The screw flight, spiral blade welded on the axial cylinder, is the core component of the screw ship unloader and can be seriously worn by the materials during long-term conveying. The damaged screw flight will make the screw ship unloader unable to unload materials or even lead to an accident. However, the existing wear model cannot be directly applied to predict the wear of the screw flight under different working conditions. Hence, we established a new screw flight wear model based on the Archard wear model and Continuous Medium Hypothesis to predict the service life of the screw flight. Three influencing factors, including speed, filling rate, and pitch, were selected to study the wear law of the screw flight, and the wear law was verified by EDEM simulation. Results indicate that the simulation results affected by the changes in various factors were consistent with the calculation model. With the increase of rotation speed and filling rate, the screw flight wear rate increased. Nevertheless, with the increase of pitch, the screw flight wear rate first increased and then decreased. The screw flight wear model can be used to calculate the wear rate under different working conditions for the screw flight life prediction.

螺旋刮板，螺旋叶片焊接在轴向气缸上，是螺旋卸船机的核心部件，在长期运输过程中会严重磨损材料。损坏的螺丝螺纹将使螺丝船的卸货机无法卸载物料甚至导致事故。但是，现有的磨损模型无法直接应用于预测不同工作条件下的螺纹磨损。因此，我们基于Archard磨损模型和连续介质假说建立了新的螺杆飞行磨损模型，以预测螺杆飞行的使用寿命。选择速度，填充率和螺距这三个影响因素来研究螺杆螺纹的磨损规律，并通过EDEM仿真验证了磨损规律。结果表明，受各种因素变化影响的仿真结果与计算模型基本吻合。随着转速和填充率的增加，螺杆的螺纹磨损率增加。然而，随着螺距的增加，螺杆的螺纹磨损率首先增加，然后降低。螺杆飞行磨损模型可用于计算不同工作条件下的磨损率，以预测螺杆飞行寿命。