Design method for non-volute centrifugal wind wheel

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

Active Publication Date: 2019-09-06
XIAMEN VORK HEALTH IND CO LTD
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  • 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 v...

Method used

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  • Design method for non-volute centrifugal wind wheel
  • Design method for non-volute centrifugal wind wheel
  • Design method for non-volute centrifugal wind wheel

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Embodiment Construction

[0029] like Figure 2-Figure 4 As shown, the present invention is a design method of a volute-less centrifugal wind rotor, including the design of the outer diameter of the wind rotor and the blade shape design of the blades of the wind rotor.

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

[0031] (1) Calculate the primary outer diameter of the wind rotor: R fan 1 =δ*R ad ; where: δ is a dimensionless coefficient, 0.72ad is the inner diameter of the air duct, R fan 1 is the primary outer diameter of the wind rotor;

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

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

[0034]

[0035] In the formula: P is the power of the wind rotor, ω is the...

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Abstract

The invention discloses a design method for a non-volute centrifugal wind wheel. The design method includes outer diameter design of the wind wheel and blade profile design of a wind wheel blade. Dueto the fact that the absolute speed v which is equal to omega*Rfan*cosalpha2 of the blade is reduced by reducing the outer diameter of the blade in a high-speed airflow concentrated area in the centrifugal wind wheel, a self-loss area of high-speed airflow is eliminated, and the purpose of noise reduction is achieved. By means of the design method, the self-loss area of the high-speed airflow of an air way system of the non-volute wind wheel is determined through pneumatics simulation, and two-stage outer diameter type wind wheel design is put forwards in a targeted manner. The second-level outer diameter design of the coefficient epsilon is introduced, the self loss of the high-speed airflow near an air suction opening is eliminated, and the noise can be reduced on the premise that the air volume is not reduced. By means of the design method for the non-volute centrifugal wind wheel, due to mathematical derivation on a pneumatic formula theory, the combination of an air outlet angle alpha 2 and the air inlet angle alpha 1 of the best pneumatic performance is calculated, and the maximum air volume output is achieved in 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] like 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 of t...

Claims

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Application Information

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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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