摘 要
振动压路机是一种高效的压实机械，广泛应用于道路建设施工中。目前国产振动压路机以中小吨位和机械传动方式为主，而性能优良的全液压重型振动压路机主要依赖于进口。为彻底改变这种现状，必须研制和生产具有自主知识产权的高性能重型振动压路机。
本文本论文简述了国内外压实设备和压实技术的发展概况、振动压实的原理、振动轮的结构和工作原理、振动压路机的压实特性与压实效果,动力学特性和振动压实机理进行了研究与分析，建立了振动轮的数学模型，明确了振幅、加速度、激振力、对地面作用力与振动频率之间的动态响应关系，以此作为参数的设计依据,计算出了 YZ20D 型振动压路机的整机工作质量、振动频率、振幅、激振力、发动机功率等压路机压实作业中重要的振动性能参数及振动轮等关键技术结构进行研究及确定，最大功率。
本文在理论分析和计算的基础上，完成了 YZ20D 型振动压路机总体和液压系统、振动轮总成等主要部件的设计。
关键词: 振动压路机； 总体参数；功率计算；爬坡校核；液压系统
YZ20D Type Vibratory Rollers Overall Design
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.
KeyWords: Vibratory roller；the overall parameters；Grade ability check；shock absorbers；Hydraulic system
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