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Radial annular inlet/outlet air noise eliminating device

A muffler, annular technology, applied in the components of pumping devices for elastic fluids, non-variable displacement pumps, machines/engines, etc. The effect of improvement and optimization of the runner structure

Inactive Publication Date: 2015-05-06
PINGAN ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, the current collector and the muffler are manufactured separately, and then assembled, the processing technology is complicated

Method used

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  • Radial annular inlet/outlet air noise eliminating device
  • Radial annular inlet/outlet air noise eliminating device
  • Radial annular inlet/outlet air noise eliminating device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1, such as figure 1 , is a schematic diagram of the forward cross-sectional structure of the radial annular inlet (outlet) wind muffler device according to the present invention. It designs the muffler and current collector at the front or back of the main engine into an integrated structure. The front muffler and deflector arc plate is composed of the front sealing plate 1, the straight cylinder body 2 and the front deflector plate 3. The cavity surrounded by it Filled with sound-absorbing material. The inner muffler cylinder is composed of the inner muffler cone body 7 and the rear sealing plate 11, and the cavity surrounded by it is filled with muffler material. The outer muffler is composed of the rear deflector 5 , the outer muffler cone 6 and the outer shell 8 , and the cavity surrounded by it is filled with muffler material. The three mufflers form a tapered area, and the geometric shape smoothly transitions from a radial ring to an axial ring airflow c...

Embodiment 2

[0036] Example 2, such as Figure 6 , is a frontal cross-sectional structural schematic diagram of the second embodiment of the radial annular inlet (outlet) wind muffler device according to the present invention. For more than one bend, when the noise propagates outward along the flow channel, there are multiple "barriers" to block it, and the noise reduction effect is better. All the other are with embodiment 1.

Embodiment 3

[0037] Example 3, such as Figure 8 , is a schematic view of the front sectional structure of the third embodiment of the present invention, the air inlet (outlet) direction is designed in the axial direction, however, the air inlet (outlet) flow channel has a tapered (expanded) area, geometric The shape is a structural feature that the radial ring is smoothly transitioned to the axial direction.

[0038] Such as Figure 9 , is a left-view outline structure diagram of the third embodiment of the present invention, the protective net is a ring-shaped structure, and is arranged in the axial plane where the air inlet is located. All the other are the same as above-mentioned embodiment.

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Abstract

A radial annular inlet / outlet air noise eliminating device mainly solves the technical problems that an existing noise eliminating device is not ideal in noise reduction effect and the like. According to the technical scheme, the radial annular inlet / outlet air noise eliminating device is characterized by comprising a flow guiding disk, an outer noise eliminating cone cylinder and an inner noise eliminating cone cylinder, one end of the inner noise eliminating cone cylinder is connected with the flow guiding disk, and the other end of the inner noise eliminating cone cylinder is supported by flat steel and arranged in the outer noise eliminating cone cylinder in a sleeved mode to form an air flow channel in a defining mode, wherein the area of the air flow channel is reduced gradually, the geometrical shape of the air flow channel is changed into an axial annulus from a radial annulus in a smooth transition mode; an annular air inlet / outlet is formed between the outer noise eliminating cone cylinder and the flow guiding disk, and an annular air outlet / inlet is formed between the outer noise eliminating cone cylinder and the inner noise eliminating cone cylinder. The radial annular inlet / outlet air noise eliminating device is mainly matched with an axial flow fan or a centrifugal fan, and is widely applied to ventilation systems in mines, tunnels, industrial enterprises and other occasions.

Description

technical field [0001] The invention relates to a radial annular air inlet (outlet) wind muffler. Background technique [0002] The ventilator is a general-purpose mechanical device widely used in industrial and mining enterprises to convert mechanical energy into fluid energy. During its operation, it produces relatively large noise. In order to reduce noise, improve aerodynamic performance, and improve efficiency, mufflers are installed in front of the fans, and collectors are also installed in front of the front wind mufflers. The muffler adopts a cylindrical resistive structure, and generally consists of a flange, an outer muffler, and an inner muffler to form an annular flow channel. Fill the annular space between the shell and the inner cylinder of the perforated plate with sound-absorbing cotton, and weld flanges on both ends of the cylinder to connect to the inlet and outlet of the main fan. The current collector is composed of a rectifying cap and a flared horn tu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/66
CPCF04D29/663
Inventor 谢星明陈重新刘刚王海桥
Owner PINGAN ELECTRICAL