Hydraulic System Designed Of Self-loading Trailer In Forest And The Motion Analysis Of Grapple

With the rapid economic development and increasing labor costs, fewer and fewer workers are willing to engage in timber skidding and transport operations, in order to improve the efficiency of the entire industry, reduce labor intensity, Self-loading trailer in forest will come into being. This article systematically analyzes the development of domestic and foreign skidding equipment, according to the self-loading trailer forest design requirements, determine its overall design and main parameters, and the hydraulic Grapple’s structure and working principle conducted in-depth research.This article describes the composition of self-loading trailer hydraulic system, drawing the hydraulic schematic view of a self-loading trailer operating characteristics, and each sub-loop concrete research, Calculate the important element of parameters of the hydraulic system. Due to the work of the telescopic hydraulic circuit greater energy losses, telescopic hydraulic circuit of important parameters were optimized By MATLAB complex method.The energy loss significantly reduce by optimized.A mathematical model is developed for the mechanical arm of the self loading trailer. Calculates the cylinder pressure,operating range and working height of the mechanical arm by the theory.Through ADAMS software from loading trailers in forest for motion analysis, get respective hydraulic cylinders the forces at various locations and position change curve of Hydraulic Grapple. Numerical comparison of heoretical calculation and simulation analysis, verified the correctness of the two algorithms.To mechanical arm the static and modal analysis by ANSYS software. Through static analysis, obtained manipulator strain contour and stress contour, verify that the mechanical arm when the job rationality strength and stiffness. By modal analysis, it calculated mechanical arm natural frequencies and mode shapes and avoid resonance phenomenon.Self-loading trailers in forest as a new type of skidding equipment, for the forest skidding machinery research provides an important theoretical basis, But also for the development of China’s forestry machinery to make a contribution.