GEA innovation puts an end to the stick-slip effect:Active torque control for decanter centrifuges increases economic efficiency

摘要

Creaking doors, squeaking brakes, orstuttering pneumatic cylinders anddiscontinuously running carriages on machine tools - consequences of a phenomenon that is generally unwanted in everyday life as well as in industrial applications: the stick-slip effect.This detrimental effect can occur when the static friction between the solid bodies moving against each other is greater than the dynamic friction. If the slipping speed of the solid body becomes too slow, it gets stuck and needs additional energy to start slipping again.This resembles irregular chattering: sticking -releasing - slipping - braking - sticking -releasing - slipping and so on.