Vibration of Rotor Based on Ball Bearing : 1st Report, Static Stiffness of Ball Bearing

概要

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That a ball bearing forming a link of an oscillatory system presents a strange and complicated character, when seen as one of the springs, is quite probable from its mechanism, and some of its features have been already pointed out. The first step in the investigation of the vibration of the rotor supported on ball bearings is to know its spring property in detail, but there are few papers that have pursued that question sufficiently. Here is reported an analysis which is simple but effective for inspecting the character of spring due to Hertz contact of elements in the bearing. It proposes a simple method of estimation with some considerations on the effects of production and assembling accuracy, which were given little consideration as spring theory and an actual calculation on the case containing only two balls which is a simple but important model with which to penetrate the essential feature of this mechanism. The authors believe that this theory gives a key to the causes of vibration especially in the direction of revolving axis, which is a curious trouble among the rotors constructed comparatively rigid e.g. an induction motor.
一般社団法人日本機械学会の論文