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Axial-flow blower fan impeller

A fan impeller and axial flow technology, applied to mechanical equipment, non-variable pumps, machines/engines, etc., can solve problems such as broken blades or impeller damage, fatigue cracks of fan blades, and outage of generator sets, etc., to achieve extended Operating life, reduction of probability of fatigue cracks or fractures, effect of increasing natural frequency

Inactive Publication Date: 2012-01-18
SHANDONG ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Large-capacity power station axial flow fans generally have high speed, and the fan blades are long and wide. If the gas flowing through it is turbulent or eddy, or there are electromechanical disturbance factors during operation, the fan blades are prone to fatigue cracks, or the resonance phenomenon of the blades. In severe cases, broken blades or impeller damage faults or accidents occur, resulting in the shutdown of the generator set, etc.

Method used

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  • Axial-flow blower fan impeller
  • Axial-flow blower fan impeller
  • Axial-flow blower fan impeller

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] An axial-flow fan impeller, including a transmission shaft 3, an impeller hub 4 and several blades 1, the transmission shaft 3 is connected to the impeller hub 4, the blades 1 are arranged around the impeller hub 4, and a reinforcing ring 2, such as figure 1 , figure 2 As shown, among them, there are several grooves on the reinforcement ring 2, and several blades 1 are connected with the reinforcement ring 2 by embedding the grooves, and the blade 1 is improved from a cantilever structure to an integrally connected ring structure (this method is preferred);

[0017] Another implementation method is: the blade 1 is provided with a groove, and the reinforcing ring 2 is connected to several blades 1 by being embedded in the groove, so that the blade 1 is improved from a cantilever structure to an integrally connected ring structure.

[0018] There is another impl...

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PUM

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Abstract

The invention discloses an axial-flow blower fan impeller, which comprises a transmission shaft, an impeller hub and a plurality of blades, and further comprises a strengthening ring, wherein the transmission shaft is connected with the impeller hub; the blades are arranged on the periphery of the impeller hub; a plurality of grooves are arranged on the strengthening ring; the blades are connected with the strengthening ring by being embedded in the grooves; or the grooves are arranged on the blades, and the strengthening ring is connected with the blades by being embedded in the grooves. The invention discloses another embodiment as follows: the axial-flow blower fan impeller comprises a transmission shaft, an impeller hub and a plurality of blades, wherein the transmission shaft is connected with the impeller hub; the blades are arranged on the periphery of the impeller hub, adjacent blades are connected through a plurality of rib-stiffened plates, and the rib-stiffened plates are arranged in an annular way to constitute a strengthening ring. According to the axial-flow blower fan impeller disclosed by the invention, the structural strength of the blades and an impeller is increased, the fatigue strength of the blade resisting pulse airflow is increased, the rate of fatigue crack or breakage of the blades is reduced, and the operating life of a blower fan is prolonged.

Description

technical field [0001] The invention relates to an axial flow fan impeller. Background technique [0002] At present, most large-scale conventional coal-fired power plant boilers use axial flow fans as the air required for fuel combustion to be sent into the boiler furnace, and the flue gas formed by fuel combustion is sucked by the axial flow fans to the chimney to the atmosphere. It can be seen that fans are the main auxiliary equipment of power plant boilers, and their safe operation is closely related to the normal power generation of generator sets. Large-capacity power station axial flow fans generally have high speed, and the fan blades are long and wide. If the gas flowing through it is turbulent or eddy, or there are electromechanical disturbance factors during operation, the fan blades are prone to fatigue cracks, or the resonance phenomenon of the blades. In severe cases, broken blades or impeller damage faults or accidents will occur, resulting in the shutdown o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/32
Inventor 王家新
Owner SHANDONG ELECTRIC POWER RES INST
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