Multiple surge-reducing ventilating vane

A fan and blade technology, which is applied to pump elements, components of pumping devices for elastic fluids, non-variable-capacity pumps, etc., can solve problems such as loud noise, affecting the working environment, and noise pollution.

Inactive Publication Date: 2008-02-20
SUZHOU HUASHENG FAN PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Under the joint action of electromagnetic noise, mechanical noise, and aerodynamic noise, the current ventilator has relatively large noise; especially aerodynamic rotating noise and aerodynamic vortex noise account for a relatively large proportion, which is likely to cause noise pollution and affect the working environment

Method used

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Examples

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Embodiment Construction

[0007] In specific implementation, when the flow around the blade is not good, one or more small slits are opened parallel to the axial direction at the non-working surface of the blade near the beginning of the off-body vortex, so that a part of the high-pressure air flow on the pressure side blows to the non-working surface through the small slits. On the working face, blow away the detached vortex, improve the flow, and reduce the vortex noise.

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PUM

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Abstract

The invention provides a ventilator blade, which is designed to be bend backward in shape and a small opening is opened in the middle of the blade to from a staggered diversion slot and the outlet edge of the blade or the edge of a volute tongue is inclined with an axis; in this way, the ventilator can lead to the impulse flow acted on the volute tongue to stagger, which reduces the impulsive force on the volute tongue and decreases the rotational noise; furthermore, a part of the high pressure draught at the pressure side is blown to the non-working face through small slots, which blows away the detaching vortices, improves the flow and decreases the vortices noise.

Description

technical field [0001] The invention relates to a ventilator technology, especially the blade technology of the ventilator. Background technique [0002] Under the joint action of electromagnetic noise, mechanical noise, and aerodynamic noise, the current ventilator has relatively large noise; especially aerodynamic rotating noise and aerodynamic vortex noise account for a relatively large proportion, which is likely to cause noise pollution and affect the working environment. Contents of the invention [0003] The invention provides a fan blade with low noise. [0004] For realizing the above object, technical scheme of the present invention is: [0005] A blade of a ventilator is characterized in that the blade is made into a backward curved shape, a small opening is opened in the middle of the blade to form a staggered diversion seam, and the air outlet edge of the blade or the edge line of the volute tongue is inclined to the axis. [0006] In this way, the fan can s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/30F04D29/38
Inventor 沈国荣
Owner SUZHOU HUASHENG FAN PLANT
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