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Insulating property test machine for insulation bearing

A technology of insulating bearings and insulating performance, which is applied in the direction of motor generator testing, measuring devices, instruments, etc., and can solve problems such as inability to evaluate insulating bearings

Inactive Publication Date: 2008-04-30
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, the insulation performance in the state where the insulation bearings 46, 47 at both ends are combined is measured, and the measurement for each insulation bearing 46, 47 is not performed.
Therefore, no matter which method is used, it is impossible to evaluate the insulation performance of each insulating bearing 46, 47 under a real machine or an equivalent real machine state.

Method used

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  • Insulating property test machine for insulation bearing
  • Insulating property test machine for insulation bearing
  • Insulating property test machine for insulation bearing

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Embodiment Construction

[0046] Use Figure 1 to Figure 4 The first embodiment of the present invention will be described. The insulating performance testing machine of the insulating bearing of this embodiment and Figure 15 Together, it is a testing machine for evaluating the insulation performance of the insulating bearings 46 and 47 at both ends mounted on the main motor 42 of the above-mentioned railway vehicle. This insulation performance testing machine includes: a common shaft 3 for fitting the inner rings 57, 58 of the plurality of insulating bearings 46, 47; a plurality of discrete shields 11, 12; a common base 4 on which these discrete shields 11, 12 are provided; and a plurality of insulation resistance measuring parts 1, 2 corresponding to the respective insulating bearings 46, 47.

[0047] The pedestal 4 includes: a bracket 5; a pair of front and rear cylinders 6, 6 vertically arranged on the bracket 5; The separate shields 11, 12 are arranged inside the columns 6, 6 on both sides. I...

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Abstract

This testing machine comprises a common shaft for interfitting inner rings of a plurality of insulated bearings, a plurality of respective housings for interfitting respectively outer rings of each insulated bearing, and a common base for installing thereon the respective housings. Insulators are interposed between each of the respective housings and the base. In the testing machine, insulation resistance measuring means are provided respectively to each insulated bearing, and the insulation resistance between a part on the furthermore inner diameter side than the insulation part on the insulated bearings and the respective housings corresponding to the insulated bearings is measured.

Description

technical field [0001] The present invention relates to an insulation performance testing machine used for insulating bearings in main motors of railway vehicles and the like. Background technique [0002] In railway vehicles, bearings are used in various parts such as the main motor of the trolley, the drive unit, and the axle. In recent years, with the advancement of railway technology, VVVF (variable voltage-variable frequency control method) is also adopted in the above-mentioned main motor, whereby electric corrosion often occurs in bearings used for the main motor. If electrical corrosion occurs in the bearing, the running surface of the bearing will be damaged, abnormal noise will be generated, and peeling will occur. In order to prevent these phenomena, an insulating bearing is required. In order to meet such needs, insulated bearings are being developed in which ceramics are used as insulators for the rotating body, and an insulating film made of ceramics and PPS r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/02G01R31/34
Inventor 近藤博光伊藤广信
Owner NTN CORP