Rotary friction wear experimental device in lunar dust environment

Abstract

The utility model discloses a rotary frictional wear experimental device in a lunar dust environment. The device comprises a lunar dust particle and low-gravity system and a rotary frictional wear experimental platform system. The rotary friction wear experiment platform is designed to be used for fixing a test sample and can rotate at different speeds and loads so as to simulate various motion conditions possibly encountered by the lunar surface. The system for simulating the lunar environment is composed of a bearing table, a vacuum box and various sensors and can measure the particle concentration in the lunar dust environment so as to simulate the influence of lunar dust on friction and wear of materials. According to the invention, the wear degree of the lunar dust environment on the material can be accurately simulated, and a reliable experimental platform is provided for researching the long-term influence of the lunar dust on the spacecraft surface material. By using the device, a researcher can evaluate the wear resistance of different materials in a simulated lunar dust environment, so that a scientific basis is provided for selection and improvement of surface materials of the lunar probe.

Description

Technical Field

[0001] The present invention relates to the technical field of friction and wear experiments, and in particular to a rotating friction and wear experiment device in a lunar dust environment. Background Art

[0002] As space exploration continues, humanity's understanding of celestial bodies, such as the Moon, continues to grow. The lunar surface environment is unique and challenging, characterized by extreme temperature fluctuations, high vacuum, microgravity, and the presence of lunar dust. Lunar dust, the dust covering the lunar surface, is primarily unbounded particulate matter produced by repeated meteorite impacts during the Moon's formation. It primarily consists of crystalline particles, along with larger igneous rock fragments, glassy fragments (including numerous glass spherules), and trace metal particles. Its sharp edges and electrostatic properties pose a potential threat to the safety of space equipment and astronauts. Lunar exploration and long-term habitation programs place extremely high demands on the durability, wear resistance, and reliability of materials. The wear of lunar dust on equipment and structures is a significant consideration, as it can affect their operating efficiency and lifespan. Therefore, studying the friction and wear properties of lunar dust on materials is crucial for the design and selection of materials suitable for the lunar environment.

[0003] Currently, friction and wear experiments on Earth are typically conducted under standard atmospheric conditions, which differ significantly from the lunar environment. To more accurately simulate the lunar environment, it is necessary to develop a device capable of conducting rotational friction and wear experiments in a simulated lunar dust environment. Existing experimental devices typically only consider single factors, such as temperature, pressure, or vacuum, without comprehensively considering complex factors such as lunar dust lift and deposition. Furthermore, existing experimental devices often lack the ability to precisely control and measure parameters such as friction, temperature, and pressure, limiting the accuracy and reliability of experimental results. Prior art application number CN201810148119.1 discloses a lunar dust environment simulation test device and method, which simulates the vacuum, dust emission, and dust removal components of lunar dust. Prior art application number CN202011631570.2 discloses a vacuum experimental device for bearing friction and wear experiments using chain link loading, which is capable of simulating vacuum experiments. The above existing technologies are either single lunar dust environment simulation devices or friction and wear devices that simulate vacuum environments. They are unable to simulate the friction and wear performance of samples in lunar dust environments. Therefore, it is necessary to invent a device that can test the friction and wear performance of materials in a simulated lunar dust environment.

[0004] Based on the above, the present invention proposes a new type of rotational friction and wear experimental device in a lunar dust environment, which aims to provide a more accurate and comprehensive experimental platform for the study of friction and wear characteristics of materials by simulating the rotational friction conditions on the lunar surface and the electrostatic suspension process of lunar dust. Summary of the Invention

[0005] 1. Technical problems to be solved:

[0006] In response to the above technical problems, the present invention provides a rotational friction and wear experimental device in a lunar dust environment, which can simulate the rotational friction conditions on the lunar surface and the electrostatic suspension process of lunar dust, providing a more accurate and comprehensive experimental platform for the study of the friction and wear characteristics of materials.

[0007] 2. Technical solution:

[0008] A rotational friction and wear experimental device in a lunar dust environment, characterized by comprising lunar dust particles and a low-gravity system and a rotational friction and wear experimental platform system; the lunar dust particles and low-gravity system are used to provide lunar dust particles and a low-gravity environment for the rotational friction and wear experimental platform; the rotational friction and wear experimental platform system is used to provide a rotatable friction and wear experiment on the experimental sample;

[0009] The lunar dust particle and low-gravity system includes a vacuum box and a supporting platform for placing the vacuum box; the vacuum box is provided with a hatch and a glass observation window, and the vacuum box is provided with an air pressure sensor, a particle concentration sensor, a lighting system, a temperature control system, and a lunar dust electrostatic suspension system; the vacuum box is connected to a vacuum pump outside the box, and the air pressure inside the vacuum box is controlled by the air pressure sensor; the particle concentration sensor is used to detect the particle concentration generated during the dust raising process in the vacuum box; the lighting system is used to illuminate the vacuum box to facilitate experimenters to observe the scene inside the box through the glass observation window; the temperature control system is used to control the temperature of the vacuum box; the lunar dust electrostatic suspension system includes a lunar dust chassis and an electrostatic suspension device, and the concentration of suspended particulate matter is controlled by controlling the electrostatic strength of the electrostatic suspension device;

[0010] The rotary friction and wear experimental platform system includes a base and a hollow cylindrical mounting seat installed on the upper surface of the base; two upper and lower through holes are provided on the side wall of the mounting seat; a lifting rod is provided between the upper and lower ends of the upper through hole, and the lifting rod is connected to the moving platform transmission to enable the lifting platform to move up and down; a friction head device is provided below the lifting platform; the friction head device includes a friction head, a sensor for measuring contact pressure, a sensor for measuring friction force, and a motor automatic loading weight device; a rotating table device is provided directly below the friction head device; the rotating table device includes a rotating table for placing experimental samples, a rotating motor, and a rotating table base; the rotating table is rotatably fixed to the surface of the rotating table base and is connected to the rotating motor through a transmission device to control the rotation of the rotating table; the rotating motor is fixed to the cavity of the mounting seat through the through hole below the mounting seat;

[0011] The vacuum pump and its control module, the temperature control system control module, the lunar dust electrostatic suspension system control module, the lighting control module and the control module for controlling the rotating motor constitute a control system; the control system and the power supply system are both arranged in the space below the supporting platform.

[0012] Furthermore, the rotating platform of the rotating friction and wear experimental platform system is a cylindrical platform, and the experimental sample is fixed on the platform by a clamp.

[0013] Furthermore, the transmission device of the rotary table device includes a transmission shaft and a transmission pulley; the transmission shaft to which the rotary table is fixedly connected is connected to the output shaft of the drive motor through the transmission pulley.

[0014] Furthermore, an electrostatic suspension device is provided around the rotating table, and the main body of the electrostatic suspension device is provided around the supporting platform, and the generated lunar dust particles cover the contact area between the experimental sample and the friction head.

[0015] Furthermore, the lifting rod is installed with a translation rod, and the translation rod is connected to the lifting platform to achieve the lifting and lowering movement of the lifting platform.

[0016] Furthermore, a handle is provided on the upper surface of the vacuum box.

[0017] 3.Beneficial effects:

[0018] (1) The lunar dust particles and low gravity system provided by this method can not only simulate the vacuum state, simulate the low temperature and high temperature state, but also simulate the dust on the lunar surface; accurately reproduce the unique environmental conditions on the lunar surface, such as temperature, pressure and vacuum degree, as well as the concentration of lunar dust particles.

[0019] (2) The core of this device is a rotating friction and wear experimental platform system set up in the lunar dust particle and low gravity system. The vacuum test platform creates a vacuum environment, and the friction and wear tester is used to fix the test sample and apply friction. The design of the vacuum test platform ensures the accuracy and repeatability of the experimental conditions. This device can accurately simulate the wear effect of the lunar dust environment on materials, providing a reliable experimental platform for studying the long-term impact of lunar dust on spacecraft surface materials.

[0020] (3) The present invention is equipped with various high-precision data acquisition systems to ensure real-time recording of key parameters during the experiment. The design of the instrument takes into account the ease and safety of operation, making the experimental process more efficient and safe. In addition, it can comprehensively evaluate the friction and wear properties of materials in the lunar dust environment, providing an important scientific basis for the selection and optimization of spacecraft materials.

[0021] In summary, by using this device, researchers can evaluate the wear resistance of different materials in a simulated lunar dust environment, thereby providing a scientific basis for the selection and improvement of spacecraft surface materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an external view of a rotational friction and wear experimental device in a lunar dust environment according to the present invention;

[0023] Figure 2 This is a front cross-sectional view of a rotational friction and wear experimental device in a lunar dust environment according to the present invention;

[0024] Figure 3 This is a rear cross-sectional view of a rotational friction and wear experimental device in a lunar dust environment according to the present invention;

[0025] Figure 4 This is the overall structural diagram of the rotary friction and wear experimental platform system in the present invention;

[0026] Figure 5 is a schematic diagram of the electrostatic levitation zone in the present invention;

[0027] Figure 6 A side view of a rotational friction and wear experimental device in a lunar dust environment.

[0028] Figure 1: Vacuum chamber 1; glass window 2; carrying platform 3; temperature control system 4; vacuum pump 5; power supply system 6; controller 7; hatch 8; hand 9; air pressure sensor 10; particle concentration sensor 11; lighting system 12; mounting base 13; translation rod 14; motor automatic weight loading device 15; weight 16; driving motor 17; base 18; transmission pulley 19; transmission shaft 20; rotating platform 21; friction head 22; force sensor 23; moving platform 24; lifting rod 25; electrostatic suspension area 26. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings.

[0030] As attached Figure 1 To the attached Figure 6 As shown, a rotational friction and wear experimental device in a lunar dust environment is characterized by comprising lunar dust particles and a low gravity system and a rotational friction and wear experimental platform system; the lunar dust particles and low gravity system are used to provide lunar dust particles and a low gravity environment to the rotational friction and wear experimental platform; the rotational friction and wear experimental platform system is used to provide a rotatable friction and wear experiment on the experimental sample;

[0031] The lunar dust particle and low-gravity system includes a vacuum box 1 and a supporting platform 3 for placing the vacuum box; the vacuum box is provided with a hatch 8 and a glass observation window 2, and the vacuum box is provided with an air pressure sensor 10, a particle concentration sensor 11, a lighting system 12, a temperature control system 4, and a lunar dust electrostatic suspension system; the vacuum box is connected to a vacuum pump 5 outside the box, and the air pressure inside the vacuum box is controlled by the air pressure sensor; the particle concentration sensor is used to detect the particle concentration generated during the dust raising process in the vacuum box; the lighting system is used to illuminate the vacuum box to facilitate experimenters to observe the scene inside the box through the glass observation window; the temperature control system is used to control the temperature of the vacuum box; the lunar dust electrostatic suspension system includes a lunar dust chassis and an electrostatic suspension device, and the concentration of suspended particulate matter is controlled by controlling the electrostatic strength of the electrostatic suspension device;

[0032] The rotary friction and wear experimental platform system includes a base 18 and a hollow cylindrical mounting base 13 installed on the upper surface of the base; two upper and lower through holes are set on the side wall of the mounting base; a lifting rod is set between the upper and lower ends of the upper through hole, and the lifting rod 25 is transmission-connected to the moving platform 24 to enable the lifting platform to move up and down; a friction head device is set below the lifting platform; the friction head device includes a friction head 22, a sensor for measuring contact pressure, a sensor for measuring friction force, and a motor automatic loading weight device 15; a rotating table device is set directly below the friction head device; the rotating table device includes a rotating table 21 for placing experimental samples, a rotating motor, and a rotating table base; the rotating table is rotatably fixed to the surface of the rotating table base and is connected to the rotating motor through a transmission device to control the rotation of the rotating table; the rotating motor is fixed to the cavity of the mounting seat through the through hole below the mounting seat;

[0033] The vacuum pump and its control module, the temperature control system control module, the lunar dust electrostatic suspension system control module, the lighting control module and the control module for controlling the rotating motor constitute a control system; the control system and the power supply system 6 are both arranged in the space below the supporting platform.

[0034] Furthermore, the rotating platform of the rotating friction and wear experimental platform system is a cylindrical platform, and the experimental sample is fixed on the platform by a clamp.

[0035] Furthermore, the transmission device of the rotary table device includes a transmission shaft 20 and a transmission pulley 19; the transmission shaft to which the rotary table is fixedly connected is connected to the output shaft of the drive motor through the transmission pulley.

[0036] Furthermore, an electrostatic levitation device is provided around the rotating platform. The main body of the electrostatic levitation device is provided around the supporting platform. The lunar dust particles generated by the device cover the contact area between the experimental sample and the friction head. 26 in the figure shows the electrostatic levitation area generated by the device.

[0037] Furthermore, the lifting rod is installed with a translation rod 14, and the translation rod is connected to the lifting platform to achieve the lifting and lowering movement of the lifting platform.

[0038] Furthermore, a handle 9 is provided on the upper surface of the vacuum box.

[0039] A rotational friction and wear experimental method in a lunar dust environment, comprising:

[0040] Step 1: Install the experimental equipment, including fixing the experimental sample to the surface of the rotating table; adjusting the height of the moving table so that the friction head is close to the surface of the experimental sample, placing lunar dust, and closing the hatch;

[0041] Step 2: Turn on the vacuum pump through the control system to simulate the vacuum state of space, and observe the air pressure in the vacuum box through the air pressure sensor;

[0042] Step 3: Simulate the lunar dust state; turn on the lunar dust electrostatic suspension system and control the concentration of lunar dust particles by adjusting the electrostatic intensity;

[0043] Step 4: Temperature simulation: The temperature inside the vacuum chamber is controlled by a temperature control system, thereby simulating the temperature under vacuum conditions during lunar day and lunar night.

[0044] Step 5: Input the friction pressure, rotation speed and rotation time of the turntable from the control system to start the friction and wear test. The friction coefficient is automatically calculated by the friction and pressure sensors, and the wear rate is analyzed after the test. Specific embodiment:

[0046] As attached Figure 1-6 As shown, a rotational friction and wear experimental device in a lunar dust environment in this embodiment includes lunar dust particles, a low gravity system, and a rotational friction and wear experimental platform system.

[0047] In this embodiment, an air pressure sensor 10 is fixedly installed on the vacuum box 1, and the sensor head of the air pressure sensor 10 is arranged inside the vacuum box for real-time monitoring and recording of the air pressure changes in the vacuum box during the experiment. A particle concentration sensor 11 and a lighting system 12 are also installed inside the vacuum box 1. The particle concentration sensor 11 is responsible for measuring the concentration of particles generated by dust during the experiment, thereby quantifying the number of particles when lunar dust is raised. The lighting system 12 provides a light source for the vacuum box 1, which is convenient for observing the experimental process. The temperature control system 4 can adjust the temperature inside the vacuum box 1 to simulate the low / high temperature environment on the surface of the moon. A handle 9 is hinged on the upper surface of the empty box to facilitate the disassembly of the test device during maintenance.

[0048] The rotary friction and wear test platform system is fixed on the dust test platform. The test sample is placed on a rotating table 21, which is driven by a rotating motor 17 to achieve rotational motion, so that the friction head 22 contacts the surface of the test sample and generates friction. While the lunar dust suspension rotary friction and wear tester is running, the interior of the vacuum box 1 simulates the lunar dust environment to realize the rotary friction and wear experiment under simulated lunar dust conditions. The electrostatic suspension rotary friction and wear tester consists of two parts: a rotating table control unit and a friction head control unit. The rotating table control unit is fixed to the base 18 by bolts, while the friction head control unit is fixed to the mounting base 13 by a transmission structure.

[0049] The friction head control unit includes a cylindrical mounting base 13 with a clamp. A lifting rod 25 is hingedly connected to the inner wall of the mounting base for vertical movement. A translation rod 14 is mounted on the lifting rod 25, supporting a movable platform 21 for horizontal movement. A force sensor 23 for measuring pressure and friction is hingedly mounted on the movable platform 21. This sensor is connected to a motor-driven automatic weight loading device 15, which is equipped with weights 16 to control the pressure applied to the sample. The friction and wear test bench also includes a grooved rotating platform 21, which is connected to a drive motor 17 via a drive pulley 19 to rotate the platform. A controller 7 for the control system is located at the base of the platform. This controller 7 regularly controls the forward and reverse rotation of the platform 21, ensuring precise control of the platform. Furthermore, an electrostatic levitation zone 26 is positioned around the rotating platform 21 to simulate the low gravity environment of the lunar surface. Volcanic ash was used in place of lunar dust in the test apparatus.

[0050] The entire experimental bench is designed to provide a flexible and precise lunar dust and sample manipulation platform to meet complex experimental needs.

[0051] Although the present invention has been disclosed above in terms of preferred embodiments, they are not intended to limit the present invention. Anyone skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection defined by the claims of this application.

Claims

1. A rotational friction and wear experimental device in a lunar dust environment, characterized by: It includes a lunar dust particle and low gravity system and a rotating friction and wear experimental platform system; the lunar dust particle and low gravity system is used to provide lunar dust particles and a low gravity environment for the rotating friction and wear experimental platform; the rotating friction and wear experimental platform system is used to provide a rotatable friction and wear experiment on the experimental sample; The lunar dust particle and low-gravity system includes a vacuum box and a supporting platform for placing the vacuum box; the vacuum box is provided with a hatch and a glass observation window, and the vacuum box is provided with an air pressure sensor, a particle concentration sensor, a lighting system, a temperature control system, and a lunar dust electrostatic suspension system; the vacuum box is connected to a vacuum pump outside the box, and the air pressure inside the vacuum box is controlled by the air pressure sensor; the particle concentration sensor is used to detect the particle concentration generated during the dust raising process in the vacuum box; the lighting system is used to illuminate the vacuum box to facilitate experimenters to observe the scene inside the box through the glass observation window; the temperature control system is used to control the temperature of the vacuum box; the lunar dust electrostatic suspension system includes a lunar dust chassis and an electrostatic suspension device, and the concentration of suspended particulate matter is controlled by controlling the electrostatic strength of the electrostatic suspension device; The rotary friction and wear experimental platform system includes a base and a hollow cylindrical mounting seat mounted on the upper surface of the base; the side wall of the mounting seat is provided with upper and lower through holes; a lifting rod is provided between the upper and lower ends of the upper through holes, and the lifting rod is connected to the movable platform for transmission to enable the lifting platform to move up and down; a friction head device is provided below the lifting platform; the friction head device includes a friction head, a sensor for measuring contact pressure, a sensor for measuring friction force, and a motor-automatic weight loading device; A rotating table device is provided directly below the friction head device; the rotating table device comprises a rotating table for placing the experimental sample, a rotating motor, and a rotating table base; the rotating table is rotatably fixed to the surface of the rotating table base and is connected to the rotating motor via a transmission device to control the rotation of the rotating table; the rotating motor is fixed to the cavity of the mounting seat through a through hole below the mounting seat; The vacuum pump and its control module, the temperature control system control module, the lunar dust electrostatic suspension system control module, the lighting control module and the control module for controlling the rotating motor constitute a control system; the control system and the power supply system are both arranged in the space below the supporting platform.

2. The rotational friction and wear experimental device in a lunar dust environment according to claim 1, characterized in that: The rotating platform of the rotating friction and wear experimental platform system is a cylindrical platform, and the experimental sample is fixed on the platform by a clamp.

3. The rotational friction and wear experimental device in a lunar dust environment according to claim 1, characterized in that: The transmission device of the rotating table device includes a transmission shaft and a transmission pulley; the transmission shaft fixedly connected to the rotating table is connected to the output shaft of the driving motor through the transmission pulley.

4. The rotational friction and wear experimental device in a lunar dust environment according to claim 1, characterized in that: An electrostatic suspension device is provided around the rotating platform, and the main body of the electrostatic suspension device is provided around the supporting platform. The lunar dust particles generated by the electrostatic suspension device cover the contact area between the experimental sample and the friction head.

5. The rotational friction and wear experimental device in a lunar dust environment according to claim 1, characterized in that: The lifting rod is installed with a translation rod, and the translation rod is connected to the lifting platform to realize the lifting and lowering movement of the lifting platform.

6. The rotational friction and wear experimental device in a lunar dust environment according to claim 1, characterized in that: A handle is provided on the upper surface of the vacuum box.

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