Connecting ring for preventing damping ring of large synchronous motor from deforming

Abstract

The utility model provides a connecting ring for preventing deformation of a damping ring of a large-scale synchronous motor, which comprises a pole shoe, the end part of the pole shoe is provided with a damping ring and a connecting ring, the damping ring and the connecting ring are connected with the pole shoe through bolts, the other side of the damping ring is provided with a plurality of deformation plates, and the adjacent deformation plates are connected through a jacking clamp; the deformation plate comprises a U-shaped plate, extension plates are arranged at the two ends of the U-shaped plate, and the extension plates are perpendicular to the U-shaped plate. According to the utility model, the damping ring and the connecting ring are additionally arranged on the pole shoe, so that the problem of deformation of the damping ring caused by starting current and electromagnetic force in the starting process of the synchronous motor can be effectively solved, and equipment accidents are prevented.

Description

Technical Field

[0001] This utility model belongs to the field of synchronous motor technology and relates to a connecting ring that prevents deformation of the damping ring of a large synchronous motor. Background Technology

[0002] Large synchronous motors have a damping ring on each side of the rotor, made of copper. During startup, the damping rings induce a large current, causing them to heat up and deform. Since the damping rings are welded to the pole shoes, deformation can lead to the welds breaking, potentially causing motor malfunction. Therefore, large synchronous motors use a flexible connection between the damping rings of each pole to eliminate deformation caused by heat and electromagnetic forces. However, when the synchronous motor capacity reaches a certain power, this connection method still cannot completely eliminate the deformation caused by heat and electromagnetic forces. Utility Model Content

[0003] The purpose of this invention is to address the problems existing in the prior art by providing a connecting ring that prevents deformation of the damping ring of a large synchronous motor. This solves the problem that the damping ring of a large synchronous motor may deform during motor startup due to starting current and electromagnetic force, potentially causing equipment accidents during motor operation.

[0004] Therefore, the present invention adopts the following technical solution:

[0005] A connecting ring for preventing deformation of the damping ring of a large synchronous motor includes a pole shoe. The pole shoe end is provided with a damping ring and a connecting ring, which are connected to the pole shoe by bolts. The other side of the damping ring is provided with a plurality of deformable plates arranged in a ring, and adjacent deformable plates are connected by a clamping fixture.

[0006] The deformable plate includes a U-shaped plate, and extension plates are provided at both ends of the U-shaped plate, which are set perpendicular to the U-shaped plate.

[0007] Furthermore, the distance between the damping ring and the pole shoe is less than the distance between the connecting ring and the pole shoe; specifically, the distance between the damping ring and the pole shoe is 90mm, and the distance between the connecting ring and the pole shoe is 120mm. The connecting ring, damping ring and pole shoe are tightly connected into a whole by bolts, which greatly improves the mechanical strength between the connecting ring, damping ring and pole shoe.

[0008] Furthermore, the extension plate is made of a deformable material, specifically copper with excellent plastic deformation properties, thereby reducing rotor oscillation and ensuring stable operation of the motor.

[0009] Furthermore, the opening of the U-shaped plate faces the damping ring. The purpose of this arrangement is to increase the plastic deformation capacity of the U-shaped plate and reduce the impact of the displacement between the damping rings on the U-shaped plate.

[0010] Furthermore, the connecting ring is made of steel; specifically, the connecting ring is made of high carbon steel, thereby improving the mechanical strength of the connecting damping ring and the various components of the pole shoe.

[0011] Furthermore, the inner and outer diameters of the connecting ring and the damping ring are the same; specifically, the inner diameter of the damping ring is 1200mm and the outer diameter is 1250mm.

[0012] The beneficial effects of this utility model are as follows:

[0013] This invention effectively solves the problem of damping ring deformation caused by starting current and electromagnetic force during synchronous motor startup by adding a damping ring and a connecting ring to the pole shoe, thus preventing equipment accidents. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] In the diagram, 1-connecting ring, 2-damping ring, 3-pole shoe, 4-bolt, 5-deformation plate, 5a-U-shaped plate, 5b-extension plate, 6-clamping fixture. Detailed Implementation

[0016] The technical solution of this utility model will be described below with reference to the accompanying drawings and implementation methods.

[0017] like Figure 1 As shown, a connecting ring for preventing deformation of the damping ring of a large synchronous motor includes a pole shoe 3. The end of the pole shoe 3 is provided with a damping ring 2 and a connecting ring 1, and the distance between the damping ring 2 and the pole shoe 3 is less than the distance between the connecting ring 1 and the pole shoe 3.

[0018] The connecting ring 1 and the damping ring 2 are connected to the pole shoe 3 by bolts 4. Specifically, the connecting ring 1 is made of steel.

[0019] The other side of the damping ring 2 is provided with several deformable plates 5, and the two are connected by a clamping fixture 6. Specifically, the clamping fixture 6 adopts an existing fixture. Since the present invention does not improve its structure, and its working principle and structure are well known to those skilled in the art, it will not be described in detail here.

[0020] The deformable plate 5 includes a U-shaped plate 5a, with extension plates 5b at both ends of the U-shaped plate 5a, which are perpendicular to the U-shaped plate 5a; further, the opening of the U-shaped plate 5a faces the damping ring 2; the extension plates 5b are made of deformable material.

[0021] The working principle of this utility model is as follows:

[0022] Connecting ring 1 connects each individual pole shoe 3 into a whole, thereby increasing the mechanical strength of pole shoe 3 and damping ring 2. The three together constitute a damping winding. The damping winding serves as a starting winding, generating asynchronous starting torque when the synchronous motor starts asynchronously, thus starting the motor. When the synchronous motor oscillates during operation, an induced current is generated in the damping winding. This induced current interacts with the rotating magnetic field, generating a torque that resists the rotor's movement relative to the rotating magnetic field, thereby reducing the oscillation of the synchronous motor and improving its stability.

Claims

1. A connecting ring for preventing deformation of a damper ring of a large synchronous machine, characterized by, It comprises a pole shoe (3), the pole shoe (3) is equipped with damping ring (2) and connecting ring (1) on the end, and both are connected with pole shoe (3) through bolt (4), the other side of damping ring (2) is equipped with several deformation plate (5) in annular arrangement, and adjacent deformation plate (5) is connected through top clamp (6); The deformation plate (5) comprises a U-shaped plate (5a), both ends of the U-shaped plate (5a) are provided with an extension plate (5b) which is arranged vertically to the U-shaped plate (5a).

2. A connecting ring for preventing deformation of a damper ring of a large synchronous machine according to claim 1, characterized in that, The distance between the damping ring (2) and the pole shoe (3) is less than the distance between the connecting ring (1) and the pole shoe (3).

3. A connecting ring for preventing deformation of a damper ring of a large synchronous machine according to claim 1, characterized in that, The connecting ring (1) is made of steel material.

4. A connecting ring for preventing deformation of a damper ring of a large synchronous machine according to claim 1, characterized in that, The extension plate (5b) is made of deformable material.

5. A connecting ring for preventing deformation of a damping ring of a large synchronous machine according to claim 1, characterized in that, The opening position of the U-shaped plate (5a) faces the damping ring (2).

Images