Motor insulating bearing device and manufacturing method thereof

A technology of insulated bearings and motor bearings, applied in the direction of electromechanical devices, casings/covers/supports, electrical components, etc., can solve problems such as bearing electric corrosion, equipment failure, rotor bore sweeping, etc., to ensure reliable operation and avoid electric shocks Corrosion damage, prolonging the service life effect

Inactive Publication Date: 2010-04-07
WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This axial current and the heat generated inside the motor constitute the main factors for the reactive power loss of electric energy. More importantly, it will cause electric corrosion of the bearing, causing premature damage to the bearing, and problems such as motor shaft holding and rotor sweeping occur, which in turn cause serious equipment failure
So far, this problem has not been solved satisfactorily

Method used

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  • Motor insulating bearing device and manufacturing method thereof
  • Motor insulating bearing device and manufacturing method thereof
  • Motor insulating bearing device and manufacturing method thereof

Examples

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Embodiment Construction

[0021] see figure 1 , the motor insulated bearing device of the present invention is made up of bearing block 1, motor bearing 3, bearing outer cover 6, bearing inner cover 4, insulating bushing 2 and insulating spacer 5, wherein, motor bearing 3 can adopt radial rolling bearing , the inner ring of the bearing is tightly connected with the motor main shaft 8 and rotates together, and the outer ring of the bearing is connected with the bearing seat 1 in a set. The insulating bushing 2 is located between the outer ring of the motor bearing and the inner hole of the bearing seat 1 , and is used for current isolation between the motor bearing 3 and the bearing seat 1 . The insulating bushing 2 includes an inner bushing 2-2 and an insulating layer 2-1 arranged on the outer circumference of the inner bushing 2-2, and the inner bushing 2-2 is made of metal for supporting the insulating layer 2-1 , the insulating layer 2-1 is made of insulating latitude-free tape. In order to make th...

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PUM

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Abstract

The invention relates to a motor insulating bearing device and a manufacturing method thereof. The bearing device is characterized in that an insulating bushing is positioned at a circumference part between a bearing pedestal and a motor bearing, insulating space rings are arranged between the end of the insulating bushing and the motor bearing and an outer bearing cover and between the end thereof and an inner bearing cover, and a gap is left between the insulating space ring and the insulating bushing. The motor insulating bearing device is manufactured by a unique method, the formation of rotor axial current loop is prevented effectively and the electric corrosion damage of the motor bearing is avoided, thereby ensuring the reliable operation of the motor, prolonging the service life of the motor and decreasing the reactive power loss of the electric energy at the same time; the motor insulating bearing device has the advantages of reasonable structure design, reliable operational performance and convenient installation and maintenance, etc.

Description

technical field [0001] The invention belongs to the technical field of motor accessories, and relates to a motor insulating bearing device and a manufacturing method thereof. Background technique [0002] In the prior art, the motors are generally connected and assembled by conductive metal components. Due to the design and manufacture of the motors, during the operation of large and medium-sized motors, a relatively high shaft voltage is generated on the rotor, and through mutual The connected motor shaft, bearings, endshield and frame form a loop current. Especially for variable frequency motors or motors powered by frequency converters, high shaft voltages are often generated on the rotor. This axial current and the heat generated inside the motor constitute the main factors for the reactive power loss of electric energy. More importantly, it will cause electric corrosion of the bearing, causing premature damage to the bearing, and problems such as motor shaft holding an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K5/16
Inventor 张运生陈建军靳芝邢印霍华峰李幸运温培艳
Owner WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GRP CO LTD
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