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Centrifugal fan blade

A centrifugal fan and blade technology, applied in the field of power machinery, can solve the problems of large separation dissipation area, impact loss, etc., achieve high pressure rise and efficiency, performance improvement, and reduce air separation and energy loss.

Inactive Publication Date: 2011-08-31
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since this kind of straight blade is difficult to conform to the variable curvature motion during the fluid rotation process, especially in the case of ultra-low specific speed or small flow rate, it is easy to form a large separation dissipation area, and the contact between the moving fluid and the straight blade is relatively rigid, so Easy to form a large impact loss

Method used

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Embodiment Construction

[0026] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0027] Such as figure 1 with figure 2 As shown, the blade of this embodiment is located in the fan, and the blade includes: a leading edge 1, a pressure surface 2, a suction surface 3 and a trailing edge 4, wherein: the leading edge 1 is tangent to the inner diameter 5 of the fan, and the trailing edge 4 Located on the outer diameter 6 of the fan, one end of the pressure surface 2 and one end of the suction surface 3 are respectively connected to the two ends of the leading edge 1, and the other end of the pressure surface 2 and the other end of the suction surface 3 are respectively connected to the two ends of ...

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Abstract

The invention relates to a centrifugal fan blade, belonging to the technical field of fluid machinery. The blade comprises a front edge, a pressure surface, a suction surface and a rear edge, wherein the front edge is tangent to the inner diameter of a fan; the rear edge is positioned on the outer diameter of the fan; one end of the pressure surface and one end of the suction surface are respectively connected with the two ends of the front edge, and the other ends of the pressure surface and the suction surface are respectively connected with the two ends of the rear edge; and the blade is formed by the area surrounded by the front edge, the pressure surface, the suction surface and the rear edge. The blade adopts variable thickness forward bending structure, and the pressure surface andthe suction surface of blade are controlled by high-order bezier curve, so that higher pressure rise and working efficiency can be ensured under the condition of low flow rate, the situation of a flow channel is improved, and the energy loss is reduced.

Description

technical field [0001] The invention relates to a blade in the technical field of power machinery, in particular to a centrifugal fan blade. Background technique [0002] The ultra-low specific speed centrifugal fan with a specific speed less than 0.25 occupies a very important position in the industrial system, and is a key product in the drying cycle system of food production, chemical fiber manufacturing and wood processing industries. As the core component of the working performance of this type of fan, the blade has an important impact on the internal flow (pressure velocity distribution) and external characteristic curve of the impeller. The optimization of its structure and performance is of great significance to saving energy, reducing costs, and improving efficiency. [0003] During the operation of the ultra-low specific speed centrifugal fan, due to the need to ensure high pressure rise and small flow during operation, the outlet width of the fan blade (b 2 ) and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/30
Inventor 张斌王彤谷传纲杨波
Owner SHANGHAI JIAOTONG UNIV
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