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Fan blade

A technology of blades and blades, which is applied in the field of blades of axial-flow electric fans, can solve the problems of high noise and large air volume loss of electric fans, and achieve the effects of reducing operating noise, reducing wind loss, and increasing market competitiveness

Inactive Publication Date: 2016-10-12
宁波智宇流体技术有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] The invention provides a fan blade, which can solve the problems of large air volume loss and high noise of the existing electric fan, and at the same time has simple process, low manufacturing cost and easy industrial production

Method used

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Embodiment Construction

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] attached figure 1 In the embodiment, several blades 2 are evenly installed on the fan shaft 1, and the top of the blade 1 is bent toward the suction surface 21 to form a bent portion 23, and the length of the bent portion 23 is from the front edge of the top of the blade 2 to the end of the blade 2. The trailing edge gradually increases. The design of the fan blade is a complicated project. Different working conditions lead to great differences in the design of the blade 2. It is necessary to adjust the curvature, radian, inclination angle, number of blades, and curved edge structure of the blade 2 to improve the air volume and energy efficiency of the fan, and reduce the The noise of fan blades in the system. The present invention does not pay attention to a certain specific design considering blade curvature, radian, inclination ang...

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Abstract

The invention discloses a fan blade, comprising a fan shaft (1) and several blades (2) evenly installed on the fan shaft, the blades (2) have a suction surface (21) and a pressure surface (22), the blade The top of (2) is bent toward the suction surface (21) or the pressure surface (22), forming a bending portion (23). The technical scheme of the present invention has notable features such as small air volume loss and low operating noise, and has the beneficial effects of simple process, low manufacturing cost and easy industrial production.

Description

technical field [0001] The invention relates to a fan blade, in particular to a fan blade of an axial flow electric fan. Background technique [0002] Existing fans generally use blades with smooth curvature and continuous blades. The surface of the entire blade only includes the traditional pressure surface and suction surface. There is no special structure to optimize the blowing flow field, especially at the blade tip of the blade. Due to the pressure surface The pressure difference from the suction side, the airflow will flow from the high pressure side to the low pressure suction side, resulting in pressure loss and loss of air volume. On the other hand, the turbulent flow at the blade tip increases the aerodynamic noise. The application number is "201310514402.9" and the invention patent application titled "Fan blade and electric fan with the blade" provides a way to reduce the loss of air volume by providing a vortex blocking part at the tip of the blade to block the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/38F04D29/66
CPCF04D29/386F04D29/388F04D29/663F05D2240/305F05D2240/306
Inventor 郭叙邱炜
Owner 宁波智宇流体技术有限公司
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