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Multistage self-priming centrifugal pump unit

A technology of self-priming centrifugal pumps and centrifugal pumps, applied in the direction of pumps, driving pumps, pump components, etc., to achieve the effects of preventing eddy currents, improving self-priming process, and shortening self-priming time

Inactive Publication Date: 2019-03-01
GRUNDFOS HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The centrifugal pump unit described here has been successfully tested, however a certain starting time is required for the self-priming process

Method used

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  • Multistage self-priming centrifugal pump unit
  • Multistage self-priming centrifugal pump unit
  • Multistage self-priming centrifugal pump unit

Examples

Experimental program
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Embodiment Construction

[0029] with the help of Figure 1 to Figure 5 The illustrated centrifugal pump assembly is a multistage self-priming centrifugal pump assembly of inline design, which is designed for vertical operation, ie for vertical placement. here, in figure 1Only the pump-side part of the centrifugal pump unit is shown, which is designed to stand on a horizontally oriented surface on the foot part 1 and which has a suction connection 2 and a counter to this suction connection. Standard pressure port 3, as usual in inline pumps (Inlinepumpen). A central pump part 5 with a plurality of pump stages 4 is attached to this foot part 1 configured as a casting, said pump part being closed at its upper end by a head part 6 also formed by casting, which The upper part simultaneously forms the motor mount 7 for the electric motor to be connected there. The (not shown) electric motor is connected via a (also not shown) coupling to a central shaft 8 which runs through the pump from the head part 6 ...

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PUM

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Abstract

The present invention relates to a multistage self-priming centrifugal pump unit having at least two pump stages (4) successively disposed along the main flow direction (32) and parallel to at least one pump stage (4) set up a return flow channel (13). The return channel (13) is joined along the main flow direction (32) after the first pump stage or another pump stage (4).

Description

technical field [0001] The invention relates to a multistage self-priming centrifugal pump unit. Background technique [0002] Such a multistage centrifugal pump assembly is known from patent document EP 2 505 842 A1, which is designed to achieve self-priming properties when filled with only a small amount of conveying fluid. The centrifugal pump unit described here has been successfully tested, but requires a certain start-up time for the self-priming process. [0003] From the prior art of patent document DE 4415157 A1 it is known that, in a multistage centrifugal pump, the delivery fluid is guided back during the suction phase by opening a non-return valve. Furthermore, the air separator is arranged such that the air located in the unit can be replaced during the suction phase by a fluid which is stored in the chamber of the pump, whereby self-priming of the pump can be ensured. Contents of the invention [0004] The object of the present invention is to further impro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D9/02F04D1/06F04D9/00
CPCF04D1/063F04D9/003F04D9/02F04D9/005F04D1/10F04D13/06F04D15/0011F04D29/043F04D29/22F04D29/426F04D29/445F04D29/70
Inventor B·温瑟尔·托夫特奥格·布鲁恩
Owner GRUNDFOS HLDG