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Technique to improve performance of pump with trimmed impeller using additive manufacturing

A technology of additive manufacturing and impeller, which is applied in the direction of manufacturing tools, components of pumping devices for elastic fluids, additive manufacturing, etc., and can solve problems such as reduced pump efficiency

Active Publication Date: 2020-02-14
FLUID HANDLING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pump efficiency is almost always reduced when the impeller is trimmed and the ring geometry is unchanged

Method used

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  • Technique to improve performance of pump with trimmed impeller using additive manufacturing
  • Technique to improve performance of pump with trimmed impeller using additive manufacturing
  • Technique to improve performance of pump with trimmed impeller using additive manufacturing

Examples

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Embodiment Construction

[0029] Consistent with the above, it is common practice in the pump industry to use the same pump casing and change or "trim" the impeller designed for that pump casing in order to cover a wide range of pumping performance requirements. This allows for reducing the rather large inventory that companies must carry. For example, pumps whose performance curves are figure 1 Shown in , this pump uses one pump housing and allows the user to choose from several different impeller diameters to meet the application requirements for the pump they need.

[0030] Although very efficient from a stock point of view, the disadvantage is the reduced efficiency of the centrifugal pump with further trimming of the impeller. This is due to the fact that the geometry of the volute or other annular geometry is designed to match the full size impeller for maximum efficiency. When an impeller is trimmed, the performance characteristics of the pump are altered and often the efficiency of the pump ...

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Abstract

A pump features a trimmed impeller having a trimmed impeller diameter that is less than a standard full-sized diameter of a standard full-sized impeller for a standard full-sized casing, and having acircumferential outer edge; and a modified standard full-sized casing having dimensions corresponding to the standard full-sized casing and configured to house the trimmed impeller for pumping a fluid, having an outer peripheral wall, and having an inner annular volute portion between the circumferential outer edge of the trimmed impeller and the outer peripheral wall configured with a volume of material deposited using an additive manufacturing process so as to fill in vacant space otherwise caused by the trimmed impeller diameter being less than the standard full-sized impeller diameter. Theadditive manufacturing process is a directed energy deposition.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Provisional Patent Application No. 62 / 491,325, filed April 28, 2017, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to a pump; and more particularly to a pump having a trimmed impeller. Background technique [0004] In order to minimize the stock and arrangement of impellers and volutes carried by the pump company, the pump company will reduce the diameter of the impeller to meet customer performance when those requirements are less than what the pump is capable of pumping with the impeller at its full design diameter need. This is known as "impeller dressing" and is very common in the pumping industry. However, the pump housing remained constant and only the impeller was modified. [0005] Some disadvantages of known devices include the following: [0006] The problem with impeller trimming is that th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D1/00F04D13/00F04D29/00F04D29/40F04D29/42
CPCB23K10/027B23K15/00B23K15/0086B23K15/0093B23K26/0006B23K26/342B23K2103/05B23K2103/10F04D29/2222F04D29/426F04D29/428F04D29/628B22F7/08B33Y80/00B33Y10/00F04D29/026B22F10/25B22F10/00F04D1/00F04D17/08F04D29/2216F04D29/42F05D2230/31F05D2230/80
Inventor J·D·洛佩斯
Owner FLUID HANDLING