Cooling protection device of large inductor for bearing induction heating

Abstract

The utility model belongs to the technical field of bearing induction heat treatment, and discloses a cooling protection device of a large inductor for bearing induction heating, which is characterized in that a mounting rack is fixedly arranged on the outer wall of the front side of a water box, the mounting rack is fixedly arranged on an inductor frame through bolts, and a plurality of spray heads are arranged in the water box; the spraying openings correspond to the positions of fixing bolts and bakelite plates on the inductor, signals of the spraying circulation system are connected into a PLC control program of the bearing induction heating equipment, and the spraying circulation system is synchronously controlled to operate through the PLC control program. The inductor cooling protection device is compact and reasonable in structural design and capable of running automatically, the situations that fixing bolts of an inductor loosen and deform, bakelite plates are scorched, deformed and cracked and the like are effectively prevented by reasonably arranging a spraying liquid circulating system and a spraying device and adopting a physical cooling method, the inspection and maintenance frequency is reduced, and the production efficiency is improved. Potential equipment faults and workpiece scrapping hidden dangers are reduced, and reliability, stability and production efficiency of operation of the induction heating equipment are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bearing induction heat treatment technical field, concretely relates to a kind of cooling protection device of large-scale inductor for bearing induction heating. BACKGROUND

[0002] With the development of wind power industry, large megawatt fan main bearing is quenched without soft belt, and new workpiece rotating induction heating overall quenching equipment needs to be used, the quenching equipment usually simultaneously heats bearing workpiece surface by multiple large-scale inductors, and the total heating of the same workpiece is shortened by more than 70% compared with traditional scanning quenching equipment.

[0003] The large-scale inductor used in workpiece rotating induction heating overall quenching equipment increases more in size compared with the inductor of scanning quenching equipment, and the heating single head of scanning quenching equipment generally has only 2 or 4 copper pipes, while the number of copper pipes of single head of new rotating induction heating overall quenching equipment reaches 10-20, and because bearing workpiece is in high-speed rotating state during heating, high-temperature thermal radiation on the surface of bearing workpiece causes the insulating bakelite board and fixing bolt fixed on the inductor to be scorched and deformed due to high temperature, which requires frequent inspection and maintenance, affecting production efficiency, and if not found in time, it will most likely cause shutdown and bearing workpiece scrap. SUMMARY

[0004] The utility model discloses in order to solve above-mentioned technical problem, provide a kind of cooling protection device of large-scale inductor for bearing induction heating, by the reasonable setting spray liquid circulation system and spray device, when workpiece induction heating, accurate corresponding insulating bakelite board, fixing bolt and other components on large-scale inductor are sprayed cooling protection, avoid fixing bolt loose deformation and bakelite board damage by high-temperature radiation, reduce equipment inspection and maintenance frequency, improve the stability and reliability of bearing induction heating overall quenching equipment operation, improve production efficiency.

[0005] The technical solution adopted by this utility model is as follows: a cooling and protection device for a large inductor used in bearing induction heating, including a spray device. The spray device includes a long, hollow water box. Mounting brackets are fixedly installed on the front outer wall of the water box near both ends. The mounting brackets are fixedly installed on the inductor frame on the top of the inductor by bolts. Both ends of the water box are provided with plugs. Several through holes are opened on the bottom plate of the water box. Several spray heads are provided inside the water box. The lower ends of the spray heads are inserted into the through holes of the bottom plate of the water box. The spray nozzles at the bottom of the spray heads correspond to the positions of the fixing bolts and bakelite boards on the inductor. A liquid inlet is provided on the top of the water box near the middle. The liquid inlet is fixedly connected to the spray pipe. The spray pipe is connected to the spray circulation system. Spray liquid is supplied to the water box through the spray circulation system. The spray circulation system includes a liquid supply pump, a filter, and valves. The control signals of the liquid supply pump and valves are connected to the PLC control program of the bearing induction heating equipment. The PLC control program synchronously controls the operation of the spray circulation system.

[0006] The water box has mounting grooves along its length in the middle of the front and rear side walls. A fixing plate is inserted into the mounting groove, and the height of the mounting groove is greater than the thickness of the fixing plate. Several through holes are opened on the fixing plate, and the diameter of the through holes of the fixing plate is adapted to the outer diameter of the upper end of the spray head. The spray head is inserted into the through holes of the fixing plate, and the outer periphery of the upper end face of the spray head is fixedly connected to the fixing plate. The diameter of the through holes on the bottom plate of the water box is adapted to the outer diameter of the lower end of the spray head.

[0007] The number and position of the spray heads correspond to the number and position of the through holes opened on the fixing plate and the bottom plate of the water box, and the spray heads are arranged in a five-point even distribution.

[0008] The spray head is a hollow cylindrical stepped structure. The upper end of the spray head is a circular opening, and the diameter of the opening decreases from top to bottom. The lower end is a slender small-hole spray nozzle.

[0009] The lower end of the spray head has a hole diameter of 0.5-1mm and a height of 5-6mm; the middle part has a hole diameter of 2-5mm and a height of 6-8mm; and the upper end has a hole diameter of 6-8mm and a height of 8-10mm.

[0010] The spray circulation system includes a quenching tank located below the bearing induction heating equipment. The lower part of the quenching tank is connected to a circulating liquid supply main pipe. The circulating liquid supply main pipe is equipped with valves, a liquid supply pump, a pressure stabilizing tank, and a filter in sequence. The rear end of the circulating liquid supply main pipe is connected in parallel to multiple circulating liquid supply branch pipes and valves. The circulating liquid supply branch pipes are respectively connected to the spray pipes of the sensor to supply spray liquid to the water box. After use, the spray liquid naturally falls back and is collected in the quenching tank.

[0011] The mounting bracket is a straight plate bent at 90° to form an L-shaped structure. One side plate of the mounting bracket is fixedly connected to the front outer wall of the water box, and the other side plate has an elongated hole in the waist shape. It is installed on the sensor frame by bolts. There are at least two mounting brackets.

[0012] The water box has a rectangular cross-section and can be made of copper square tubing or stainless steel square tubing.

[0013] The spray pipe is connected to the spray circulation system, which supplies spray liquid to the water box. The spray circulation system includes a supply pump, a filter, and valves. The control signals of the supply pump and valves are connected to the PLC control program of the bearing induction heating equipment, which synchronously controls the operation of the spray circulation system. The purpose of this setup is to use filtered quenching liquid as the spray liquid, making full use of the existing quenching tank and quenching liquid to spray and cool the bakelite boards and fixing bolts of the inductor, which are susceptible to heat radiation. A filter is installed to prevent oxide scale in the quenching liquid from clogging the spray heads and spray nozzles. A supply pump is installed on the circulation system, and the start and stop control of the supply pump is connected to the PLC control program. When the bearing induction heating quenching equipment starts working and heating the workpiece, the PLC control program controls the supply pump to start automatically. The quenching liquid is delivered to the inlet and water chamber of each inductor through the circulating supply main pipe and circulating supply branch pipe. The spray head precisely drips onto the bakelite boards and connecting bolts on the inductor. After heating is completed, the supply pump is turned off after a delay, stopping the operation of the spray liquid circulation system.

[0014] The water tank has a liquid inlet located near the center of its top. The spray heads are hollow, cylindrical, stepped structures with a circular opening at the top, decreasing in diameter from top to bottom, and a narrow, elongated spray nozzle at the bottom. This design aims to: place the liquid inlet at the top of the water tank, creating a water chamber at the top to buffer water pressure; ensure even liquid supply to all spray heads; and maintain consistent water output from each dripper. The narrow, elongated nozzle ensures a fine stream or dripping water flow, guaranteeing precise application to the bakelite board or connecting bolts without leakage or impact, and preventing excessive water from falling onto the sensor and workpiece. The liquid supply pressure of the circulation system is adjusted via a buffer tank and valves to regulate the water output of the spray heads, allowing for cooling of the sensor's connecting bolts and bakelite board at a relatively low pressure, ensuring an appropriate cooling rate.

[0015] The beneficial effects of this utility model are as follows: The inductor cooling and protection device has a compact and reasonable structure and is easy to operate. By reasonably setting up the spray liquid circulation system and spray device, the physical cooling method effectively prevents the fixing bolts of the inductor from loosening and deforming due to the high temperature radiation during the induction heating of the bearing workpiece, and prevents the bakelite board from being scorched, deformed, or cracked due to high temperature. This reduces the frequency of inspection and maintenance, reduces potential equipment failures and workpiece scrapping risks, and improves the reliability, stability and production efficiency of the induction heating equipment. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the three-dimensional structure schematic view of the utility model after installing the spraying device on the inductor frame.

[0017] Figure 2 It is the three-dimensional structure schematic view of the spraying device of the utility model.

[0018] Figure 3 It is the arrangement structure schematic view of the bottom spraying head of the water box of the utility model.

[0019] Figure 4 It is the longitudinal section structure schematic view of the water box of the utility model.

[0020] Figure 5 It is the transverse section structure schematic view of the water box of the utility model.

[0021] Figure 6 It is the spraying liquid circulation system schematic view of the utility model.

[0022] Markings in the drawing: 1, inductor; 2, inductor frame; 3, fixed bolt; 4, bakelite plate; 5, spraying device; 6, water box; 7, mounting bracket; 8, waist type long hole; 9, spraying pipeline; 10, water chamber; 11, liquid inlet; 12, spraying head; 13, spraying port; 14, plug; 15, fixed plate; 16, mounting groove; 17, quenching tank; 18, liquid supply pump; 19, pressure stabilizing tank; 20, filter; 21, valve; 22, circulating liquid supply main pipe; 23, circulating liquid supply branch pipe. DETAILED DESCRIPTION

[0023] The specific implementation of the utility model is further explained in detail in combination with the drawings.

[0024] As Figures 1-6As shown, a cooling protection device for a large induction heater for bearing induction heating includes a spraying device 5, which includes a long strip-shaped hollow water box 6. The front side outer wall of the water box 6 is fixedly provided with a mounting bracket 7 near both end positions. The mounting bracket 7 is fixedly installed on the induction heater frame 2 at the top of the induction heater 1 through bolts. The both end heads of the water box 6 are provided with plugs 14. A plurality of through holes are formed in the bottom plate of the water box 6. A plurality of spraying heads 12 are arranged in the water box 6. The lower end portions of the spraying heads 12 are inserted into the through holes in the bottom plate of the water box 6. The spraying openings 13 at the bottom of the spraying heads 12 correspond to the positions of the fixed bolts 3 and the bakelite plate 4 on the induction heater 1. A liquid inlet 11 is arranged at the top of the water box 6 near the middle position. The liquid inlet 11 is fixedly connected with a spraying pipeline 9. The spraying pipeline 9 is connected with a spraying circulating system. The spraying circulating system supplies spraying liquid to the water box 6 through the spraying circulating system. The spraying circulating system includes a liquid supply pump 18, a filter 20 and a valve 21. The control signals of the liquid supply pump 18 and the valve 21 are input into the PLC control program of the bearing induction heating equipment. The spraying circulating system is synchronously controlled through the PLC control program. The automatic control of the system is realized. The reliability of the equipment is improved. The production efficiency is improved.

[0025] A mounting groove 16 is formed in the middle of the front and rear side walls of the water box 6 along the length direction. A fixed plate 15 is inserted into the mounting groove 16. The height of the mounting groove 16 is greater than the thickness of the fixed plate 15. A plurality of through holes are formed in the fixed plate 15. The diameter of the through holes in the fixed plate 15 is adapted to the outer diameter of the upper end portions of the spraying heads 12. The spraying heads 12 are inserted into the through holes in the fixed plate 15. The upper end face outer periphery of the spraying heads 12 is fixedly connected with the fixed plate 16. The diameter of the through holes in the bottom plate of the water box 6 is adapted to the outer diameter of the lower end portions of the spraying heads 12.

[0026] The number and position of the spraying heads 12 correspond to the number and position of the through holes formed in the fixed plate 15 and the bottom plate of the water box 6. The spraying heads 12 are arranged in a five-point shape.

[0027] The spraying head 12 is a hollow cylindrical stepped structure. The upper end of the spraying head 12 is a circular opening. The opening diameter decreases from top to bottom. The lower end is an elongated small hole-shaped spraying opening 13.

[0028] The lower end portion of the spraying head 12 has a hole diameter of 0.5-1 mm and a height of 5-6 mm. The middle portion has a hole diameter of 2-5 mm and a height of 6-8 mm. The upper end portion has a hole diameter of 6-8 mm and a height of 8-10 mm.

[0029] The spray circulating system comprises a quenching tank 17 arranged below the bearing induction heating equipment, the lower part of the quenching tank 17 is communicated with a circulating liquid supply main pipe 22, the circulating liquid supply main pipe 22 is sequentially provided with a valve 21, a liquid supply pump 18, a pressure stabilizing tank 19 and a filter 20, the rear end of the circulating liquid supply main pipe 22 is connected in parallel with a plurality of circulating liquid supply branch pipes 23 and the valve 21, the circulating liquid supply branch pipes 23 are respectively communicated with the spray pipelines 9 of the inductors 1, and the used spray liquid is naturally collected in the quenching tank 17.

[0030] The mounting frame 7 is a straight plate bent by 90 degrees to form an L-shaped structure, one side plate of the mounting frame 7 is fixedly connected with the front outer wall of the water box 6, the other side plate is provided with a waist-shaped long hole 8 and is mounted on the inductor frame 2 by bolts, and the mounting frame 7 is at least two.

[0031] In use, the water box 6 can be made of a non-magnetic material such as a copper square tube or a stainless steel tube, the water box 6 is mounted on the inductor frame 2 at the top of the inductor 1 through the mounting frame 7, a plurality of spray heads 12 are fixedly arranged on the fixed plate 15, the height of the mounting groove 16 is greater than the thickness of the fixed plate 15, the fixed plate 15 is inserted into the water box 6 along the upper end position of the mounting groove 16, the lower end of the spray head 12 is aligned with the through hole on the bottom plate of the water box 6, the fixed plate 15 falls to the lower end position of the mounting groove 16, the fixed plate 15 with the spray head 12 is inserted into the mounting groove 16 on the two sides of the water box 6 and is mounted in place, then the water box 6 is sealed by the plugs 14 at the two ends, a water chamber 10 is formed above the fixed plate 15 in the water box 6, the positions of the spray nozzles 13 at the bottom of the spray head 12 correspond to the positions of the fixing bolts 3 and the bakelite plate 4 of the inductor 1, the top of the water box 6 is provided with an inlet 11 near the middle position and is fixedly connected with the spray pipeline 9, the spray pipeline 9 is communicated with the spray circulating system, the spray circulating system supplies the spray device 5 with spray liquid, the spray liquid is quenching liquid filtered by the filter 20, the control signals of the liquid supply pump 18 and the valve 21 of the spray circulating system are input into the PLC control program of the bearing induction heating equipment, the operation of the spray circulating system is synchronously controlled through the PLC control program, automatic control of the system is realized, the loosening of the fixing bolts 3 of the inductor 1 and the burning, deformation and cracking of the bakelite plate 4 caused by high-temperature radiation of the bearing workpiece during induction heating are effectively prevented, the inspection and maintenance frequency is reduced, potential equipment failure and workpiece scrapping hidden troubles are reduced, and thus the stability and reliability of the induction heating equipment operation are improved and the production efficiency is improved.

[0032] In addition to the above-mentioned embodiments, the utility model can also have other implementation manners, and any technical scheme formed by equivalent replacement or equivalent transformation falls within the protection scope required by the utility model.

Claims

1. A cooling protection device for a large induction heater for bearing induction heating, characterized by: The application discloses a cooling protection device for a large-sized inductor for bearing induction heating, which comprises a spraying device, the spraying device comprises a long-strip-shaped hollow water box, mounting racks are fixedly arranged on the front side outer wall of the water box near both ends, the mounting racks are fixedly arranged on the inductor frame on the top of the inductor through bolts, plugs are arranged at both ends of the water box, a plurality of through holes are formed in the bottom plate of the water box, a plurality of spraying heads are arranged in the water box, the lower end portions of the spraying heads are inserted into the through holes in the bottom plate of the water box, the spraying opening positions of the bottom portions of the spraying heads correspond to the positions of the fixed bolts and the bakelite plates on the inductor, a liquid inlet is arranged on the top of the water box near the middle position, the liquid inlet is fixedly connected with a spraying pipeline, the spraying pipeline is connected with a spraying circulating system, the spraying circulating system supplies spraying liquid to the water box, the spraying circulating system comprises a liquid supply pump, a filter and a valve, the control signals of the liquid supply pump and the valve are input into the PLC control program of the bearing induction heating equipment, and the spraying circulating system is synchronously controlled to operate through the PLC control program.

2. The cooling protection device for a large induction heater for bearing induction heating according to claim 1, characterized in that: Mounting grooves are formed in the middle portions of the front and rear side walls of the water box along the length direction, fixing plates are inserted into the mounting grooves, the height of the mounting grooves is greater than the thickness of the fixing plates, a plurality of through holes are formed in the fixing plates, the diameters of the through holes of the fixing plates are matched with the outer diameters of the upper end portions of the spraying heads, the spraying heads are inserted into the through holes of the fixing plates, and the outer periphery of the upper end faces of the spraying heads is fixedly connected with the fixing plates.

3. The cooling protection device for a large induction heater for bearing induction heating according to claim 1, characterized in that: The number and positions of the spraying heads correspond to the number and positions of the through holes formed in the fixing plates and the bottom plate of the water box, and the spraying heads are arranged in a five-point shape.

4. The cooling protection device for a large induction heater for bearing induction heating according to claim 1, characterized in that: The spraying head is a hollow cylindrical stepped structure, the upper end of the spraying head is a circular opening, the diameter of the opening decreases from top to bottom, and the lower end is an elongated small hole-shaped spraying opening.

5. The temperature protection device for a large induction heater for bearing induction heating according to claim 4, characterized in that: The diameter of the lower end portion of the spraying head is 0.5-1mm, and the height is 5-6mm; the diameter of the middle portion is 2-5mm, and the height is 6-8mm; the diameter of the upper end portion is 6-8mm, and the height is 8-10mm.

6. The cooling protection device for a large induction heater for bearing induction heating according to claim 1, characterized in that: The spraying circulating system comprises a quenching tank, the quenching tank is arranged below the bearing induction heating equipment, the lower portion of the quenching tank is connected with a circulating liquid supply main pipe, a valve, a liquid supply pump, a pressure stabilizing tank and a filter are sequentially arranged on the circulating liquid supply main pipe, a plurality of circulating liquid supply branch pipes and valves are connected in parallel at the rear end of the circulating liquid supply main pipe, the circulating liquid supply branch pipes are connected in communication with the spraying pipelines of the inductors, the spraying liquid is supplied to the water box, and the used spraying liquid naturally falls back and is collected in the quenching tank.

7. The cooling protection device for a large induction heater for bearing induction heating according to claim 1, characterized in that: The mounting rack is a straight plate bent by 90 degrees into an L-shaped structure, one side plate of the mounting rack is fixedly connected with the front side outer wall of the water box, a waist-shaped long hole is arranged on the other side plate, the mounting rack is arranged on the inductor frame through bolts, and the mounting rack is at least two.

8. The cooling protection device for a large induction heater of a bearing induction heating according to claim 1, characterized in that: The transverse section of the water box is a rectangular shape, and the water box can be made of a copper square tube or a stainless steel square tube.

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