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Low-noise industrial scavenger fan

A ventilation fan and low-noise technology, which is applied to components of pumping devices for elastic fluids, non-variable pumps, machines/engines, etc., can solve the problem of large air ineffective flow, little improvement of defects, and insignificant effects And other problems, to achieve the effect of improving efficiency, reducing energy loss, and running smoothly

Inactive Publication Date: 2002-05-22
广东正野电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned first type of blade has a slight improvement on the prior art on the small circular arc of the leading edge of the blade, but the improvement is not large and the effect is not obvious. little improvement
The second type of blade is basically a flat plate type, which only solves the problem that the wind is still sent out in the reverse direction, but the efficiency is obviously reduced a lot, and the ineffective flow of air will be greater
The defects of low efficiency and high noise are still not resolved
At present, there is no design of blades, which is based on the principle of aerodynamics to maximize the efficiency of the ventilation fan and increase the working capacity of the ventilation fan; especially to effectively reduce the noise caused by the disturbance of the blades.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0032] An industrial ventilation fan is composed of panel 1, bracket 2, motor box 3, motor 4 and impeller 5. Wherein, the motor 4 device is inside the bottom box 3-1 of the motor box 3, cover the box cover 3-2, the support 2 has 4 support rods, one end of the rod is connected or welded on the motor box 3 with a fastener, and the other One end is also connected or welded on the panel 1 with a fastener; the impeller 5 includes a blade 5-1, a blade frame 5-2 and a shaft sleeve 5-3, such as Figure 12 As shown, there are four blades 5-1, which are respectively fixed on the blade frame 5-2 with fasteners, rivets or welding, and the center of the blade frame 5-2 is fixedly provided with a shaft sleeve 5-3, and the shaft sleeve 5- 3 is tightly sleeved on the transmission shaft that motor 4 stretches out.

[0033] Such as Figure 5 , Image 6 , Figure 9, Figure 10As shown, the arrangement of each blade 5-1 on the 4-blade impeller adopts twisted type, forward-inclined type, and va...

Embodiment 2

[0043] With embodiment 1, only, impeller adopts 5 impellers. Such as Figure 11 Shown, make the integral plastic impeller 5 that 5 blades 5-1 of engineering plastics are connected with the disk of blade holder 5-2, and axle sleeve 5-3 is arranged on the disc center of blade holder 5-2. Blade 5-1 also adopts twisted and forward-leaning designs. The relevant parameters are listed in the table below. All the other are with embodiment 1.

[0044] parameters

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Abstract

The low-noise industrial air-changing fan comprises panel, support, motor box, motor and blade wheel, the blade wheel contains several blades, blade frame and axle sleeve, number of blades is 2-10 blades, every blade is twisted, and arranged in foreraved mode, its blade surface distribution is not symmetrical. The mounting angle alpha on the different primitive-level radius r can be reduced with incrment or r to make blade produce twisted from, the chord b can be increased with increment of r to make blade surface deflect toward outer edge, the front end of blade is a triangle-like flange formed from three circular aras, on its panel a nozzle-shaped collecting device to further reduce noise. Said air-changing fan is high in efficiency, large in flow rate, stable in operation and low in noise, and is applicable to various air-changing fans.

Description

Technical field: [0001] The invention relates to an industrial ventilation fan, in particular to a low-noise industrial ventilation fan. Background technique: [0002] The blades of the existing industrial ventilating fans are flat or slightly arc-shaped, and the leading edge of the blades in the arc is basically a large arc shape, plus a simple panel, a bracket supported on the panel, and motors and other components And composition. Existing this type of ventilation fan is easy to process because of its simple structure; but its disadvantages are also obvious: the shape of the blade is simple and does not conform to the law of air flow, and the work efficiency of energy conversion is low; the noise generated by the friction between the blade and the air is also large. . At present, high noise is a common problem that cannot be effectively solved by existing industrial ventilation fans. The general noise level is 60-80 decibels. [0003] Chinese patent ZL93228964.9. In t...

Claims

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Application Information

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IPC IPC(8): F04D29/34
Inventor 吕植良谭锦光余炳华
Owner 广东正野电器有限公司
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