Superconducting induction heating vacuum clamping device

Abstract

The invention discloses a superconducting induction heating vacuum clamping device, which belongs to the technical field of superconducting induction heating and comprises a driving assembly, a vacuum container, a jacking assembly and a bar. The whole vacuum container is made of austenitic stainless steel and is in a cuboid shape, the left and right sides are in the length direction, and the front and back are in the thickness direction. The driving assembly and the jacking assembly are installed on the left side and the right side of the vacuum container. The bar is installed in the vacuum container, the axis of the bar is parallel to the left-right direction of the vacuum container, and the bar, the driving assembly and the jacking assembly are coaxially installed. The magnetic field is perpendicular to the axis of the bar. According to the superconducting induction heating vacuum clamping device, stable positioning and efficient thermal isolation of a workpiece in a vacuum environment can be achieved, convection and thermal radiation losses of a blank are effectively reduced, the oxidation risk of the surface of the workpiece is reduced, and meanwhile the heating efficiency and the temperature field uniformity are remarkably improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of superconducting induction heating, and particularly relates to a superconducting induction heating vacuum clamping device. BACKGROUND

[0002] At present, the energy efficiency of a traditional induction heater in the application in the metal and related industries is generally low, being only 50%-60%. The superconducting induction heating technology uses a uniform magnetic field generated by a superconducting magnet to heat a rotating metal blank, and the system energy efficiency can reach 80%-90%, significantly improving the energy utilization rate of electromagnetic heating. The existing superconducting induction heating technology mostly adopts an open structure, resulting in serious heat loss during the heating of a rod. How to realize stable positioning and efficient thermal isolation of a workpiece in a vacuum environment, effectively reduce the convection and thermal radiation loss of a blank, reduce the risk of oxidation of the surface of the workpiece, and improve the heating efficiency and temperature field uniformity is a technical problem to be solved. SUMMARY

[0003] To solve the above technical problems, the application adopts the following technical solutions:

[0004] A superconducting induction heating vacuum clamping device, comprising: a driving assembly, a vacuum container, a jacking assembly and a rod; the vacuum container is made of austenitic stainless steel material and has a cuboid shape, the left and right sides are the length direction, and the front and back are the thickness direction; the driving assembly and the jacking assembly are installed on the left and right sides of the vacuum container; the rod is installed inside the vacuum container, the axis of the rod is parallel to the left and right directions of the vacuum container, and the driving assembly and the jacking assembly are coaxially installed; the magnetic field is perpendicular to the axis of the rod.

[0005] The application has the following beneficial effects:

[0006] The rod is placed inside the vacuum container, which can reduce the convective heat transfer during the high-speed rotation of the rod during heating, and improve the heating efficiency. The inner support plate is welded inside the cavity of the vacuum container, which can increase the stiffness of the cavity of the vacuum container, prevent the cavity from being unstable, and at the same time, the cavity and the inner support plate are mirror treated, which can improve the reflection coefficient of the cavity and the inner support plate, reduce the radiation heat loss of the rod, and improve the heating efficiency.

[0007] The superconducting induction heating vacuum clamping device can realize stable positioning and efficient thermal isolation of a workpiece in a vacuum environment, effectively reduce the convection and thermal radiation loss of a blank, reduce the risk of oxidation of the surface of the workpiece, and significantly improve the heating efficiency and temperature field uniformity. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1It is the front view of the superconducting induction heating vacuum clamping device of the application, wherein, I-drive assembly, II-vacuum container, III-tight assembly, 1-vacuum container bottom plate, 2-vacuum container cavity, 6-water cooling coil, 7-motor, 8-coupling, 9-rotary seal, 15-cylinder, 16-cylinder rack, 21-motor rack;

[0009] Figure 2 It is the partial sectional view of the superconducting induction heating vacuum clamping device of the application, wherein, 1-vacuum container bottom plate, 3-coil, 4-magnetic strip, 5-inner support plate, 6-water cooling coil, 9-rotary seal, 10-left side bearing seat, 11-ceramic bearing, 12-left side drive shaft, 13-right side bearing seat, 14-right side driven shaft, 15-cylinder, 17-right side sealing flange, 18-bellow, 19-right side tight flange, 20-rod, 22-guide shaft;

[0010] Figure 3 It is the axonometric bottom view of the superconducting induction heating vacuum clamping device of the application, wherein, 1-vacuum container bottom plate, 2-vacuum container cavity, 3-coil, 6-water cooling coil;

[0011] Figure 4 It is the axonometric top view of the superconducting induction heating vacuum clamping device of the application, wherein, 1-vacuum container bottom plate, 2-vacuum container cavity, 4-magnetic strip, 6-water cooling coil, 15-cylinder, 17-right side sealing flange. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and are not used to limit the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0013] As shown in Figure 1 , Figure 2 , the superconducting induction heating vacuum clamping device of the present application comprises a drive assembly I, a vacuum container II, a tight assembly III and a rod 20; the vacuum container II is made of austenitic stainless steel material and has a cuboid shape, the left and right sides are length direction, the front and back are thickness direction, the axis of the rod 20 is parallel to the length direction, and the magnetic field is perpendicular to the axis of the rod 20; the drive assembly I and the tight assembly III are installed on the left and right sides of the vacuum container II; the rod 20 is installed inside the vacuum container II, and its axis is parallel to the left and right direction of the vacuum container II and coaxially installed with the drive assembly I and the tight assembly III.

[0014] As shown in Figure 2 , Figure 3As shown, the vacuum container II includes a vacuum container bottom plate 1, a vacuum container cavity 2, a coil 3, a magnetic strip 4, an inner support plate 5, and a water cooling coil 6. The water cooling coil 6 is welded to the top surface of the vacuum container cavity 2 around the periphery, and is used to cool the vacuum container II. The water cooling coil 6 is made of austenitic stainless steel. A flange is formed below the vacuum container cavity 2, and the magnetic strip 4 is mounted on the upper surface of the flange. The magnetic strip 4 is connected to the vacuum container cavity 2 by bolts. The inner support plate 5 is welded to the left and right sides inside the vacuum container cavity 2. The inner support plate 5 and all surfaces of the vacuum container cavity 2 are mirror finished, which is used to increase the reflection coefficient and reduce the radiation heat transfer from the bar 20 to the vacuum container II. The vacuum container bottom plate 1 is installed below the vacuum container cavity 2 and can slide left and right along the vacuum container cavity 2. A sealing groove is formed on the contact surface (the upper surface of the vacuum container bottom plate 1) between the vacuum container bottom plate 1 and the vacuum container cavity 2. A sealing ring made of high-temperature-resistant fluororubber is arranged in the sealing groove, which is used to seal the vacuum container cavity 2. The coil 3 is installed in the groove on the lower surface of the vacuum container bottom plate 1. When the coil 3 is energized, a magnetic field is generated to attract the magnetic strip 4, so as to compress the sealing ring. The water cooling coil 6 welded to the lower surface of the vacuum container bottom plate 1 is used to cool the vacuum container bottom plate 1.

[0015] As shown in Figure 1 , Figure 2 , the drive assembly I includes a motor 7, a shaft coupling 8, a rotary seal 9, a left bearing seat 10, a ceramic bearing 11, a left drive shaft 12, a right bearing seat 13, a right driven shaft 14, a motor rack 21, and a guide shaft 22. The motor 7 is mounted on the motor rack 21 on the left side of the vacuum container II by bolts. The shaft coupling 8 is mounted on the right side of the motor 7. The two are connected by a key, a spline, or a profile. The right side of the shaft coupling 8 is connected to the drive shaft of the rotary seal 9 by a key, a spline, or a profile. The rotary seal 9 is connected to the left end surface of the vacuum container cavity 2 by bolts. A sealing ring is arranged between the two. The right end of the rotary seal 9 is located inside the vacuum container cavity 2 and is connected to the left drive shaft 12 by a profile. The left drive shaft 12 is made of silicon nitride and is arranged on the left side of the bar 20. The end contacting the bar 20 is laser etched to increase the friction of the contact surface. The ceramic bearing 11 is installed on the outside of the left drive shaft 12 and is used for axial positioning. The ceramic bearing 11 is installed inside the left bearing seat 10 and is coaxial with the left bearing seat 10. The right bearing seat 13 is coaxial with the left bearing seat 10. The right bearing seat 13 is slidingly connected to the guide shaft 22 welded to the right inner surface of the vacuum container cavity 2, so as to realize the left and right movement of the right bearing seat 13. The right driven shaft 14 is arranged on the right side of the bar 20 and is also made of silicon nitride. The end contacting the bar 20 is laser etched. The right driven shaft 14 is coaxially installed with the ceramic bearing 11. The ceramic bearing 11 is installed inside the right bearing seat 13 and is arranged coaxially with the right bearing seat 13.

[0016] As Figure 2 、 Figure 4 shown, the top tight assembly III includes: right side sealing flange 17, corrugated pipe 18, right side top tight flange 19, cylinder 15, cylinder rack 16. The right side sealing flange 17 is coaxially installed with the corrugated pipe 18, the right side top tight flange 19, the right side bearing seat 13 and the cylinder 15, and the corrugated pipe 18 is welded with the right side sealing flange 17 and the right side top tight flange 19 on both sides respectively; the right side sealing flange 17 is sealingly connected with the right side of the vacuum container cavity 2 through bolts, and the right side top tight flange 19 is in point contact with the right side bearing seat 13 inside the vacuum container cavity 2; the cylinder 15 is fixed on the cylinder rack 16 on the right side of the vacuum container cavity 2, and the piston rod of the cylinder is located on the left side and is fixed with the right side top tight flange 19 through bolts, and the piston of the cylinder 15 drives the right side top tight flange 19 to move left and right.

[0017] In use, the mechanical arm clamps the bar 20 placed between the left drive shaft 12 and the right driven shaft 14, and is coaxial with the left drive shaft 12 and the right driven shaft 14, the piston rod of the cylinder 15 extends to the left to drive the right bearing seat 13 to move to the left, and the bar 20 is tightly pressed, and then the mechanical arm pushes the vacuum container bottom plate 1 to the right to the predetermined position, the coil 3 is energized to generate electromagnetic attraction between the coil 3 and the magnetic strip 4 to press the sealing ring to realize cavity sealing. Finally, the space inside the vacuum container cavity 2 is pumped to vacuum, the motor 7 is started to drive the bar 20 to rotate to realize electromagnetic heating of the bar 20. After the bar 20 is heated, inert gas is introduced into the vacuum container II to destroy the vacuum, and the current of the coil 3 is turned off, the mechanical arm pushes the vacuum container bottom plate 1 to the left, and then the mechanical arm clamps the bar 20, and the piston rod of the cylinder 15 moves to the right to realize disassembly of the bar 20.

[0018] The above only describes the embodiments of the present application, and does not limit the scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related system fields, is also included in the protection scope of the present application. The contents not described in detail in the specification of the present application are the prior art known to those skilled in the art.

Claims

1. A superconducting induction heating vacuum clamping device, characterized in that, include: The components include a drive assembly, a vacuum container, a clamping assembly, and a rod. The vacuum container is made entirely of austenitic stainless steel and is rectangular in shape, with the left and right sides representing the length direction and the front and back representing the thickness direction. The drive assembly and the clamping assembly are installed on the left and right sides of the vacuum container. The rod is installed inside the vacuum container, with its axis parallel to the left and right direction of the vacuum container and coaxially mounted with the drive assembly and the clamping assembly. The magnetic field is perpendicular to the axis of the rod.

2. The superconducting induction heating vacuum clamping device according to claim 1, characterized in that, The vacuum container includes a vacuum container base plate, a vacuum container cavity, a coil, a magnetic strip, an inner support plate, and water-cooling coils. Water-cooling coils are welded to the four sides and top surface of the vacuum container cavity for cooling. A flange is machined at the bottom of the vacuum container cavity, and a magnetic strip is installed on the upper surface of the flange, connecting to the vacuum container cavity. Inner support plates are welded to the left and right sides inside the vacuum container cavity. The vacuum container base plate is installed below the vacuum container cavity and slides left and right along the cavity; a sealing groove is machined on its contact surface with the cavity. A sealing ring is installed in the sealing groove. A coil is installed in a groove on the lower surface of the base plate; when energized, the coil generates a magnetic field that attracts the magnetic strip.

3. The superconducting induction heating vacuum clamping device according to claim 2, characterized in that, The water-cooling coils are made of austenitic stainless steel.

4. The superconducting induction heating vacuum clamping device according to claim 2, characterized in that, The magnetic strip is connected to the vacuum container cavity by bolts.

5. The superconducting induction heating vacuum clamping device according to claim 2, characterized in that, All surfaces of the inner support plate and the vacuum container cavity are mirror-finished to increase the reflection coefficient and reduce radiative heat transfer from the rods to the vacuum container.

6. The superconducting induction heating vacuum clamping device according to claim 2, characterized in that, The sealing ring is made of high-temperature resistant fluororubber and is used to seal the cavity of the vacuum container.

7. The superconducting induction heating vacuum clamping device according to claim 2, characterized in that, The drive assembly includes: a motor, coupling, rotary seal, left bearing housing, ceramic bearing, left drive shaft, right bearing housing, right driven shaft, and motor stand; The motor is bolted to the motor stand on the left side of the vacuum container; the rotary seal is bolted to the left end face of the vacuum container cavity, and a sealing ring is installed between them; the right shaft end of the rotary seal is located inside the vacuum container cavity and is fixed to the left drive shaft through a profile connection; the left drive shaft is located on the left side of the rod, and the end in contact with the rod is laser-etched to increase the friction of the contact surface. A ceramic bearing is installed on the outside of the left drive shaft for axial positioning; the ceramic bearing is installed inside the left bearing housing and is coaxial with it; the right bearing housing is coaxial with the left bearing housing, and the right bearing housing is slidably connected to the guide shaft welded to the right inner surface of the vacuum container cavity to realize the left and right movement of the right bearing housing; the right driven shaft is located on the right side of the rod, and the end in contact with the rod is laser-etched and is coaxially installed with the ceramic bearing. The ceramic bearing is installed inside the right bearing housing and is coaxially arranged with the right bearing housing.

8. The superconducting induction heating vacuum clamping device according to claim 7, characterized in that, The motor and coupling are connected by a key, spline, or profile; the right side of the coupling is connected to the drive shaft of the rotary seal by a key, spline, or profile.

9. The superconducting induction heating vacuum clamping device according to claim 7, characterized in that, Both the left drive shaft and the right driven shaft are made of silicon nitride.

10. The superconducting induction heating vacuum clamping device according to claim 1, characterized in that, The clamping assembly includes: a right-side sealing flange, a bellows, a right-side clamping flange, a cylinder, and a cylinder stand; the right-side sealing flange is coaxially mounted with the bellows, the right-side clamping flange, the right-side bearing seat, and the cylinder; the right-side sealing flange and the right-side clamping flange are welded to both sides of the bellows; the right-side sealing flange is sealed to the right side of the vacuum container cavity; the right-side clamping flange is placed inside the vacuum container cavity and makes point contact with the right-side bearing seat; the cylinder is fixed on the cylinder stand on the right side of the vacuum container cavity, and the piston rod of the cylinder is located on the left side and is fixed to the right-side clamping flange by bolts; the cylinder piston drives the right-side clamping flange to move left and right.

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