Sealed crusher

A gyratory crusher having

• a frame;
• an eccentric shaft rotatable around a vertical axis in the frame, with a vertical inclined hole therein;
• a main shaft supported by bearings in the hole of the eccentric shaft, said main shaft comprising an upper end extending above the eccentric shaft, and a supporting cone attached and supported thereto, and
• arranged around the main shaft, below the supporting cone, a sealing cover covering the eccentric shaft, said sealing cover having an inner edge, and an outer edge fastened tightly to the frame,
• whereby the sealing cover is sealed against the main shaft with a sealing member so that contact surfaces between the sealing cover and the sealing member are formed in an annular groove and a part fitted in the groove, said groove having the shape of the part fitted in the groove, but being sideways wider than the portion of said part fitted in said groove,
• wherein the contact surfaces of both said groove and the part fitted in said groove are inclined in such a way that radially outer edges of said groove and the part are higher than radially inner edges of said groove and the part.