Research of stability of rotor of the knife grinding refiners

Abstract

An object of research is stability of provision of rotor in the knife grinding refiners. Dynamic and mathematical models of rotor in bearing support are developed. Expression for determination of force of a preliminary tightness in bearing support for stabilization of the situation of rotor is received. Amplitude of fluctuations of disk of rotor in bearings with tightness is much less than in bearings with gap. For ensuring stability of an interknife gap of refiners it is recommended to eliminate radial gaps in bearing knots, i.e. to use bearings with a preliminary tightness. It will allow to raise a technical resource of the grinding plate. The technique of researches can be applied in other high-precisionmachines, for example, in the metalworking equipment. © 2020 IOP Publishing Ltd. All rights reserved.