Assembly and method for restricting spinning in a gyratory crusher
AssigneeSandvik Intellectual Property AB
InventorsBengt-Arne Eriksson, Johan Gunnarsson
Life of this patent
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Abstract
A crusher system includes a gyratory crusher, which has a crushing head, on which a first crushing shell is mounted; a frame, on which a second crushing shell is mounted; and a driving device, which is arranged to cause, by means of a rotating eccentric, the crushing head to execute a gyratory movement for crushing material. The crusher system includes a device for generating a signal that indicates the current tendency of the crushing head to spin; a device arranged to establish, based on the signal, a maximum allowable rotational speed for the eccentric; and a device arranged to adapt the rotational speed of the eccentric to a rotational speed that is lower than the maximum allowable rotational speed.
Claims10
A method of restricting spinning in a gyratory crusher, which comprises a crushing head on which a first crushing shell is mounted;
- a frame on which a second crushing shell is mounted, which second crushing shell defines together with the first crushing shell a crushing gap;
- and a driving device, which is arranged to cause, by means of a rotating eccentric, the crushing head to execute a gyratory movement with a view to crushing material that is introduced in the crushing gap, the method comprising the steps of:
- a) reading a signal that indicates the current tendency of the crushing head to spin;
- b) establishing, based on the signal, a maximum allowable rotational speed for the eccentric;
- and
- c) adapting a rotational speed of the eccentric to a rotational speed that is lower than said maximum allowable rotational speed.
A crusher system comprising a gyratory crusher, which has a crushing head, on which a first crushing shell is mounted;
- a frame, on which a second crushing shell is mounted, which second crushing shell defines together with the first crushing shell a crushing gap;
- and a driving device, which is arranged to cause, by means of a rotating eccentric, the crushing head to execute a gyratory movement for crushing material that is introduced in the crushing gap, wherein the crusher system comprises:
- a means for generating a signal that indicates a current tendency of the crushing head to spin;
- a means arranged to establish, based on the signal, a maximum allowable rotational speed for the eccentric;
- and
- a means arranged to adapt a rotational speed of the eccentric to a rotational speed that is lower than said maximum allowable rotational speed.
Dependencies are inferred from the claim text.