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Staggered backward centrifugal wind wheel

A centrifugal wind wheel, staggered technology, applied in non-variable pumps, components of pumping devices for elastic fluids, machines/engines, etc., can solve the problem of the impeller outlet flow field of the backward centrifugal wind wheel Uniformity, reducing the matching between the impeller and the subsequent components, increasing the internal flow loss of the impeller, etc., to achieve the effect of improving the outlet airflow, improving the flow uniformity, and improving the efficiency of the wind wheel

Pending Publication Date: 2021-01-05
GUANGDONG SUNWILL PRECISING PLASITC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practice, it is found that there is a strong secondary flow between the disc and the wheel cover, and between the pressure surface and the suction surface of the backward centrifugal wind rotor, resulting in a very uneven flow field at the impeller outlet of the backward centrifugal wind rotor. , resulting in a distinct wake structure
The wake structure increases the flow loss inside the impeller, reduces the efficiency, and reduces the matching between the impeller and the rear components

Method used

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  • Staggered backward centrifugal wind wheel
  • Staggered backward centrifugal wind wheel

Examples

Experimental program
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Effect test

Embodiment 1

[0018]In Embodiment 1, the number of the inner ring blades 111 and the outer ring blades 121 are the same, which further ensures the working stability of the backward centrifugal wind wheel.

[0019]In this embodiment, optionally, the number of blades of the inner ring blade 111 and the outer ring blade 121 ranges from 7 to 20.

[0020]In this embodiment, optionally, the staggered angle between the inner ring blade 111 and the outer ring blade 121 is W, and the range of W is 1°-20°, so that the staggered arrangement between the inner ring blade 111 and the outer ring blade 121 The size of the gap is more reasonable, and the airflow effect is further improved.

Embodiment 2

[0021]In Embodiment 2, the diameter of the wheel 100 is D1, the inner diameter of the inner ring blade 111 is D2, and the diameter of the circular dividing line is D3, where the relationship between D1, D2, and D3 satisfies D1>D3>D2, while D1, The value range of D2 and D3 satisfies D3=KD1+D2, and the value range of K is 0.4 to 0.6, which further ensures the efficiency of the wind turbine.

Embodiment 3

[0022]In Embodiment 3, the blade thickness of the inner ring blade 111 and the outer ring blade 121 are the same, which further ensures the working stability of the backward centrifugal wind wheel.

[0023]In this embodiment, optionally, the heights of the inner ring blades 111 and the outer ring blades 121 are also the same.

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Abstract

The invention discloses a staggered backward centrifugal wind wheel. The staggered backward centrifugal wind wheel comprises a wheel disc, wherein the wheel disc comprises an inner ring part and an outer ring part, the boundary between the inner ring part and the outer ring part is a circular boundary, inner ring blades are arranged at the inner ring part, and outer ring blades are arranged at theouter ring part; and the positions of the inner ring blades and the outer ring blades are staggered. The inner ring blades and the outer ring blades of the wheel disc are arranged in a staggered modein the inner layer and the outer layer, and by means of the pressure difference between the pressure surface and the suction surface, high-speed airflow on the pressure surface is sprayed out of a staggered blade crack runner to blow away low-speed airflow on the side of the suction surface so as to weaken separation, and therefore, the influence of suction surface boundary separation of an impeller and an outlet wake structure on a flow field is reduced.

Description

Technical field[0001]The invention relates to the technical field of centrifugal wind wheels, in particular to a backward centrifugal wind wheel with improved blade arrangement.Background technique[0002]The backward centrifugal wind wheel includes at least a disc, blades, or a disc, wheel cover and blades. In practice, it has been found that there is a strong secondary flow between the disc and wheel cover, and between the pressure surface and the suction surface of the backward centrifugal wind wheel, resulting in a very uneven flow field at the impeller outlet of the backward centrifugal wind wheel. , Resulting in an obvious wake structure. The wake structure increases the flow loss inside the impeller, reduces the efficiency, and reduces the matching between the impeller and its subsequent components. Therefore, the exit jet-wake structure actually has a great influence on the performance of the centrifugal fan.Summary of the invention[0003]In order to overcome the shortcomings o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/28F04D29/30F04D29/66
CPCF04D29/281F04D29/30F04D29/288F04D29/666F04D29/667
Inventor 叶涛覃万翔韦宏茂罗伟乐王汉波程守炤罗华吴思铭
Owner GUANGDONG SUNWILL PRECISING PLASITC CO LTD
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