| 摘要 |
<p>An electric motor (1) includes a pump leg (6) on the driving side thereof, and a bracket (1a), a flange (7), discharge joints (3a and 3b), extension tubes (4a and 4b) and a volute chamber cover (41a) are integrated into the pump leg 6. The extension tubes (4a and 4b) are arranged opposite to each other at the positions spaced away from each other by an angle of about 180 degrees in the circumferential direction. A volute chamber (10a) of a first pump (40a) and a volute chamber (10b) of a second pump (40b) are formed integral with a distance suction casing (45) fixedly secured to the lower surface of the pump leg (6) while a suction port (46a) for the first pump (40a) is located opposite to a suction port (46b) of the second pump (40b). In addition, a volute chamber cover (41b) is fixedly secured to the lower surface of the distance suction casing (45). The volute chamber (10a) is communicated directly with the extension tube (4a), while the volute chamber (10b) is communicated with the extension tube (4b) via an intermediate discharge port (17) which is formed integral with the distance suction casing (45) while extending in the axial direction in the region located sideward of the volute chamber (10a). <IMAGE></p> |
