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Maintenance method of motor frame suspension part of traction motor

A traction motor and parts technology, which is applied in the field of maintenance of the suspension parts of cast iron machine bases, can solve problems such as economic losses and scrapping of machine bases.

Active Publication Date: 2012-12-19
BOMBARDIER NUG PROPULSION SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, a considerable number of machine bases that could have been continuously used were forced to be scrapped, which would cause considerable economic losses

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The present invention will be further described below with the given examples, but not limited thereto.

[0018] A method for overhauling the suspension part of a traction motor frame, which takes the suspension part of the traction motor frame to be overhauled as the overhaul object; the steps of the overhaul are:

[0019] Step a. Clean the putty on the suspension part of the traction motor frame to be overhauled, try to avoid cleaning the paint layer under the putty surface, and scan with the eddy current detection probe. If no defect is found, go directly to step f. Carry out paint repairs on the machine base, and if defects are detected, mark the signal parts of the defects found with a marker pen; among them, the frequency of the eddy current detection probe is controlled within the range of 200KHz~1000KHz, and its center frequency is 500KHz.

[0020] Since the eddy current detection probe is used for defect scanning, it is not necessary to remove the original surf...

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PUM

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Abstract

The invention discloses a maintenance method of a motor frame suspension part of a traction motor, and the maintenance method comprises the following steps: step a. cleaning the suspension part to be maintained, scanning by an eddy current testing probe, and marking; step b. removing surface paint, detecting defects in a manner of magnetic particle inspection, and marking; step c. polishing the marked magnetic particle pattern display area, detecting defects in a manner of magnetic particle inspection, finishing polishing of the part when no magnetic particle pattern is displayed, or marking the detected magnetic particle pattern display area if a magnetic particle pattern is displayed, and continuing polishing of the magnetic particle pattern display area; step d. measuring the residual wall thickness of the polished part, wherein the actual wall thickness is not less than an allowable wall thickness; step e. when the actual wall of the polished part is measured to reach the allowable wall thickness and the magnetic particle pattern display disappears, polishing the edge of the polished part into a smooth transition state; step f. complementally painting. The maintenance method of the invention is not only reasonable, but also high in reliability and high in maintenance efficiency.

Description

technical field [0001] The invention relates to a method for overhauling the hanging part of a cast iron or cast steel machine base of a traction motor, in particular to a method for overhauling the hanging part of a cast iron machine base for a traction motor on an EMU. Background technique [0002] The traction motor is a component that converts mechanical energy and electrical energy. When in use, it is installed on the bogie of the locomotive / EMU, and connected with the wheel set through the transmission device. However, the impact and vibration (rail joints, turnouts, etc.) generated by the locomotive / EMU during operation are transmitted to the traction motor through the suspension part of the traction motor; therefore, the frame of the traction motor, especially the suspension part of the frame It must have sufficient mechanical strength to ensure the reliability of each component under working conditions. The frame and suspension parts of the existing traction motor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/90G01N27/9093
Inventor 何海军
Owner BOMBARDIER NUG PROPULSION SYST CO LTD