Design of servo motor bearing accelerated life test device considering shaft current damage

doi:10.3785/j.issn.1006-754X.2025.05.102

Chinese Journal of Engineering Design

2025, Vol. 32

Issue (4): 562-568 DOI: 10.3785/j.issn.1006-754X.2025.05.102

Mechanical parts and equipment design

Design of servo motor bearing accelerated life test device considering shaft current damage

Jia WANG^1,²(

),Qingqiang CHEN^1,³,Zixian ZHANG^1,²,Yizhuo ZHAO^1,²,Luyu ZHANG^1,²(

)

^1.State Key Laboratory of Intelligent Power Distribution Equipment and System, Hebei University of Technology, Tianjin 300401, China
^2.School of Electrical Engineering, Hebei University of Technology, Tianjin 300401, China
^3.School of Mechanical Engineering, Hebei University of Technology, Tianjin 300401, China

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Abstract

Aiming at the problem that the current bearing accelerated life test device is difficult to accurately restore the influence of factors such as shaft current damage, friction and wear on servo motor bearings under service conditions, a servo motor bearing accelerated life test device considering shaft current damage is designed. This test device could simulate the performance degradation process of servo motor bearings under the influence of factors such as shaft current damage, friction and wear, while collecting and analyzing relevant monitoring data in real time to realize visual characterization of the performance degradation process of servo motor bearings. The analysis test of bearing damage caused by shaft current and the bearing accelerated life test based on service conditions were carried out by using the test device. The results show that the designed test device has the function of accurately simulating the service conditions of servo motor bearings, which can provide equipment support and test conditions for the reliability research of such bearings.

Key words： accelerated life test device shaft current damage bearing performance degradation

Received: 08 January 2025 Published: 01 September 2025

CLC:

TH 39

Corresponding Authors: Luyu ZHANG E-mail: jwangno1@163.com;lyzhang2011@hebut.edu.cn

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Cite this article:

Jia WANG,Qingqiang CHEN,Zixian ZHANG,Yizhuo ZHAO,Luyu ZHANG. Design of servo motor bearing accelerated life test device considering shaft current damage. Chinese Journal of Engineering Design, 2025, 32(4): 562-568.

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https://www.zjujournals.com/gcsjxb/10.3785/j.issn.1006-754X.2025.05.102 OR https://www.zjujournals.com/gcsjxb/Y2025/V32/I4/562

考虑轴电流损伤的伺服电机轴承加速寿命试验装置设计

针对当前轴承加速寿命试验装置难以准确还原伺服电机轴承在服役工况下受轴电流损伤、摩擦磨损等因素影响的问题，设计了一种考虑轴电流损伤的伺服电机轴承加速寿命试验装置。该试验装置可以模拟伺服电机轴承在轴电流损伤、摩擦磨损等因素影响下的性能退化过程，同时实时采集并分析相关监测数据，实现对伺服电机轴承性能退化过程的可视化表征。利用该试验装置开展轴电流对轴承的损伤分析试验和基于服役工况的轴承加速寿命试验。结果表明，所设计的试验装置具备准确模拟伺服电机轴承服役工况的功能，可为该类轴承的可靠性研究提供设备支撑与试验条件。

关键词： 加速寿命试验装置, 轴电流损伤, 轴承, 性能退化

Fig.1 Servo motor bearing accelerated life test device

Fig.2 Structure composition of bearing current testing device

Fig.3 Operation principle of control module

Table 1 Parameters of NSK6007ZZ rolling bearing

Fig.4 Generation principle of common mode voltage

Fig.5 Transmission path of EDM shaft current

Fig.6 Damage of bearing inner raceway caused by shaft current

Fig.7 Shaft voltage data at different rotational speeds

Fig.8 Visual characterization result of bearing performance degration proces

Fig.9 Test bearing

Fig.10 Time-domain diagram of original vibration signal of bearing

Fig.11 Frequency domain diagram of original vibration signal of bearing


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