压路机振动轮的研究与设计毕业设计说明书精选.doc

摘 要 随着振动压实理论的逐步完善以及新的压实技术和控制技术在压路机中的应用，新型振动压路机的研究逐渐显出其重要性及必要性。本次毕业设计的主要任务是设计一种全新的振动压路机的振动轮结构，使其能够实现无级变幅变频。 设计中，通过变量泵-定量马达组成的调频系统就能够实现振动的变频，因此，无级调幅机构为本设计的重点。本设计为一种新型结构的振动轮，关键部分为振动位于轮中心的振动激振器，这部分结构加上液压缸的综合应用，改变两偏心块的相对角度来改变有效振幅,便实现了振动轮振动的无级变幅。 除了振动轮参数的设计计算部分，本文还包括了对课题研究意义的分析，以及对本领域目前发展情况的研究讨论。 关键词：振动压路机， 振动轮， 无级调频， 无级调幅 ABSTRACT As the vibratory compaction theory has been perfected gradually，and the new compaction technology and the advanced control technology have been applied to the roller, the research of new structure of vibratory roller becomes important and also necessary. The main task of this graduation project is to design a new type of mechanism in the vibration wheel that can change the frequency and amplitude steplessly. In this paper, a system with a variable pump and a constant displacement motor is used to as power source, which can change the frequency. So the focus of this paper is the stepless and variable amplitude mechanism. This paper represents the design and analysis of the vibration wheel with stepless and variable amplification. The most significant part is the vibration exciter that is in the center of the vibration wheel. The vibration exciter, together with a hydraulic cylinder, is used to change the amplitude steplessly through changing the angle and direction between two eccentric axes. Besides the designing and the calculating of the vibration wheel, this paper also contains the analyses of the value of this project and the research of the development of this field. KEY WORDS: vibration roller, vibration wheel, stepless and variable amplitude adjustment, stepless and variable frequency adjustment 目录 第一章 绪论 5 1.1课题的意义 5 1.2压路机的发展历程及国内外发展概况 5 1.2.1压路机的发展历程 5 1.2.2国外的变频变幅发展概况 6 1.2.3国内的发展概况 8 1.2.4国内外振动压路机无级调幅技术的三个相关专利 9 第二章 变频变幅振动论的压实原理 11 2.1 振动压实机理 11 2.2 变频变幅振动压实的优势 14 第三章 设计思路及结构原理 15 3.1 振动轮调频的设计思路 15 3.2 振动轮调幅的设计思路 16 第四章 变频变幅振动论的总体设计及计算 18 4.1 振动轮振动参数的讨论及确定 18 4.1.1 振动频率 19 4.1.2 工作振幅和名义振幅 19 4.1.3 振动加速度 20 4.