Inner shell intended for a gyratory crusher, and method of attaching such a shell on a crushing head
AssigneeSandvik Intellectual Property AB
InventorsBengt-Arne Eriksson, Knut Kjaerran, Kjell-Ake Svensson, Ib Mortensen
Life of this patent
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Abstract
An inner shell has a first part of a lug-notch arrangement, which first part is arranged to co-operate with a second part of the arrangement to prevent rotation of the inner shell relative to a crushing head. The inner shell has a contact surface in its upper portion and is arranged to be pressed towards the lower portion of the crushing head by a pressing force which is obtained by tightening at least two threaded bolts, which are arranged in the upper portion of the crushing head such that their longitudinal direction is substantially parallel to the symmetry axis of the crushing head.
Claims20
A method of attaching, in a gyratory crusher, an inner shell to a crushing head having a lower portion and an upper portion that is narrower than the lower portion, the inner shell being configured to define, together with an outer shell of the crusher, a crushing gap for receiving a material to be crushed, comprising:
- bringing the inner shell into contact with the crushing head by mounting the inner shell on the crushing head in a direction from the upper portion thereof towards the lower portion thereof;
- using at least one lug to prevent unlimited rotation of the inner shell, when mounted on the crushing head, relative to said crushing head;
- and
- pressing the inner shell towards the lower portion of the crushing head by way of at least two threaded bolts, which are arranged in the upper portion of the crushing head such that their longitudinal direction is substantially parallel to the symmetry axis of the crushing head and then tightened.
An inner shell, which is configured to be attached, in a gyratory crusher, to a crushing head having a lower portion and an upper portion that is narrower than a lower portion to define, together with an outer shell, a crushing gap for receiving a material to be crushed, comprising:
- a first part of a lug-notch arrangement, which first part is arranged to prevent, in co-operation with a second part of said arrangement, unlimited rotation of the inner shell relative to the crushing head;
- a contact surface in its upper portion and being arranged to be pressed towards the lower portion of the crushing head by a pressing force acting on the contact surface and obtained by tightening at least two threaded bolts, which are arranged in the upper portion of the crushing head such that their longitudinal direction is substantially parallel to the symmetry axis of the crushing head.
A gyratory crusher, comprising:
- an inner shell, which is attached to a crushing head having a lower portion and an upper portion that is narrower than the lower portion, and an outer shell, which is attached to a frame forming part of the crusher and which, together with the inner shell, defines a crushing gap for receiving a material to be crushed;
- wherein the inner shell has a first part in a lug-notch arrangement, a corresponding second part of the lug-notch arrangement being arranged adjacent the crushing head for preventing unlimited rotation of the inner shell relative to the crushing head, the inner shell being pressed towards the lower portion of the crushing head by way of at least two threaded bolts, which are arranged in the upper portion of the crushing head such that their longitudinal direction is substantially parallel to the symmetry axis of the crushing head.
Dependencies are inferred from the claim text.