Application Of Spectrum Analysis Technology In Inspections Of Elevator Bearings

Rolling bearings are commonly used in rotating machines and are widely used in elevators,and their quality and performance have an important impact on the safety and comfort of elevators.Therefore,in-depth study of the state inspection and fault diagnosis of elevator bearings has important academic significance and engineering application value for the safe use of elevators.On the basis of knowing the characteristic frequency of the elevator bearing,it is a convenient and feasible method to diagnose the elevator bearing by using the spectrum analysis technology.This thesis,funded by the project “spectrum analysis technology in the elevator bearing detection application”(Project's Serial Number: HZSEI-JD-2016-02)supported by the Guangdong Provincial Special Equipment Testing and Research Institute Huizhou Testing Institute.Based on the history and research status of the rolling bearing fault diagnosis,the frequency characteristics of the life cycle of the elevator bearing and the fault characteristic frequency of the parts of the elevator bearing are studied in detail from the failure characteristic frequency of the elevator bearing.And a set of elevator bearing fault diagnosis system was developed from testing work experience.The main work of this paper is as follows:(1)The frequency characteristics of running at each stage are not the same,which is elaborated in details through a set of experiments in this paper.Through the extensive collection of common bearing data of the elevator,the fault characteristic frequency of each component of the elevator bearing is calculated by combining the theoretical formula and the empirical formula,and the frequency is normalized.Finally,the characteristic database of the elevator bearing fault characteristic is established.(2)The elevator bearing failure will lead to the vertical vibration of the elevator car,thereby affecting the comfort of the use of the elevator.This paper analyzes the application of spectrum analysis technology in elevator bearing inspection through a test case.(3)Based on the establishment of the frequency database of the elevator bearing failure,a set of elevator bearing fault diagnosis system was developed based on the spectrum analysis technology.This paper has carried on the academic research on the basis of the engineering practice,and the achievement will also be used in the engineering practice,and promote the development of the elevator detection technology.