Wear bars for impellers
AssigneeKennametal Inc.
InventorGary J. Condon
Life of this patent
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Abstract
The present invention is particularly, but not exclusively, useful for reducing wear of component parts of impact-type rock-crushing machines caused by earth aggregate flows during operation of impact crushers. The present invention includes a central feed body and impeller shoe that has hard material insert bars fixed therein to reduce wear. The exposed top surface of the central feed body and front face of the impeller shoe are impregnated with a plurality of cemented carbide insert bars. The cemented carbide insert bars form an upper composite matrix that helps to reduce wear and the premature wash out of the hard material insert bars integrally cast within the central feed body.
Claims16
A rock-crushing machine for hurling aggregate material toward anvils said rock-crushing machine comprising a central feed body housing having a central axis, a top surface and a peripheral surface, wherein said top surface includes a plurality of hard material insert bars, said bars integrally fixed within said housing in a preselected pattern comprising:
- a) a plurality of radially directed spoke insert bars wherein said spoke insert bars abut against each other and extend radially from said central axis;
- and
- b) a plurality of concentric groups of intercepting insert bars, wherein said top surface includes a radial recesses between said intercepting insert bars in each group, wherein each radial recess has a central longitudinal axis, and wherein each said radial recess central longitudinal axis intersects with an intercepting insert bar in an adjacent concentric group.
A rock-crushing machine for hurling aggregate material toward anvils, said rock-crushing machine comprising:
- a shoe comprising a shoe housing body having a front face having two side rails and a central flat portion between said side rails, said side rails each have a longitudinal axis,
- wherein said body includes a plurality of hard material insert bars integrally fixed within said housing in a preselected pattern, wherein said insert bars have six generally flat surfaces including two end faces, a first contact surface, a second contact surface and a third contact surface and wherein said first contact surface is oriented at an angle with respect to said third contact surface.
Dependencies are inferred from the claim text.