【摘要】 在分析已有装载机载质量测量动力学模型基础上,针对偏载的动态补偿问题进行分析。首先对物料偏载状态下的铲斗进行受力分析,给出铲斗水平时偏载的静态计算方法;然后通过动态力矩平衡分析建立起偏载补偿量与转斗液压缸活塞杆行程、铲斗倾角的函数关系式,从而给出当铲斗处于任意倾斜状态时偏载量的动态补偿方法;最后采用自行研制的装载机载质量测量系统分别对物料无偏载、物料存在偏载但不进行补偿,以及物料偏载并进行动态补偿三种情况进行了对比试验。试验结果表明,经过偏载补偿可以获得与理想状况即无偏载时近乎相同的测量结果,即测量误差可以稳定在1%以内,从而验证了理论分析的正确性。更多还原

【Abstract】 Based on an existent weighing kinetics model of wheel loaders, how to dynamically compensate the lean weight in theory is focused on. Firstly, the calculating method of the lean weight is shown when the bucket in the static and level state. Secondly, after the dynamic analysis of moment balance, the function among the compensation value of the lean weight, the bucket piston’s elongation and the bucket gradient angle is given. That is, the method of dynamic compensation for the lean weight in any state is obtained. In the end, using dynamic weighing system of loaders designed by ourselves, large num- ber of tests were done in the cruel local site to compare the measure results of no lean weight, with lean weight but not to compensate, and to compensate dynamically. The test results indicate that the same measure precision as the ideal instance, i.e. dynamic weighing when there is no lean weight, can be got. And a measure error within 1% can be obtained, which indi- cates that the analyzed theory is correct.更多还原