Maintenance and detection device for motor winding

Abstract

The invention relates to the technical field of motor detection, in particular to a motor winding maintenance and detection device which comprises a base and a stator, a wire set is arranged in the stator, a support is fixedly connected to the outer side wall of the base, and a detection marking mechanism is arranged on the support. The detection marking mechanism comprises a liquid storage box fixedly connected to the support, a liquid adding opening is formed in the liquid storage box, a vertical rod is arranged on the liquid storage box in a communicating mode, and the vertical rod is hollow. A magnetic field is utilized to drive a steel wheel to rotate, hidden electromagnetic faults such as winding turn number abnormity, inserted line offset and wiring looseness are detected, the limitation of staged independent detection in the prior art is broken, integrated intelligent detection of surface defects and electromagnetic performance is achieved, and the comprehensiveness and reliability of stator winding detection are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of motor testing technology, specifically to a repair and testing device for motor windings. Background Technology

[0002] The motor stator is the core component of the motor. The surface integrity, winding accuracy, and wiring reliability of its internal windings directly affect the motor's operational stability and service life. Therefore, the detection of various defects in the windings is an essential procedure in the stator production and maintenance process.

[0003] In existing technologies, the detection of defects in motor stator windings typically relies on single-function testing equipment. Some equipment can only detect visible defects such as breakage and scratches on the winding surface through visual recognition, and cannot identify hidden faults that cause magnetic field fluctuations, such as abnormal number of winding turns, winding misalignment, and loose wiring. Other equipment can only indirectly determine whether there are electromagnetic faults in the winding through magnetic field parameter detection, but cannot accurately locate the fault area. Due to the lack of integrated testing devices, the actual testing process requires the use of multiple devices to complete the testing work in stages and steps. Testing personnel need to repeatedly clamp and transport the stator, which not only increases the operation process, but also results in long testing cycles and low efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a maintenance and testing device for motor windings, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a maintenance and testing device for motor windings, comprising a base and a stator, wherein a winding assembly is disposed inside the stator, a bracket is fixedly connected to the outer wall of the base, and a testing marking mechanism is disposed on the bracket, the testing marking mechanism comprising a liquid storage tank fixedly connected to the bracket, a liquid filling port being provided on the liquid storage tank, a vertical rod being connected to the liquid storage tank, the vertical rod being hollow, a collar being rotatably sleeved on the outer wall of the vertical rod, rotating rods being fixedly connected to both sides of the collar, a steel wheel being disposed at the end of the rotating rod, a liquid guide tube being provided through both sides of the rotating rod, an outer cylinder being fixedly connected to the end of the liquid guide tube, a through hole being provided inside the outer cylinder, the through hole extending into the interior of the liquid guide tube, a baffle being slidably connected inside the outer cylinder, a connecting rod being fixedly connected to the outer wall of the baffle, the side of the connecting rod away from the baffle slidingly extending into the exterior of the outer cylinder, and a dripping hole being provided inside the outer cylinder.

[0006] Preferably, a bottom box is fixedly connected to the outer wall of the outer cylinder, a slide rail is provided inside the bottom box, a slide plate is slidably connected inside the slide rail, the end of the connecting rod away from the baffle is fixedly connected to the outer wall of the slide plate, an electric push rod is fixedly connected to the outer wall of the bottom box, and the end of the electric push rod contacts the outer wall of the slide plate.

[0007] Preferably, a tension spring is fixedly connected to the outer side wall of the slide plate, and the end of the tension spring away from the slide plate is fixedly connected to the inner side wall of the base box. An external push rod is fixedly connected to the outer side wall of the slide plate.

[0008] Preferably, a liquid flow channel is provided on the liquid guide tube, and a sliding plate is slidably connected through the liquid flow channel. The sliding plate has a spray hole, and the end of the sliding plate is fixedly connected to an external push rod.

[0009] Preferably, a rotating box is rotatably connected to the outer wall of the vertical rod, and multiple liquid outlet holes are opened on the vertical rod. All of the multiple liquid outlet holes are located inside the rotating box, and the ends of the two liquid guide tubes away from the bottom box are connected to the interior of the rotating box.

[0010] Preferably, a marking disk is fixedly connected to the outer wall of the vertical rod, the marking disk having an outer area and an inner area respectively, and a visual detector is fixedly connected to the outer wall of the marking disk.

[0011] Preferably, hydraulic rods are fixedly connected to both sides of the base, and clamping mechanisms are provided on the hydraulic rods.

[0012] Preferably, the clamping mechanism includes a mounting base fixedly connected to the end of the hydraulic rod, an electric rod fixedly connected to the outer wall of the mounting base, and a clamping claw fixedly connected to the end of the electric rod away from the mounting base, the two clamping claws clamping the stator.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. This invention first uses a visual detector to intelligently detect obvious defects such as surface damage of the stator winding, and then uses a magnetic field to drive the steel wheel to rotate to detect hidden electromagnetic faults such as abnormal number of winding turns, winding offset, and loose wiring. This invention breaks through the limitations of existing technologies that require separate detection in stages, and realizes integrated intelligent detection of surface defects and electromagnetic performance, which greatly improves the comprehensiveness and reliability of stator winding detection.

[0015] 2. This invention employs a mechanical linkage structure that uses centrifugal force to drive the sliding plate. When the steel wheel rotates faster due to increased local magnetic field strength, the centrifugal force causes the sliding plate to move to the left, triggering the outer zone color mark, which accurately corresponds to faults such as excessive number of turns or wire misalignment. When the steel wheel rotates slower due to decreased local magnetic field strength, the tension spring causes the sliding plate to move to the right, triggering the inner zone color mark, which accurately corresponds to faults such as insufficient number of turns or loose wiring. The entire detection process is completely synchronized with the fault occurrence process, resulting in high fault location accuracy. At the same time, the partitioned marking design of the outer and inner zones can directly distinguish the fault type, providing clear guidance for subsequent maintenance and significantly reducing maintenance difficulty and time costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is a partial structural diagram of the present invention. Figure 1 ;

[0018] Figure 3 This is a side view diagram of the present invention. Figure 1 ;

[0019] Figure 4 This is a partial structural diagram of the present invention. Figure 2 ;

[0020] Figure 5 This is a side view diagram of the present invention. Figure 2 ;

[0021] Figure 6 for Figure 5 Enlarged view of A in the middle;

[0022] Figure 7 This is a schematic diagram of the overall structure of the present invention.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Base; 2. Hydraulic rod; 3. Mounting seat; 4. Electric rod; 5. Clamping claw; 6. Bracket; 7. Liquid storage tank; 8. Stator; 9. Wiring assembly; 10. Vertical rod; 11. Outer area; 12. Inner area; 13. Vision detector; 14. Steel wheel; 15. Rotating rod; 16. Rotating box; 17. Liquid outlet; 18. Liquid guide pipe; 19. Liquid filling port; 20. Outer cylinder; 21. Through hole; 22. Baffle; 23. Connecting rod; 24. Drip hole; 25. Base box; 26. Slide rail; 27. Slide plate; 28. Electric push rod; 29. ​​Tension spring; 30. External push rod; 31. Liquid flow channel; 32. Moving plate; 33. Spray hole; 34. Collar; 35. Marking plate. Detailed Implementation

[0025] 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.

[0026] Example 1: Please refer to Figure 1 - Figure 7 A maintenance and testing device for motor windings includes a base 1 and a stator 8. A winding assembly 9 is disposed inside the stator 8. A bracket 6 is fixedly connected to the outer wall of the base 1. A testing marking mechanism is disposed on the bracket 6. The testing marking mechanism includes a liquid storage tank 7 fixedly connected to the bracket 6. The liquid storage tank 7 has a liquid filling port 19. A vertical rod 10 is connected to the liquid storage tank 7. The vertical rod 10 is hollow. A collar 34 is rotatably sleeved on the outer wall of the vertical rod 10. Rotating rods are fixedly connected to both sides of the collar 34. 15. A steel wheel 14 is provided at the end of the rotating rod 15. Liquid guide tubes 18 are provided through both sides of the rotating rod 15. An outer cylinder 20 is fixedly connected to the end of the liquid guide tube 18. A through hole 21 is opened inside the outer cylinder 20, which extends into the interior of the liquid guide tube 18. A baffle 22 is slidably connected inside the outer cylinder 20. A connecting rod 23 is fixedly connected to the outer wall of the baffle 22. The side of the connecting rod 23 away from the baffle 22 slides through to the outside of the outer cylinder 20. A drip hole 24 is opened inside the outer cylinder 20.

[0027] A bottom box 25 is fixedly connected to the outer wall of the outer cylinder 20. A slide rail 26 is provided inside the bottom box 25. A slide plate 27 is slidably connected inside the slide rail 26. The end of the connecting rod 23 away from the baffle 22 is fixedly connected to the outer wall of the slide plate 27. An electric push rod 28 is fixedly connected to the outer wall of the bottom box 25. The end of the electric push rod 28 contacts the outer wall of the slide plate 27.

[0028] A tension spring 29 is fixedly connected to the outer side wall of the slide plate 27. The end of the tension spring 29 away from the slide plate 27 is fixedly connected to the inner side wall of the base box 25. An external push rod 30 is fixedly connected to the outer side wall of the slide plate 27.

[0029] A liquid flow channel 31 is connected to the liquid guide tube 18, and a sliding plate 32 is slidably connected through the liquid flow channel 31. A spray hole 33 is opened on the sliding plate 32, and the end of the sliding plate 32 is fixedly connected to the outer push rod 30.

[0030] A rotating box 16 is rotatably connected to the outer wall of the vertical rod 10. Multiple liquid outlet holes 17 are provided on the vertical rod 10. All liquid outlet holes 17 are located inside the rotating box 16. The ends of the two liquid guide tubes 18 away from the bottom box 25 are connected to the inside of the rotating box 16.

[0031] A marking disk 35 is fixedly connected to the outer wall of the vertical rod 10. The marking disk 35 is provided with an outer area 11 and an inner area 12 respectively. A visual detector 13 is fixedly connected to the outer wall of the marking disk 35.

[0032] In this embodiment, the operator can place the stator 8 between the two sets of clamping claws 5. After the stator 8 is in place, the operator controls the two sets of electric rods 4 to extend, driving the two sets of clamping claws 5 to stably clamp the stator 8 from both sides. After the clamping position of the stator 8 is fixed, the operator controls the hydraulic rod 2 to extend, pushing the clamped and fixed stator 8 upward until the vision detector 13 is fully inserted into the inner cavity of the stator 8. At this time, the vision detector 13 starts the visual intelligent detection process to detect whether there are any defects on the surface of the wire group 9 in the inner cavity of the stator 8. If damage is detected on the surface of the wire group 9, the vision detector 13 will immediately issue an alarm signal to remind the operator to repair the damaged part (this is prior art and will not be described in detail here).

[0033] If the visual detector 13 determines that the surface of the winding group 9 inside the stator 8 is intact and without any defects, it continues to control the extension of the hydraulic rod 2 to push the stator 8 further upward until the steel wheel 14 and the rotating rod 15 both extend into the inner cavity of the stator 8. At this time, three-phase alternating current is supplied to the stator 8. After the three-phase alternating current is supplied to the winding of the stator 8, a rotating magnetic field is formed. After the steel wheel 14 is magnetized, it is pulled by the electromagnetic force of the rotating magnetic field and then follows the rotating magnetic field to rotate along the inner cavity of the stator 8 (this is the prior art and will not be described in detail here).

[0034] As the steel wheel 14 drives the collar 34 to rotate along the inner cavity of the stator 8 via the rotating rod 15, the electric push rod 28 is controlled to retract, releasing the limiting obstruction on the slide plate 27. If the winding state of the inner wire group 9 of the stator 8 is normal at this time, the steel wheel 14 will drive the collar 34 to rotate at a constant speed along the inner cavity of the stator 8 via the rotating rod 15. Under the state of constant speed rotation, the centrifugal force generated by the rotation of the rotating rod 15 will allow the slide plate 27 to overcome the tension of the tension spring 29 and remain in the middle position of the bottom box 25.

[0035] During the rotation of the collar 34 driven by the steel wheel 14 through the rotating rod 15, if the rotation speed suddenly increases when it reaches a certain area inside the stator 8, the increased centrifugal force will cause the slide plate 27 to overcome the tension of the tension spring 29 and move to the left side of the bottom box 25. When the slide plate 27 moves to the left, it will push the connecting rod 23 to move synchronously, thereby pulling the baffle 22 to move to the left side of the outer cylinder 20 until the baffle 22 moves to the left side of the drip hole 24, releasing the blockage of the drip hole 24. At this time, the dye in the liquid guide tube 18 enters the outer cylinder 20 through the through hole 21 and drips through the drip hole 24 onto the surface of the corresponding area of ​​the outer area 11. Because the marking disk 35 is in a fixed state, and the disc-shaped space between its outer area 11 and inner area 12 is connected to the inner side of the stator 8, The cavity spaces are set up accordingly. After the testing process is completed, the operator can determine the corresponding fault area in the stator 8 by observing the position of the dye mark on the surface of the outer area 11. When this phenomenon occurs, the fault is usually caused by the number of turns of the winding group 9 in the corresponding area exceeding the design value. Since the magnetic field strength is positively correlated with the number of turns of the winding, the excessive number of turns will lead to the local magnetic field strength being too strong, which will increase the traction force on the steel wheel 14, causing the instantaneous speed of the steel wheel 14 and the rotating rod 15 to rise sharply. Alternatively, the winding of the winding group 9 in the corresponding area may be misaligned, and the winding may not be embedded in the center position of the stator 8, resulting in local focusing of magnetic lines of force, which will increase the traction force on the steel wheel 14. The operator can then carry out targeted repairs on the winding group 9 in the corresponding area of ​​the stator 8 based on this information.

[0036] Example 2: Please refer to Figure 1 - Figure 7 This embodiment further illustrates Example 1. Hydraulic rods 2 are fixedly connected to both sides of the base 1, and clamping mechanisms are provided on the hydraulic rods 2.

[0037] The clamping mechanism includes a mounting base 3 fixedly connected to the end of the hydraulic rod 2. An electric rod 4 is fixedly connected to the outer wall of the mounting base 3. A clamping claw 5 is fixedly connected to the end of the electric rod 4 away from the mounting base 3. The two clamping claws 5 clamp the stator 8.

[0038] In this embodiment, if the steel wheel 14 drives the collar 34 to rotate to a certain area inside the stator 8 via the rotating rod 15 and the rotation speed suddenly slows down, the centrifugal force generated by the lower rotation speed is insufficient to overcome the tension of the tension spring 29. The slide plate 27 will move a certain distance to the right side of the bottom box 25 under the tension of the tension spring 29. When the slide plate 27 moves to the right, it will push the moving plate 32 to move synchronously, allowing the spray hole 33 to enter the liquid flow channel 31. At this time, the dye flowing in the liquid guide tube 18 will drip onto the surface of the corresponding area of ​​the inner area 12 through the liquid flow channel 31 and the spray hole 33 in sequence. After the inspection process is completed, the operator can determine the corresponding fault area in the stator 8 by observing the position of the dye mark on the surface of the inner area 12. When this phenomenon occurs, the fault is usually caused by insufficient number of turns of the winding of the wire group 9 in the corresponding area, which leads to a decrease in local magnetic field strength and thus weakens the traction force on the steel wheel 14. The fault may also be caused by loose or poorly connected wiring of the winding of the wire group 9 in the corresponding area, which causes unstable current transmission, resulting in fluctuations in magnetic field strength and an overall low magnetic field strength. The operator can then carry out targeted repairs on the wire group 9 in the corresponding area of ​​the stator 8 based on this information.

[0039] It should be noted that during the entire process of the steel wheel 14 driving the collar 34 to rotate along the inner cavity of the stator 8 via the rotating rod 15, the electric push rod 28 remains in a retracted state. After the steel wheel 14 drives the collar 34 to rotate two full revolutions around the inner cavity of the stator 8 via the rotating rod 15, the electric push rod 28 will extend again to limit and fix the position of the slide plate 27. This is to prevent the slide plate 27 from moving to the rightmost position of the bottom box 25 due to the disappearance of centrifugal force after the detection work is completed, the steel wheel 14 is removed from the inner cavity of the stator 8 and stops rotating. At the same time, since the vertical rod 10 has a hollow structure design, the dye stored in the liquid storage tank 7 will be transported through the hollow channel of the vertical rod 10 and enter the rotating box 16 through multiple liquid outlet holes 17. The dye entering the rotating box 16 will be continuously transported to the liquid guide tube 18, thereby ensuring that the dye in the liquid guide tube 18 is always in a full liquid state and ensuring the stability of dye supply during the detection process.

[0040] It should also be noted that the dyes used in this technical solution are all water-soluble dyes. The dye can be quickly wiped off after it drips onto the surface of the outer area 11 and the inner area 12. Before testing different stators 8, the residual dye on the surface of the outer area 11 and the inner area 12 must be completely wiped off to avoid the residual dye interfering with the subsequent test results.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A maintenance and testing device for motor windings, comprising a base (1) and a stator (8), characterized in that, The stator (8) is equipped with a wire group (9) inside. A bracket (6) is fixedly connected to the outer wall of the base (1). A detection marking mechanism is provided on the bracket (6). The detection marking mechanism includes a liquid storage tank (7) fixedly connected to the bracket (6). A liquid filling port (19) is provided on the liquid storage tank (7). A vertical rod (10) is connected to the liquid storage tank (7). The vertical rod (10) is hollow. A collar (34) is rotatably sleeved on the outer wall of the vertical rod (10). Rotating rods (15) are fixedly connected to both sides of the collar (34). The end of the rotating rod (15) is provided with There is a steel wheel (14), and liquid guide tubes (18) are provided through the rotating rods (15) on both sides. An outer cylinder (20) is fixedly connected to the end of the liquid guide tube (18). A through hole (21) is opened inside the outer cylinder (20). The through hole (21) extends into the inside of the liquid guide tube (18). A baffle (22) is slidably connected inside the outer cylinder (20). A connecting rod (23) is fixedly connected to the outer wall of the baffle (22). The side of the connecting rod (23) away from the baffle (22) slides through into the outside of the outer cylinder (20). A drip hole (24) is opened inside the outer cylinder (20).

2. The motor winding repair and testing device according to claim 1, characterized in that: A bottom box (25) is fixedly connected to the outer wall of the outer cylinder (20). A slide rail (26) is provided inside the bottom box (25). A slide plate (27) is slidably connected inside the slide rail (26). The end of the connecting rod (23) away from the baffle (22) is fixedly connected to the outer wall of the slide plate (27). An electric push rod (28) is fixedly connected to the outer wall of the bottom box (25). The end of the electric push rod (28) contacts the outer wall of the slide plate (27).

3. The motor winding repair and testing device according to claim 2, characterized in that: A tension spring (29) is fixedly connected to the outer wall of the slide plate (27). The end of the tension spring (29) away from the slide plate (27) is fixedly connected to the inner wall of the bottom box (25). An external push rod (30) is fixedly connected to the outer wall of the slide plate (27).

4. The motor winding repair and testing device according to claim 1, characterized in that: The liquid guide tube (18) is connected to a liquid flow channel (31), and a sliding plate (32) is slidably connected through the liquid flow channel (31). The sliding plate (32) has a spray hole (33), and the end of the sliding plate (32) is fixedly connected to the outer push rod (30).

5. The motor winding repair and testing device according to claim 1, characterized in that: A rotating box (16) is rotatably connected to the outer wall of the vertical rod (10). Multiple liquid outlet holes (17) are provided on the vertical rod (10). All of the liquid outlet holes (17) are located inside the rotating box (16). The ends of the two liquid guide tubes (18) away from the bottom box (25) are connected to the interior of the rotating box (16).

6. The maintenance and testing device for motor windings according to claim 1, characterized in that: A marking disk (35) is fixedly connected to the outer wall of the vertical rod (10). The marking disk (35) is provided with an outer area (11) and an inner area (12). A visual detector (13) is fixedly connected to the outer wall of the marking disk (35).

7. The motor winding repair and testing device according to claim 1, characterized in that: Hydraulic rods (2) are fixedly connected to both sides of the base (1), and clamping mechanisms are provided on the hydraulic rods (2).

8. The maintenance and testing device for motor windings according to claim 7, characterized in that: The clamping mechanism includes a mounting base (3) fixedly connected to the end of the hydraulic rod (2), an electric rod (4) fixedly connected to the outer side wall of the mounting base (3), and a clamping claw (5) fixedly connected to the end of the electric rod (4) away from the mounting base (3). The two clamping claws (5) clamp the stator (8).

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