Dust sealing

An arrangement for dust blocking in a cone crusher that comprises:

• a crusher head comprising a support cone;
• a linear actuator for vertically moving the crusher head for setting adjustment and/or tramp iron release;
• the support cone comprising a lower surface that at least in part defines a downwards opening annular cavity;
• and a seal ring that is radially movably supported by the crusher head, and that forms a lip for the annular cavity;
• the arrangement comprising:
• a slip ring configured to extend into the annular cavity beyond the seal ring and forming a counter-surface for the seal ring;
• wherein the slip ring at least in part defines:
• a pressurised gas supply channel;
• and
• an entry channelling;
• and wherein the entry channelling interconnects the pressurised gas supply channel to the annular cavity for allowing a perimetrically distributed entry of pressurised gas into the annular cavity;
• and
• wherein the pressurised gas supply channel comprises a cover configured to be attached onto a surface of the slip ring.

A method for blocking entry of dust into a cone crusher, comprising:

• supporting a crusher head by a support cone;
• vertically moving, by a linear actuator, the crusher head for setting adjustment and/or tramp iron release;
• defining, at least in part by a lower surface of the support cone, a downwards opening annular cavity;
• radially movably supporting, by the crusher head, a seal ring;
• and
• forming a lip for the annular cavity by the seal ring;
• using a slip ring that extends into the annular cavity beyond the seal ring as a counter-surface for the seal ring;
• defining, at least in part by the slip ring:
• a pressurised gas supply channel;
• and
• an entry channelling;
• and interconnecting, by the entry channelling, the pressurised gas supply channel to the annular cavity for allowing a perimetrically distributed entry of pressurised gas into the annular cavity;
• and
• wherein the pressurised gas supply channel comprises a cover configured to be attached onto a surface of the slip ring.

A method for manufacturing a cone crusher, comprising:

• providing a crusher head comprising a support cone;
• and
• providing a linear actuator for vertically moving the crusher head for setting adjustment and/or tramp iron release;
• providing a downwards opening annular cavity in a lower surface of the support cone;
• providing a seal ring that is radially movably supported by the crusher head, and that forms a lip for the annular cavity;
• providing a slip ring extending into the annular cavity beyond the seal ring and forming a counter-surface for the seal ring;
• defining, at least in part by the slip ring:
• a pressurised gas supply channel;
• and
• an entry channelling;
• and interconnecting, by the entry channelling, the pressurised gas supply channel to the annular cavity for allowing a perimetrically distributed entry of pressurised gas into the annular cavity;
• and
• wherein the pressurised gas supply channel comprises a cover configured to be attached onto a surface of the slip ring.