Diagnostics of elements freewheel
Keywords:
vibration diagnostics, hole wear, clutch, evaluation of defects on noiseAbstract
The article presents the results of theoretical research, which was conducted in the framework of finding solutions task analytical diagnosis of the errors of geometry of the freewheel mechanisms. The solution to this problem enhancing the accuracy and reliability of the assessment of the clutches and provides the increase of reliability of operation and operating mechanisms in General. The authors have developed a new diagnostic method for accurate assessment of the quality of the surface of the rotating cage or hub and rollers. The essence of the method lies in the fact that the assessment of elements of parts of freewheels is made by analyzing the level of noise that is the result of the manifestation of such sources, as defects, are available on the surfaces of these elements. For the detection and classification of defects check emerging bursts recorded at fixed points in time and which can be calculated using the coordinates of location of defects, construction of the hub and the frequency of its rotation. The proposed new technique has been used to assess the condition of parts as one-way mechanisms of metal-cutting machines and roller locks for technological devices. The degree of accuracy produced by the rejection of parts made from 83 % to 89 %. The advantages of the proposed method are the following provisions: 1) the controller is able to determine the total number of defects with a high degree of accuracy; 2) reduced time to assess the wear and deviations of the geometry of the parts of the freewheel mechanisms; 3) accuracy of evaluation of surface quality can be checked by comparison with results of measurements carried out using certified equipment.
Present article is one of the first works on vibration diagnostics of the freewheel mechanisms. In the article the phenomenological formula for calculating the dimensions of the defects on the parts overrunning roller freewheel mechanisms.
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