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    • 5. 发明授权
    • Regenerative pump with improved suction
    • 再生泵具有改进的吸力
    • US5265996A
    • 1993-11-30
    • US850446
    • 1992-03-10
    • Paul E. WesthoffRicky D. Reimers
    • Paul E. WesthoffRicky D. Reimers
    • F04D5/00F04D29/18F01D1/12
    • F04D5/002F04D29/188
    • Poor inlet suction characteristics in regenerative pumps may be avoided in a construction including a housing (10) having an impeller receiving cavity (20) with a circular impeller (22) therein. Channel-like annular grooves (32, 34) are disposed in the housing (10) and open to the cavity (20) at sides (36, 38) of the impeller (22). An outlet seal (63) is located in each of the grooves (32, 34) and outlet ports (62) opening to the grooves (32, 34) are located just upstream of the outlet seal (63). Peripheral recesses (42, 44) are located in the impeller sides (36, 38) and have radially inner extremities (59) located radially inward of the channels (32, 34). A plurality of blades (52) are mounted to the impeller (22) within the recesses (42, 44) around the periphery thereof and have radially inner edges (54) spaced from the radially inner recess extremities (59) while being isolated from recirculation within the channels ( 32, 34). An inlet port (70) is disposed in the housing (10) and is located between the radially inner extremity of the grooves (42, 44) and the radially inner edges (54) of the blades (52).
    • 在包括具有在其中具有圆形叶轮(22)的叶轮容纳腔(20)的壳体(10)的结构中,可以避免再生泵中的较差的入口抽吸特性。 通道状的环形槽(32,34)设置在壳体(10)中并且在叶轮(22)的侧面(36,38)处向空腔(20)开口。 出口密封件(63)位于每个凹槽(32,34)中,并且通向凹槽(32,34)的出口(62)位于出口密封件(63)的正上方。 外围凹部(42,44)位于叶轮侧(36,38)中,并具有位于通道(32,34)径向内侧的径向内端(59)。 多个叶片(52)围绕其周边在凹部(42,44)内安装到叶轮(22)上,并且具有与径向内凹槽末端(59)间隔开的径向内边缘(54),同时与再循环 在通道(32,34)内。 入口端口(70)设置在壳体(10)中并且位于凹槽(42,44)的径向内部末端和叶片(52)的径向内边缘(54)之间。