Lifting mechanism for induction heating integral quenching of bearing

Abstract

The utility model discloses a lifting mechanism for induction heating integral quenching of a bearing, which comprises a tetragonal quenching tank, four corners of the quenching tank are vertically flush, a lifting device is vertically mounted on the periphery of the four corners of the quenching tank, a lifting platform is arranged in the quenching tank, vertical connecting columns are fixedly arranged at four corners of the lifting platform, and the lifting device is connected with the lifting platform. The top of the lifting device is fixedly connected with the top of the vertical connecting column through a bolt, a guide rail is arranged on the lifting platform, a lifting device is installed on the guide rail and can move along the guide rail, a workpiece is placed on the lifting device, and the lifting device drives the lifting platform and the workpiece to do lifting motion through the connecting column. The lifting mechanism is compact and reasonable in structural design and convenient to operate, accurate and stable control over overall lifting of induction quenching workpieces can be achieved, the lifting movement mechanism is located outside the quenching tank, the influence of quenching media on the movement mechanism is avoided, the operation stability of quenching equipment is improved, and the product quality of the induction quenching workpieces is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearing induction quenching heat treatment, and particularly relates to a lifting mechanism for bearing induction heating integral quenching. Background Art

[0002] Wind turbine main shaft bearings primarily support the main shaft, carrying axial and radial loads and torque. These bearings are subject to demanding technical requirements, harsh operating environments, high maintenance costs, and a long service life. They connect the hub to the gearbox, transferring kinetic energy generated by the blades to the gearbox. As a critical component of the wind turbine, the performance and reliability of the main bearings directly impact the efficiency and lifespan of the wind turbine. With the development and manufacture of larger-megawatt wind turbines, the heat treatment process for traditional carburized steel main bearings has become increasingly difficult to control deformation, resulting in long production cycles, high costs, and unreliable delivery schedules, hindering industry development. Consequently, soft-band-free induction hardening of main bearing rings is gaining acceptance as an alternative to traditional carburizing and quenching, making soft-band-free quenching a new trend for large-megawatt wind turbine main bearings. However, traditional soft-band-free induction hardening, which involves scanning heating and quenching, often struggles to maintain uniformity in the hardened layer depth and hardness, leading to high product rework rates and frequent cracking and scrapping. Consequently, a new rotary induction hardening system has been developed.

[0003] Quenching and cooling are key steps in heat treatment, and the smooth progress of the cooling process directly affects the final quenching quality of the product. After induction heating, the workpiece must quickly enter the quenching liquid for cooling. Ensuring the stable and reliable operation of the motion mechanism during this process is crucial. To avoid the risk of damage to the motion mechanism components caused by the quenching medium when the lifting device is installed inside the quenching tank, which would affect the timeliness, reliability, and stability of the quenching cooling after induction heating, a new lifting mechanism for bearing induction heating integral quenching is urgently needed. Summary of the Invention

[0004] In order to solve the above technical problems, the utility model provides a lifting mechanism for induction heating integral quenching of bearings. The structure is compact and reasonable in design, and the operation is convenient. The lifting mechanism can realize the precise and stable control of the overall lifting of the induction quenching workpiece. The lifting mechanism is located outside the quenching tank, which avoids the influence of the quenching medium on the movement mechanism, improves the stability of the quenching equipment operation, avoids serious accidents such as product rework or even scrapping caused by the lifting mechanism, ensures the long-term and reliable operation of the quenching equipment, and guarantees the product quality of the induction quenching workpiece.

[0005] The technical solution adopted by the utility model is: a lifting mechanism for integral quenching of bearings by induction heating, comprising a square quenching tank, the four corners of the quenching tank are vertically flush, the lifting device is vertically installed on the periphery of the four corners of the quenching tank, a lifting platform is provided in the quenching tank, vertical connecting columns are fixedly provided at the four corners of the lifting platform, the top of the lifting device is fixedly connected to the top of the vertical connecting column by bolts, a guide rail is provided on the lifting platform, a lifting device is installed on the guide rail, the lifting device can move along the guide rail, the workpiece is placed on the lifting device, and the lifting device drives the lifting platform and the workpiece to move up and down through the connecting column.

[0006] The exterior of the lifting device is a square chassis, the bottom periphery of the chassis is provided with a square flange to facilitate vertical fixation of the chassis, the top of the chassis is open, and a lifting movement mechanism is installed in the chassis.

[0007] A servo motor is installed on the upper part of the lifting mechanism, and a lead screw is vertically provided at the lower part of the servo motor. The output shaft of the servo motor is coaxially connected to the lead screw, and the upper end of the lead screw is provided with a support seat connected to the inner wall of the chassis, and guide columns are provided on both sides of the support seat. There are also bearings sleeved on the guide columns, and two guide columns are symmetrically provided; a lead screw nut is sleeved on the lead screw, and a fixed block is connected to the outside of the lead screw nut. The top of the guide column extends out of the top of the chassis and is fixed with a connecting block, the bottom end of the guide column is connected to the fixed block, and the bottom end of the lead screw is sleeved with a limit block.

[0008] A protruding block is integrally extended from the upper portion of one side of the connecting block, the top surface of the protruding block is concave, and screw holes are provided on the top surface and side surfaces of the protruding block.

[0009] The connecting column is made of a square tube, and a square flange is provided on the outer side of the bottom surface of the connecting column. The top of the connecting column is horizontally extended to one side to provide a connecting square tube, and the top of the connecting square tube is provided with a top plate, which is flush with the top of the connecting column. The end face of the connecting square tube is provided with a side plate wider than the end face, and the top of the top plate extends out of the side plate, and the ends of the side plate are provided with connecting screw holes. The top plate extends out of the position of the side plate to form an L-shaped connection structure.

[0010] The position and size of the top surface of the protruding block of the connecting block and the screw holes opened on the top surface are adapted to the position and size of the connecting screw holes opened on the top plate of the connecting column; the position and size of the screw holes opened on the side surface of the protruding block and the screw holes opened on the side surface are adapted to the position and size of the connecting screw holes opened on the side plate of the connecting column and the side plate.

[0011] The top of the lifting device is fixedly connected to the top of the vertical connecting column by bolts; the purpose of this arrangement is: lifting devices are arranged on the periphery of the four corners of the quenching tank, and vertical connecting columns are arranged on the lifting platform inside the quenching tank. Through the fixed connection between the top of the lifting device and the top of the connecting column, the lifting and lowering movement mechanism of the lifting device drives the lifting platform to rise and fall through the connecting column, which is convenient for the wind turbine main bearing ring to be quenched and heat treated as a whole after induction heating. The lifting and lowering movement mechanism is located outside the quenching tank, which avoids the influence of the quenching medium on the movement mechanism, improves the stability of the quenching equipment operation, avoids serious accidents such as product rework or even scrapping caused by this, ensures the long-term and reliable operation of the quenching equipment, and ensures the product quality of the induction quenched workpiece.

[0012] A servo motor is installed on the upper part of the lifting mechanism, and a lead screw is vertically provided at the lower part of the servo motor. The output shaft of the servo motor is coaxially connected to the lead screw, and the upper end of the lead screw is provided with a support seat connected to the inner wall of the chassis, and guide columns are provided on both sides of the support seat, and bearings are also provided on the guide columns, and two guide columns are symmetrically provided; the purpose of this arrangement is: the lead screw of the lifting mechanism is arranged vertically, so that the overall structure of the lifting mechanism is compact and the space at the four corners of the quenching tank is fully utilized; the servo motor can adopt a curve acceleration method, which is easy to operate, and the lifting mechanism is accurately positioned by the servo motor and the lead screw, which can realize accurate and stable control of the overall lifting of the induction quenching workpiece, so that the lifting mechanism can run smoothly, and the lifting mechanism drives the lifting platform and the overall quenching heat treatment operation of the workpiece through the connecting column. The control is accurate and stable, thereby ensuring the product quality of the induction quenching workpiece.

[0013] The beneficial effects of the present invention are as follows: the lifting mechanism has a compact and reasonable structural design and is easy to operate. The lifting mechanism is accurately positioned and smoothly operated through the servo motor and the lead screw, and the precise and stable control of the overall lifting of the induction quenching workpiece can be achieved. The lifting mechanism is located outside the quenching tank, which avoids the influence of the quenching medium on the movement mechanism, improves the stability of the quenching equipment operation, avoids serious accidents such as product rework or even scrapping caused by this, ensures the long-term, stable and reliable operation of the quenching equipment, ensures the product quality of the induction quenching workpiece, and improves the utilization rate and production efficiency of the wind turbine main bearing quenching induction equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall top view of the lifting mechanism of the utility model;

[0015] Figure 2 This is a schematic side view of the overall structure of the lifting mechanism of the utility model;

[0016] Figure 3 This is a schematic structural diagram of the lifting device of the utility model;

[0017] Figure 4 This is a schematic structural diagram of the connecting column of the utility model;

[0018] Figure 5 It is a structural diagram of the lifting motion mechanism of the utility model.

[0019] Markings in the figure: 1. Quenching tank; 2. Lifting device; 3. Lifting platform; 4. Connecting column; 5. Guide rail; 6. Workpiece; 7. Chassis; 8. Servo motor; 9. Screw; 10. Screw nut; 11. Support seat; 12. Bearing; 13. Guide column; 14. Connecting block; 15. Fixed block; 16. Limit block; 17. Square flange; 18. Top plate; 19. Side plate; 20. Connecting square tube; 21. Raised block. DETAILED DESCRIPTION

[0020] The specific implementation of the present invention is further described in detail below with reference to the accompanying drawings.

[0021] like Figure 1-5 As shown, a lifting mechanism for induction heating integral quenching of bearings includes a square quenching tank 1 with its four corners aligned vertically. A lifting device 2 is vertically mounted on the periphery of the four corners of the quenching tank 1. A lifting platform 3 is disposed within the quenching tank 1, with vertical connecting columns 4 fixedly disposed at the four corners of the lifting platform 3. The top of the lifting device 2 is fixedly connected to the top of the vertical connecting columns 4 by bolts. A guide rail 5 is disposed on the lifting platform 3, and a lifting device is mounted on the guide rail 5. The lifting device can move along the guide rail 5. A workpiece 6 is placed on the lifting device. The lifting device 2 drives the lifting platform 3 and the workpiece 6 up and down via the connecting columns 4. The lifting device 2 drives the lifting platform 3 and the workpiece 6 through the connecting columns 4, ensuring precise and stable control of the integral quenching heat treatment operation, thereby ensuring the product quality of the induction hardened workpiece.

[0022] The exterior of the lifting device 2 is a square chassis 7 , and a square flange 17 is provided on the outer periphery of the bottom of the chassis 7 to facilitate vertical fixation of the chassis 7 . The top of the chassis 7 is open, and a lifting mechanism is installed inside the chassis 7 .

[0023] A servo motor 8 is installed on the upper part of the lifting mechanism, and a lead screw 9 is vertically provided at the lower part of the servo motor 8. The output shaft of the servo motor 8 is coaxially connected to the lead screw 9. The upper end of the lead screw 9 is provided with a support seat 11 connected to the inner wall of the chassis 7. Guide columns 13 are provided on both sides of the support seat 11. Bearings 12 are also provided and sleeved on the guide columns 13. There are two guide columns 13 symmetrically provided. A lead screw nut 10 is sleeved on the lead screw 9. A fixed block 15 is connected to the outside of the lead screw nut 10. The top of the guide column 13 extends out of the top of the chassis 7 and is fixedly provided with a connecting block 14. The bottom end of the guide column 13 is connected to the fixed block 15. The bottom end of the lead screw 9 is sleeved with a limit block 16. The lead screw 9 of the lifting mechanism is arranged vertically, which makes the overall structure of the lifting device 2 compact and makes full use of the space at the four corners of the quenching tank 1.

[0024] A protruding block 21 is integrally extended from the upper portion of one side of the connecting block 14 . The top surface of the protruding block 21 is concave, and screw holes are provided on the top surface and side surfaces of the protruding block 21 .

[0025] The connecting column 4 is made of a square tube. A square flange 17 is provided on the outer side of the bottom surface of the connecting column 4. A connecting square tube 20 is provided horizontally extending to one side from the top of the connecting column 4. A top plate 18 is provided on the top of the connecting square tube 20. The top plate 18 is flush with the top of the connecting column 4. The end surface of the connecting square tube 20 is provided with a side plate 19 that is wider than the end surface. The top plate 18 extends beyond the side plate 18. The ends of the side plate 19 are provided with connecting screw holes. The position where the top plate 18 extends beyond the side plate 19 forms an L-shaped connection structure. The connecting column 4 is fixed to the top of the lifting device 2 through the L-shaped connection structure, improving its overall stability.

[0026] The top surface of the raised block 21 of the connecting block 14 and the position and size of the screw holes opened on the top surface are adapted to the position and size of the connecting screw holes opened on the top plate 18 of the connecting column 4; the side surfaces of the raised block 21 and the position and size of the screw holes opened on the side surfaces are adapted to the position and size of the connecting screw holes opened on the side plates 19 of the connecting column 4 and the side plates 19.

[0027] During use, the position of the lifting device is adjusted using the guide rails 5 on the lifting platform 3 according to the size of the workpiece 6. The workpiece 6 is placed on the lifting device of the lifting platform 3. The lifting device 2 is raised and lowered to position the lifting platform 3 and the workpiece 6 above the quenching tank 1, at a certain height above the liquid level of the quenching medium. The program-controlled robotic arm drives the multi-head inductor to the set heating position. After the workpiece 6 is inductively heated to the temperature required by the process, the inductor is quickly withdrawn to a safe distance. The lifting device 2 is then operated to rapidly descend, driving the lifting platform 3 and the workpiece 6 into the quenching tank 1 for cooling via the connecting column 4. The servo motor 8 of the lifting device 2 outputs power, driving the lead screw 9 to rotate, causing the lead screw nut 10 to rise or fall along the lead screw 9. The lead screw nut 10 and the fixing blocks 15 on both sides drive the guide column 13 to rise and fall. The connecting block 14 at the upper end of the guide column 13 drives the connecting column 4 and the lifting platform 3 to rise and fall. The servo motor 8 and lead screw 9 ensure precise positioning and stable operation of the lifting mechanism, thereby achieving precise and stable control of the overall lifting of the induction hardened workpiece 6. Through reasonable design, all the moving mechanisms of the entire quenching lifting device 2 are located outside the quenching tank 1, avoiding the moving mechanisms from being immersed in the quenching medium, and effectively preventing the moving mechanisms from being affected by the corrosion of the quenching medium, thereby ensuring the long-term stable operation of the quenching equipment and the product quality of the induction quenching workpiece 6.

[0028] In addition to the above embodiments, the present invention may also have other implementation methods. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A lifting mechanism for bearing induction heating and integral quenching, characterized by: It includes a cubic quenching tank with four corners vertically flush. The lifting device is vertically installed on the periphery of the four corners of the quenching tank. A lifting platform is provided in the quenching tank. Vertical connecting columns are fixedly provided at the four corners of the lifting platform. The top of the lifting device is fixedly connected to the top of the vertical connecting column by bolts. A guide rail is provided on the lifting platform, and a lifting device is installed on the guide rail. The lifting device can move along the guide rail. The workpiece is placed on the lifting device. The lifting device drives the lifting platform and the workpiece to move up and down through the connecting column.

2. The lifting mechanism for induction heating integral quenching of bearings according to claim 1, characterized in that: The outside of the lifting device is a square chassis, and a square flange is provided on the outer periphery of the bottom of the chassis to facilitate vertical fixation of the chassis. The top of the chassis is open, and a lifting movement mechanism is installed inside the chassis.

3. The lifting mechanism for induction heating and integral quenching of bearings according to claim 2, characterized in that: A servo motor is installed on the upper part of the lifting mechanism, and a lead screw is vertically provided at the lower part of the servo motor. The output shaft of the servo motor is coaxially connected to the lead screw, and the upper end of the lead screw is provided with a support seat connected to the inner wall of the chassis. Guide columns are provided on both sides of the support seat, and bearings sleeved on the guide columns are also provided. There are two guide columns symmetrically provided; a lead screw nut is sleeved on the lead screw, and a fixed block is connected to the outside of the lead screw nut. The top of the guide column extends out of the top of the chassis and is fixed with a connecting block. The bottom end of the guide column is connected to the fixed block, and the bottom end of the lead screw is sleeved with a limit block.

4. The lifting mechanism for induction heating integral quenching of bearings according to claim 3, characterized in that: A protruding block is integrally extended from the upper portion of one side of the connecting block, the top surface of the protruding block is concave, and screw holes are provided on the top surface and side surfaces of the protruding block.

5. The lifting mechanism for induction heating and integral quenching of bearings according to claim 1, characterized in that: The connecting column is made of a square tube, and a square flange is provided on the outer side of the bottom surface of the connecting column. The top of the connecting column extends horizontally to one side and is provided with a connecting square tube. The top of the connecting square tube is provided with a top plate, and the top plate is flush with the top of the connecting column. The end face of the connecting square tube is provided with a side plate wider than the end face. The top plate extends out of the side plate, and the ends of the side plate are provided with connecting screw holes. The top plate extends out of the position of the side plate to form an L-shaped connection structure.

6. A lifting mechanism for bearing induction heating integral quenching according to claim 3 or 4, characterized in that: The top surface of the raised block of the connecting block and the position and size of the screw holes opened on the top surface are compatible with the position and size of the connecting screw holes opened on the top plate of the connecting column; the side surface of the raised block and the position and size of the screw holes opened on the side surface are compatible with the position and size of the connecting screw holes opened on the side plate of the connecting column.

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