Parameters Study of High Energy Efficiency Excavator Bucket Based on Discrete Element Theory

In order to solve the technical bottleneck of domestic excavator bucket design and improve the forward bucket design ability, this paper reveals the influence law of key bucket parameters on the overall operation efficiency and energy consumption of excavator by studying the interaction mechanism between bucket and material based on discrete element method under the optimal trajectory. The results show that the filling effect and force of bucket are obviously different with the ratio of width to depth, the complementary cutting Angle and the edge Angle. Therefore, in order to obtain the best filling efficiency and energy consumption, different parameters should be designed for the bucket in different working conditions. For the bucket mainly focused on digging and cutting, the width to depth ratio and edge Angle should be smaller, while the cutting complementary Angle should be larger. Load-based bucket, on the contrary. The recommended ranges of the three are the width to depth ratio of 1.1~1.8, the complementary cutting Angle of 50°~72°, and the edge Angle of 40°~60°. At the same time, under the guidance of its theory, a series bucket with small resistance and high efficiency has been developed, which improves the energy efficiency of the whole bucket by 20% compared with the last generation bucket.