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Design method of double helix mixed flow pump impeller

A design method and technology of mixed-flow pumps, which are applied to components, pumps, and pump components of pumping devices for elastic fluids, and can solve problems such as vibration and noise, increased instability, and uneven mass distribution of the pump body , achieve the effect of reducing vibration and noise and improving the balance effect

Active Publication Date: 2013-12-25
JIANGSU GUOQUAN PUMP MFG CO LTD
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Due to the structural characteristics of the single-screw vane mixed-flow pump, its shape is asymmetrical, and its mass distribution is uneven.
When the impeller rotates, an unbalanced centrifugal inertial force is generated, which causes the pump body to vibrate and make noise, and increases the instability of the pump during operation.

Method used

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  • Design method of double helix mixed flow pump impeller
  • Design method of double helix mixed flow pump impeller
  • Design method of double helix mixed flow pump impeller

Examples

Experimental program
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Embodiment Construction

[0051] figure 1 and figure 2 Together determine the impeller shape for this embodiment. It is different from the common mixed-flow pump impeller. The impeller inlet is a spiral forward type. The inlet side (13) looks like a sickle shape. The blades (3) spiral upward along the hub (4), and the number of blades (3) is only Two, symmetrically arranged blades have a good balancing effect. And it has a large flow channel, which has good passing performance and non-destructive properties. The present invention determines the impeller inlet diameter D through the following relations 1 (1), impeller hub diameter d h (2), the maximum outer diameter of the impeller D 20 (6), the outlet edge inclination angle α 2 (7), outlet side width b 2 (8), the axial length of the impeller L (9) and the minimum outer diameter of the impeller D 2h (10).

[0052] D 1 = K 0 Q ...

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Abstract

The invention provides a design method of a double helix mixed flow pump impeller. The method is characterized by providing the design formulas of such main geometric parameters of the impeller as impeller inlet diameter D1, impeller hub diameter dh, maximum impeller outer diameter D20, outlet edge slant angle alpha 2, minimum impeller outer diameter D2h, outlet edge width b2 and impeller axial length L. The design method has the following beneficial effects: not only does the impeller designed by the method meet the requirement of sewage treatment, but also the impeller balance effect can be improved, the vibration and noises during pump operation can be reduced, and the flow capacity and non-destruction and non-winding properties of the mixed flow pump are improved; and therefore the helix mixed flow pump applying the impeller is especially suitable for the sewage treatment industry.

Description

technical field [0001] The invention relates to a design method of a mixed-flow pump impeller, in particular to a design method of a double-screw mixed-flow pump impeller. Background technique [0002] The structure and performance of the mixed flow pump are between the axial flow pump and the centrifugal pump. It is an ideal pump type that absorbs the advantages of the centrifugal pump and the axial flow pump and compensates for the shortcomings of the two aspects. At present, the hydraulic design of mixed-flow pumps mostly adopts the design method of centrifugal pumps, that is, the velocity coefficient method. Cylindrical blades or twisted blades are used, which have strong flow capacity. However, if sewage pumping stations are used, the water quality is complicated and there is a lot of sediment. There are many sundries, which will easily cause the impeller blades to be entangled with sundries, blockage, deformation of the outer mechanical seal, failure of the mechanical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/18
Inventor 朱荣生杨爱玲
Owner JIANGSU GUOQUAN PUMP MFG CO LTD
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