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102    2022-03-24

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ߣ϶1, ־2

ߵλ1. ѧԺеѧԺ 710123;
2. Ƽѧ繤ѧԺȴһע 710055

ؼʣ񶯵;;Ƶ;

ժҪ

񶯵гԲܼ״̬񶯵ʹͰȫԡ񶯵ȱݣڵƵסйϷͨݹǰСӻ϶ȡ϶ŵʺ϶ͨȲı仯񶯵Сʱ϶仯ģ͡ó񶯵ȱʱӨл$f_{\text{z} {\rm c}}=\left|f_{ {\rm s}} \pm m f_{ {\rm r}} \pm k f_{ {\rm c}}\right|$Ƶʣը}ͨ𡣲ý·۶ԡ񶯵йǰĵзۼһ£֤Ϸпɨԡ

Fault detection of vibration motor bearing based on current signal
MENG Dongrong1, DUAN Zhishan2
1. Department of Mechanical Engineering, Xijing University, Xian 710123, China;
2. Department of Mechanical and Electrical Engineering, Xian University of Architecture and Technology, Xian 710055, China
Abstract: The bearing of the vibration motor bears the circumferential excitation force, and its state determines the service life and safety of the vibration motor. Aiming at the single-point defect of the outer raceway of vibration motor bearings, a bearing fault diagnosis method based on current spectrum analysis is proposed. By analyzing the bearing force, according to the changes of the motor air gap length, air gap permeability and air gap flux before and after the fault, the air gap change model of the vibration motor bearing outer raceway failure was established. It is calculated that when a single-point defect occurs on the outer raceway of a vibration motor bearing, the characteristic frequency $f_{\text{z} {\rm c}}=\left|f_{ {\rm s}} \pm m f_{ {\rm r}} \pm k f_{ {\rm c}}\right|$ induced in the stator current is significantly different from that of an ordinary motor. The AC motor multi-loop theory is used to analyze the current before and after the vibration motor bearing failure, which is consistent with the theoretical calculation results, which proves that the diagnosis method is feasible.
Keywords: vibration motor;bearing;current spectrum;fault diagnosis
2022, 48(3):107-111  ո: 2020-06-17;յ޸ĸնת׶˵: 2020-10-13
Ŀ: ҿƼشר(2017ZX04011010)ѧԺл(XJ170201)
߼: ϶ݣ1990-Уˣ̣˶ʿоΪ񶯻е
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