Heat treatment device and method for large rotor

Abstract

The invention discloses a heat treatment device and method for a large rotor, and belongs to the field of rotor heat treatment. A heat treatment device for a large rotor comprises a bottom plate and a heat treatment furnace arranged on the bottom plate, and further comprises a placement plate arranged on the bottom plate, a groove is formed in the placement plate, sizing blocks are symmetrically and slidably connected to the interior of the groove, and telescopic rods connected with the sizing blocks are fixedly connected to the interior of the placement plate; the driving motor is arranged on the side, away from the groove, of the containing plate, the interior of the groove is rotationally connected with an adjusting piece connected with the output end of the driving motor, and a driving bevel gear set is arranged on the adjusting piece; the problems that in the heat treatment process of the rotor, deformation is prone to occurring, the size stability and the mechanical property are poor, and the rotor is prone to adhering to the sizing block can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of rotor heat treatment, and particularly to a heat treatment device and method for a large rotor. Background Art

[0002] With the rapid development of the major equipment manufacturing industry, the requirements for the quality of large forgings have gradually increased. Among them, large rotor forgings are the core components of various large equipment, not only with high technical content, but also with great production difficulty and long processing cycle. During the rotor heat treatment process, not only thermal stress but also tissue stress will be encountered. Under the combined action of these two forces, complex and variable effects will be formed, thus affecting the stability of rotor heat treatment.

[0003] At present, when heat-treating large rotors, the rotor is usually placed on a special bolster for heat treatment. In this way, although the contact area of the rotor during the heat treatment process can be reduced and the effective heating surface of the forging can be increased; however, during the heat treatment process, the rotor always remains stationary, the contact area between the bolster and the rotor is limited, and deformation is likely to occur, and the heating speed of the contact surface is relatively slow, affecting the dimensional stability and mechanical properties of the rotor; in addition, after long-term heat treatment of the rotor, due to oxidation, diffusion, and surface energy (the energy per unit area of the rotor surface), etc., it will adhere to the bolster, affecting the heat treatment quality and performance of the rotor. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the prior art that during the rotor heat treatment process, deformation is likely to occur, the dimensional stability and mechanical properties are not good, and adhesion to the bolster is likely to occur, and to propose a heat treatment device and method for a large rotor.

[0005] In order to achieve the above purpose, the present invention adopts the following technical scheme:

[0006] A heat treatment device for a large rotor, including a bottom plate and a heat treatment furnace arranged on the bottom plate, further including: a placing plate arranged on the bottom plate, a groove is opened on the placing plate, two bolster are symmetrically and slidably connected inside the groove, a telescopic rod connected to the bolster is fixedly connected inside the placing plate; a driving motor arranged on one side of the placing plate away from the groove, an adjusting member connected to the output end of the driving motor is rotatably connected inside the groove, and a driving bevel gear set is arranged on the adjusting member; a distance adjusting mechanism arranged between the two bolster, which can adjust the distance between the two bolster through the driving bevel gear set; a plurality of second worms arranged in the groove, a supporting member is arranged on the second worm, and the supporting member and the telescopic rod are communicated with the adjusting member through a pipeline, used to adjust the distance between the driving bevel gear set and the distance adjusting mechanism, wherein, a driving gear and a driven gear that mesh with each other are fixedly connected to the adjusting member and the second worm.

[0007] To facilitate the adjustment of the position of the driving bevel gear set, preferably, the adjusting member includes a fixed cylinder connected to the output end of the driving motor. A piston is slidably connected inside the fixed cylinder. One side of the piston away from the driving motor is fixedly connected with a movable rod. A positioning strip slidably connected to the fixed cylinder is slidably connected to the movable rod. Among them, the driving bevel gear set is symmetrically and fixedly connected to the movable rod, and the movable rod is slidably connected with the fixed cylinder.

[0008] To facilitate the automatic control of the position of the driving bevel gear set according to the initial position of the shim, further, it also includes a feed channel opened on the side wall of the fixed cylinder. The feed channel is in a tee shape, and two ends of which are respectively communicated with the upper and lower parts inside the fixed cylinder. The side of the fixed cylinder close to the feed channel is symmetrically provided with sealing grooves. Sliders are slidably connected inside the sealing grooves. Through holes are opened on the sliders. A first spring is fixedly connected between one group of the sliders and the sealing grooves. A connecting channel is communicated between the two groups of sealing grooves. The sealing grooves and the telescopic rod are connected through a pipeline.

[0009] To facilitate the adjustment of the distance between the two shims, preferably, the distance adjusting mechanism includes a connecting rod hinged on the side wall of the shim. A connecting block is hinged between two groups of the connecting rods on the same side. A first worm threadedly connected with the connecting block is rotatably connected to the placing plate. Driven bevel gears are fixedly connected to the sides of the first worms close to each other. The driven bevel gears are meshed with the driving bevel gear set.

[0010] To avoid the situation of adhesion between the rotor and the shim, further, the supporting member includes a base arranged on the second worm. A supporting seat is slidably connected to the base. A compression rod and a second spring are fixedly connected between the supporting seat and the base. Among them, the second spring is sleeved outside the compression rod. The compression rod and the feed channel are connected through a pipeline. The base is threadedly connected with the second worm. A hole matching the second worm is opened on the supporting seat. A positioning rod slidably connected to the base is fixedly connected to the placing plate.

[0011] To ensure the uniformity of the heating speed on the surface of the rotor, furthermore, it also includes a guide wheel rotatably connected to the supporting seat. An installation cavity is opened on one side of the supporting seat close to the shaft end of the guide wheel. An adjusting gear is fixedly connected to one side of the shaft end of the guide wheel close to the installation cavity. An installation cylinder is fixedly connected to one side of the base close to the installation cavity. A toothed plate meshed with the adjusting gear is slidably connected inside the installation cylinder. A third spring is fixedly connected between the toothed plate and the installation cylinder.

[0012] For the convenience of transporting the rotor, preferably, a plurality of electric guide rails are fixedly connected to the bottom plate, an electrically matching sliding rail is fixedly connected to one side of the placement plate close to the electric guide rail, a limiting strip is fixedly connected to the inner wall of the heat treatment furnace, and a limiting groove matching the limiting strip is formed in the side wall of the placement plate.

[0013] For the convenience of opening and closing the heat treatment furnace, preferably, an installation frame and a servo motor are fixedly connected to the top of the heat treatment furnace, a rotating shaft is rotatably connected to the installation frame, a linkage assembly is arranged between the servo motor and the rotating shaft, a plurality of winding discs are fixedly connected to the rotating shaft, positioning rails are symmetrically and fixedly connected to the heat treatment furnace, a sealing door is slidably connected between the two positioning rails, and a cable is connected between the sealing door and the winding disc.

[0014] To ensure the tightness of the rotor during the heat treatment process, further, a sealing member fixedly connected to the placement plate is also included. When the sealing member moves below the positioning rail, the sealing member is in close fit with the positioning rail and the side wall of the heat treatment furnace, and a groove matching the sealing door is formed in the sealing member.

[0015] A heat treatment method for a large rotor includes the following steps:

[0016] Step 1: Place the rotor on the pad iron through a hoisting device, transport the rotor into the heat treatment furnace, and close the heat treatment furnace. Subsequently, the rotor can be heat-treated.

[0017] Step 2: During the heat treatment process, start the driving motor according to the heat treatment time, lift the rotor through the support member, and drive the rotor to rotate after lifting.

[0018] Step 3: Subsequently, automatically adjust the position of the pad iron according to the initial position of the pad iron to reduce the stress concentration during the heat treatment of the rotor.

[0019] Step 4: After the heat treatment of the rotor is completed, open the heat treatment furnace and take out the rotor to complete the heat treatment of the rotor.

[0020] Compared with the prior art, the present invention provides a heat treatment device and method for a large rotor, having the following beneficial effects:

[0021] 1. For this heat treatment device for a large rotor, the driving motor can drive the adjusting member to rotate, and according to the initial position of the pad iron, adjust the relative position between the driving bevel gear set on the adjusting member and the distance adjusting mechanism, so as to adjust the moving direction of the pad iron, making the force on the rotor more uniform during the heat treatment process, thereby reducing the deformation of the rotor during the heat treatment process and ensuring the stability of the rotor during the heat treatment process.

[0022] 2. The heat treatment device for the large rotor can drive the second worm to rotate through the adjusting member, drive the supporting member to lift the rotor, and after lifting, drive the rotor to rotate self - sufficiently. On the one hand, it can switch the contact surface between the rotor and the sole plate to ensure the uniformity of the overall temperature of the rotor. On the other hand, it can avoid the long - term contact between the rotor and the sole plate, thus avoiding the adhesion between the rotor and the sole plate, and further improving the quality and performance of the rotor heat treatment.

[0023] 3. The heat treatment device for the large rotor can realize the rapid loading and unloading of the rotor through the electric guide rail and the electric slide rail, which is also convenient for placing the rotor by using the lifting equipment. In addition, the sealing door and the sealing member can ensure the sealing performance of the rotor during the heat treatment process, reducing the oxide scale generated on the surface of the rotor during the heat treatment process.

[0024] The parts not involved in this device are the same as or can be implemented by the prior art. The present invention can overcome the problems that are prone to occur during the rotor heat treatment process, such as deformation, poor dimensional stability and mechanical properties, and easy adhesion with the sole plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of a heat treatment device for a large rotor proposed by the present invention;

[0026] Figure 2 It is a partial structural schematic diagram of a heat treatment device for a large rotor proposed by the present invention;

[0027] Figure 3 It is a schematic diagram of the bottom structure of the placing plate in a heat treatment device for a large rotor proposed by the present invention;

[0028] Figure 4 It is a schematic diagram of the top structure of the placing plate in a heat treatment device for a large rotor proposed by the present invention;

[0029] Figure 5 It is a schematic diagram of the side - view sectional structure of the placing plate in a heat treatment device for a large rotor proposed by the present invention;

[0030] Figure 6 It is a schematic diagram of the front - view sectional structure of the placing plate in a heat treatment device for a large rotor proposed by the present invention;

[0031] Figure 7 It is a partial sectional structural schematic diagram of the adjusting member in a heat treatment device for a large rotor proposed by the present invention;

[0032] Figure 8 It is a sectional structural schematic diagram of the supporting member in a heat treatment device for a large rotor proposed by the present invention;

[0033] Figure 9A heat treatment device for a large rotor proposed by the present invention Figure 5 Schematic structural diagram of part A in

[0034] Figure 10 A heat treatment device for a large rotor proposed by the present invention Figure 7 Schematic structural diagram of part B in

[0035] In the figure: 1, bottom plate; 2, heat treatment furnace; 3, electric guide rail; 4, placing plate; 5, electric slide rail; 6, limiting groove; 7, limiting strip; 8, mounting frame; 9, servo motor; 10, rotating shaft; 11, linkage assembly; 12, winding reel; 13, positioning rail; 14, sealing door; 15, cable; 16, seal; 17, groove; 18, shim; 19, telescopic rod; 20, connecting rod; 21, connecting block; 22, first worm; 23, driving motor; 24, adjusting member; 241, fixed cylinder; 242, piston; 243, movable rod; 244, positioning strip; 245, feeding channel; 246, sealing groove; 247, slider; 248, through hole; 249, first spring; 2410, connecting channel; 25, driving bevel gear set; 26, driven bevel gear; 27, second worm; 28, driving gear; 29, driven gear; 30, support member; 301, base; 302, support seat; 303, compression rod; 304, second spring; 305, guide wheel; 306, installation cavity; 307, adjusting gear; 308, installation cylinder; 309, toothed plate; 310, third spring; 31, positioning rod. Specific embodiments

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0038] Embodiment 1:

[0039] Refer to Figures 1 - 10, A heat treatment device for a large rotor, comprising a bottom plate 1 and a heat treatment furnace 2 arranged on the bottom plate 1, and further comprising: a placement plate 4 arranged on the bottom plate 1, a groove 17 is formed on the placement plate 4, the inside of the groove 17 is symmetrically and slidably connected with cushion blocks 18, and a telescopic rod 19 connected to the cushion blocks 18 is fixedly connected inside the placement plate 4; a driving motor 23 arranged on the side of the placement plate 4 away from the groove 17, an adjusting member 24 rotatably connected inside the groove 17 and connected to the output end of the driving motor 23, and a driving bevel gear set 25 is arranged on the adjusting member 24; a distance adjusting mechanism arranged between the two cushion blocks 18, capable of adjusting the distance between the two cushion blocks 18 through the driving bevel gear set 25; a plurality of second worm gears 27 arranged in the groove 17, a support member 30 is arranged on the second worm gear 27, and the support member 30 and the telescopic rod 19 are connected to the adjusting member 24 through a pipeline, for adjusting the distance between the driving bevel gear set 25 and the distance adjusting mechanism. Among them, driving gears 28 and driven gears 29 that mesh with each other are fixedly connected to the adjusting member 24 and the second worm gear 27.

[0040] It should be noted that structures such as the bottom plate 1, the heat treatment furnace 2, the placement plate 4, and the sealing door 14 in this application are all made of heat insulation materials to prevent heat from dissipating to the outside during the heat treatment of the rotor. On the one hand, it can reduce energy loss, and on the other hand, it can prevent heat from damaging other equipment. And the structures on the placement plate 4 are all made of high-temperature resistant materials to avoid serious deformation and other situations during the heat treatment of the rotor. The hydraulic oil is made of materials with high temperature resistance and small thermal expansion coefficient.

[0041] Refer to Figures 5 - 7 , The adjusting member 24 includes a fixed cylinder 241 connected to the output end of the driving motor 23. A piston 242 is slidably connected inside the fixed cylinder 241. A movable rod 243 is fixedly connected to the side of the piston 242 away from the driving motor 23. A positioning bar 244 slidably connected to the movable rod 243 and slidably connected to the fixed cylinder 241 is arranged. Among them, the driving bevel gear set 25 is symmetrically and fixedly connected to the movable rod 243, and the movable rod 243 is slidably connected to the fixed cylinder 241.

[0042] After starting the driving motor 23, under the action of the positioning bar 244, it will drive the fixed cylinder 241 and the movable rod 243 to rotate synchronously, thereby driving the driving bevel gear set 25 to rotate. It should be noted that both sides of the piston 242 are in a sealed state with the fixed cylinder 241, and the position of the piston 242 inside the fixed cylinder 241 can be adjusted according to the pressure on both sides.

[0043] Refer to Figure 7 and Figure 10, it further includes a feed channel 245 opened on the side wall of the fixed cylinder 241. The feed channel 245 is in a tee shape, with both ends respectively communicating with the upper and lower parts inside the fixed cylinder 241. On one side of the fixed cylinder 241 close to the feed channel 245, sealing grooves 246 are symmetrically arranged. A slider 247 is slidably connected inside the sealing groove 246. A through hole 248 is opened on the slider 247. A first spring 249 is fixedly connected between one group of sliders 247 and the sealing groove 246. A connecting channel 2410 communicates between the two groups of sealing grooves 246. The sealing groove 246 and the telescopic rod 19 are connected through a pipeline.

[0044] Initially, according to the position of the shim 18, the telescopic rod 19 will be in a compressed or telescopic state accordingly, so as to adjust the pressure in one group of sealing grooves 246. Under the action of the connecting channel 2410, the relative position between the two groups of sliders 247 is adjusted. When the through hole 248 on one group of sliders 247 is located in the feed channel 245, the through hole 248 on the other group of sliders 247 is located in the sealing groove 246, that is, the hydraulic pressure can only be discharged from one end of the feed channel 245 inside the fixed cylinder 241 (above or below the piston 242) at the same time. Thus, the piston 242 drives the movable rod 243 to move, adjusting the distance between the driving bevel gear set 25 and the driven bevel gear 26, and thus adjusting the rotation direction of the driven bevel gear 26, that is, adjusting the moving direction of the shim 18.

[0045] Refer to Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 and Figure 6 , the distance adjustment mechanism includes a connecting rod 20 hinged on the side wall of the shim 18. A connecting block 21 is hinged between two groups of connecting rods 20 on the same side. A first worm 22 threadedly connected to the connecting block 21 is rotatably connected to the placing plate 4. Driven bevel gears 26 are fixedly connected to the mutually adjacent sides of the first worms 22. The driven bevel gears 26 are meshed with the driving bevel gear set 25.

[0046] When the driven bevel gear 26 rotates, it will drive the first worm 22 to rotate, thereby driving the connecting block 21 to move along the first worm 22. The position of the shim 18 is adjusted through the connecting rod 20. Among them, the connection method between the first worm 22 and the connecting block 21 is a conventional means in the prior art, so it will not be elaborated here.

[0047] Refer to Figure 4 、 Figure 5 、 Figure 6 、 Figure 8 and Figure 9, the support member 30 includes a base 301 provided on the second worm 27. A support seat 302 is slidably connected to the base 301. A compression rod 303 and a second spring 304 are fixedly connected between the support seat 302 and the base 301. Among them, the second spring 304 is sleeved outside the compression rod 303. The compression rod 303 is communicated with the feed channel 245 through a pipeline. The base 301 is threadedly connected to the second worm 27. A hole matching the second worm 27 is provided on the support seat 302. A positioning rod 31 slidably connected to the base 301 is fixedly connected to the placing plate 4.

[0048] When the fixed cylinder 241 rotates, it will drive the second worm 27 to rotate through the driving gear 28 and the driven gear 29, driving the base 301 and the support seat 302 to move toward the rotor side. When the support seat 302 contacts the surface of the rotor, it will first compress the compression rod 303 and convey the hydraulic pressure into the feed channel 245 until the rotor is lifted. During the lifting process, the driving bevel gear set 25 is engaged with the driven bevel gear 26 to adjust the position of the shim 18, so as to facilitate the subsequent support of different positions of the rotor by the shim 18.

[0049] Refer to Figure 8 , it further includes a guide wheel 305 rotatably connected to the support seat 302. An installation cavity 306 is provided on one side of the support seat 302 close to the shaft end of the guide wheel 305. An adjusting gear 307 is fixedly connected to one side of the shaft end of the guide wheel 305 close to the installation cavity 306. An installation cylinder 308 is fixedly connected to one side of the base 301 close to the installation cavity 306. A toothed plate 309 meshing with the adjusting gear 307 is slidably connected inside the installation cylinder 308. A third spring 310 is fixedly connected between the toothed plate 309 and the installation cylinder 308.

[0050] During the lifting process, the support seat 302 is received into the base 301. Initially, the rotor is not separated from the shim 18. The resistance received by the toothed plate 309 after contacting the adjusting gear 307 is relatively large, and then the pressure will be stored in the third spring 310. When the rotor is separated from the shim 18, the rotor is completely located on the guide wheel 305, that is, the received resistance is reduced, and the pressure stored in the third spring 310 is released, driving the adjusting gear 307 to rotate through the toothed plate 309, thereby driving the guide wheel 305 to rotate, and further driving the rotor to rotate self, adjusting the contact surface between the subsequent rotor and the shim 18, so that the rotor can be more evenly stressed during heat treatment.

[0051] Refer to Figures 1 - 4 , a plurality of electric guide rails 3 are fixedly connected to the bottom plate 1. An electrically matching slide rail 5 is fixedly connected to one side of the placing plate 4 close to the electric guide rail 3. A limiting strip 7 is fixedly connected to the inner wall of the heat treatment furnace 2. A limiting groove 6 matching the limiting strip 7 is provided on the side wall of the placing plate 4.

[0052] The electric guide rail 3 and the electric slide rail 5 can refer to the technical solutions in the prior art. Those skilled in the art can be aware of them and will not be elaborated here. Through the electric guide rail 3 and the electric slide rail 5, the placement plate 4 can be driven to move along the direction of the heat treatment furnace 2, so as to realize the loading and unloading of the rotor. The limit groove 6 and the limit strip 7 can improve the sealing performance of the heat treatment furnace 2 during operation.

[0053] Refer to Figures 1 - 4 , a mounting frame 8 and a servo motor 9 are fixedly connected to the top of the heat treatment furnace 2. A rotating shaft 10 is rotatably connected to the mounting frame 8. A linkage assembly 11 is arranged between the servo motor 9 and the rotating shaft 10. A plurality of winding discs 12 are fixedly connected to the rotating shaft 10. Positioning rails 13 are symmetrically and fixedly connected to the heat treatment furnace 2. A sealing door 14 is slidably connected between the two positioning rails 13. A cable 15 is connected between the sealing door 14 and the winding disc 12. A sealing member 16 fixedly connected to the placement plate 4 is further included. When the sealing member 16 moves below the positioning rail 13, the sealing member 16 is in close fit with the positioning rail 13 and the side wall of the heat treatment furnace 2, and a groove matching the sealing door 14 is formed on the sealing member 16.

[0054] It should be explained that the linkage assembly 11 can be realized by means of a belt and a pulley or a chain and a sprocket. This is a conventional means in the prior art and will not be elaborated here. When the servo motor 9 drives the rotating shaft 10 to rotate, the winding disc 12 can be driven to rotate, and the cable 15 can be wound and unwound. When winding, the sealing door 14 can be driven to move upward along the heat treatment furnace 2, so as to open the heat treatment furnace 2. When the cable 15 is unwound, the sealing door 14 moves downward under its own gravity to realize the closing of the heat treatment furnace 2.

[0055] Embodiment 2:

[0056] A heat treatment method for a large rotor includes the following steps:

[0057] Step 1: Place the rotor on the shim 18 through a hoisting device, transport the rotor to the inside of the heat treatment furnace 2, and close the heat treatment furnace 2. Then, the rotor can be heat-treated.

[0058] Initially, the placement plate 4 is located outside the heat treatment furnace 2. The hoisting device can better adjust the position of the rotor to ensure the accuracy of the rotor placement position.

[0059] Step 2: During the heat treatment process, start the drive motor 23 according to the heat treatment time, lift the rotor through the support member 30, and drive the rotor to rotate after lifting.

[0060] After the support member 30 lifts the rotor and disengages it from the chock 18, the rotor can be driven to rotate. After adjusting the placement direction of the rotor, it is possible to avoid the rotor always contacting the chock 18 in a single direction during the heat treatment process, thereby reducing the deformation of the rotor.

[0061] Step Three: Subsequently, according to the initial position of the chock 18, automatically adjust the position of the chock 18 to reduce the stress concentration during the heat treatment process of the rotor;

[0062] If the chock 18 is initially at the maximum distance position, turning on the drive motor 23 will drive the chocks 18 on both sides to move relative to each other. If the chock 18 is initially at a smaller distance position, the process is opposite to the above.

[0063] Step Four: After the heat treatment of the rotor is completed, turn on the heat treatment furnace 2 and take out the rotor to complete the heat treatment of the rotor.

[0064] As described above, only the specific preferred embodiments of the present invention are provided, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent replacements or changes should be covered within the protection scope of the present invention.

Claims

1. A heat treatment device for a large rotor, comprising a base plate (1) and a heat treatment furnace (2) arranged on the base plate (1), characterized in that: Also includes: A placement plate (4) is arranged on the bottom plate (1), the placement plate (4) is provided with a groove (17), a washer (18) is symmetrically slidably connected inside the groove (17), and a telescopic rod (19) connected to the washer (18) is fixedly connected inside the placement plate (4); A driving motor (23) is arranged on a side of the placement plate (4) away from the groove (17); an adjusting member (24) connected to an output end of the driving motor (23) is rotatably connected inside the groove (17); a driving bevel gear set (25) is arranged on the adjusting member (24); A distance adjustment mechanism is arranged between the two groups of washers (18), and can adjust the distance between the two groups of washers (18) by driving a bevel gear set (25); A plurality of groups of second worm gears (27) are arranged in the groove (17), and a support member (30) is arranged on the second worm gear (27). The support member (30) and the telescopic rod (19) are connected to the adjustment member (24) through a pipeline, and are used to adjust the distance between the driving bevel gear group (25) and the distance adjustment mechanism. The adjusting member (24) and the second worm (27) are fixedly connected with a driving gear (28) and a driven gear (29) which mesh with each other.

2. A heat treatment device for a large rotor according to claim 1, characterized in that: The regulating member (24) comprises a fixed cylinder (241) connected to the output end of the driving motor (23); a piston (242) is slidably connected inside the fixed cylinder (241); a movable rod (243) is fixedly connected to the side of the piston (242) away from the driving motor (23); a positioning bar (244) slidably connected to the fixed cylinder (241) is slidably connected to the movable rod (243); The driving bevel gear set (25) is symmetrically fixedly connected to the movable rod (243), and the movable rod (243) is slidably connected to the fixed cylinder (241).

3. A heat treatment device for a large rotor according to claim 2, characterized in that: The invention also comprises a feed channel (245) provided on the side wall of the fixed cylinder (241), wherein the feed channel (245) is in a three-way shape, wherein the two ends are respectively connected to the upper and lower parts of the interior of the fixed cylinder (241), and a sealing groove (246) is symmetrically provided on one side of the fixed cylinder (241) close to the feed channel (245), wherein a slider (247) is slidably connected to the interior of the sealing groove (246), and a through hole (248) is provided on the slider (247), wherein a first spring (249) is fixedly connected between one group of the sliders (247) and the sealing groove (246), and a connecting channel (2410) is connected between the two groups of the sealing grooves (246), and the sealing groove (246) is connected to the telescopic rod (19) through a pipeline.

4. The heat treatment device for a large rotor according to claim 1, characterized in that: The pitch adjustment mechanism comprises a connecting rod (20) hinged on the side wall of the washer (18); a connecting block (21) is hinged between two groups of the connecting rods (20) on the same side; a first worm (22) threadedly connected to the connecting block (21) is rotatably connected to the placement plate (4); a driven bevel gear (26) is fixedly connected to the side of the first worm (22) close to each other; the driven bevel gear (26) is meshed with the driving bevel gear set (25).

5. The heat treatment device for a large rotor according to claim 3, characterized in that: The support member (30) comprises a base (301) arranged on the second worm (27), a support seat (302) being slidably connected to the base (301), a compression rod (303) and a second spring (304) being fixedly connected between the support seat (302) and the base (301), The second spring (304) is sleeved on the outside of the compression rod (303), the compression rod (303) is connected to the feed channel (245) through a pipe, the base (301) is threadedly connected to the second worm gear (27), the support seat (302) is provided with a hole matching the second worm gear (27), and the placement plate (4) is fixedly connected to a positioning rod (31) that is slidably connected to the base (301).

6. A heat treatment device for a large rotor according to claim 5, characterized in that: It also includes a guide wheel (305) rotatably connected to the support seat (302), a mounting cavity (306) is provided on a side of the support seat (302) close to the axial end of the guide wheel (305), an adjusting gear (307) is fixedly connected to the side of the axial end of the guide wheel (305) close to the mounting cavity (306), a mounting cylinder (308) is fixedly connected to the side of the base (301) close to the mounting cavity (306), a tooth plate (309) meshing with the adjusting gear (307) is slidably connected inside the mounting cylinder (308), and a third spring (310) is fixedly connected between the tooth plate (309) and the mounting cylinder (308).

7. The heat treatment device for a large rotor according to claim 1, characterized in that: A plurality of groups of electric rails (3) are fixedly connected to the bottom plate (1); a matching electric slide rail (5) is fixedly connected to the side of the placement plate (4) close to the electric rails (3); a limit strip (7) is fixedly connected to the inner wall of the heat treatment furnace (2); and a limit groove (6) matching the limit strip (7) is provided on the side wall of the placement plate (4).

8. The heat treatment device for a large rotor according to claim 1, characterized in that: The top of the heat treatment furnace (2) is fixedly connected with a mounting frame (8) and a servo motor (9); a rotating shaft (10) is rotatably connected to the mounting frame (8); a linkage assembly (11) is arranged between the servo motor (9) and the rotating shaft (10); a plurality of groups of winding disks (12) are fixedly connected to the rotating shaft (10); positioning rails (13) are symmetrically fixedly connected to the heat treatment furnace (2); a sealing door (14) is slidably connected between two groups of the positioning rails (13); and a cable (15) is connected between the sealing door (14) and the winding disk (12).

9. The heat treatment device for a large rotor according to claim 8, characterized in that: It also includes a sealing member (16) fixedly connected to the placement plate (4); when the sealing member (16) moves to the bottom of the positioning rail (13), the sealing member (16) fits tightly with the positioning rail (13) and the side wall of the heat treatment furnace (2); and a groove matching the sealing door (14) is provided on the sealing member (16).

10. A method for heat treatment of a large rotor, using a heat treatment device for a large rotor according to any one of claims 1 to 9, comprising the following steps: Step 1: placing the rotor on the pad (18) by means of a lifting device, and transporting the rotor to the interior of the heat treatment furnace (2), and closing the heat treatment furnace (2), and then heat treating the rotor; Step 2: During the heat treatment process, the drive motor (23) is started according to the heat treatment time, the rotor is lifted up by the support member (30), and the rotor is driven to rotate after being lifted up; Step 3: Then, according to the initial position of the shim (18), the position of the shim (18) is automatically adjusted to reduce stress concentration during the heat treatment of the rotor; Step 4: After the heat treatment of the rotor is completed, the heat treatment furnace (2) is opened and the rotor is taken out to complete the heat treatment of the rotor.

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