液压挖掘机挖掘阻力特性研究

基于3种常用挖掘方式,研究并得到单次挖掘过程中挖掘阻力随时间和挖掘轨迹的变化规律.对比多次实验结果得到阻力系数和阻力矩系数在挖掘过程不同阶段的分布情况,基于方向角变化规律研究各构件运动对挖掘阻力方向的影响.基于统计学原理计算出阻力系数、阻力矩系数、阻力角和差值角在挖掘阻力不同取值范围内的分布特性、主值区间和概率密度,为理论挖掘力的计算、工作装置的设计和优化奠定基础.

Resistance Characteristics of Hydraulic Excavator

Based on three kinds of conventional digging patterns， the variation regularities of digging resistance with time and digging trajectory in a single digging process were studied. The characteristics of the resistance coefficient and the resistance moment coefficient in different stages of the digging process were obtained， which were based on the comparison of multiple experimental results. Based on the variation regularities of direction angles， the impact of each component motion on digging resistance direction was investigated. The distribution characteristics， the main value range and the probability density of the resistance coefficient， the resistance moment coefficient， the resistance angle and the difference angle in different value range of digging resistance were calculated on the basis of the statistical theory. The results lay a foundation for calculation of theoretical digging force and design and optimization of device.