Abstract
Screw flight on a vertical screw conveyor, which is a spiral blade welded on an axial cylinder, is the core component of a screw ship unloader and can be seriously worn by the materials during long-term conveying. Damaged screw flights make the screw ship unloader unable to unload materials or even lead to an accident. Hence, we established a new screw flight wear model based on the Archard wear model and continuous medium hypothesis. Two influencing factors, speed and filling rate, were selected to study the wear law of the screw flight, and the wear law was verified experimentally. The results indicate that the experimental results were consistent with the calculation model. The wear rate of the screw flight was approximately parabola-increased with the increase in rotational speed, and the screw flight wear rate positively and linearly correlated with the filling rate.
Highlights
The vertical screw conveyor is mainly used in port screw ship unloaders to load and unload coal or crops and has the characteristics of low energy consumption, high transmission efficiency, and capacity to lift more materials (Sun et al 2018)
Based on the Archard wear model and the continuous medium hypothesis of the coal particles in the vertical screw conveyor, this study constructed a screw flight wear model verified by the experiment
The proposed screw flight wear model was established based on Archard wear theory, which obtains the positive pressure of the scattered particles based on the continuous medium hypothesis method
Summary
The vertical screw conveyor is mainly used in port screw ship unloaders to load and unload coal or crops and has the characteristics of low energy consumption, high transmission efficiency, and capacity to lift more materials (Sun et al 2018). The EDEM software based on the discrete element method has been used by more scholars to study the wear of equipment for conveying different bulk materials, and the accuracy of its calculation results has been verified by different experiments. Wang et al (2019) used the continuous medium hypothesis to study the positive pressure of activated coke particles in an absorption tower and verified through experiments that the continuum model can effectively describe the mechanical properties of the activated coke particles in the absorption tower. This study established a screw flight wear model based on the Archard wear model, which used the continuous medium hypothesis to calculate the positive pressure Fn at different positions of the bulk in the vertical screw conveyor. The model was experimentally verified by analyzing the rotational speed and filling rate
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Transactions of the Canadian Society for Mechanical Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
