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A processing method for a large integral yoke ring

A processing method and technology of magnetic yoke ring, applied in the direction of manufacturing stator/rotor body, etc., can solve the problems of inability to discharge iron chips from the same hinge bolt hole, poor processing accuracy and processing efficiency, etc., to ensure the consistency of the keyway and shorten the processing. time, the effect of improving manufacturing accuracy

Active Publication Date: 2021-01-01
DONGFANG ELECTRIC MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The manufacturing process for the rigid yoke of the motor rotor of the large-scale pumped storage generator disclosed in this patent document solves the problem that the bolt holes of the same hinge cannot discharge iron filings, but it cannot process the inner and outer keyways at the same time to ensure the consistency of the keyways and the machining accuracy. and processing efficiency are poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for processing a large integral yoke ring, comprising the following steps:

[0023] a. Single-piece and small-section processing. Single-piece is turned by turning. Drill the joint hole on the single-piece. The small section is leveled and closed with the bottom surface. Then drill the positioning pin hole and tighten it. First, rough open the straight groove, and then rough-mill the inside keyways and external keyways;

[0024] b. The yoke is stacked. Lift the first section of the yoke to the square box with the yoke small section lifting tool, add gaskets to level the first section of the yoke, check the level of the first section of the yoke with a frame level, and fix the first section of the yoke with a strapping plate. For the yoke section, hoist the second section yoke with the yoke small section hoisting tool, rotate the second section yoke to the same +X and +Y direction as the first section yoke, before the yoke section falls, use the yoke section bet...

Embodiment 2

[0030] A method for processing a large integral yoke ring, comprising the following steps:

[0031]a. Single-piece and small-section processing. Single-piece is turned by turning. Drill the joint hole on the single-piece. The small section is leveled and closed with the bottom surface. Then drill the positioning pin hole and tighten it. First, rough open the straight groove, and then rough-mill the inside keyways and external keyways;

[0032] b. The yoke is stacked. Lift the first section of the yoke to the square box with the yoke small section lifting tool, add gaskets to level the first section of the yoke, check the level of the first section of the yoke with a frame level, and fix the first section of the yoke with a strapping plate. For the yoke section, hoist the second section yoke with the yoke small section hoisting tool, rotate the second section yoke to the same +X and +Y direction as the first section yoke, before the yoke section falls, use the yoke section betw...

Embodiment 3

[0038] A method for processing a large integral yoke ring, comprising the following steps:

[0039] a. Single-piece and small-section processing. Single-piece is turned by turning. Drill the joint hole on the single-piece. The small section is leveled and closed with the bottom surface. Then drill the positioning pin hole and tighten it. First, rough open the straight groove, and then rough-mill the inside keyways and external keyways;

[0040] b. The yoke is stacked. Lift the first section of the yoke to the square box with the yoke small section lifting tool, add gaskets to level the first section of the yoke, check the level of the first section of the yoke with a frame level, and fix the first section of the yoke with a strapping plate. For the yoke section, hoist the second section yoke with the yoke small section hoisting tool, rotate the second section yoke to the same +X and +Y direction as the first section yoke, before the yoke section falls, use the yoke section bet...

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Abstract

The invention discloses a method for machining a large integral magnet yoke ring, and belongs to the technical field of generator rotor machining. The method is characterized by comprising the following steps of a, machining a single piece and a small section; b, performing stacking of a magnet yoke; c, performing integral combining; d, performing integral hoisting; and e, performing integral milling, specifically, an inner circle key groove is indexed through an overpass milling Z axis, the inner circle key groove is indexed and led to an outer circle key groove, machining the rest parts by pressing a lower half section of a datum plane through the overpass milling Z axis, checking the verticality of an excircle plane by hanging a piano line after machining, and checking a keystroke surface by measuring the thickness of the excircle surface and the thickness of a T-tail keystroke surface through an external diameter micrometer. Whole magnet yoke machining is carried out on a numericalcontrol overpass mill, the upper half part is machined firstly and then disassembled, a workpiece is kept still, the lower half part, namely the magnet yoke is machined, the inner key groove and theouter key groove are machined at a time through the numerical control overpass mill Z axis, the inner key groove and the outer key groove are machined at a time through the whole magnet yoke, the manufacturing precision is improved, and the manufacturing period is shortened.

Description

technical field [0001] The invention relates to the technical field of generator rotor processing, in particular to a processing method for a large integral magnetic yoke. Background technique [0002] The rotor yoke of the pumped storage high-speed hydro-generator adopts a high-strength full-round thick steel plate joint structure. The overall magnetic yoke is usually about 3 meters in height and is divided into multiple sections in height. Each section is formed by combining multiple pieces with a joint screw. The inner circle has keyways for yoke keys, and the outer circle has dozens of T-tail magnetic pole keyways. The inner and outer keyways of the yoke are processed in the factory as a whole. Due to the large number of magnetic yokes and the large number of magnetic yoke segments, the processing cycle of the overall magnetic yoke is long, the assembly processing accuracy is high, and the manufacturing is difficult. How to control the machining allowance of the small s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00H02K15/02
CPCB23P15/00H02K15/02
Inventor 杨悦伟张翔冷志
Owner DONGFANG ELECTRIC MACHINERY
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