A friction and wear test system for ultra-high temperature water-oxygen environment

Abstract

The present invention discloses an ultra-high temperature water-oxygen environment friction and wear test system, which includes an oxygen source, an argon source, a steam generator, a friction and wear test device, a temperature control system, and a computer control system. This system simulates the high-temperature water-oxygen service environment of hot-end sliding components in aerospace equipment, and can be used for the friction and wear performance testing of materials in an ultra-high temperature (≥1400 °C) water-oxygen environment, as well as under a maximum load of 1000 N and a friction linear velocity of 0.02 - 100 mm / s. By obtaining the friction and wear behavior of materials under the multi-factor coupling action of a thermal-mechanical-friction-water-oxygen environment, the failure evolution law of material properties can be mastered, providing reliable data for the active design and practical application of materials. This test system is of great significance for driving the research and development of high-reliability and long-life high-temperature solid lubricating materials, and promoting the continuous development of lubrication technology and high-end equipment in China.

Description

Technical Field

[0001] The present invention relates to the technical field of ultra-high temperature friction performance testing, and particularly to a friction and wear testing system for an ultra-high temperature water-oxygen environment. Background Art

[0002] Friction and lubrication are common problems of mechanical moving parts. From space machinery to ground equipment, from micro machinery to aircraft carriers, as long as there is mechanical movement, friction and lubrication problems are involved. The reliability and stability of lubricating materials have become the key to ensuring the safe, efficient, and stable operation of high-end equipment mechanical systems. Among them, high-temperature solid lubricating materials are widely used in key hot-end components of core devices such as aviation engine bearings and their transmission systems, missile all-gas servo mechanisms, and rocket engine thrust chambers. With the development of new-generation equipment, the service temperature of some sliding parts has exceeded 1400 °C, and even up to 1600 °C or more, and the service environment involves multi-factor interaction environments such as water-oxygen atmosphere, high load, and high speed at the same time. The above harsh conditions put forward higher requirements for the performance of solid lubricating materials. It is reported that foreign units such as NASA in the United States and the National Academy of Sciences of Ukraine have developed new ultra-high temperature wear-resistant ceramic-based self-lubricating materials and have been applied on new-generation verification machines. However, the research on ultra-high temperature wear-resistant ceramic-based self-lubricating materials in China started relatively late, lacking systematic research and basic application data on such materials. The reason is that, in addition to the core technology and process of the materials, the lack of friction and wear testing equipment with the ability to simulate near-service conditions is the key to restricting the performance improvement and application of the materials. According to research, the operating temperature of high-temperature friction and wear test equipment publicly sold at home and abroad is about 1000 °C, and the limit temperature is lower than 1200 °C, and there is no water-oxygen atmosphere environment function, which seriously restricts the development and application of high-performance ceramic-based self-lubricating materials. Summary of the Invention

[0003] Based on the above, the purpose of the present invention is to provide a friction and wear testing system for an ultra-high temperature water-oxygen environment, which is used to investigate the service performance and degradation law of materials under the multi-factor coupling action of heat-force-friction-water-oxygen environment, and further provide basic data for the performance improvement and practical application of materials.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] An ultra-high temperature water-oxygen environment friction and wear testing system includes an oxygen source, an argon source, and a steam generation system. Among them, the outlets of the oxygen source, the argon source, and the steam generation system are all connected to the inlet of the gas distribution system; the testing system also includes a friction and wear testing device, a temperature control system, and a computer control system;

[0006] The friction and wear test equipment includes an instrument base plate. Above the instrument base plate, there is a Y-axis linear translation guide rail, which is driven by a handwheel. Above the Y-axis linear translation guide rail, there is a support seat, and above the support seat, there is a sample loading device. The sample loading device includes a base. On the base, there is a linear guide rail. On the linear guide rail, there is a slider. At the end of the slider, there is a friction force sensor. Above the slider, there is a mounting table. On the mounting table, there is a heat insulation block. At the top of the heat insulation block, there is a sample loading table. The top of the sample loading table extends into the heating furnace. Above the heating furnace, there is a friction loading device, and above the friction loading device, there is a load loading device.

[0007] The heating furnace includes a furnace chamber with an open top. On one side of the furnace chamber, there is a heating silicon carbide rod. In the middle of the furnace chamber, there is a water and oxygen environment chamber. The water and oxygen environment chamber includes a base plate. On the base, there are a water and oxygen mixed gas inlet and a sample loading table inlet. At the top of the base, there is a sealed isolation cover. At the top of the sealed isolation cover, there is a loading rod inlet. At the top of the furnace chamber, there is a heat preservation and insulation cover plate. The mixed gas outlet of the dynamic gas mixer is connected to the water and oxygen mixed gas inlet through a mixed gas pipe. A heating tape is provided on the outer periphery of the mixed gas pipe.

[0008] The friction loading device includes a reciprocating movement table, which reciprocates driven by the bottom X-axis reciprocating guide rail. The X-axis reciprocating guide rail is driven by a reciprocating movement motor. A loading rod is arranged through the middle of the reciprocating movement table. A loading rod sliding sleeve is arranged outside the loading rod. The part of the loading rod extending out of the loading rod sliding sleeve passes through the heat preservation and insulation cover plate and extends into the heating furnace and faces the sample loading table.

[0009] The load loading device includes a loading motor, which is connected to a lead screw through a coupling. At the bottom of the lead screw, there is an optical high-precision lifting table. On this optical high-precision lifting table, there is a loading slide rod. At the bottom of the loading slide rod, there is a load sensor. Above the load sensor on the loading slide rod, there is a limit linear guide rail. At the bottom of the load sensor, there is a loading pressure head. At the bottom of the loading pressure head, there is a roller, and the bottom of the roller extends out of the loading pressure head.

[0010] The temperature control system includes a first temperature controller and a second temperature controller. The first temperature controller is electrically connected to a first temperature sensor, and the first temperature sensor is arranged in the heating furnace and is used to detect and control the temperature in the heating furnace. The second temperature controller is electrically connected to a second temperature sensor, and the second temperature sensor is arranged at the air inlet of the mixed gas pipe and is used to control the preheating temperature of the mixed gas.

[0011] The computer control system is used for the human-machine interaction during the test process. Its output terminals are respectively electrically connected to the temperature control system, the loading motor, and the reciprocating movement motor. The input terminals of the computer control system are respectively electrically connected to the friction force sensor, the load sensor, and the driver of the reciprocating movement motor.

[0012] Preferably, as the technical solution of the present invention, the steam generation system is a steam generator, and the steam generator is connected to an injection pump; the dynamic gas distribution instrument includes an oxygen passage, an argon passage and a water vapor passage. The oxygen passage and the argon passage are communicated with a mixing tank through a mixing pipe, and the water vapor passage is directly communicated with the mixing tank. The mixing tank is provided with a mixed gas outlet and a purging gas outlet; filters, solenoid valves, flow controllers and check valves are sequentially arranged on the oxygen passage and the argon passage, and filters, solenoid valves and check valves are sequentially arranged on the water vapor passage.

[0013] A sliding sleeve is arranged outside the loading slide bar, and a loading spring is arranged at the top of the loading slide bar inside the sliding sleeve.

[0014] Furthermore, the lead screw is arranged on the mounting frame, and Z-axis linear guide rails are arranged at both ends between the lead screw mounting frame and the optical high-precision lifting table.

[0015] The mixed gas ventilation pipe includes a threaded joint, a positioning pipe and a dust-proof pipe. The threaded joint is communicated with the mixed gas outlet of the dynamic gas distribution instrument. The positioning pipe and the dust-proof pipe are communicated through a positioning interface. The top end of the dust-proof pipe is closed, and a side air outlet is arranged at the top. The dust-proof pipe is communicated with the water-oxygen mixed gas inlet through the side air outlet.

[0016] A sensor heat-insulating water jacket is arranged between the slider and the mounting table.

[0017] A guide rail heat-insulating water jacket is arranged at the bottom of the X-axis reciprocating guide rail.

[0018] Gantry back plates are arranged on both sides of the instrument bottom plate.

[0019] Support rib plates are arranged on the outer side of the gantry back plate.

[0020] Pressure reducing valves are arranged at the oxygen source, the argon source and the air outlet of the steam generation system.

[0021] The present invention has the following beneficial effects:

[0022] 1. The test system of the present invention simulates the high-temperature water-oxygen service environment of the hot-end sliding components in aerospace equipment, and can be used for the test of the friction and wear performance of materials in a super-high temperature (≥1400 °C) water-oxygen environment, as well as under a maximum load of 1000 N and a friction linear velocity of 0.02 - 100 mm / s. By obtaining the friction and wear behavior of materials under the multi-factor coupling action of the thermal-force-friction-water-oxygen environment, the failure evolution law of material properties can be mastered, providing reliable data for the active design and practical application of materials. This test system is of great significance for the research and development of high-reliability and long-life high-temperature solid lubricating materials, and for promoting the continuous development of lubrication technology and high-end equipment in China.

[0023] 2. In the test system of the present invention, the steam generation system is connected to an injection pump. By controlling the water flow rate in the injection pump, the amount of water vapor entering the dynamic gas mixer is controlled, thus solving the problem of inaccurate water vapor ratio existing in the existing dynamic gas mixer when controlling the water vapor ratio through a flow controller at the source. By purging the water vapor passage and the mixing tank with water vapor, the residual liquid, impurities, etc. in the pipeline can be removed, making the volume of the introduced water vapor more accurate.

[0024] 3. In the existing load loading device, the loading slide bar and the loading rod are in rigid contact, which makes the contact between the loading rod and the sample stage also rigid contact, easily damaging the sample stage. In the present invention, through the setting of a sliding sleeve and a loading spring, the contact mode between the loading rod and the sample stage is converted into elastic contact, which can improve the accuracy of the load force applied to the test sample, reduce the requirement for the surface roughness of the test material, and reduce the sample test cost.

[0025] 4. In the present invention, a Z-axis linear guide rail is arranged between the lead screw mounting bracket and the optical high-precision lifting table in the load loading device, which can limit the movement trajectory of the loading slide bar, ensure that the load of the friction force loading rod by the loading slide bar is vertically downward, and guarantee the accuracy of the loading force.

[0026] 5. In the present invention, the end of the mixed gas vent pipe entering the heating furnace hearth is set to a structure with a closed top and an opening on the side of the top, which can prevent dust in the hearth from entering the vent pipe, causing blockage of the vent pipe and affecting the construction of the water-oxygen environment in the furnace.

[0027] 6. The friction force sensor and the X-axis reciprocating guide rail in the present invention are high-temperature-intolerant components. By setting heat-insulating water jackets on the friction force sensor and at the bottom of the X-axis reciprocating guide rail, the normal operation and safety performance of the friction force sensor and the X-axis reciprocating guide rail can be guaranteed.

[0028] 7. The existing friction loading device reciprocates in the Y-axis direction. The components of this device are scattered and large in volume, resulting in a large floor area for the entire test equipment. In the present invention, setting the friction loading device to reciprocate in the X-axis direction can reduce the floor area of the equipment. Brief Description of the Drawings

[0029] Figure 1 is the principle block diagram of the test system of the present invention;

[0030] Figure 2 is the front view of the friction and wear test equipment of the test system of the present invention;

[0031] Figure 3 is Figure 2 the left view of

[0032] Figure 4 is the structural schematic diagram of the heating furnace of the test system of the present invention;

[0033] Figure 5 It is a schematic structural diagram of the sample loading device of the test system of the present invention;

[0034] Figure 6 It is a schematic structural diagram of the mixed gas ventilation pipe of the test system of the present invention;

[0035] Figure 7 It is a schematic diagram of the principle of the dynamic gas mixer of the test system of the present invention;

[0036] Reference numerals: 1. Instrument base plate; 2. Support rib plate; 3. Friction force sensor; 4. Sensor heat insulation jacket; 5. Gantry back plate; 6. Heating furnace: 6-1. Furnace chamber, 6-2. Heating silicon carbide rod, 6-3. Sealed isolation cover, 6-4. Base plate, 6-5. Water-oxygen mixed gas inlet, 6-6. Sample loading table inlet, 6-7. Loading rod inlet, 6-8. Heat preservation and insulation cover plate; 7. Guide rail heat insulation jacket; 8. X-axis reciprocating guide rail; 9. Reciprocating motion table; 10. Loading indenter; 11. Limit linear guide rail; 12. Loading slide bar; 13. Slide sleeve; 14. Lead screw; 15. Z-axis linear guide rail; 16. Coupling; 17. Loading motor; 18. Hand wheel; 19. Y-axis linear translation guide rail; 20. Mixed gas ventilation pipe; 21. Water-oxygen holding chamber; 22. Sample loading table; 23. Heating silicon carbide rod; 24. Loading rod; 25. Loading rod slide sleeve; 26. Roller; 27. Loading spring; 28. Reciprocating motion motor; 29. Support seat; 30. Base; 31. Linear guide rail; 32. Slide block; 33. Installation table; 34. Heat insulation block; 35. Optical high-precision lifting table; 36. Load sensor; 37. Installation frame; 38. Side air outlet; 39. Positioning pipe; 40. Threaded joint; 41. Positioning interface; 42. Dust-proof pipe. Specific embodiments

[0037] The structure and working process of the ultra-high temperature water-oxygen environment friction and wear test system of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] Refer to Figure 1, a ultra-high temperature water-oxygen environment friction and wear test system provided by the present invention includes an oxygen source, an argon source, a steam generator, a friction and wear test device, a temperature control system and a computer control system. Among them, the water inlet of the steam generator is connected to an injection pump, and the outlets of the oxygen source, the argon source and the steam generator are all connected to a dynamic gas mixer. Pressure reducing valves are provided at the outlets of the oxygen source, the argon source and the steam generation system. The temperature control system includes a first temperature controller and a second temperature controller. The first temperature controller is electrically connected to a first temperature sensor (not shown in the figure), and the first temperature sensor is disposed in the heating furnace 6 for detecting and controlling the temperature inside the heating furnace. Heat insulation water jackets serving as water cooling devices are provided on both sides of the heating furnace 6. The second temperature controller is electrically connected to a second temperature sensor (not shown in the figure), and the second temperature sensor is disposed at the inlet of the mixed gas ventilation pipe 20 for controlling the preheating temperature of the mixed gas. The computer control system is used for the human-machine interaction during the test process, and its output terminals are respectively electrically connected to the first temperature controller, the second temperature controller, the loading motor 17 and the reciprocating motion motor 28. The input terminals of the computer control system are respectively electrically connected to the friction force sensor 3, the load sensor 36 and the driver of the reciprocating motion motor 28. The mixed gas ventilation pipe passes through the water-oxygen environment sealing and isolating cover to reach the sample stage. The loading motor 17 is electrically connected to the load sensor, and the loading motor 17 applies a load to the loading rod 24. The reciprocating motion motor 28 drives the reciprocating motion stage 9 to drive the loading rod 24 to reciprocate, applying a frictional force to the sample stage 22.

[0039] Referring to Figures 2-6 , the friction and wear test device includes an instrument base plate 1. Support ribs 2 are provided on the outer sides of both sides of the instrument base plate 1. A Y-axis linear translation guide rail 19 is provided above the instrument base plate, and the Y-axis linear translation guide rail 19 is driven by a handwheel 18; a support seat 29 is provided above the Y-axis linear translation guide rail 19, and a sample loading device is provided above the support seat 29; the sample loading device includes a base 30, a linear guide rail 31 is provided on the base 30, a slider 32 is provided on the linear guide rail 31, a friction force sensor 3 is provided at the end of the slider 32, a sensor heat insulation water jacket 4 is provided above the slider 32, a mounting table 33 is provided on the sensor heat insulation water jacket 4, a heat insulation block 34 is provided on the mounting table 33, a sample stage 22 is provided on the top of the heat insulation block 34, the top of the sample stage 22 extends into the heating furnace 6, a friction loading device is provided above the heating furnace 6, and a load loading device is provided above the friction loading device.

[0040] The heating furnace 6 includes a furnace chamber 6-1 with an open top. One side of the furnace chamber 6-1 is provided with heating silicon carbide rods 6-2. In the middle of the furnace chamber 6-1, there is a water-oxygen environment chamber, which includes a bottom plate 6-4. On the bottom plate 6-4, there are a water-oxygen mixed gas inlet 6-5 and a sample stage inlet 6-6. On the top of the bottom plate 6-4, there is a sealed isolation cover 6-3. On the top of the sealed isolation cover 6-3, there is a loading rod inlet 6-7. On the top of the furnace chamber 6-1, there is a heat-insulating cover plate 6-8. The mixed gas outlet of the dynamic gas mixer is communicated with the water-oxygen mixed gas inlet 6-5 through a mixed gas pipe 20. A heating tape (prior art, not shown in the figure) is provided on the outer periphery of the mixed gas pipe 20.

[0041] The friction loading device includes a reciprocating stage 9, which reciprocates driven by an X-axis reciprocating guide rail 8 at its bottom. The X-axis reciprocating guide rail 8 is driven by a reciprocating motor 28. A loading rod 24 is disposed through the middle of the reciprocating stage 9. An outer sleeve 25 of the loading rod is provided outside the loading rod 24. The part of the loading rod 25 extending out of the outer sleeve 25 passes through the heat-insulating cover plate 6-8 and extends into the heating furnace 6 and faces the sample stage 22.

[0042] The load loading device includes a loading motor 17, which is connected to a lead screw 14 through a coupling 16. The lead screw 14 is disposed on a mounting frame 37. At the bottom of the lead screw 14, there is an optically high-precision lifting stage 35. At both ends between the mounting frame 37 and the optically high-precision lifting stage 35, there are Z-axis linear guide rails 15. A loading slide bar 12 is provided on the optically high-precision lifting stage 35. An outer sleeve 13 is provided outside the loading slide bar 12. A loading spring 27 is provided at the top of the loading slide bar 12 inside the outer sleeve 13. A load sensor 36 is provided at the bottom of the loading slide bar 12. A limit linear guide rail 11 is provided above the load sensor 36 on the loading slide bar 12. A loading press head 10 is provided at the bottom of the load sensor 36. A roller 26 is provided at the bottom of the loading press head 10, and the bottom of the roller 26 extends out of the loading press head 10.

[0043] Refer to Figure 1 、 Figure 7 In reference to

[0044] Refer to Figure 7, the gas mixture pipe 20 includes a threaded joint 40, a square positioning pipe 39, and a dust-proof pipe 42. The threaded joint 40 communicates with the gas mixture outlet of the dynamic gas distributor. The positioning pipe 39 and the dust-proof pipe 42 communicate with each other through a positioning interface 41. The top of the dust-proof pipe 42 is closed, and a side air outlet 38 is provided at the top. The dust-proof pipe 42 communicates with the water-oxygen gas mixture inlet 6-5 through the side air outlet 38.

[0045] In the water-oxygen environment of the present invention, by volume fraction, it contains 83% argon, 12% water vapor, and 5% oxygen. During the test, it is necessary to control the flow rates of the flow controllers in the oxygen passage and the argon passage respectively according to actual needs, so as to control the volumes of oxygen and argon entering the mixing tank. The volume of water vapor entering the mixing tank is controlled by controlling the flow rate of water in the syringe pump. For example, to generate 50 ml of water vapor, it is necessary to control the flow rate of water in the syringe pump to be 40 μl / min.

[0046] The computer control system of the present invention is a PLC programmable controller.

[0047] When using the test system of the present invention to test the friction and wear performance of materials, first start the syringe pump, steam generator, and dynamic gas distributor, keep the oxygen passage and the argon passage in the closed state, open the water vapor passage and the purge gas outlet, and introduce water vapor to purge the residual liquid and impurities in the water vapor passage and the mixing tank. After the purging is completed, close the purge gas outlet. At the same time, open the oxygen passage, the argon passage, and the water vapor passage, and adjust the volumes of argon, water vapor, and oxygen entering the mixing tank by the above method. After the argon, water vapor, and oxygen are mixed evenly in the mixing tank, they are discharged from the gas mixture outlet and enter the gas mixture pipe 20. In order to prevent the mixed gas introduced into the water-oxygen holding chamber from exploding due to excessive temperature difference, a heating tape (prior art, not shown in the figure) is provided on the outer periphery of the gas mixture pipe 20 to preheat the mixed gas. Then, place the sample to be tested on the sample stage 22, start the PLC programmable controller, preset the preheating temperature of the mixed gas and the temperature inside the heating furnace. The PLC programmable controller transmits the preheating temperature command of the mixed gas to the second temperature controller, and transmits the temperature command inside the heating furnace to the first temperature controller. The second temperature controller and the second temperature sensor adjust the preheating temperature of the mixed gas to the preset temperature, and the first temperature controller and the first temperature sensor adjust the temperature inside the heating furnace to the preset temperature. The mixed gas preheated to the preset temperature enters the ultra-high temperature sealed isolation cover 6-3 through the side air outlet 38 of the dust-proof pipe 42, forming an ultra-high temperature water-oxygen environment with a temperature ≥ 1400 °C, containing 83% argon, 12% water vapor, and 5% oxygen.

[0048] Subsequently, the loading force, friction linear velocity, and friction force are preset through the PLC programmable controller. At the same time, the loading motor 17 is started. The loading motor 17 drives the lead screw 14 to act through the coupling 16. The lead screw 14 drives the loading slide bar 12 to move downward through the optical high-precision lifting table 35. The loading slide bar 12 drives the loading indenter 10 to move downward under the limiting action of the limiting linear guide rail 11 until the roller 26 in the loading indenter 10 contacts the upper end of the loading rod 24, applying a loading force to the loading rod 24. The actual magnitude of the loading force is detected by the load sensor 36 and fed back to the PLC programmable controller, and finally the actual magnitude of the loading force is adjusted to the preset value. Finally, the reciprocating motion motor 28 is started to drive the reciprocating motion table 9 to reciprocate in the X-axis direction. The reciprocating motion table 9 drives the loading rod 24 to move along the X-axis reciprocating guide rail 8, applying a friction force to the sample to be tested. The actual magnitude of the friction linear velocity is detected by the driver of the reciprocating motion motor 19 and fed back to the PLC programmable controller, and finally the actual magnitude of the friction linear velocity is adjusted to the preset value. The friction force during the test is detected by the friction force sensor 3 and fed back to the PLC programmable controller, and finally the actual magnitude of the friction force is adjusted to the preset value. Thus, the test officially begins to detect the friction and wear performance of the sample to be tested in an ultra-high temperature water-oxygen environment, as well as under a maximum loading of 1000 N, a friction linear velocity of 0.02 - 100 mm / s, and a friction force of 0.1 - 500 N.

[0049] During the test, the position of the sample to be tested in the Y-axis direction can also be adjusted by driving the Y-axis linear translation guide rail 19 through the handwheel 18 to ensure good contact between the loading rod 24 and the sample to be tested. The friction force test accuracy of this test system is ±1%FS, and the reciprocating sliding range is 20 mm.

Claims

1. A friction and wear test system for ultra-high temperature water-oxygen environment, comprising an oxygen source, an argon source, and a steam generation system, characterized in that, The oxygen source, argon source, and the outlet of the steam generation system are all connected to the inlet of the gas distribution system; the test system further includes a friction and wear test device, a temperature control system, and a computer control system; The friction and wear test device includes an instrument base plate (1). Above the instrument base plate (1), there is a Y-axis linear translation guide rail (19), which is driven by a handwheel (18); above the Y-axis linear translation guide rail (19), there is a support seat (29), and above the support seat (29), there is a sample loading device; the sample loading device includes a base (30), on the base (30), there is a linear guide rail (31), on the linear guide rail (31), there is a slider (32), at the end of the slider (32), there is a friction force sensor (3), above the slider (32), there is a mounting table (33), on the mounting table (33), there is a heat insulation block (34), at the top of the heat insulation block (34), there is a sample loading table (22), the top of the sample loading table (22) extends into the heating furnace (6), above the heating furnace (6), there is a friction loading device, and above the friction loading device, there is a load loading device; The heating furnace (6) includes a furnace chamber (6-1) with an open top. On one side of the furnace chamber (6-1), there is a heating silicon carbide rod (6-2). In the middle of the furnace chamber (6-1), there is a water and oxygen environment chamber, which includes a bottom plate (6-4). On the bottom plate (6-4), there are a water and oxygen mixed gas inlet (6-5) and a sample loading table inlet (6-6). At the top of the bottom plate (6-4), there is a sealed isolation cover (6-3). At the top of the sealed isolation cover (6-3), there is a loading rod inlet (6-7). At the top of the furnace chamber (6-1), there is a heat preservation and heat insulation cover plate (6-8); the mixed gas outlet of the dynamic gas distributor is connected to the water and oxygen mixed gas inlet (6-5) through a mixed gas pipe (20), and a heating belt is arranged on the outer periphery of the mixed gas pipe (20); The mixed gas pipe (20) includes a threaded joint (40), a positioning pipe (39), and a dust-proof pipe (42). The threaded joint (40) communicates with the mixed gas outlet of the dynamic gas distributor. The positioning pipe (39) and the dust-proof pipe (42) communicate with each other through a positioning interface (41). The top end of the dust-proof pipe (42) is closed, and there is a side air outlet (38) at the top. The dust-proof pipe (42) is connected to the water and oxygen mixed gas inlet (6-5) through this side air outlet (38); The friction loading device includes a reciprocating motion table (9), which reciprocates under the drive of a bottom X-axis reciprocating guide rail (8). The X-axis reciprocating guide rail (8) is driven by a reciprocating motion motor (28). A loading rod (24) passes through the X-axis reciprocating guide rail (8) at the bottom of the reciprocating motion table (9). An outer part of the loading rod (24) is provided with a loading rod sliding sleeve (25). The part of the loading rod (24) extending out of the loading rod sliding sleeve (25) passes through the heat preservation and heat insulation cover plate (6-8) and extends into the heating furnace (6) and is opposite to the sample loading table (22); The load loading device includes a loading motor (17). The loading motor (17) is connected to a lead screw (14) through a coupling (16). At the bottom of the lead screw (14), there is an optically high-precision lifting table (35). On this optically high-precision lifting table (35), there is a loading slide bar (12). At the bottom of the loading slide bar (12), there is a load sensor (36). Above the load sensor (36) on the loading slide bar (12), there is a limit linear guide (11). At the bottom of the load sensor (36), there is a loading indenter (10). At the bottom of the loading indenter (10), there is a roller (26), and the bottom of the roller (26) extends out of the loading indenter (10). The steam generation system is a steam generator, and the steam generator is connected to an injection pump; the gas distribution system is a dynamic gas distributor, which includes an oxygen passage, an argon passage, and a water vapor passage. The oxygen passage and the argon passage are connected to a mixing tank through a mixing pipe, and the water vapor passage is directly connected to the mixing tank. The mixing tank is provided with a mixed gas outlet and a purging gas outlet; on the oxygen passage and the argon passage, there are successively arranged a filter, a solenoid valve, a flow controller, and a check valve, and on the water vapor passage, there are successively arranged a filter, a solenoid valve, and a check valve. The temperature control system includes a first temperature controller and a second temperature controller. The first temperature controller is electrically connected to a first temperature sensor, and the first temperature sensor is arranged inside a heating furnace (6) for detecting and controlling the temperature inside the heating furnace. The second temperature controller is electrically connected to a second temperature sensor, and the second temperature sensor is arranged at the air inlet of a mixed gas vent pipe (20) for controlling the preheating temperature of the mixed gas. The computer control system is used for the man-machine interaction during the test process. Its output terminals are respectively electrically connected to the temperature control system, the loading motor (17), and the reciprocating motion motor (28). The input terminals of the computer control system are respectively electrically connected to a friction sensor (3), a load sensor (36), and the driver of the reciprocating motion motor (28). A sensor heat insulation water jacket (4) is arranged on the friction sensor (3); a guide rail heat insulation water jacket (7) is arranged at the bottom of the X-axis reciprocating guide rail (8).

2. The ultra-high temperature water-oxygen environment friction and wear test system according to claim 1, wherein A sliding sleeve (13) is arranged outside the loading slide bar (12), and a loading spring (27) is arranged at the top of the loading slide bar (12) inside the sliding sleeve (13).

3. A super-high temperature water-oxygen environment friction and wear test system according to claim 2, characterized in that, The lead screw (14) is arranged on a mounting frame (37), and Z-axis linear guides (15) are arranged at both ends between the mounting frame (37) and the optically high-precision lifting table (35).

4. A super-high temperature water-oxygen environment friction and wear test system according to claim 1 or 3, characterized in that, Both sides of the instrument base plate (1) are provided with gantry back plates (5).

5. The ultra-high temperature water-oxygen environment friction and wear test system according to claim 4, characterized in that Support rib plates (2) are arranged outside the gantry back plates (5).

6. The ultra-high temperature water-oxygen environment friction and wear test system according to claim 1 or 3, characterized in that Pressure reducing valves are arranged at the outlets of the oxygen source, the argon source, and the steam generation system.

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