Study On Design And Experiment Of Machine For Shell-Breaking Of Walnut Multi-roller Extrusion

Developing walnut industry is as a key project of enhancing the rural economy, increasing peasants' income, and speeding up the construction of new socialist countryside in recent years in our country. At present the scale of planting, the yield and production value have been ranked in the top in the world, becoming the characteristic economic forestry industry which possessed comparative advantage. With more in-depth development of walnut industry, research and production of issues are also increasingly prominent. The deep processing and development of walnut lags behind the market demand seriously. The manual-based approach of breaking shell has seriously affected the walnut processing quality and efficiency, and the multipurpose utilization of walnut. Therefore, the research for breaking walnut shells has to be conducted, thus to develop a kind of equipment which fits for promoting to be used in our country, and solve the current backward situation of walnut processing technique in our country. In order to design the walnut breaking equipment better, it is essential to fully grasp the various crucial physical parameter and property, thus to provide theoretical foundation for the study of walnut breaking equipment.The physical characteristics of four varieties of walnuts in our country were studied. Make the determination of plan, the design of parts, the overall design and the selection of relevant parameters be more reasonably by carrying out analysis and study on relevant physical characteristics which affect the of walnut shell breaking effect; To obtain that walnut can be oriented on the guide roll and to select relevant parameters of guide roll by carrying out force analysis on the motion situation when walnut is in the guide mechanism and shell breaking work area, the multi-roll extrusion sheel breaking work area designed can take out the kernal by breaking shell, thus to provide theriatical foundation for the design of guide mechnism and sheel breaking device.A kind of multi-roll extrusion shell breaking equipment for walnut is proposed on account of the defect of the extrusion sheel breaking equipment for walnut at home and abroad. This equipment uses the discontinuity extrusion shell breaking method, and the discontinuity multistation extrusion shell breaking work area, formed by the shell breaking roll and muiti-twin supporting shell breaking rolls in descending order, to take out the kernel through breaking shel.This study describes the characteristics of its structure and working principle as follows:the brush installed in the outlet of the workbin rotates and drives the walnuts in the workbin to land on the guide roll uniformly and lay out by monolayer; the guide mechanism is able to orient the the walnut effectively, make the long axis of the walnut coincide with the sheel breking roll, so that the walnut can roll with the the shell breaking roll in the sheel breaking work area; This equipment uses the discontinuity multistation extrusion shell breaking work area, formed by the shell breaking roll and muiti-twin supporting shell breaking rolls in descending order, then the shell breaking roll and the supporting shell breaking rolls rotate to make the force direction be accordant in the sheel breaking work area, this will not cause the walnut fall apart half; the discontinuity esxtrusion is chosed to ensure the walnut kernel will not be squeezed during the process of the breaking the shell; the extrusion space governor mechanism can change the size of the shell breaking work area, so that to adapt to different variety and size of walnuts. To obtain the egression equation and the optimal scheme under different test index by the quadratic egression orthogonal test of the multi-roll extrusion shell-breaking equipment for walnut.