Axial-flow fan blade with high noise elimination degree

Abstract

The invention discloses an axial-flow fan blade with high noise elimination degree. The axial-flow fan blade comprises a hub and a blade arranged on the side part of the hub, wherein the middle part of the tail edge of the blade is equipped with a V-shaped groove which extends towards the central area of the blade; length of the side line of the tail edge is L; a starting point, on the tail edge, of the V-shaped groove is positioned at the 0.55-0.64L length part of the side line of the tail edge; a terminal point, on the tail edge, of the V-shaped groove is positioned at the 0.7-0.78L length part of the side line of the tail edge; depth of the V-shaped groove is 0.4-0.65L; a plurality of micro noise elimination holes are densely formed in blades at the two sides of the V-shaped groove; and hole diameter of the micro noise elimination holes is 0.4-0.7 mm. The V-shaped groove is formed in the middle part of the tail edge of the blade, the starting point, on the tail edge of the blade, of the V-shaped groove and groove depth are selected, and the dense micro noise elimination holes are additionally formed, so that airflow can be guided to quickly circulate to weaken airflow turbulence on the tail edge of the blade, and therefore, noise degree is reduced, and noise exposure is reduced in case of ensuring air output loss of the blade to be not great.

Description

technical field [0001] The invention relates to the technical field of axial flow fan blades, in particular to an axial flow fan blade with high noise elimination degree. Background technique [0002] Axial flow fan blades are widely used in daily life. The axial flow refers to the air flow that flows in the same direction as the axis of the fan blade. For example, electric fans and air conditioner fans are fans that operate in an axial flow mode. Axial flow fans with axial flow blades are usually used in occasions with high flow requirements and low pressure requirements, and are widely used in the field of air conditioning. [0003] Common axial flow blades are mainly composed of a hub and multiple blades arranged around the hub. Although the structure is simple, the data parameters of the detailed structures of the axial flow blades are very high, which affects the operation and noise of the axial flow blades. Control has a big impact. In the related art, the detailed d...

AI Technical Summary

Problems solved by technology

[0003] Common axial flow blades are mainly composed of a hub and multiple blades arranged around the hub. Although the structure is simple, the data parameters of the detailed structures of the axial flow blades are very high, which affects the operation and noise of the axial flow blades. Control has a big impact

In related technologies, the detailed design of axial flow fan blades has been continuously enhanced, but the design of the low noise performance of the blades needs to be further improved

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