5吨装载机减振分析与应用

发布时间：2018-03-02 18:32

本文选题：装载机　切入点：动力总成　出处：《山东大学》2012年硕士论文　论文类型：学位论文

【摘要】：随着社会的发展,人们对工程机械的要求已经不仅仅是其作业能力,安全性、舒适性和噪声品质也日益引起人们的关注。剧烈的振动除了使驾驶员感到不适,还会对整车可靠性等产生不利影响。动力总成是工程机械振动的主要激振源之一对整车工作性能和乘坐舒适性有很大的影响,设计合理的动力总成悬置系统可以明显地降低振动,改善乘坐舒适性和降低噪声,提高装备的整车性能。本文基于模态实验法测量某型装载机动力总成的质量参数和惯性参数,基于撞击中心理论和垂直刚度理论重新设计悬置参数。经实验验证,改进之后减振性能得到改善,取得理想的效果。除此以外,本文还做了以下研究：通过实验测得某型5吨装载机的振动数据和发动机支架的锤击测试数据,分析数据测得数据,发现该型装载机上发动机支架产生共振对隔振的影响非常大,建议增加支架横向和纵向刚度,更换大阻尼的发动机减振器,以衰减抑制共振。通过实验对新旧两款驾驶室台架进行分析,实验结果表明,总体说来新台架的减振效果比旧台架好,如能对转向柱与台架连接部位增加刚度,可能会取得更好的效果。通过实验对比装载机驾驶室不同减振器的隔振效果,分析实验数据,可对减振器的隔振性能优劣做出排序,以便厂家综合考虑价格等因素合理选取减振器。
[Abstract]:With the development of society, people's demand for construction machinery is not only its working ability, safety, comfort and noise quality, but also attracts more and more attention. Power assembly is one of the main vibration sources of construction machinery vibration, which has great influence on the working performance and ride comfort of the whole vehicle. Reasonably designed powertrain mount system can obviously reduce vibration, improve ride comfort and noise, and improve the performance of the whole vehicle. In this paper, the mass and inertia parameters of the power assembly of a certain loader are measured based on the modal experiment method, and the mounting parameters are redesigned based on the impact center theory and the vertical stiffness theory. In addition, this paper has done the following research:. The vibration data of a 5 ton loader and the hammer test data of the engine support are measured experimentally. The data are analyzed and it is found that the vibration isolation is greatly affected by the resonance of the engine support on the loader. It is suggested to increase the transverse and longitudinal stiffness of the support and replace the engine damper with large damping to attenuate and suppress resonance. The experimental results show that the vibration absorption effect of the new bench is better than that of the old one. If the stiffness of the connection between the bogie column and the platform can be increased, better results may be obtained. By comparing the vibration isolation effect of different vibration absorbers in the cab of loader and analyzing the experimental data, we can sort the vibration isolation performance of the absorber, so as to select the shock absorber reasonably considering the factors such as price and so on.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH243

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