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Design Method of Centrifugal Wind Wheel without Volute

A technology of centrifugal wind wheel and design method, which is applied in computer-aided design, calculation, mechanical equipment, etc., can solve problems such as uneven distribution and self-loss, and achieve the effects of reducing noise, eliminating self-loss, and eliminating self-loss areas

Active Publication Date: 2020-12-01
XIAMEN VORK HEALTH IND CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The outer diameter design of almost all conventional centrifugal wind rotors adopts a single-stage outer diameter design. Through aerodynamic simulation analysis, it can be found that for a wind rotor duct system without a volute, the high-speed airflow of the wind rotor is on the air outlet section. The distribution of airflow is uneven, and the airflow will appear self-loss high-speed airflow near the suction port, forming the main source of noise

Method used

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  • Design Method of Centrifugal Wind Wheel without Volute
  • Design Method of Centrifugal Wind Wheel without Volute
  • Design Method of Centrifugal Wind Wheel without Volute

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Embodiment Construction

[0029] Such as Figure 2-Figure 4 As shown, the present invention is a design method of a volute-less centrifugal wind rotor, including the outer diameter design of the wind rotor 1 and the blade shape design of the wind rotor blade (referred to as: wind blade) 11 .

[0030] The outer diameter design of described wind wheel 1 comprises the following steps:

[0031] (1) Calculate the primary outer diameter of the wind rotor 1: R fan 1 = δ*Rad; where: δ is a dimensionless coefficient, 0.72figure 1 shown), R fan 1 is the primary outer diameter of the wind wheel 1;

[0032] (2) Calculate the secondary outer diameter of the wind rotor 1: R fan 2 = ξ*R fan 1; where: R fan 1 is the primary outer diameter of the wind rotor 1, ξ is the dimensionless coefficient, 0.89 image 3 shown.

[0033] The airfoil design of described wind rotor blade 11 comprises the following steps:

[0034]

[0035] In the formula: P is the power of the wind wheel 1, ω is the angular velocity of the wind wh...

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Abstract

The invention discloses a design method of a centrifugal wind wheel without a volute, which includes the design of the outer diameter of the wind wheel and the blade shape design of the blades of the wind wheel. Because the centrifugal wind wheel of the present invention reduces the absolute speed v of the blade by reducing the outer diameter of the blade in the concentration area of ​​the high-speed airflow 绝 =ω·R fan · cosα 2 , so as to eliminate the self-loss area of ​​high-speed airflow and achieve the purpose of noise reduction. The present invention determines the high-speed airflow self-loss area of ​​the wind-wheel-free air duct system through aerodynamic simulation, and proposes a two-stage outer-diameter wind wheel design in a targeted manner. The invention introduces the design of two-stage outer diameter with coefficient ξ, which eliminates the self-loss of high-speed air flow near the air suction port, and can reduce noise without reducing the air volume. The present invention calculates the wind outlet angle α of the best aerodynamic performance through the mathematical derivation of the aerodynamic formula theory 2 and the inlet angle α 1 The combination can achieve the maximum air volume output within the minimum total pressure loss range.

Description

technical field [0001] The invention relates to an air purifier, in particular to a design method of a volute-less centrifugal wind wheel. Background technique [0002] Such as figure 1 As shown, the power mechanism of most household air purifiers generally adopts the volute-less centrifugal wind wheel air duct system, which includes the air duct shell 1' and the wind wheel 2'. The characteristic of the wind wheel air duct system is that it can achieve relative Uniform air outlet and linear air inlet and outlet directions, this structure meets the design requirements of most household air purifiers. Most of the current wind wheel designs are developed based on experience, lacking the guiding design of scientific theories. The outer diameter design of almost all conventional centrifugal wind rotors adopts a single-stage outer diameter design. Through aerodynamic simulation analysis, it can be found that for a wind rotor duct system without a volute, the high-speed airflow o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/28F04D29/30F04D29/66
CPCF04D29/281F04D29/30F04D29/666F05D2260/81G06F30/17G06F2113/08F04D17/06F04D17/08G06F2111/10
Inventor 钟思李煌阳
Owner XIAMEN VORK HEALTH IND CO LTD
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