Foreign matter entanglement prevention structure and separation device for impeller rotation mechanism

摘要

PROBLEM TO BE SOLVED: To provide a foreign matter entanglement prevention structure and a separation device of an impeller rotation mechanism which can more appropriately produce an entanglement prevention effect and can be easily cleaned and maintained. A member arranged in a fixed state on a side wall portion 41 that partitions an impeller 10 and an inner side 42 of a device in which a rotary blade portion 12 is located and an outer side 43 of the device in which a bearing 50 of a rotating shaft 11 is located. A shaft insertion member 30 is provided so as to form an insertion hole 31 through which the end portion 11a of the rotating shaft 11 is inserted, and the shaft insertion member 30 is provided with a shaft insertion member 30 from the side of the side wall portion 41 to the inside 42 of the device. A convex ring portion 32 formed so that the outer diameter becomes smaller toward the convex step is provided, and the impeller 10 is coaxial with a portion of the end portion 11a of the rotary shaft 11 adjacent to the rotary blade portion 12. The bearing member 20 is provided with a concave ring portion 22 formed in a concave step shape, which is arranged in a fixed state and is fitted so as to follow the shape of the convex ring portion 32. [Selection diagram] Fig. 1