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Impeller wheel

A technology of impellers and blades, applied in the field of centrifugal pumps or semi-axial flow pumps, which can solve problems such as low input and high risk of clogging

Inactive Publication Date: 2007-10-24
ITT MFG ENTERPRISES LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, closed impellers have a lower input, which means a higher risk of clogging

Method used

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Examples

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Embodiment Construction

[0024] Figure 1 shows a closed impeller mounted in a pump comprising a drive shaft 10 connected to a motor (not shown) for driving it. The lower end of this axle is equipped with pump impeller 12, and it comprises loam cake 14, lower cover dish 16, blade 18 and trailing blade 19. The pump components mentioned above are installed in the pump chamber 20 , which has a bottom wall 22 , an inlet 24 and an outlet 26 . The pump impeller 12 is installed in the pump chamber 20 so that there is a gap 28 between the peripheral surface of the lower cover plate 16 and the inner side wall of the pump chamber 20, a gap 29 exists between the lower plate and the chassis, and a gap 29 exists between the lower surface 16 of the lower cover plate. There is a gap 30 from the upper surface of the bottom wall 22 .

[0025] According to the principle of a centrifugal pump, fluid drawn axially through the inlet 24 will leave the pump through the outlet 26 according to the arrows A, B and C indicating...

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PUM

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Abstract

The present invention relates to a pump impeller (12) of a centrifugal or half axial type to be used in a pump for pumping liquids, wherein the impeller is arranged with one or several vanes (18), that the vanes are attached to cover discs (12, 16) on each side, forming a so called closed impeller wheel, characterized in that the leading edges (40) of the vanes are swept backwards at the inlet opening (42) in one of the cover discs (16) of the impeller.

Description

technical field [0001] This invention relates to pump wheels, and more particularly to centrifugal or semi-axial pumps for pumping fluids containing contaminants. Background of the invention [0002] Various types of pumps and pump impellers are described in the literature for the above purposes, but all of these suffer from several disadvantages. This starts with issues of wear, clogging and inefficiencies. [0003] Sewage contains a large number of different types of pollutants, the amount and structure of which depend on the season and the type of area from which the sewage is discharged. In cities, plastics, hygiene products, fabrics, etc. are common, while in industrial areas abrasive particles are produced. Experience has shown that the most serious problem is rags and the like, which cling to the leading edge of the blade and wrap around the hub. Such accidents often increase maintenance intervals and reduce efficiency. [0004] Different types of special pumps ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/24F04D29/18F04DF04D29/22
CPCF04D29/242F04D29/2288F04D29/183F05D2210/11Y10S416/00Y10S415/00Y10S417/00F04D7/045
Inventor M·林德斯科格
Owner ITT MFG ENTERPRISES LLC