Structure for supporting rotary shaft

Details Structure for supporting rotary shaft Structure for supporting rotary shaft

B - Operations, Transporting

01

D

B01D 63/16 (2006.01) B01D 33/21 (2006.01) F16C 33/72 (2006.01) F16C 33/76 (2006.01)

Patent

CA 2315960

A rotary shaft (20) is inserted to a tank (12) through a hole (22) formed in a wall of the tank (12). A casing (30) is provided outside the tank (12), and the rotary shaft (20) is supported by a bearing (76) arranged in the casing (30). The casing (30) is watertightly connected to the wall including the hole (22) through a flexible joint (34). Seal members (50, 52, 60) are arranged in the casing (30) to seal the clearance (22a) between the rotary shaft (20) and the casing (30). A sleeve (64) is fitted on the rotary shaft (20) so that the sleeve (64) is watertightly in contact with at least one of the seal members (50, 52, 60), and the sleeve (64) can be moved along the rotary shaft (20) to change the seal member (50, 52, 60) in contact with the sleeve (64). The bearing (76) and the seal member (50, 52, 60) are not affected by the deformation of the tank (12) since the flexible joint (34) connects the tank (12) and the casing (30), and the rotary shaft (20) can rotate smoothly while securing high sealing quality. The alignment of the axes of the bearing (76) and the hole (22) in the tank (12) can be easy since the bearing (76) is provided outside of the tank (12), and thus assembly and maintenance of the structure are easy. The tank (12) can have relatively low strength since the tank (12) has not to support the rotary shaft (20) with the bearing (76); thus the structure can be compact and the cost can be reduced.

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