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公开(公告)号：EP3077681B1
公开(公告)日：2020-12-02
申请号：EP14868207.3
申请日：2014-12-03
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公开(公告)号：EP3077681A1
公开(公告)日：2016-10-12
申请号：EP14868207.3
申请日：2014-12-03
IPC分类号： F04D29/44
CPC分类号： F04D29/447 , F04D1/003 , F04D13/06 , F04D29/2277 , F04D29/426 , F04D29/669 , H02K7/14 , H02K16/005
摘要： A centrifugal pump with a rotating impeller and a rotating diffuser. The diffuser may be rotated with a controlled speed to broaden the operational range of the pump. Such control may be done independently of the rotational speed of the impeller to tailor pump operation to a particular NPSH, efficiency, fluid flow or related requirement. In one preferred form, the impeller and diffuser are made to counter-rotate relative to one another, while the independent rotational speed of each may be provided by one or more motors, as well as a variable-speed transmission coupled to such motor or motors. Such a pump is optimized for specific speed operating ranges beneath those associated with axial flow pump configurations.
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公开(公告)号：EP3822490A1
公开(公告)日：2021-05-19
申请号：EP20211104.3
申请日：2014-12-03
摘要： A centrifugal pump with a rotating impeller and a rotating diffuser. The diffuser may be rotated with a controlled speed to broaden the operational range of the pump. Such control may be done independently of the rotational speed of the impeller to tailor pump operation to a particular NPSH, efficiency, fluid flow or related requirement. In one preferred form, the impeller and diffuser are made to counter-rotate relative to one another, while the independent rotational speed of each may be provided by one or more motors, as well as a variable-speed transmission coupled to such motor or motors. Such a pump is optimized for specific speed operating ranges beneath those associated with axial flow pump configurations.
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