Multi-stage centrifugal pump having tie rods formed from sheet metal

  • US 10,808,703 B2
  • Filed: 12/07/2016
  • Issued: 10/20/2020
  • Est. Priority Date: 12/17/2015
  • Status: Active Grant
First Claim
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1. A multi-stage centrifugal pump comprising:

  • a foot part;

    a head part;

    pump stages integrated between the foot part and the head part, said pump being designed as an inline pump;

    a suction connection and a delivery connection in the foot part, wherein the pump stages are surrounded by an annular channel, by way of which a last pump stage is connected to the delivery connection, the annular channel having an outer channel wall;

    tie-rods arranged on the outer channel wall, said tie-rods connecting the head part and the foot part to one another, each of the tie-rods being fixed with one end to the head part and with another end to the foot part, wherein the tie-rods each comprise a thread end, with which thread end the tie-rods are tightened on the head part or on the foot part and the tie-rods comprise at least one sheet metal section, one of the foot part and the head part comprising a plurality of fixing projections, each of the tie-rods comprising at least one recess in the at least one sheet metal section at the another end, wherein each of the tie-rods is positively fixed on the one of the foot part and the head part at least in a pulling direction via one of the fixing projections extending into the at least one recess.

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