Mechanical characteristics of the scraper chain transmission system under the condition of chain blocked

In this study, the space equation of the ring chain model is established.The maximum stress and pressure distribution of contact area in the ring chain are calculated using Hertz theory.The forces between the sprocket and the scraper chain in the meshing process are analyzed, and the conditions for the sprocket link to meet the requirement of steady meshing are obtained.Also, the maximum stress of the meshing contact area of the sprocket chain is calculated.Based on the multi-body dynamic simulation software ADAMS, a prototype model of the scraper chain transmission system is established.The joint force between the flat ring and the vertical ring and the meshing force between the flat ring and the sprocket are simulated and analyzed.It is concluded that the connection force between flat ring and vertical ring and the meshing force between flat ring and chain socket will both increase under a chain blocking condition and either of the forces is far greater than the corresponding one during normal transmission.In order to further analyze the dynamic characteristics of the flat ring and the vertical ring, the chain ring and the chain wheel when the chain is blocked, the finite element analysis of the scraper chain transmission system is carried out.The law of velocity, acceleration and stress variation between ring chains and the law of speed, acceleration and stress variation between chain links and sprockets are obtained, which provide some key parameters for the optimization design of scraper chain transmission system.