Importance

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Abstract

A pump includes a front casing and a rear casing for defining a space therebetween. An end of the shaft extends into the space with an impeller is supported by a bushing which makes the impeller is rotatable in the space. A wearing ring is attached to a front side of the impeller. The front casing defines a bore in which a buffer is received so as to be axially movable with respect thereto. A thrust ring is attached to the buffer for contactingly engaging the wearing ring whereby when the impeller rotates, the axial movement of the buffer maintains a fluid film between the thrust ring and the wearing ring. An O-ring is mounted to the buffer for providing a buffer function between the buffer and the bore thereby helping maintaining the fluid film.

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First Claim