A motor shaft assembly

A main shaft and assembly technology, applied in the field of outer rotor motors, can solve the problems of scrapping the whole machine, friction heating between the roller stator and the rotor, and no bearing cover detection, so as to achieve the effect of protecting the motor.

Active Publication Date: 2020-08-04
JIANGSU JIAXUAN INTELLIGENT IND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the eccentricity is too large, the friction between the roller stator and the rotor will heat up, and the whole machine will be scrapped.
At present, the external rotor motors in the prior art do not detect the eccentricity of the bearing cover, and it is often discovered when wear or shutdown has occurred

Method used

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Embodiment Construction

[0024] Specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although specific embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and is not limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0025] It should be noted that certain terms are used in the specification and claims to refer to specific components. Those skilled in the art should understand that they may use different terms to refer to the same component. The specification and claims do not use differences in nouns as a way of distinguishing components, but use differences in functions of components as a criterion for distinguishing. "Includes" or "comprises" mentioned throughout the spe...

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PUM

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Abstract

The invention belongs to the technical field of outer rotor motors, and relates to a method for detecting eccentricity of a bearing cover of an outer rotor motor and a motor main shaft assembly. The detection method includes step 1: a plurality of proximity sensors are arranged on each inner bearing cap; step 2: each proximity sensor measures the distance from the inner wall of the inner bearing cap to the shaft; step 3: the distance measured by the plurality of proximity sensors is compared with the Comparing the gap standard value with the obtained deviation value, calculating the maximum deviation value, the minimum deviation value and the deviation angle; Step 4: comparing whether the maximum deviation value and the minimum deviation value exceed the critical value. The method of the invention can dynamically detect the eccentricity of the bearing cover according to the movement of the inner bearing cover, so as to ensure explosion-proof safety, and when the eccentricity exceeds a critical value, it can alarm and remind the bearing to maintain in time to protect the motor.

Description

technical field [0001] The invention relates to the technical field of outer rotor motors, in particular to a motor shaft assembly. Background technique [0002] The outer rotor motor is often used to drive the transmission roller in the industrial and mining industry. The main shaft of the permanent magnet direct drive outer rotor motor is fixed, and the inner bearing cover and the end cover rotate around the shaft. There is a gap between the inner bearing cover and the shaft. The function of this gap is to prevent friction between the inner bearing cover and the shaft, and it is also an explosion-proof gap. According to the requirements of explosion-proof standards, this gap cannot be greater than 0.7 mm, if it is greater than 0.7 mm, there is a risk of detonation; the gap cannot be less than 0.05 mm, and if it is less than 0.05 mm, there is a risk of contact friction. Once the inner bearing cover is in contact with the shaft, both the end cover and the shaft will be stra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/24G01B7/312H02K5/16
CPCG01B7/312G01B21/24H02K5/16
Inventor 张春晖
Owner JIANGSU JIAXUAN INTELLIGENT IND TECH CO LTD
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