Patent ID: 7614863
Filing Date: 2009-11-10
Classification: F01C,F04C

Abstract:
1. A pump, with a rotor, which is present fixedly in terms of rotation on a drive shaft connectable to a motor drive and which possesses a radially projecting rotor collar running around in a wavy manner, and a rotor hub, surrounding a projecting end region of the drive shaft, with delimiting faces delimiting the rotor collar on both sides in the axial direction and leaving between them a pumping duct, with an inlet and an outlet for the pumping duct, with an axially adjustable sealing slide bearing sealingly against the rotor collar on both sides in the axial direction and subdividing the pumping duct between the inlet and the outlet, characterized in that a first bearing for the drive shaft, for the supporting the mounting of the drive shaft in the radial direction and for absorbing radial and axial forces, is present at the projecting end region of the drive shaft within a clear space region in the axial direction of the shaft occupied by the rotor collar; this first bearing has at least one bearing which is present within the clear space region occupied in the axial direction by the rotor collar, a bush is present on the inside of a the rotor hub of the rotor in such a way that the bush sealingly covers each of the bearings which are freely accessible after the removal of the rotor from the drive shaft, there is in the rotor hub at least one ventilation duct through which air can flow when the rotor is pushed onto the bush or when the rotor is drawn off from the bush, and a ventilation groove is present and is integrally formed in the rotor hub on the inside as a ventilation duct.