Motor coil insulating paint immersion drying device

Abstract

The invention discloses a motor coil insulating paint immersing and drying device, and relates to the technical field of motor coil painting. The device comprises a painting bin, a hydraulic push rod and a supporting assembly, a movable hole is formed in the bottom in the painting bin in a penetrating mode, paint for painting insulating paint on a coil is contained in the painting bin, a pushing piston for pushing the insulating paint in the painting bin is fixed to the telescopic end of the hydraulic push rod, the pushing piston is movably connected into the painting bin, and a supporting disc is fixed to the upper portion in the painting bin. A sealing ring is fixed to the top end of the supporting disc, a conveying opening and an air inlet sleeve are vertically formed in the supporting disc in an annular array in a penetrating mode, and the bottom end of the air inlet sleeve is fixed to the top of the sealing cover on the outer side of the communicating opening. By arranging the painting bin, the hydraulic push rod, the supporting assembly, the sealing cover and the air inlet sleeve, the problems that in the drying production process of the motor coil paint dipping device, paint for paint dipping is not well shielded, a solvent is easily volatilized, the concentration of the remaining paint is increased, and the uniformity of coil paint dipping production is affected are solved.

Description

Technical Field

[0001] This invention belongs to the field of motor coil coating technology, and in particular relates to a motor coil insulating varnish immersion and drying device. Background Technology

[0002] The motor coil insulation varnish impregnation and drying device is a key piece of equipment in motor manufacturing and maintenance. It is used to form a uniform, dense varnish film on the coil surface with excellent electrical insulation, mechanical protection, moisture resistance and heat dissipation. The whole device is mainly composed of two core parts: the varnish impregnation system and the drying (curing) system.

[0003] The core of the varnish impregnation system is a varnish tank made of corrosion-resistant materials (such as stainless steel and fiberglass) to hold insulating varnish. The coil is immersed in the varnish by manual, semi-automatic, or fully automatic mechanisms (such as baskets, conveyor chains, and robotic arms) to ensure complete immersion. The immersion process requires strict control of time, depth, and number of times to ensure that the varnish fully penetrates the internal gaps of the coil. After immersion, the coil is lifted to the dripping area, and excess varnish is allowed to flow back to the varnish tank naturally within a set time. This is crucial for controlling the varnish film thickness and reducing waste. To maintain the performance of the varnish, the system is equipped with a circulation pump, a filter (to remove impurities), a viscosity control system (to monitor and automatically / manually add solvent to maintain the set viscosity through a viscometer), and a temperature control device (which indirectly affects viscosity). Since the varnish impregnation process releases volatile organic compounds (VOCs), the system must be equipped with effective ventilation devices (such as exhaust hoods and ducts) and environmentally compliant VOC treatment systems, such as activated carbon adsorption, catalytic combustion (RCO), regenerative thermal oxidizer (RTO), or condensation recovery devices.

[0004] The task of the drying (curing) system is to heat the impregnated coils in a controlled environment so that the insulating varnish can complete the chemical reaction and cure. The main body of the system is a well-insulated oven (suitable for batch processing) or a tunnel drying tunnel (suitable for continuous production). The heating method can be electric heating (precise temperature control, clean) or gas / oil heating (lower operating cost, often indirect heating).

[0005] Meanwhile, a search of existing public documents revealed a patent document with patent number CN220273493U, which discloses a motor coil impregnation device. This device includes an impregnation tank and an impregnation mechanism mounted on top of the tank. A drying device is installed on the top of the tank. The impregnation mechanism includes a lifting assembly, a support plate detachably fixed to the lifting assembly, and an impregnation component rotatably mounted below the support plate. A connecting assembly connected to the impregnation component is installed at the bottom of the support plate. Through the impregnation tank and mechanism, a first and second impregnation component work together to place the motor coil. A hydraulic cylinder impregnates the motor coil wiring. A motor and connecting rod control the rotation of the motor coil in the insulating varnish, causing the motor coil to collide and fuse with the insulating varnish, reducing the fusion impregnation time and improving the device's wire impregnation efficiency. The motor controls the rotation of the motor coil, allowing residual insulating varnish on the motor coil to fall off quickly, improving the drying efficiency of the drying equipment. However, it still has the following drawbacks in practical use:

[0006] In practical application, the aforementioned patent employs an open-type impregnation process. During the impregnation of the motor coil with sanded paint, firstly, the solvent in the paint evaporates into the air, creating a safety hazard. Furthermore, during the drying process, there is no separation between the paint and the coil. The remaining paint after coating will receive a lot of heat, and the increased temperature causes the paint solvent to evaporate, resulting in an increased concentration of the remaining paint. This leads to significant differences in the impregnation conditions of different batches of coils, affecting the uniformity of coil impregnation production. Summary of the Invention

[0007] The purpose of this invention is to provide a motor coil insulation varnish immersion and drying device. By setting up a varnish coating chamber, hydraulic push rod, support assembly, sealing cover and air inlet sleeve, it solves the problem that the varnish in the motor coil varnish immersion drying process is not well shielded, which easily leads to solvent evaporation and increased concentration of residual varnish, affecting the uniformity of coil varnish immersion production.

[0008] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0009] This invention relates to a device for immersion and drying of insulating varnish for motor coils, comprising a coating chamber with a through-hole at the bottom and containing the varnish for coating the coils; a hydraulic push rod with a piston fixed to its telescopic end for pushing the insulating varnish in the coating chamber; a support assembly including a support plate, a conveying port, and a sealing ring; a support plate fixed to the upper part of the coating chamber, with a sealing ring fixed to the top of the support plate; and a conveying port arranged vertically in a ring array within the support plate. The conveying port is located within a sealed ring. A sealing cover has a centrally located rotating hole at its top. A connecting port is formed through the sealing cover on one side of the rotating hole. An air inlet sleeve has its bottom end fixed to the top of the sealing cover outside the connecting port. A heating assembly is located within the air inlet sleeve. A rotating assembly includes a drive shaft, a turntable, and a limiting mesh. The drive shaft is movably connected through the rotating hole. The turntable is fixed to the bottom end of the drive shaft, and a limiting mesh is fixed to the edge of the turntable's top. The coating chamber serves as the core container for coil impregnation, and its bottom legs provide... The mechanical support features a movable hole that accommodates the piston rod of a hydraulic pusher. The hydraulic pusher drives the piston to rise and fall within the coating chamber. The high-precision fit between the piston and the chamber wall forms a dynamic sealing interface, enabling precise control of the paint level and preventing leakage. The support assembly includes a support plate that is positioned by inserting into the pins at the bottom of the turntable via insertion holes. This plate supports the rotor and coil immersed in the paint. Its delivery port forms a bidirectional flow channel for the paint (rising coating / falling backflow). The L-shaped inclined structure of the sealed ring prevents hot air from entering the delivery port during drying, while the bottom notch forms the upward path for the paint, ensuring a seal. The lid is raised and lowered by an electric push rod. Its rotating hole connects to the drive shaft, the connecting port guides hot air, the vent pipe discharges waste gas, and the fan inside the air inlet sleeve draws air in from the air inlet sleeve. After being heated by the heating component in the fixed frame, it forms drying hot air. The drive motor of the rotating component adjusts the torque and speed through the reducer, and drives the turntable to rotate through the rotating disk and drive shaft, realizing centrifugal draining and drying even rotation. The paint replenishment chamber is replenished with new paint through the paint delivery pipe and the first electric control valve. The air inlet pipe and the second electric control valve maintain the standard air pressure in the chamber. The connecting pipe and the third electric control valve control the gravity delivery of the paint. The liquid level is monitored in real time through the window.

[0010] Furthermore, a fixed opening is provided on the upper periphery of the paint tank, and the bottom of the paint tank is fixed with legs in a circular array. The telescopic end of the hydraulic push rod passes through the movable hole. The fixed opening on the upper periphery of the paint tank serves as a pipe interface, which is sealed and connected to the connecting pipe to realize the paint conveying channel of the paint tank. The fixed legs in a circular array at the bottom of the paint tank provide basic support to ensure that the entire equipment is stably placed on the working plane. The telescopic end of the hydraulic push rod passes precisely through the movable hole and drives the piston to move up and down to control the paint level in the paint tank.

[0011] Furthermore, the support assembly also includes a socket and a notch. The socket is located at the center of the top of the support plate, and the notch is arranged in a ring array at the bottom of the sealing ring. After the sealing ring is vertically half-sectioned, the half-section is L-shaped and the horizontal part is inclined upward. The sealing ring is fixed to the inner wall of the paint tank. The socket at the center of the top of the support plate and the plug at the bottom of the turntable form a plug-in fit to realize the radial positioning of the rotating part.

[0012] Furthermore, the sealing cover is movably connected to the top of the paint coating chamber. A vent pipe is fixedly connected to the top of the sealing cover, and the top of the vent pipe is fixedly connected to a ventilation device. Connecting plates are fixedly arranged in a ring around the periphery of the sealing cover. An electric push rod is provided below each connecting plate. The telescopic ends of the electric push rods are fixed to the connecting plates. The sealing cover is driven to rise and fall by the electric push rods in the ring around the periphery: the telescopic ends of the electric push rods are directly connected to the connecting plates, which drives the sealing cover to open and close the paint coating chamber. The vent pipe fixed to the top of the sealing cover is connected to an external exhaust device, which forcibly discharges the waste gas containing volatile organic solvents during the drying stage to maintain the air pressure balance inside the chamber.

[0013] Furthermore, the inner wall of the air intake sleeve is fixed with connecting columns in a ring array. Each connecting column is fixed with a fixing frame at one end near the central axis of the air intake sleeve. A heating component is fixedly installed in all the fixing frames. The top of the air intake sleeve is fixedly connected to an air inlet sleeve. A fan is fixed inside the air inlet sleeve. Multiple fixing frames are fixed to the inner wall of the air intake sleeve through the ring array of connecting columns, which together support the heating component. The heating component continuously heats the air passing through the air intake sleeve. The fan inside the air inlet sleeve connected to the top of the sleeve forcibly draws in external air and compresses it to the heating area, forming a directional flow of hot air.

[0014] Furthermore, the rotating assembly also includes a post and a protective ring. A post is fixed at the center of the bottom end of the turntable and is inserted into a socket. The turntable is set inside a sealed ring. A protective ring is fixed at the top of the limiting net. The post at the center of the bottom end of the turntable is inserted into the socket of the support plate to form a rotation axis positioning mechanism to ensure the coaxial accuracy of the turntable when it rotates at high speed. The protective ring welded to the top of the limiting net forms a physical barrier to prevent the coil on the turntable from leaving the working area under the action of centrifugal force.

[0015] Furthermore, the rotating assembly also includes a reducer, a drive motor, a rotating disk, and support columns. The output end of the reducer is fixed to the rotating disk, and the bottom end of the rotating disk is fixed to the top end of the drive shaft. Support columns are fixed in a circular array on the bottom end of the reducer outside the rotating disk. The bottom end of the support columns is fixed to the top end of the sealing cover. The top end of the reducer is fixed to the drive motor, and the output end of the drive motor is fixed to the power input end of the reducer. The drive motor outputs power to the reducer, and after torque and speed adjustment, it drives the rotating disk to rotate through the output end. The bottom end of the rotating disk is rigidly connected to the drive shaft to transmit power. The bottom of the reducer is fixed to the top end of the sealing cover through the circular array of support columns, forming a stable transmission support structure.

[0016] Furthermore, a touch-up paint compartment is provided on one side of the paint coating compartment. A viewing window is fixedly installed through the center of the top of the touch-up paint compartment. A connecting pipe is fixedly connected to the lower periphery of the touch-up paint compartment. The end of the connecting pipe away from the touch-up paint compartment is fixed in a fixed opening. An electric control valve three is fixed to the periphery of the connecting pipe. The touch-up paint compartment is sealed and connected to the fixed opening of the paint coating compartment through the connecting pipe at the lower periphery, forming a paint flow channel between the two compartments. The electric control valve three installed on the periphery of the connecting pipe precisely controls the on / off of paint delivery. The viewing window through the top of the touch-up paint compartment provides a visual monitoring window for the liquid level.

[0017] Furthermore, a paint supply pipe is fixedly connected to one side of the viewing window at the top of the paint supply tank. An electrically controlled valve is fixedly fixed to the periphery of the paint supply pipe. The top of the paint supply pipe is fixedly connected to the pipeline for replenishing insulating varnish. A vent pipe is fixedly connected to the top of the paint supply tank at a position symmetrical to the paint supply pipe. The top of the vent pipe is fixedly connected to an exhaust device. An electrically controlled valve is fixedly fixed to the periphery of the vent pipe. The paint supply pipe controls the supply of new paint to the paint supply tank through the electrically controlled valve. The symmetrically arranged vent pipe is connected to the exhaust device through the electrically controlled valve. By introducing / expelling air, a constant standard atmospheric pressure is maintained inside the paint supply tank, eliminating the influence of air pressure fluctuations caused by changes in liquid level.

[0018] Furthermore, a fixed plate is fixed to the bottom of the paint repair compartment, and a support frame is fixed to the bottom of the fixed plate. The bottom of the paint repair compartment is rigidly connected to the support frame through the fixed plate. The support frame transfers the overall load of the paint repair compartment to the working plane, forming a stable three-level support structure to ensure the mechanical stability during paint repair operations.

[0019] The present invention has the following beneficial effects:

[0020] This invention solves the problem in the drying process of motor coil impregnation devices where the impregnated paint is not properly shielded, easily evaporates as solvent, and the increased concentration of residual paint affects the uniformity of coil impregnation. The invention incorporates a paint-coating chamber, a hydraulic pusher, a support assembly, a sealing cover, and an air inlet sleeve. The telescopic end of the hydraulic pusher extends into the paint-coating chamber through a movable hole, and a push piston is fixed at its end. The push piston forms a movable connection with the inner wall of the paint-coating chamber to drive the paint flow. A support plate is fixed to the upper part of the paint-coating chamber, and a sealed ring is provided at the top of the support plate. Together, these components constitute the paint conveying system. Multiple vertically penetrating conveying ports are arranged in a circular array on the surface of the support plate, all located within the closed space of the sealed ring. A fixing port is provided on the upper part of the side wall of the paint-coating chamber, and the bottom... Stable support is provided by the ring-shaped array of legs. A socket is opened in the center of the top of the support plate, and a ring-shaped notch is provided at the corresponding position of the bottom of the sealing ring. It is worth noting that the sealing ring has a unique L-shaped cross-section, and its horizontal part adopts an upward inclined structure. The entire sealing ring is tightly fixed to the inner wall of the paint tank. This structural design not only ensures the sealing performance, but also provides a specific path for the flow of paint. During the drying process of paint, the notch opened in the ring array at the bottom of the sealing ring forms the only channel for the paint to rise to the top of the support plate. The sealing ring is vertically half-sectioned into an L-shaped cross-section, and its upward inclined horizontal part forms a physical barrier during the drying stage, preventing hot air from entering the conveying port. The sealing ring as a whole is rigidly fixed to the inner wall of the paint tank, ensuring reliable sealing. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A three-dimensional view of the assembly structure of a motor coil insulation varnish impregnation and drying device after partial cross-section;

[0023] Figure 2 This is a three-dimensional view of the paint coating compartment after it has been cut open.

[0024] Figure 3 This is a three-dimensional structural diagram of a hydraulic push rod;

[0025] Figure 4 A three-dimensional structural diagram of the supporting components;

[0026] Figure 5 This is a three-dimensional structural diagram of the sealing cap;

[0027] Figure 6 This is a three-dimensional view of the intake sleeve section after it has been cut open.

[0028] Figure 7 This is a three-dimensional structural diagram of the rotating assembly;

[0029] Figure 8 This is a 3D structural diagram of a paint tank.

[0030] Figure label:

[0031] 1. Paint tank; 101. Movable hole; 102. Fixing port; 103. Support leg;

[0032] 2. Hydraulic push rod; 201. Push piston;

[0033] 3. Support components; 301. Support plate; 302. Insertion hole; 303. Conveyor port; 304. Sealing ring; 305. Notch;

[0034] 4. Sealing cap; 401. Rotary hole; 402. Connecting port; 403. Vent pipe; 404. Connecting plate; 405. Electric push rod;

[0035] 5. Inlet sleeve; 501. Connecting column; 502. Fixing frame; 503. Air inlet sleeve; 504. Fan; 505. Heating component;

[0036] 6. Rotating assembly; 601. Reducer; 602. Drive motor; 603. Rotating disk; 604. Support column; 605. Drive shaft; 606. Turntable; 607. Insert column; 608. Limiting net; 609. Protective ring;

[0037] 7. Paint touch-up compartment; 701. Fixed plate; 702. Support frame; 703. Viewing window; 704. Paint delivery pipe; 705. Electrically controlled valve one; 706. Air inlet pipe; 707. Electrically controlled valve two; 708. Connecting pipe; 709. Electrically controlled valve three. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Specific Implementation Example 1

[0040] Please see Figure 1-4This invention relates to an immersion and drying device for insulating varnish on motor coils, comprising a coating chamber 1, a hydraulic push rod 2, and a support assembly 3. The coating chamber 1 has a through-hole 101 at its bottom, which holds the insulating varnish for coil coating. The telescopic end of the hydraulic push rod 2 extends into the coating chamber 1 through the through-hole 101, and a push piston 201 is fixed at its end. The push piston 201 is movably connected to the inner wall of the coating chamber 1 to push the varnish flow. A support plate 301 is fixed to the upper part of the coating chamber 1, and a sealing ring 304 is provided at the top of the support plate 301. Together, they constitute a varnish conveying system. The surface of the support plate 301 has a ring array of... Multiple vertically penetrating conveying ports 303 are located within the enclosed space of the sealing ring 304. The upper part of the side wall of the paint tank 1 is provided with a fixing port 102, and the bottom is provided with stable support by a ring array of support legs 103. The top center of the support plate 301 has an insertion hole 302. The bottom of the sealing ring 304 has a ring-shaped distribution of notches 305 at the corresponding position. It is worth noting that the cross-section of the sealing ring 304 has a unique L-shaped design, and its horizontal part adopts an upward inclined structure. The entire sealing ring 304 is tightly fixed to the inner wall of the paint tank 1. This structural design not only ensures the sealing performance, but also provides a specific path for the flow of paint.

[0041] Specifically, the coating chamber 1 serves as the core container for coil insulation coating. The specialized paint it contains is used for immersion coating. The bottom of the coating chamber 1 is fixed with a ring-shaped array of legs 103, providing stable mechanical support and ensuring the equipment remains level on the working plane. The through-hole 101 at the bottom of the coating chamber 1 serves as a precision channel for the piston rod of the hydraulic push rod 2. The hydraulic push rod 2 drives the piston 201 to move up and down within the coating chamber 1. A high-precision fit between the piston 201 and the inner wall of the coating chamber 1 forms a dynamic sealing interface, effectively preventing paint leakage along the circumferential gap of the piston. During the piston's movement, precise liquid level control is achieved by squeezing the paint. The support plate 301 of the support assembly 3 is fixed to the upper part of the coating chamber 1, and it is connected to the bottom of the turntable 606 through a central insertion hole 302. The insertion post 607 at the end engages to achieve radial positioning of the turntable 606, while also supporting the turntable 606 and the rotor (including the wound coil) placed on it, ensuring that the coil is immersed in the paint during the coating operation. The conveying ports 303 arranged in a ring array on the surface of the support plate 301 form a bidirectional flow channel for the paint: during coating, the paint rises through this port to the top surface of the support plate 301, and during draining, excess paint flows back to the bottom of the chamber. The sealing ring 304 is fixed to the top of the support plate 301 and extends to the inner wall of the coating chamber 1, playing a dual role in the drying stage: its L-shaped inclined structure forms an airflow barrier to prevent hot air from directly entering the conveying port 303 and causing heat loss, while the notches 305 in the ring array at the bottom form the upward path of the paint, and during coating, the paint overflows through this notch 305 to the space above the support plate 301.

[0042] Furthermore, after the coil to be processed is placed on the turntable 606, the turntable 606 descends to the surface of the support plate 301, completing the initial positioning. At this time, the hydraulic system is activated, and the hydraulic push rod 2 begins to work, pushing the piston 201 to slowly rise from the bottom of the paint tank 1. The upward movement of the piston generates uniform pressure on the paint in the tank, causing the paint level to rise accordingly. The paint first enters the sealed chamber formed by the support plate 301, the sealing ring 304, and the inner wall of the paint tank 1 through the annularly distributed conveying ports 303 on the support plate 301. Under the continuous action of hydraulic pressure, the paint further overflows through the inclined notch 305 at the bottom of the sealing ring 304. As the liquid level rises, the coil on the turntable 606 is completely immersed in the insulating varnish and undergoes a 20-second impregnation process. After impregnation, the hydraulic push rod 2 reverses its direction, driving the piston 201 to descend smoothly. At this time, the varnish above the support plate 301, under the influence of gravity, is guided by the notch 305 of the sealed ring 304 and returns to the varnish storage chamber below the support plate 301 through the delivery port 303. The entire reflux process continues until the piston 201 returns to the initial position at the bottom of the varnish chamber 1, marking the end of a complete varnishing cycle. Specific Implementation Example 2

[0044] Please see Figure 1 , 4 5, 6, 7. Based on the specific embodiment one, the paint tank 1 is the core container, with a through hole 101 at its bottom. The upper part of the paint tank 1 is fixedly installed with a support component 3. The support component 3 includes a support plate 301 and a sealing ring 304. The support plate 301 has vertically arranged conveying ports 303 in a ring array. All conveying ports 303 are located within the coverage area of ​​the sealing ring 304. The top center of the support plate 301 has an insertion hole 302. The bottom of the sealing ring 304 has notches 305 in a ring array. The sealing ring 304 has an L-shaped cross section after being vertically half-sectioned, and the horizontal part is inclined upward. Its outer edge is fixedly connected to the inner wall of the paint tank 1.

[0045] A sealing cover 4 covers the top of the paint tank 1. A rotating hole 401 is opened in the center of the top of the sealing cover 4. A connecting port 402 is opened through the top of the sealing cover 4 on one side of the rotating hole 401. The sealing cover 4 is fixedly connected to the telescopic end of the electric push rod 405 through the connecting plate 404 of the annular array to realize the lifting function. The vent pipe 403 installed at the top is connected to the external ventilation equipment. The bottom end of the air inlet sleeve 5 is fixed to the top surface of the sealing cover 4 above the connecting port 402. Multiple sets of fixing frames 502 are fixed to the inner wall of the air inlet sleeve 5 through the connecting column 501 of the annular array. Each fixing frame 502 together carries the heating component 505. The top of the air inlet sleeve 5 is fixedly connected to the air inlet sleeve 503, and a fan 504 is installed inside it.

[0046] The drive shaft 605 of the rotating assembly 6 is movably connected through the rotating hole 401, and the bottom end of the rotating assembly 606 is fixed to the turntable 606. The center of the bottom end of the turntable 606 is fixed to the insertion post 607. The insertion post 607 is inserted into the insertion hole 302 of the support plate 301 to achieve positioning. The entire turntable 606 is located within the sealing ring 304. The top edge of the turntable 606 is fixed to the limiting net 608, and the top of the limiting net 608 is fixed to the protective ring 609. The top of the drive shaft 605 is fixedly connected to the rotating disk 603. The top of the rotating disk 603 is connected to the output end of the reducer 601. The top of the reducer 601 is fixed to the drive motor 602, and the output ends of the two are linked. The bottom of the reducer 601 is fixed to the top of the sealing cover 4 through the support column 604 fixed by the bottom ring array.

[0047] Specifically, the sealing cover 4 seals the top of the paint chamber 1, and its rotating hole 401 forms a movable connection with the drive shaft 605. The connecting port 402 on the sealing cover 4 connects the internal space of the paint chamber 1 with the air inlet sleeve 5 fixed to its top. The vent pipe 403 is fixed to the top of the sealing cover 4 and connected to the external exhaust equipment. During the drying stage, it is used to exhaust hot air containing volatile solvents. The telescopic end of the electric push rod 405 is fixed to the connecting plate 404. The overall lifting and lowering movement of the sealing cover 4 is achieved by driving the connecting plate 404 to rise and fall. A fan 504 is fixedly installed in the air inlet sleeve 503 at the top of the air inlet sleeve 5. When the fan 504 is started, it draws in external air from the top of the air inlet sleeve 503 and blows it downward into the cavity of the air inlet sleeve 5. The connecting columns 501 fixed in a ring array on the inner wall of the air intake sleeve 5 support the fixed frame 502. The heating component 505 installed in the fixed frame 502 is used to heat the air flowing through the air intake sleeve 5. The bottom end of the reducer 601 is supported and fixed to the top of the sealing cover 4 by the support columns 604 fixed in a ring array. The reducer 601 receives the power of the drive motor 602, changes the torque and speed, and drives the rotating disk 603 connected to its output end to rotate. The rotating disk 603 supports and transmits the output power of the reducer 601, drives the drive shaft 605 fixed to its bottom end to rotate, and then drives the turntable 606 at the bottom end of the drive shaft 605 to rotate, and finally drives the painted mover placed on the turntable 606 to rotate.

[0048] Further, firstly, the electric push rod 405 is activated, which drives the connecting plate 404 and the sealing cover 4 to rise. During the rise of the sealing cover 4, the entire rotating assembly 6 is driven to rise until the upper edge of the protective ring 609 contained in the rotating assembly 6 is flush with the top of the paint chamber 1. At this time, the operator puts the motor mover with the coil wound on it from above the protective ring 609, places it on the top of the turntable 606, and pushes it to contact and position it with the inner side of the limiting net 608 at the top of the turntable 606. Then, the electric push rod 405 is activated again to drive the sealing cover 4 to descend. The sealing cover 4 descends until it completely covers the top of the paint chamber 1. During this process, the insertion post 607 at the center of the bottom of the turntable 606 is inserted into the insertion hole 302 at the top of the support plate 301 to achieve precise positioning. At the same time, the entire turntable 606 enters the internal space of the sealing ring 304, and the equipment is ready for painting operation.

[0049] After the painting work is completed, wait for a preset time of 1 minute to allow excess paint to flow back into the paint chamber 1 below the support plate 301. Then start the drive motor 602, which drives the reducer 601 to rotate. The reducer 601 drives the rotating plate 603 and the drive shaft 605 to rotate. The drive shaft 605 transmits power to the turntable 606, causing the turntable 606 and the motor mover on it to rotate rapidly for 3 minutes. The centrifugal force is used to throw off the excess paint on the surface of the mover to achieve drying.

[0050] After draining, keep the drive motor 602 running but reduce its speed so that the turntable 606 drives the mover to rotate slowly to facilitate uniform heating. At the same time, start the heating component 505 in the air inlet sleeve 5 and the fan 504 in the air inlet sleeve 503. The fan 504 draws outside air into the air inlet sleeve 503 and presses it into the air inlet sleeve 5 cavity. When the air flows through the air inlet sleeve 5, it is heated by the heating component 505 in the fixed frame 502 and becomes hot air. The hot air enters the paint coating chamber 1 through the communication port 402 of the sealing cover 4 and blows on the motor mover and its coil at the top of the slowly rotating turntable 606 to accelerate the evaporation of solvent in the insulating paint and achieve the drying and curing of the paint film.

[0051] Hot air containing solvent vapor generated during the drying process rises to the top of the coating chamber 1 and is drawn to an external exhaust device for centralized treatment via the vent pipe 403 at the top of the sealing cover 4. The drying continues for a preset time until the insulating varnish on the coil of the rotor is completely dried and cured. After drying, the electric push rod 405 is activated to drive the connecting plate 404 and the sealing cover 4 to rise, which in turn drives the entire rotating assembly 6 to rise until the upper edge of the protective ring 609 is flush with the top of the coating chamber 1 again. At this time, the operator can remove the rotor and its coil that have been coated and dried from the top of the turntable 606. This completes a complete coating (immersion, draining) and drying cycle. The notches 305 in the annular array at the bottom of the sealing ring 304 form the only channel for the paint to rise to the top of the support plate 301. The sealing ring 304 is vertically half-sectioned into an L-shaped section. Its upward-sloping horizontal part forms a physical barrier during the drying stage, preventing hot air from entering the conveying port 303. The sealing ring 304 is rigidly fixed to the inner wall of the coating chamber 1 to ensure reliable sealing. Specific Implementation Example 3

[0053] Please see Figure 1 , 8 Based on specific embodiments one and two, a touch-up paint chamber 7 is located on one side of the paint chamber 1. Its bottom is supported by a fixing plate 701 and a support frame 702. A viewing window 703 is fixedly fixed through the center of the top of the touch-up paint chamber 7. A paint delivery pipe 704 is fixedly fixedly connected to the top of the touch-up paint chamber 7 on one side of the viewing window 703. An electrically controlled valve 705 is installed around the periphery of the paint delivery pipe 704. The top of the paint delivery pipe 704 is connected to an external insulating varnish replenishment pipeline. A vent pipe 706 is fixedly connected to the top of the touch-up paint chamber 7 at an axially symmetrical position to the paint delivery pipe 704. An electrically controlled valve 707 is installed around the periphery of the vent pipe 706. The top of the vent pipe 706 is connected to an external exhaust device. A connecting pipe 708 is fixedly connected to the lower periphery of the touch-up paint chamber 7. The end of the connecting pipe 708 away from the touch-up paint chamber 7 is fixed in a fixing port 102 on the upper side wall of the paint chamber 1. An electrically controlled valve 709 installed around the connecting pipe 708 controls the flow of paint between the two chambers.

[0054] Specifically, the touch-up paint tank 7 serves as an auxiliary paint storage unit for the paint tank 1, storing insulating paint for replenishment. A fixing plate 701 rigidly connects the bottom of the touch-up paint tank 7 to the support frame 702, which stably supports the entire touch-up paint tank system on the working plane. A viewing window 703 installed at the top of the touch-up paint tank 7 provides a visual observation window for real-time monitoring of paint level changes within the tank. The paint delivery pipe 704 at the top of the touch-up paint tank 7 serves as an interface for external paint supply pipes, and the opening and closing of the solenoid valve 705 precisely controls the flow of new paint to the touch-up paint tank 7. Symmetrically arranged... The air inlet pipe 706 is connected to the external ventilation equipment. The dynamic balance of the air pressure inside the paint touch-up tank 7 is achieved by controlling the opening and closing of the electric control valve 707. When the liquid level in the paint touch-up tank 7 changes, the air inlet pipe 706 can introduce or discharge air to ensure that the paint touch-up tank 7 always maintains a standard atmospheric pressure environment, avoiding negative pressure from hindering the flow of paint or positive pressure from causing leakage. The lower part of the side wall of the paint touch-up tank 7 is sealed to the fixed port 102 on the side wall of the paint coating tank 1 through the connecting pipe 708. The electric control valve 709 installed on the connecting pipe 708 precisely controls the opening and closing of the paint delivery path between the paint coating tank 1 and the paint touch-up tank 7.

[0055] Furthermore, when the level of insulating varnish in the coating chamber 1 is insufficient, a touch-up varnishing operation needs to be initiated. The specific process is as follows: First, the hydraulic push rod 2 is activated to drive the piston 201 to rise to a preset height within the coating chamber 1, reserving space for varnish replenishment. Then, the electrically controlled valve 3 709 on the connecting pipe 708, the electrically controlled valve 1 705 on the varnish delivery pipe 704, and the electrically controlled valve 2 707 on the air inlet pipe 706 are opened simultaneously. This operation creates a communicating vessel effect, and the varnish in the touch-up varnish chamber 7 flows to the coating chamber 1 through the connecting pipe 708 under the action of gravity; at the same time, the external varnish supply system delivers varnish through the connecting pipe 708. Pipe 704 continuously replenishes new paint to the paint tank 7, while the connection between the air inlet pipe 706 and the exhaust equipment maintains a constant air pressure (standard atmospheric pressure) inside the paint tank 7, preventing negative pressure from hindering the flow of paint. The operator monitors the liquid level in the tank in real time through the viewing window 703 at the top of the paint tank 7. When the paint reaches the preset height, the operator closes the first solenoid valve 705, the second solenoid valve 707, and the third solenoid valve 709 in sequence to cut off the paint delivery and air pressure balance channels. Finally, the hydraulic push rod 2 is activated to drive the piston 201 down to the initial position at the bottom of the paint tank 1, completing the paint replenishment operation.

[0056] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A device for impregnating and drying insulating varnish on motor coils, comprising: The coating chamber (1) has a through hole (101) at the bottom and contains the coating material for coil insulating varnish. Hydraulic push rod (2), the telescopic end of the hydraulic push rod (2) is fixed with a push piston (201) for pushing the insulating varnish in the paint coating chamber (1), the push piston (201) is movably connected in the paint coating chamber (1); The support assembly (3) includes a support plate (301), a conveying port (303) and a sealing ring (304). The upper part of the paint tank (1) is fixed with the support plate (301), and the top of the support plate (301) is fixed with a sealing ring (304). The support plate (301) has a vertically through-hole conveying port (303) arranged in a ring array inside the support plate (301). The conveying port (303) is located inside the sealing ring (304). A sealing cap (4) has a rotating hole (401) at the center of its top end, and a connecting port (402) is provided inside the sealing cap (4) on one side of the rotating hole (401). An air intake sleeve (5) is provided inside the air intake sleeve (5), the bottom end of which is fixed to the top of the sealing cover (4) outside the connecting port (402). A heating component (505) is provided inside the air intake sleeve (5). The rotating assembly (6) includes a drive shaft (605), a turntable (606), and a limiting mesh (608). The drive shaft (605) is movably connected through the rotating hole (401). The turntable (606) is fixed at the bottom end of the drive shaft (605), and the limiting mesh (608) is fixed at the edge of the top end of the turntable (606).

2. The device for impregnating and drying motor coil insulating varnish according to claim 1, characterized in that: The upper part of the paint tank (1) is provided with a fixing port (102), and the bottom end of the paint tank (1) is fixed with support legs (103) in a ring array. The telescopic end of the hydraulic push rod (2) passes through the movable hole (101).

3. The motor coil insulating varnish immersion and drying device according to claim 1, characterized in that: The support component (3) also includes a socket (302) and a notch (305). The socket (302) is provided at the center of the top of the support plate (301). The notch (305) is provided in a ring array at the bottom of the sealing ring (304). After the sealing ring (304) is vertically half-sectioned, the half-section is set in an L shape, and the horizontal part is inclined upward. The sealing ring (304) is fixed on the inner wall of the paint tank (1).

4. The motor coil insulating varnish immersion and drying device according to claim 1, characterized in that: The sealing cover (4) is movably connected to the top of the paint tank (1). The top of the sealing cover (4) is fixedly connected to a vent pipe (403), and the top of the vent pipe (403) is fixedly connected to a ventilation device. The sealing cover (4) is surrounded by a ring array of connecting plates (404). Each connecting plate (404) is provided with an electric push rod (405) below it. The telescopic ends of the electric push rods (405) are fixed to the connecting plates (404).

5. The motor coil insulating varnish immersion and drying device according to claim 1, characterized in that: The inner wall of the air intake sleeve (5) is fixed with connecting columns (501) in a ring array. Each connecting column (501) is fixed with a fixing frame (502) at one end near the central axis of the air intake sleeve (5). A heating component (505) is fixedly installed in all the fixing frames (502). The top of the air intake sleeve (5) is fixedly connected to an air intake sleeve (503). A fan (504) is fixed inside the air intake sleeve (503).

6. The motor coil insulating varnish immersion and drying device according to claim 3, characterized in that: The rotating assembly (6) further includes a post (607) and a protective ring (609). The post (607) is fixed at the center of the bottom end of the turntable (606). The post (607) is inserted into the insertion hole (302). The turntable (606) is set in the sealing ring (304). The protective ring (609) is fixed at the top of the limiting net (608).

7. The motor coil insulating varnish impregnation and drying device according to claim 1, characterized in that: The rotating assembly (6) further includes a speed reducer (601), a drive motor (602), a rotating disk (603), and a support column (604). The output end of the speed reducer (601) is fixed to the rotating disk (603). The bottom end of the rotating disk (603) is fixed to the top end of the drive shaft (605). The bottom end of the speed reducer (601) outside the rotating disk (603) is fixed to the support column (604) in a ring array. The bottom end of the support column (604) is fixed to the top end of the sealing cover (4). The top end of the speed reducer (601) is fixed to the drive motor (602). The output end of the drive motor (602) is fixed to the power input end of the speed reducer (601).

8. The motor coil insulating varnish immersion and drying device according to claim 2, characterized in that: A touch-up paint compartment (7) is provided on one side of the paint compartment (1). A viewing window (703) is fixed through the center of the top of the touch-up paint compartment (7). A connecting pipe (708) is fixedly connected to the lower part of the periphery of the touch-up paint compartment (7). The end of the connecting pipe (708) away from the touch-up paint compartment (7) is fixed in the fixing port (102). An electric control valve (709) is fixed on the periphery of the connecting pipe (708).

9. The motor coil insulating varnish immersion and drying device according to claim 8, characterized in that: A paint supply pipe (704) is fixedly connected to one side of the viewing window (703) at the top of the paint supply tank (7). An electric control valve (705) is fixedly connected to the periphery of the paint supply pipe (704). The top of the paint supply pipe (704) is fixedly connected to the pipeline for replenishing insulating paint. A gas inlet pipe (706) is fixedly connected to the top of the paint supply tank (7) at a position symmetrical to the paint supply pipe (704). The top of the gas inlet pipe (706) is fixedly connected to the exhaust device. An electric control valve (707) is fixedly connected to the periphery of the gas inlet pipe (706).

10. The motor coil insulating varnish impregnation and drying device according to claim 8, characterized in that: The bottom end of the paint touch-up compartment (7) is fixed with a fixing plate (701), and the bottom end of the fixing plate (701) is fixed with a support frame (702).

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