Stator paint dipping device

Abstract

The invention relates to the technical field of motor stator processing, in particular to a stator paint dipping device which comprises a frame and a paint pool. A frame body of the frame is provided with a plurality of liquid inlet gaps, the frame body of the frame can enter the paint pool, an ejector rod is arranged in the paint pool, and the ejector rod can penetrate through the liquid inlet gaps from the bottom of the frame. The stator is flatly placed in the frame, and the windings at the two ends of the stator are ensured not to be in contact with the frame, so that the windings can be wrapped by insulating paint in all directions when the stator is immersed into a paint pool. Meanwhile, an ejector rod is arranged in the paint pool, and after the frame carries the stator to enter the paint pool, the ejector rod can penetrate through the frame to abut against one end of the stator iron core, so that the stator is in an inclined state in the paint liquid, air remaining in the stator is effectively exhausted, and it is ensured that insulating paint fully permeates into the whole winding.

Description

Technical Field

[0001] This invention relates to the field of motor stator processing technology, and in particular to a stator impregnation apparatus. Background Technology

[0002] Stator impregnation is a key process in motor manufacturing. By immersing the stator in insulating varnish, its electrical insulation performance, moisture and corrosion resistance, mechanical strength, and heat dissipation efficiency are enhanced. Stator impregnation mainly includes three methods: casting, immersion, and vacuum pressure impregnation. Casting is suitable for single-unit or sporadic repair work; immersion is suitable for mass production of small and medium-sized motors; and vacuum pressure impregnation is suitable for large motor production. In the immersion method, the stator is usually placed vertically to expel internal air and allow the insulating varnish to naturally cover the windings. However, this method also makes it difficult for the windings at the bottom of the stator, which contact the frame, to be fully coated with insulating varnish. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a stator impregnation device that enables the insulating varnish to fully coat the stator winding.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a stator impregnation device, comprising a frame and a paint tank;

[0005] The frame includes a connecting block and multiple U-shaped tubes, each U-shaped tube facing the same direction and arranged in a parallel and spaced manner to form a frame with multiple liquid inlet gaps. The ends of each U-shaped tube are connected by the connecting block. The frame can enter the paint tank. The frame is provided with a positioning plate, which divides the inner cavity of the frame into multiple positioning spaces. The paint tank is provided with a top rod, which can pass through the liquid inlet gaps from the bottom of the frame.

[0006] Furthermore, the aforementioned stator impregnation device also includes a lifter, wherein the paint pool is disposed on the movable end of the lifter, and the lifter is used to drive the paint pool to move toward the frame.

[0007] Furthermore, the lifting device includes a bracket, a motor, and a lead screw; the paint tank is mounted on the bracket, the bracket is threadedly connected to the lead screw, and the output shaft of the motor is drivenly connected to the lead screw.

[0008] Furthermore, the lifter also includes a guide rod, and the bracket is slidably mounted on the guide rod.

[0009] Furthermore, the bottom installation height of the outer U-shaped tube of the frame is higher than the bottom installation height of the inner U-shaped tube of the frame.

[0010] Furthermore, the aforementioned stator impregnation device also includes a chain conveyor belt and a drying oven. The frame is connected to the conveyor chain of the chain conveyor belt. The chain conveyor belt is arranged in sequence along its own conveying direction as a pre-drying zone, an impregnation zone, and a gelation zone. The drying oven is arranged in the pre-drying zone and the gelation zone, and the paint tank is arranged in the impregnation zone.

[0011] Furthermore, the aforementioned stator impregnation device also includes a tank, a liquid pump is provided in the tank, the outlet pipe of the liquid pump is connected to the paint tank, and a solenoid valve is provided on the connection pipe between the liquid pump and the paint tank.

[0012] Furthermore, a liquid level sensor is provided at the opening of the paint tank, and the liquid level sensor is communicatively connected to the liquid pump and the solenoid valve respectively.

[0013] The beneficial effects of this invention are as follows: by arranging multiple U-shaped tubes in a parallel and spaced manner to form a frame with multiple liquid inlet gaps, and setting a top rod in the varnish pool, when the frame carries the stator into the varnish pool, the top rod can pass through the liquid inlet gap from the bottom of the frame and hold one end of the stator core, causing the stator to be tilted in the varnish, thereby effectively expelling the air stored inside and ensuring that the insulating varnish fully penetrates the entire winding; at the same time, the positioning plate is used to plan the placement position of the stator in the frame to ensure that the top rod can smoothly lift the stator to achieve the above-mentioned tilted state. Attached Figure Description

[0014] Figure 1 This is a schematic cross-sectional view of a stator impregnation device proposed in this invention. Figure 2 This is a schematic diagram of the lifting device structure of a stator impregnation apparatus proposed in this invention; Figure 3 This is a schematic diagram of the bracket structure of a stator impregnation device proposed in this invention; Figure 4 This is a schematic diagram of the connection structure between the paint tank and the reservoir in a stator impregnation device proposed in this invention; Figure 5 for Figure 4 Enlarged view of part A of a stator impregnation apparatus; Label Explanation: 1. Frame; 11. Connecting block; 12. U-shaped tube; 13. Positioning plate; 2. Paint tank; 21. Top rod; 22. Liquid level sensor; 3. Lifting device; 31. Bracket; 32. Motor; 33. Lead screw; 34. Guide rod; 4. Chain conveyor belt; 5. Drying oven; 6. Storage tank; 61. Liquid pump; 62. Solenoid valve. Detailed Implementation

[0015] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0016] Stator impregnation is a key process in motor manufacturing. By immersing the stator in insulating varnish, its electrical insulation performance, moisture and corrosion resistance, mechanical strength, and heat dissipation efficiency are enhanced. Stator impregnation mainly includes three methods: casting, immersion, and vacuum pressure impregnation. Casting is suitable for single-unit or sporadic repair work; immersion is suitable for mass production of small and medium-sized motors; and vacuum pressure impregnation is suitable for large motor production. In the immersion method, the stator is usually placed vertically to expel internal air and allow the insulating varnish to naturally cover the windings. However, this method also makes it difficult for the windings at the bottom of the stator, which contact the frame, to be fully coated with insulating varnish. In this embodiment, the stator is placed flat inside the frame 1, ensuring that neither of its two windings is in contact with the frame 1. Then, a chain conveyor belt 4 drives the frame 1 to carry the stator into the drying oven 5 for pre-drying to remove moisture from the stator. Next, the chain conveyor belt 4 transports the stator above the varnish tank 2. The varnish tank 2 is brought closer to the frame 1 via a lifter 3, allowing the stator to be gradually coated with insulating varnish. A push rod 21 inside the varnish tank 2 passes through the frame 1 and supports one end of the stator core, causing the stator to tilt in the varnish, effectively expelling any remaining air and ensuring the insulating varnish fully penetrates the entire winding. Finally, the chain conveyor belt 4 sends the stator into another drying oven 5 for curing and drying, thus completing the stator impregnation process.

[0017] Please refer to Figures 1 to 3 As shown, the present invention provides a stator impregnation device, comprising a frame 1 and a paint tank 2; the frame 1 has a plurality of liquid inlet gaps, the frame 1 can enter the paint tank 2, and a top rod 21 is provided in the paint tank 2, the top rod 21 can pass through the liquid inlet gaps from the bottom of the frame 1.

[0018] Working principle: The stator is placed flat inside the frame 1, with the outer surface of the stator core in contact with the bottom surface of the inner cavity of the frame 1. This ensures that the windings at both ends of the stator are not in contact with the frame 1, allowing the insulating varnish to completely coat the windings when the stator is immersed in the varnish bath 2. Simultaneously, a push rod 21 is installed inside the varnish bath 2. When the frame 1 carries the stator into the varnish bath 2, the push rod 21 passes through the frame 1 and supports one end of the stator core, causing the stator to tilt in the varnish solution. This effectively removes any air trapped inside and ensures that the insulating varnish fully penetrates the entire winding.

[0019] It is worth noting that after the top rod 21 stabilizes the stator, the angle between the stator axis and the bottom surface of the frame 1 is 10° to 20° to avoid excessive tilting of the stator, which would cause the winding at one end of the stator to re-contact the frame 1 and reduce the depth of the insulating varnish in the varnish pool 2.

[0020] In some implementations, please refer to Figure 2 As shown, the aforementioned stator impregnation device further includes a lifter 3. The paint tank 2 is disposed on the movable end of the lifter 3, and the lifter 3 is used to drive the paint tank 2 toward the frame 1. The lifter 3 is used to drive the paint tank 2 toward and away from the frame 1.

[0021] For details, please refer to Figure 2 As shown, the lifting device 3 includes a bracket 31, a motor 32, and a lead screw 33; the paint tank 2 is mounted on the bracket 31, the bracket 31 is threadedly connected to the lead screw 33, and the output shaft of the motor 32 is drively connected to the lead screw 33. The motor drives the lead screw 33 to rotate forward and backward, thereby driving the bracket 31 to move the paint tank 2 closer to and further away from the frame 1.

[0022] Further, please refer to Figure 2 As shown, the lifting device 3 also includes a guide rod 34, and the bracket 31 is slidably mounted on the body of the guide rod 34. The guide rod 34 is used to ensure the direction of movement of the bracket 31 carrying the paint tank 2, so as to ensure that the top rod 21 can smoothly lift the stator.

[0023] In some implementations, please refer to Figure 3 As shown, the frame 1 includes a connecting block 11 and multiple U-shaped tubes 12. Each U-shaped tube 12 faces the same direction and is arranged in a parallel and spaced manner. The ends of each U-shaped tube 12 are connected to each other through the connecting block 11. The main body of the frame 1 is constructed of multiple U-shaped tubes 12 to facilitate the entry of insulating varnish from the varnish pool 2 into the frame 1.

[0024] In some implementations, please refer to Figure 3 As shown, since the stator is placed flat inside the frame 1, the bottom installation height of the U-shaped tube 12 on the outside of the frame 1 is limited to be higher than the bottom installation height of the U-shaped tube 12 inside the frame 1 to prevent the stator from rolling off the frame 1.

[0025] In some implementations, please refer to Figure 3 As shown, the frame 1 is provided with multiple positioning plates 13, which divide the inner cavity of the frame 1 into multiple positioning spaces. The positioning plates 13 are used to plan the placement of the stator within the frame 1, so as to ensure that the push rod 21 can smoothly lift the stator into an inclined state in the paint liquid.

[0026] In some implementations, please refer to Figure 1As shown, the stator impregnation device described above also includes a chain conveyor belt 4 and a drying oven 5. The frame 1 is connected to the conveyor chain of the chain conveyor belt 4. The chain conveyor belt 4 is arranged with a pre-drying zone, an impregnation zone, and a gelation zone in sequence along its own conveying direction. The drying oven 5 is located in the pre-drying zone and the gelation zone, and the paint tank 2 is located in the impregnation zone. The chain conveyor belt 4 can drive the stator to first enter the drying oven 5 in the pre-drying zone for drying to remove moisture from the stator; then the chain conveyor belt 4 transports the stator to the paint tank 2 in the impregnation zone for impregnation; finally, it is transported to the drying oven 5 in the gelation zone for curing and drying.

[0027] It is worth noting that the temperature inside the drying oven 5 in the pre-drying zone is controlled at 120℃ to 130℃, and the drying time is 1 to 2 hours. The stator is immersed in the varnish bath 2 for 10 to 25 minutes. After the stator is removed from the varnish bath 2, it needs to remain above the varnish bath 2 for 15 to 30 minutes to allow excess insulating varnish on the stator to drip dry. The temperature inside the drying oven 5 in the gelation zone is controlled at 140℃ to 150℃, and the drying time is 2 to 3 hours.

[0028] When the chain conveyor belt 4 drives the stator into the impregnation zone for impregnation, it can either drive the varnish pool 2 to move so that the stator is immersed in the insulating varnish, or it can directly transport the stator into the varnish pool 2 through the transmission chain of the chain conveyor belt 4 so that the stator is immersed in the insulating varnish.

[0029] In some implementations, please refer to Figure 4 and Figure 5 As shown, the aforementioned stator impregnation device further includes a tank 6, within which a liquid pump 61 is installed. The outlet pipe of the liquid pump 61 is connected to a paint tank 2, and a solenoid valve 62 is installed on the connection pipe between the liquid pump 61 and the paint tank 2. The liquid pump 61 can replenish the insulating varnish in the tank 6 into the paint tank 2, while the solenoid valve 62 prevents the insulating varnish in the paint tank 2 from flowing back into the tank 6.

[0030] It is worth noting that if the paint tank 2 is moved by a drive for impregnation, the connection between the liquid pump 61 and the paint tank 2 needs to be a flexible hose to ensure the normal movement of the paint tank 2, and the solenoid valve 62 is mounted on a metal pipe. If the frame 1 is driven into the paint tank 2 for impregnation, the connection between the liquid pump 61 and the paint tank 2 can be a simple metal pipe.

[0031] In some implementations, please refer to Figure 2As shown, a liquid level sensor 22 is installed at the opening of the varnish tank 2. The liquid level sensor 22 is communicatively connected to the liquid pump 61 and the solenoid valve 62. The liquid level sensor 22 monitors the level of insulating varnish in the varnish tank 2 in real time. When the level of insulating varnish in the varnish tank 2 is lower than a set range value, the solenoid valve 62 opens, so that the liquid pump 61 can replenish the insulating varnish in the tank 6 into the varnish tank 2, thereby ensuring the impregnation effect of the insulating varnish in the varnish tank 2 on the stator.

[0032] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A stator impregnation apparatus, characterized in that: Includes the frame and paint pool; The frame includes a connecting block and multiple U-shaped tubes, each U-shaped tube facing the same direction and arranged in a parallel and spaced manner to form a frame with multiple liquid inlet gaps. The ends of each U-shaped tube are connected by the connecting block. The frame can enter the paint tank. The frame is provided with a positioning plate, which divides the inner cavity of the frame into multiple positioning spaces. The paint tank is provided with a top rod, which can pass through the liquid inlet gaps from the bottom of the frame.

2. The stator impregnation apparatus according to claim 1, characterized in that: It also includes a lifter, with the paint tank disposed on the movable end of the lifter, the lifter being used to drive the paint tank to move toward the frame.

3. The stator impregnation apparatus according to claim 2, characterized in that: The lifting device includes a bracket, a motor, and a lead screw; the paint tank is mounted on the bracket, the bracket is threadedly connected to the lead screw, and the output shaft of the motor is drivenly connected to the lead screw.

4. The stator impregnation apparatus according to claim 3, characterized in that: The lifter also includes a guide rod, and the bracket is slidably mounted on the guide rod.

5. The stator impregnation apparatus according to claim 1, characterized in that: The bottom installation height of the U-shaped tube on the outer side of the frame is higher than the bottom installation height of the U-shaped tube inside the frame.

6. The stator impregnation apparatus according to claim 1, characterized in that: It also includes a chain conveyor belt and a drying oven. The frame is connected to the conveyor chain of the chain conveyor belt. The chain conveyor belt is arranged in sequence along its own conveying direction as a pre-drying zone, a dipping zone, and a gelling zone. The drying oven is located in the pre-drying zone and the gelling zone, and the paint tank is located in the dipping zone.

7. The stator impregnation apparatus according to claim 1, characterized in that: It also includes a reservoir, which is equipped with a liquid pump. The outlet pipe of the liquid pump is connected to the paint tank, and a solenoid valve is installed on the connection pipe between the liquid pump and the paint tank.

8. The stator impregnation apparatus according to claim 7, characterized in that: A liquid level sensor is installed at the opening of the paint tank, and the liquid level sensor is communicatively connected to the liquid pump and the solenoid valve.

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