Abstract
Vibratory roller is a kind of highly efficient compaction machine which is widely used in the road construction. Most of domestic vibratory rollers adopting mechanical transmission are light or medium size at present, while full hydraulic and heavy vibratory rollers with high performance are mainly depended on importation. To change the actuality completely, the heavy vibratory rollers with high performance an our own intellectual property rights must be developed and manufactured.
The general development of road rollers is stated in this paper. The theories of vibratory compacting and the configuration and work theory of vibratory wheel and the compact characteristic and effect of vibratory road roller are introduced. In this paper the physical property, dynamic characteristics and vibration compaction mechanism of soil are studied and a mathematical model of vibratory rollers is created. The dynamic responses between the amplitude, acceleration, exciting force, acting force on the ground and vibration frequency are determined, and according to which, frequency, amplitude and mass are designed. Determine the important vibratory performance specifications for the compaction operation of roller，such as the operating mass，vibratory frequency，amplitude，centrifugal force，power of engine and so on.
Based on theoretical analysis and calculation, the overall design of model YZ20D vibratory roller and the main part design of  hydraulic system，roller and vibration damping system have been complished.
  Key Words: Vibratory roller；the overall parameters；Grade ability check ；shock absorbers；Hydraulic system
目录
1绪论 1
1.1 研究的背景 1
1.2研究的意义 1
1.3国内外相关研究现状 2
1.3.1国内研究情况 2
1.3.2国外研究情况 2
1.4研究的主要内容 3
2振动压路机设计综述 4
2.1振动压路机 4
2.1.1振动压路机的种类 4
2.1.2振动压路机的基本结构和特点 5
2.1.3振动压实的基本原理 5
2.1.4振动压实的性能特点 6
2.1.5振动压实的结构特点 6
2.2振动压路机总体设计 7
3总体参数确定及部件设计计算 10
3.1振动压路机总体参数的确定 10
3.1.1振动压路机总体参数的选择依据 10
3.1.2名义振幅的选择 10
3.1.3振动压路机工作频率的选择 11
3.1.4振动压路机部分质量的确定 12
3.1.5振动压路机振动加速度的校核 14
3.1.6振动压路机工作速度的确定 14
3.1.7激振力和振动压路机对地面的作用力 16
3.1.8振动轮宽度和直径的确定 16
3.2振动压路机发动机功率的计算 17
3.2.1行驶功率P1 17
3.2.2转向功率P2 18
3.2.3换向功率P3 19
3.2.3振动压路机的爬坡功率（KW） 19
3.2.4振动压路机的振动功率P5 20
3.2.5振动压路机的功率组合 21
3.2.6振动功率P5的研究讨论 22
4振动压路机爬坡能力校核 28
4.1爬坡能力的概述 28
4.2由牵引力决定的压路机爬坡能力 28
4.3由附着力决定的压路机爬坡能力 29
5压路机数学模型和运动方程的建立 32
5.1振动压路机数学模型的建立原则 32
5.2两个自由度系统振动压路机的运动方程 32
5.3运动方程中各个参数的取值 35
6振动压路机的动态响应 37
6.1位移-频率（）和加速度-频率（）曲线 37
6.2激振力-频率() 曲线和振动压路机对土的作用力-频率() 曲线 38
6.3下车质量对曲线、曲线和曲线的影响 39
6.4减振器刚度对曲线的影响 40
6.5土的刚度和阻尼对曲线的影响 40
7振动压路机液压系统 41
7.1液压传动性能特点分析 41
7.2振动压路机行走液压系统 42
7.3振动液压系统 43
7.4转向液压系统 43
8结论 44
参考文献 45
致  谢 46

机械毕业设计|论文