JPS56124767A - Shaft seal - Google Patents

Abstract

PURPOSE: To obtain a shaft seal having a high PV value by forming the grooves inclined radially so that the distance from the line of axis towards the direction of revolution on the surface which revolves and so that the distance increases on the surface which does not revolve.

CONSTITUTION: An interconnection surface S is constituted by contacting the end surface 12 of the sealing ring 7 which is fitted movably in the direction of axis onto the inner cylinder 6 which is the elongation part of the peripheral part of a cover 2, with the end surface 13 of the sealing ring 5 fixed on a shaft 3. On the end surface 12 of the sealing ring 7, the grooves 14 which incline radially are formed so that the distance from the line of axis towards the direction A of revolution of the shaft 13 increases, and on the end surface 13 of the sealing ring 5, grooves 15 are frmed so that the distance decreases. When the sealing ring 5 is revolved by a shaft 3, the fluid between the grooves 14 and 15 is pushed-out in the direction of outer periphery by a centrifugal force and viscosity, and the end surfaces 13 and 12 are lubricated, and the amount of leak outside of the fluid L in the casing is reduced.

COPYRIGHT: (C)1981,JPO&Japio