US 11,913,466 B2
Pump and rotary baffle plate
Seigo Kyo, Tokyo (JP); Yoichi Nakamura, Tokyo (JP); Akinori Murata, Tokyo (JP); Soichiro Ogawa, Tokyo (JP); and Dong Min Kim, Tokyo (JP)
Assigned to EBARA CORPORATION, Tokyo (JP)
Appl. No. 17/757,267
Filed by EBARA CORPORATION, Tokyo (JP)
PCT Filed Dec. 16, 2020, PCT No. PCT/JP2020/046853
§ 371(c)(1), (2) Date Jun. 13, 2022,
PCT Pub. No. WO2021/125197, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 2019-226550 (JP), filed on Dec. 16, 2019.
Prior Publication US 2023/0003226 A1, Jan. 5, 2023
Int. Cl. F04D 29/12 (2006.01); F04D 29/04 (2006.01); F04D 29/043 (2006.01); F04D 29/22 (2006.01)
CPC F04D 29/12 (2013.01) [F04D 29/043 (2013.01); F04D 29/22 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A pump comprising:
a rotary shaft,
an impeller that is attached to the rotary shaft and that rotates with rotation of the rotary shaft,
a casing that surrounds the rotary shaft,
a shaft sealing device that seals a gap between the casing and the rotary shaft,
a baffle plate part that is located between the impeller and the shaft sealing device and attached to a rotating body,
the baffle plate part extending in a direction that is inclined or orthogonal with respect to a surface orthogonal to an axial direction of the rotary shaft, and
a rotary baffle plate that is attached to the rotary shaft so as to be located between the impeller and the shaft sealing device,
the rotary baffle plate including a main body part attached to the rotary shaft, and the baffle plate part provided on the main body part,
wherein the main body part includes a curved relief portion near a base of the baffle plate part.