Coating system for stator winding

Abstract

The invention discloses a coating system of a stator winding, comprising: a workbench 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 invention, the powder coated on the stator winding is in an active state, so that the winding can be uniformly coated by the powder.

Description

Technical Field

[0001] The invention relates to the field of motor stator manufacturing, and in particular to a coating system for stator windings. Background Art

[0002] The coating process in the motor stator is to achieve fine coating on the product surface through high-precision motion control and angle control on the equipment. Its main function is to coat an insulating layer on the surface of the motor coil, thereby increasing the thickness and strength of the insulating material and improving the insulation and safety performance of the motor. Coating can improve the insulation performance, effectively prevent partial discharge, thereby improving the reliability of the motor, and can also significantly enhance the mechanical properties of the winding and reduce wear and aging.

[0003] The following problems exist in the current coating process: First, the powder is in a static state in the container, and the powder cannot be evenly coated on the stator winding.

[0004] Second, traditional powder feeding methods often have problems such as slow response speed, low accuracy, and inability to adapt to fluidization state fluctuations. Summary of the invention

[0005] The invention provides a coating system for a stator winding. The invention enables the powder coated on the stator winding to be in an active state, so that the powder can form a uniform coating on the winding.

[0006] Coating system for stator windings, including: A workbench, wherein a through hole is provided on the workbench; A fluidizing cylinder, wherein an opening of the fluidizing cylinder cooperates with the through hole; An annular rotary mechanism, the annular rotary mechanism is mounted on a workbench, and the annular rotary mechanism is matched with the through hole; A slewing driver driving the annular slewing mechanism to rotate, the slewing driver cooperating with the annular slewing mechanism; The agitator is used to stir the powder, the agitator is fixed to the annular rotary mechanism, and a part of the agitator is suspended in the fluidizing tube.

[0007] Furthermore, the annular rotating mechanism comprises: An intermediate rotating ring matched with the workbench, with gears arranged on the circumference of the intermediate rotating ring; The bearing seat surrounds the middle rotating ring, the bearing seat is fixed to the workbench, and a clearance opening is provided on the bearing seat, through which the rotary drive passes to cooperate with the gear; The bearing is located between the intermediate swivel and the bearing seat, and the bearing cooperates with the intermediate swivel and the bearing seat.

[0008] 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 seat, a first step is formed between the first protrusion and the bearing seat, and the bearing cooperates with the first step and the first step respectively.

[0009] Furthermore, a first extension portion is provided at one end of the intermediate rotating ring, the first extension portion is inserted into the through hole, and the lower end of the intermediate rotating ring is in clearance fit with the surface of the workbench; A second extension portion is provided at the other end of the intermediate rotating ring, and a pressure cover is provided on the bearing seat. After the pressure cover is pressed on the upper end of the intermediate rotating ring, the pressure cover and the second extension portion are clearance-matched.

[0010] Furthermore, the rotary driver includes a support, a motor, and a gear. The support is fixed to the workbench, the motor is installed on the support, the gear is connected to the torque output end of the motor, and the gear cooperates with the annular rotary mechanism.

[0011] 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.

[0012] Furthermore, the fluidizing tube includes a fluidizing tube body and an air chamber, both ends of the fluidizing tube body have openings, and the fluidizing tube body is fixed to the air chamber; It also includes an air supply mechanism for blowing air into the fluidizing cylinder body to make the powder fluffy. The air supply mechanism includes a porous plate and an air supply unit. The porous plate is located in the fluidizing cylinder and connected to the fluidizing cylinder. The porous plate is located below the agitator, and the air supply unit is connected to the air chamber.

[0013] Furthermore, it also includes a vibrator which makes the powder surface of the powder in the fluidizing cylinder in a flat state through vibration, and the vibrator is fixed to the fluidizing cylinder.

[0014] Furthermore, it also includes an automatic powder feeding mechanism, which includes a feeding hopper, a conveyor, and a powder flow channel. The conveyor cooperates with the feeding hopper, one end of the powder flow channel cooperates with the feeding hopper, and the other end of the powder flow channel cooperates with the fluidizing cylinder.

[0015] Furthermore, it also includes a controller and a sensor for detecting the height of the powder surface. The controller is electrically connected to the sensor, and the controller is electrically connected to the conveyor and the rotary drive respectively.

[0016] When the powder needs to be coated on the surface of the stator winding, the stator winding is inserted into the powder in the fluidizing drum by a manipulator, and the motor is started. The motor drives the driving gear to rotate, thereby rotating the intermediate swivel through the meshing action of the gears. The torque of the intermediate swivel is transmitted to the connecting piece, the supporting ring, the stirring bar, and the bridging component in turn, thereby rotating the agitator. The agitator stirs the powder in the fluidizing drum, thereby putting the powder in a relaxed state, and making it easier to coat the surface of the stator winding. Therefore, the present invention enables the powder to form a uniform coating on the winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A perspective view of the stator winding coating system.

[0018] Figure 2 It is a three-dimensional diagram of the fluidizing tube.

[0019] Figure 3 It is a cross-sectional view of the fluidizing cylinder and the porous plate.

[0020] Figure 4 This is the assembly drawing of the intermediate swivel and the bearing seat.

[0021] Figure 5 It is a cross-sectional view of the intermediate swivel and the bearing seat.

[0022] Figure 6 This is a three-dimensional diagram of the middle swivel.

[0023] Figure 7 A three-dimensional diagram of a stirrer.

[0024] Figure 8 A perspective view of a rotary drive.

[0025] Markings in the accompanying drawings: Workbench 1, through hole 1a, fluidizing cylinder 2, fluidizing cylinder body 2a, air chamber 2b, intermediate swivel 3, gear 3a, first step 3b, first extension 3c, second extension 3d, bearing seat 4, first protrusion 4a, first step 4b, pressure cover 4c, mounting plate 4d, bearing 5, support 6, motor 7, driving 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, porous plate 13, air supply unit 14, vibrator 15, upper hopper 16, conveyor 17, stepping motor 17a, screw 17b, powder flow channel 18, controller 19, sensor 20. DETAILED DESCRIPTION

[0026] In order to more clearly illustrate the examples of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other implementation methods can be obtained according to the drawings in the specification without paying creative work, and these implementation methods are still within the protection scope of the claims of the present invention.

[0027] like Figures 1 to 8 The stator winding coating system of the present invention includes a workbench 1, a fluidizing drum 2, an annular rotary mechanism, a rotary drive, and an agitator. The various parts and the relationship between them are described in detail below.

[0028] The workbench 1 is provided with a through hole 1a; the workbench 1 is composed of a frame and a table top, and the through hole 1a is arranged on the table top. The frame is made of galvanized steel, and the table top is made of stainless steel.

[0029] The opening of the fluidizing cylinder 2 matches with the through hole 1a. The fluidizing cylinder 2 is located below the table of the workbench 1. The fluidizing cylinder 2 includes a fluidizing cylinder body 2a and an air chamber 2b. Both ends of the fluidizing cylinder body 2a have openings. One end of the fluidizing cylinder body 2a matches with the through hole 1a, and the other end of the fluidizing cylinder body 2a is fixed to the air chamber 2b. The circumference of the air chamber 2b is provided with mounting holes. The air chamber 2b is in a cylindrical state, one end of the air chamber 2b has an opening, and the other end of the air chamber 2b is in a closed state. The end of the air chamber 2b with an opening is fixed to the fluidizing cylinder body 2a.

[0030] The annular rotary mechanism is installed on the workbench 1, and the annular rotary mechanism cooperates with the through hole 1a. The annular rotary mechanism includes an intermediate rotary ring 3, a bearing seat 4, and a bearing 5. The intermediate rotary ring 3 cooperates with the workbench 1. A gear 3a is provided on the circumference of the intermediate rotary ring 3. The bearing seat 4 is annular, and the bearing seat 4 surrounds the intermediate rotary ring 3. The bearing seat 4 is fixed to the workbench 1. The bearing seat 4 has a mounting plate 4d, and the mounting plate 4d is integrally formed with the bearing seat 4. The mounting plate 4d is fixed to the workbench 1. A clearance port is provided on the bearing seat 4, and the rotary drive passes through the clearance port and cooperates with the gear 3a. The bearing 5 is located between the intermediate rotary ring 3 and the bearing seat 4, and the bearing 5 cooperates with the intermediate rotary ring 3 and the bearing seat 4.

[0031] The intermediate swivel 3 and the gear 3a are integrally formed, the gear 3a protrudes from the circumference of the intermediate swivel 3, a first step 3b is formed between the gear 3a and the intermediate swivel 3, a first protrusion 4a is provided 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. 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.

[0032] One end of the intermediate swivel 3 is provided with a first extension 3c, which is inserted into the through hole 1a. The hole wall of the through hole 1a forms a radial limit on the first extension 3c to prevent the intermediate swivel 3 from radially moving along the workbench 1. The lower end of the intermediate swivel 3 is in clearance with the surface of the workbench 1. The other end of the intermediate swivel 3 is provided with a second extension 3d. The bearing seat 4 is provided with a pressure cover 4c. After the pressure cover 4c is pressed on the upper end of the intermediate swivel 3, the pressure cover 4c and the second extension 3d are in clearance. The intermediate swivel 3 is clamped between the pressure cover 4c and the workbench 1, thereby forming an axial limit on the intermediate swivel 3 to prevent the intermediate swivel 3 from axially moving.

[0033] The slewing driver drives the annular slewing mechanism to rotate. The slewing driver cooperates with the annular slewing mechanism. The slewing driver includes a support 6, a motor 7, and a driving gear 8. The support 6 is fixed to the workbench 1. The motor 7 preferably adopts a reduction motor. The motor 7 is installed on the support 6. The driving gear 8 is connected to the torque output end of the motor 7. The driving gear 8 cooperates with the annular slewing mechanism. The driving gear 8 meshes with the gear 3a in the annular slewing mechanism. When the motor 7 is working, the torque output by the motor 7 causes the driving gear 8 to rotate. The power of the driving gear 8 is transmitted to the intermediate slewing ring 3 through the gear 3a, thereby rotating the intermediate slewing ring 3.

[0034] The agitator stirs the powder, the agitator is fixed to the annular rotating mechanism, and a part of the agitator is suspended in the fluidizing tube 2. The agitator includes a connecting piece 9, a supporting ring 10, a stirring bar 11, and a bridging member 12. One end of the connecting piece 9 is fixed to the annular rotating mechanism, the other end of the connecting piece 9 is fixed to the supporting ring 10, one end of the stirring bar 11 is connected to the supporting ring 10, and the other end of the stirring bar 11 is connected to the bridging member 12. The supporting ring 10 surrounds the bridging member 12, and the axial direction of the bridging member 12 is on the same straight line as the axial direction of the fluidizing tube 2.

[0035] 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 the first connecting ring 10a and the second connecting ring 10b. The connecting piece 9 is fixed to the first connecting ring 10a. A first mounting hole is provided at one end of the stirring bar 11, and a second mounting hole is provided at the other end of the stirring bar 11. A first screw 11a is passed through the first mounting hole on the stirring bar 11 to connect with the second connecting ring 10b, and a second screw 11b is passed through the second mounting hole on the stirring bar 11 to connect with the bridging component 12. The bridging component 12 is an annular component.

[0036] When the powder needs to be coated on the surface of the stator winding, the stator winding is inserted into the powder in the fluidizing drum 2 by a manipulator, and the motor 7 is started. The motor 7 drives the driving gear 8 to rotate, thereby rotating the intermediate swivel 3 through the meshing action of the gears. The torque of the intermediate swivel 3 is transmitted to the connecting piece 9, the supporting ring 10, the stirring bar 11, and the bridging component 12 in turn, thereby rotating the agitator. The agitator stirs the powder in the fluidizing drum 2, thereby making the powder in a relaxed state, thereby making it easier to coat the powder on the surface of the stator winding.

[0037] The present invention also includes an 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 includes a porous plate 13 and an air supply unit 14, the porous plate 13 is located in the fluidizing cylinder 2 and connected to the fluidizing cylinder 2, the porous plate 13 is located below the agitator, the porous plate 13 is a plurality of pieces, the powder material in the fluidizing cylinder body 2a is supported by one of the porous plates 13, and 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 supply pipeline, 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 supply pipeline, and the other end of the air supply pipeline is connected to the air chamber 2b.

[0038] The gas output by the air supply unit 14 passes through the porous plate 13 and enters the fluidizing drum body 2a. The gas blows the powder, making the powder fluffy. When the stator winding contacts the powder, the fluffy powder is more likely to adhere to the surface of the stator winding.

[0039] The present invention also includes a vibrator 15 for making the powder surface of the powder in the fluidizing cylinder 2 flat by vibration, and the vibrator 15 is fixed to the fluidizing cylinder 2. The present invention also includes a controller 19 and a sensor 20 for detecting the height of the powder surface, the controller 19 is electrically connected to the sensor 20, the controller 19 is electrically connected to the conveyor 17 and the rotary drive, and the controller 19 preferably adopts a PLC controller. The present invention also includes an automatic powder feeding mechanism, which includes a feeding hopper 16, a conveyor 17, and a powder flow channel 18, the conveyor 17 cooperates with the feeding hopper 16, one end of the powder flow channel 18 cooperates with the feeding hopper 16, and the other end of the powder flow channel 18 cooperates with the fluidizing cylinder 2. The conveyor 17 is composed of a stepper motor 17a and a screw feeding component 17b. The stepper motor 17a is connected to the screw feeding component 17b. One end of the screw feeding component 17b is engaged with the upper hopper 16, and the other end of the screw feeding component 17b is matched with the powder flow channel 18.

[0040] When the system starts, the vibrator 15 is turned on, and the vibrator 15 drives the fluidizing drum 2 to vibrate, so that the powder surface in the fluidizing drum 2 is in a flat state. After starting, a certain time is delayed to make the powder surface in a more flat state. Subsequently, the sensor 20 monitors the powder surface height in real time and transmits the data to the controller 19. The controller 19 controls the speed of the automatic powder feeding mechanism to feed the powder according to the difference between the powder surface height and the set value. The powder surface height is divided into the following situations: 1. The actual powder height is much lower than the powder height setting value in the PLC controller: At this time, the feeding speed is set to fast to quickly increase the actual powder height.

[0041] 2. The actual powder height is lower than the powder height setting value in the PLC controller but close to it: At this time, the feeding speed is set to slow to avoid feeding too fast and causing the powder height to be higher than the set value.

[0042] 3. The actual powder height is within the powder height 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 height to change.

[0043] 4. The actual powder height is higher than the powder height setting value in the PLC controller: At this time, the automatic powder feeding mechanism also stops feeding and does not perform feeding operations.

[0044] The PLC controller collects analog data of the powder surface height and processes the small fluctuations caused by the fluidization state of the powder. The basis for judging whether the feeding height is qualified is that the powder surface height needs to remain within the preset range for several seconds to effectively eliminate fluctuation interference and ensure the accuracy of the judgment. For example: when the powder surface height is within the set value range, the automatic powder feeding mechanism stops feeding. If within a few seconds after stopping feeding, the actual powder surface height is lower than the powder surface height setting value in the PLC controller, the PLC controller will start the automatic powder feeding mechanism again to feed until the powder surface height is qualified, and the PLC controller controls the automatic powder feeding mechanism to stop feeding again.

[0045] The automatic powder feeding mechanism of the present invention realizes the automation and intelligence of powder through the precise control of the PLC controller, thereby improving production efficiency and product quality. At the same time, by adjusting the feeding speed and feeding amount, the precise control of the powder height is achieved, avoiding the problem of excessive powder height caused by too fast feeding. In addition, by setting the qualified condition of the powder height to the powder height being within the set value range for several seconds, it effectively adapts to the fluctuation of the fluidization state of the powder and improves the stability and accuracy of the feeding control. The system monitors the powder height in a cycle, and adjusts the feeding speed and feeding amount in real time according to the monitoring results to ensure that the powder height is always maintained within the reference value range.

Claims

1. A coating system for stator windings, characterized in that: include: A workbench (1), wherein the workbench (1) is provided with a through hole (1a); A fluidizing cylinder (2), wherein an opening of the fluidizing cylinder (2) matches with the through hole (1a); An annular rotating mechanism, the annular rotating mechanism is mounted on the workbench (1), and the annular rotating mechanism cooperates with the through hole (1a); A slewing driver driving the annular slewing mechanism to rotate, the slewing driver cooperating with the annular slewing mechanism; A stirrer is used to stir the powder, the stirrer is fixed to the annular rotary mechanism, and a part of the stirrer is suspended in the fluidizing barrel (2).

2. The stator winding coating system according to claim 1, characterized in that: The annular rotary mechanism comprises: An intermediate rotating ring (3) matched with the workbench (1), wherein a gear (3a) is provided on a circumferential surface of the intermediate rotating ring (3); A bearing seat (4), the bearing seat (4) surrounds the middle rotating ring (3), the bearing seat (4) is fixed to the workbench (1), and a clearance opening is provided on the bearing seat (4), and the rotary drive passes through the clearance opening and cooperates with the gear (3a); The bearing (5) is located between the intermediate rotating ring (3) and the bearing seat (4), and the bearing (5) cooperates with the intermediate rotating ring (3) and the bearing seat (4).

3. The stator winding coating system according to claim 2, characterized in that: The gear (3a) protrudes from the circumferential surface of the intermediate rotating ring (3), and a first step (3b) is formed between the gear (3a) and the intermediate rotating ring (3). A first protrusion (4a) is provided on the inner wall of the bearing seat (4), and a first step (4b) is formed between the first protrusion (4a) and the bearing seat (4). The bearing (5) cooperates with the first step (3b) and the first step (4b), respectively.

4. The stator winding coating system according to claim 2, characterized in that: A first extension portion (3c) is provided at one end of the intermediate swivel (3), the first extension portion (3c) is inserted into the through hole (1a), and the lower end of the intermediate swivel (3) is clearance-matched with the surface of the workbench (1); The other end of the intermediate rotating ring (3) is provided with a second extension portion (3d), and the bearing seat (4) is provided with a pressure cover (4c). After the pressure cover (4c) is pressed onto the upper end of the intermediate rotating ring (3), the pressure cover (4c) and the second extension portion (3d) are clearance-matched.

5. The stator winding coating system according to claim 1, characterized in that: The rotary drive 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 to the torque output end of the motor (7); and the driving gear (8) cooperates with the annular rotary mechanism.

6. The stator winding coating system according to claim 1, characterized in that: The agitator comprises a connecting piece (9), a supporting ring (10), a stirring bar (11), and a bridging component (12); one end of the connecting piece (9) is fixed to the annular rotating mechanism, the other end of the connecting piece (9) is fixed to the supporting ring (10), one end of the stirring bar (11) is connected to the supporting ring (10), the other end of the stirring bar (11) is connected to the bridging component (12), the supporting ring (10) surrounds the bridging component (12), and the axial direction of the bridging component (12) is located on the same straight line as the axial direction of the fluidizing barrel (2).

7. The stator winding coating system according to any one of claims 1 to 6, characterized in that: The fluidizing cylinder (2) comprises a fluidizing cylinder body (2a) and an air chamber (2b); both ends of the fluidizing cylinder body (2a) have openings, and the fluidizing cylinder body (2a) and the air chamber (2b) are fixed; It also includes an air supply mechanism for blowing air toward the fluidizing barrel body (2a) to make the powder material fluffy, the air supply mechanism including a porous plate (13) and an air supply unit (14), the porous plate (13) being located inside the fluidizing barrel (2) and connected to the fluidizing barrel (2), the porous plate (13) being located below the agitator, and the air supply unit (14) being connected to the air chamber (2b).

8. The stator winding coating system according to any one of claims 1 to 6, characterized in that: It also includes a vibrator (15) for making the powder surface of the powder in the fluidizing cylinder (2) flat by vibrating, and the vibrator (15) is fixed to the fluidizing cylinder (2).

9. The stator winding coating system according to any one of claims 1 to 6, characterized in that: The invention also comprises an automatic powder feeding mechanism, which comprises a feeding hopper (16), a conveyor (17), and a powder flow channel (18). The conveyor (17) cooperates with the feeding hopper (16), one end of the powder flow channel (18) cooperates with the feeding hopper (16), and the other end of the powder flow channel (18) cooperates with the fluidizing cylinder (2).

10. The stator winding coating system according to claim 9, characterized in that: It also includes a controller (19) and a sensor (20) for detecting the height of the powder surface. The controller (19) is electrically connected to the sensor (20). The controller (19) is electrically connected to the conveyor (17) and the rotary drive, respectively.

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