Multi stage centrifugal pump system

A technology of centrifugal pumps and units, applied in the direction of pumps, pump components, pump devices, etc., can solve the problem of not ensuring continuous injection of liquid
CN102734176AInactive Publication Date: 2012-10-17GRUNDFOS MANAGEMENT AS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GRUNDFOS MANAGEMENT AS
Publication Date
2012-10-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

A multi-stage centrifugal pump assembly includes at least two impellers (2, 6) and two impeller groups (4, 8) which are consecutive in a flow direction and each with at least one impeller (2, 6). A backflow channel (24) connects an exit side of the first impeller group (4) to an entry side thereof is located in a first impeller group (4) of the two impeller groups (4, 8).
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Description

technical field

[0001] The invention relates to a multistage centrifugal pump assembly with at least two impellers, ie an at least two-stage centrifugal pump assembly. Background technique

[0002] In this multi-stage centrifugal pump unit, a plurality of impellers are arranged successively along the conveying direction, so that the pressure is increased step by step. The problem with such centrifugal pump assemblies is that they must first be evacuated of air and filled with liquid when they start to operate. This centrifugal pump unit is not self-priming. This is disadvantageous in certain use cases, for example in fire extinguishing installations where continuous injection of liquid, in particular water, cannot be ensured. In such installations it is important that the pumps used are self-priming. Contents of the invention

[0003] Therefore the object of the present invention is to improve the multi-stage centrifugal pump unit so that it becomes self-priming. [00...

Claims

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