Elastic blade arranged on top of fan blade, blade provided with elastic blade, and fan

Abstract

The invention relates to an elastic blade arranged on the top of a fan blade, a blade provided with the elastic blade, and a fan. The small elastic blade arranged on the top of the axial flow fan blade is used for reducing the installation interval between the axial flow fan blade and a machine case. The small blade is in the shape of a plate, the longitudinal section of the small blade is L-shaped, the small blade comprises a free section, a connecting section and a bent section, and the bent section faces the suction surface of the axial flow fan blade. By additionally arranging the small blade with certain elasticity on the top of the fan blade, the operation efficiency of the fan, blast capacity and wind pressure are improved due to the fact that the installation interval between the axial flow fan blade and the machine case is reduced. Furthermore, blade damage is avoided even when the small blade with certain elasticity or flexibility collides with or rubs against the machine case. Therefore, the small elastic blade arranged on the top of the axial flow fan blade has the advantage that the operation efficiency of the fan, blast capacity and wind pressure can be improved.

Description

technical field [0001] The invention belongs to the field of machinery, and in particular relates to a fan blade. Background technique [0002] Axial flow fans are generally used for ventilation in factories, warehouses, offices, residences, etc., and can also be used in air coolers (air coolers) and cooling towers. Axial flow fans are mainly composed of impellers, casings, motors and other components. Composition, in large-size axial flow fans such as cooling towers, the tip clearance between the blades of the impeller and the casing is usually relatively large, sometimes up to 30mm, which affects the operating efficiency of the axial flow fan and the air volume and pressure. adverse effects. For axial flow fans, the reduction in operating efficiency due to the large tip clearance may reach more than 5%, and the air volume and pressure will also be significantly reduced. Reducing the blade tip clearance can improve the performance of the fan, but if the clearance is too s...

AI Technical Summary

Problems solved by technology

[0004] The present invention is carried out to solve the problem of reduced operating efficiency and significantly reduced air volume and pressure caused by the large blade tip clearance in the above-mentioned axial flow fan, as well as the blade damage caused by friction between the blade and the casing due to the small blade tip clearance. The purpose is to provide a small elastic blade arranged on the top of the blade of an axial flow fan, and a blade and a fan with elastic leaves

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