Ball mill acoustic hood noise control method

Abstract

The invention relates to a noise control method, in particular to a ball mill acoustic hood noise control method. The ball mill acoustic hood noise control method includes: performing ball mill noise characteristic analysis by taking a motor and a speed reducer of the ball mill as objects, establishing an acoustic hood finite element model by ANASYS finite element software, analyzing to adopt an acoustic hood of a broadband composite acoustic absorption structure for denoising, mounting the closed acoustic hood on the motor of the ball mill, optimizing the shape of the acoustic hood, and subjecting the acoustic hood to finite element analysis and calculation so as to achieve noise control of a ball mill house, wherein when the acoustic hood is mounted, a distance is reserved between the inner wall of the acoustic hood and the motor to decrease coupling resonance generation possibility, and vibration isolation treatment is performed among the acoustic hood, the motor and a motor base to change rigid connection into elastic connection. The ball mill acoustic hood noise control method has the advantages that the ball mill acoustic hood of the improved broadband composite acoustic absorption structure is remarkable in acoustic insulation effect, and denoising performance of the acoustic hood is improved.

Description

technical field [0001] The invention relates to a method for controlling mechanical noise, in particular to a method for controlling noise of a ball mill sound insulation cover. Background technique [0002] Ball mill is a high-fine grinding mechanical equipment widely used in industrial production at home and abroad. The ball mill has a wide range of applications and is widely used in ore dressing, cement building materials and chemical industries. However, the ball mill will produce a lot of noise during the work process. People nearby are very harmful; when the barrel of the ball mill is exposed, the noise value can be as high as 110dB(A), which is one of the most serious noise sources of noise pollution generated by mechanical equipment in various industrial productions in the world today. Therefore, the noise control of ball mills has become one of the topics that scholars at home and abroad have paid close attention to, and at the same time, certain effects have been o...

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Problems solved by technology

However, at present, the material of the sound insulation cover of the ball mill is relatively simple, and the structure is relatively simple. Usually, materials such as asphalt base and rubber are used as damping and vibration-absorbing materials, and porous sound-absorbing materials such as asbestos wool and glass wool are used as the main sound-absorbing materials. Therefore, it is difficult to make a breakthrough in the noise control effect of the ball mill

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