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Volute shaped pump casing for a centrifugal pump

A centrifugal pump and volute technology, which is applied to the components, pumps, and pump elements of a pumping device for elastic fluids, can solve the problems of increased mass and high cost of double volutes, and achieves a reduction in material quality and distance, the effect of reducing the overall height

Active Publication Date: 2012-01-11
SULZER MANAGEMENT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This further leads to an additional substantial mass of material between these cross-channels and the adjacent contours of the housing
Thus, from a cost perspective, the greater height of this conventional double volute leads to an increased mass in the described multi-stage embodiment and thus to a more costly solution

Method used

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  • Volute shaped pump casing for a centrifugal pump
  • Volute shaped pump casing for a centrifugal pump
  • Volute shaped pump casing for a centrifugal pump

Examples

Experimental program
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Embodiment Construction

[0028] figure 1 , 1A and 3 show a conventional volute-shaped pump casing 1 for a centrifugal pump, where figure 1 is the section A’-A’ perpendicular to the axis of rotation, Figure 1A is the section C’-C’ through the outlet section, and image 3 is the axial section B'-B' through a conventional volute-shaped pump casing. The illustrated volute-shaped pump casing comprises a chamber for housing at least one impeller 4 mounted on the shaft 2 for rotation about an axis of rotation 2a when driven, for example by a motor. The housing further comprises a volute chamber forming a flow channel which is divided into a first volute 5.1 extending generally half a circle or less than half a circle respectively, and a first channel 6.1 and a second channel 6.2 As well as the second volute 5.2, the first channel 6.1 and the second channel 6.2 are respectively connected to the first and second volute to lead out the pumped medium.

[0029] Advantageously, the casing comprises at least ...

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Abstract

A volute shaped pump casing (1) for a centrifugal pump includes a chamber for housing at least one impeller (4) mounted on a shaft (2) for rotating the impeller around an axis of rotation (2a), a volute shaped chamber which forms a flow channel divided into a first volute (5.1) and a second volute (5.2), and a first channel (6.1) and a second channel (6.2) connected to the first and the second volute respectively. The first channel is also called long channel and the second channel is also called short channel. In the volute shaped pump casing (1), the first or long channel (6.1) is axially displaced with respect to the second or short channel (6.2) and / or with respect to the second volute (5.2).

Description

technical field [0001] The invention relates to a volute-shaped pump casing according to the preamble of claim 1 and to a centrifugal pump comprising such a volute-shaped pump casing. Background technique [0002] Volute casing pumps are very common. The attribute of these volute casing pumps is characterized by the volute-shaped pump casing, which generally makes this pump type distinguishable from the outside. The housing of the volute type can be constructed as part of a single-stage or multi-stage pump arrangement. In some multi-stage pumps, a volute casing is only provided for the last stage. Both single-suction and double-suction double volute casing pumps are frequently used. [0003] A volute usually includes a chamber designed to house at least one impeller, usually of the radial flow or mixed flow type, mounted on a shaft for rotation when driven by a motor. This housing also includes a volute-shaped chamber that collects the pumped medium and channels and drai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/42F04D29/22
CPCF04D29/448F04D29/42F04D1/00F04D29/40
Inventor A.罗德里古斯
Owner SULZER MANAGEMENT AG
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