Patent ID: 6085782
Filing Date: 2000-07-11
Classification: B23Q,F16L,Y10T

Abstract:
A device for transferring a fluid from a stationary machine part to a rotating machine part by means of a rotary joint, the rotary joint comprising at least one transition surface and having a pipe portion, wherein an at least partially tubular connecting rod rotating with the rotating machine part is provided thereon for the purpose of conveying the fluid, said rod extending into the area of the rotary joint, the connecting rod being axially displaceable with respect to the rotary joint and having a maximum axial displacement which occurs during use of the device, the connecting rod and the rotating machine part each comprising pipe members, characterised in that the rotating transition surface of the rotary joint is associated with a media delivery pipe which is disposed with radial play coaxially with respect to the connecting rod of the rotating machine part and overlaps the connecting rod in the axial direction by an amount which is greater than the maximum axial displacement of the rotating connecting rod which occurs during use of the device relative to the co-rotating media delivery pipe, wherein the radially outer one of the two pipe members, has at least one substantially axially extending fluid transfer duct in its wall and wherein the inner one of the two pipe members is closed at its end projecting into the outer pipe member, in that two seals between the connecting rod and the pipe portion are provided in the overlap area at an axial distance from each other which is likewise greater than the above-mentioned, maximum relative axial displacement, in that both the pipe portion and the connecting rod each comprise a bore in the area between the seals, these bores being for the passage of the fluid either from the axial ducts of the radially outer pipe member or from the inside of the inner pipe member into the space formed between these pipe members by the radial play and thence into the respective other pipe member.