| 摘要 |
According to a first aspect, the present invention relates to a propeller pump comprising a pump housing and a pump core that is arranged in the pump housing and has a propeller, which together delimit a channel, and which are connected by means of a guide vane. The propeller pump is characterized in that a cross-sectional area (A2) of the channel (27) at the rear edge (30) of the guide vane (13) has a measure that is greater than, and that is less than a factor of 1.1 times, a cross-sectional area (A1) at the rear edge (29) of the blades (21) of the propeller, and that the specific rotational speed of the propeller pump is greater than 200 and less than 300. According to a second aspect, the present invention relates to a pump station comprising such a propeller pump. |
| 主权项 |
1. A propeller pump for the pumping of liquid, comprising:
an axially extending tubular pump housing (6) having an inner surface (9) and comprising an inlet opening (10) and an outlet opening (11), an axially extending pump core (12) having an envelope surface, at least an axial part section of the pump core (12) being surrounded by said pump housing (6), and at least one radially extending guide vane (13), which is connected to the inner surface (9) of the pump housing (6) and to the envelope surface of the pump core (12), the pump core (6) comprising a drive unit (14) and a hydraulic unit (19) that is situated upstream in relation to the drive unit (14) and that comprises a propeller having a hub (20) and at least one blade (21), furthermore the propeller pump (1) comprises an axially extending channel (27) that extends from the inlet opening (10) of the pump housing (6) to the outlet opening (11) of the pump housing (6), which channel (27), in the radial direction, is delimited by the inner surface (9) of the pump housing (6) and the envelope surface of the pump core (12), respectively, wherein a cross-sectional area (A2) of said channel (27), in the region of a rear edge (30) of said at least one guide vane (13), is greater than a factor of 1.04 times a cross-sectional area (A1) of the channel (27) in the region of a rear edge (29) of the at least one blade (21) of the propeller, the cross-sectional area (A2) of said channel (27), in the region of the rear edge (30) of said at least one guide vane (13), is less than or equal to a factor of 1.1 times the cross-sectional area (A1) of said channel (27) in the region of the rear edge (29) of the at least one blade (21) of the propeller, a cross-sectional area (A3) of said channel (27), in the region of the outlet opening (11) of the pump housing (6), is larger than or equal to the cross-sectional area (A2) of the channel (27) in the region of the rear edge (30) of said at least one guide vane (13), the cross-sectional area (A3) of said channel (27), in the region of the outlet opening (11) of the pump housing (6), is less than or equal to a factor of 1.9 times the cross-sectional area (A1) of said channel (27) in the region of the rear edge (29) of the at least one blade (21) of the propeller, and the propeller pump (1) has a specific rotational speed (nq) that is greater than or equal to 200 and that is less than or equal to 300. |
