Equipment for heat treatment and assembly of liquid metal bearing

Abstract

The invention relates to the technical field of liquid metal bearing assembly, in particular to equipment for heat treatment and assembly of a liquid metal bearing. The device comprises a heat treatment furnace, a transition cabin, an assembly box and a transition box, the feeding and discharging end of the heat treatment furnace is in sealed connection with the first feeding and discharging end of the transition box, the second feeding and discharging end of the transition box is in sealed connection with the first feeding and discharging end of the assembly box, and the second feeding and discharging end of the assembly box is in sealed connection with the first feeding and discharging end of the transition cabin; a gas circulation purification system is arranged between the assembly box and the transition box, and air in the assembly box and the transition box is purified through the gas circulation purification system. The liquid metal bearing can be assembled in the vacuum and inert gas atmosphere, it is guaranteed that the liquid metal bearing cannot be oxidized before being assembled, and the sealing performance of the assembled liquid metal bearing is improved.

Description

Technical Field

[0001] The invention relates to the technical field of liquid metal bearing assembly, in particular to a device used for heat treatment and assembly of liquid metal bearings. Background Art

[0002] The structural parts of the liquid metal bearing used in the CT tube are mostly connected by screws, which makes it possible for the liquid metal sealed in the bearing gap to leak. During the operation of the CT tube, the anode rotates at high speed, and the liquid bearing supporting the anode rotates at a speed of 10,000 rpm. The high pressure caused by the high speed may also cause leakage of the liquid metal bearing.

[0003] In the prior art, the industry assembles liquid metal bearings by using PVD or CVD technology to coat a thin film on the inside of the sleeve that is conducive to the adhesion of liquid metal, and then assembles the bearing, pours the liquid metal into the small hole at the bottom of the sleeve, and then seals it. The existing assembly of liquid metal bearings has the following problems: First, during the process from coating to assembly of the bearing, the surface and interior of the parts will inevitably contact and store some air, which makes it easy to oxidize the liquid metal in subsequent processes; second, because the bearing is assembled first and then the liquid metal is poured from the small hole at the bottom, the gap between the shaft and the sleeve is very small, making it difficult to pour and even more difficult to ensure that a sufficient amount is poured; third, the sealing of the small hole at the bottom of the sleeve is also a test of the assembly process. Summary of the invention

[0004] In response to the shortcomings of the above-mentioned existing production technology, the present application provides a device for heat treatment and assembly of liquid metal bearings, which can assemble liquid metal bearings in a vacuum and inert gas atmosphere, avoid contact with oxygen during the bearing assembly process, and improve the sealing performance of the liquid metal bearing after assembly.

[0005] The technical solution adopted by the present invention is as follows: A device for heat treatment and assembly of liquid metal bearings, comprising a heat treatment furnace, a transition chamber, an assembly box and a transition chamber, wherein the inlet and outlet ends of the heat treatment furnace are sealedly connected to the first inlet and outlet ends of the transition chamber, the second inlet and outlet ends of the transition chamber are sealedly connected to the first inlet and outlet ends of the assembly box, and the second inlet and outlet ends of the assembly box are sealedly connected to the first inlet and outlet ends of the transition chamber; an assembly box glove interface is arranged on the front end face of the assembly box, and operating gloves are connected to the assembly box glove interface; an outer door of the transition chamber is arranged on the second inlet and outlet ends of the transition chamber, and an inner door of the transition chamber is arranged on the first inlet and outlet end of the transition chamber; a transition box glove interface is arranged on the front end face of the transition chamber, and operating gloves are connected to the transition box glove interface; a side glove interface is arranged on the right side face of the transition chamber, and operating gloves are connected to the side glove interface; a gas circulation purification system is arranged between the assembly box and the transition chamber, and the air in the assembly box and the transition chamber is purified by the gas circulation purification system.

[0006] Furthermore, a vacuum extraction interface is provided on the transition cabin, and the vacuum extraction interface is connected to an external vacuum extraction device through a vacuum extraction pipeline. The vacuum extraction device can vacuum the transition cabin through the vacuum extraction interface. An air intake interface is provided on the transition cabin, and the air intake interface is connected to an air intake pipe. The air intake pipe is connected to an external air supply device, and the air supply device can inject inert gas into the transition cabin through the air intake interface. A vacuum sensor is also provided in the transition cabin, and the vacuum sensor can detect the vacuum degree in the transition cabin.

[0007] Furthermore, a cleaning window is arranged on the side wall of the assembly box, and a box cover is arranged on the cleaning window. One end of the box cover is hinged on the upper side of the cleaning window, and the left and right sides of the box cover are connected to the left and right sides of the cleaning window through gas struts. The assembly box glove interface is arranged on the box cover, and a sealing ring is arranged on the edge of the box cover, and the sealing ring can realize a sealed connection between the box cover and the cleaning window.

[0008] Furthermore, the gas circulation purification system includes a first activated carbon filter element arranged in an assembly box and a second activated carbon filter element arranged in a transition box. The air outlet of the second activated carbon filter element is connected to the air inlet end of the fan through a pipeline, the air outlet end of the fan is connected to the air inlet end of the purification barrel, and the air outlet end of the purification barrel is connected to the air inlet end of the first activated carbon filter element through a pipeline. The fan and the purification barrel are arranged outside the transition box and the assembly box, and a copper catalyst and a molecular sieve are arranged in the purification barrel. The copper catalyst is used to adsorb moisture in the air, and the molecular sieve is used to screen out oxygen molecules. Water and oxygen sensors are arranged in the transition box, and the water and oxygen content in the transition box are detected by the water and oxygen sensors.

[0009] Furthermore, the heat treatment furnace includes a furnace body, a reflective screen assembly is arranged in the furnace body, a heater is connected to the reflective screen assembly, three electrode assemblies are connected to the upper part of the furnace body, the rear end of the furnace body is connected to the rear furnace door through a hinge, the rear furnace door and the furnace body are locked by multiple manual quick calipers, an observation window is arranged on the rear furnace door, and a vacuum gate valve is connected to the vacuum interface of the furnace body, and the vacuum gate valve can control the on and off of the vacuum interface of the furnace body.

[0010] Furthermore, the reflective screen assembly is a multi-layer structure, and the reflective screen assembly has six layers in total. The innermost three layers of the reflective screen assembly are made of molybdenum skin, and the remaining three layers are made of ordinary stainless steel plate materials.

[0011] Furthermore, a furnace bed is arranged in the furnace body, the furnace bed is located in the reflective screen assembly, a plurality of rollers are arranged on the furnace bed along the length direction, a tray is placed on the furnace bed, the tray can move smoothly through the rollers, the tray is used to carry the parts to be heat treated, and a handle is welded on the tray facing the front side of the furnace body.

[0012] Furthermore, a cooling water trough is arranged in the furnace body wall, a cooling water inlet is arranged at the lower rear of the furnace body, the cooling water inlet is connected to the cooling water trough, and a cooling water outlet is arranged at the upper front of the furnace body, the cooling water outlet is connected to the cooling water trough.

[0013] Furthermore, the front end of the furnace body is connected to the front wall of the furnace body, an inlet and outlet are arranged on the front wall of the furnace body, a front furnace door is arranged on the inlet and outlet, a furnace wall cold water trough is arranged in the front wall of the furnace body, a furnace wall water inlet is arranged at the lower part of the front wall of the furnace body, the furnace wall water inlet and the furnace wall cold water trough are connected, and a furnace wall water outlet is arranged at the upper part of the front wall of the furnace body, and the furnace wall water outlet and the furnace wall cold water trough are connected.

[0014] Furthermore, a furnace door cold water trough is arranged in the front furnace door, a furnace door water inlet and a furnace door water outlet are arranged on the front furnace door, and the furnace door cold water trough is connected with the furnace door water inlet and the furnace door water outlet respectively.

[0015] The beneficial effects of the present invention are as follows: The present invention can assemble liquid metal bearings in a vacuum and inert gas atmosphere, ensuring that the liquid metal bearings will not be oxidized before assembly is completed, thereby improving the sealing performance of the liquid metal bearings after assembly; the gas circulation purification system of the present invention can purify the air in the assembly box and the transition box, ensuring that the liquid metal will not come into contact with oxygen from the time of painting until the bearing assembly is completed; the transition cabin of the present invention can be evacuated and inert gas can be introduced, ensuring that oxygen will not enter the assembly box from the transition cabin. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the present invention.

[0017] Figure 2 It is a top view of the present invention.

[0018] Figure 3 It is a top view of the heat treatment furnace of the present invention.

[0019] Figure 4 It is a half-section view of the heat treatment furnace of the present invention.

[0020] Figure 5 It is a three-dimensional diagram of the hearth and tray of the present invention.

[0021] Figure 6 It is a schematic diagram of the structure of the gas circulation purification system of the present invention.

[0022] Among them: 1. Heat treatment furnace; 2. Transition chamber; 3. Assembly box; 4. Transition box; 5. Transition chamber outer door; 6. Assembly box glove interface; 7. Transition box glove interface; 8. Box cover; 9. Gas strut; 10. Purification barrel; 11. Fan; 12. Tray; 13. Handle; 14. Hearth; 15. Roller; 16. Furnace body; 17. Rear furnace door; 18. Front furnace door; 19. Reflection screen assembly; 20. Cooling water trough; 21. Cooling water inlet; 22. Cold water outlet; 23. Heater; 24. Electrode assembly; 25. Furnace body front wall; 26. Furnace wall cold water trough; 27. Furnace wall water inlet; 28. Furnace wall outlet; 29. ​​Furnace door cold water trough; 30. Vacuum plug valve; 31. First activated carbon filter element; 32. Second activated carbon filter element; 33. Water and oxygen sensors. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is described below in conjunction with the accompanying drawings.

[0024] like Figure 1 and Figure 2 As shown, a device for heat treatment and assembly of liquid metal bearings mainly includes a heat treatment furnace 1, a transition chamber 2, an assembly box 3 and a transition box 4, the inlet and outlet ends of the heat treatment furnace 1 are sealed connected to the first inlet and outlet ends of the transition box 4, the second inlet and outlet ends of the transition box 4 are sealed connected to the first inlet and outlet ends of the assembly box 3, and the second inlet and outlet ends of the assembly box 3 are sealed connected to the first inlet and outlet ends of the transition chamber 2.

[0025] The inlet and outlet ends of the heat treatment furnace 1 and the first inlet and outlet ends of the transition box 4 are sealed connected via flanges, the second inlet and outlet ends of the transition box 4 and the first inlet and outlet ends of the assembly box 3 are sealed connected via flanges, and the second inlet and outlet ends of the assembly box 3 and the first inlet and outlet ends of the transition cabin 2 are sealed connected via flanges.

[0026] The side walls of the assembly box 3 and the transition box 4 are made of transparent materials, such as tempered glass, and external operators can clearly observe the internal conditions of the assembly box 3 and the transition box 4 through the side walls of the assembly box 3 and the transition box 4.

[0027] like Figure 1 and Figure 2 As shown, an assembly box glove interface 6 is provided on the front end surface of the assembly box 3 , and an operating glove is connected to the assembly box glove interface 6 . The operator operates the product in the assembly box 3 by inserting his hand into the operating glove.

[0028] During the painting and transportation process, the liquid metal may spill onto the bottom of the assembly box 3, so it is necessary to open one side of the assembly box 3 from time to time to clean the inside of the box. Figure 1 and Figure 2As shown, a cleaning window is arranged on the side wall of the assembly box 3, and a box cover 8 is arranged on the cleaning window. One end of the box cover 8 is hinged on the upper side of the cleaning window, and the left and right sides of the box cover 8 are connected to the left and right sides of the cleaning window through a gas strut 9. The box cover 8 can be operated to open or close as needed. The assembly box glove interface 6 can be arranged on the box cover 8, and the box cover 8 is made of tempered glass material. A sealing ring is arranged on the edge of the box cover 8, and the sealing ring can realize a sealed connection between the box cover 8 and the cleaning window. The box cover 8 and the assembly box 3 are detachably connected by a connecting piece to realize the locking of the box cover 8 and the assembly box 3. Due to the arrangement of the box cover 8, the workload of each cleaning of the assembly box 3 is greatly reduced and only one person is required to complete it in a time-saving and labor-saving manner.

[0029] like Figure 1 and Figure 2 As shown, the second inlet and outlet end of the transition chamber 2 is provided with an outer door 5 of the transition chamber, which can open or close the second inlet and outlet end of the transition chamber 2 to achieve sealing of the transition chamber 2. The first inlet and outlet end of the transition chamber 2 is provided with an inner door of the transition chamber, which can open or close the first inlet and outlet end of the transition chamber 2.

[0030] The transition cabin 2 is provided with a vacuum interface, which is connected to an external vacuum device through a vacuum pipeline, and the vacuum device can evacuate the transition cabin 2 through the vacuum interface. The transition cabin 2 is also provided with an air intake interface, which is connected to an air intake pipe, and the air intake pipe is connected to an external air supply device, and the air supply device can inject inert gas into the transition cabin 2 through the air intake interface. A vacuum sensor is also provided in the transition cabin 2, and the vacuum sensor can detect the vacuum degree in the transition cabin 2.

[0031] The transition chamber 2 is used for products to enter and exit the assembly box 3. When working, first open the outer door 5 of the transition chamber, put the parts that need to be heat treated and assembled into the transition chamber 2, and then close the outer door 5 of the transition chamber. In order to prevent the oxygen and moisture in the transition chamber 2 from entering the assembly box 3 and causing an impact, the transition chamber 2 is evacuated, and after the vacuum degree in the monitoring chamber reaches 50Pa, inert gas is injected into the transition chamber 2. Then, the staff opens the inner door of the transition chamber 2 of the transition chamber 2 through the operating gloves on the assembly box 3, and moves the products in the transition chamber 2 to the transition box 4.

[0032] The transition box 4 is mainly used for transferring products between the assembly box 3 and the heat treatment furnace 1. Figure 1 and Figure 2As shown, a transition box glove interface 7 is provided on the front face of the transition box 4, and operating gloves are connected to the transition box glove interface 7. The operator can operate the product in the transition box 4 by inserting his hand into the operating gloves. The transition box glove interface 7 is an elliptical structure, and the elliptical major axis of the transition box glove interface 7 is perpendicular to the ground, which makes it convenient for the operator to insert his arm into the transition box 4 and pull the tray in the heat treatment furnace 1. A side glove interface is provided on the right side of the transition box 4, and operating gloves are connected to the side glove interface. After opening the furnace door of the heat treatment furnace 1, the side glove interface can be used to open the furnace door to the bottom, avoiding the right hand blocking the furnace door during front operation, so that the furnace door can be fully opened.

[0033] like Figure 1 As shown, a gas circulation purification system is arranged between the assembly box 3 and the transition box 4, and the air in the assembly box 3 and the transition box 4 is purified by the gas circulation purification system.

[0034] like Figure 6 As shown, the gas circulation purification system includes a first activated carbon filter element 31 arranged in the assembly box 3 and a second activated carbon filter element 32 arranged in the transition box 4, the air outlet of the second activated carbon filter element 32 is connected to the air inlet end of the fan 11 through a pipeline, the air outlet end of the fan 11 is connected to the air inlet end of the purification barrel 10, the air outlet end of the purification barrel 10 is connected to the air inlet end of the first activated carbon filter element 31 through a pipeline, and the fan 11 and the purification barrel 10 are arranged outside the transition box 4 and the assembly box 3.

[0035] When in use, the assembly box 3 has the highest requirement for the water and oxygen content of the air, while the transition box 4 has the lowest requirement for the water and oxygen content. Therefore, the fan 11 needs to actively extract and purify the gas in the transition box 4 and transport the purified air to the assembly box 3. The gas in the transition box 4 extracted by the fan 11 is first filtered through the second activated carbon filter element 32, which can adsorb large suspended particles and organic matter. Then it enters the purification barrel 10 for purification. The purification barrel 10 is provided with a copper catalyst and a molecular sieve. The copper catalyst is used to adsorb moisture in the air, and the molecular sieve is used to screen out oxygen molecules. The treated air enters the assembly box 3 through the first activated carbon filter element 31. For the same reason, a water and oxygen sensor 33 is provided in the transition box 4, and the water and oxygen content in the transition box 4 is detected by the water and oxygen sensor 33.

[0036] Preferably, the water and oxygen sensor 33 can be set at the upper right corner of the transition box 4, the first activated carbon filter element 31 is set at the lower left corner of the assembly box 3, and the second activated carbon filter element 32 is set at the lower right corner of the transition box 4. The upper right corner of the transition box 4 is farthest from the first activated carbon filter element 31, and the water and oxygen content here is the highest. Therefore, the water and oxygen sensor 33 is set at this position so that the water and oxygen values ​​in the entire assembly box 3 and the transition box 4 can reach the required indicators.

[0037] like Figure 3and Figure 4 As shown, the heat treatment furnace 1 includes a furnace body 16, which is a hollow structure. A cooling water tank 20 is arranged in the wall of the furnace body 16, and a cooling water inlet 21 is arranged at the lower rear of the furnace body 16, and the cooling water inlet 21 is connected to the cooling water tank 20. A cooling water outlet 22 is arranged at the upper front of the furnace body 16, and the cooling water outlet 22 is connected to the cooling water tank 20. The external cooling water circulation component passes cooling water into the cooling water tank 20 through the cooling water inlet 21, and the cooling water has a cooling effect on the wall of the furnace body 16, and the cooling water flows out of the furnace body 16 through the cooling water outlet 22.

[0038] like Figure 3 and Figure 4 As shown, a reflective screen assembly 19 is arranged in the furnace body 16. The reflective screen assembly 19 is a multi-layer structure. The reflective screen assembly 19 has six layers. The innermost three layers of the reflective screen assembly 19 are made of molybdenum skin, and the remaining three layers are made of ordinary stainless steel plate materials. A heater 23 is connected to the reflective screen assembly 19. The heater 23 is a ring structure and is also made of molybdenum strip. Three electrode assemblies 24 are connected to the upper part of the furnace body 16.

[0039] like Figure 4 and Figure 5 As shown, a furnace bed 14 is arranged in a furnace body 16, and the furnace bed 14 is located in a reflective screen assembly 19. A plurality of rollers 15 are arranged on the furnace bed 14 along the length direction, and a tray 12 is placed on the furnace bed 14, and the tray 12 can move smoothly through the rollers 15. The tray 12 is used to carry the parts to be heat treated, and a handle 13 is welded on the front side of the tray 12 facing the furnace body 16, and the handle 13 is convenient for the operator to pull the tray 12.

[0040] like Figure 3 and Figure 4 As shown, the rear end of the furnace body 16 is connected to the rear furnace door 17 by a hinge, and the rear furnace door 17 and the furnace body 16 are locked by multiple manual quick clamps. An observation window is set on the rear furnace door 17, and the transportation of the workpiece can be observed through the observation window during the operation of the workpiece. The observation window is made of high-temperature resistant quartz glass material.

[0041] like Figure 4 As shown, the front end of the furnace body 16 is connected to the furnace body front wall 25, and the furnace body front wall 25 is provided with an inlet and outlet, and the inlet and outlet is provided with a front furnace door 18. A furnace wall cold water trough 26 is provided in the furnace body front wall 25, a furnace wall water inlet 27 is provided at the lower part of the furnace body front wall 25, and the furnace wall water inlet 27 is connected to the furnace wall cold water trough 26, and a furnace wall water outlet 28 is provided at the upper part of the furnace body front wall 25, and the furnace wall water outlet 28 is connected to the furnace wall cold water trough 26.

[0042] like Figure 4As shown, a furnace door cold water trough 29 is arranged in the front furnace door 18, and a furnace door water inlet and a furnace door water outlet are also arranged on the front furnace door 18, and the furnace door cold water trough 29 is connected with the furnace door water inlet and the furnace door water outlet respectively.

[0043] Since the front end of the furnace body 16 is butted against the transition box 4 , in order to prevent the high temperature in the furnace body 16 from affecting the transition box 4 , water cooling structures are provided on the furnace body front wall 25 and the front furnace door 18 for cooling.

[0044] like Figure 3 As shown, the vacuum interface of the furnace body 16 is connected to a vacuum gate valve 30, which can control the on and off of the vacuum interface of the furnace body 16. The vacuum interface of the furnace body 16 is connected to an external vacuum pumping device, which can vacuum the furnace body 16.

[0045] The present invention adds a heat treatment process to the production process of liquid metal bearings. After the sleeve is coated, the bearing parts are placed in a heat treatment furnace 1 for vacuum high-temperature degassing, which can quickly and effectively discharge the gas dissolved in the material, and then use 5% hydrogen to further reduce the parts at high temperature, so that the parts are better attached to the liquid metal. At the same time, the present invention combines the heat treatment furnace 1 with a glove box that can provide an inert gas atmosphere for bearing assembly, thereby achieving the purpose of preventing the liquid metal from being exposed to oxygen from the time of painting until the bearing assembly is completed.

[0046] The heat treatment furnace 1 of the present invention is responsible for the heat treatment of the product. The transition box 4 of the present invention is used to connect the heat treatment furnace 1 and the assembly box 3, and is a space for transitional storage of parts. The assembly box 3 of the present invention is mainly used for brushing liquid metal and assembling bearings. The transition cabin 2 of the present invention is used for the entry and exit of products.

[0047] The assembly and heat treatment process of the present invention is: first confirm that the water and oxygen content in the equipment is less than 1ppm, then open the outer door of the transition chamber 2, put the parts to be heat treated in the transition chamber 2 and close the outer door. In order to prevent the oxygen and moisture in the transition box from entering the assembly box 3 and causing an impact, evacuate the transition chamber, monitor the vacuum degree in the chamber and inject inert gas into the chamber after it reaches 50Pa. Repeat 3 times, and if the vacuum degree is not reached each time, an alarm will be issued and the next step of operation will be stopped. Then open the door of the transition chamber from the glove port of the assembly box 3, take out the parts and put them in the transition chamber 4 on the right. Next, prepare to open the front furnace door 18. Before opening the furnace door, the system monitors whether the vacuum degree in the heat treatment furnace reaches 1×10 -5Pa, if it is not reached, start the vacuum pump group to evacuate the furnace. After the required vacuum degree is reached, high-purity argon gas is automatically injected into the furnace until the pressure reaches equilibrium with that in the transition box. At this time, use the glove port of the transition box to open the front furnace door 18 of the heat treatment furnace, drag out the tray 12, place the parts to be processed on the tray 12, and push them into the heat treatment furnace 1 together. Close and lock the rear furnace door, evacuate the furnace first, and if the vacuum degree of the furnace body fails to reach 1×10 -3 Pa, the furnace door is not locked, stop vacuuming, re-lock the furnace door and then proceed with the vacuuming process. After confirming that there is no problem with the furnace door seal, wait until the vacuum degree reaches 1×10 -5 Pa, the system works according to the set heat treatment temperature curve. After the work is completed, the high-purity argon valve is automatically opened after the temperature in the furnace body drops to room temperature. After monitoring the pressure balance between the heat treatment furnace and the transition box, the furnace door is opened, and the pallet is dragged out by using a hook or directly reaching into the furnace. Take out the parts and move them to the assembly box. Liquid metal is applied and bearings are assembled in the assembly box. Finally, the assembled liquid metal bearing is placed in the transition chamber and taken out from the outside.

Claims

1. A device for heat treatment and assembly of liquid metal bearings, comprising a heat treatment furnace (1), a transition chamber (2), an assembly box (3) and a transition box (4), characterized in that: The inlet and outlet ends of the heat treatment furnace (1) are sealedly connected to the first inlet and outlet ends of the transition box (4), the second inlet and outlet ends of the transition box (4) are sealedly connected to the first inlet and outlet ends of the assembly box (3), and the second inlet and outlet ends of the assembly box (3) are sealedly connected to the first inlet and outlet ends of the transition cabin (2); the front end surface of the assembly box (3) is provided with an assembly box glove interface (6), and the assembly box glove interface (6) is connected to operating gloves; the second inlet and outlet ends of the transition cabin (2) are provided with a transition cabin outer door (5), and the first inlet and outlet end of the transition cabin (2) is provided with a transition cabin inner door; the front end surface of the transition box (4) is provided with a transition box glove interface (7), and the transition box glove interface (7) is connected to operating gloves; the right side surface of the transition box (4) is provided with a side glove interface, and the side glove interface is connected to operating gloves; a gas circulation purification system is provided between the assembly box (3) and the transition box (4), and the air in the assembly box (3) and the transition box (4) is purified by the gas circulation purification system.

2. The device for heat treatment and assembly of liquid metal bearings according to claim 1, characterized in that: The transition chamber (2) is provided with a vacuum extraction interface, the vacuum extraction interface is connected to an external vacuum extraction device via a vacuum extraction pipeline, and the vacuum extraction device can evacuate the transition chamber (2) via the vacuum extraction interface. The transition chamber (2) is provided with an air intake interface, the air intake interface is connected to an air intake pipe, and the air intake pipe is connected to an external air supply device, and the air supply device can inject inert gas into the transition chamber (2) via the air intake interface. A vacuum sensor is also provided in the transition chamber (2), and the vacuum sensor can detect the vacuum degree in the transition chamber (2).

3. The device for heat treatment and assembly of liquid metal bearings according to claim 1, characterized in that: A cleaning window is arranged on the side wall of the assembly box (3), a box cover (8) is arranged on the cleaning window, one end of the box cover (8) is hinged on the upper side of the cleaning window, the left and right sides of the box cover (8) are connected to the left and right sides of the cleaning window through gas struts (9), the assembly box glove interface (6) is arranged on the box cover (8), and a sealing ring is arranged on the edge of the box cover (8), and the sealing ring can realize a sealed connection between the box cover (8) and the cleaning window.

4. The device for heat treatment and assembly of liquid metal bearings according to claim 1, characterized in that: The gas circulation purification system comprises a first activated carbon filter element (31) arranged in an assembly box (3) and a second activated carbon filter element (32) arranged in a transition box (4); the gas outlet of the second activated carbon filter element (32) is connected to the gas inlet end of the fan (11) through a pipeline; the gas outlet end of the fan (11) is connected to the gas inlet end of the purification barrel (10); the gas outlet end of the purification barrel (10) is connected to the gas inlet end of the first activated carbon filter element (31) through a pipeline; the fan (11) and the purification barrel (10) are arranged outside the transition box (4) and the assembly box (3); a copper catalyst and a molecular sieve are arranged in the purification barrel (10); the copper catalyst is used to absorb water in the air; the molecular sieve is used to screen out oxygen molecules; a water and oxygen sensor (33) is arranged in the transition box (4); the water and oxygen content in the transition box (4) is detected by the water and oxygen sensor (33).

5. The device for heat treatment and assembly of liquid metal bearings according to claim 1, characterized in that: The heat treatment furnace (1) comprises a furnace body (16), a reflection screen assembly (19) is arranged in the furnace body (16), a heater (23) is connected to the reflection screen assembly (19), the upper part of the furnace body (16) is connected to three electrode assemblies (24), the rear end of the furnace body (16) is connected to a rear furnace door (17) via a hinge, the rear furnace door (17) and the furnace body (16) are locked by a plurality of manual quick clamps, an observation window is arranged on the rear furnace door (17), and a vacuum gate valve (30) is connected to the vacuum interface of the furnace body (16), and the vacuum gate valve (30) can control the on and off of the vacuum interface of the furnace body (16).

6. The device for heat treatment and assembly of liquid metal bearings according to claim 5, characterized in that: The reflective screen assembly (19) is a multi-layer structure. The reflective screen assembly (19) has six layers in total. The innermost three layers of the reflective screen assembly (19) are made of molybdenum sheet, and the remaining three layers are made of ordinary stainless steel plate material.

7. The device for heat treatment and assembly of liquid metal bearings according to claim 5, characterized in that: A furnace bed (14) is arranged in the furnace body (16), the furnace bed (14) is located in the reflection screen assembly (19), a plurality of rollers (15) are arranged on the furnace bed (14) along the length direction, a tray (12) is placed on the furnace bed (14), the tray (12) can move smoothly through the rollers (15), the tray (12) is used to carry parts to be heat treated, and a handle (13) is welded to the front side of the tray (12) facing the furnace body (16).

8. The device for heat treatment and assembly of liquid metal bearings according to claim 5, characterized in that: A cooling water trough (20) is arranged in the wall of the furnace body (16), a cooling water inlet (21) is arranged at the lower rear portion of the furnace body (16), the cooling water inlet (21) is connected to the cooling water trough (20), and a cooling water outlet (22) is arranged at the upper front portion of the furnace body (16), the cooling water outlet (22) is connected to the cooling water trough (20).

9. The device for heat treatment and assembly of liquid metal bearings according to claim 5, characterized in that: The front end of the furnace body (16) is connected to the furnace body front wall (25), a material inlet and outlet are arranged on the furnace body front wall (25), a front furnace door (18) is arranged on the material inlet and outlet, a furnace wall cold water trough (26) is arranged in the furnace body front wall (25), a furnace wall water inlet (27) is arranged at the lower part of the furnace body front wall (25), the furnace wall water inlet (27) and the furnace wall cold water trough (26) are connected, and a furnace wall water outlet (28) is arranged at the upper part of the furnace body front wall (25), the furnace wall water outlet (28) and the furnace wall cold water trough (26) are connected.

10. The device for heat treatment and assembly of liquid metal bearings according to claim 9, characterized in that: A furnace door cold water trough (29) is arranged in the front furnace door (18), a furnace door water inlet and a furnace door water outlet are arranged on the front furnace door (18), and the furnace door cold water trough (29) is respectively connected to the furnace door water inlet and the furnace door water outlet.

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