To provide a multistage turbine pump easy in assembling, and capable of easily absorbing a difference in thermal expansion between an outer cylinder and a bolt even when fluid is at high temperatures.
This multistage turbine pump has a structure for connecting a motor 11 to one end of a pump shaft 10 for driving an impeller 3, by supporting an intermediate casing 4 by a suction side casing 6 and a delivery side casing 8, by fastening the suction side casing 6 and the delivery side casing 8 by a bolt 9, by arranging the suction side casing 6 having a suction port 5 in one end opening part of the outer cylinder 1 and the delivery side casing 8 having a delivery port 7 in the other end opening part, by stacking and arranging a plurality of impellers 3 and the intermediate casing 4 in a multistage shape in a pump room 2, by forming the inside of the cylindrical outer cylinder 1 as the pump room 2. A nonrestricting part 15 is arranged between an inside surface of the delivery side casing 8 and an outside surface of an intermediate casing 4a of the rearmost stage, and a nonrestricting part 21 for allowing the movement in the axial direction of the outer cylinder 1, is also arranged between the suction side casing 6 and the delivery side casing 8 fastened by the bolt 9 and both ends of the outer cylinder 1.
| JP5727881 | Round-cut multi-stage pump |
| JP6344872 | Centrifugal compressor casing and centrifugal compressor |
| WO/2019/176426 | CENTRIFUGAL PUMP |
WATANABE SHIGEHIRO
ODA MAKOTO
OSHITA YASUSHI
Koichi Kawashima
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