Press mounting method for generator stator core stretching screw

A generator stator and tightening screw technology, which is applied in the manufacture of stator/rotor body, etc., can solve the problems of failure to consider frictional resistance, tightening the screw to reach the stretching amount, and not ensuring the pressure between the core pieces, etc. Achieve the effects of good press-fitting effect, accurate and reliable data, and convenient operation

Active Publication Date: 2012-11-28
TIANJIN TIRNFR HEAVY HYDROELECTRIC FRCILITY CO LTD
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AI Technical Summary

Problems solved by technology

[0002] At present, the pressure value that needs to be applied in the press-fit process is calculated according to the force value of each tension screw provided by the design during the press-fit process of the stator core, but in the actual press-fit process, the parameters of hydraulic tensioners from different manufacturers Different, and this parameter value is the test value under ideal conditions, it does not take into account the external friction resistance in the actual working process, so according to the calculated pressure value, the tightening screw will inevitably fail to meet the design requirements The amount of stretching, resulting in technical problems such as poor guarantee of the pressure between the core pieces

Method used

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  • Press mounting method for generator stator core stretching screw
  • Press mounting method for generator stator core stretching screw
  • Press mounting method for generator stator core stretching screw

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Embodiment 1

[0024] A generator stator core tensioning screw press-fitting method, the generator stator core punching pieces are press-fitted together by a tensioning screw, and the press-fitting process steps are:

[0025] 1. Tension screw pressure test installation: measure the actual length of the tension screw without pressurization, and then use the tension screw measuring sleeve to perform pre-compression and total pressure test on the tension screw. The elongation of the stretching screw, when the elongation reaches the pre-compression value, record the pressure value of the hydraulic tensioner as the pressure reference value of the official pre-compression and total pressure;

[0026] 2. Tension measurement and press-fitting of the tension screw: First, use the tension screw measuring tool to measure the original distance between the lower end surface of the tension screw and the upper plane of the lower measurement rib, keep and fix the relative position of the upper and lower meas...

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Abstract

The invention relates to a press mounting method for a generator stator core stretching screw. The invention belongs to the technical field of hydraulic generators. The generator stator core laminations are pressed together by a stretching screw. The method comprises the following steps: (1) test press mounting of stretching screw: measuring the actual length of the stretching screw without pressurizing, carrying out test press on the stretching screw by using a stretching screw measuring sleeve, measuring the elongation of the stretching screw while pressurizing, and recording the pressure reference value; and (2) stretching quantity measurement and press mounting of stretching screw: measuring the initial distance between the lower end surface of the stretching screw and the upper planeof the lower measuring rib by using a stretching screw measuring tool, recording while prepressing and totally pressing, measuring the distance between the lower end surface of the stretching screw and the upper plane of the lower measuring rib when pressurizing to the pressure reference value, and measuring while pressurizing until the requirement is satisfied, thereby realizing press mounting. The invention has the advantages of simple technique, convenient operation, accurate and reliable data, favorable core press mounting effect and the like.

Description

technical field [0001] The invention belongs to the technical field of hydroelectric generators, and in particular relates to a press-fitting method for a generator stator iron core tightening screw. Background technique [0002] At present, the pressure value that needs to be applied in the press-fit process is calculated according to the force value of each tension screw provided by the design during the press-fit process of the stator core, but in the actual press-fit process, the parameters of hydraulic tensioners from different manufacturers Different, and this parameter value is the test value under ideal conditions, it does not take into account the external friction resistance in the actual working process, so according to the calculated pressure value, the tightening screw will inevitably fail to meet the design requirements The amount of stretching will cause technical problems such as not being able to ensure the pressure between the core pieces. Contents of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K15/02
Inventor 赵作勤李卫红张俊新陆鑫
Owner TIANJIN TIRNFR HEAVY HYDROELECTRIC FRCILITY CO LTD
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