A friction experiment device for a thermal vacuum environment

Abstract

The present invention relates to the technical field of wear resistance experiments, and discloses a friction experiment device in a thermal vacuum environment, including an experimental platform, on which a vacuum test chamber is arranged, and auxiliary support side plates are arranged on both sides of the vacuum test chamber. The device also includes a pressing mechanism and a rotating mechanism; the pressing mechanism includes a support sleeve arranged on one of the auxiliary support side plates, a first pull rod slidably connected to the auxiliary support side plate is arranged inside the support sleeve, and a constant-tension pressing component for driving the first pull rod to move away from the center of the experimental platform is arranged on the auxiliary support side plate. An extension plate is arranged on the outer side of the support sleeve, and the middle part of an L-shaped deflection plate is rotatably connected to one end of the extension plate close to the center of the experimental platform. A friction block is arranged at one end of the L-shaped deflection plate close to the experimental platform. By setting the constant-tension pressing component to continuously pull the first pull rod to move, the friction block always maintains a pressing force and performs friction along the outer wall of the friction ring.

Description

Technical Field

[0001] The present invention relates to the technical field of wear resistance experiments, and specifically to a friction experiment device in a thermal vacuum environment. Background Art

[0002] Friction experiments in a thermal vacuum environment are experiments to study the friction characteristics of objects under specific conditions, exploring the friction coefficient, wear laws and other characteristics of different materials in a thermal vacuum environment. Therefore, it is necessary to provide a vacuum and a specific high-temperature environment for the experiment. The vacuum environment is usually composed of a vacuum pump and vacuum measuring instruments, etc., which can reduce the air pressure in the experimental environment to the required vacuum degree, generally reaching even lower to simulate the high-vacuum state in space. The heating and temperature control system can heat and precisely control the temperature of the experimental sample, enabling the experiment to be carried out under different temperature conditions and simulating the extreme temperature changes in the space environment. The heating method can adopt resistance heating, infrared heating, etc., and the temperature control accuracy is usually required to reach ±1°C or even higher.

[0003] Some existing devices usually apply load by means of bolt fixation. However, during the friction experiment, due to continuous friction, the material itself will be worn, and at this time, the size of the material changes. The bolt fixation method will cause the pressure on the friction surface to change, thereby affecting the frictional force. Therefore, it needs to be improved. Summary of the Invention

[0004] The purpose of the present invention is to provide a friction experiment device in a thermal vacuum environment to solve the technical problem of the change in the pressure on the friction surface existing in the prior art.

[0005] A friction experiment device in a thermal vacuum environment includes an experimental platform, a vacuum test chamber is arranged on the experimental platform, auxiliary support side plates are arranged on both sides of the vacuum test chamber, and further includes a pressure application mechanism and a rotation mechanism; the pressure application mechanism includes a support sleeve arranged on one side auxiliary support side plate, a first pull rod slidably connected with the auxiliary support side plate is arranged inside the support sleeve, a constant-tension pressure application component for driving the first pull rod to move away from the center of the experimental platform is arranged on the auxiliary support side plate, an extension plate is arranged on the outer side of the support sleeve, the middle part of an L-shaped deflection plate is rotatably connected to one end of the extension plate close to the center of the experimental platform, a friction block is arranged at one end of the L-shaped deflection plate close to the experimental platform, a push plate is arranged at the end of the first pull rod, one end of a connecting rod is rotatably connected to the end of the push plate, and the other end of the connecting rod is rotatably connected to one end of the L-shaped deflection plate far from the center of the experimental platform; the rotation mechanism includes a rotating sleeve rotatably connected to the other side auxiliary support side plate, an inner ring clamping head component is arranged on one side of the rotating sleeve close to the center of the experimental platform, and a friction ring cooperating with the friction block is detachably connected to the outside of the inner ring clamping head component.

[0006] As a preferred technical solution of the present invention, the number of the protruding plates is greater than or equal to two, and the protruding plates are evenly distributed relative to the center of the support sleeve. The end of the L-shaped deflection plate close to the center of the experimental platform is rotatably connected to a fixed clamping plate, and the fixed clamping plate is detachably connected to a friction block.

[0007] As a preferred technical solution of the present invention, the constant tension pressure assembly includes a cross bar arranged on the side of the first pull rod away from the center of the experimental platform, the cross bar is connected to one end of the pulling rope, and the other end of the pulling rope is provided with a counterweight head. The end of the experimental platform is provided with a clearance groove matched with the counterweight head, and the internal size of the clearance groove is larger than the size of the counterweight head. Vertical plates are arranged on both sides of the clearance groove, and the ends of the vertical plates are provided with a main shaft, and the main shaft is rotatably connected with a guide wheel matched with the pulling rope. A limited slot plate is arranged at one end of the first pull rod away from the center of the experimental platform, and a deflection top plate is rotatably connected to the middle of the main shaft. An arc-shaped top head matched with the limited slot plate is arranged at the end of the deflection top plate. When the deflection top plate rotates to a state of contact with the arc-shaped top head, the L-shaped deflection plate is in an unfolded state relative to the support sleeve. A stopper rod matched with the pulling rope is arranged at one end of the deflection top plate away from the arc-shaped top head. When the pulling rope is in a tensioned state under the gravity of the counterweight head, the pulling rope is close to the outside of the stopper rod.

[0008] As a preferred technical solution of the present invention, the inner ring clamping head assembly includes a second pull rod slidably connected to the middle of the rotating sleeve, one end of the second pull rod close to the center of the experimental platform is rotatably connected to one end of the first support plate, the other end of the first support plate is rotatably connected to one side of the clamping block, the other side of the clamping block is rotatably connected to one end of the second support plate, and the other end of the second support plate is rotatably connected to the outside of the rotating sleeve. A support frame is provided at the end of the rotating sleeve away from the center of the experimental platform, the middle part of the support frame is threadedly connected to the middle part of the pulling screw rod, and the end of the pulling screw rod is rotatably connected to the end of the second pull rod. The number of the clamping blocks is greater than or equal to two, and the clamping blocks are evenly distributed relative to the center of the rotating sleeve. The clamping blocks are L-shaped structures, and a rubber pad is provided on the side of the clamping block that contacts the inner wall of the friction ring. A threaded sleeve is provided on the side of the rotating sleeve close to the center of the experimental platform, and a slide groove is provided on the outside of the threaded sleeve, and a slider is slidably connected to the slide groove, and the slider is rotatably connected to the end of the second support plate, and two fastening nuts threadedly connected to the threaded sleeve are provided on the side of the slider away from the center of the experimental platform.

[0009] As a preferred technical solution of the present invention, a driving motor is provided on the experimental platform, and the output shaft of the driving motor is fixedly connected to a first transmission pulley, the first transmission pulley is connected to a second transmission pulley through a conveyor belt, and the second transmission pulley is fixedly connected to a side of a rotating sleeve away from the center of the experimental platform.

[0010] By adopting the above technical solution, the present invention has the following beneficial effects:

[0011] By setting the constant-tension pressing component to continuously pull the first pull rod to move, the friction block is always kept under a pressing force to perform friction treatment along the outer wall of the friction ring, so that even if the thickness changes after long-term friction between the friction ring and the friction block, effective friction treatment can still be carried out, thereby simulating the friction effect under actual use conditions and making the final experimental results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] Figure 1 It is a schematic structural diagram of a friction experiment device in a thermal vacuum environment.

[0014] Figure 2 It is a schematic structural diagram of the interior of a vacuum test chamber in a friction experiment device in a thermal vacuum environment.

[0015] Figure 3 It is a schematic structural diagram of the cooperation between a friction block and a friction ring in a friction experiment device in a thermal vacuum environment.

[0016] Figure 4 It is Figure 3 the front view of.

[0017] Figure 5 It is a schematic structural diagram of a pressing mechanism in a friction experiment device in a thermal vacuum environment.

[0018] Figure 6 It is Figure 5 the partial enlarged schematic diagram of A in.

[0019] Figure 7 It is a schematic structural diagram of an L-shaped deflection plate in a friction experiment device in a thermal vacuum environment.

[0020] Figure 8 It is a schematic structural diagram when the deflection top plate abuts against the limit slot plate in a friction experiment device in a thermal vacuum environment.

[0021] Figure 9 It is a schematic structural diagram of a rotating mechanism in a friction experiment device in a thermal vacuum environment.

[0022] Figure 10 It is Figure 9 the front view of.

[0023] Figure 11Schematic structural diagram of a rotating sleeve in a friction experiment device for a thermal vacuum environment.

[0024] Reference numerals.

[0025] In the figure: 1, experimental platform; 2, vacuum test chamber; 3, pressing mechanism; 4, rotating mechanism; 5, auxiliary support side plate; 6, support sleeve; 7, extending plate; 8, L-shaped deflection plate; 9, connecting rod; 10, push plate; 11, first pull rod; 12, constant-tension pressing assembly; 13, relief groove; 14, counterweight; 15, pulling rope; 16, vertical plate; 17, guide wheel; 18, main shaft; 19, cross bar; 20, stop bar; 21, deflection top plate; 22, arc-shaped top head; 23, limit card slot plate; 24, fixed card plate; 25, friction block; 26, rotating sleeve; 27, second pull rod; 28, first support plate; 29, clamping block; 30, second support plate; 31, pulling screw rod; 32, support frame; 33, inner ring clamping head assembly; 34, first belt pulley; 35, driving motor; 36, conveyor belt; 37, second belt pulley; 38, slider; 39, fastening nut; 40, chute; 41, threaded sleeve; 42, friction ring. Detailed implementation manners

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] In one embodiment, please refer to Figures 1 - 11 , a friction experiment device for a thermal vacuum environment, including an experimental platform 1. The experimental platform 1 is in a flat state for installing various experimental devices. Support legs are provided on the lower surface of the experimental platform 1, so that the experimental platform 1 maintains a reasonable height for easy operation by the operator. A vacuum test chamber 2 is provided in the middle of the upper surface of the experimental platform 1. A cover plate that can be opened is provided on the top of the vacuum test chamber 2. The operator can lift the cover plate upward during use to operate various instruments inside the vacuum test chamber 2. Various temperature control and vacuum degree control devices are provided inside the vacuum test chamber 2. And in order to improve the structural strength of the vacuum test chamber 2, auxiliary support side plates 5 are provided on the side walls on the left and right sides of the vacuum test chamber 2. Subsequent accessories are installed through the auxiliary support side plates 5, reducing the structural strength requirements of the side walls of the vacuum test chamber 2. The auxiliary support side plates 5 can provide sufficient support force. It also includes a pressing mechanism 3 and a rotating mechanism 4;

[0028] The pressing mechanism 3 includes a support sleeve 6 disposed above the right side of the left auxiliary support side plate 5. The support sleeve 6 is a tubular structure and is disposed on the right side of the auxiliary support side plate 5 in the left-right direction. Inside the support sleeve 6, a first pull rod 11 is disposed in the left-right direction. The middle part of the first pull rod 11 is slidably connected to the auxiliary support side plate 5. On the left side of the left auxiliary support side plate 5, a constant-tension pressing component 12 is provided. The constant-tension pressing component 12 can continuously pull the first pull rod 11 to move to the left, and the pressure of the constant-tension pressing component 12 on the first pull rod 11 is constant. The right end of the support sleeve 6 is fixedly connected to the left end of an extension plate 7. The right end of the extension plate 7 is inclined in a direction away from the center of the support sleeve 6. The extension plate 7 is a U-shaped structure. The middle part of the right end of the extension plate 7 is rotatably connected to the middle part of an L-shaped deflection plate 8. A friction block 25 is provided at the right end of the L-shaped deflection plate 8. At the right end of the first pull rod 11, a push plate 10 fixedly connected to the first pull rod 11 is provided. The end of the push plate 10 is rotatably connected to the right end of a connecting rod 9. The left end of the connecting rod 9 is rotatably connected to the left end of the L-shaped deflection plate 8. Therefore, when the first pull rod 11 moves to the right, the first pull rod 11 pulls the L-shaped deflection plate 8 to rotate in a direction away from the support sleeve 6 through the connecting rod 9. At this time, the L-shaped deflection plate 8 opens. When the first pull rod 11 moves to the left and is tightened, the first pull rod 11 pulls the L-shaped deflection plate 8 to rotate in a direction close to the support sleeve 6 through the connecting rod 9. At this time, the L-shaped deflection plate 8 closes, and at this time, the friction block 25 performs a pressing process;

[0029] The rotating mechanism 4 includes a rotating sleeve 26 disposed at the upper end of the right auxiliary support side plate 5. The rotating sleeve 26 is rotatably connected to the upper end of the auxiliary support side plate 5 in the left-right direction. An inner ring clamping head assembly 33 is provided at the left end of the rotating sleeve 26. A friction ring 42 is sleeved outside the inner ring clamping head assembly 33, so as to complete the fixing process of the friction ring 42 through the inner ring clamping head assembly 33. The axis lines of the rotating sleeve 26 and the support sleeve 6 are collinear. Therefore, the circles formed by the friction ring 42 and the friction block 25 are collinear. At this time, after the L-shaped deflection plate 8 closes, the friction block 25 will fall outside the friction ring 42, and the inner ring of the friction block 25 is designed as an arc-shaped structure, so that the friction block 25 is attached to the outer wall of the friction ring 42 to achieve a clamping effect.

[0030] In a case of this embodiment, the number of the protruding plates 7 is greater than or equal to two. In this application, three protruding plates 7 are provided and are evenly distributed relative to the center of the support sleeve 6. That is to say, three friction blocks 25 are also provided in this application. A fixed clamping plate 24 is rotatably connected to the right end of the L-shaped deflection plate 8. One end of the fixed clamping plate 24 close to the center of the support sleeve 6 is detachably connected to the friction block 25. The rotatable connection between the fixed clamping plate 24 and the L-shaped deflection plate 8 enables the friction block 25 to adaptively adjust its angle during operation, so that the friction block 25 can stably press on the subsequent friction ring 42. Moreover, through the detachable connection between the fixed clamping plate 24 and the friction block 25, different friction blocks 25 can be replaced for experiments on the experimental device, and the friction block 25 can be disassembled and assembled after one test, and the friction block 25 that has completed the experiment can be subjected to subsequent detection.

[0031] In a case of this embodiment, the constant-tension pressing component 12 includes the middle part of a cross bar 19 disposed on the left side of the first pull rod 11. The cross bar 19 is arranged in the front-back direction. The upper ends of the pulling ropes 15 are connected to the front and rear ends of the cross bar 19. The lower ends of the pulling ropes 15 are connected to the front and rear sides of the upper surface of the counterweight 14. And a relief groove 13 is provided on the left side of the experimental platform 1. The size of the relief groove 13 is larger than the outer shape size of the counterweight 14. Therefore, the counterweight 14 can pass through the relief groove 13 from top to bottom, so that the counterweight 14 has sufficient descending space to facilitate pulling the first pull rod 11. Vertical plates 16 are provided on the front and rear sides of the relief groove 13. The vertical plates 16 are vertically fixed on the upper surface of the experimental platform 1. The upper ends of the vertical plates 16 are provided with a main shaft 18 arranged in the front-back direction. Guide wheels 17 are provided on the front and rear sides of the main shaft 18. The guide wheels 17 can support the pulling ropes 15, so that the pulling ropes 15 can extend vertically downward. A vertically arranged limit card slot plate 23 is provided at the left end of the first pull rod 11. The left side of the limit card slot plate 23 is an arc surface mechanism. And a limit groove is provided at the center position of the left side surface of the limit card slot plate 23. The middle part of a deflection top plate 21 is rotatably connected to the middle part of the main shaft 18. The deflection top plate 21 rotates clockwise or counterclockwise along the main shaft 18. An arc-shaped top head 22 is provided at the right end of the deflection top plate 21. Therefore, when the deflection top plate 21 rotates clockwise to the horizontal state, the arc-shaped top head 22 will abut against the limit groove in the limit card slot plate 23. At this time, the angle of the deflection top plate 21 is locked, and the first pull rod 11 is pushed to the right. At this time, the first pull rod 11 drives the L-shaped deflection plate 8 to rotate through the connecting rod 9, so that the L-shaped deflection plate 8 is in an open state. At this time, the distance between the friction blocks 25 is in the maximum state, which is convenient for the operator to clamp the friction ring 42. A front-back direction arranged stop rod 20 is provided at the left end of the deflection top plate 21. When the deflection top plate 21 rotates counterclockwise, the arc-shaped top head 22 is disengaged from the limit card slot plate 23. The counterweight 14 is placed in the relief groove 13. The gravity of the counterweight 14 tightens the pulling ropes 15. At this time, the pulling ropes 15 are in a taut state. At this time, the pulling ropes 15 will be in contact with the stop rod 20, so that the deflection top plate 21 rotates counterclockwise to a state facing the upper right. At this time, the whole device can work normally, and the deflection top plate 21 will not fall and contact the limit card slot plate 23, thus avoiding the deflection top plate 21 from affecting the leftward movement of the first pull rod 11.

[0032] In a case of this embodiment, the inner ring clamping head assembly 33 includes a second pull rod 27 slidably connected to the middle of the rotating sleeve 26. The left end of the second pull rod 27 is rotatably connected to the left end of the first support plate 28. The right end of the second support plate 30 is rotatably connected to the left side of the clamping block 29. The right side of the clamping block 29 is rotatably connected to the left end of the second support plate 30. The right end of the second support plate 30 is rotatably connected to the outside of the rotating sleeve 26. The left and right sides of the side of the clamping block 29 close to the second pull rod 27 are respectively rotatably connected to the ends of the first support plate 28 and the second support plate 30. A support frame 32 is provided at the right end of the rotating sleeve 26. The support frame 32 is a U-shaped structure with an opening to the left. The middle of the right end of the support frame 32 is threadedly connected to the middle of a pulling screw rod 31 arranged in the left-right direction. The left end of the pulling screw rod 31 is rotatably connected to the right end of the second pull rod 27. Therefore, when the pulling screw rod 31 is rotated, the pulling screw rod 31 can pull the second pull rod 27 to move left and right along the rotating sleeve 26. When the second pull rod 27 moves to the right, the first support plate 28 and the second support plate 30 will push the clamping block 29 outwards, so that the clamping block 29 can be pressed tightly against the inner side of the friction ring 42 to fix the friction ring 42. The number of the clamping blocks 29 is greater than or equal to two. In this application, it can be set to three. The three clamping blocks 29 are evenly distributed relative to the center of the rotating sleeve 26. The three clamping blocks 29 can press tightly against the inner wall of the friction ring 42 more stably. And the clamping block 29 is an L-shaped structure, that is to say, a retaining edge is provided at the right end of the clamping block 29. So that after the friction ring 42 is fixed outside the clamping block 29, the friction ring 42 will not fall off from the right end of the clamping block 29, improving the stability of the clamping block 29 for clamping the friction ring 42. And a rubber pad is provided on the side where the clamping block 29 contacts the inner wall of the friction ring 42. That is to say, the rubber pad is provided on the side of the clamping block 29 away from the center of the rotating sleeve 26. On the one hand, the rubber pad can improve the friction between the clamping block 29 and the friction block 25. On the other hand, the buffering effect of the rubber pad can prevent the clamping block 29 from scratching the inner wall of the friction ring 42.

[0033] In a case of this embodiment, a threaded sleeve 41 is sleeved on the left side of the rotating sleeve 26. A chute 40 is provided on the outer side of the threaded sleeve 41. The chute 40 is distributed circumferentially with respect to the center of the rotating sleeve 26 in the left-right direction. A slider 38 is slidably connected to the middle of the chute 40. The left end of the slider 38 is rotatably connected to the right end of the second support plate 30. And two fastening nuts 39 are threadedly connected to the right side of the threaded sleeve 41. By setting the two fastening nuts 39 to be tightly abutted against each other, the loosening of the fastening nuts 39 themselves can be avoided. And the fastening nuts 39 can limit the position of the slider 38, so that the slider 38 can only move to the state of being tightly abutted against the fastening nuts 39 to the right. Thus, in cooperation with the second pull rod 27 that moves left and right, the left and right positions of the friction ring 42 are adjusted, so that the friction block 25 can be tightly attached to the target position of the friction ring 42 for friction treatment. And a driving motor 35 is provided at the right end of the upper surface of the experimental platform 1. The output shaft of the driving motor 35 is fixedly connected with a first belt pulley 34. The first belt pulley 34 is connected to a second belt pulley 37 through a conveyor belt 36. The second belt pulley 37 is fixedly connected to the side of the rotating sleeve 26 away from the center of the experimental platform 1. The driving motor 35 realizes the rotation of the rotating sleeve 26 through the conveyor belt 36, and finally realizes the rotation of the friction ring 42.

[0034] During the implementation of this embodiment, the end cover on the top of the vacuum test box 2 is opened, the friction block 25 is installed on the fixed clamping plate 24, and the position of the fastening nut 39 is adjusted according to the size of the friction ring 42 to be tested. After the adjustment is completed, the pulling screw 31 is rotated, and the pulling screw 31 drives the second pull rod 27 to move to the right. The second pull rod 27 pushes the clamping block 29 outward through the first support plate 28 and the second support plate 30. The clamping block 29 is pressed against the inner wall of the friction ring 42. At this time, the friction ring 42 completes the clamping process. According to the friction pressure, a counterweight head 14 of appropriate weight is selected, and the deflection top plate 21 is rotated counterclockwise, and the arc-shaped top head 22 is disengaged from the limit slot plate 23. Open, at this time, place the counterweight head 14 in the middle of the clearance groove 13, and adjust the pulling rope 15 to fall on the guide wheel 17, slowly move the counterweight head 14 downward, the pulling rope 15 is tightened by the counterweight head 14, and the pulling rope 15 drives the first pull rod 11 to move to the left. At this time, the first pull rod 11 pulls the L-shaped deflection plate 8 toward the direction of the friction ring 42 through the connecting rod 9, and the friction block 25 is pressed tightly against the outside of the friction ring 42. Release the counterweight head 14, close the cover of the vacuum test box 2, start the vacuum test box 2, and judge whether the experimental environment inside the vacuum test box 2 meets the experimental requirements through various sensors, and start the entire friction experiment after standing for a period of time according to the experimental standards. Experiments in thermal vacuum environments involve dangerous factors such as high temperature and high vacuum. Experimenters must strictly abide by operating procedures and wear protective equipment to prevent accidents such as burns, electric shocks and vacuum leaks. Therefore, it is necessary to adjust the temperature and air pressure after the end cover of the vacuum test box 2 is sealed, so that the operator can be separated from the high temperature and high pressure environment. Equipment such as vacuum systems and heating systems are relatively complex and require regular maintenance and upkeep to ensure the performance and stability of the equipment. During the experiment, pay close attention to the operating status of the equipment and promptly handle any faults and problems that arise. There may be a variety of factors that cause errors during the experiment, such as vacuum fluctuations, uneven temperature, sample installation errors, etc. Effective measures need to be taken to control and calibrate to improve the accuracy and reliability of experimental data. Temperature control and pressure control are routine equipment maintenance, so I will not go into detail on how to operate them.

[0035] The friction block 25 and the friction ring 42 need to be made of suitable materials according to the experimental requirements, and surface treatment such as polishing and cleaning is performed to ensure the flatness and cleanliness of the sample surface, and then the sample is installed in the friction experiment device. The vacuum test box 2 starts the vacuum system, heating and temperature control system and friction experiment device, debugs the parameters of each system to achieve the vacuum degree, temperature and motion parameters required for the experiment, and performs calibration and testing to ensure the normal operation of the equipment.

[0036] Start the drive motor 35. The drive motor 35 rotates the rotating sleeve 26 through the conveyor belt 36. The rotating sleeve 26 drives the friction ring 42 to start high-speed self-rotation. The friction ring 42 and the friction block 25 have relative displacement. The change of the friction position is continuously photographed by the high-speed camera installed inside the vacuum test chamber 2. As the friction between the friction ring 42 and the friction block 25 continues, the thicknesses of the friction ring 42 and the friction block 25 continuously change. At this time, the first pull rod 11 continuously moves to the left, and the friction block 25 always maintains a state of being pressed against the friction ring 42, always maintaining the friction effect. During the experiment, under the set thermal vacuum environment, the friction block 25 and the friction ring 42 are subjected to different normal loads by the pressing mechanism 3, and the rotating mechanism makes the friction ring 42 perform relative movement at a certain speed and stroke. The measurement system records the changes of parameters such as the friction coefficient and the frictional force in real time. At the same time, the monitoring equipment is used to observe and record the phenomena and wear conditions during the friction process. After the experiment, the collected data is sorted and analyzed, and the change curves of the friction coefficient with parameters such as time, load, and temperature are drawn. Combining the images and analysis results obtained by the monitoring equipment, the friction and wear characteristics and mechanisms of materials under the thermal vacuum environment are studied.

[0037] When the friction experiment is completed, stop the drive motor 35. After the temperature and air pressure inside the vacuum test chamber 2 return to the normal state, open the cover plate on the top of the vacuum test chamber 2. First, lift the counterweight 14 and place it on the left end of the upper surface of the experimental platform 1. Rotate the deflection top plate 21 clockwise, and the arc-shaped top head 22 presses tightly in the middle of the limit card slot plate 23. At this time, the friction block 25 is disengaged from the friction ring 42. Rotate the pulling screw rod 31 in the reverse direction. The pulling screw rod 31 pushes the second pull rod 27 to the left, and the clamping block 29 is loosened from the friction ring 42. Take out the friction ring 42, and remove the friction block 25 from the fixed clamping plate 24. Subsequently, continue to detect and process the friction ring 42 and the friction block 25.

[0038] The present invention is applicable to a friction experiment device for a thermal vacuum environment. By setting the constant-tension pressing component 12 to continuously pull the first pull rod 11 to move, the friction block 25 is always kept under a pressing force to perform friction treatment along the outer wall of the friction ring 42, so that even if the thickness of the friction ring 42 and the friction block 25 changes after long-term friction, effective friction treatment can still be carried out, thereby simulating the friction effect under actual use conditions and making the final experimental results more accurate. And compared with the traditional method of fixing the friction block 25 by bolt connection, on the one hand, as the experiment progresses, the thickness of the friction block 25 decreases, and the bolt connection cannot timely push the friction block 25 to move, thus reducing the pressure on the friction surface and the frictional force. On the other hand, since the vacuum test chamber 2 needs to conduct experiments in a high-temperature and vacuum environment, the high temperature may affect the fixing effect of the bolts. That is to say, even if there is sufficient pressure between the friction block 25 and the friction ring 42 to achieve frictional force during the clamping stage, as the temperature rises, the bolts will deform, and at this time, the pressure between the friction block 25 and the friction ring 42 will change, thus affecting the progress of the entire friction experiment. However, in this application, the constant-tension pressing component 12 on the left side and the pulling lead screw 31 on the right side are both arranged outside the vacuum test chamber, that is to say, the high temperature will not affect the normal operation of these pressure-providing components, thereby ensuring the pressure stability during the experiment.

[0039] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

Claims

1. A friction test device in a thermal vacuum environment, comprising an experimental platform, a vacuum test box is arranged on the experimental platform, and auxiliary supporting side plates are arranged on both sides of the vacuum test box, characterized in that: It also includes a pressure mechanism and a rotation mechanism; The pressure-applying mechanism includes a support sleeve arranged on an auxiliary supporting side plate on one side, a first pull rod slidably connected to the auxiliary supporting side plate is arranged inside the support sleeve, and a constant tension pressure-applying component for driving the first pull rod to move toward a direction away from the center of the experimental platform is arranged on the auxiliary supporting side plate, an extension plate is arranged on the outer side of the support sleeve, and the end of the extension plate close to the center of the experimental platform is rotatably connected to the middle part of the L-shaped deflection plate, and a friction block is arranged on the end of the L-shaped deflection plate close to the experimental platform, and a push plate is arranged at the end of the first pull rod, and the end of the push plate is rotatably connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the end of the L-shaped deflection plate away from the center of the experimental platform. The constant tension pressure-applying component includes a cross bar arranged on the side of the first pull rod away from the center of the experimental platform, the cross bar is connected to one end of a pulling rope, and the other end of the pulling rope is provided with a matching The balance head is characterized in that a limit slot plate is provided at one end of the first pull rod away from the center of the experimental platform, a deflection top plate is rotatably connected to the middle part of the main shaft, an arc-shaped top head is provided at the end of the deflection top plate, and when the deflection top plate is rotated to contact with the arc-shaped top head, the L-shaped deflection plate is in an unfolded state relative to the support sleeve, characterized in that a stop rod is provided at one end of the deflection top plate away from the arc-shaped top head, and when the stop rope is in a tensioned state under the action of the gravity of the balance head, the stop rope is tightly attached to the outside of the stop rod; The rotating mechanism includes a rotating sleeve rotatably connected to the auxiliary supporting side plate on the other side. An inner ring clamping head assembly is arranged on the side of the rotating sleeve close to the center of the experimental platform. A friction ring cooperating with the friction block is detachably connected to the outside of the inner ring clamping head assembly.

2. A friction test device in a thermal vacuum environment according to claim 1, characterized in that: The number of the protruding plates is greater than or equal to two, and the protruding plates are evenly distributed relative to the center of the support sleeve. The end of the L-shaped deflection plate close to the center of the experimental platform is rotatably connected to a fixed clamping plate, and a friction block is detachably connected to the fixed clamping plate.

3. The friction test device in a thermal vacuum environment according to claim 1, characterized in that: The inner ring clamping head assembly includes a second pull rod slidably connected to the middle part of the rotating sleeve, one end of the second pull rod close to the center of the experimental platform is rotatably connected to one end of the first support plate, the other end of the first support plate is rotatably connected to one side of the clamping block, the other side of the clamping block is rotatably connected to one end of the second support plate, and the other end of the second support plate is rotatably connected to the outside of the rotating sleeve.

4. The friction test device in a thermal vacuum environment according to claim 3, characterized in that: A support frame is arranged at one end of the rotating sleeve away from the center of the experimental platform, the middle part of the support frame is threadedly connected to the middle part of the pulling wire rod, and the end of the pulling wire rod is rotatably connected to the end of the second pulling rod.

5. The friction test device in a thermal vacuum environment according to claim 4, characterized in that: The number of the clamping blocks is greater than or equal to two, the clamping blocks are evenly distributed relative to the center of the rotating sleeve, the clamping blocks are L-shaped structures, and a rubber pad is arranged on the side of the clamping block that contacts the inner wall of the friction ring.

6. The friction test device in a thermal vacuum environment according to claim 5, characterized in that: A threaded sleeve is provided on the side of the rotating sleeve close to the center of the experimental platform, a sliding groove is provided on the outside of the threaded sleeve, the sliding groove is slidably connected to a slider, the slider is rotatably connected to the end of the second support plate, and two fastening nuts threadedly connected to the threaded sleeve are provided on the side of the slider away from the center of the experimental platform.

7. The friction test device in a thermal vacuum environment according to claim 1, characterized in that: The experimental platform is provided with a driving motor, the output shaft of the driving motor is fixedly connected to a first transmission pulley, the first transmission pulley is connected to a second transmission pulley via a conveyor belt, and the second transmission pulley is fixedly connected to a side of a rotating sleeve away from the center of the experimental platform.

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