Gyratory crusher crushing head

Patent metadata

Field	Value
Publication number	US-10173221-B2
Application number	US-201314390146-A
Country	US
Kind code	B2
Filing date	Mar 19, 2013
Priority date	Apr 3, 2012
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

A gyratory crusher crushing head, removably mounted a crushing shell, includes a circumferential groove is formed in an outer facing surface of the crushing head. The groove is positioned towards a second lower end at the outward facing surface relative to an axial length of the crushing head. The groove and its relative axial positioning minimizes the stress concentrations at the crushing head resulting from forces tangential to the outward facing surface.

First claim

The invention claimed is:

1. A gyratory crusher crushing head comprising:
a first end for positioning at an upper region in a gyratory crusher and a second end for positioning at a lower region of the crusher;
a substantially frustoconical section extending between the first and second ends;
a first cylindrical section extending between the first end and the frustoconical section, a junction between the first cylindrical section and the frustoconical section being seamless;
a surface extending between the first and second ends, the surface being outward facing relative to a longitudinal axis bisecting the crushing head;
a second cylindrical section positioned between the second end and the frustoconical section; and
a groove positioned in the second cylindrical section and formed in the outward facing surface in an axial direction towards the second end, the groove extending in a circumferential direction relative to the longitudinal axis of the crushing head, wherein the groove is an endless groove formed as a channel having a substantially rectangular or square cross-sectional profile, wherein the channel is defined by a pair of parallel sidewalls aligned perpendicular to the longitudinal axis, the parallel sidewalls each being terminated at a radially innermost end by a bottom wall, the bottom wall being parallel to the longitudinal axis and having an axial length substantially equal to an opening of the groove at the outward facing surface.

2. The crushing head as claimed in claim 1 , wherein the second cylindrical section has an axial length in the range 10 to 20% of a total axial length of the crushing head.

3. The crushing head as claimed in claim 1 , wherein the groove is aligned so as to extend from the outward facing surface in a direction substantially perpendicular to the longitudinal axis.

4. The crushing head as claimed in claim 1 , wherein the groove is positioned in one half of the crushing head in an axial direction closest to the second end.

5. The crushing head as claimed in claim 1 , wherein the groove is positioned at a distance 2 to 25% from the second end in an axial direction relative to a distance between the first and second ends.

6. The crushing head as claimed in claim 1 , wherein the groove is positioned at a distance 5 to 15% from the second end in an axial direction relative to a distance between the first and second ends.

7. The crushing head as claimed in claim 1 , wherein the groove is positioned towards the second end in an axial direction.

8. A gyratory crusher including a crushing head, the crushing head comprising:
a first end for positioning at an upper region in the crusher and a second end for positioning at a lower region of the crusher;
a substantially frustoconical section extending between the first and second ends;
a first cylindrical section extending between the first end and the frustoconical section, a junction between the first cylindrical section and the frustoconical section being seamless;
a surface extending between the first and second ends, the surface being outward facing relative to a longitudinal axis bisecting the crushing head;
a second cylindrical section positioned between the second end and the frustoconical section; and
a groove positioned in the second cylindrical section and formed in the outward facing surface, the groove extending in a circumferential direction relative to the longitudinal axis of the crushing head, wherein the groove is an endless groove formed as a channel having a substantially rectangular or square cross-sectional profile, wherein the channel is defined by a pair of parallel sidewalls aligned perpendicular to the longitudinal axis, the parallel sidewalls each being terminated at a radially innermost end by a bottom wall, the bottom wall being parallel to the longitudinal axis and having an axial length substantially equal to an opening of the groove at the outward facing surface.

Assignees

• Sandvik Intellectual Property

Inventors

• Bergman Axel
• Bern Gustav
• Eriksson Bengt-Arne
• Larsson Mikael M
• Malmqvist Patric

Classifications

• B02C2/04 Primary

  with vertical axis · CPC title

• B02C2/06

  and with top bearing {(B02C2/042 takes precedence)} · CPC title

• B02C2/02

  eccentrically moved · CPC title

• B02C2/00

  Crushing or disintegrating by gyratory or cone crushers {(with non-coaxial discs with intersecting axes B02C7/005)} · CPC title