Experiment Study Of The Performance On The Miscanthus Cutting

With the applications and studies of energy miscanthus bioconversion for energy regeneration improvements, The demand for raw materials in the future will be an impediment to industrialize develop.There were few studies on the miscanthus machinery now. Harvest has been staying in traditional artificial cut cut stage, to suit the requirements of biological energy factory for raw materials, it is necessary to research on biomass collection machinery since to prepare for future needs. Miscanthus in miscanthus as the research object, research the mechanics characteristic of stem for miscanthus mechanical design reasonable way of cutting and cutting tool provides basic technical parameters.This article main research contents and conclusions are as follows:(l)Miscanthus stem cutting is related to the maximum bending stress; Miscanthus stem cutting critical speed is proportional to shear strength and the plastic modulus and density and shear into nonlinear regressive relationship.(2)By miscanthus stem cutting resistance of single factor and multiple factors influencing factor test cutting test results can be obtained:under certain conditions, choosing a serrated blade, smooth cutting way cutting miscanthus stem cutting least resistance; Serrated blades in sliding cutting experiment miscanthus stem cutting resistance and decreases as the speed of the tendency, but is not obvious linear relationship; Miscanthus stem cutting resistance are by Cubic function increases with the increase of diameter. Stress and shear strength decrease with the increase of the diameter of the Cubic function; Node cutting resistance is greater than internode place; Miscanthus stalks of cellulose and lignin content affect the cutting resistance change and affect the quality of miscanthus mechanization harvest; Within the scope of the moisture content of20%to90%, miscanthus stem cutting resistance trend of first increases and then decreases, and the moisture content near the fiber saturation point, cutting resistance is larger. Based on the optimal solution for cutting way for smooth cutting; Cutting speed is400mm/s; Cutting blades for the serrated blade.(3)By miscanthus stem physical properties test, bend test results concluded that: test of bending load-displacement curve showed a certain nonlinear characteristics. Tests, the load exceeds miscanthus maximum load, miscanthus moment broken, presents the obvious brittle fracture. Through SPSS, multivariate analysis of variance, stem of different location to mount/south should realize hybrid,2years gave birth to the national south of asexual reproduction, and3years living south national seed seedlings between the bending performance in the stem department position extremely significant difference. Tensile test concluded that mans/south should realize hybrid stalks the modulus of elasticity of mean value is1727mpa, yield stress average for43MPa.(4)Miscanthus was established based on ANSYS/ls-dyna software stem-cutting knife system, a simulation model of ternary quadratic rotation combination experiment was carried out, and the simulation test results available:cutting resistance as the blade Angle increases, decreases with increasing sliding cutting Angle and decreases with the increase of cutting speed; Cutting energy consumption with the blade Angle increases, decreases with increasing sliding cutting Angle, along with the increase of cutting speed increases.(5)Miscanthus stem to make use of home-made cutting test unit test, test results show that under a certain cutting speed, circular saw blade is larger than two tooth blade cutting rate. Regardless of circular saw blade or two toothed blades cut rate all increase with the increase of cutting speed. To ensure the cutting off rate, cutting speed should be greater than430RPM, circular saw blade should be adopted.