Rotary transmission leadthrough

摘要

The subject-matter of the main application P 3508076.0 is a rotary transmission leadthrough for the admission of a liquid to the cutting edges of tools of heading and winning machines for mining or tunnelling, consisting of a stator connected to a liquid feed and a rotor surrounding the stator and having a plurality of outlets for spraying the cutting edges of the tools, the stator and the rotor being connected to one another for the passage of the liquid via channels or the like, and at least one radially arranged channel of the stator being allocated to the outlets passing through the rotor, which channel leads into an axially running channel of the stator. In order to improve the aforesaid rotary transmission leadthrough to the effect that a pressure build-up between the stator and its end part placed in front of it is avoided and manufacture is simplified, in particular with regard to the bushes in the outlets of the rotor, it is proposed according to the invention that the stator (1) extend with its end surrounded by the rotor (5) into a bush (3) which is closed at one end by means of a base (7) and has at least one passage opening (8) passing radially through the bush (3) and in alignment with the radial channel (4) of the stator (1). Pushed onto the bush (3) is a tube piece (12) which is provided with radial passages (13) in accordance with the number of outlets (6) of the rotor (5), which passages (13) are connected to the outlets (6) of the rotor (5). <IMAGE>