US 12,275,509 B2
Fluid machine and underwater vehicle
Shigeki Senoo, Tokyo (JP); Shinichi Isobe, Tokyo (JP); Wataru Yamada, Tokyo (JP); Takehiko Nishida, Tokyo (JP); Takuyoshi Yamada, Tokyo (JP); Kazuki Hosono, Tokyo (JP); Yoshitomo Noda, Tokyo (JP); Hiroki Takeda, Tokyo (JP); and Yuichi Sekine, Tokyo (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed by MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed on Mar. 23, 2022, as Appl. No. 17/702,106.
Claims priority of application No. 2021-061822 (JP), filed on Mar. 31, 2021.
Prior Publication US 2022/0315184 A1, Oct. 6, 2022
Int. Cl. B63H 1/28 (2006.01); B63G 8/08 (2006.01); B63H 21/17 (2006.01)
CPC B63H 1/28 (2013.01) [B63G 8/08 (2013.01); B63H 21/17 (2013.01)] 9 Claims
OG exemplary drawing
 
6. A fluid machine comprising:
a shaft portion extending along an axis in an axial direction;
a shroud provided to surround the shaft portion, and forming a flow path between the shroud and the shaft portion, the flow path having one side in the axial direction serving as an upstream side and another side in the axial direction serving as a downstream side;
a first propeller provided rotatably around the axis in the flow path;
a second propeller provided rotatably around the axis on the downstream side of the first propeller in the flow path;
an outer periphery driving motor provided in the shroud and configured to rotationally drive one of the first propeller and the second propeller; and
an inner periphery driving motor provided in the shaft portion and configured to rotationally drive one of the first propeller and the second propeller, wherein
the shroud includes a plurality of segments split into a plurality of pieces in the axial direction, and
the fluid machine further comprises a coupling portion configured to couple the plurality of segments in the axial direction.