摘要工程机械中的振动不仅容易破坏工程机械结构的强度，引起结构噪声，还会直接作用于设备、建筑和人体，产生很多不良后果。例如振动作用于建筑会使建筑发生开裂、变形直至倒塌，飞机的发动机和机翼的异常则会造成严重的飞行事故。而噪声不仅会干扰人们的正常工作，使人感到烦躁，反应迟钝，工作效率低下，而且还会对人的听力和健康受到严重损害。减振降噪是如今众多机械设计中的技术难点。63553

而本文主要是减振降噪技术在医用空气压缩机中的应用，对空气压缩机结构进行优化设计达到减振降噪的效果。本文主要通过频谱分析仪对医用空气压缩机的振动与噪声的来源及噪声分布进行分析，结合振动与噪声控制技术理论，提出合适的结构改进方案并建立三维模型。计算确定空气压缩机的结构尺寸及材料。最后通过对减振降噪的结果的分析对结构进行进一步的优化。

关键词 空气压缩机 减振 降噪 结构设计

毕业设计说明书（毕业论文）外文摘要

Title  Structure design of medical air compressor about noise and vibration

Abstract Vibration of construction machinery can not only easily destroy the structural strength of construction machinery, causing structural noise, but also directly act on the equipment, buildings and human, resulting in a lot of adverse consequences. For example, vibration acting on the building makes building cracking, deformation until the collapse. The abnormal of aircraft engines and wings would cause serious flight accidents. And noise will not only interfere with people’s normal work, but also seriously damage to human health. Vibration and noise reduction is now the technical difficulty of mechanical design.

This article is the application of vibration and noise reduction technology in the medical air compressor. Optimize the structure of the air compressor to reduce vibration and noise. We analysis sources and distribution of the noise with the spectrum analyzer. We make appropriate program of structural improvement, combined with the theory of vibration and noise control technology，and build a 3D Model. Then calculation to determine the structure and size of air compressor and materials. Finally, further optimize the structure by the results of the analysis of vibration and noise reduction.

Keywords: Air Compressor, vibration, noise, structural design

目录

１  序言 1

1.1  医用空气压缩机减振降噪的现状 1

1.2  医用空气压缩机减振降噪存在的问题 2

2.  医用空气压缩机振动及噪声的分析 4

2.1  空气压缩机工作原理 4

2.2  空气压缩机的振动分析 4

2.3  空气压缩机的噪声分析 5

3.  医用空气压缩机减振降噪的理论及技术方法 7

3.1  振动控制理论及技术方法 7

3.1.1  吸振技术 7

3.1.2  隔振技术 10

3.1.3  阻尼减振 11

3.2   噪声控制理论及技术方法 12

3.2.1  吸声技术 12

3.2.2  隔声技术 13

3.2.3  消声技术 14

4.  医用空气压缩机减振降噪结构总体方案设计