A high temperature friction and wear testing machine

Abstract

A high temperature friction and wear testing machine, the upper surface of the frame is provided with a friction mechanism mounting rack and a drive mounting rack, the middle of the friction mechanism mounting rack is provided with a rotating shaft, one side is connected with a friction mechanism through a first linear transmission mechanism, the rotating shaft above the friction mechanism mounting rack is provided with a heating turntable, the drive mounting rack is provided with a first transmission shaft and a second transmission shaft, the upper end of the first transmission shaft is connected with the lower end of the rotating shaft through a belt transmission mechanism, the first transmission shaft is connected with the second transmission shaft through a gear pair, the second transmission shaft is connected with the friction mechanism through a second linear transmission mechanism, the bottom of the frame is provided with a power mechanism connected with the lower end of the first transmission shaft and a controller, the heating turntable is provided with an electric heating wire, the rotating shaft is provided with a through-hole type conductive slip ring, the wire of the electric heating wire is connected with a temperature control box through the through-hole type conductive slip ring, the friction mechanism is provided with a temperature sensor connected with the temperature control box, the temperature control box displays the temperature value of the sample in real time and controls the heating power of the electric heating wire.

Description

Technical Field

[0001] This utility model belongs to the technical field of friction and wear testing equipment, specifically relating to a high-temperature friction and wear testing machine. Background Technology

[0002] In high-end equipment manufacturing fields such as aerospace, energy and power, metallurgy and chemical engineering, key friction pairs, such as aero-engine bearings, high-temperature turbine blades, and automotive braking systems, often need to operate for extended periods under extreme conditions including high temperature, high speed, and heavy load. Their tribological properties directly affect the power efficiency, service life, and operational reliability of the equipment. Therefore, accurately simulating and testing the tribological behavior of materials under high-temperature environments is of great significance for optimizing material formulations, improving structural design, and ensuring the safe operation of equipment.

[0003] Currently, most commonly used friction and wear testing machines both domestically and internationally operate at room temperature. For example, Chinese patent application number 2023117424772, entitled "A Friction and Wear Testing Machine," is a room-temperature friction and wear testing machine designed by the applicant. This machine can only be used to test the wear resistance and wear mechanism of amorphous materials under room-temperature conditions. Given the increasingly stringent requirements for evaluating the high-temperature friction and wear performance of materials in the market, there is an urgent need for equipment for high-temperature friction and wear testing. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a high-temperature friction and wear testing machine with precise temperature control and long-term stable operation.

[0005] The technical solution adopted to solve the above-mentioned technical problems is as follows: a high-temperature friction and wear testing machine, wherein a friction mechanism mounting frame and a drive mounting frame are provided on the upper surface of the frame; a rotating shaft is provided in the middle of the friction mechanism mounting frame, and a friction mechanism is connected to one side through a first linear transmission mechanism; a first drive shaft and a second drive shaft are provided on the drive mounting frame; the upper end of the first drive shaft is connected to the lower end of the rotating shaft through a belt transmission mechanism; a small gear is provided in the middle of the first drive shaft; a large gear meshing with the small gear is provided at the lower end of the second drive shaft; the upper end of the second drive shaft is connected to the friction mechanism through a second linear transmission mechanism; and a drive shaft is provided at the bottom of the frame. The lower end is connected to a power mechanism and a controller. The controller controls the forward and reverse rotation of the power mechanism at regular intervals. A heating turntable is installed on the rotating shaft above the friction mechanism mounting frame, and an electric heating wire is installed inside the heating turntable. A through-hole conductive slip ring is installed on the rotating shaft below the friction mechanism mounting frame. The electric heating wire is connected to the corresponding terminal of the through-hole conductive slip ring through a wire. The through-hole conductive slip ring is connected to the temperature control box through a wire. A temperature sensor is installed on the friction mechanism to collect the temperature of the sample. The collected temperature signal of the sample is converted into an electrical signal and input to the temperature control box. The temperature control box displays the sample temperature value in real time and controls the heating power of the electric heating wire.

[0006] As a preferred technical solution, the lower surface of the heating turntable is provided with a heat insulation plate mounting groove and an annular groove in the middle. The annular groove is located outside the heat insulation plate mounting groove. An electric heating wire is provided in the annular groove. A heat insulation plate is provided in the heat insulation plate mounting groove. The outer diameter of the heat insulation plate is the same as the outer diameter of the heating turntable. The heat insulation plate seals the annular groove. A shaft mounting groove is provided in the middle of the heat insulation plate.

[0007] As a preferred technical solution, the heat insulation board is a mica board.

[0008] As a preferred technical solution, the friction mechanism has a translation rod hinged to the mounting base, a weight loading rod is provided on the upper surface of the end of the translation rod away from the mounting base, and a sample clamp with an opening facing downward is provided at the bottom, with a weight mounted on the weight loading rod.

[0009] As a preferred technical solution, the first linear transmission mechanism includes a track and a slider, a spring return device, and a limit block that match the track. The track is fixedly installed on one side of the friction mechanism mounting frame. A spring return device is provided at one end of the track and a limit block is provided at the other end. The slider is located inside the track and is fixedly connected to the friction mechanism.

[0010] As a preferred technical solution, the belt drive mechanism includes a large synchronous pulley, a small synchronous pulley, and a conveyor belt. The large synchronous pulley is located at the upper end of the first drive shaft, and the small synchronous pulley is located at the lower end of the shaft. The large synchronous pulley has 36 teeth, the small synchronous pulley has 20 teeth, and the transmission ratio between the large and small synchronous pulleys is 1:1.8.

[0011] As a preferred technical solution, the second linear transmission mechanism includes a rack and a transmission gear meshing with the rack. The transmission gear is located at the upper end of the second transmission shaft, and the rack is located on the friction mechanism.

[0012] As a preferred technical solution, the power mechanism includes a motor, a reducer, and a coupling. The power output end of the motor is connected to the power input end of the reducer, and the power output end of the reducer is connected to the lower end of the first transmission shaft through the coupling.

[0013] As a preferred technical solution, the frame is a rectangular mounting plate with four adjustable legs at the four corners of the bottom. A connecting beam is provided in the middle between two adjacent adjustable legs, and a reinforcing plate is provided between the adjustable legs, the connecting beam, and the mounting plate.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention employs an annular electric heating wire and a temperature sensor integrated inside the heating turntable, along with a radial sealing structure of a heat-insulating mica plate, to achieve uniform heating of the sample surface and core. Through precise control of the temperature control chamber, it can simulate a high-temperature friction environment with a heating temperature up to 350℃ and maintain a stable temperature, greatly improving the accuracy of the test.

[0016] This invention connects the heating wire and the temperature sensor wire to a through-hole conductive slip ring, which avoids the high-temperature wire from getting tangled and ensures stable transmission of the temperature measurement signal.

[0017] This invention uses a controller to control the power mechanism to repeatedly rotate forward and reverse. The power mechanism drives the first transmission shaft to rotate forward or reverse, and the first transmission shaft drives the turntable to rotate forward or reverse through a belt transmission mechanism. Simultaneously, the second transmission shaft is driven to rotate forward or reverse through the meshing of a small gear and a large gear. Then, the second transmission shaft drives the friction mechanism to reciprocate linearly through a second linear transmission mechanism, thereby achieving large-stroke friction and wear, maintaining a stable friction rate, and improving the accuracy of the test.

[0018] This invention features a compact and convenient structure, which is of great help in the engineering research of stable wear. Furthermore, due to the simple structure of the testing machine, the cost is low, making it suitable for industrial production. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the axial structure of the high-temperature friction and wear testing machine of this utility model.

[0020] Figure 2 This is a schematic diagram of another axial structure of the high-temperature friction and wear testing machine of this utility model.

[0021] Figure 3 This is the front view of the high-temperature friction and wear testing machine of this utility model.

[0022] Figure 4 yes Figure 3 The right view.

[0023] Figure 5 yes Figure 3 Top view.

[0024] Figure 6 This is a schematic diagram showing the connection between the heating plate 11 and the perforated conductive slip ring 20.

[0025] Figure 7 This is a schematic diagram of the installation of temperature sensor 32.

[0026] The components include: frame 1, drive mounting frame 2, rack 3, transmission gear 4, mounting base 5, slider 6, track 7, translation rod 8, weight 9, sample clamp 10, heating turntable 11, heat insulation plate 12, friction mechanism mounting frame 13, belt drive mechanism 14, controller 15, temperature control box 16, power mechanism 17, spring return device 18, limit block 19, perforated conductive slip ring 20, rotating shaft 21, second transmission shaft 22, large gear 23, small gear 24, weight loading rod 25, first transmission shaft 26, mounting plate 27, reinforcing plate 28, adjustable support leg 29, connecting beam 30, scale 31, temperature sensor 32, sample 33, and electric heating wire 34. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but the present invention is not limited to the following embodiments.

[0028] exist Figures 1-7 In this embodiment of the high-temperature friction and wear testing machine, a friction mechanism mounting frame 13 and a drive mounting frame 2 are fixedly mounted on the upper surface of the frame 1. A rotating shaft 21 is mounted on the middle of the friction mechanism mounting frame 13, and a friction mechanism is connected to one side through a first linear transmission mechanism. A first transmission shaft 26 and a second transmission shaft 22 are mounted on the drive mounting frame 2. The upper end of the first transmission shaft 26 is connected to the lower end of the rotating shaft 21 through a belt transmission mechanism 14. A small gear 24 is provided on the middle of the first transmission shaft 26. A large gear 23 that meshes with the small gear 24 is provided on the lower end of the second transmission shaft 22. The upper end of the second transmission shaft 23 is connected to the friction mechanism through a second linear transmission mechanism. A power mechanism 17 and a controller 15 connected to the lower end of the first transmission shaft 26 are provided at the bottom of the frame 1. The controller 15 controls the power mechanism 17 at regular intervals. The friction mechanism is equipped with a rotating shaft 21 fixedly mounted above the mounting bracket 13. The rotating shaft 21 is located below the sample clamp 10 of the friction mechanism. An electric heating wire 34 is installed inside the rotating shaft 21. A through-hole conductive slip ring 20 is installed on the rotating shaft 21 below the mounting bracket 13. The electric heating wire 34 is connected to the corresponding terminal of the through-hole conductive slip ring 20 through a wire. The through-hole conductive slip ring 20 is connected to the temperature control box 16 through a wire. The through-hole conductive slip ring 20 is used to prevent the wire from getting tangled as the rotating shaft 11 rotates. A temperature sensor 32 is installed on the friction mechanism to collect the temperature of the sample. The temperature sensor 32 converts the collected temperature signal of the sample into an electrical signal and inputs it to the temperature control box 16. The temperature control box 16 displays the sample temperature value in real time and controls the power of the electric heating wire.

[0029] The temperature control box 16 in this embodiment is a product sold by Yuanhuang Electric Technology Co., Ltd., and the through-hole conductive slip ring 20 is a product sold by Shenzhen Senruipu Electromechanical Co., Ltd.

[0030] In this embodiment, a heat insulation plate mounting groove and an annular groove are machined in the middle of the lower surface of the heating turntable 11. The annular groove is located outside the heat insulation plate mounting groove. The electric heating wire 34 is installed in the annular groove. The electric heating wire 34 is used to provide stable heat to the heating turntable 11. A heat insulation plate 12 is provided in the heat insulation plate mounting groove. The heat insulation plate is a mica plate. The outer diameter of the heat insulation plate is the same as the outer diameter of the heating turntable 11. The heat insulation plate seals the annular groove. A shaft mounting groove is machined in the middle of the heat insulation plate for installing the shaft 21. The heat insulation plate is used to stabilize the temperature of the upper surface of the heating turntable 11 and reduce heat loss, thereby extending the service life of the equipment.

[0031] In this embodiment, the friction mechanism consists of a translation rod 8 connected to the mounting base 5. A weight loading rod 25 is vertically mounted on the upper surface of the end of the translation rod 8 away from the mounting base 5, and a sample clamp 10 with its opening facing downward is mounted at the bottom to hold the sample 33. A temperature sensor is fixedly mounted on the sample clamp 10, and a weight 9 is mounted on the weight loading rod 25.

[0032] The first linear transmission mechanism of this embodiment includes a track 7, a slider 6 that matches the track 7, a spring return device 18, and a limiting block 19. The track 7 is fixedly installed on one side of the friction mechanism mounting bracket 13. A spring return device 18 is installed at one end of the track 7 and a limiting block 19 is installed at the other end. The slider 6 is located inside the track 7 and is fixedly connected to the mounting seat 5 of the friction mechanism.

[0033] In this embodiment, a scale 31 is machined on the edge of the track 7 to accurately read the distance the translation rod moves along the radius of the turntable. The spring return device 18 is used to limit the position of the translation rod 8, prevent the rack 3 from disengaging from the transmission gear 4, and ensure the stability of the test.

[0034] The spring rebounder 18 in this embodiment includes a mounting block, a spring, a push rod, and a nut. The mounting block has a through hole, the push rod has a spring installed and passes through the through hole in the mounting block, and a nut is installed at the end of the push rod. During the reversing process, the slider squeezes the push rod, which will cause the spring to compress and generate a rebound force, causing the slider to move in the opposite direction, ensuring that the rack 3 and the transmission gear 4 re-mesh with the transmission gear 4.

[0035] The belt drive mechanism 14 in this embodiment includes a large synchronous pulley, a small synchronous pulley, and a conveyor belt. The large synchronous pulley has 36 teeth, the small synchronous pulley has 20 teeth, and the transmission ratio between the large and small synchronous pulleys is 1:1.8. The large synchronous pulley is mounted on the upper end of the first drive shaft 26, and the small synchronous pulley is mounted on the lower end of the rotating shaft 21. The rotation of the first drive shaft 26 drives the large synchronous pulley to rotate, and the large synchronous pulley drives the small synchronous pulley to rotate through the conveyor belt. The small synchronous pulley drives the rotating shaft 21 to rotate.

[0036] The second linear transmission mechanism in this embodiment includes a rack 3 and a transmission gear 4 meshing with the rack 3. The transmission gear 4 has a module m3 of 1, a number of teeth z3 of 16, and a pitch circle diameter of 50.24 mm. The rack 3 has a module m4 of 1, a number of teeth z4 of 37, and a rack length of 116 mm. The transmission gear 4 is fixed to the upper end of the second transmission shaft, and the rack 3 is fixedly mounted on the mounting base 5 of the friction mechanism.

[0037] The power mechanism 17 in this embodiment includes a motor, a reducer, and a coupling. The power output end of the motor is connected to the power input end of the reducer. The power output end of the reducer is connected to the lower end of the first transmission shaft 26 through the coupling. The power mechanism 17 drives the first transmission shaft 26 to rotate forward or backward. The first transmission shaft 26 drives the heating turntable 11 to rotate forward or backward through the belt transmission mechanism 14. The second transmission shaft 22 is driven to rotate forward or backward synchronously through the meshing of the small gear 24 and the large gear 23. Then, the friction mechanism is driven to reciprocate linearly through the second linear transmission mechanism.

[0038] In this embodiment, the frame 1 is a rectangular mounting plate 27 with four adjustable legs 29 at its four corners. A connecting beam 30 is provided between the middle of two adjacent adjustable legs. Reinforcing plates 28 are installed between the adjustable legs 29, the connecting beam 30, and the mounting plate 27 using threaded fasteners. In different testing locations, the height of two adjustable legs on the same side can be adjusted according to requirements, ensuring the adaptability and versatility of the testing machine.

[0039] The working principle of this utility model is as follows:

[0040] In the initial state, the sample clamp 10 fixes the sample 33 at the center of the heating turntable 11, and the slider 6 is located at one end of the track 7 near the limiting block 19. The power system is started by the controller 15, and the motor starts to work, driving the first transmission shaft 26 to rotate through the reducer and coupling. The small gear 24 on the first transmission shaft 26 meshes with the large gear 23 at the lower end of the second transmission shaft 22, driving the second transmission shaft to rotate synchronously.

[0041] Meanwhile, the rotation of the first drive shaft 26 is transmitted to the rotating shaft 21 through the belt drive mechanism 14 via the large synchronous pulley, the small synchronous pulley and the conveyor belt, causing the heating turntable 11 to rotate.

[0042] A transmission gear fixed at the upper end of the second transmission shaft 22 meshes with a rack 3 fixed on the friction mechanism mounting base 5, enabling the friction mechanism to move linearly along the guide rail. As the heating turntable 11 rotates and the friction mechanism moves laterally, the sample 33 moves from the center of the heating turntable 11 to the edge. When the slider 6 of the friction mechanism compresses the spring return mechanism 18 to its limit, the transmission gear 4 briefly disengages from the rack 3. At this time, the controller 15 controls the motor to reverse, using the rebound force generated by the spring return mechanism 18 to make the slider 6 slide towards the limit block 19, re-engaging with the transmission gear 4, thus achieving reverse sliding of the friction mechanism, i.e., the sample 33 moves laterally in the opposite direction. Due to the motor reversal, the entire system operates in the opposite direction until the sample 33 returns to the center position of the heating turntable 11, completing a single high-temperature friction and wear test stroke. During the sample's reciprocating motion, the temperature sensor 32 collects the sample's temperature in real time.

Claims

1. A high-temperature friction and wear testing machine, wherein a friction mechanism mounting frame (13) and a drive mounting frame (2) are provided on the upper surface of the frame (1), a rotating shaft (21) is provided in the middle of the friction mechanism mounting frame (13), and a friction mechanism is connected to one side through a first linear transmission mechanism. A first transmission shaft (26) and a second transmission shaft (22) are provided on the drive mounting frame (2). The upper end of the first transmission shaft (26) is connected to the lower end of the rotating shaft (21) through a belt transmission mechanism (14). A small gear (24) is provided in the middle of the first transmission shaft (26). A large gear (23) meshing with the small gear (24) is provided at the lower end of the second transmission shaft (22). The upper end of the second transmission shaft (22) is connected to the friction mechanism through a second linear transmission mechanism. A power mechanism (17) and a controller (15) connected to the lower end of the first transmission shaft (26) are provided at the bottom of the frame (1). The controller (15) controls the forward and reverse rotation of the power mechanism (17) at regular intervals. A heating turntable (11) is provided on the rotating shaft (21) above the friction mechanism mounting bracket (13), and an electric heating wire (34) is provided inside the heating turntable. A through-hole conductive slip ring is provided on the rotating shaft (21) below the friction mechanism mounting bracket (13). The electric heating wire (34) is connected to the corresponding terminal of the through-hole conductive slip ring (20) through a wire. The through-hole conductive slip ring (20) is connected to the temperature control box (16) through a wire. A temperature sensor (32) is installed on the friction mechanism to collect the temperature of the sample. The collected temperature signal of the sample is converted into an electrical signal and input to the temperature control box (16). The temperature control box (16) displays the sample temperature value in real time and controls the heating power of the electric heating wire (34).

2. The high-temperature friction and wear testing machine according to claim 1, characterized in that... The heating turntable (11) has a heat insulation plate mounting groove and an annular groove in the middle of its lower surface. The annular groove is located outside the heat insulation plate mounting groove. An electric heating wire is installed in the annular groove. A heat insulation plate is installed in the heat insulation plate mounting groove. The outer diameter of the heat insulation plate is the same as the outer diameter of the heating turntable (11). The heat insulation plate seals the annular groove. A rotating shaft mounting groove is installed in the middle of the heat insulation plate.

3. The high-temperature friction and wear testing machine according to claim 2, characterized in that... The insulation board is a mica board.

4. The high-temperature friction and wear testing machine according to claim 1, characterized in that... The friction mechanism is a translation rod (8) hinged on the mounting base (5). A weight loading rod (25) is provided on the upper surface of the end of the translation rod (8) away from the mounting base (5), and a sample clamp (10) with the opening facing downward is provided at the bottom. A weight (9) is mounted on the weight loading rod (25).

5. The high-temperature friction and wear testing machine according to claim 1, characterized in that... The first linear transmission mechanism includes a track (7) and a slider (6), a spring return device (18), and a limiting block (19) that match the track (7). The track (7) is fixedly installed on one side of the friction mechanism mounting bracket (13). A spring return device (18) is provided at one end of the track (7) and a limiting block (19) is provided at the other end. The slider (6) is located inside the track (7) and is fixedly connected to the friction mechanism.

6. The high-temperature friction and wear testing machine according to claim 1, characterized in that... The belt drive mechanism (14) includes a large synchronous pulley, a small synchronous pulley, and a conveyor belt. The large synchronous pulley is located at the upper end of the first transmission shaft (26), and the small synchronous pulley is located at the lower end of the rotating shaft (21). The large synchronous pulley has 36 teeth, the small synchronous pulley has 20 teeth, and the transmission ratio between the large synchronous pulley and the small synchronous pulley is 1:1.

8.

7. The high-temperature friction and wear testing machine according to claim 1, characterized in that: The second linear transmission mechanism includes a rack (3) and a transmission gear (4) meshing with the rack (3). The transmission gear (4) is located at the upper end of the second transmission shaft (22), and the rack (3) is located on the friction mechanism.

8. The high-temperature friction and wear testing machine according to claim 1, characterized in that... The power mechanism (17) includes a motor, a reducer, and a coupling. The power output end of the motor is connected to the power input end of the reducer, and the power output end of the reducer is connected to the lower end of the first transmission shaft (26) through the coupling.

9. A high-temperature friction and wear testing machine according to claim 1, characterized in that... The frame (1) is a rectangular mounting plate (27) with four adjustable legs (29) at the four corners of the bottom. A connecting beam (30) is provided between two adjacent adjustable legs. A reinforcing plate (28) is provided between the adjustable legs, the connecting beam, and the mounting plate.

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