轮胎压路机质心与其工作性能

Effects of tyre roller mass center on working performance

为了研究质心对轮胎压路机工作性能的影响,分析了质心与轴载荷的动态分配、压实作业质量、直线行驶、滚动阻力等参数之间的关系,并对26 t轮胎压路机整机性能的测试结果进行了验证。结果表明:质心的高度影响轴载荷的动态分配,质心高度应尽量取较低值,当质心较高时,不仅影响前、后桥动态附着能力的大小,而且影响整机的起步加速和爬坡性能;质心应尽量布置于整机的几何中心线上,使前后桥轮胎两旁的重叠度对称,有利于保证整机的直线行驶性能和有较小的滚动阻力;质心在几何中心线上位置应使前、后轮的平均接地比压接近,保证压实的效率与均匀性。

In order to study the effects of mass center on working performance of tyre roller,this paper analyzed the effects of mass center on dynamic distribution of axle-load,compaction operating quality,straight-line running and rolling resistance,and the analysis was also verified by the testing of 26 t tyre roller.The results show that： the height of mass center influences the dynamic distribution of axle-load,and a lower height of mass center is better,otherwise it will not only affect the adhesion ability of front and rear axle but also affect the start accelerating and climbing performance of whole machine;the mass center should be in the machine＇s geometric centerline to make sure the symmetry of the overlapping front and rear wheels,which is conducive to the straight-line running and less rolling resistance;the horizontal position of mass center in the machine＇s geometric centerline between front and rear wheel axis should be sure to make the average unit pressure of ground of front and rear wheels alike,which can ensure the compaction efficiency and uniformity.5 tabs,3 figs,8 refs.