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Device for controlling rotary gas-liquid mixed flow noise

A flow noise and control device technology, applied in the direction of exhaust devices, mufflers, engine components, etc., can solve the problems of high requirements and rare liquid phase mufflers, and achieve strong pertinence, reduce exhaust noise, and compact space structure Effect

Inactive Publication Date: 2012-06-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, conventional mufflers mainly include resistive muffler and resistive muffler, or impedance combination, but they all rely on sufficient volume transformation to achieve noise control, and the limited space of the exhaust pipe has high requirements on the structure of the muffler;
[0005] 2. Gas-liquid mixed flow problem
At present, it is mostly said that the muffler is mainly used for gas phase muffler, but it is extremely rare for liquid phase muffler and gas-liquid mixed muffler

Method used

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  • Device for controlling rotary gas-liquid mixed flow noise
  • Device for controlling rotary gas-liquid mixed flow noise
  • Device for controlling rotary gas-liquid mixed flow noise

Examples

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Embodiment 1

[0055] Embodiment 1, Fig. 0~ Image 6 In combination, a noise control device for rotating gas-liquid mixed flow is given, including guide vane assemblies 100, vortex control structures 200, baffles I300, baffles II400 and Partition III500;

[0056] The guide vane assembly 100 is composed of a vane shaft 10 and 2 to 4 vanes 21 evenly arranged on the vane shaft 10, and the wrap angle of the vanes 21 (that is, the central angle of a fan shape of a horizontal projection of a vane) ranges from 90° ~180°. The outer outlet angle β1 of the blade 21 (that is, the angle between the intersection line between the blade 21 and the blade shaft 10 and the horizontal line in the expansion plane of the shaft cylinder of the blade 21, such as figure 1 Shown) is 30°-60°, and the inner outlet angle β2 of the blade 21 (that is, the angle between the intersection line of the blade 21 and the exhaust pipe 12 and the horizontal line in the cylinder expansion plane of the exhaust pipe 12, like f...

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Abstract

The invention discloses a device for controlling rotary gas-liquid mixed flow noise. The device comprises a guide vane assembly (100), a vortex control structure (200), a partition plate I (300), a partition plate II (400) and a partition plate III (500) which are sequentially arranged in a tail gas exhaust pipe (12) in an airflow direction; a resonant chamber I (20) is formed in the inner cavity of the tail gas exhaust pipe (12) between the guide vane assembly (100) and the partition plate I (300), a resonant chamber II (30) is formed in the inner cavity of the tail gas exhaust pipe (12) between the partition plate I (300) and the partition plate II (400), and a resonant chamber III (40) is formed in the inner cavity of the tail gas exhaust pipe (12) between the partition plate II (400) and the partition plate III (500); and each of the partition plate I (300), the partition plate II (400) and the partition plate III (500) is provided with a central through hole and an edge through hole. The device has the characteristic of good de-noising effect.

Description

technical field [0001] The invention relates to a noise control device for rotating gas-liquid mixing flow, which is suitable for eliminating the noise of gas-liquid exhaust after mixing high-temperature tail gas and cooling liquid of various thermal power devices. Background technique [0002] In the application occasions of various thermal power devices, the noise problem has been widely paid attention to because of its special importance. One source of noise comes from exhaust emissions from thermal power plants. A large amount of exhaust gas generated by the thermal power unit is mixed with cooling water and discharged into the external environment through the rotating exhaust pipe. This process produces strong noise. [0003] At present, the United States, Russia and other countries have carried out in-depth research on various types of thermal power exhaust noise, but there are few detailed public reports. At present, there are few special noise control structures in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N13/08F01N1/02B01D45/16
Inventor 吴大转许伟伟戴维平王乐勤杜韬陈一伟
Owner ZHEJIANG UNIV
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