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Axial flow impeller with splitter blades

A splitter vane and axial flow impeller technology, which is applied to parts of pumping devices for elastic fluids, non-variable pumps, pump components, etc., can solve the problems of complex blade structure and unfavorable processing and manufacturing, and achieve improved aerodynamics. performance, disturbance reduction, and the effect of expanding the stable operating range

Pending Publication Date: 2021-11-16
FOSHAN CITY NANHAI POPULA FAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently commonly used passive flow control technologies, such as blade sweeping technology, winglet structure at the top of the blade, special shape of the leading and trailing edges of the blade, etc., can control the vortex and wake flow structure inside the impeller, but the blade structure becomes complicated, which is not conducive to processing manufacture

Method used

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  • Axial flow impeller with splitter blades
  • Axial flow impeller with splitter blades
  • Axial flow impeller with splitter blades

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The diameter of the large blade in this embodiment is 300 mm, the number of blades is 6, and the number of splitter blades is 6. The vane installation angle of each section along the height direction of the splitter blade changes in the form of a quadratic function, and the coefficient of the quadratic function is given by The different installation angles are determined by the values ​​of the three sections of leaf height 0%, leaf height 50% and leaf height 100%. The values ​​are: 56.76°, 52.4° and 48.11°; the reduction factor is 0.1, and the height coefficient is 0.28, the axial position is a 25mm translation along the Z axis, and the circumferential position is a 15° rotation around the Z axis.

Embodiment 2

[0048] The diameter of the large blade in this embodiment is 300 mm, the number of blades is 6, and the number of splitter blades is 6. The vane installation angle of each section along the height direction of the splitter blade changes in the form of a quadratic function, and the coefficient of the quadratic function is given by The different installation angles are determined by the values ​​of the three sections of leaf height 0%, leaf height 50% and leaf height 100%. The values ​​are: 56.76°, 52.4° and 48.11°; the reduction factor is 0.5, and the height coefficient is 0.28, the axial position is a 25mm translation along the Z axis, and the circumferential position is a 30° rotation around the Z axis.

Embodiment 3

[0050] The diameter of the large blade in this embodiment is 300 mm, the number of blades is 6, and the number of splitter blades is 6. The vane installation angle of each section along the height direction of the splitter blade changes in the form of a quadratic function, and the coefficient of the quadratic function is given by The different installation angles are determined by the values ​​of the three sections of leaf height 0%, leaf height 50% and leaf height 100%. The values ​​are: 56.76°, 46.1° and 35.11°; the reduction factor is 0.5, and the height coefficient is 0.70, the axial position is a 25mm translation along the Z axis, and the circumferential position is a 30° rotation around the Z axis.

[0051] Image 6 with Figure 7 It is the flow-total pressure efficiency curve and the flow-total pressure curve of the prototype (that is, without splitter vanes) and embodiments 1, 2, and 3. When the flow rate is less than 0.7kg / s, the total pressure efficiency and total ...

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Abstract

The invention belongs to the field of fans, and particularly discloses an axial flow impeller with splitter blades. The splitter blades are installed between axial flow blades of the axial flow impeller, and blade roots of the splitter blades are connected with a hub of an axial flow fan. The splitter blades are similar to the axial flow blades in shape, the height of the splitter blades is obtained by multiplying the height of the axial flow blades by a height coefficient sigma, and the section of the splitter blades is obtained by multiplying the section of the axial flow blades at the same height by a reduction coefficient tau, wherein the height coefficient sigma ranges from 0.1 to 0.6, and the reduction coefficient tau ranges from 0.3 to 0.7. According to the axial flow impeller, through the improved design of given key parameters, the axial speed near the blade roots can be effectively increased, the area of a tail edge low-speed region is reduced, tail edge separation is weakened, low-energy fluid near an end wall is taken away, the development of passage vortexes and corner separation vortexes is restrained, and therefore the aerodynamic performance of the axial flow fan is improved.

Description

technical field [0001] The invention belongs to the field of fans, and more specifically relates to an axial flow impeller with splitter blades. Background technique [0002] Axial fans occupy a very important position in ventilation machinery because of their simple structure and large flow. Axial flow fans can be used in traditional industries such as metallurgy, chemical industry, light industry, food, etc., and with the continuous construction of cities, the demand for axial flow fans in high-rise buildings and subway passages is also increasing. Especially with the emergence of new industries and new fields, higher requirements are put forward for the performance of axial flow fans. At present, axial flow fans generally have problems such as low efficiency and high noise, and consume a lot of energy during operation, which affects the surrounding environment, greatly wastes energy, and is not conducive to sustainable development. [0003] The axial flow fan has a simp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/32F04D29/38F04D29/66
CPCF04D29/327F04D29/384F04D29/667F04D29/666
Inventor 唐文锋王军徐永森李志昂林志良王威
Owner FOSHAN CITY NANHAI POPULA FAN
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