The optimal design model for a new type of scraper and research on its material properties

Abstract

Mining scrapers as an important part of scraper conveyors are highly prone to wear and fatigue failure. A new scraper capable of turning sliding friction into rolling friction was designed to limit wear and reduce failure rate. To determine the safety and reliability of the new scraper, numerical pulling force measurement was made on its physical model and finite element analysis was performed on its 3D model based on SolidWorks Simulation. The results are then compared with data of the traditional scraper. Numerical pulling force measurement results indicated impressively lower friction for the new scraper. Stress, strain, and displacement distributions obtained by static stress analysis based on SolidWorks Simulation proved conformance with the strength and deflection standards. Damage percentage and total life nephograms yielded from fatigue analysis indicated no significant life reduction. Numerical pulling force measurement combined with analysis based on SolidWorks Simulation can help reduce the production cost and development cycle. It plays a great role in determining the safety, reliability, and stability of the new scraper.

Dynamic characteristics of scraper conveyor chain drive system under the impact condition of lump coal

“…Yao et al [9] obtained the simulation data of normal contact energy and impact damage depth of the middle groove of scraper conveyor based on orthogonal matrix analysis and discrete element method, and established the contact energy matrix and impact damage depth matrix to get the optimal working condition combination of scraper conveyor. Hao et al [10] designed a new type of scraper, which can convert sliding friction into rolling friction, and used SolidWorks Simulation to carry out finite element analysis on its threedimensional model, and the results show that the new type of scraper helps to extend the service life of the scraper conveyor. Wojnar et al [11] experimentally investigated the vibration of the reducer of a scraper conveyor by means of determining the position of the gear teeth on the reducer of the scraper conveyor, which in turn analyzed the dynamics of the scraper conveyor.…”