| 主权项 |
1. A vertical centrifugal separator comprising:
a casing constituting a vessel; a centrifugal separation bowl that is rotatably disposed within the casing; a rotary shaft of the bowl, the rotary shaft being provided on an upper side of the bowl and extending in a vertical axis direction; a drive unit that is disposed outside the casing and rotates the rotary shaft; and a bearing mechanism that is disposed in an opening of the casing and rotatably supports the rotary shaft passing through the opening, wherein the bearing mechanism includes a housing that surrounds the rotary shaft, a bearing that rotatably supports the rotary shaft, and a shaft sealing mechanism that is disposed at an end portion of the bearing mechanism on the side of the casing and seals a clearance between the housing and the rotary shaft, and the shaft sealing mechanism is a contactless shaft sealing mechanism in which a rotary sealing ring is disposed on the side of the rotary shaft of the bowl, a stationary sealing ring including a seal assembly that opposes the rotary sealing ring is disposed on the side of the housing, and sealing is achieved by forming a static pressure space between the rotary sealing ring and the seal assembly using a sealing pressure gas whose pressure is adjustable, the pressure gas being introduced from outside. |
