WO2019062483A1

WO2019062483A1 - Insulation and protection-enhanced motor end ring fixing base

Info

Publication number: WO2019062483A1
Application number: PCT/CN2018/103860
Authority: WO
Inventors: 于亮; 邓方林; 车三宏; 邵平安; 王晓慧; 杨晔
Original assignee: 江苏中车电机有限公司
Priority date: 2017-09-28
Filing date: 2018-09-03
Publication date: 2019-04-04
Also published as: CN107733119A

Abstract

The present invention provides an insulation and protection-enhanced motor end ring fixing base. The base comprises a L-shaped fixing base and a U-shaped insulating groove. The L-shaped fixing base comprises a first rod member and a second rod member. A screw hole axially passes through the first rod member, and a screw passes through the screw hole to serially connect a plurality of L-shaped fixing bases. The first rod member and the second rod member are perpendicularly disposed to form an L-shaped surface. Two mutually perpendicular external side surfaces of the L-shaped surface and the U-shaped insulating groove are attached together. A free end of the U-shaped insulating groove and an end portion of the first rod member are flush. An inner surface of the U-shaped insulating groove matches an external surface of an end ring. A U-shaped composite foil insulating paper is attached at an end ring groove of the fixing base of the present invention. Thus, there is no need to form a rounded corner having a 2 mm radius at each edge as in a conventional fixing base, thereby reducing the machining difficulty of the fixing base. Further, when assembling the end ring, the end ring insulation can be effectively protected so as to prevent damage, thereby reducing the operation difficulty of the assembling of the end ring.

Description

Insulation protection reinforced end ring fixing seat for motor

Technical field

The invention belongs to the field of electric machines, and more particularly relates to an insulation protection type end ring fixing seat structure for a motor.

Background technique

Electric motors are widely used in life and production, including generators and engines, and their stators or rotors are generally made of iron cores. It consists of coils, slot insulation, interlayer spacers, temperature measuring components, and end rings. The end ring (conducting ring) motor is an important part of the motor, especially for medium and large motors, the number of end rings is large, the volume is large and the weight is heavy, the firmness of the end ring is fixed, and the end ring insulation protection is good or bad. It will affect the performance and service life of the generator, and because the end ring is bulky, heavy, and numerous, the end ring insulation may be damaged by collision or extrusion during assembly and it is difficult to find.

At present, the common structure for large motors is the structure of the fixed seat plus screw with end ring groove. The overall structure is shown in Figure 1, and the structure of the end ring fixing seat is shown in Figure 2. The end ring fixing seat is in direct contact with the end ring. If the end ring insulation is damaged or weak, and the upper and lower end ring fixing seats are difficult to ensure complete closeness, the insulation resistance of the motor winding to the ground may be large when the generator is wet. The amplitude of the existing end ring fixing seat needs to be inverted R2 rounded corners, which is difficult to process, and it is difficult to ensure the processing is qualified. Unqualified edges or sharp corners may damage the insulation during the assembly of the end ring, affecting the motor. Insulation performance.

Summary of the invention

SUMMARY OF THE INVENTION An object of the present invention is to provide an insulation protection-reinforced end ring mount for a motor which can improve the insulation performance of a motor after fixing.

According to an aspect of the invention, an insulation protection reinforced end ring mount for an electric machine is provided, comprising an L-shaped mount and a U-shaped insulating groove.

The L-shaped fixing base includes a first rod body and a second rod body disposed perpendicularly to each other, and the first rod body is provided with a bolt hole axially penetrating through the body, and the screw passes through the bolt hole to fix a plurality of the L-shaped holes The first rod body and the second rod body are vertically disposed to form an L-face, and the L-face is closely connected with two mutually perpendicular outer sides of the U-shaped insulating groove. The free end of the type of insulating groove is flush with the end of the first rod, and the inner surface of the U-shaped insulating groove cooperates with the outer surface of the end ring.

In some embodiments, the U-shaped insulating groove includes a first slot plate, a second slot plate, and a third slot plate, the first slot plate and the second slot plate being disposed in parallel, the third slot plate One end is connected to the first slot plate, the other end of the third slot plate is connected to the second slot plate, and the first slot plate and the second slot plate are located on the same side of the third slot plate .

In some embodiments, the first slot plate and the third slot plate are vertically disposed, and the second slot plate and the third slot plate are vertically disposed.

In some embodiments, the U-shaped insulating groove and the L-face of the L-shaped fixing seat are connected by a double-sided tape.

In some embodiments, an outer surface of the first slot plate is adhered to an inner surface of the first rod by the double-sided tape, and an outer surface of the third slot plate is attached to the outer surface by a double-sided tape On the inner surface of the second rod.

In some embodiments, the first slot plate, the second slot plate, and the third slot plate are of unitary construction.

In some embodiments, the free end of the first slot plate is flush with the end of the first shaft.

In some embodiments, the U-shaped insulating groove is made of an insulating material, and the U-shaped insulating groove is made of a composite foil or a fiber mat.

In some embodiments, the first rod body and the second rod body are of unitary structure.

In some embodiments, the bolt is threadedly connected to the nut through a bolt hole of the first rod body of the plurality of L-shaped fixing seats, and the plurality of the first rod bodies are located in a straight line, and the plurality of the second rod bodies are Parallel settings.

The utility model has the beneficial effects that the U-shaped composite foil insulating paper is adhered to the end ring groove of the fixing seat of the invention, and the rounding of the R2 of the original fixing seat can be omitted first, thereby reducing the processing difficulty of the fixing seat, and secondly, the protection can be effectively protected. When the end ring is assembled, the damage of the end ring is insulated, which reduces the difficulty of assembling the end ring. Finally, the insulation strength between the end ring and the surrounding structure (such as the screw) can be enhanced, and the insulation resistance of the motor winding to the ground after the damp is not lowered due to the insulation of the end ring. The phenomenon ensures the overall insulation performance of the motor and improves the reliability of the motor.

DRAWINGS

1 is a schematic structural view of a conventional end ring fixing structure;

2 is a schematic structural view of a conventional end ring fixing base;

FIG. 3 is a schematic structural view of an insulation protection type end ring fixing seat for a motor according to an embodiment of the present invention.

Detailed ways

Fig. 3 is a view schematically showing an insulation protection-reinforced end ring mount for a motor according to an embodiment of the present invention. As shown in FIG. 3, the insulation protection type end ring fixing base for the motor includes an L-shaped fixing base 1 and a U-shaped insulating groove 2.

The L-shaped mount 1 includes a first rod body 101 and a second rod body 102. The first rod body 101 and the second rod body 102 are vertically disposed. In this embodiment, the diameter of the first rod 101 is larger than the diameter of the second rod 102, and the length of the first rod 101 is smaller than the length of the second rod 102. The first rod body 101 and the second rod body 102 are of a unitary structure, which is simple to manufacture and relatively durable. The first rod body 101 is provided with a bolt hole 11 penetrating the axial direction. The bolt hole 11 is a through hole. The screw thread is threadedly connected to the nut through the bolt hole 11 of the first rod body 101 of the plurality of L-shaped mounts 1, and the plurality of L-shaped mounts 1 are connected in series. The first rod bodies 101 of the plurality of L-shaped mounts are located in a straight line, and the second rod bodies 102 of the plurality of L-shaped mounts are disposed in parallel. The first rod body 101 and the second rod body 102 are vertically disposed to form an L-face. The U-shaped insulating groove 2 includes a first groove plate 21, a second groove plate 22, and a third groove plate 23. The first groove plate 21 and the second groove plate 22 are disposed in parallel. One end of the first groove plate 21 is connected to one end of the third groove plate 23, the first groove plate 21 is disposed perpendicular to the third groove plate 23, and the other end of the second groove plate 22 is connected to the other end of the third groove plate 23. The second slot plate 22 is disposed perpendicular to the third slot plate 23. The first slot plate 21 and the second slot plate 22 are located on the same side of the third slot plate 23. The first groove plate 21, the second groove plate 22, and the third groove plate 23 are of a unitary structure. This prevents a loophole in the U-shaped insulating groove 2. Two perpendicular outer sides of the U-shaped insulating groove 2 are closely connected with the L surface of the L-shaped fixing base 1, and the U-shaped insulating groove 2 and the L surface of the L-shaped fixing base 1 are connected by the double-sided tape 3, and are operated. simple. Specifically, the opposite side of the first slot plate 21 and the second slot plate 22 is an inner surface, and the other surface of the first slot plate 21 is an outer surface; the third slot plate 23 faces the first slot plate 21 and the second slot plate 22 One side is the inner surface, and the other side of the third groove plate 23 is the outer surface. The outer surface of the first groove plate 21 is adhered to the inner surface of the first rod body 101 for forming the L surface by the double-sided tape 3, and the outer surface of the third groove plate 23 is attached to the second rod body 102 by the double-sided tape 3 Used to form the inner surface of the L-face. In this embodiment, the U-shaped insulating groove 2 is made of an insulating material. The U-shaped insulating groove 2 may be a composite foil or a fiber mat. In this embodiment, the U-shaped insulating groove 2 is a composite foil. The composite foil is a F-class or H-grade composite insulation material with good insulation effect. The free outer side of the U-shaped insulating groove 2 is flush with the end of the first rod 101 for later installation and use. Specifically, the free ends of the first groove plate 21 and the second groove plate 22 are flush with the first rod body 101. The inner surface of the U-shaped insulating groove 2 is matched with the outer surface of the end ring, so that the end ring can be locked in the U-shaped insulating groove 2. The U-shaped composite foil insulating paper is adhered to the end ring groove of the fixing seat of the invention. Firstly, the rounded corners of the original fixing seat can be omitted, thereby reducing the processing difficulty of the fixing seat, and secondly, the end ring can be effectively protected. Insulation of the damaged end ring reduces the difficulty of assembling the end ring. Finally, the insulation strength between the end ring and the surrounding structure (such as the screw) can be enhanced, and the insulation resistance of the motor winding to the ground after the damp is not reduced due to the insulation of the end ring. Ensure the insulation performance of the motor as a whole and improve the reliability of the motor.

What has been described above is only some embodiments of the invention. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and scope of the invention.

Claims

The utility model relates to an insulation protection reinforced end ring fixing seat for a motor, which comprises an L-shaped fixing seat and a U-shaped insulating groove.

The L-shaped fixing base includes a first rod body and a second rod body disposed perpendicularly to each other, and the first rod body is provided with a bolt hole axially penetrating through the body, and the screw passes through the bolt hole to fix a plurality of the L-shaped holes The first rod body and the second rod body are vertically disposed to form an L-face, and the L-face is closely connected with two mutually perpendicular outer sides of the U-shaped insulating groove. The free end of the type of insulating groove is flush with the end of the first rod, and the inner surface of the U-shaped insulating groove cooperates with the outer surface of the end ring.
The insulation protection type end ring fixing base for a motor according to claim 1, wherein the U-shaped insulating groove comprises a first groove plate, a second groove plate and a third groove plate, and the first groove plate Arranging in parallel with the second slot plate, one end of the third slot plate is connected to the first slot plate, and the other end of the third slot plate is connected to the second slot plate, the first slot The plate and the second slot plate are located on the same side of the third slot plate.
The insulation protection type end ring fixing base for a motor according to claim 2, wherein the first groove plate and the third groove plate are vertically disposed, the second groove plate and the third groove The board is set vertically.
The insulation protection type end ring fixing base for a motor according to claim 3, wherein the U-shaped insulating groove and the L-face of the L-shaped fixing base are connected by a double-sided tape.
The insulation protection type end ring fixing base for a motor according to claim 4, wherein an outer surface of the first groove plate is attached to an inner surface of the first rod body by the double-sided tape, The outer surface of the third slot plate is attached to the inner surface of the second rod by a double-sided tape.
The insulation protection type end ring fixing base for a motor according to claim 2, wherein the first groove plate, the second groove plate and the third groove plate have an integral structure.
The insulated protective reinforced end ring mount for a motor according to claim 2, wherein the free end of the first slot plate is flush with the end of the first shaft.
The insulation protection type end ring fixing base for a motor according to claim 1, wherein the U-shaped insulating groove is made of an insulating material, and the U-shaped insulating groove is made of a composite foil or a fiber felt. .
The insulation protection type end ring fixing base for a motor according to claim 1, wherein the first rod body and the second rod body have an integral structure.
The insulation protection type end ring fixing base for a motor according to claim 1, wherein the bolt is threadedly connected to the nut through a bolt hole of the first rod body of the plurality of L-shaped fixing seats, and the plurality of The first rod body is located on a straight line, and the plurality of the second rod bodies are disposed in parallel.