Fan blade structure of axial fan

Abstract

The invention relates to a fan blade structure of an axial fan. The fan blade structure comprises a hub and a plurality of fan blades distributed on the periphery of the hub and with the same shape and is characterized in that the fan blades have an LS airfoil profile characteristic; each of the fan blades comprises five characteristic cross sections; the characteristic cross section mounting angles of each of the five characteristic cross sections are sequentially 27.74 degrees, 25.61 degrees, 21.61 degrees, 20.70 degrees and 20.33 degrees; the stacking line of the gravity centers of the fanblades is positioned in a circumferential plane perpendicular to the axial lead of the hub; the circumferential plane is the X-Y plane; the governing equation of the stacking line of the gravity centers is y=112.319X<3>+2.0627X<2>-0.0081X, X is the coordinates of the gravity center in the X direction; Y is the coordinates of the gravity center in the Y direction; the relative thicknesses of all characteristic cross sections on the same fan blade are in nonlinear distribution from the blade root to the blade tip, and the value of the relative thicknesses is 0.03-0.07.

Description

technical field [0001] The invention relates to a fan, in particular to a blade structure of an axial flow fan. Background technique [0002] The engine cooling fan is an important part of the vehicle cooling system. The performance of the fan directly affects the heat dissipation effect of the engine, which in turn affects the performance of the engine. If the fan is not selected properly, it will lead to insufficient or excessive cooling of the engine, resulting in deterioration of the working environment of the engine, which will affect the performance and service life of the engine. In addition, the power consumed by the fan accounts for about 5% to 8% of the output power of the engine. Under the trend of pursuing environmental protection and low energy consumption, the effective efficiency of the fan has also attracted increasing attention. In the traditional fan matching, technicians often design and modify through the experience of technicians. The fans selected in t...

AI Technical Summary

Problems solved by technology

In the traditional fan matching, technicians often design and modify through the experience of technicians. The fans selected in this way can only meet the cooling requirements of the system, and the work efficiency and efficiency of these axial fans are generally low. It cannot meet the requirements of high air volume, high air pressure, and low noise, and urgently needs improvement

If the area and length of the fan blades are increased blindly, not only cannot provide enough air volume for the cooling fan to ensure high efficiency, but also gradually weaken the strength of the blades. When the air volume is increased, the blades are also easily damaged, and Even if a fan with this structure can meet the requirements of air volume and wind pressure, it is difficult to meet the requirements in terms of efficiency, noise, and compact structure, and the development cycle is long

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