the limiting holes on the four corners of the support 2 33 and are connected to the limiting nuts 11. When adjusting the position of the sliding support 3, you can put your hands or tools into the empty slot to clamp the limiting bolts 10, so that you can conveniently rotate the limiting nuts 11 to loosen or tighten the limiting bolts 10.

[0047] See also Figure 2 and Figure 4 In this embodiment, reinforcement plates 12 are added to both sides of the guide rail 4, and the reinforcement plates 12 are precisely processed to improve the rigidity of the guide rail 4 while ensuring the sliding accuracy of the support 2 33 on the guide rail 4.

[0048] Example 2

[0049] This embodiment proposes a roller testing method, which uses the high-temperature performance test bench for roller testing in Example 1 to perform a high-temperature performance test on the roller 8, including the following steps:

[0050] Step 1: According to the specifications of the roller 8 to be tested, adjust the jaw positions of the three-jaw chuck 1 22 and the three-jaw chuck 2 32 and the height positions of the bearing seat 1 21 and the bearing seat 2 31, and adjust the limited position of the sliding support 3 on the guide rail 4. The height position adjustment of the bearing seat 1 21 and the bearing seat 2 31 is achieved by adding shims between the bearing seat 1 and the support 1, and between the bearing seat 2 and the support 2 33;

[0051] Step 2: Place the roller 8 into the heat-insulating cover 5, and clamp both ends of the roller shaft of the roller 8 into the three-jaw chuck 1 22 and the three-jaw chuck 2 32;

[0052] Step 3: After the roller 8 is fixed, load the roller 8 by simulating the actual load condition of the roller 8; when loading, first tighten the nut 2 67 to expand the pressure spring 65 and push the pressure bracket 61 upward to be in close contact with the outer surface of the roller 8, and then tighten the nut 1 66 to make the pressure spring 65 push the pressure bracket 61 to apply pressure to the roller 8. The magnitude of the loading force can be effectively obtained through the pressure sensor;

[0053] Step 4: Close the transparent cover 9, start the heating device according to the set temperature, and start the driving device 7, so that the roller shaft of the roller 8 is driven to rotate through the three-jaw chuck 1 22. Since the roller of the roller 8 remains stationary under the pressure of the pressure bracket 61, the roller shaft of the roller 8 and the roller generate relative motion;

[0054] Step 5: Observe the contact stress between the bearing of the roller 8 and the bearing seat 3, analyze the stress change, and summarize the influence of the stress change caused by temperature change on the allowable strength of the bearing seat 3 when the roller 8 is under load. The allowable strength of the bearing seat 3 can be calculated by the following formula:

[0055]

[0056] Where [σ] is the allowable stress of bearing seat 3; k is the yield strength of the material; S is the strength safety factor, S T is the temperature influence coefficient.

[0057] S in the above formula T It can be calculated by the following formula:

[0058]

[0059] Where, is the working temperature of the roller under different working conditions. For ABS material, the working temperature under working conditions cannot be greater than 85℃, and 85℃ is the thermal deformation temperature of ABS material.

[0060] Take the bearing seat 3 made of ABS material as an example, Figure 5 The variation trend of its allowable stress with working temperature is shown; Figure 6 The graph shows the change trend of its temperature influence coefficient with the operating temperature.

[0061] The working principle of the present invention is to use a spring-loaded method. By calculating the force exerted on the idler 8 during normal operation, the pressure spring 65 can be correctly selected. The corresponding load can be applied to the idler 8 to simulate a more realistic working environment. This can absorb equipment vibration caused by coaxial deviation within a certain range, reducing the impact of vibration on the test. In addition, the height of the pressure spring 65 is adjustable at both ends, allowing the spring pressure device 6 to adapt to idlers 8 of different diameters. The pressure bracket 61 secures the roller 8 to the roller, achieving the experimental purpose by simply rotating the roller shaft. This reduces the wobble generated by the roller shaft when rotating relative to the roller shaft, resulting in a lighter weight, which reduces equipment wobble and power consumption. The stress gauge allows for better observation of the contact stress between the idler 8 bearing and the bearing seat 3. The drive device 7 uses a variable frequency speed regulation scheme, which can adapt to different speeds and simulate real working conditions. The transmission method uses a belt drive, which effectively reduces the space occupied by the test equipment. The idler 8 is fixed with a three-jaw chuck, which can securely fix the idler 8 with different shaft diameters. A transparent cover 9 is provided above the heat-insulating cover 5 to facilitate personnel to observe the operation status.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high temperature performance test bench for roller testing, comprising a test bench body, characterized in that: It also includes a fixed support, a sliding support, a guide rail, a heat-insulating cover, a spring pressure device and a driving device; The guide rail is arranged on the table surface of the test bench body, the fixed support and the sliding support are respectively arranged at both ends of the guide rail, and a speed sensor is provided on the test bench body, and the speed sensor is used to detect the speed of the roller shaft of the roller; The fixed support includes a bearing seat 1, a three-jaw chuck 1, and a support 1. The bearing seat 1 is fixed above the guide rail through the support 1, and the three-jaw chuck 1 is rotatably connected to the bearing seat 1 through a rotating shaft 1. The sliding support includes a second bearing seat, a second three-jaw chuck, and a second support. The second bearing seat is slidably connected to the top of the guide rail through the second support. The second three-jaw chuck is rotatably connected to the second bearing seat through the second rotating shaft. The first three-jaw chuck and the second three-jaw chuck are arranged opposite to each other. A fixing component for limiting the second support is provided on the guide rail. The spring pressure device includes a pressure bracket, a base, a spring retaining ring 1, a spring retaining ring 2, a pressure spring, a nut 1 and a nut 2. The base is arranged below the middle section of the guide rail and is arranged perpendicular to the guide rail. The two ends of the base extend to the outside of the guide rail and are symmetrically fixed with screws. Each screw is sequentially sleeved with a nut 1, a spring retaining ring 1, a pressure spring, a spring retaining ring 2 and a nut 2 from bottom to top. A V-shaped groove is provided in the middle of the pressure bracket, which contacts the outer surface of the roller of the roller, and the two ends of the pressure bracket are flat. The two ends of the pressure bracket are respectively clamped between the spring retaining ring 2 and the nut 2 at the corresponding ends, and the two screws are slidably connected to the two ends of the pressure bracket respectively. The three-jaw chuck 1, sliding support, guide rail and spring pressure device are respectively covered in the heat-insulating cover, and the heat-insulating cover is sealed with the test bench body. A heating device is provided in the heat-insulating cover, and the heating device is an electric heating tube. A transparent cover that can be opened and closed is provided on the top of the heat-insulating cover. The roller can be taken out or placed in the heat-insulating cover by opening the transparent cover. The two ends of the roller shaft of the roller are detachably connected to the three-jaw chuck 1 and the three-jaw chuck 2 respectively, and the roller shaft of the roller is rotatably connected to the roller through the bearing seat 3. The outer ring of the bearing of the roller in the bearing seat 3 is provided with a stress sheet at the contact position with the bearing seat 3. The rotating shaft 1 is rotatably and sealably connected to the heat-insulating cover. The driving device is in transmission connection with one end of the rotating shaft away from the three-jaw chuck.

2. A high temperature performance test bench for roller testing according to claim 1, characterized in that: The driving device includes a variable frequency motor, a main pulley, a slave pulley and a transmission belt. The variable frequency motor is fixed under the table of the test bench body, and the output shaft of the variable frequency motor is connected to the main pulley. The slave pulley is fixedly sleeved on the end of the rotating shaft away from the three-jaw chuck. The main pulley and the slave pulley are connected by a transmission belt.

3. A high temperature performance test bench for roller testing according to claim 2, characterized in that: A temperature sensor is arranged in the heat-insulating cover.

4. A high temperature performance test bench for roller testing according to claim 3, characterized in that: The bearing seat 1 and the bearing seat 2 are both provided with outer spherical bearings with a self-aligning function, and the rotating shaft 1 and the rotating shaft 2 are rotatably connected to the bearing seat 1 and the bearing seat 2 respectively through the outer spherical bearings at the corresponding ends.

5. The high temperature performance test bench for roller testing according to claim 4, characterized in that: The spring pressure device also includes a pressure sensor. A pressure sensor is provided below each of the two nuts 2, and the two ends of the pressure bracket respectively abut against the bottom of the corresponding end pressure sensor.

6. The high temperature performance test bench for roller testing according to claim 5, characterized in that: The test bench body is rectangular, and four supporting legs are provided at the bottom of the test bench body.

7. The high temperature performance test bench for roller testing according to claim 6, characterized in that: An empty slot is provided at the bottom of the guide rail, and two limiting slots communicating with the empty slot are provided on the top surface of the guide rail. The limiting slots are opened along the length direction of the guide rail. The fixing assembly includes four limiting bolts that slide through the corresponding limiting slots. The top ends of the four limiting bolts pass through the limiting holes on the four corners of the support and are connected to the limiting nuts.

8. A roller detection method, characterized in that: The high temperature performance test bench for roller testing as claimed in claim 7 is used to perform high temperature performance testing on the roller.

9. The roller detection method according to claim 8, characterized in that: The steps include: Step 1: According to the specifications of the roller to be tested, adjust the jaw positions of the three-jaw chuck 1 and the three-jaw chuck 2 and the height positions of the bearing seat 1 and the bearing seat 2, and adjust the limited position of the sliding support on the guide rail. The height position adjustment of the bearing seat 1 and the bearing seat 2 is achieved by adding shims between the bearing seat 1 and the support 1, and between the bearing seat 2 and the support 2; Step 2: Place the roller into the heat-insulating cover and clamp both ends of the roller shaft into the three-jaw chuck 1 and the three-jaw chuck 2; Step 3: After the roller is fixed, simulate the actual loading condition of the roller to load the roller; when loading, first tighten the nut 2 to expand the pressure spring and push the pressure bracket to move up until it is in close contact with the outer surface of the roller. Then tighten the nut 1 to make the pressure spring push the pressure bracket to press the roller. The magnitude of the loading force can be effectively obtained through the pressure sensor; Step 4: Close the transparent cover, start the heating device according to the set temperature, and start the driving device. The roller shaft of the roller is driven to rotate through the three-jaw chuck. Since the roller of the roller remains stationary under the pressure of the pressure bracket, the roller shaft and the roller generate relative movement; Step five: observe the contact stress between the roller bearing and the bearing seat three, analyze the stress change, and summarize the influence of the stress change caused by temperature change on the allowable strength of the bearing seat three when the roller is under load.

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