Importance

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Abstract

A rotary union comprised of housing defining a generally cylindrical chamber, a rotatable shaft, a plurality of stationary bearings and an end cap. The cylindrical chamber is open at one end. The housing has an inlet port and an outlet port through the housing in communication with the chamber. The chamber has a shaft rotatably mounted therein on stationary bearings contained within the chamber. The rotating shaft has a port axially spaced to be in line with the inlet port in the housing to receive a fluid with lubricating capacity. The fluid is conducted through the shaft by way of a second port to a rotating element which the shaft is suitably affixed. The fluid is allowed to seep within the union, thereby providing a lubricating function. The shaft, also, has a plurality of drain ports in communication with the outlet port in the housing to permit discharge of seepage fluid. An end cap preceded by a shim is placed in the chamber opening, enclosing the opening. The end cap, when tightened, adjusts certain clearances between elements within the rotating union such that certain fluid seepage paths ae modified.

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First Claim