Patent ID: 8517388
Filing Date: 2013-08-27
Classification: F16J

Abstract:
1. A bellows type mechanical seal for sealing an annular space between a shaft hole formed in a housing and a rotating shaft inserted into the shaft hole, the bellows type mechanical seal comprising: a first annular member fixed to the rotating shaft; a second annular member resiliently supported with respect to the housing through a bellows at a position on an opening side of the shaft hole closer than the first annular member; and a seal ring having a first end sealing face contacting the first annular member in a freely slidable manner and a second end sealing face contacting the second annular member, both sealing faces being perpendicular to an axis line, wherein a centering member is arranged in an inner peripheral surface recess of the seal ring and an inner peripheral surface recess of the second annular member facing a non-sealed region in the annular space to keep axis lines of the seal ring and the second annular member in alignment with each other.