| 摘要 |
The present invention relates to a rotary joint for the transfer of pressurised working fluid from a stationary machine part to a rotating machine part and/or vice versa, comprising a housing associated with the stationary machine part, a shaft associated with the rotating machine part, which shaft extends into the housing and optionally also therethrough, at least one bush accommodated in the housing, which bush tightly surrounds the shaft and is mounted sealedly in the housing in such a way as to be radially resiliently movable, the inner surface of the bush and the circumferential surface of the shaft being provided with sealing faces which slide against each other, and the bush comprising at least one radial bore which is connected, via an annular channel encircling the circumferential surface of the shaft and/or the inner surface of the bush, with at least one radial bore in the shaft for conveying pressurised working fluid through the bush to a fluid duct which extends axially in the shaft and is connected with the radial bore in the shaft. To provide a rotary joint with the above-mentioned features, which permits a further increase in shaft diameter, in the relative speeds of surfaces sliding against each other and/or in the pressures, especially also varying pressures, at which working fluid may be supplied, it is proposed according to the invention that a relieving device be provided by constructing the bush with at least one radial bore separate from the fluid feed bore, which radial bore extends to a relieving channel formed either on the inner surface of the bush and/or the outer surface of the shaft and may be loaded with pressurised fluid. |
