| 摘要 |
<p>A suction flow preswirl control bypass structure for blowers, adapted to attain the reduction of shaft power thereof, an increase of the amount of pressure rise of a fluid by an impeller of the blower, the improvement in the efficiency of the blower, the improvement in the flow of the fluid in the portion of the blower which is in the immediate neighborhood of an impeller in a suction pipe, and the reduction of noise of the blower by reasonably controlling the energy occurring due to the speed of a flow of a fluid in its swirling direction which has a preswirl occurring in the portion of the blower which is close to the impeller in the suction pipe. This structure is a bypass structure (5) which bypasses energy by using a fluid as a medium and which is disposed on the upstream side of an impeller in the flow of a fluid flowing onto the impeller (1), and comprises the predetermined region of a suction pipe (2) commonly used as a part of the bypass structure (5), a fluid chamber (3) as a closed space region provided on the outer side of the suction pipe (2) and enabling the fluid to flow, and a communication passage (4) by which the closed space region and suction pipe (2) are combined with each other.</p> |
