Convex drawing insulation slot wedge device of motor rotor

Abstract

The utility model relates to a convex drawing insulation slot wedge device for a motor rotor, which comprises a slot wedge main body and a convex block, and the slot wedge main body is strip-shaped; the section shape of the slot wedge main body is matched with the shape of the corresponding slot shoulder; the convex block is in a long strip shape; the shape of the section of the bump is matched with the shape of the notch of the corresponding rotor punching sheet; the bump is arranged on the outer surface of the top of the slot wedge main body; the bump and the slot wedge main body are integrally processed and manufactured; the section width of the bump is smaller than the width of the notch of the rotor punching sheet; the length of the convex drawing insulation slot wedge device of the motor rotor is cut according to the length of a notch of a corresponding rotor punching sheet. According to the utility model, risks of inter-turn, inter-phase and ground short circuit and motor burnout are reduced; the standardization degree and the universality of the slot wedge are improved; the cutting powder pollution is reduced; the probability of a groove overturning phenomenon is reduced; vibration and displacement of the coil in the groove due to electromagnetic force and in the high-speed operation process are avoided, and the performance of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a convex-type insulating slot wedge drawing device for a motor rotor. Background Art

[0002] The slot wedge is placed after all insulation including slot insulation and interlayer insulation padding is completed. In the motor winding, the insulation slot wedge has the dual functions of insulation reinforcement and space limitation.

[0003] Ordinary slot wedges are trapezoidal, narrow at the top and wide at the bottom, located at the slot shoulder, and above the slot wedge is the slot opening, which is generally 0.5-1.5mm long. When the motor rotor is wired and slotted, the next step is turning the rotor outer circle, generally 0.5-1mm per side. A lot of iron chips will be generated during the turning process, some of which will drill into the gap between the slot opening and the slot shoulder. Usually, operators will use a hair dryer to blow, but it is difficult to completely remove them.

[0004] The defects of the prior art are:

[0005] The iron chips generated during the turning process drill into the gap between the slot and the slot shoulder and are difficult to remove. The iron chips hidden in the slot are a great hidden danger to the motor. During the high-speed operation of the rotor and under the action of electromagnetic force, these hidden iron chips are very likely to damage the insulation of the stator and rotor, thereby causing short circuits between turns, between phases, and to the ground, and burning the motor. Summary of the invention

[0006] In view of the above problems, the utility model provides a motor rotor convex extraction insulating slot wedge device, which aims to reduce the risk of short circuit between turns, between phases, and to the ground and burning of the motor; improve the standardization and versatility of the slot wedge; reduce powder pollution generated during the cutting process; optimize the installation process and the installation firmness, and reduce the probability of slot flipping; avoid vibration and displacement of the coil in the slot due to electromagnetic force and during high-speed operation, and improve the performance of the motor.

[0007] In order to solve the above problems, the technical solution provided by the utility model is:

[0008] A motor rotor convex-type insulating slot wedge extraction device, a motor rotor convex-type insulating slot wedge extraction device, characterized in that: it comprises a slot wedge body and a convex block, wherein:

[0009] The shape of the slot wedge body is a long strip; the cross-sectional shape of the slot wedge body matches the shape of the corresponding slot shoulder;

[0010] The shape of the protrusion is a long strip; the cross-sectional shape of the protrusion matches the shape of the corresponding rotor punching slot;

[0011] The convex block is arranged on the top outer surface of the slot wedge body; the convex block and the slot wedge body are manufactured by integral processing;

[0012] The cross-sectional width of the protrusion is smaller than the width of the rotor punching slot;

[0013] The length of the motor rotor convex insulating slot wedge extraction device is cut according to the length of the corresponding rotor punching slot.

[0014] Preferably, the cross-sectional shape of the protrusion is a rectangle.

[0015] Preferably, the cross-sectional width of the protrusion is 0.2 mm to 0.4 mm smaller than the width of the rotor punching slot.

[0016] Preferably, the top surface of the protrusion is flush with the outer surface of the rotor punching notch.

[0017] Preferably, the top surface of the protrusion is 1 mm to 2 mm higher than the outer surface of the rotor punching notch.

[0018] Preferably, the cross-sectional shape of the slot wedge body is an isosceles trapezoid that is narrow at the top and wide at the bottom; the length of the top side of the cross-sectional trapezoid of the slot wedge body is equal to the length of the bottom side of the cross-sectional shape of the protrusion.

[0019] Preferably, the slot wedge body (1) is suitable for a motor rotor punching having the same size as the slot opening (4) of the rotor punching, and the slot shoulder (3) is wider than the slot wedge body (1); the slot shoulder (3) is wider than the slot wedge body (1) by 1 mm to 2 mm.

[0020] Preferably, the width of the rotor punching notch is 3.5 mm, and the corresponding width of the protrusion is 3.1 mm.

[0021] Compared with the prior art, the utility model has the following advantages:

[0022] 1. Since the convex block structure of the utility model can effectively block the notch, the iron filings generated by turning the outer circle of the rotor are blocked outside the rotor notch, thereby reducing the risk of short circuit between turns, between phases, and to the ground and burning the motor.

[0023] 2. Since the size of the motor slot is relatively fixed, unlike the slot shoulder position where the width varies greatly, the convex slot wedge positioned by the slot can be highly standardized and has strong versatility.

[0024] 3. The structure adopted by the utility model makes the drawing process simpler and does not need to be cut by machine according to different width sizes like ordinary slot wedges, thereby reducing powder pollution generated during the cutting process.

[0025] 4. Since the structure adopted by the utility model is consistent with the contours of the notch and the notch shoulder, the installation process is good and firm, and the notch flipping phenomenon is not easy to occur.

[0026] 5. Since the structure adopted by the utility model has a better limiting effect, it can effectively prevent the coil in the slot from vibrating and shifting due to electromagnetic force and high-speed operation, thereby improving the performance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a cross-sectional schematic diagram of a common rotor insulating slot wedge of the prior art of the utility model;

[0028] Figure 2 It is a cross-sectional schematic diagram of the convex extraction insulating slot wedge of the motor rotor of the utility model.

[0029] Among them: 1. slot wedge body, 2. bump, 3. slot shoulder, 4. rotor punching slot, 5. rotor coil, 6. ordinary rotor insulating slot wedge, 7. slot shoulder size, 8. iron filings generated by turning, 9. height of rotor punching slot before turning of rotor outer ring, 10. height of rotor punching slot after turning of rotor outer ring. DETAILED DESCRIPTION

[0030] The present invention is further explained below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0031] The motor rotor convex type insulating slot wedge device is characterized by comprising a slot wedge body 1 and a convex block 2, wherein:

[0032] The shape of the slot wedge body 1 is a long strip; the cross-sectional shape of the slot wedge body 1 matches the shape of the corresponding slot shoulder 3 .

[0033] The shape of the projection 2 is a long strip; the cross-sectional shape of the projection 2 matches the shape of the corresponding rotor punching notch 4.

[0034] The protrusion 2 is arranged on the top outer surface of the slot wedge body 1; the protrusion 2 and the slot wedge body 1 are manufactured in one piece.

[0035] The cross-sectional width of the projection 2 is smaller than the width of the rotor punching slot 4 .

[0036] The length of the motor rotor convex insulating slot wedge device is cut according to the length of the corresponding rotor punching slot 4.

[0037] It should be noted that the cross-sectional shape of the bump 2 is a rectangle.

[0038] It should be further explained that the cross-sectional width of the projection 2 is 0.2 mm to 0.4 mm smaller than the width of the rotor punching slot 4 .

[0039] It should be further explained that the top surface of the projection 2 is flush with the outer surface of the rotor punching notch 4 .

[0040] It should be further explained that the top surface of the projection 2 is 1 mm to 2 mm higher than the outer surface of the rotor punching notch 4 .

[0041] It should be noted that the cross-sectional shape of the slot wedge body 1 is an isosceles trapezoid that is narrow at the top and wide at the bottom; the length of the top side of the cross-sectional trapezoid of the slot wedge body 1 is equal to the length of the bottom side of the cross-sectional shape of the protrusion 2 .

[0042] It should be further explained that the slot wedge body 1 is suitable for motor rotor punchings with the same size as the rotor punching slot 4 and the slot shoulder 3 being wider than the slot wedge body 1; the slot shoulder 3 being wider than the slot wedge body 1 in the range of 1 mm to 2 mm.

[0043] In this specific embodiment, the width of the rotor punching slot 4 is 3.5 mm, and the corresponding width of the protrusion 2 is 3.1 mm.

[0044] In this specific embodiment, the height of the rotor punching notch 4 before turning the rotor outer ring is 1.25 mm; the height of the rotor punching notch 4 after turning the rotor outer ring is 0.5 mm.

[0045] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are clearly stated in each claim. On the contrary, as reflected in the appended claims, the invention is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0046] The disclosed embodiments are described above to enable any person skilled in the art to implement or use the present invention. Various modifications of these embodiments are obvious to those skilled in the art, and the general principles defined herein may also be applied to other embodiments without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments given herein, but is consistent with the broadest scope of the principles and novel features disclosed in this application.

[0047] The above description includes examples of one or more embodiments. Of course, it is impossible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments may be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications and variations that fall within the scope of protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", just as "including," is explained as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

[0048] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A motor rotor convex type insulating slot wedge extraction device, characterized in that: It comprises a slot wedge body (1) and a projection (2), wherein: The shape of the slot wedge body (1) is a long strip; the cross-sectional shape of the slot wedge body (1) matches the shape of the corresponding slot shoulder (3); The shape of the protrusion (2) is a long strip; the cross-sectional shape of the protrusion (2) matches the shape of the corresponding rotor punching notch (4); The convex block (2) is arranged on the top outer surface of the slot wedge body (1); the convex block (2) and the slot wedge body (1) are manufactured in an integrated manner; The cross-sectional width of the protrusion (2) is smaller than the width of the rotor punching slot (4); The length of the motor rotor convex insulating slot wedge extraction device is cut according to the length of the corresponding rotor punching slot (4).

2. The motor rotor convex insulating slot wedge extraction device according to claim 1 is characterized in that: The cross-sectional shape of the protrusion (2) is a rectangle.

3. The motor rotor convex insulating slot wedge extraction device according to claim 2 is characterized in that: The cross-sectional width of the projection (2) is 0.2 mm to 0.4 mm smaller than the width of the rotor punching slot (4).

4. The motor rotor convex insulating slot wedge extraction device according to claim 3 is characterized in that: The top surface of the protrusion (2) is flush with the outer surface of the rotor punching notch (4).

5. The motor rotor convex insulating slot wedge extraction device according to claim 3, characterized in that: The top surface of the protrusion (2) is 1 mm to 2 mm higher than the outer surface of the rotor punching notch (4).

6. The motor rotor convex insulating slot wedge extraction device according to any one of claims 1 to 5, characterized in that: The cross-sectional shape of the slot wedge body (1) is an isosceles trapezoid that is narrow at the top and wide at the bottom; the length of the top side of the cross-sectional trapezoid of the slot wedge body (1) is equal to the length of the bottom side of the cross-sectional shape of the protrusion (2).

7. The motor rotor convex insulating slot wedge extraction device according to any one of claims 1 to 6, characterized in that: The slot wedge body (1) is suitable for motor rotor punchings having the same size as the slot opening (4) of the rotor punching, and the slot shoulder (3) is wider than the slot wedge body (1); the slot shoulder (3) is wider than the slot wedge body (1) by 1 mm to 2 mm.

8. The motor rotor convex insulating slot wedge extraction device according to any one of claims 1 to 7, characterized in that: The width of the rotor punching notch (4) is 3.5 mm, and the corresponding width of the protrusion (2) is 3.1 mm.

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