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Pumps for conveying waste water and impellers and base plates for such pumps

A technology for impellers and waste water, which is applied to parts of pumping devices for elastic fluids, pumps for special fluids, pumps, etc., which can solve problems such as maintenance costs, blockage of pump impellers, and decreased hydraulic efficiency, and achieve high hydraulic efficiency. Effect

Active Publication Date: 2017-10-24
SULZER MANAGEMENT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Problems arise when conveying waste water, and especially waste water from households, since these liquids contain fibrous material, rags, textiles or other solid matter, which can easily adhere to the area of ​​the pump and can subsequently lead to a loss of pump efficiency, In particular, the hydraulic efficiency of the pump decreases until the impeller of the pump is completely blocked and causes repairs (Serviceeinsatz) or frequently costly maintenance work

Method used

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  • Pumps for conveying waste water and impellers and base plates for such pumps
  • Pumps for conveying waste water and impellers and base plates for such pumps
  • Pumps for conveying waste water and impellers and base plates for such pumps

Examples

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Embodiment Construction

[0031] figure 1 A sectional view of an exemplary embodiment of a pump according to the invention for conveying waste water or liquids containing solid matter is shown, which is designated as a whole by the reference number 1 . The pump 1 comprises, in a known manner, a base plate 2 provided with a working surface 21, said base plate 2 being fastened to the housing 6 by means of a plurality of bolts 7; From the inlet opening 4 to the outlet (Auslass) 5 of the pump. In the pump 1 according to the invention, the impeller 3 is designed with a plurality, ie at least two blades 31 , which are arranged on a carrier body 32 of the impeller 3 . In the exemplary embodiment described here, the impeller 3 comprises exactly two blades 31 , but embodiments are also perfectly possible in which the impeller 3 comprises more than two and in particular three blades. In the operating state, the impeller 3 is driven in rotation about an axis of rotation A by an electric motor (not shown), where...

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PUM

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Abstract

An impeller for a pump for conveying waste water is proposed, said impeller having a support body (32) rotatable about an axis of rotation (A), on which two blades (31) are arranged for conveying, Wherein the blades (31) respectively have inlet regions (311), the inlet regions (311) extending from the inlet edge (310) to the top (S), wherein the wall thickness (d) of the blades (31) is in Its end side ( 350 ) facing away from the carrier body ( 32 ) increases in the inlet region ( 311 ) from the inlet edge ( 310 ) and reaches its maximum at the top (S), In this case, the blade ( 31 ) tapers in the inlet region ( 311 ) in the axial direction from the carrier body ( 32 ) towards the end side ( 350 ) with respect to the wall thickness. A base plate cooperating with such an impeller and a pump for transporting waste water are also proposed.

Description

technical field [0001] The invention relates to a pump for conveying waste water or liquids containing solid matter and to an impeller and a base plate for such a pump according to the preambles of the respective types of independent claims. Background technique [0002] Problems arise when conveying waste water, and especially waste water from households, since these liquids contain fibrous material, rags, textiles or other solid matter, which can easily adhere to the area of ​​the pump and can subsequently lead to a loss of pump efficiency, In particular, the hydraulic efficiency of the pump decreases until the impeller of the pump is completely blocked and causes repairs or often costly maintenance work. Therefore, special measures must be taken when using such pumps in order to effectively prevent clogging. [0003] Usually such pumps are designed as centrifugal pumps with radial or semi-axial impellers, wherein the impeller can have only one blade or also multiple blad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/24F04D7/04F04D29/42
CPCF04D7/04F04D29/242F04D29/4273F04D29/2294F04D29/4293
Inventor K.哈德达德H- P.克莱恩
Owner SULZER MANAGEMENT AG