深海作业抓斗式采样器结构的优化设计
2018-07-16
作者：张琼芳，倪凯，王晓浩
单位：清华大学
摘要：针对深海多金属结核的采样设计了一种双液压驱动型抓斗采样器，建立了抓斗理论分析模型，计算出不同结构参数下抓斗所受阻力矩和所需的液压驱动力，得出液压缸最优安装位置。通过分析抓斗的挖掘阻力，得出抓斗底板与侧刃间夹角对挖掘阻力影响最大，并结合抓斗容积大小，得出最优设计夹角为70°。最后对抓斗式采样器进行有限元仿真优化，实现了在满足各部件强度的情况下减重12%的目标。
关键词：抓斗；抓挖效率；液压驱动；阻力矩
中图分类号：TH122；TP391.9文献标志码：A
Optimal Design of Grab Sampler for Deep Sea Operation
Zhang Qiongfang，Ni Kai，Wang Xiaohao
Abstract:A dual hydraulicdriven grab sampler is designed for the sampling of polymetallic nodules in the deep sea.The theoretical analysis model of the grab is established to calculate the resistance moment and the required hydraulic driving force under different structural parameters，and the best installation position of the hydraulic cylinder is determined.By analyzing the grab’s digging resistance，it is found that the angle between the bottom plate and the side edge of the grab has the greatest influence on the digging resistance.With reference to the grab’s volume，the optimal angle is set to be 70 degrees.Finally，through the finite element simulation，the weight of grab sampler is optimized to be reduced by 12% under the premise of the strength requirement for each component.
Keywords:grab；digging efficiency；hydraulic drive；resistance moment