Coating system for stator winding

Abstract

The utility model discloses a coating system of a stator winding, which comprises a workbench, a coating device and a control device, wherein the workbench is provided with a through hole; an opening of the fluidization cylinder is matched with the through hole; the annular rotating mechanism is installed on the workbench, and the annular rotating mechanism is matched with the through hole; the rotary driver is used for driving the annular rotary mechanism to rotate and is matched with the annular rotary mechanism; the stirrer is used for stirring the powder, the stirrer is fixed with the annular rotating mechanism, and one part of the stirrer is suspended in the fluidization cylinder. According to the utility model, the powder coated on the stator winding is in a movable state, so that the winding can be uniformly coated by the powder.

Description

Technical Field

[0001] This utility model relates to the field of motor stator manufacturing, and specifically to a coating system for stator windings. Background Technology

[0002] The coating process in motor stators utilizes high-precision motion and angle control on equipment to achieve fine coating of the product surface. Its main function is to coat the motor coil surface with an insulating layer, thereby increasing the thickness and strength of the insulation material and improving the motor's insulation and safety performance. Coating enhances insulation performance, effectively preventing partial discharge and thus improving motor reliability. It also significantly strengthens the mechanical properties of the windings, reducing wear and aging.

[0003] The current coating process has the following problems:

[0004] First, the powder is in a static state in the container, which makes it difficult to coat the stator winding evenly.

[0005] Secondly, traditional powder feeding methods often suffer from problems such as slow reaction speed, low precision, and inability to adapt to fluctuations in fluidization state. Summary of the Invention

[0006] This invention provides a coating system for stator windings, which enables the powder coated on the stator windings to be in an active state, thereby allowing the powder to form a uniform coating on the windings.

[0007] A coating system for stator windings, comprising:

[0008] The worktable has through holes.

[0009] Fluidizing cylinder, the opening of the fluidizing cylinder matches the through hole;

[0010] A ring-shaped rotary mechanism is mounted on the worktable and mates with a through hole.

[0011] A rotary drive that drives the annular rotary mechanism to rotate; the rotary drive works in conjunction with the annular rotary mechanism.

[0012] An agitator for mixing powder materials, the agitator is fixed to an annular rotary mechanism, and a part of the agitator is suspended inside a fluidizing cylinder.

[0013] Furthermore, the annular rotary mechanism includes:

[0014] The intermediate rotating ring cooperates with the worktable, and gears are provided on the circumference of the intermediate rotating ring;

[0015] The bearing housing surrounds the central rotating ring and is fixed to the worktable. The bearing housing has a clearance opening through which the rotary drive passes to engage with the gear.

[0016] The bearing is located between the intermediate rotating ring and the bearing housing, and the bearing mates with both the intermediate rotating ring and the bearing housing.

[0017] Furthermore, the gear protrudes from the circumference of the intermediate rotating ring, forming a first step between the gear and the intermediate rotating ring. A first protrusion is provided on the inner wall of the bearing housing, forming a first step between the first protrusion and the bearing housing. The bearing mates with the first step and the first step respectively.

[0018] Furthermore, one end of the intermediate rotating ring is provided with a first extension, which is inserted into the through hole, and the lower end of the intermediate rotating ring is in clearance fit with the surface of the worktable.

[0019] The other end of the intermediate rotating ring is provided with a second extension, and a pressure cap is provided on the bearing seat. After the pressure cap is pressed on the upper end of the intermediate rotating ring, the pressure cap and the second extension are in clearance fit.

[0020] Furthermore, the rotary drive includes a support, a motor, and a gear. The support is fixed to the worktable, the motor is mounted on the support, the gear is connected to the torque output end of the motor, and the gear cooperates with the annular rotary mechanism.

[0021] Furthermore, the agitator includes a connecting plate, a support ring, a stirring bar, and a bridging component. One end of the connecting plate is fixed to the annular rotating mechanism, and the other end of the connecting plate is fixed to the support ring. One end of the stirring bar is connected to the support ring, and the other end of the stirring bar is connected to the bridging component. The support ring surrounds the bridging component, and the axial direction of the bridging component is on the same straight line as the axial direction of the fluidizing cylinder.

[0022] Furthermore, the fluidizing cylinder includes a fluidizing cylinder body and a gas chamber, with openings at both ends of the fluidizing cylinder body, and the fluidizing cylinder body and the gas chamber are fixed together;

[0023] It also includes an air supply mechanism that blows air into the fluidizing cylinder body to make the powder fluffy. The air supply mechanism includes a perforated plate and an air supply unit. The perforated plate is located inside the fluidizing cylinder and connected to the fluidizing cylinder. The perforated plate is located below the agitator. The air supply unit is connected to the air chamber.

[0024] Furthermore, it also includes a vibrator that uses vibration to keep the powder surface in the fluidizing cylinder in a flat state, and the vibrator is fixed to the fluidizing cylinder.

[0025] Furthermore, it also includes an automatic powder feeding mechanism, which includes a feeding hopper, a conveyor, and a powder flow channel. The conveyor is connected to the feeding hopper, one end of the powder flow channel is connected to the feeding hopper, and the other end of the powder flow channel is connected to the fluidizing cylinder.

[0026] Furthermore, it also includes a controller, a sensor for detecting the height of the powder, the controller being electrically connected to the sensor, and the controller being electrically connected to the conveyor and the rotary drive respectively.

[0027] When it is necessary to coat the stator winding surface with powder, a robotic arm inserts the stator winding into the powder in the fluidizing cylinder and starts the motor. The motor drives the drive gear to rotate, thereby rotating the intermediate rotating ring through the meshing of the gear. The torque of the intermediate rotating ring is transmitted sequentially to the connecting plate, support ring, stirring bar, and bridging component, thereby rotating the agitator. The agitator stirs the powder in the fluidizing cylinder, thereby relaxing the powder and making it easier to coat the surface of the stator winding. Therefore, this invention enables the powder to form a uniform coating on the winding. Attached Figure Description

[0028] Figure 1 This is a three-dimensional view of the coating system for the stator windings.

[0029] Figure 2 This is a three-dimensional view of the fluidizing cylinder.

[0030] Figure 3 This is a cross-sectional view of the fluidizing cylinder and the perforated plate.

[0031] Figure 4 This is an assembly drawing of the intermediate rotating ring and the bearing housing.

[0032] Figure 5 This is a cross-sectional view of the intermediate rotating ring and the bearing housing.

[0033] Figure 6 This is a 3D diagram of the central rotating ring.

[0034] Figure 7 This is a 3D view of the mixer.

[0035] Figure 8 This is a 3D view of a rotary drive.

[0036] Labels in the attached diagram:

[0037] Workbench 1, through hole 1a, fluidizing cylinder 2, fluidizing cylinder body 2a, air chamber 2b, intermediate rotating ring 3, gear 3a, first step 3b, first extension 3c, second extension 3d, bearing seat 4, first protrusion 4a, first step 4b, pressure cap 4c, mounting plate 4d, bearing 5, support 6, motor 7, drive gear 8, connecting piece 9, support ring 10, first connecting ring 10a, second connecting ring 10b, stirring bar 11, first screw 11a, second screw 11b, bridging component 12, perforated plate 13, air supply unit 14, vibrator 15, feeding hopper 16, conveyor 17, stepper motor 17a, screw 17b, powder flow channel 18, controller 19, sensor 20. Detailed Implementation

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on the drawings without creative effort, and these embodiments are still within the protection scope of the claims of this utility model.

[0039] like Figures 1 to 8 The stator winding coating system of this utility model includes a workbench 1, a fluidizing cylinder 2, an annular rotary mechanism, a rotary driver, and a stirrer. The following is a detailed description of each part and the relationship between them.

[0040] The worktable 1 has a through hole 1a; the worktable 1 consists of a frame and a table surface, and the through hole 1a is located on the table surface. The frame is made of galvanized steel, and the table surface is made of stainless steel.

[0041] The opening of the fluidizing cylinder 2 mates with the through hole 1a. The fluidizing cylinder 2 is located below the workbench 1. The fluidizing cylinder 2 includes a fluidizing cylinder body 2a and a gas chamber 2b. Both ends of the fluidizing cylinder body 2a have openings. One end of the fluidizing cylinder body 2a mates with the through hole 1a, and the other end is fixed to the gas chamber 2b. Mounting holes are provided on the circumferential surface of the gas chamber 2b. The gas chamber 2b is in a cylindrical state, with one end open and the other end closed. The open end of the gas chamber 2b is fixed to the fluidizing cylinder body 2a.

[0042] A ring-shaped rotary mechanism is mounted on the worktable 1 and mates with a through hole 1a. The ring-shaped rotary mechanism includes an intermediate rotating ring 3, a bearing seat 4, and a bearing 5. The intermediate rotating ring 3 mates with the worktable 1, and a gear 3a is provided on the circumference of the intermediate rotating ring 3. The bearing seat 4 is ring-shaped and surrounds the intermediate rotating ring 3. The bearing seat 4 is fixed to the worktable 1 and has a mounting plate 4d integrally formed with it. The mounting plate 4d is fixed to the worktable 1. The bearing seat 4 has a clearance opening through which the rotary drive passes and mates with the gear 3a. The bearing 5 is located between the intermediate rotating ring 3 and the bearing seat 4, and mates with both the intermediate rotating ring 3 and the bearing seat 4.

[0043] The intermediate rotating ring 3 and the gear 3a are integrally formed. The gear 3a protrudes from the circumference of the intermediate rotating ring 3, forming a first step 3b between the gear 3a and the intermediate rotating ring 3. A first protrusion 4a is provided on the inner wall of the bearing housing 4, forming a first step 4b between the first protrusion 4a and the bearing housing 4. The bearing 5 mates with the first step 3b and the first step 4b respectively. There are two bearings 5, one of which is supported by the first step 4b and the first step 3b, and the other bearing 5 is supported by the mounting plate 4d.

[0044] One end of the intermediate rotating ring 3 is provided with a first extension 3c, which is inserted into the through hole 1a. The wall of the through hole 1a forms a radial limit on the first extension 3c to prevent the intermediate rotating ring 3 from moving radially along the worktable 1. The lower end of the intermediate rotating ring 3 is clearance-fitted with the surface of the worktable 1. The other end of the intermediate rotating ring 3 is provided with a second extension 3d. A pressure cap 4c is provided on the bearing seat 4. After the pressure cap 4c is pressed against the upper end of the intermediate rotating ring 3, the pressure cap 4c and the second extension 3d are clearance-fitted. The intermediate rotating ring 3 is clamped between the pressure cap 4c and the worktable 1, thereby forming an axial limit on the intermediate rotating ring 3 to prevent axial movement of the intermediate rotating ring 3.

[0045] The rotary drive drives the annular rotary mechanism to rotate. The rotary drive cooperates with the annular rotary mechanism. The rotary drive includes a support 6, a motor 7, and a drive gear 8. The support 6 is fixed to the worktable 1. The motor 7 is preferably a geared motor. The motor 7 is mounted on the support 6. The drive gear 8 is connected to the torque output end of the motor 7. The drive gear 8 cooperates with the annular rotary mechanism. The drive gear 8 meshes with the gear 3a in the annular rotary mechanism. When the motor 7 is working, the torque output by the motor 7 causes the drive gear 8 to rotate. The power of the drive gear 8 is transmitted to the intermediate rotating ring 3 through the gear 3a, thereby causing the intermediate rotating ring 3 to rotate.

[0046] The agitator mixes the powder. The agitator is fixed to the annular rotating mechanism, and a part of the agitator is suspended inside the fluidizing cylinder 2. The agitator includes a connecting plate 9, a support ring 10, a stirring bar 11, and a bridging component 12. One end of the connecting plate 9 is fixed to the annular rotating mechanism, and the other end of the connecting plate 9 is fixed to the support ring 10. One end of the stirring bar 11 is connected to the support ring 10, and the other end of the stirring bar 11 is connected to the bridging component 12. The support ring 10 surrounds the bridging component 12, and the axial direction of the bridging component 12 is on the same straight line as the axial direction of the fluidizing cylinder 2.

[0047] The support ring 10 includes a first connecting ring 10a and a second connecting ring 10b. After the first connecting ring 10a and the second connecting ring 10b are fixed, an angle of 90° is formed between them. The connecting piece 9 is fixed to the first connecting ring 10a. One end of the stirring bar 11 is provided with a first mounting hole, and the other end of the stirring bar 11 is provided with a second mounting hole. A first screw 11a is used to pass through the first mounting hole on the stirring bar 11 and connect to the second connecting ring 10b. A second screw 11b is used to pass through the second mounting hole on the stirring bar 11 and connect to the bridging component 12. The bridging component 12 is a ring-shaped component.

[0048] When it is necessary to coat the powder onto the surface of the stator winding, the stator winding is inserted into the powder in the fluidizing cylinder 2 by a robotic arm, and the motor 7 is started. The motor 7 drives the drive gear 8 to rotate, thereby rotating the intermediate rotating ring 3 through the meshing of the gear. The torque of the intermediate rotating ring 3 is transmitted sequentially to the connecting plate 9, the support ring 10, the stirring bar 11, and the bridging component 12, thereby causing the agitator to rotate. The agitator stirs the powder in the fluidizing cylinder 2, thereby making the powder in a relaxed state, which makes it easier to coat the surface of the stator winding.

[0049] This invention also includes an air supply mechanism for blowing air into the fluidizing cylinder body 2a to keep the powder in a fluffy state. The air supply mechanism includes a perforated plate 13 and an air supply unit 14. The perforated plate 13 is located inside and connected to the fluidizing cylinder 2, and is located below the agitator. There are multiple perforated plates 13, and the powder inside the fluidizing cylinder body 2a is supported by one of the perforated plates 13. The air supply unit 14 is connected to the air chamber 2b. The air supply unit 14 includes an air pump, a filter, and an air delivery pipe. The output end of the air pump is connected to the input end of the filter, the output end of the filter is connected to one end of the air delivery pipe, and the other end of the air delivery pipe is connected to the air chamber 2b.

[0050] The gas output from the gas supply unit 14 passes through the perforated plate 13 and enters the fluidizing cylinder body 2a. The gas blows the powder, making the powder fluffy. When the stator winding comes into contact with the powder, the fluffy powder is more likely to adhere to the surface of the stator winding.

[0051] This invention also includes a vibrator 15 that uses vibration to keep the powder surface in the fluidizing cylinder 2 level, and the vibrator 15 is fixed to the fluidizing cylinder 2. This invention also includes a controller 19 and a sensor 20 for detecting the powder surface height. The controller 19 is electrically connected to the sensor 20, and the controller 19 is electrically connected to the conveyor 17 and the rotary drive. The controller 19 is preferably a PLC controller. This invention also includes an automatic powder feeding mechanism, which includes a hopper 16, a conveyor 17, and a powder flow channel 18. The conveyor 17 cooperates with the hopper 16, one end of the powder flow channel 18 cooperates with the hopper 16, and the other end of the powder flow channel 18 cooperates with the fluidizing cylinder 2. The conveyor 17 consists of a stepper motor 17a and a screw 17b feeding component. The stepper motor 17a is connected to the screw feeding component 17b. One end of the screw feeding component 17b is connected to the feeding hopper 16, and the other end of the screw feeding component 17b is connected to the powder flow channel 18.

[0052] When the system starts, vibrator 15 is activated, causing the fluidizing cylinder 2 to vibrate and level the powder surface inside. After a certain delay following startup, the powder surface is leveled evenly. Subsequently, sensor 20 monitors the powder level in real time and transmits the data to controller 19. Controller 19 controls the feeding speed of the automatic powder feeding mechanism based on the difference between the powder level and the set value. The powder level can be categorized into the following cases:

[0053] 1. The actual powder level is much lower than the powder level setting value in the PLC controller: In this case, the feeding speed is set to fast to quickly increase the actual powder level.

[0054] 2. The actual powder level is lower than but close to the powder level setting value in the PLC controller: In this case, the feeding speed is set to slow speed to avoid feeding too fast and causing the powder level to be higher than the set value.

[0055] 3. When the actual powder level is within the powder level setting value in the PLC controller: At this time, the automatic powder feeding mechanism stops working, that is, stops feeding, and waits for the powder level to change.

[0056] 4. If the actual powder level is higher than the powder level setting value in the PLC controller: At this time, the automatic powder feeding mechanism will also stop feeding and will not perform feeding operations.

[0057] The PLC controller collects analog data of the powder level and processes minor fluctuations caused by the fluidization state of the powder. Its judgment on whether the feeding height is acceptable is based on the requirement that the powder level remain within a preset range for several seconds to effectively eliminate fluctuation interference and ensure accurate judgment. For example, when the powder level is within the set value range, the automatic powder feeding mechanism stops feeding. If, within a few seconds after stopping feeding, the actual powder level is lower than the powder level setting value in the PLC controller, the PLC controller restarts the automatic powder feeding mechanism until the powder level is acceptable, at which point the PLC controller controls the automatic powder feeding mechanism to stop feeding again.

[0058] The automatic powder feeding mechanism in this invention achieves automated and intelligent powder feeding through precise PLC controller control, improving production efficiency and product quality. Simultaneously, by adjusting the feeding speed and feed rate, precise control of the powder height is achieved, avoiding excessive powder level due to excessive feeding speed. Furthermore, by setting the acceptable powder level height as a condition for continuous operation within a set range for several seconds, the system effectively adapts to fluctuations in the powder's fluidization state, improving the stability and accuracy of feeding control. The system continuously monitors the powder height and adjusts the feeding speed and feed rate in real time based on the monitoring results, ensuring that the powder height is always maintained within the reference range.

Claims

1. A system for coating stator windings, characterized in that The utility model relates to a fluidized bed granulator, which comprises: a workbench (1) provided with a through hole (1a); a fluidizing cylinder (2) having an opening matched with the through hole (1a); a ring-shaped rotating mechanism mounted on the workbench (1) and matched with the through hole (1a); a rotating driver for driving the ring-shaped rotating mechanism to rotate and matched with the ring-shaped rotating mechanism; a stirrer for stirring powder and fixed to the ring-shaped rotating mechanism, and a part of the stirrer is suspended in the fluidizing cylinder (2).

2. The system for coating stator windings according to claim 1, characterized in that, The ring-shaped rotating mechanism comprises: an intermediate rotating ring (3) matched with the workbench (1) and provided with a gear (3a) on the peripheral surface thereof; a bearing seat (4) surrounding the intermediate rotating ring (3), fixed to the workbench (1) and provided with a clearance for the rotating driver to pass through and matched with the gear (3a); a bearing (5) located between the intermediate rotating ring (3) and the bearing seat (4) and matched with the intermediate rotating ring (3) and the bearing seat (4).

3. A system for coating stator windings as claimed in claim 2, characterised in that, The gear (3a) protrudes from the peripheral surface of the intermediate rotating ring (3), a first step (3b) is formed between the gear (3a) and the intermediate rotating ring (3), a first protrusion (4a) is arranged on the inner wall of the bearing seat (4), a first step (4b) is formed between the first protrusion (4a) and the bearing seat (4), and the bearing (5) is matched with the first step (3b) and the first step (4b) respectively.

4. The system for coating stator windings of claim 2, wherein, One end of the intermediate rotating ring (3) is provided with a first extension (3c) inserted into the through hole (1a), and the lower end of the intermediate rotating ring (3) is matched with the surface of the workbench (1) in a clearance; the other end of the intermediate rotating ring (3) is provided with a second extension (3d), the bearing seat (4) is provided with a gland (4c), the gland (4c) is pressed against the upper end of the intermediate rotating ring (3), and the gland (4c) is matched with the second extension (3d) in a clearance.

5. The system for coating stator windings of claim 1, wherein, The rotating driver comprises a support (6), a motor (7) and a driving gear (8), the support (6) is fixed to the workbench (1), the motor (7) is mounted on the support (6), the driving gear (8) is connected with the torque output end of the motor (7), and the driving gear (8) is matched with the ring-shaped rotating mechanism.

6. The system for coating stator windings of claim 1, wherein, The stirrer comprises a connecting sheet (9), a supporting ring (10), a stirring bar (11) and a bridging component (12), one end of the connecting sheet (9) is fixed to the ring-shaped rotating mechanism, the other end of the connecting sheet (9) is fixed to the supporting ring (10), one end of the stirring bar (11) is connected with the supporting ring (10), the other end of the stirring bar (11) is connected with the bridging component (12), the supporting ring (10) surrounds the bridging component (12), and the axial direction of the bridging component (12) is in the same straight line with the axial direction of the fluidizing cylinder (2).

7. A system for coating stator windings according to any one of claims 1 to 6, characterised in that, The fluidizing cylinder (2) comprises a fluidizing cylinder body (2a) and a gas chamber (2b), both ends of the fluidizing cylinder body (2a) are provided with openings, and the fluidizing cylinder body (2a) is fixed to the gas chamber (2b). The air supply mechanism for blowing air to the fluidizing cylinder body (2a) to make the powder material in a fluffy state, the air supply mechanism comprising a porous plate (13) and an air supply unit (14), the porous plate (13) being located in the fluidizing cylinder (2) and connected with the fluidizing cylinder (2), the porous plate (13) being located below the stirrer, the air supply unit (14) being connected with the air chamber (2b).

8. A system for coating stator windings according to any one of claims 1 to 6, characterised in that, The vibrator (15) for making the powder surface in the fluidizing cylinder (2) in a flat state by vibration, the vibrator (15) being fixed with the fluidizing cylinder (2).

9. A system for coating stator windings according to any one of claims 1 to 6, characterised in that, The automatic powder feeding mechanism, the automatic powder feeding mechanism comprising a feeding hopper (16), a conveyor (17) and a powder flow channel (18), the conveyor (17) being matched with the feeding hopper (16), one end of the powder flow channel (18) being matched with the feeding hopper (16), and the other end of the powder flow channel (18) being matched with the fluidizing cylinder (2).

10. The system for coating stator windings of claim 9, wherein, The controller (19) and the sensor (20) for detecting the powder surface height, the controller (19) being electrically connected with the sensor (20), and the controller (19) being electrically connected with the conveyor (17) and the rotary driver respectively.

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