A high-temperature vacuum molten salt flow environment high-speed rotating friction and wear test system

Abstract

The utility model discloses a high temperature vacuum molten salt flow environment high -speed rotation friction and abrasion test system, including rotation friction and abrasion test system and computer control system. The utility model discloses design molten salt environment chamber is cylindrical, through molecular pump pumping, and molten salt environment chamber outer periphery sets up molten salt injection entrance and molten salt extraction respectively, and will molten salt environment chamber lower part be in high temperature heating furnace, realizes the flow of molten salt in molten salt environment chamber through molten salt pump, simultaneously, through setting molten salt environment chamber elevating system, can adjust molten salt environment chamber height, ensure that the high -speed rotation movement under the measured pair of grinding test sample can be completely immersed in molten salt environment. The utility model discloses design structure design exquisite, can be used to investigate the friction and abrasion performance of the material of moving part under the coupling of high temperature - high - speed - vacuum - force - molten salt environment, thereby providing good experimental support to the research and development of the material used under molten salt flow environment.

Description

Technical Field

[0001] This utility model relates to the field of friction and wear performance testing technology for materials, and in particular to a high-temperature vacuum molten salt flow environment high-speed rotating friction and wear testing system. Background Technology

[0002] Molten salt reactors, as one of the candidates for fourth-generation nuclear power, have attracted widespread attention from various countries in recent years due to their high safety, low nuclear waste, and high comprehensive utilization rate. However, molten salt is highly corrosive to metals, dissolving the oxide film formed on the metal surface. Moreover, the operating environment of molten salt reactors is generally a vacuum low-pressure environment above 600°C. Such a harsh operating environment leads to very high requirements for the materials used in molten salt flow, such as molten salt pumps, molten salt flow pipelines, and energy storage tanks. The molten salt flow environment in particular exacerbates the friction and wear of materials in moving parts.

[0003] To simulate and test the corrosion and friction wear properties of materials in a molten salt environment, and to promote the development of structural materials for molten salt reactors, Chinese utility model patent CN 114459935 A discloses a high-temperature vacuum molten salt environment rotating friction wear testing system. In this system, the molten salt is placed in a storage tank, and the sample to be tested is also placed in the storage tank. During friction wear testing, the storage tank rotates along with the sample pan. As the rotation speed increases, centrifugal force causes the molten salt to splash around the storage tank, resulting in no molten salt flow participating in the friction test on the sample test surface. This limits the ability to perform corrosion friction tests at low speeds, failing to accurately reflect the high-speed friction wear performance of materials under molten salt flow. Furthermore, in the aforementioned testing system, the molten salt becomes a molten liquid when placed in a high-temperature (temperature > 600℃) vacuum testing environment. When the sample is removed after testing, it must be cooled; however, as the temperature decreases, the molten salt in the sample tank freezes into plate-like crystals, making it impossible to remove the sample. Therefore, it is essential to design a friction wear testing system capable of high-speed operation in a molten salt flow environment through structural improvements. Utility Model Content

[0004] Based on the above, the purpose of this utility model is to provide a high-temperature vacuum molten salt flow environment high-speed rotational friction and wear testing system, which is used to examine the friction and wear performance of moving parts materials under the coupling of multiple factors such as high temperature, high speed, vacuum, force and molten salt environment, so as to provide experimental support for the research and development of materials used in molten salt flow environment.

[0005] To achieve its purpose, this utility model adopts the following technical solution:

[0006] A high-temperature vacuum molten salt flow environment high-speed rotating friction and wear testing system includes a rotating friction and wear testing system and a computer control system;

[0007] The rotary friction and wear testing system includes a main unit base plate, a main unit support platform horizontally arranged above the main unit base plate, and a cylindrical molten salt environment chamber between the main unit base plate and the main unit support platform.

[0008] The lower part of the molten salt environment chamber is placed inside the high-temperature heating furnace and is integrally formed with the high-temperature heating furnace. It is driven to lift by the environment chamber lifting mechanism. The top opening of the molten salt environment chamber is provided with a sealing cover. A vacuum extraction port and a temperature sensor are installed through the sealing cover. A pressure gauge is provided at the vacuum extraction port. Molten salt injection port and molten salt extraction port are respectively provided on both sides of the molten salt environment chamber between the sealing cover and the top surface of the high-temperature heating furnace.

[0009] The center of the sealing cover is provided with a rotating main shaft through a rotating magnetic fluid seal. The bottom of the rotating main shaft is provided with an upper sample fixing plate, and the bottom of the upper sample fixing plate is fixed to the upper sample plate. On both sides of the rotating main shaft, load guide rods are symmetrically arranged, passing through the main support platform and the sealing cover from top to bottom and extending to the bottom of the molten salt environment chamber. The end of the load guide rod extending into the bottom of the molten salt environment chamber is provided with a lower sample fixing seat, and a plate sample or a pin sample is installed on the lower sample fixing seat.

[0010] A dynamic torque sensor is installed on the upper part of the rotating spindle. The top of the load guide rod is fixed by a linear guide rail installed on the top surface of the main support platform. A loading mechanism support platform is installed on the top of the linear guide rail. An inverted rotary drive motor is also installed on the top surface of the main support platform. Synchronous pulleys are installed on the top of both the rotating spindle and the rotary drive motor. The two synchronous pulleys achieve power transmission through a synchronous belt. A gantry frame is installed on the main support platform between the tops of the two synchronous pulleys. An electric lifting platform is installed on the top of the gantry frame. A loading rod is installed at the bottom of the electric lifting platform. A tension / compression sensor is screwed to the bottom of the loading rod. The tension / compression sensor is connected to the top surface of the loading mechanism support platform through a sensor connector.

[0011] The computer control system is used for human-computer interaction during the testing process. Its signal output terminals are electrically connected to the rotary drive motor, the electric lifting mechanism, and the molten salt environment chamber lifting mechanism, respectively. The signal input terminals of the computer control system are electrically connected to the tension and compression sensor, the dynamic torque sensor, the temperature sensor, and the pressure gauge.

[0012] As a further improvement to the technical solution of this utility model, the environmental chamber lifting mechanism includes a stepper motor. The stepper motor shaft passes through the motor mounting plate and is connected to the lead screw via a coupling. Limiting slide rods are provided on the bottom surfaces of both sides of the motor mounting plate. The limiting slide rods pass through the lifting slider and are fixed to the base plate. A lifting vertical plate is installed on the lifting slider. A high-temperature furnace mounting platform is horizontally fixed on both sides of the vertical plate via triangular ribs. The high-temperature heating furnace is installed on the high-temperature furnace mounting platform. During testing, the lifting vertical plate is locked by the locking bolts on the side of the lifting slider to ensure the stability of the testing platform.

[0013] Furthermore, a support platform with a diameter larger than that of the molten salt environment chamber is provided near the top opening on the outer circumference of the molten salt environment chamber. This platform is connected to the top surface of the high-temperature heating furnace.

[0014] Furthermore, a loading spring is provided on the outer periphery of the top of the loading rod, and a loading spring box is provided on the outer periphery of the loading spring. The loading rod passes through the bottom of the loading spring box and is screwed to a tension / compression sensor.

[0015] Furthermore, an extension platform is provided on the load guide rod near the bottom surface of the main support platform, and a shock-absorbing spring is provided between the extension platform and the bottom surface of the main support platform.

[0016] Furthermore, the load guide rod is located on the outer periphery of the portion above the sealing cover and is connected to the extended flange platform via a corrugated sealing pipe, with the bottom of the corrugated sealing pipe connected to the top of the sealing cover.

[0017] Furthermore, a heat tracing cable is provided around the outer periphery of the pipes for the molten salt injection port and the molten salt extraction port.

[0018] Furthermore, the host support platform is horizontally installed above the host base plate via support columns.

[0019] Furthermore, the rotating magnetohydrodynamic seal has a water-cooling port on its outer periphery.

[0020] Furthermore, the rotating spindle is supported by a spindle mounting bearing seat mounted on the top surface of the host support platform.

[0021] The beneficial effects of this utility model are as follows:

[0022] 1. This invention features a cylindrical molten salt environment chamber. A molecular pump is used to create a vacuum. Molten salt inlet and outlet are located on the outer periphery of the chamber. The lower part of the chamber is placed in a high-temperature furnace, and the flow of molten salt within the chamber is achieved via a molten salt pump. Simultaneously, a lifting mechanism for the molten salt environment chamber allows for adjustment of its height, ensuring that the test sample is completely immersed in the molten salt environment during high-speed rotation. This invention boasts a sophisticated design and can be used to investigate the friction and wear performance of moving parts under the coupled conditions of high temperature, high speed, vacuum, force, and molten salt environment, thus providing excellent experimental support for the research and development of materials used in molten salt flow environments.

[0023] 2. The present invention provides a support platform at the outer circle of the molten salt environment chamber near the top opening, which is connected to the load-bearing metal shell on the top surface of the high-temperature heating furnace and has a diameter larger than that of the molten salt environment chamber. This platform can prevent damage to the furnace insulation layer due to the weight of the environment chamber itself and vibration.

[0024] 3. The present invention provides a heat tracing cable around the outer periphery of the pipes at the molten salt inlet and the molten salt outlet, which can prevent the molten salt flow from freezing and blocking the pipes due to low pipe temperature.

[0025] 4. The present invention provides an extended platform on the load guide rod near the bottom surface of the host support platform, and a shock-absorbing spring is provided between the extended platform and the bottom surface of the host support platform to ensure that the loaded load remains stable.

[0026] 5. In this utility model, a loading spring is installed on the outer periphery of the top of the loading rod, and a loading spring box is installed on the outer periphery of the loading spring. The loading rod passes through the bottom of the loading spring box and is screwed with a tension / compression sensor, which can realize elastic loading and avoid damage to the loading mechanism caused by rigid loading. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the rotary friction and wear testing system of this utility model;

[0028] Figure 2 This is a cross-sectional view of the rotary friction and wear testing system of this utility model;

[0029] Figure 3 for Figure 2 A magnified view of part A in the middle;

[0030] Figure 4 This is a schematic diagram of the sample mounting mechanism of this utility model;

[0031] Figure 5 This is a schematic diagram of the lifting mechanism of the molten salt environment chamber in this utility model;

[0032] Figure 6 This is a schematic diagram of the structure of the lower sample holder in this utility model;

[0033] 1. Rotary drive motor; 2. Electric lifting platform; 3. Loading spring box; 4. Loading rod; 5. Tension / compression sensor; 6. Sensor connector; 7. Main shaft mounting bearing seat; 8. Linear guide rail; 9. Support platform; 10. Dynamic torque sensor; 11. High-temperature heating furnace; 12. Support column; 13. Main unit base plate; 14. Fuma wheel; 15. Heating cable; 16. Molten salt environment chamber lifting mechanism; 17. Shock-absorbing spring; 18. Rotary magnetohydrodynamic seal; 19. Water cooling port; 20. Corrugated sealing pipe; 21. Loading spring; 22. Temperature sensor; 23. Molten salt injection port; 24. Sample mounting mechanism: 24-1. Upper sample fixing plate; 24-2. Upper sample plate; 24-3. Lower sample fixing seat; 24-4. Plate sample; 24-5. Pin sample; 25. Heating wire; 26. Molten salt extraction port; 27. Vacuum extraction port; 28. Load guide rod; 29. ​​Molten salt environment chamber; 30. Rotary spindle; 31. Sensor mounting plate; 32. Synchronous pulley; 33. Sealing cover; 34. Loading mechanism support platform; 35. Synchronous belt; 36. Gantry frame; 37. Support platform; 38. Extension platform; 39. Extension flange platform; 40. Stepper motor; 41. Coupling; 42. Lead screw; 43. Limiting slide bar; 44. Lifting slider; 45. Lifting vertical plate; 46. Triangular rib plate; 47. High-temperature furnace mounting platform; 48. Locking bolt; 49. Motor mounting plate. Detailed Implementation

[0034] The structure and working process of the high-temperature vacuum molten salt flow environment high-speed rotating friction and wear testing system of this utility model will be described in detail below with reference to the accompanying drawings.

[0035] Reference Figure 1-6 This utility model provides a high-temperature vacuum molten salt flow environment high-speed rotating friction and wear testing system, including a rotating friction and wear testing system and a computer control system;

[0036] The rotary friction and wear testing system includes a main base plate 13, with a fuma wheel 14 at the bottom of the main base plate 13. A main support platform 9 is horizontally mounted above the main base plate 13 via a support column 12, and a molten salt environment chamber 29 is provided between the main base plate 13 and the main support platform 9.

[0037] The lower part of the molten salt environment chamber 29 is placed inside the high-temperature heating furnace 11 (the high-temperature heating furnace 11 has a heating wire 25 inside) and is integrally formed with the high-temperature heating furnace 11. It is driven to rise and fall by the environment chamber lifting mechanism 16. The top opening of the molten salt environment chamber 29 is provided with a sealing cover 33. An elastic heat-resistant sealing ring is provided between the sealing cover 33 and the top opening of the molten salt environment chamber 29 to ensure good sealing performance of the chamber. A vacuum extraction port 27 and a temperature sensor 22 are provided through the sealing cover 33. The vacuum extraction port 27 is connected to a molecular pump. A pressure gauge is provided at the vacuum extraction port 27. Molten salt injection port 23 and molten salt extraction port 26 are respectively provided on both sides of the molten salt environment chamber 29 between the sealing cover 33 and the top surface of the high-temperature heating furnace 11. The molten salt injection port 23 and molten salt extraction port 26 are connected to the molten salt pump pipeline to realize the flow of molten salt.

[0038] The rotating main shaft 30 is installed through the center of the sealing cover 33 via the rotating magnetic fluid seal 18, realizing the sealing of the cavity and the transmission between the inside and outside of the cavity. The rotating main shaft 30 is supported by the main shaft mounting bearing seat 7 installed on the top surface of the main support platform 9. The bottom of the rotating main shaft 30 is provided with an upper sample fixing plate 24-1, and the bottom of the upper sample fixing plate 24-1 is fixed to the upper sample plate 24-2. The rotating main shaft 30 is symmetrically arranged on both sides, passing through the main support platform 9 and the sealing cover 33 from top to bottom, and extending to the bottom of the molten salt environment cavity 29. The end of the load guide rod 28 that extends into the bottom of the molten salt environment cavity 29 is provided with a lower sample fixing seat 24-3. The lower sample fixing seat 24-3 is equipped with a plate sample 24-4 or a pin sample 24-5. The upper sample fixing plate 24-1, the upper sample plate 24-2, the lower sample fixing seat 24-3, the plate sample 24-4, and the pin sample 24-5 constitute the sample mounting mechanism 24.

[0039] A dynamic torque sensor 10 is provided on the upper part of the rotating spindle 30. The top of the load guide rod 28 is fixed by a linear guide rail 8 installed on the top surface of the main support platform 9. A loading mechanism support platform 34 is provided on the top of the linear guide rail 8. An inverted rotary drive motor 1 is also provided on the top surface of the main support platform 9. Synchronous pulleys 32 are installed at the top of both the rotating spindle 30 and the rotary drive motor 1. The two synchronous pulleys achieve power transmission through a synchronous belt 35, driving the rotating spindle 30 to rotate. A gantry frame 36 is provided on the main support platform 9 between the tops of the two synchronous pulleys. An electric lifting platform 2 is installed on the top of the gantry frame 36. A loading rod 4 is provided at the bottom of the electric lifting platform 2 for loading and unloading the load between the grinding samples. A tension and compression sensor 5 is screwed to the bottom of the loading rod 4. The tension and compression sensor 5 is connected to the top surface of the loading mechanism support platform 34 through a sensor connector 6 to detect the loading force.

[0040] The computer control system is used for human-computer interaction during the testing process. Its signal output terminals are electrically connected to the rotary drive motor 1, the electric lifting mechanism 2, and the molten salt environment chamber lifting mechanism 16, respectively. The signal input terminals of the computer control system are electrically connected to the tension / compression sensor 5, the dynamic torque sensor 10, the temperature sensor 22, and the pressure gauge. The computer control system includes a high-speed data acquisition card, a motion control card, and a computer software system.

[0041] Specifically, the environmental chamber lifting mechanism 16 includes a stepper motor 40. The main shaft of the stepper motor 40 passes through the motor mounting plate 49 and is connected to the lead screw 42 via a coupling 41. Limiting slide rods 43 are provided on the bottom surfaces of both sides of the motor mounting plate 49. The limiting slide rods 43 pass through the lifting slider 44 and are fixed to the base plate. A lifting vertical plate 45 is installed on the lifting slider 44. A high-temperature furnace mounting platform 47 is horizontally fixed on both sides of the vertical plate via triangular ribs 46. The high-temperature heating furnace 11 is installed on the high-temperature furnace mounting platform 47. During testing, the lifting vertical plate 45 is locked by the locking bolts 48 on the side of the lifting slider 44 to ensure the stability of the testing platform.

[0042] Specifically, the outer circumference of the molten salt environment chamber 29 near the top opening is provided with a support platform 37 that is connected to the top load-bearing metal shell of the high-temperature heating furnace 11 and has a diameter larger than that of the molten salt environment chamber 29. This platform can prevent damage to the insulation layer inside the furnace due to the weight of the environment chamber itself and vibration.

[0043] Specifically, a loading spring 21 is provided on the outer periphery of the top of the loading rod 4, and a loading spring box 3 is provided on the outer periphery of the loading spring 21. The loading rod 4 passes through the bottom of the loading spring box 3 and is screwed to the tension and compression sensor 5, which can realize elastic loading and avoid damage to the loading mechanism caused by rigid loading.

[0044] Specifically, an extension platform 38 is provided on the load guide rod 28 near the bottom surface of the host support platform 9, and a shock-absorbing spring 17 is provided between the extension platform 38 and the bottom surface of the host support platform 9 to ensure that the loaded load remains stable.

[0045] Specifically, the load guide rod 28 is connected to the extended flange platform 39 via a corrugated sealing pipe 20 on its outer periphery above the sealing cover 33. The bottom of the corrugated sealing pipe 20 is connected to the top of the sealing cover 33 via a flange. The lower half of the load guide rod 28 penetrates the sealing cover 33 and can extend and retract freely. The extension and retraction distance depends on the extension and retraction parameters of the corrugated sealing pipe 20.

[0046] Specifically, the outer periphery of the pipes of the molten salt inlet 23 and the molten salt outlet 26 is provided with a heat tracing cable 15 to prevent the molten salt flow from freezing and blocking the pipes due to low pipe temperature.

[0047] Specifically, in order to protect the rotating spindle 30 from high temperature damage, the present invention provides a water cooling port 19 on the outer periphery of the rotating magnetohydrodynamic seal 18.

[0048] Specifically, the stator of the dynamic torque sensor 10 is mounted on the bottom surface of the support platform 9 via the sensor mounting plate 31, and the rotor is connected to the rotating main shaft 30. It is used to measure friction torque during the test.

[0049] Specifically, all internal components of the molten salt environment chamber 29 are treated with anti-corrosion coating, which can slow down the rate of molten salt damage and extend service life.

[0050] Before the test begins, the molten salt pump is started, and molten salt is injected into the molten salt environment chamber 29 through the molten salt injection port 23 and extracted from the molten salt extraction port 26, thus realizing the flow of molten salt. The temperature and vacuum data in the molten salt environment chamber 29, as well as the loading force and rotational torque data of the rotating spindle 30, are preset by the computer software system; the molecular pump is started, and a vacuum is drawn through the vacuum extraction port 26. The pressure gauge detects and feeds back to the computer software system, and finally the vacuum degree is adjusted to the preset value; the high-temperature heating furnace 11 is turned on, and the temperature sensor 22 detects and feeds back to the computer software system, and finally the temperature is adjusted to the preset value.

[0051] At the start of the test, the test specimen is installed using the specimen installation mechanism 24 according to the test type (pin-disc friction or disc-disc friction), pin friction radius, and disc specimen test requirements. The electric lifting platform 2 is activated, which, via the loading spring box 3 and loading rod 4, drives the load guide rod 28 and rotating spindle 30 downwards until the test specimen position meets the test requirements. Simultaneously, the tension / compression sensor 5 detects the magnitude of the loading force and feeds it back to the computer software system, ultimately adjusting the loading force to a preset value. The molten salt environment chamber lifting mechanism 16 is activated, adjusting the height of the molten salt environment chamber 29 to ensure the test specimen is fully immersed in the molten salt flow. The rotary drive motor 1 is activated, which, via the synchronous belt 35 and synchronous pulley 32, drives the rotating spindle 30 to rotate. The dynamic torque sensor 10 detects the magnitude of the rotational torque and feeds it back to the computer software system, ultimately adjusting the loading force to a preset value. Friction test data is detected by the dynamic torque sensor 10 and displayed in the computer software system.

[0052] At the end of the test, the molten salt in the molten salt environment chamber 29 is extracted by the molten salt pump. The test sample is taken out when the temperature inside the chamber drops. The test is then completed.

[0053] In summary, this invention designs the molten salt environment chamber 29 as a cylinder, which is evacuated by a molecular pump. Molten salt inlet 23 and molten salt outlet 26 are respectively provided on the outer periphery of the molten salt environment chamber 29. The lower part of the molten salt environment chamber 29 is placed in a high-temperature heating furnace 11, and the flow of molten salt in the molten salt environment chamber 29 is achieved by the molten salt pump. Simultaneously, by setting a lifting mechanism 16 for the molten salt environment chamber 29, the height of the molten salt environment chamber 29 can be adjusted to ensure that the test sample can be completely immersed in the molten salt environment under high-speed rotation. This invention features an ingenious structural design and can be used to investigate the friction and wear performance of moving parts materials under the coupling of multiple factors such as high temperature, high speed, vacuum, force, and molten salt environment, thus providing good experimental support for the research and development of materials used in molten salt flow environments.

Claims

1. A high-temperature vacuum molten salt flow environment high-speed rotating friction and wear testing system, characterized in that, Includes a rotary friction and wear testing system and a computer control system; The rotary friction and wear test system includes a main base plate (13), a main support platform (9) is horizontally arranged above the main base plate (13), and a molten salt environment chamber (29) is provided between the main base plate (13) and the main support platform (9). The lower part of the molten salt environment chamber (29) is placed inside the high-temperature heating furnace (11) and is integrally formed with the high-temperature heating furnace (11). It is driven to lift by the molten salt environment chamber lifting mechanism (16). The top opening of the molten salt environment chamber (29) is provided with a sealing cover (33). A vacuum extraction port (27) and a temperature sensor (22) are installed through the sealing cover (33). A pressure gauge is provided at the vacuum extraction port (27). Molten salt injection port (23) and molten salt extraction port (26) are respectively provided on both sides of the molten salt environment chamber (29) between the sealing cover (33) and the top surface of the high-temperature heating furnace (11). The center of the sealing cover (33) is provided with a rotating main shaft (30) through a rotating magnetic fluid seal (18). The bottom of the rotating main shaft (30) is provided with an upper sample fixing plate (24-1), and the bottom of the upper sample fixing plate (24-1) is fixed with an upper sample plate (24-2). The rotating main shaft (30) is symmetrically provided with load guide rods (28) that pass through the host support platform (9) and the sealing cover (33) from top to bottom and extend to the bottom of the molten salt environment chamber (29). The end of the load guide rod (28) that extends into the bottom of the molten salt environment chamber (29) is provided with a lower sample fixing seat (24-3). The lower sample fixing seat (24-3) is equipped with a plate sample (24-4) or a pin sample (24-5). The upper part of the rotating spindle (30) is provided with a dynamic torque sensor (10), and the top of the load guide rod (28) is fixed by a linear guide rail (8) installed on the top surface of the main support platform (9). The top of the linear guide rail (8) is provided with a loading mechanism support platform (34). The top surface of the main support platform (9) is also provided with an inverted rotary drive motor (1). The top of the rotating spindle (30) and the rotary drive motor (1) are both equipped with synchronous pulleys (32). The two synchronous pulleys are connected to the power transmission through a synchronous belt (35). The main support platform (9) between the tops of the two synchronous pulleys is provided with a gantry frame (36). The top of the gantry frame (36) is equipped with an electric lifting platform (2). The bottom of the electric lifting platform (2) is provided with a loading rod (4). The bottom of the loading rod (4) is screwed with a tension and compression sensor (5). The tension and compression sensor (5) is connected to the top surface of the loading mechanism support platform (34) through a sensor connector (6). The computer control system includes a high-speed data acquisition card and a motion control card for human-computer interaction during the test process. Its signal output terminals are electrically connected to the rotary drive motor (1), the electric lifting platform (2), and the molten salt environment chamber lifting mechanism (16), respectively. The signal input terminals of the computer control system are electrically connected to the tension and compression sensor (5), the dynamic torque sensor (10), the temperature sensor (22), and the pressure gauge.

2. The high-temperature vacuum molten salt flow environment high-speed rotating friction and wear testing system as described in claim 1, characterized in that, The molten salt environment chamber lifting mechanism (16) includes a stepper motor (40). The main shaft of the stepper motor (40) passes through the motor mounting plate (49) and is connected to the lead screw (42) through the coupling (41). Limiting slide rods (43) are provided on the bottom surfaces of both sides of the motor mounting plate (49). The limiting slide rods (43) pass through the lifting slider (44) and are fixed to the base plate. A lifting vertical plate (45) is installed on the lifting slider (44). A high-temperature furnace mounting platform (47) is horizontally fixed on both sides of the vertical plate through triangular ribs (46). The high-temperature heating furnace (11) is installed on the high-temperature furnace mounting platform (47). During the test, the lifting vertical plate (45) is locked by the locking bolts (48) on the side of the lifting slider (44).

3. The high-temperature vacuum molten salt flow environment high-speed rotating friction and wear testing system as described in claim 2, characterized in that, The outer circumference of the molten salt environment chamber (29) near the top opening is provided with a support platform (37) that is connected to the top surface of the high-temperature heating furnace (11) and has a diameter larger than that of the molten salt environment chamber (29).

4. The high-temperature vacuum molten salt flow environment high-speed rotating friction and wear testing system as described in claim 1, characterized in that, The loading rod (4) has a loading spring (21) on its top outer periphery, and a loading spring box (3) is provided on the outer periphery of the loading spring (21). The loading rod (4) passes through the bottom of the loading spring box (3) and is screwed to a tension / compression sensor (5).

5. The high-temperature vacuum molten salt flow environment high-speed rotating friction and wear testing system as described in claim 4, characterized in that, An extension platform (38) is provided on the load guide rod (28) near the bottom surface of the host support platform (9), and a shock-absorbing spring (17) is provided between the extension platform (38) and the bottom surface of the host support platform (9).

6. The high-temperature vacuum molten salt flow environment high-speed rotating friction and wear testing system as described in claim 1, characterized in that, The load guide rod (28) is located above the sealing cover (33) and its outer periphery is connected to the extended flange platform (39) through the corrugated sealing pipe (20). The bottom of the corrugated sealing pipe (20) is connected to the top of the sealing cover (33).

7. The high-temperature vacuum molten salt flow environment high-speed rotating friction and wear testing system as described in claim 1, characterized in that, The outer periphery of the pipes of the molten salt inlet (23) and the molten salt outlet (26) is provided with a heat tracing cable (15).

8. A high-temperature vacuum molten salt flow environment high-speed rotating friction and wear testing system as described in any one of claims 1-7, characterized in that, The host support platform (9) is horizontally installed above the host base plate (13) via support columns (12).

9. A high-temperature vacuum molten salt flow environment high-speed rotating friction and wear testing system as described in any one of claims 1-7, characterized in that, The rotating magnetohydrodynamic seal (18) has a water-cooling port (19) on its outer periphery.

10. A high-temperature vacuum molten salt flow environment high-speed rotating friction and wear testing system as described in any one of claims 1-7, characterized in that, The rotating spindle (30) is supported by a spindle mounting bearing seat (7) mounted on the top surface of the host support platform (9).

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