Optimal design method of cross-flow fan based on orthogonal test

A cross-flow fan and optimized design technology, which is applied to mechanical equipment, components of pumping devices for elastic fluids, machines/engines, etc., can solve the problem of backward technology of cross-flow fans, poor environmental adaptability, and insufficient air volume Questions such as requirements

Inactive Publication Date: 2012-02-15
CHANGSHA UNIVERSITY
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Problems solved by technology

However, due to the current domestic products of this type are basically surveying and mapping imitations, the technical level of cross-flow fans is backward, and there are problems such as low efficiency, high noise, poor environmental adaptability, and air volume that cannot meet the requirements, which makes the quality and reliability of this type of products Compared with similar foreign products, there is still a certain gap

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  • Optimal design method of cross-flow fan based on orthogonal test
  • Optimal design method of cross-flow fan based on orthogonal test
  • Optimal design method of cross-flow fan based on orthogonal test

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Embodiment Construction

[0026] The specific implementation manner of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] figure 1 It is a three-dimensional schematic diagram of the whole machine of the cross-flow fan of the present invention. The fan blades adopt twisted blades 1, and the twisted blades 1 are distributed equidistantly along the circumferential direction of the impeller. In the axial length direction of the entire cross-flow fan, each blade is twisted The angle is the blade twist angle. The motor 4 drives the impeller 5 to rotate, 2 is a volute tongue, and 3 is a volute.

[0028] Such as figure 2 As shown, D is the outer diameter of the impeller (unit mm), d is the inner diameter of the impeller (unit mm), α is the inner circumference angle of the blade (unit °), β is the outer circumference angle of the blade (unit °), ε c is the clearance of the volute (in mm), ε t is the volute tongue gap (in mm), n is the num...

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Abstract

The invention provides an optimal design method of a cross-flow fan based on an orthogonal test, comprising the following steps of: with a volute gap, a volute tongue gap, a circumferential angle inside blades, a circumferential angle outside the blades, the number of blades, the ratio of an inside diameter and an outside diameter of an impeller, a torsion angle of the blades and the like as simulated optimal structural parameters, i.e., test factors, taking n different numerical values, i.e., test levels from each structural parameter; computing performance indexes (air quantity, frequency, noise and the like) of the cross-flow fan under such a group of structural parameters by using a computational fluid dynamics (CFD) method for each test by using an orthogonal table Lp (p<=30); and finding a group of optimal structural parameters according to performance index parameters and corresponding weights. If the requirement for performance indexes is very high, n' different test levels for the computed optimal structural parameters can be taken near the value aiming at each test level of the test factors, and then the performance indexes are computed repeatedly by using an orthogonal table Lq to obtain a group of more optimal structural parameters. The method is simple and feasible, low in cost and short in time, and the designed product has good performance.

Description

technical field [0001] The invention belongs to a design method of a cross-flow fan, in particular to an optimal design method of a cross-flow fan based on an orthogonal test. Background technique [0002] The cross-flow fan, also known as the cross-flow fan, was first proposed by the French engineer Mortier in 1892. The impeller of the cross-flow fan is multi-leaf, long cylindrical, with forward multi-wing blades. Cross-flow fans are widely used in household appliances (such as electric fireplaces, heaters, air conditioners, air fresheners, refrigerators and cooling fans, etc.) and industrial equipment. At present, the annual demand for this product is very large at home and abroad. . With the improvement of people's living standards and the development of technology, this product is developing in the direction of high efficiency, low consumption, and low noise. According to the statistics of the China Fan Association, my country needs to import a large number of cross-fl...

Claims

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Application Information

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IPC IPC(8): F04D29/26
Inventor 庞佑霞梁亮唐勇张昊朱宗铭许焰刘辉
Owner CHANGSHA UNIVERSITY
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