| 摘要 |
An impact crusher having a circular housing with an upper feed tube extending through a cover portion. The feed tube directs material to be reduced to an impeller unit. The impeller unit includes impeller shoes supported between impeller discs which rotate at high speed, and rocks fed to the shoes are impelled by the shoes against outwardly located breaker plates. The impeller shoes are V-shaped in horizontal cross section with the point or apex of the V being directed inwardly toward the center of the impeller unit. The V-shaped impeller shoes have impelling surfaces on two sides thereof for operation in either direction of rotation of the impelling unit. The shoes are held in place by posts and are constructed of at least two plate-like parts disposed flatwise in surface engagement facilitating individual replacement or shifting around to prolong the life of the shoes in their entirety. In one embodiment, the impeller shoes have hardened inserts on the impelling surfaces thereof to provide minimum replacement.
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