| 摘要 |
The present invention provides a centrifugal pump which can randomly change highest-efficiency water amount and can select an optimal operation water amount range through an assembly of a housing and an impeller. Furthermore the impeller can rotate with high balance, thereby operating stably. The centrifugal pump is provided with the following components: the impeller (32) which is connected with a rotating shaft (46) and can rotate; the housing (30) which is provided with an outlet (30b) and accommodates the impeller (32) at the internal part; a housing cover (34) which closes the opening part of the housing (30); a guiding board (54) which is provided with a plurality of paths (62a,62b,64a,64b) that are provided at approximately consistent positions after rotating for a preset angle and communicate the impeller side with the housing side, furthermore the guiding board (54) is configured coaxially with the impeller (32) in the housing (30), thereby forming a guiding path (60) communicated with the outlet (30b) between the guiding board (54) and the housing (30); and a closing component (70) which closes other paths at the impeller side except for one path in the plurality of paths. |
