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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2022, Vol. 43 ›› Issue (8): 625481.doi: 10.7527/S1000-6893.2021.25481

• Special Topic: Application of Fault Diagnosis Technology in Aerospace Field • Previous Articles     Next Articles

Crack location recognition method for full ceramic bearing outer ring

SHI Huaitao1, LIU Zimeng1,2, BAI Xiaotian1, MA Hui2   

  1. 1. School of Mechanical Engineering, Shenyang Jianzhu University, Shenyang 110168, China;
    2. School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China
  • Received:2021-03-12 Revised:2021-09-07 Online:2022-08-15 Published:2021-08-25
  • Supported by:
    National Natural Science Foundation of China (52075348,51705341,51905357)

Abstract: Full ceramic bearings have excellent performance such as high precision and high load-carrying capacity, which have important application prospects in aero-engine. Therefore, how to obtain the real-time running state of full ceramic bearings is an important problem to ensure their service performance. In this research, based on the attenuation of fault vibration signal along the outer ring, a method to recognize the crack location of the outer ring of full ceramic bearing is proposed. Aiming at the problem of recognizing the early crack position of the outer ring of full ceramic bearing, and considering the load of the outer ring of full ceramic bearing in the process of operation, the mechanism of the outer ring crack is analyzed, meanwhile, the dynamic model of full ceramic bearing including the outer ring crack fault is established. Based on the transmission attenuation matrix of fault vibration signal along the outer ring, the judgment model of outer ring fault location is established, the functional relationship between the synchronous root mean square difference of simulated vibration signal at different positions on the outer ring and the outer ring crack location angle is derived, and the crack location identification method of ceramic ball bearing outer ring is obtained. The comparison of simulation and experimental data shows that there is a certain degree of functional relationship between the synchronous root mean square difference of two fault vibration signals at different positions on the outer ring of full ceramic bearing and the position of outer ring crack. The accuracy of the method is 3.6°. The method can recognize the crack position of the outer ring of full ceramic bearing, which provides a theoretical basis for fault diagnosis and health monitoring of full ceramic bearing.

Key words: full ceramic bearing, outer ring crack, position recognition, synchronous root mean square difference, health monitoring

CLC Number: