Noise control method of wideband composite sound absorption structure-based steam turbine generator unit

A turbo-generator set and noise control technology, applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problems of skin irritation, high water absorption, easy deformation and blockage, etc., and achieve noise reduction and noise reduction effects Obvious and economically beneficial effect
CN104358602AInactive Publication Date: 2015-02-18SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
Publication Date
2015-02-18
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a noise control method of a wideband composite sound absorption structure-based steam turbine generator unit and relates to a noise control method. The method comprises the following steps of analyzing noise: evaluating the near-field noise of a steam turbine unit by the noise level which is 1 meter from the unit; calculating theory of a composite sound absorption structure: calculating a perforation plate sound absorption coefficient; optimizing the composite sound absorption structure: combining different sound absorption structures through calculation, wherein the sound absorption structures are combined in two ways of combining dual-layer perforation plates, and combining the perforation plates and porous sound absorption materials. According to the method provided by the invention, a noise source a field and a propagation path on site are detected and analyzed, so that the noise reducing effect is obvious, the requirement of national technological standard can be met, and reference is provided to noise treatment of other steam turbine units. The method is particularly suitable for controlling noise of large equipment, such as a steam turbine, a wind power machine and a blower.
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Description

technical field

[0001] The invention relates to a noise control method, in particular to a noise control method based on a broadband composite sound-absorbing structure turbogenerator set. Background technique

[0002] With the rapid development of industry, construction, and transportation, noise has become one of the four major public hazards of the human environment, and humans are increasingly urgent to control noise. Among them, the impact of severe noise pollution such as steam turbine noise on operators and the surrounding environment has increasingly attracted people's attention. As early as 1967, the United States formulated the first standard to limit the noise of steam turbines, and my country also issued a national standard in 1993. To control the noise of steam turbine units, it is necessary to understand the noise level, distribution law, spectrum characteristics of the unit, and the characteristics of various sound-absorbing materials in order to formulate co...

Claims

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