Stator coil evolvent pressing device

Abstract

The utility model discloses a stator coil evolvent pressing device, and belongs to the field of steam turbine machining auxiliary devices. The stator coil evolvent pressing device comprises a transverse pressing block, a first screw hole and a second screw hole are formed in the transverse pressing block, a positioning screw penetrates through the first screw hole and is fastened through a nut, a pressing screw penetrates through the second screw hole, and a pressing cap is arranged at the bottom of the pressing screw and is matched with the pressing block to press an evolvent. According to the utility model, the end part evolvent can be effectively fixed, the mould pressing manufacturability of the coil bar is improved, the consistency of the end part of the coil bar is enhanced, and the appearance quality of the coil bar is improved.

Description

Technical Field

[0001] This invention belongs to the field of steam turbine processing auxiliary devices, specifically, it relates to a stator coil involute clamping device. Background Technology

[0002] like Figure 1 As shown, the stator coils of the 60MW and 75MW series generators have a relatively large height and width ratio. Each conductor bar consists of 64 copper wires arranged in two rows. The conductor bars have a large height-to-width ratio and long involutes, while the flat copper wires composing the conductor bars have a relatively small gauge. Therefore, during the production process of this series of stator coils, it is difficult to fix the shape of the involutes at the ends. Figure 2 As shown, there is a certain degree of elastic deformation, especially in the height direction, which has a certain impact on the consistency of the bar and the overall appearance.

[0003] Therefore, there is an urgent need for a clamping device for the stator coil involute that can effectively fix the end involute. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a stator coil involute clamping device, which can effectively fix the end involute, improve the molding process of the coil bar, enhance the consistency of the coil bar ends, and improve the appearance quality of the coil bar.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A stator coil involute clamping device includes a horizontal clamping block, which has a first screw hole and a second screw hole. A positioning screw passes through the first screw hole and is fastened by a nut. A clamping screw passes through the second screw hole. The bottom of the clamping screw is provided with a clamping cap, which cooperates with the clamping block to clamp the involute.

[0007] A further technical solution is that the pressing block includes a U-shaped block with a through groove inside.

[0008] In a further technical solution, a washer is provided between the nut and the horizontal pressure block on the positioning screw to further enhance the fixation between the positioning screw and the horizontal pressure block.

[0009] A further technical solution is that the pressure cap is threaded to the bottom of the pressure screw, which facilitates disassembly and assembly.

[0010] A further technical solution is that the bottom of the pressure cap is provided with anti-slip texture to increase the friction between the pressure cap and the pressure block.

[0011] In a further technical solution, during use, the pressure block is placed on the pressure strip of the baking and pressing mold, and the involute of the stator coil is located below the pressure strip. Beneficial effects

[0012] Compared with the prior art, the utility model has following outstanding advantages:

[0013] The utility model discloses through the cooperation of the block and the cap, increase the stress by increasing the end pressure area, can effectively fix the involute, cooperate the use of the baking press mould, can effectively improve the mould pressing process of the involute, strengthen the consistency of stator coil wire bar end portion, promote wire bar appearance quality. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structure schematic diagram of stator coil;

[0015] Figure 2 It is the structure schematic diagram of involute;

[0016] Figure 3 It is the structure schematic diagram of the utility model;

[0017] Figure 4 It is the front view of horizontal pressure block;

[0018] Figure 5 It is the plan view of horizontal pressure block;

[0019] Figure 6 It is the structure schematic diagram of block;

[0020] Mark in drawing: 1, horizontal pressure block, 1-1, first screw hole, 1-2, second screw hole, 2, positioning screw rod, 3, nut, 4, cap, 5, block, 5-1, block, 5-2, through slot, 7, gasket, 8, baking press mould, 9, pressure strip. DETAILED DESCRIPTION

[0021] The utility model will be explained in detail below in combination with embodiment and application example.It needs to point out that the embodiment is the better implementation of the utility model, and is not the limit of the utility model's protection range, and the application and use method of the utility model are not limited to the application example. EMBODIMENT

[0022] As Figure 3 - 6 shows a stator coil involute pressure device, including horizontal pressure block 1, the first screw hole 1-1 and the second screw hole 1-2 are equipped on the horizontal pressure block, positioning screw rod 2 passes through the first screw hole 1-1 and is fastened by nut 3, and pressure screw 3 passes through the second screw hole 1-2, and the bottom of pressure screw 3 is equipped with cap 4, and the cap 4 is used in cooperation with block 5 to press the involute 6.

[0023] The block 5 includes the block 5-1 in the shape of a Chinese character, and the through slot 5-2 is arranged in the block.

[0024] The positioning screw rod 2 is equipped with gasket 7 between the nut 3 and the horizontal pressure block 1.

[0025] The bottom of the pressing cap 4 is provided with anti-skid lines.

[0026] In use, the pressing block 5 is arranged on the pressing strip 9 of the drying and pressing mold 8, and the involute 6 of the stator coil is located below the pressing strip 9.

[0027] The working method of the utility model is as follows:

[0028] 1. First, fix the positioning screw on the existing drying and pressing mold, place the horizontal pressing block at the step of the positioning screw, fasten with the washer and the nut, install the pressing screw in the other threaded hole of the horizontal pressing block;

[0029] 2. Fix the pressing block at intervals (can be fixed by welding) on the end pressing strip of the existing drying and pressing mold, increase the contact surface of the pressing screw and the pressing strip, locate the involute below the pressing strip, adjust the position of the pressing cap by adjusting the height of the pressing screw, make the bottom surface of the wire rod close to the involute part fit the curved surface of the end of the drying and pressing mold, realize effective pressing, when the mold is assembled and lowered, the horizontal pressing block can be rotated by 180°, which is convenient for clamping and removing the wire rod.

Claims

1. A stator coil evolute presser device, characterized by: The transverse pressing block is provided with a first screw hole and a second screw hole, a positioning screw rod passes through the first screw hole and is fastened by a nut, and a pressing screw rod passes through the second screw hole, and the bottom of the pressing screw rod is provided with a pressing cap which cooperates with the transverse pressing block to press the involute.

2. A stator coil evolute presser device according to claim 1 characterised in that: The transverse pressing block is provided with a first screw hole and a second screw hole, a positioning screw rod passes through the first screw hole and is fastened by a nut, and a pressing screw rod passes through the second screw hole, and the bottom of the pressing screw rod is provided with a pressing cap which cooperates with the transverse pressing block to press the involute.

3. The stator coil evolute presser device of claim 1, wherein: The transverse pressing block is provided with a first screw hole and a second screw hole, a positioning screw rod passes through the first screw hole and is fastened by a nut, and a pressing screw rod passes through the second screw hole, and the bottom of the pressing screw rod is provided with a pressing cap which cooperates with the transverse pressing block to press the involute.

4. The stator coil evolute presser device of claim 1, wherein: The transverse pressing block is provided with a first screw hole and a second screw hole, a positioning screw rod passes through the first screw hole and is fastened by a nut, and a pressing screw rod passes through the second screw hole, and the bottom of the pressing screw rod is provided with a pressing cap which cooperates with the transverse pressing block to press the involute.

5. A stator coil evolute presser device according to claim 1 or 4, characterised in that: The transverse pressing block is provided with a first screw hole and a second screw hole, a positioning screw rod passes through the first screw hole and is fastened by a nut, and a pressing screw rod passes through the second screw hole, and the bottom of the pressing screw rod is provided with a pressing cap which cooperates with the trans 6. The stator coil evolute crimping device of claim 1, wherein: ​

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