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Volute shaped pump casing with splitter rib

A technology of separator and volute, which is applied in the direction of pumps, parts of pumping devices for elastic fluids, pump elements, etc., can solve problems such as inability to overcome the instability of pressure head performance curves, and achieve flow separation minimization, The effect of risk minimization

Inactive Publication Date: 2013-01-09
SULZER MANAGEMENT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional separator rib designs cannot overcome the instabilities of the above-mentioned indenter performance curves

Method used

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  • Volute shaped pump casing with splitter rib
  • Volute shaped pump casing with splitter rib
  • Volute shaped pump casing with splitter rib

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] Figure 1A A section perpendicular to the axis of rotation is shown through a conventional volute pump casing 1 for a centrifugal pump. The volute pump casing comprises a chamber for accommodating at least one impeller rotatable about an axis of rotation and also comprises a volute chamber forming a flow channel and containing a separator rib 3 with a front The rim 3 a serves for example to divide the flow channel into at least two scroll chamber sections 5 . 1 , 5 . 2 , which are referred to below as outer and inner scroll chamber sections. In the assembled state of the pump, the outer and inner volute chamber sections are arranged around the at least one impeller and generally each extend about half or part of a circle. The resulting flow channel may also comprise an outer channel 6.1 and an inner channel 6.2 upstream of the outer and inner scroll chamber sections 5.1 and 5.2, respectively. The volute pump casing also usually includes a discharge conduit 8, which is ...

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PUM

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Abstract

A volute shaped pump casing (1) for a centrifugal pump includes a chamber for housing at least one impeller rotatable around an axis of rotation and a volute shaped chamber which forms a flow channel and which contains a splitter rib (3) for dividing the flow channel formed wherein in a section perpendicular to the axis of rotation a mean camber line (3d) is positioned equidistantly between an inner and outer surface of the splitter rib. In the volute shaped pump casing (1) the thickness of the splitter rib (3) is varied along the mean camber line and for the mean camber line unwrapped to a straight line there is a maximum in the thickness of the splitter rib, with the thickness at said maximum being called maximum thickness s, wherein said maximum is positioned at a distance L from the leading edge (3a) of the splitter rib, and wherein the distance L is in the range between 1.4 times the maximum thickness s and 6 times the maximum thickness s.

Description

technical field [0001] The invention relates to a volute pump casing according to the preamble of claim 1, a method of manufacturing a volute pump casing according to the preamble of claim 9, and a centrifugal pump comprising such a volute pump casing. Pump. Background technique [0002] Volute pumps are very common. They are typically characterized by a volute-shaped pump casing which, in general, makes it possible to identify the pump from the outside. Figure 1A A cross section of a typical volute pump casing is shown. Volute pumps are usually single stage. Two-stage and multi-stage volute pumps are relatively infrequently used. In some applications, the volute is only provided for the last stage. Both single-suction and double-suction volute casing pumps are often used. [0003] A volute generally includes a chamber designed to house at least one impeller, usually of the radial or mixed flow type, mounted on a rotating shaft for rotation when driven by a motor. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/42F04D29/44
CPCF04D29/428F04D29/445Y10T29/49243F05D2240/121
Inventor P.弗吕基格A.罗德里古斯
Owner SULZER MANAGEMENT AG