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

Abstract

The application discloses a high-temperature vacuum molten salt environment rotating friction and wear test system, which comprises a sample groove, a heating furnace, a temperature controller, a rotating friction loading device, a vacuum chamber and an industrial computer, the heating furnace is internally provided with a temperature sensor, the temperature sensor is matched with the temperature controller to realize detection and control of a high-temperature of sample test; the rotating friction loading device comprises a rotating drive motor and a tangential force sensor, and a load loading motor and a load sensor, so that detection and control of the tangential force and load of sample test are realized; the vacuum chamber is provided with a vacuum gauge and a pressure gauge, so that detection and control of the vacuum degree of sample detection are realized; a molten salt sample groove is arranged on a sample table to provide a molten salt environment for sample detection, the whole system has simple structure and reasonable layout, can realize service performance detection of materials under the multi-factor coupling of high temperature-vacuum-force-molten salt environment, and further provides a theoretical reference for performance improvement and practical application of structural materials for molten salt stacks.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of friction and wear testing of materials, and particularly relates to a high-temperature vacuum molten salt environment rotary friction and wear testing system. BACKGROUND

[0002] As one of the fourth generation of fission reactors, the molten salt reactor has attracted widespread attention in recent years due to its high safety, low nuclear waste, and high comprehensive utilization rate. However, the molten salt reactor uses fluoride as a coolant, which has strong corrosive properties, and the operating environment is generally a vacuum environment above 600 DEG C. Such harsh service environment brings great challenges to the structural materials used to make the molten salt reactor, especially the friction and wear of the moving parts of the molten salt reactor. At present, there is no equipment or system that can simulate the corrosion, friction and wear properties of materials in the molten salt reactor environment, which greatly restricts the development of structural materials for the molten salt reactor. SUMMARY

[0003] Based on the above, the purpose of the present application is to provide a high-temperature vacuum molten salt environment rotary friction and wear testing system for investigating the service performance of materials under the combined action of high temperature, vacuum, force and molten salt environment.

[0004] The purpose of the present application is achieved by the following technical solutions:

[0005] A high-temperature vacuum molten salt environment rotary friction and wear testing system, comprising a main frame, a rotary friction loading device and an industrial computer; the top surface of the main frame is provided with a vacuum chamber, the vacuum chamber is provided with an air inlet valve, an air outlet valve, a vacuum gauge, a pressure gauge and a safety valve, and the vacuum chamber is provided with a heating furnace, and the heating furnace is provided with an external heat insulation jacket;

[0006] The rotary friction loading device comprises a friction force measuring device and a load loading device, the friction force measuring device comprises a rotary spindle, the rotary spindle is driven by a rotary drive motor, the rotary spindle extends into the inside of the heating furnace at the top end, and a sample table is installed at the top end; the sample table is provided with a molten salt sample groove, and the sample to be tested is fixed in the molten salt sample groove by a pressing plate, and the molten salt sample groove rotates with the rotary spindle; the bottom end of the rotary spindle penetrates the top plate of the main frame and extends into the shaft sleeve and the magnetic sealing rotating part in sequence;

[0007] The load loading device comprises a loading rod, a reciprocating magnetic seal passing through the top plate of the vacuum chamber is arranged directly above the loading rod, the reciprocating magnetic seal is provided with a Y-direction sliding table at one end inside the vacuum chamber, the Y-direction sliding table is in contact with the top end of the loading rod, a load sensor is arranged at the top end of the reciprocating magnetic seal outside the vacuum chamber, the top end of the load sensor is connected with a Z-direction translation sliding table through a connecting shaft, the Z-direction translation sliding table is driven by a load loading motor, the bottom end of the loading rod passes through the top plate of the vacuum chamber and the furnace cover of the heating furnace and extends into the molten salt sample tank to be in contact with the sample to be measured; the loading rod between the heating furnace and the inside of the top plate of the vacuum chamber is sequentially provided with a sensor connecting beam, a sensor heat insulation sleeve and a Y-direction sliding rail from bottom to top, one end of the sensor connecting beam is connected with the sensor heat insulation sleeve, the sensor heat insulation sleeve is internally provided with a friction force sensor, the end of the sensor heat insulation sleeve away from the loading rod is provided with a rotatable lifting platform, and the rotatable lifting platform is arranged on the top of an X-direction translation sliding table.

[0008] The signal input end of the industrial computer is electrically connected with the temperature sensor, the tangential force sensor and the load sensor respectively, and the signal output end of the industrial computer is electrically connected with the temperature controller, the rotary driving motor and the load loading motor respectively.

[0009] As a preferred technical scheme of the present application, the inner bottom of the main rack is provided with a vacuum pump set, and a vacuum chamber flange interface is arranged through the top plate of the main rack at the inner top of the main rack; the outlet of the vacuum chamber flange interface is connected with the vacuum pump set, and the inlet of the vacuum chamber flange interface is in communication with the vacuum chamber at the top outside of the main rack.

[0010] Further, one end of the rotating main shaft passing through the magnetic seal rotating part is provided with a transmission wheel, and the transmission wheel is connected with the rotary driving motor through a belt transmission.

[0011] Further, the outer side of the rotatable lifting platform is provided with a positioning hole, a locking bolt is arranged in the positioning hole, and the up-down movement and forward / reverse 90° rotation of the rotatable lifting platform can be realized.

[0012] Further, one side of the X-direction translation sliding table is connected with one end of the magnetic seal, and the other end of the magnetic seal passes through the vacuum chamber and is connected with a rotating handle.

[0013] Further, the sample table is fixed to the top of the rotating main shaft through a high-temperature alloy bolt, and the molten salt sample tank is detachably connected with the sample table.

[0014] Further, one end of the shaft sleeve is fixed to the inner top plate of the main rack, and the other end is connected with the magnetic seal rotating part.

[0015] Further, the top plate of the main rack is provided with a sealed junction box on the lower surface.

[0016] Further, the bottom of the main rack is provided with a Foma wheel.

[0017] Further, the vacuum chamber is a box type with front opening door.

[0018] The present application has the following advantages:

[0019] 1、The system comprises a sample tank, a heating furnace, a temperature controller, a rotary friction loading device, a vacuum chamber and an industrial computer, the heating furnace is provided with a temperature sensor, the temperature sensor is matched with the temperature controller to realize detection and control of high temperature of sample testing; the rotary friction loading device comprises a rotary driving motor and a tangential force sensor, and a load loading motor and a load sensor, to realize detection and control of friction and load of sample testing; the vacuum chamber is provided with a vacuum gauge and a pressure gauge, to realize detection and control of vacuum degree of sample testing; a molten salt sample tank is arranged on the sample table to provide a molten salt environment for sample testing, the whole system has simple structure and reasonable layout, and can realize service performance detection of materials under the coupling action of high temperature, vacuum, force and molten salt environment, thereby providing a theoretical reference for performance improvement and practical application of structural materials for molten salt reactors.

[0020] 2、The rotatable lifting platform is installed on the X-direction translation sliding table, the X-direction translation sliding table can move left and right to drive the loading rod to move in the X direction, so as to determine the size of the friction radius.

[0021] 3、The sealing junction box is arranged in the main rack, and the collection and transmission of force, temperature and other signals and control cables are in and out through the sealing junction box, so that the vacuum environment of sample testing is not affected by the incoming and outgoing lines.

[0022] 4、The rotatable lifting platform is provided with a positioning hole on the outer side, a locking bolt is installed in the positioning hole, and the up-down movement and forward / reverse 90° rotation of the rotatable lifting platform can be realized, so that the adjustment of sample testing of different thicknesses and the loading and unloading of the loading rod are facilitated.

[0023] 5、The molten salt sample tank is detachably connected with the sample table, and the molten salt sample tank can be taken out after the test is completed to facilitate cleaning.

[0024] 6、The vacuum chamber adopts a front opening door mode, compared with a traditional glove box vacuum chamber, the vacuum chamber is convenient to operate and has better sealing performance, an observation window is arranged on the sealing cabin door of the vacuum chamber, the cabin door and the vacuum chamber body are sealed by a temperature-resistant rubber ring, air inlet and outlet valves are arranged on the wall of the cabin body, the vacuum degree in the cabin is detected by a composite silicon, a pressure gauge is arranged, the positive pressure in the cabin is measured, and a safety pressure relief valve is arranged on the wall of the cabin, so that the pressure in the vacuum chamber is ensured to be within the designed safety range.

[0025] 7、One side of the X-direction translation sliding table is connected with one end of a magnetic seal, and the other end of the magnetic seal penetrates out of the vacuum chamber and is connected with a rotating handle, so that repeated measurement of different friction radii under the same condition is facilitated.

[0026] 8. The bottom of the main frame of this invention is equipped with casters. Unlike other casters, casters are height-adjustable, can be fixed, and can be rolled to meet different usage needs. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the high-temperature vacuum molten salt environment friction and wear testing equipment of the present invention;

[0028] Figure 2 This is the electrical schematic diagram of the test system of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the sealed junction box of the present invention;

[0030] Figure 4 This is a schematic diagram of the molten salt sample tank of the present invention;

[0031] Reference numerals: 1. Main frame; 2. Vacuum pump assembly; 3. Vacuum chamber flange interface; 4. Rotary drive motor; 5. Transmission wheel; 6. Magnetic seal rotating component; 7. Rotary spindle; 8. Sealed junction box; 9. Sample stage; 10. Molten salt sample tank; 11. Heating furnace; 12. Loading rod; 13. Sensor connecting beam; 14. Friction sensor; 15. Sensor heat insulation jacket; 16. Rotatable lifting platform; 17. X-direction translation slide; 18. Vacuum chamber; 19. Inlet valve; 20. Outlet valve; 21. Vacuum gauge; 22. Pressure gauge; 23. Safety valve; 24. Load loading motor; 25. Z-direction translation slide; 26. Connecting shaft; 27. Load sensor; 28. Reciprocating magnetic seal; 29. ​​Insulated water jacket; 30. Y-direction slide; 31. Fuma wheel; 32. Main frame top plate; 33. Bushing; 34. Rotary handle. Detailed Implementation

[0032] The structure and working process of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] like Figures 1-4 As shown, the present invention provides a high-temperature vacuum molten salt environment rotary friction and wear testing system, including a main frame 1, a rotary friction loading device and an industrial control computer; the bottom of the main frame 1 is provided with a fuma wheel 31, the upper surface of the main frame top plate 32 is provided with a vacuum chamber 18, the vacuum chamber 18 is a box-type front-opening door, the vacuum chamber 18 is provided with an inlet valve 19, an outlet valve 20, a vacuum gauge 21, a pressure gauge 22 and a safety valve 23, a heating furnace 11 is provided inside the vacuum chamber 18, the heating furnace 11 is provided with a hot water jacket 29 outside, and a sealed junction box 8 is provided on the lower surface of the main frame top plate 32.

[0034] The rotating friction loading device comprises a friction force measuring device and a load loading device. The friction force measuring device comprises a rotating spindle 7 driven by a rotating drive motor 4, the top end of the rotating spindle 7 extends into the inside of a heating furnace 11, the top end is fixed to a sample table 9 by high-temperature alloy bolts, a molten salt sample groove 10 is connected to the sample table 9 by bolts, a sample to be measured is fixed in the molten salt sample groove 10 by a pressing plate, and the molten salt sample groove 10 rotates with the rotating spindle 7; the bottom end of the rotating spindle 7 penetrates through the top plate 32 of the main frame, sequentially extends into the shaft sleeve 33 and the magnetic sealing rotating part 6, one end of the shaft sleeve 33 is fixed to the top plate on the inner side of the main frame 1, the other end is connected to the magnetic sealing rotating part 6, and one end of the rotating spindle 7 penetrating out of the magnetic sealing rotating part 6 is provided with a transmission wheel 5, and the transmission wheel 5 is connected to the rotating drive motor 4 through a belt transmission.

[0035] The load loading device comprises a loading rod 12, the top end of the loading rod 12 is provided with a reciprocating magnetic sealing part 28, the reciprocating magnetic sealing part 28 is installed on the top plate of a vacuum chamber 18, the bottom end of the reciprocating magnetic sealing part 28 is provided with a Y-direction sliding table 30, the top end is provided with a load sensor 27, the top end of the load sensor 27 is connected to a Z-direction translation sliding table 25 through a connecting shaft 26, the Z-direction translation sliding table 25 is driven by a load loading motor 24, the bottom end of the loading rod 12 penetrates through the top plate of the vacuum chamber 18 and the cover of the heating furnace 11 and extends into the molten salt sample groove 10 to contact the sample to be measured. From bottom to top, the loading rod 12 between the heating furnace 11 and the inside of the top plate of the vacuum chamber 18 is sequentially provided with a sensor connecting beam 13, a sensor heat insulation sleeve 15 and the Y-direction sliding rail 30, one end of the sensor connecting beam 13 is connected to the sensor heat insulation sleeve 15, the sensor heat insulation sleeve 15 is provided with a tangential force sensor 14, the end far from the loading rod 12 of the sensor heat insulation sleeve 15 is provided with a rotatable lifting table 16 installed on the top of an X-direction translation sliding table 17, the outer side of the rotatable lifting table 16 is provided with a positioning hole, a locking bolt is installed in the positioning hole, and the up-down movement and forward / reverse 90° rotation of the rotatable lifting table 16 can be realized, and the X-direction translation sliding table 17 is installed on the bottom plate in the vacuum chamber 18; one side of the X-direction translation sliding table 17 is connected to one end of a magnetic sealing part (prior art, not shown in the figure), and the other end of the magnetic sealing part penetrates out of the vacuum chamber 18 and is connected to a rotating handle 34.

[0036] The signal input end of the industrial computer is electrically connected with the temperature sensor, the tangential force sensor and the load sensor, and the signal output end of the industrial computer is electrically connected with the temperature controller, the rotating drive motor and the load loading motor.

[0037] The inside bottom of the main frame 1 is further provided with a vacuum pump set 2, and the inside top of the main frame 1 is provided with a vacuum chamber flange interface 3 penetrating through the top plate 32 of the main frame; the outlet of the vacuum chamber flange interface 3 is connected to the vacuum pump set 2, and the inlet of the vacuum chamber flange interface 3 is communicated with the vacuum chamber 18 on the outside top of the main frame 1.

[0038] When the system is used to test the high-temperature vacuum molten salt environment friction and wear performance of materials, the sample to be tested is first fixed in the molten salt sample groove 10 through the pressing plate, and the vacuum degree in the vacuum chamber 18 is adjusted. The preset temperature in the heating furnace 11 is set on the human-computer interface of the industrial computer, and the industrial computer sends the preset temperature command to the temperature controller (which can be realized by the prior art, not shown in the figure). The temperature controller cooperates with the temperature sensor (prior art, not shown in the figure) to adjust the temperature in the heating furnace 11 to the preset temperature. Subsequently, the load and the friction rotation speed are set through the industrial computer software, at the same time, the horizontal position of the X-direction translation stage 17 and the vertical height of the rotatable lifting platform 16 are adjusted manually / electrically by the rotation handle 34 (electric adjustment can be realized by adding a motor), the position of the grinding is determined, and after the setting is completed, the load loading motor 24 is started. The load loading motor 24 drives the connecting shaft 26 through the Z-direction translation stage 25 to move, drives the reciprocating magnetic seal 28 to move downward through the connecting shaft 26, and applies a load to the loading rod 12 through the reciprocating magnetic seal 28 at the bottom of the Y-direction sliding stage 30. The actual size of the loading force is detected by the load sensor 27 and fed back to the industrial computer, and finally the loading force is adjusted to the preset value. Finally, the rotation driving motor 4 is started, the rotating main shaft 7 is driven to rotate through the belt and the transmission wheel 5, the molten salt sample groove 10 is driven to rotate by the rotating main shaft 7, and the sample to be tested fixed in the molten salt sample groove 10 rotates, the actual size of the friction rotation speed during the test is detected by the driver of the rotation driving motor 4 and fed back to the industrial computer, and finally adjusted to the preset value. Thus, the test is formally started, and the friction force obtained by the test is detected by the friction force sensor 14 and fed back to the industrial computer.

[0039] The load loading of the system can also be realized by adding weights on the top of the reciprocating magnetic seal 28, so as to realize precise loading of small load.

Claims

1. A high temperature vacuum molten salt environment rotary friction and wear test system, characterized in that, The mainframe includes a rotating friction loading device and an industrial computer; the top surface of the mainframe top plate is provided with a vacuum chamber, and the vacuum chamber is provided with an air inlet valve, an air outlet valve, a vacuum gauge, a pressure gauge and a safety valve; the vacuum chamber is provided with a heating furnace, and the heating furnace is provided with a temperature sensor; the heating furnace is provided with an external heat insulation jacket; The rotating friction loading device includes a friction force measuring device and a load loading device; the friction force measuring device includes a rotating main shaft, which is driven by a rotating drive motor; the top end of the rotating main shaft extends into the heating furnace; the top end of the rotating main shaft is provided with a sample table; the sample table is provided with a molten salt sample groove; the sample to be measured is fixed in the molten salt sample groove by a pressing plate; the molten salt sample groove rotates with the rotating main shaft; the bottom end of the rotating main shaft extends into the shaft sleeve and the magnetic sealing rotating part through the mainframe top plate; The sample table is fixed on the top of the rotating main shaft by high-temperature alloy bolts; the molten salt sample groove is detachably connected with the sample table; one end of the shaft sleeve is fixed on the inside top plate of the mainframe; the other end of the shaft sleeve is connected with the magnetic sealing rotating part; The load loading device includes a loading rod; the top of the loading rod is provided with a reciprocating magnetic sealing part which penetrates the vacuum chamber top plate; one end of the reciprocating magnetic sealing part is provided with a Y-direction sliding table inside the vacuum chamber; the Y-direction sliding table is in contact with the top end of the loading rod; the top end of the reciprocating magnetic sealing part outside the vacuum chamber is provided with a load sensor; the top end of the load sensor is connected with a Z-direction translation sliding table through a connecting shaft; the Z-direction translation sliding table is driven by a load loading motor; the bottom end of the loading rod extends into the molten salt sample groove through the heating furnace cover and is in contact with the sample to be measured; the loading rod between the heating furnace and the inside top plate of the vacuum chamber is sequentially provided with a sensor connecting beam, a sensor heat insulation jacket and a Y-direction sliding rail from bottom to top; one end of the sensor connecting beam is connected with the sensor heat insulation jacket; the sensor heat insulation jacket is provided with a friction force sensor; the end of the sensor heat insulation jacket away from the loading rod is provided with a rotatable lifting platform; the rotatable lifting platform is provided on the top of an X-direction translation sliding table; the X-direction translation sliding table is installed on the inside bottom plate of the vacuum chamber. The signal input end of the industrial computer is electrically connected with the temperature sensor, the friction force sensor and the load sensor; the signal output end of the industrial computer is electrically connected with the temperature controller, the rotating drive motor and the load loading motor.

2. A high temperature vacuum molten salt environment rotary friction and wear test system as claimed in claim 1, wherein, The inside bottom of the mainframe is provided with a vacuum pump group; the inside top of the mainframe is provided with a vacuum chamber flange interface which penetrates the mainframe top plate; the outlet of the vacuum chamber flange interface is connected with the vacuum pump group; the inlet of the vacuum chamber flange interface is in communication with the vacuum chamber outside the top of the mainframe.

3. A high temperature vacuum molten salt environment rotary friction and wear test system as claimed in claim 1, wherein, The end of the rotating main shaft penetrating the magnetic sealing rotating part is provided with a transmission wheel; the transmission wheel is connected with the rotating drive motor through a belt transmission.

4. A high temperature vacuum molten salt environment rotary friction and wear test system as claimed in claim 1, wherein, The outside of the rotatable lifting platform is provided with a positioning hole; a locking bolt is installed in the positioning hole; the up-down movement and the forward / reverse 90° rotation of the rotatable lifting platform can be realized.

5. A high temperature vacuum molten salt environment rotary friction and wear test system as claimed in claim 1, wherein, One side of the X-direction translation sliding table is connected with one end of the magnetic sealing part; the other end of the magnetic sealing part penetrates the vacuum chamber and is connected with a rotating handle.

6. A high temperature vacuum molten salt environment rotary friction and wear test system according to any one of claims 1 to 5, wherein, The lower surface of the mainframe top plate is provided with a sealed junction box.

7. A high temperature vacuum molten salt environment rotary friction and wear test system as claimed in any one of claims 1 to 5 wherein, The bottom of the mainframe is provided with a Foma wheel.

8. A high temperature vacuum molten salt environment rotary friction and wear test system as claimed in any one of claims 1 to 5 wherein, The vacuum chamber is a box type front opening door type.

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