Fretting wear test method and device for simulating deep sea corrosion environment

Abstract

The invention relates to the technical field of fretting wear experiments, and discloses a fretting wear test method and device for simulating a deep sea corrosion environment, and the device comprises a glove box, a high-pressure test kettle, a liquid storage kettle and a fretting wear test module, the temperature control and heat preservation device on the outer wall of the bottom of the kettle body and the hydrochemistry and pressurization loop can enable the interior of the kettle body to reach the temperature and pressure conditions preset for the test, the dynamic wear test module is loaded on a kettle cover of the high-pressure test kettle, and position movement closed-loop precision control and real-time online measurement and collection of normal force and friction force in the test process can be achieved. The device can achieve the purpose of simulating a seawater environment, meets the quasi-in-situ characterization test requirements of a test sample, and solves the problem that fretting wear test equipment cannot meet deep sea actual service environment simulation in current domestic and overseas instrument markets. Therefore, basic research is not thorough enough, and fretting wear protection measures in the actual engineering field are difficult to explore.

Description

Technical Field

[0001] The present invention relates to the technical field of fretting wear experiments, and more particularly to a fretting wear test method and a device thereof for simulating a deep-sea corrosion environment. Background Art

[0002] With the deepening of the strategy of building a strong maritime nation, my country's independently developed high-tech equipment (defense and marine engineering equipment such as offshore drilling platforms, offshore wind power / nuclear power, ships and port machinery) has been put into service one after another, and the application scenarios have expanded from nearshore to offshore, and from shallow sea to deep sea. The mechanical motion system components in high-end equipment are directly exposed to high-pressure, high-salt deep-sea environments. The corrosion caused by the chemistry / electrochemistry of seawater and the friction and wear interaction caused by external stress and other factors have sharply accelerated the damage and failure of metal materials. Fretting damage is a complex damage form that combines the four basic mechanisms of adhesion, abrasive particles, fatigue and corrosion (tribochemistry). The coupling of multiple physical fields such as friction stress-corrosive medium-thermal stress in the marine environment will inevitably accelerate the fretting or fatigue failure of metal materials, seriously affecting the operating stability and service life of key structural parts. However, the current research on the service behavior of materials under actual service conditions in deep-sea environments is an understudied area of ​​micro-tribology. In addition to the fact that many people do not have a good understanding of its harmfulness, it is also difficult to study, mainly because it is difficult to simulate the experiments of extreme service conditions, and its damage mechanism is complex and has not yet been fully revealed.

[0003] At present, in the domestic and foreign instrument markets, the fretting wear test equipment simulates a single environment (mostly atmospheric environment or atmosphere environment), and the technical indicators are backward (the movement range exceeds the scope of fretting), which is far from meeting the needs of simulating fretting wear in the actual deep-sea service environment. As a result, basic research is not thorough enough, and there is a lack of protective measures for fretting wear in the actual engineering field. Therefore, it is urgent to design fretting wear test equipment that can simulate complex and harsh service environments, has comprehensive functions and advanced indicators. Summary of the invention

[0004] In view of this, the present invention provides a micro-motion wear testing method and a device for simulating a deep-sea corrosion environment, which can achieve the purpose of simulating the actual deep-sea service environment and meet the needs of quasi-in-situ characterization and detection of specimens, and solve the problems of backward technical indicators and single simulation environment of existing micro-motion wear testing machines on the market. It is of great significance for the basic research on tangential micro-motion wear in a simulated deep-sea service environment and the exploration of protection against micro-motion wear in actual engineering fields.

[0005] To achieve the above-mentioned purpose, the present invention provides a micro-motion wear test device for simulating a deep-sea corrosion environment, comprising an external glove box, a high-pressure test kettle and a liquid storage kettle, wherein the front side of the external glove box is provided with gloves and glove holes, the right side is connected to an inert gas cylinder through a pipeline, and a vacuum gauge a is provided on the top, a sample transfer cabin is provided on the upper left side of the external glove box, and the lower left side is connected to a vacuum pump group through a gas pipeline, and plug valves are installed on the left and right sides of the sample transfer cabin, the left side of the sample transfer cabin is used to be connected to the external vacuum environment, the right side is connected to the inside of the external glove box, the bottom is connected to the vacuum pump group through a gas pipeline, and a vacuum gauge c is installed on the top; The high-pressure test kettle is arranged inside the external glove box, and the liquid storage kettle is arranged outside the external glove box. The high-pressure test kettle comprises a kettle body and a kettle cover installed at the top of the kettle body. The kettle body and the kettle cover form a closed chamber. The closed chamber is sequentially connected and communicated with a booster pump and a water chemical treatment circuit through a connecting hole on the kettle cover through a pipeline. A micro-motion wear test module and a vacuum gauge b are installed on the kettle cover. The bottom of the kettle body is connected and communicated with the liquid storage kettle through a pipeline and a two-way water pump. The micro-motion wear test module includes a linear guide rail and a guide rod. The linear guide rail is fixedly arranged on the upper side of the kettle cover along a direction in which the axis is perpendicular to the kettle cover. The guide rod is installed on the linear guide rail along a direction in which the axis is perpendicular to the kettle cover. The upper end of the guide rod is located outside the high-pressure test kettle and connected to the output end of the electromagnetic exciter. The lower end of the guide rod is located inside the high-pressure test kettle and is installed with a sample fixture I. A test lever is provided on the lower side of the kettle cover. The upper end of the test lever is hinged to the kettle cover through a lever hinge. The lower end of the test lever is provided with a sample fixture II corresponding to the sample fixture I. The test lever is rotated through the lever hinge to make the sample fixture I and the sample fixed on the sample fixture II come into contact. The fretting wear test module also includes a data acquisition unit, which is connected to a host computer to achieve real-time acquisition and feedback of index parameters during the fretting wear test.

[0006] Preferably, a lifting control mechanism is installed at the upper ends of both sides of the kettle body, and the kettle cover and the micro-wear test module installed on the kettle cover are driven to rise and fall together by the lifting control mechanism, and the kettle cover and the lifting control mechanism are locked by screws.

[0007] Preferably, a normal force loading device is installed on the lower side of the kettle cover, the end of the normal force loading device is in contact with the lower end of the test lever, and a spring compensation mechanism is provided in the normal force loading device, which applies a lateral force to the test lever through the spring compensation mechanism, so that the test lever generates a normal force relative to the movement direction of the guide rod.

[0008] Preferably, the data acquisition unit includes a displacement sensor, a dynamic force sensor and a friction force sensor. The displacement sensor is installed on the slider of the linear guide rail to collect the change in the relative displacement of the grinding pair through the sliding distance of the slider. The dynamic force sensor is installed at the output end of the electromagnetic exciter to perform real-time feedback measurement and control compensation of the normal load of the guide rod during the test. The friction force sensor is installed at the upper end of the test lever to measure in real time the friction force generated by the relative tangential motion of the grinding pair during the test.

[0009] Preferably, the dynamic force sensor and the friction force sensor are both optical fiber force sensors, and the displacement sensor is a grating displacement sensor.

[0010] Preferably, the external glove box, the high-pressure test kettle and the liquid storage kettle are all installed on the test system base, and the lower half of the kettle body and the liquid storage kettle are both embedded in the test system base.

[0011] Preferably, a temperature control device is installed on the outer side wall of the kettle body embedded in the test system base, and the outer side of the temperature control device is covered with a thermal insulation layer.

[0012] Preferably, the electromagnetic exciter is driven by a voice coil motor to drive the guide rod, the test fixture I and the sample to perform longitudinal reciprocating motion together.

[0013] Preferably, a gas flow meter is installed on the pipeline connecting the external glove box and the inert gas cylinder.

[0014] The present invention provides a fretting wear test method for simulating a deep-sea corrosion environment, comprising: 1) Before the test, open the inert gas cylinder, introduce inert gas into the external glove box, and use a vacuum pump group to control the air pressure inside the external glove box, and observe it through a vacuum gauge a to ensure that the air pressure inside the external glove box reaches the standard atmospheric pressure; 2) Control the lifting control mechanism to drive the kettle cover to rise, so that the kettle cover drives the fretting wear test module to rise to a certain height, rotate the lever hinge clockwise to lift the test lever, install the sample fixture I and the sample fixture II, and then install the grinding samples on the corresponding sample fixtures respectively. After the installation is completed, rotate the lever hinge counterclockwise to make the grinding samples on the sample fixtures I and II contact; 3) Lower the kettle cover and the test module, and use screws to lock the kettle cover and the lifting control mechanism so that the kettle cover and the kettle body form a closed chamber, and start the two-way water pump to transport the seawater stored in the liquid storage kettle to the interior of the high-pressure test kettle; 4) Start the booster pump and water chemical treatment circuit, observe the reading of the vacuum gauge b, and operate the temperature control device to make the pressure and temperature environment inside the high-pressure test kettle reach the preset test pressure and temperature environment; 5) Set the various parameters and indicators of the test in the system operation program of the host computer, and then start the micro-motion wear test; 6) After the test is completed, turn on the two-way water pump to release the pressure of the high-pressure test kettle, so that the seawater inside the high-pressure test kettle flows back into the liquid storage kettle, lift the kettle cover and the fretting wear test module through the lifting control mechanism, remove the sample from the sample fixture I and sample fixture II and dry it; 7) Open the gate valve on the right side of the sample transfer cabin, send the sample into the sample transfer cabin, then close the gate valve, start the vacuum pump group, observe the reading of the vacuum gauge c, and when the vacuum degree inside the transfer cabin is consistent with the vacuum degree of the external vacuum environment, open the gate valve on the left side of the transfer cabin, send the sample into the characterization test instrument under the protection of the external vacuum environment, perform subsequent characterization operations, and then close the gate valve on the left side.

[0015] It can be seen from the above technical solutions that, compared with the prior art, the fretting wear test method and device for simulating deep-sea corrosion environment of the present invention aims to solve the problem that the wear of key friction pairs of marine equipment is very serious due to the self-load under the marine corrosion environment and service conditions, and provides technical support for the research on ensuring the safety and reliability of marine equipment. At the same time, the present invention also has the following advantages: 1) The overall design concept of the present invention adheres to the principles of integration and modularization, the equipment structure is simple, easy to maintain in the later stage, and the installation and disassembly are very convenient; 2) The test sample fixture of the present invention can be set in different types and is easy to load and unload, and can meet the requirements of different pair contact forms (point contact - ball / plane pair, column / column pair; line contact - column / plane pair, tube / plate pair); 3) The fretting wear test module of the present invention can realize closed-loop precision motion control of position, and has high accuracy in collecting test data such as displacement, friction force and normal load, and can carry out tangential friction and wear experiments from micrometer level to millimeter level, which greatly makes up for the shortcomings of simple functions and backward indicators of existing fretting wear testers on the market; 4) The present invention can flexibly adjust environmental factors such as temperature and pressure according to test requirements, and reproduce the real deep-sea environment to the greatest extent. In addition, in-situ detection can ensure that samples are not affected by environmental pollution in subsequent characterization processing. The characterization results are infinitely close to the actual test results, meeting the quasi-in-situ characterization test requirements of the test samples. It is of great significance for the basic research on tangential micro-motion friction and wear simulation in deep-sea service environment and the protection research on micro-motion wear in actual engineering fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0017] Figure 1 It is a plan view of the overall structure of the fretting wear testing device for simulating deep-sea corrosion environment of the present invention; Figure 2 It is a planar structural diagram of the high-pressure test kettle and the micro-motion wear test module of the present invention.

[0018] Description of reference numerals: 1. External glove box; 2. High-pressure test kettle; 3. Fretting wear test module; 4. Vacuum gauge a; 5. Gloves and glove holes; 6. Booster pump; 7. Water chemical treatment circuit; 8. Gas flow meter; 9. Inert gas cylinder; 10. Liquid storage kettle; 11. Two-way water pump; 12. Test system base; 13. Vacuum pump group; 14. Sample transfer cabin; 15. Gate valve; 16. Vacuum gauge c; 201, kettle cover; 202, vacuum gauge b; 203, kettle cover lifting mechanism; 204, kettle body; 205, temperature control device; 206, thermal insulation layer; 301. Electromagnetic exciter; 302. Dynamic force sensor; 303. Linear guide; 304. Displacement sensor; 305. Guide rod; 306. Sample fixture I; 307. Sample fixture II; 308. Spring compensation mechanism; 309. Normal force loading device; 310. Test lever; 311. Friction force sensor; 312. Lever hinge. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of an exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In order to enable those skilled in the art to better understand the present application scheme, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the directions or positional relationships indicated by "left side", "right side", "top", "bottom", "outer wall", "inside", "longitudinal", "lateral", "clockwise", "counterclockwise" and so on in the following text are all based on the orientations or positional relationships shown in the accompanying drawings, and are 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 cannot be understood as a limitation to the present invention.

[0021] Please see attached Figure 1-2 , which is a micro-motion wear testing device for simulating deep-sea corrosion environment disclosed in the present invention.

[0022] like Figure 1 As shown, the fretting wear test device for simulating deep-sea corrosion environment provided by the present invention includes four main parts: an external glove box 1, a high-pressure test kettle 2, a liquid storage kettle 10 and a fretting wear experimental module 3.

[0023] The external glove box 1, the high-pressure test kettle 2 and the liquid storage kettle 10 are all built with the test system base 12 as the reference platform. The lower half of the high-pressure test kettle 2 and the liquid storage kettle 10 on the right are embedded in the platform of the test system base 12. Seawater is stored in the liquid storage kettle 10. The high-pressure test kettle 2 is divided into two parts: a kettle cover 201 and a kettle body 204. The micro-motion wear test module 3 is installed on the kettle cover 201 of the high-pressure test kettle 2. The external glove box 1 is installed on the platform of the test system base 12, covering the outside of the high-pressure test kettle 2 and the micro-motion wear test module 3.

[0024] like Figure 1-2 As shown, the bottom of the high-pressure test kettle body 204 is connected to the liquid storage kettle 10 on the right through a pipeline and a two-way water pump 11. The two-way water pump 11 can be turned on to transport the seawater stored in the liquid storage kettle 10 to the inside of the high-pressure test kettle 2. The temperature control device 205 is installed on the outer wall of the kettle body 204 embedded in the test system base 12 to provide the environmental temperature required for the test. The outer side of the temperature control device 205 is covered with a thermal insulation layer 206 to prevent the heat inside the high-pressure test kettle 2 from being lost or the heat from the surrounding environment from entering the high-pressure test kettle 2 to interfere with the test effect.

[0025] Furthermore, the booster pump 6 and the water chemical treatment circuit 7 are inserted into the test kettle 2 through the connection hole designed on the kettle cover 201 through the pipeline. In addition, a vacuum gauge b202 is also installed on the kettle cover 201. Through the booster pump 6 and the vacuum gauge b202, the internal air pressure of the test kettle 2 can be accurately controlled to reach the preset value of the test.

[0026] Furthermore, a lifting control mechanism 203 is installed at the upper ends of both sides of the kettle body 204, and the lifting control mechanism 203 can drive the kettle cover 201 and the micro-wear test module 3 installed thereon to achieve lifting and lowering together, which is convenient for the installation and removal of the sample. The kettle cover 201 and the lifting control mechanism 203 can be locked by screws, so that the kettle cover 201 and the kettle body 204 form a closed chamber, ensuring that the internal environment of the high-pressure test kettle 2, that is, the test simulation environment is not affected by external environmental factors, and the purpose of simulating the actual deep-sea service environment is achieved.

[0027] like Figure 2 As shown, the fretting wear test module 3 is mainly composed of an electromagnetic exciter 301, a linear guide rail 303, a guide rod 305, a sample fixture I and a sample fixture II 307, a spring compensation mechanism 308, a normal load loading device 309, a lever hinge 312 and a data acquisition unit.

[0028] The linear guide 303 is fixed to the right end of the upper side of the kettle cover 201, and its axis direction is perpendicular to the test system base 12 (and the kettle cover 201). The middle part of the guide rod 305 is fixed on the slide of the linear guide 303, and its upper end is located outside the high-pressure test kettle 2, connected to the output end of the electromagnetic exciter 301, and can be driven by the voice coil motor to perform longitudinal reciprocating motion. The linear guide 303 plays a supporting and guiding role in the movement of the guide rod 305.

[0029] Furthermore, the lower end of the guide rod 305 is located in the high pressure test kettle 2, and the sample fixture I 306 is fixed to the bottom of the guide rod 305 by screws. The test lever 310 is fixed to the middle of the lower side of the kettle cover 201, and the sample fixture II 307 is installed at the lower end of the lever 310. The upper end of the test lever 310 is equipped with a lever hinge 312, which can be rotated by the lever hinge 312 to drive the sample fixture II 307 to lift up to facilitate the loading and unloading of the sample.

[0030] Preferably, the present invention is equipped with various types of sample fixtures, which can adapt to samples of different shapes or sizes and can achieve point or line contact, including but not limited to ball / plane pairs, column / column pairs, column / plane pairs and tube / plate pairs.

[0031] Furthermore, a normal force loading device 309 is installed at the left end of the lower side of the kettle cover 201, and is designed with a spring compensation mechanism 308. The end of the normal force loading device 309 contacts the test lever 310, and a lateral force, i.e., a normal force relative to the moving direction of the guide rod 305, can be applied to the test lever 310 through the spring compensation mechanism 308 to provide the normal load required for the fretting wear test.

[0032] The data acquisition unit of the fretting wear test module 3 is connected to the host computer and is responsible for realizing the real-time online acquisition and feedback of various index parameters during the fretting wear test, so as to facilitate the subsequent analysis and processing.

[0033] Specifically, the data acquisition unit includes: a displacement sensor 304, a dynamic force sensor 302 and a friction sensor 311. The displacement sensor 304 is installed on the slider of the linear guide 303, and collects the change of the relative displacement of the grinding pair through the sliding distance of the slider to achieve position closed-loop precision motion control; the dynamic force sensor 302 is installed at the output end of the electromagnetic exciter 301, and is responsible for real-time feedback measurement and control compensation of the normal load during the test; the friction sensor 311 is installed at the upper end of the test lever 310, and is responsible for real-time measurement of the friction force generated by the relative tangential motion of the grinding pair during the test.

[0034] Preferably, the dynamic force sensor 302 and the friction force sensor 311 are both optical fiber force sensors that are resistant to high temperature and high pressure liquid environments, and the displacement sensor 304 is a high-precision grating displacement sensor.

[0035] like Figure 1 As shown, the right side connection port of the external glove box 1 is connected to the inert gas cylinder 9 through a pipeline, and a gas flow meter 8 is installed on the pipeline to monitor and feedback the gas flow rate in the pipeline in real time. The inert gas cylinder 9 is filled with inert gas Ar / N2. The lower left side of the external glove box 1 is connected to the vacuum pump group 13 through a pipeline, and a vacuum gauge a4 is installed on the top of the external glove box 1 to achieve precise control of the internal air pressure of the box.

[0036] The external glove box 1 is equipped with gloves and glove holes 5. Wearing the gloves and inserting them into the external glove box 1 through the glove holes to perform operations can avoid contamination of the test environment and samples and interference with the test results.

[0037] Furthermore, a sample transfer cabin 14 is designed on the upper left side of the external glove box 1, and vacuum plug valves 15 are installed on both sides. The left side of the sample transfer cabin 14 is connected to the external vacuum environment, the bottom is connected to the vacuum pump group 13 through a gas pipeline, and a vacuum gauge c16 is installed on the top, which can realize the precise control of the air pressure in the sample transfer cabin 14 to meet the requirements of quasi-in-situ characterization test of the sample.

[0038] In addition, the present invention provides a fretting wear test method for simulating a deep-sea corrosion environment, which is specifically as follows: 1) Before the test, the inert gas cylinder 9 is opened to introduce inert gas into the external glove box 1, and the air pressure inside the external glove box 1 is regulated by the vacuum pump group 13, and the vacuum gauge a4 is used to observe to ensure that the air pressure inside the external glove box 1 reaches the standard atmospheric pressure; 2) Control the lifting control mechanism 203 to drive the kettle cover 201 to rise, so that the kettle cover 201 drives the fretting wear test module 3 to rise to a certain height, rotate the lever hinge 312 clockwise to lift the test lever 310, install the sample fixture I 306 and the sample fixture II 307, and then install the grinding samples on the corresponding sample fixtures respectively. After the installation is completed, rotate the lever hinge 312 counterclockwise to make the grinding samples on the sample fixture I 306 and the sample fixture II 307 contact; 3) Lower the kettle cover 201 and the test module 3, and use screws to lock the kettle cover 201 and the lifting control mechanism 203, so that the kettle cover 201 and the kettle body 204 form a closed chamber, and start the two-way water pump 11 to transport the seawater stored in the liquid storage kettle 10 to the interior of the high-pressure test kettle 2; 4) Start the booster pump 6 and the water chemical treatment circuit 7, observe the reading of the vacuum gauge b202, and operate the temperature control device 205 to make the interior of the high-pressure test reactor 2 reach the preset pressure and temperature environment of the test; 5) Set the various parameters and indicators of the test in the system operation program of the host computer, and then start the micro-motion wear test; 6) After the test is completed, the two-way water pump 11 is turned on to release the pressure of the high-pressure test kettle 2, so that the seawater inside the high-pressure test kettle 2 flows back into the liquid storage kettle 10, and the kettle cover 201 and the fretting wear test module 3 are lifted by the lifting control mechanism 203, and the sample is removed from the sample fixture I 306 and the sample fixture II 307 and dried; 7) Open the gate valve 15 on the right side of the sample transfer cabin 14 to send the sample into the sample transfer cabin 14, then close the gate valve 15, start the vacuum pump group 13, observe the reading of the vacuum gauge c16, and when the vacuum degree inside the transfer cabin 14 is consistent with the vacuum degree of the external vacuum environment, open the gate valve 15 on the left side of the transfer cabin 14, and send the sample into the characterization test instrument under the protection of the external vacuum environment for subsequent characterization operations, and then close the gate valve 15 on the left side.

[0039] It should be noted that the operator should wear the gloves provided in the external glove box 1 and insert the gloves into the external glove box 1 through the glove hole 5 to perform the operation.

[0040] The above content shows and describes the general structure, main features, innovative points and detection methods of the present invention. The above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the present invention. Various modifications to these embodiments will be obvious to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown in this article, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. A fretting wear test device simulating a deep-sea corrosion environment, characterized in that: The invention comprises an external glove box (1), a high-pressure test kettle (2) and a liquid storage kettle (10), wherein the front side of the external glove box (1) is provided with gloves and glove holes (5), the right side is connected to an inert gas cylinder (9) via a pipeline, and the top is provided with a vacuum gauge a (4); the upper part of the left side surface of the external glove box (1) is provided with a sample transfer cabin (14), the lower part of the left side surface is connected to a vacuum pump group (13) via a gas pipeline, and the left and right sides of the sample transfer cabin (14) are installed with plug valves (15); the left side of the sample transfer cabin (14) is used to be connected to the external vacuum environment, the right side is connected to the inside of the external glove box (1), the bottom is connected to the vacuum pump group (13) via a gas pipeline, and the top is installed with a vacuum gauge c (16); The high-pressure test kettle (2) is arranged inside the external glove box (1), and the liquid storage kettle (10) is arranged outside the external glove box (1). The high-pressure test kettle (2) comprises a kettle body (204) and a kettle cover (201) installed at the top of the kettle body (204). The kettle body (204) and the kettle cover (201) form a closed chamber. The closed chamber is connected to a booster pump (6) and a water chemical treatment circuit (7) in sequence through a connecting hole on the kettle cover (201) through a pipeline. The kettle cover (201) is installed with a micro-motion wear test module (3) and a vacuum gauge b (202). The bottom of the kettle body (204) is connected to the liquid storage kettle (10) through a pipeline and a two-way water pump (11). The micro-motion wear test module (3) comprises a linear guide rail (303) and a guide rod (305); the linear guide rail (303) is fixedly arranged on the upper side of the kettle cover (201) along a direction in which the axis is perpendicular to the kettle cover (201); the guide rod (305) is installed on the linear guide rail (303) along a direction in which the axis is perpendicular to the kettle cover (201); the upper end of the guide rod (305) is located outside the high-pressure test kettle (2) and connected to the output end of the electromagnetic exciter (301); and the lower end of the guide rod (305) is located outside the high-pressure test kettle (2). A sample fixture I (306) is installed inside the kettle cover (201), a test lever (310) is provided on the lower side of the kettle cover (201), the upper end of the test lever (310) is hinged to the kettle cover (201) via a lever hinge (312), a sample fixture II (307) corresponding to the sample fixture I (306) is provided at the lower end of the test lever (310), and the test lever (310) is rotated via the lever hinge (312) to make the samples fixed on the sample fixture I (306) and the sample fixture II (307) come into contact; The fretting wear test module (3) also includes a data acquisition unit, which is connected to a host computer to achieve real-time acquisition and feedback of index parameters during the fretting wear test.

2. The fretting wear testing device for simulating deep-sea corrosion environment according to claim 1 is characterized in that: Lifting control mechanisms (203) are installed at the upper ends of both sides of the kettle body (204), and the kettle cover (201) and the micro-motion wear test module (3) installed on the kettle cover (201) are driven to rise and fall together by the lifting control mechanisms (203), and the kettle cover (201) and the lifting control mechanisms (203) are locked by screws.

3. The fretting wear testing device for simulating deep-sea corrosion environment according to claim 1 is characterized in that: A normal force loading device (309) is installed on the lower side of the kettle cover (201), and the end of the normal force loading device (309) contacts the lower end of the test lever (310). A spring compensation mechanism (308) is provided inside the normal force loading device (309). A lateral force is applied to the test lever (310) through the spring compensation mechanism (308), so that the test lever (310) generates a normal force relative to the movement direction of the guide rod (305).

4. The fretting wear testing device for simulating deep-sea corrosion environment according to claim 1, characterized in that: The data acquisition unit comprises a displacement sensor (304), a dynamic force sensor (302) and a friction force sensor (311); the displacement sensor (304) is mounted on a slider of a linear guide rail (303) to acquire changes in the relative displacement of the grinding pair through the sliding distance of the slider; the dynamic force sensor (302) is mounted on the output end of the electromagnetic exciter (301) to perform real-time feedback measurement and control compensation of the normal load of the guide rod (305) during the test; and the friction force sensor (311) is mounted on the upper end of the test lever (310) to measure in real time the magnitude of the friction force generated by the relative tangential movement of the grinding pair during the test.

5. The fretting wear testing device for simulating deep-sea corrosion environment according to claim 4 is characterized in that: The dynamic force sensor (302) and the friction force sensor (311) are both optical fiber force sensors, and the displacement sensor (304) is a grating displacement sensor.

6. The fretting wear testing device for simulating deep sea corrosion environment according to claim 1, characterized in that: The external glove box (1), the high-pressure test kettle (2) and the liquid storage kettle (10) are all installed on the test system base (12), and the lower half of the kettle body (204) and the liquid storage kettle (10) are both embedded in the test system base (12).

7. The fretting wear testing device for simulating deep-sea corrosion environment according to claim 1, characterized in that: A temperature control device (205) is installed on the outer side wall of the kettle body (204) embedded in the test system base (12), and the outer side of the temperature control device (205) is covered with a thermal insulation layer (206).

8. The fretting wear testing device for simulating deep sea corrosion environment according to claim 1, characterized in that: The electromagnetic exciter (301) is driven by a voice coil motor to drive the guide rod (305), the test fixture I (306) and the sample to perform longitudinal reciprocating motion.

9. The fretting wear testing device for simulating deep-sea corrosion environment according to claim 1, characterized in that: A gas flow meter (8) is installed on the pipeline connecting the external glove box (1) and the inert gas cylinder (9).

10. A fretting wear test method for simulating a deep-sea corrosion environment, applied to the fretting wear test device for simulating a deep-sea corrosion environment as claimed in any one of claims 1 to 9, characterized in that: include: 1) Before the test, the inert gas cylinder (9) is opened to introduce inert gas into the interior of the external glove box (1), and the air pressure inside the external glove box (1) is regulated by a vacuum pump assembly (13), and is observed by a vacuum gauge a (4) to ensure that the air pressure inside the external glove box (1) reaches the standard atmospheric pressure; 2) controlling the lifting control mechanism (203) to drive the kettle cover (201) to rise, so that the kettle cover (201) drives the micro-motion wear test module (3) to rise to a certain height, rotating the lever hinge (312) clockwise to lift the test lever (310), installing the sample fixture I (306) and the sample fixture II (307), and then installing the grinding samples on the corresponding sample fixtures respectively. After the installation is completed, rotating the lever hinge (312) counterclockwise to make the grinding samples on the sample fixture I (306) and the sample fixture II (307) come into contact; 3) lowering the kettle cover (201) and the test module (3), and locking the kettle cover (201) and the lifting control mechanism (203) with screws so that the kettle cover (201) and the kettle body (204) form a closed chamber, and starting the two-way water pump (11) to transport the seawater stored in the liquid storage kettle (10) to the interior of the high-pressure test kettle (2); 4) Start the booster pump (6) and the water chemical treatment circuit (7), observe the reading of the vacuum gauge b (202), and operate the temperature control device (205) to make the interior of the high-pressure test reactor (2) reach the pressure and temperature environment preset for the test; 5) Set the various parameters and indicators of the test in the system operation program of the host computer, and then start the micro-motion wear test; 6) After the test is completed, the two-way water pump (11) is turned on to release the pressure of the high-pressure test kettle (2), so that the seawater inside the high-pressure test kettle (2) flows back into the liquid storage kettle (10), and the kettle cover (201) and the micro-motion wear test module (3) are lifted by the lifting control mechanism (203), and the sample is removed from the sample fixture I (306) and the sample fixture II (307) and dried; 7) Open the plug valve (15) on the right side of the sample transfer cabin (14) to send the sample into the sample transfer cabin (14), then close the plug valve (15), start the vacuum pump group (13), observe the reading of the vacuum gauge c (16), and when the vacuum degree inside the transfer cabin (14) is consistent with the vacuum degree of the external vacuum environment, open the plug valve (15) on the left side of the transfer cabin (14), send the sample into the characterization test instrument under the protection of the external vacuum environment, perform subsequent characterization operations, and then close the plug valve (15) on the left side.

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