| 摘要 |
A high-pressure multistage pump is used for supplying liquid to facilities such as boilers under a high discharge pressure. The high-pressure multistage pump has a barrel-shaped outer casing (1), an inner casing (2a) housed in the barrel-shaped outer casing (1), a cover (3) sealingly closing an axial end of the outer casing (1), a pump shaft (20) rotatably supported in the inner casing (2a) and the cover (3), and an array of impellers (21) mounted on the pump shaft. One of the impellers (21c) has a suction chamber (11) positioned most closely to the cover (3a) and held in communication with an inner space (10) which is jointly defined by the outer casing, the inner casing (2a) and the cover (3). <IMAGE> |
