Patent ID: 6685192
Filing Date: 2004-02-03
Classification: F16J

Abstract:
A tandem seal comprising:a housing; a rotating shaft provided in the housing; a primary mechanical seal and a secondary mechanical seal arranged in a tandem manner in an axial direction along the rotating shaft in a space between the rotating shaft and the housing, wherein a center liquid is sealed in a center room among the housing and the primary and secondary mechanical seals, wherein the center liquid has an amount enough to be stirred or agitated by a rotating part of the secondary mechanical seal, wherein a liquid surface level in a stationary state of the center liquid is set substantially to a shaft center of the rotating shaft, and wherein a baffle plate is fixed to the housing above the liquid surface level in the stationary state of the center liquid in such a way that the center liquid collides with the baffle plate when the rotating shaft rotates relative to the baffle plate, so as to lead to effective stirring and successful scattering to form a mist.