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    • 63. 发明公开
    • CASCADED PROGRESSING CAVITY PUMP SYSTEM
    • IN KASKADE GESCHALTETE EXENTERSCHNECKENPUMPEN
    • EP1003974A4
    • 2000-05-31
    • EP97944362
    • 1997-09-18
    • ROBBINS & MYERS
    • WILD ALAN GMIRZA KAMRAN ZCHANG SHELDON S L
    • F01C1/30F04B3/00F04B23/00F04C20060101F04C2/107F04C11/00F04C18/00F04C23/00F04C29/04
    • F04C2/1071F04C11/001
    • At least two progressing cavity pumps or pump sections are connected in series. The flow volume rate of the second pump or pump section is less than the flow volume rate of the first pump or pump section. If there are more than two pumps or pumps sections, the flow volume rate of the third pump or pump section would be less than the flow volume rate of the second pump or pump section, and so on. The cascade arrangement of progressing cavity pumps can be achieved by interconnecting separate pump assemblies end to end. The cascade arrangement of progressing cavity pump sections can be achieved by the attachment of the rotor/stator pairs of each pump section in series with suitable universal mechanisms and housings. Such a cascade arrangement of progressing cavity pumps or pump sections allows and compensates for the compressibility of the gas in the two-phase or multi-phase fluid being pumped, especially in pumping operations requiring high differential pressures.
    • 至少有两个前进空腔泵或泵部分串联连接。 第二泵或泵部分的流量比小于第一泵或泵部分的流量。 如果有两个以上的泵或泵部分,则第三个泵或泵部分的流量将小于第二个泵或泵部分的流量,等等。 前进空腔泵的级联布置可以通过将分开的泵组件首尾相连来实现。 可以通过将每个泵部分的转子/定子对与适当的通用机构和外壳串联连接来实现前进空腔泵部分的级联布置。 这种渐进式空腔泵或泵部分的级联布置允许并补偿被泵送的两相或多相流体中的气体的压缩性,特别是在需要高差压的泵送操作中。