Patent ID: 9199244
Filing Date: 2015-12-01
Classification: B02C

Abstract:
1. A method for at least partly emptying a crushing chamber formed between an inner crushing shell and an outer crushing shell of an inertia cone crusher, the inner crushing shell being supported on a crushing head, said crushing head being rotatably connected to an unbalance bushing which is rotated by a drive shaft, said unbalance bushing being provided with an unbalance weight for tilting the unbalance bushing, such that a central axis of the crushing head will gyrate about a gyration axis with a rpm, crushing material in the crushing chamber, the method comprising the steps of: interrupting feeding of material to the crusher; measuring, directly or indirectly, at least one of a position and a motion of the crushing head during an amplitude control period; comparing the measured position and/or motion to at least one set point value; determining, based on said comparing the measured position and/or motion to at least one set point value, whether said rpm should be adjusted; and adjusting, when determined necessary, said rpm.