Fretting wear reduction in interference fit of cone crusher head
AssigneeMetso Finland Oy
InventorsPetri Kujansuu, Mikko Merikoski
Life of this patent
Estimating the term…
Abstract
A system, cone crusher and its main shaft that includes an interference fit section for supporting a crusher head. The interference fit section has a nominal interference fit diameter Dif; a bottom shaft section extending between a bottom end of the main shaft and the interference fit section, and having a bottom part and a neck part. The bottom part has a bottom part length Lbp and a bottom part diameter Dbp that is constant below the neck part on at least 50% of the bottom part length Lbp. The neck part has a neck part diameter growing towards the interference fit section. The main shaft has a main shaft length Lms. Lms1.3/Dif is at most 40 mm1.3. Dbp1.421/Dif is at most 9.0 mm0.421.
Claims17
A main shaft of a cone crusher, comprising:
- an interference fit section for supporting a crusher head, the interference fit section having a nominal interference fit diameter Dif;
- a bottom shaft section extending between a bottom end of the main shaft and the interference fit section;
- the bottom shaft section comprising a bottom part and a neck part;
- wherein the bottom part has a bottom part length Lbp and a bottom part diameter Dbp that is constant below the neck part on at least 50% of the bottom part length Lbp;
- the neck part has a neck part diameter that is growing towards the interference fit section;
- the main shaft has a main shaft length Lms;
- wherein for reducing fretting wear in the interference fit section,
- Lms1.3/Dif is at most 40 mm0.3;
- and
- Dbp1.421/Dif is at most 9.0 mm0.421.
A system comprising:
- a main shaft comprising:
- an interference fit section for supporting a crusher head, the interference fit section having a nominal interference fit diameter Dif;
- a bottom shaft section extending between a bottom end of the main shaft and the interference fit section;
- the bottom shaft section comprising a bottom part and a neck part;
- wherein the bottom part has a bottom part length Lbp and a bottom part diameter Dbp that is constant below the neck part on at least 50% of the bottom part length Lbp;
- the neck part has a neck part diameter that is growing towards the interference fit section;
- the main shaft has a main shaft length Lms;
- wherein for reducing fretting wear in the interference fit section,
- Lms1.3/Dif is at most 40 mm0.3;
- and
- Dbp1.421/Dif is at most 9.0 mm0.421;
- and
- a cone crusher head configured for interference fit attaching to the interference fit section of the main shaft.
A cone crusher comprising:
- a main shaft, the main shaft comprising:
- an interference fit section for supporting a crusher head, the interference fit section having a nominal interference fit diameter Dif;
- a bottom shaft section extending between a bottom end of the main shaft and the interference fit section;
- the bottom shaft section comprising a bottom part and a neck part;
- wherein the bottom part has a bottom part length Lbp and a bottom part diameter Dbp that is constant below the neck part on at least 50% of the bottom part length Lbp;
- the neck part has a neck part diameter that is growing towards the interference fit section;
- the main shaft has a main shaft length Lms;
- wherein for reducing fretting wear in the interference fit section,
- Lms1.3/Dif is at most 40 mm0.3;
- and
- Dbp1.421/Dif is at most 9.0 mm0.421;
- and
- a cone crusher head configured for interference fit attaching to the interference fit section of the main shaft.
Dependencies are inferred from the claim text.