Sealing ring for gyratory crusher

A gyratory crusher sealing ring assembly for a gyratory crusher having a crushing chamber defined between an outer and an inner crushing shell with a discharge zone to allow crushed material at the crushing chamber, the inner crushing shell being supported on a head mounted at a main shaft wherein a working part zone is positioned below the head and about the shaft and including working parts to enable the head to move gyroscopically within the crusher, the sealing ring assembly configured for positioning between the discharge zone and the working part zone and comprising:

• an annular body having a first part arranged to mate against with a sealing surface provided at an underside region of the head and a second part for mounting the body at a support part disposed substantially axially below the head, the annular body having a Young's modulus (E-modulus) in the range 1700 to 4300 MPa and being substantially rigid so as to not flex or bend in response to the oscillating movement of the head and in sliding contact between the first part and the sealing surface;
• and
• a bias component or region positioned at the annular body to apply an axial return force to urge the first part of the body into contact with the sealing surface.