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A centrifugal fan blade with a slotted structure

A centrifugal fan and ventilator technology, applied in mechanical equipment, machines/engines, liquid fuel engines, etc., can solve the problems of complex impeller channel flow, poor fan performance, large vortex noise, etc., to widen the efficient operation area, improve Efficiency and pressure ratio, the effect of improving flow field conditions

Active Publication Date: 2022-03-15
TAIZHOU UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

The flow in the impeller channel of the centrifugal fan is very complicated, and the flow separation phenomenon is easy to occur in the impeller channel under the condition of lower than the rated flow rate, especially the separation phenomenon near the suction surface of the blade trailing edge is serious, which brings adverse effects on the performance of the fan. Influence, the efficiency will drop, and may generate large vortex noise

Method used

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  • A centrifugal fan blade with a slotted structure
  • A centrifugal fan blade with a slotted structure
  • A centrifugal fan blade with a slotted structure

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] Such as Figure 1 and Figure II As shown, the embodiment of the present invention includes several groups of blade assemblies located in the impeller 3 of the ventilator, each group of blade assemblies is arranged in an annular array at the center of the impeller 3, and each group of blade assemblies includes a long blade 1 and a short blade assembly. Blade 2. The diameter of the impeller in this embodiment is D, and other main parameters are as Figure three As shown, it includes the length a and thickness b of the long blade, the length c of the short blade and the thickness d of the trailing edge, the gap width e, and the overlapping length f of the long and short blades. The included angle formed by the outlet tangent is the deflection angle g of the short blade, and the blade outlet is at the trailing edge of the short blade. This embod...

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Abstract

The invention discloses a centrifugal fan blade with slots. The invention adopts the slotting technology to optimize the original model blade. The long blade part of the slotted blade is flat plate, and the short blade part is an airfoil. The main parameters include the length, width and thickness of the long blade, and the length, width and thickness of the short blade. , the gap width, the coincidence length of long and short blades, and the deflection angle of short blades. Among them, the gap width, the coincidence length of long and short blades, and the deflection angle of short blades have a greater impact on fan performance. When the short blade reverses the angle, a jet flow will be formed at the gap, which makes the thickness of the boundary layer on the suction side of the short blade thinner and inhibits separation. The slotting technology can not only improve the efficiency and pressure ratio, but also broaden the efficient operation area of ​​the fan, reduce noise, and improve the adhesion and wear of the blades during the transportation process of the dusty and wet airflow.

Description

technical field [0001] The invention belongs to the field of fan equipment and relates to a centrifugal fan, in particular to a centrifugal fan blade with a slit structure. Background technique [0002] Impeller machinery occupies an important position in the national economy, especially in power, energy, chemical industry, aviation, metallurgy and other professional fields and has been widely used. Turbo machinery also consumes a lot of electricity while working. The energy problem is also a prominent problem in my country's economic development, which is mainly manifested in the low energy utilization rate. There are many reasons for this problem, and one of the main factors is the efficiency of the equipment itself. In response to the increasingly tense energy situation, turbomachinery with high design efficiency, wide range of working conditions, and good operating safety has become the unremitting goal of workers in related fields. With the expansion of modern industr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/28F04D29/30F04D29/66
CPCF04D29/281F04D29/30F04D29/666F04D29/667
Inventor 李哲弘叶信学邢慧芬罗平刘文飞陈子云王正初
Owner TAIZHOU UNIV
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