| 摘要 |
A radial shaft seal for sealing a rotating shaft led out from a space filled with a fluid medium, for example for sealing the drive shaft of a coolant pump, minimizes wear, especially the starting wear acting upon the sealing lips in double lip sealing systems, and allows end-of-line motor tests with coolant pumps without cooling liquid for up to several hours without damages to the radial shaft seal. The radial shaft seal includes two sealing bodies, an outer lip element on the pressure side and an inner lip element on the atmosphere side, each having a sealing cylinder resting on the shaft or the sleeve, arranged in a sealing housing with a joined metal supporting body, the sealing cylinders having three adjoining sealing cylinder regions such that on each pressure side a conical inlet surface and opposite thereof on each negative pressure side a conical outlet surface are provided, in each case a cylindrical contact zone being present between the conical inlet surface and the conical outlet surface. A lubrication chamber is defined by the outer lip, the supporting body, the inner lip element having the inner lip and the shaft, or the sleeve and is sealed on all sides, a lubricant medium which is flowable at room temperature and which has a kinematic viscosity in the range of 5,000 mm2/s to 1.000 mm2/s at a residual excess pressure of 0.005 bar to 0.01 bar being arranged in the lubrication chamber. |
