Fretting wear reduction of interference fitted cone crusher head
AssigneeMetso Finland Oy
InventorsMikko Merikoski, Petri Kujansuu
Life of this patent
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Abstract
A cone crusher head, system, and crusher including the cone crusher head and system. A conical mantle radially extends from an interference fit section and has a head diameter Dch. The conical mantle has a wear part support surface and a shaft support surface. The interference fit section has a nominal interference fit diameter Dif. The conical mantle has an armpit groove for receiving a slip ring. The armpit groove is covered by the conical mantle with an armpit thickness La. Fretting wear is reduced by dimensioning the crusher head so that a ratio of the head diameter Dch to the nominal interference fit diameter Dif is most 2.5; and a ratio of the head diameter Dch to the armpit thickness La is at least 10.5.
Claims20
A crusher head of a cone crusher, comprising:
- a conical mantle radially extending from an interference fit section, comprising a wear part support surface and a shaft support surface;
- the shaft support surface comprising the interference fit section for supporting the crusher head to a main shaft;
- the interference fit section having a nominal interference fit diameter Dif;
- the conical mantle comprising an armpit groove for receiving a slip ring;
- the armpit groove being covered by the conical mantle with an armpit thickness La that is a minimum distance between a wear part support surface and the armpit;
- and
- the conical mantle having a head diameter Dch that is a maximum diameter of the crusher head;
- wherein fretting wear is reduced by dimensioning of the crusher head for minimising deformations at the interference fit section by:
- a ratio of the head diameter Dch to the nominal interference fit diameter Dif being at most 2.5;
- and
- a ratio of the head diameter Dch to the armpit thickness La being at least 10.5.
Dependencies are inferred from the claim text.