Wear protection for tables for centrifugal impact crushers
AssigneeCedarapids, Inc.
InventorsMichael E. Schultz, Claude H. Reber, Harold E. Munsell, Jr.
Life of this patent
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Abstract
A table assembly for a vertical shaft impact crusher includes an impeller having rods embedded vertically in it next to its leading edge. The rods are made from a material which is harder than the material that the body of the impeller is made from. The rods are located where wear is most prevalent. In most situations this would be at both sides of the impeller, but it might be at the center as well. The top surface of the table between impellers is covered with bottom wear plates. The bottom wear plates have raised portions immediately adjacent to the leading edge of the impellers and sloped ramps between the raised portions and the rest of the wear plates.
Claims20
A table assembly for a vertical shaft centrifugal impact crusher comprising:
- (a) a rotatable table having a plurality of impeller mounting brackets mounted thereon at spaced-apart locations;
- (b) a plurality of impellers each having
- a leading edge which engages material being crushed, each leading edge having a cut-out portion;
- and
- a trailing edge which contacts an associated mounting bracket;
- (c) an attachment mechanism associated with each said impeller which attaches said impeller releasably to one of said mounting brackets;
- (d) a plurality of bottom wear plates which cover the exposed portions of said table between said impellers;
- (e) raised portions of said bottom wear plates which are located immediately adjacent to the leading edge of said impellers, said raised portions being raised above the remainder of said bottom wear plates, wherein each raised portion includes:
- a tab which engages a respective cut-out portion of a respective leading edge, thereby causing each impeller associated with each respective leading edge to hold down onto the table a respective bottom wear plate, associated with the respective raised portion, as the table is rotated;
- and
- (f) sloped ramps which extend between said raised portions and the remainder of said wear plates.
An impeller for a vertical shaft centrifugal impact crusher comprising:
- (a) a body having
- a leading edge which engages material being crushed, the leading edge including:
- a cut-out portion for engaging a tab on a bottom wear plate of a rotatable table, thereby causing the body of the impeller associated with the leading edge to hold down onto the table the bottom wear plate as the table is rotated;
- (b) an attachment mechanism which attaches said impeller releasably to a mounting bracket;
- and
- (c) one or more elongate rods which are made from material which is harder than the material said body is made from, said rods being embedded vertically in said body at selected locations near said leading edge.
Dependencies are inferred from the claim text.