Auxiliary dismounting tool for slot wedge of generator stator

Abstract

The utility model discloses an auxiliary dismounting tool for a slot wedge of a generator stator. The auxiliary dismounting tool comprises a dismounting tool main body and a dismounting handle, a handle mounting surface, a dismounting and mounting insertion tip and a dismounting and mounting boosting step are arranged on the dismounting and mounting tool main body; when the stator slot wedge is dismounted, the operation direction and angle of the dismounting insertion tip end are adjusted, so that the dismounting insertion tip end can be inserted into a gap between two adjacent stator slot wedges, the other end of the tool is knocked by a rubber hammer, the gap between the two stator slot wedges is increased, the direction of the tool is adjusted, and the dismounting boosting step is in contact with the stator slot wedge needing to be dismounted. The knocking is continued until the whole tool enters the space between the two stator slot wedges, and at the moment, the disassembly of the stator slot wedges can be completed by applying force and pushing outwards through the disassembly and assembly boosting step and the disassembly and assembly handle; when a new stator slot wedge is installed, the disassembly and assembly boosting step and the disassembly and assembly handle are used for applying force and pushing inwards, the operation is simple and labor-saving, the number of used matching tools is small, other parts are not contacted, and the operation is safe.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary tools for generator maintenance in large and medium-sized power stations, and particularly relates to an auxiliary disassembly and assembly tool for generator stator slot wedges. Background Art

[0002] The stator in large and medium-sized steam turbines mainly adopts a corrugated plate fixed structure for slot wedges, that is, a corrugated plate corresponding to the slot wedge is used to connect between the slot wedge and the wire slot. During the operation of the generator, a certain elastic force always acts on the inner side of the slot wedge. In this process, it is necessary to rely on the telescopic function of the corrugated plate with a certain elasticity to keep the slot wedge for installing the stator in a tightened state all the time. However, with the long-term operation of the generator set, the elasticity of the corrugated plate will decrease. When its deformation reaches a certain degree, the tightening and holding effect on the slot wedge will decrease significantly, and the slot wedge will become loose. The loosening of the slot wedge causes many hazards, such as damaging the insulator of the stator wire bar and affecting the normal heat dissipation of the generator. Therefore, it is necessary to withdraw the slot wedge to replace the corresponding corrugated plate and insulating gasket. Currently, the commonly used tools for withdrawing and assembling the slot wedge include flat-tip screwdrivers, square shovels, processed wooden boards, rubber hammers, etc. It needs to be realized with the cooperation of the above-mentioned various tools, with cumbersome operation, low efficiency, and it is very easy to damage the iron core, internal wire bars, etc. when used improperly. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an auxiliary disassembly and assembly tool for generator stator slot wedges with simple structure, safe use, high disassembly and assembly efficiency and convenient operation.

[0004] To solve the above technical problem, the technical solution of the utility model is: an auxiliary disassembly and assembly tool for generator stator slot wedges, including a disassembly and assembly tool main body, and a disassembly and assembly handle is fixedly installed on the disassembly and assembly tool main body;

[0005] The top end of the disassembly and assembly tool main body is provided with a flat handle installation surface, the disassembly and assembly handle is fixed on the handle installation surface, one end of the disassembly and assembly tool main body is provided with a disassembly and assembly insertion tip that gradually thins from inside to outside, and a disassembly and assembly boosting step is formed between the disassembly and assembly insertion tip and the bottom end of the disassembly and assembly tool main body, and the surface of the disassembly and assembly boosting step is set as a vertical surface.

[0006] As a preferred technical solution, the bottom of the disassembly and assembly tool main body is provided with an arc-shaped disassembly and assembly translation part that gradually rises from both ends to the middle and has a smooth transition.

[0007] As a preferred technical solution, one end of the disassembly and assembly tool main body opposite to the disassembly and assembly insertion tip is provided with an outwardly convex arc-shaped stress part.

[0008] As an improvement to the above technical solution, the arc surface between the disassembly and assembly boosting step and the disassembly and assembly translation part, and between the force receiving part and the disassembly and assembly translation part are smoothly connected in a transition manner.

[0009] Due to the adoption of the above technical solution, the generator stator slot wedge auxiliary disassembly and assembly tool includes a disassembly and assembly tool main body, and a disassembly and assembly handle is fixedly installed on the disassembly and assembly tool main body; a flat handle installation surface is provided at the top end of the disassembly and assembly tool main body, the disassembly and assembly handle is fixed on the handle installation surface, and one end of the disassembly and assembly tool main body is provided with a disassembly and assembly insertion tip that is tapered from inside to outside. A disassembly and assembly boosting step is formed between the disassembly and assembly insertion tip and the bottom end of the disassembly and assembly tool main body, and the surface of the disassembly and assembly boosting step is set as a vertical surface. The utility model has the following beneficial effects: When disassembling the stator slot wedge, the operator can hold the disassembly and assembly handle with one hand, adjust the operation direction and angle of the disassembly and assembly insertion tip so that it can be inserted into the gap between two adjacent stator slot wedges, tap the other end of the tool with a rubber hammer to increase the gap between the two stator slot wedges, adjust the tool direction and use the disassembly and assembly boosting step to contact the stator slot wedge to be disassembled, and continue to tap until the entire tool enters between the two stator slot wedges. At this time, by applying force and pushing out with the disassembly and assembly boosting step and the disassembly and assembly handle, the disassembly of the stator slot wedge can be completed; when installing a new stator slot wedge, then apply force and push in with the disassembly and assembly boosting step and the disassembly and assembly handle until the installation position of each stator slot wedge is reached. The operation is simple, labor-saving, uses few matching tools, and does not contact other components, and the operation is safe. Description of the Drawings

[0010] The following drawings are only intended to illustrate and explain the present utility model schematically and do not limit the scope of the present utility model. Among them:

[0011] Figure 1 is the structural schematic diagram of the embodiment of the present utility model;

[0012] Figure 2 is the schematic diagram of the cutting-in position when the embodiment of the present utility model is in use;

[0013] In the figure: 1 - disassembly and assembly tool main body; 11 - handle installation surface; 12 - disassembly and assembly insertion tip; 13 - disassembly and assembly boosting step; 14 - disassembly and assembly translation part; 15 - force receiving part; 2 - disassembly and assembly handle; 3 - U-shaped dovetail groove iron core; 4 - stator slot wedge; 5 - wire bar; 6 - corrugated plate; 7 - insulating gasket strip; 8 - measuring tool. Detailed Embodiment

[0014] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments. In the following detailed description, only some exemplary embodiments of the present utility model are described by way of illustration. Undoubtedly, those of ordinary skill in the art can recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present utility model. Therefore, the drawings and description are illustrative in nature and are not used to limit the scope of protection of the claims.

[0015] As Figure 1 shown, the auxiliary disassembly and assembly tool for the generator stator slot wedge includes a disassembly and assembly tool body 1, and a disassembly and assembly handle 2 is fixedly installed on the disassembly and assembly tool body 1. During use, hold the disassembly and assembly handle 2 and operate the disassembly and assembly tool body 1 to realize the disassembly and assembly of the stator slot wedge 4.

[0016] As Figure 1 shown, the top end of the disassembly and assembly tool body 1 is provided with a flat handle mounting surface 11, and the disassembly and assembly handle 2 is fixed on the handle mounting surface 11. One end of the disassembly and assembly tool body 1 is provided with a disassembly and assembly insertion tip 12 that gradually thins from the inside to the outside. A disassembly and assembly boosting step 13 is formed between the disassembly and assembly insertion tip 12 and the bottom end of the disassembly and assembly tool body 1, and the surface of the disassembly and assembly boosting step 13 is set as a vertical surface. The disassembly and assembly insertion tip 12 is used to insert into two adjacent stator slot wedges 4, and the disassembly and assembly boosting step 13 is used to limit and abut against the end face of the stator slot wedge 4 during operation, so as to realize moving the stator slot wedge 4 with the help of external force.

[0017] The bottom of the disassembly and assembly tool body 1 is provided with an arc-shaped disassembly and assembly translation part 14 that gradually rises from both ends to the middle and has a smooth transition. During disassembly and assembly, it forms a support for the tool, and drives the entire tool to generate translation under the action of external force. While translating, it realizes the pushing of the stator slot wedge 4 to realize its disassembly and assembly. The setting of the disassembly and assembly translation part 14 makes it have less contact with other components of the generator during use, thereby reducing friction and the probability of wear of other components.

[0018] One end of the disassembly and assembly tool body 1 opposite to the disassembly and assembly insertion tip 12 is provided with an outwardly protruding arc-shaped force-receiving part 15, which is convenient for contacting with a rubber hammer used in cooperation for knocking, and the force is concentrated. An arc-shaped smooth transition connection is respectively formed between the disassembly and assembly boosting step 13 and the disassembly and assembly translation part 14, and between the force-receiving part 15 and the disassembly and assembly translation part 14, so as to avoid edges and corners from scratching other components of the generator.

[0019] In Figure 2A set of stator slot wedges 4 and related components are shown, specifically including a U-shaped dovetail core 3, a wire bar 5, a corrugated plate 6, an insulating gasket 7, etc. The stator slot wedge 4 is encapsulated and arranged at the top of the U-shaped dovetail core 3, and there are also a closing slot wedge, an air gap partition, etc. used in cooperation. Their specific structures and assembly relationships are well-known to those of ordinary skill in the art and will not be described in detail here. This embodiment involves two processes of removing and assembling the stator slot wedge 4, that is, the disassembly and assembly process of the stator slot wedge 4.

[0020] When removing the stator slot wedge 4, it is necessary to first use the measuring tool 8 to find the loose stator slot wedge 4 and mark it with a number; then cut off the binding rope of the closing slot wedge, remove the closing slot wedge and the air gap partition, and disassemble each stator slot wedge 4 in sequence from the outside to the inside until the stator slot wedge 4 with the number mark is pushed out. In this embodiment, a set of three stator slot wedges 4 are provided as an example, and the stator slot wedge 4 to be replaced is located in the middle position. First, push out the stator slot wedge 4 outside the stator slot wedge 4 to be replaced. The specific pushing process is as follows:

[0021] Hold the disassembly and assembly handle 2, make the disassembly and assembly insertion tip 12 face downwards, and insert the disassembly and assembly insertion tip 12 downwards into the end gap of the stator slot wedge 4 to be replaced in the direction shown in Figure 2 . During the insertion process, the force application part 15 can be struck with a rubber hammer to make the gap larger, and then adjust the direction and angle of the tool so that the vertical surface of the disassembly and assembly boosting step 13 is in partial contact with the surface of the outer stator slot wedge 4. At this time, the disassembly and assembly translation part 14 will contact the stator slot wedge 4 to be replaced to obtain support. Continue to strike the force application part 15, and use the cooperation of the continuous change of the support positions of the disassembly and assembly boosting step 13 and the disassembly and assembly translation part 14 to continuously increase the gap between the two stator slot wedges 4; when the gap is large enough, limit the connection part between the disassembly and assembly boosting step 13 and the disassembly and assembly insertion tip 12 on the upper edge of the stator slot wedge 4, and continue to strike the force application part 15 to gradually push out the stator slot wedge 4. During the subsequent pushing process, the disassembly and assembly translation part 14 forms support for the tool and only has a line contact with other components, with a small contact area and small wear; after pushing out the outer stator slot wedge 4, push out the stator slot wedge 4 to be replaced in the same way, and take out the corrugated plate 6 and the insulating gasket 7 for replacement.

[0022] After the replacement of the corrugated plate 6 and the insulating gasket 7 is completed, reassemble the disassembled stator slot wedges 4 in sequence from the inside to the outside. The specific process is as follows:

[0023] Push the stator slot wedge 4 into the end of the U-shaped dovetail core 3. Hold the disassembly and assembly handle 2 by hand, so that the disassembly and assembly boosting step 13 abuts against the side surface of the stator slot wedge 4, and the disassembly and assembly insertion tip 12 extends and overlaps above the stator slot wedge 4. The disassembly and assembly insertion tip 12 and the disassembly and assembly boosting step 13 cooperate to form a force application limit. Use a rubber hammer to strike the force-receiving part 15 to push the stator slot wedge 4 to translate until its installation position. Then, assemble the outer stator slot wedge 4 according to the same steps. During the assembly process, the disassembly and assembly translation part 14 can support the tool. After each stator slot wedge 4 is assembled, press the closing slot wedge and fix the air gap partition board.

[0024] The description of the present invention has been given for purposes of illustration and description, and is not intended to be exhaustive or to limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, and to enable others of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for the particular use.

Claims

1. Generator stator slot wedge auxiliary disassembly and assembly tool, characterized by: It comprises a disassembly and assembly tool body, on which a disassembly and assembly handle is fixedly mounted; A flat handle mounting surface is provided at the top of the disassembly and assembly tool body, and the disassembly and assembly handle is fixed on the handle mounting surface. A disassembly and assembly insertion tip which is gradually thinner from the inside to the outside is provided at one end of the disassembly and assembly tool body, and a disassembly and assembly boosting step is formed between the disassembly and assembly insertion tip and the bottom end of the disassembly and assembly tool body, and the surface of the disassembly and assembly boosting step is set as a vertical surface.

2. The generator stator slot wedge auxiliary disassembly and assembly tool according to claim 1, characterized in that: The bottom of the disassembly and assembly tool body is provided with an arc-shaped disassembly and assembly translation portion which gradually rises and smoothly transitions from the two ends to the middle.

3. The generator stator slot wedge auxiliary disassembly and assembly tool according to claim 2, characterized in that: An arc-shaped force-bearing portion protruding outward is provided at one end of the disassembly and assembly tool body opposite to the disassembly and assembly insertion tip.

4. The generator stator slot wedge auxiliary disassembly and assembly tool according to claim 3, characterized in that: The disassembly and assembly assisting step and the disassembly and assembly translation part, and the force-bearing part and the disassembly and assembly translation part are connected in a smooth transitional manner with an arc surface.

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