Stick-Slip Friction as a Cause of Torsional Vibration in Textile Drafting Rollers

Abstract

Torsional vibration of long rollers stimulated by stick-slip frictional behaviour constitutes a problem in the drafting of fibrous textile materials. A study of the behaviour of long rollers, including the measurement of the periods of stick and slip during vibration is described. With the object of finding a combination incapable of maintaining stick-slip vibrations the detailed frictional behaviour of a number of bearing materials and lubricants was investigated and a laboratory instrument was made to simulate service conditions and indicate the liability to stick-slip vibration of single bearings. Good correlation was observed between the liability to vibration of single bearings in the tester and the performance of multiple bearing assemblies in service. No completely satisfactory solution has been found, although many combinations have been tried.