Design Optimization of Hammer Blade Crusher to Improve the Crushing Performance

Abstract

China is a large agricultural country, each year will produce a large number of straw. The recycling of straw to China's agricultural development and environmental protection are very helpful, the recycling of straw is mainly energy, fertilizer, feed several uses, different uses need different crushing fineness, so adjust the crushing fineness can improve the recycling rate of straw. This paper mainly on the impact of straw crushing fineness factors for This paper focuses on the theoretical analysis and study of the factors affecting the fineness of straw crushing, and provides a general design plan for the crushing chamber.Firstly, the effect of different hammer and sieve gaps on the pulverisation fineness is studied and the straw pulverisation fineness is changed by changing the hammer and sieve gaps. The effect of hammer blade material, structure, arrangement, distribution density and hammer blade speed on the fineness of the straw is studied. Study the effect of the aperture size and arrangement of the sieve on the fineness of the crushing, and adjust the fineness of the crushing by changing the aperture size of the sieve. The study of the material in the crushing process generated by the "ring flow layer" mechanism, and by changing the shape of the crushing chamber structure to destroy the "ring flow layer" on the impact of the crushing performance of the crusher.Secondly, according to the production requirements of the hammer mill, the structure and material of the hammer blade and screen plate are designed and selected, and the hammer blade is analysed statically using Ansys, the rotor is analysed modally, a complete model of the crushing chamber is designed, and a three-dimensional model of the crushing chamber is built using SolidWorks.Finally, after simulation calculations, the design of the rotor headquarters structure is reasonable. An adjustable hammer and sieve clearance was achieved, reducing costs and improving the efficiency of the pulveriser crushing.