| 摘要 |
PCT No. PCT/SE82/00037 Sec. 371 Date Sep. 23, 1982 Sec. 102(e) Date Sep. 23, 1982 PCT Filed Feb. 10, 1982 PCT Pub. No. WO82/02748 PCT Pub. Date Aug. 19, 1982.A side-channel pump comprising an open impeller (11) and a side-channel (13A; 13B) formed with a semi-circular side wall and having an inlet (14) and an outlet (15). Between the inlet and the outlet there is provided a bead (21) projecting substantially axially into the side-channel, which is located in the vicinity of the inlet and has a height which ranges from about 25% to about 40% of the internal radius of the side-channel.
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