三一全液压驱动轮胎压路机

为了满足国内高速公路等建设的需要,三一重工吸取国内外先进的液压驱动及轮胎压路机设计制造技术经验,设计制造了YL25、YL28、YL30等全液压驱动轮胎压路机.该机型主要采用了以下的先进结构:液压传动驱动、前轮摆动装置、行星减速机终端传动、自动(人工)集中充气系统及偏转轮转向等.     

轮胎压路机压实特性的分析与作业参数的确定

分析了轮胎压路机的压实特性，验证了充气轮胎对各种类型的材料进行碾压的可能性和作用效果。通过理论分析和实验数据，提出了轮胎压路机轮胎荷重、轮胎最佳气压、轮胎平均接地比压、压路机运行速度及最佳碾压遍数等参数的确定方法．并结合轮胎压路机的特点，提出了具体使用要求。     

双钢轮振动压路机液压系统动态性能试验分析

双钢轮振动压路机被广泛应用于路基和面层的压实作业中,其工作动力均由液压系统完成,包括行驶液压系统、振动液压系统、转向液压系统,是全液压工程机械的典型机型。目前,国产双钢轮振动压路机均采用国际知名大公司的进口液压元件和传动部件,组成各种典型液压系统,振动压路机工作过程中液压系统     

压路机液压振动系统型式与设计

本文分析了液压传动用于压路机振动系统的特点,提出了以2种典型型式分类的液压振动系统,论述了2类系统各自的特点及设计中注意选择的要点,并给出了液压振动系统的设计计算方法.     

轮胎压路机压实特性的分析与作业参数的确定

轮胎压路机是以特制的充气轮胎对铺层材料施加压实作用,它具有静力压实和揉搓作用,广泛应用于公路、城市道路、机场跑道等工程。本文重点分析了轮胎压路机的压实特性,提出了轮胎压路机压实作业参数的确定方法,以及使用注意事项。     

全轮驱动压路机液压驱动系统动态特性分析

通过分析全轮驱动压路机的液压驱动系统的动态特性，找出压路机动态参数之间的相互关系，并对压路机动态工作过程和前后轮速度匹配理论进行探讨，得出改善压路机液压驱动系统动态特性和前后轮速度匹配的方法。     

国内领先水平轮胎压路机在徐工科技诞生

近日，徐工科技传来喜讯，由该公司自主研发设计、具备国内领先水平的轮胎压路机——XP200H轮胎压路机试制成功。     

YL30型轮胎压路机性能介绍

山东公路机械厂直属山东省交通厅公路局，是全国筑养路机械和桥梁附件的主要生产厂家，生产“路星”牌振动压路机、轮胎压路机、稳定土拌和机、冷再生机、热再生机、桥梁伸缩缝等系列产品，其中YL30型轮胎压路机是其主打产品之一。     

基于SMA材料特性的压实技术研究

针对SMA混合料的压实技术问题,分析了SMA混合料的材料和级配特征,以及振荡压路机、高频振动压路机和轮胎压路机的压实机理和特性。结果表明:振荡压路机、高频振动压路机压实效率高,而轮胎压路机具有"搓揉提浆"作用,会使混合料中的沥青向上迁移;由于SMA混合料具有较大的内摩阻力和粘性阻力,施工时应采用振荡或高频振动压路机进行初压和复压,不宜使用轮胎压路机。     

振动压路机智能化与压实控制研究概况

1930年德国人首先研制出世界上第一台振动压路机,经过几十年的不断研究与改进,振动压路机现已成为压路机市场的主导产品,占据了世界市场85%以上的份额.随着液压传动、全轮驱动、无级调幅、调频等技术的应用,特别是微电子、自动控制、电子信息和计算机、遥感通讯等技术的迅速发展,振动压路机进入到了一个新的发展时期,振动压路机的智能化已成为新的发展趋势,并已初具雏型.     

轮胎压路机压实沥青混合料原理分析

沥青混合料的压实是影响沥青路面性能的重要因素之一。根据轮胎压路机的压实过程,结合有效应力和固结原理并结合力学原理,分析轮胎压路机的压实机理及揉搓作用,提出轮胎压路机在对沥青混合料压实中的使用注意事项。     

振动压路机振动系统动态响应的分析研究

采用拉格朗日方程建立铰接式轮胎驱动振动压路机的动力学模型．并通过计算机数值计算，分析研究了车体转动惯量、振动轮与整机质量比、减振器与地面刚度比、驾驶室减振器和驱动轮刚度对振动压路机压实能力和驾驶舒适性的影响．提出了一些有关振动压路机设计的参考性意见。     

New tyre-road contact model for applications at low speed

Most of the tyre models have been developed for high speed, combined forces, etc., however, in certain tests it is necessary to know tyre behaviour at very low speed in order to evaluate different systems. So, during vehicle inspection and maintenance of the steering and brake system, by means of sideslip tester and roller brake tester respectively, the forces transmitted by the tyres are measured; all of these inspections are carried out at low speeds. Furthermore, usually, automobile vehicles run at low speeds during an important part of their operating life (less than 60 km/h), mainly during urban traffic, and in steady state conditions. Therefore, it is particularly interesting to develop an accurate model of the contact patch tyrepavement for low speeds without the complexity of models that cover a wide speed range but provide less precision at very low speeds. The dynamometer plate has proved to be an appropriate test equipment to characterise the tyre-pavement contact at low speed and the steering geometry and wheel alignment. It has the feature of being able to carry out tests with the tyre installed in the vehicle as in completely real conditions. The main aim of this research is to set up a contact model between tyre and pavement at very low speed based on the measurement of longitudinal and lateral forces. A test methodology that allows carrying out the experimental tests in a systematic and controlled way with the dynamometer plate has also been developed. From this model it will be possible to estimate the forces that tyres are capable of transmitting in different situations to act in the parameters which affect these forces and maximize them.     

军车轮胎评价指标体系探究

简述了国内外军用车辆配套轮胎发展现状,分析了军用车辆对轮胎的特殊技术要求,根据轮胎与整车性能的相关性分析,运用系统分析和逻辑推理的方法,分别从单胎和整车两个角度构建了军车轮胎的评价指标体系,为军车的轮胎选型、设计和试验评价提供了借鉴。     

An Alternative Method to Determine the Magic Tyre Model Parameters Using Genetic Algorithms

Summary Tyre behavior plays an important role in vehicle dynamics research. Knowledge of tyre properties is necessary to properly design vehicle components and advance control system. For that purpose mathematical models of the tyre are being used in vehicle simulation models. The Magic Formula Tyre Model is a semi-empirical tyre model which describes tyre behavior quite accurately. The Magic Formula Tyre Model needs a set of parameters to describe the tyre properties; the determination of these parameters is dealt with in this paper. A new method based on genetic techniques is used to determine these parameters. The main advantages of the method are its simplicity of implementation and its fast convergence to optimal solution, with no need of deep knowledge of the searching space. So to start the search, it is not necessary to know a set of starting values of the Magic Formula parameters. The comparison between analytical optimization methods and the method proposed is discussed in this paper.     

An Alternative Method to Determine the Magic Tyre Model Parameters Using Genetic Algorithms

Summary Tyre behavior plays an important role in vehicle dynamics research. Knowledge of tyre properties is necessary to properly design vehicle components and advance control system. For that purpose mathematical models of the tyre are being used in vehicle simulation models. The Magic Formula Tyre Model is a semi-empirical tyre model which describes tyre behavior quite accurately. The Magic Formula Tyre Model needs a set of parameters to describe the tyre properties; the determination of these parameters is dealt with in this paper. A new method based on genetic techniques is used to determine these parameters. The main advantages of the method are its simplicity of implementation and its fast convergence to optimal solution, with no need of deep knowledge of the searching space. So to start the search, it is not necessary to know a set of starting values of the Magic Formula parameters. The comparison between analytical optimization methods and the method proposed is discussed in this paper.     

TBM主机皮带机螺旋托辊的安装及受力分析

以TBM主机皮带机双向螺旋橡胶托辊为研究对象,分析其在运输物料的过程中弯矩、剪力和轴力的变化,详细阐述托辊支架的优点和具体的安装方式,说明这种托辊运输的优点。通过分析得出双向螺旋橡胶托辊具有很好的防跑偏和自动调心功能,但在运输物料过程中受力较为复杂。     

3D brush model to predict longitudinal tyre characteristics

A 3D tyre brush model, which aims to predict the longitudinal tyre characteristic under steady-state conditions by modelling the occurring physical effects in the tyre–road contact patch, is presented. The model includes an analytical method to describe the tyre footprint geometry, the pressure distribution, the slip due to the lateral tyre contour, the slip due to braking or traction and the longitudinal as well as the lateral shear stresses on a flattened tyre. The presented development tool offers a method to investigate different rubber friction data (caused by different tread compounds and/or surface textures) and to analyse its influence on longitudinal tyre characteristics. The tyre design is fixed (same casing, dimension and pattern). The results include the shear stresses as well as the different sliding velocities in the contact patch for different slip conditions. The model was developed for a standard summer pattern design and a standard tyre dimension (205/55R16). It can also be adapted to other tread designs and tyre dimensions. To offer a good comparability between model results and test bench measurements, the surface curvature of an internal test rig is considered.     

越野汽车驱动轮牵引性能的两种测试方法

介绍了测试越野汽车驱化牵引性能的两种不同方法，即逐点间断试验法和连续模拟试验法。以５．００－１０型轮胎粉列，分别用两试验方法测得了其牵引性能，并进行了对比分析，得出了两种试验方法的优缺点，为今后实应用提供了依据。