Design,and Experimental Research On The Broken Camellia Fruit Roughing Machine

Oil-tea tree is a Chinese-specific woody oil plant, which is honored as the Oriental olive oil. Its shell contains no grease, and needs to undergo the process of shelling and sorting within one to two weeks after being gathered. In last several years, due to the expanding of oil-tea tree planting area, mechanical breaking industry of tea-oil tree develops rapidly. After mechanical breaking, the size and shape of the mixture of broken shell and seeds remains different, making it difficult to separate and select the broken shell and seed. There is no mature oil-tea fruit separator. With the mechanization of oil-tea fruit industry, the research and development of separator gains great practical significance.1) Squeezed and scrubbed oil-tea fruit planted by Hunan Xuefeng mountain of oil-tea tree cooperation is chosen as the object of this study. After examining in detail the shape, size, moisture content, density and sliding angle of oil-tea fruit, shell and seeds, I figure out that the separation process consists of roughing and concentration.2) Based on the distinction between the mixture of oil-tea fruit’s shell and seeds, I designed oil-tea fruit roughing machine. It is concluded from the experiment that the size of sieve pit ranges from 29mm to 32mm, the screen is 800-1100 mm in length and 600mm in width; through mechanism optimization, I found out that the length of crank is 30 mm, connecting rod is 400 mm, short rocker is 730 mm, adjustable long rocker is 800-900 mm, and the distance from the screen of short rocker and that of long rocker is 1000 mm.3) Designed a prototype of the roughing machine, and by calculating, analyzing and experimenting, I figured out that the rotation speed ranges from 250 to 350r/min; I established mathematical model of the roughing machine and carried on simulation test with MATABL/Simulink; according to the test result, I chose Y-160M1; I carried on simulation test with ADAMS/View, and worked out the instantaneous curve of the material’s displacement, speed and accelerated speed, and the design of amplitude proved to be reasonable.4) Conducted experimental study of the mechanic performances and design quadratic universal rotary assembly experiment by making use of statistics to validate and optimize the parameter; by using multivariate regression analysis and response surface methodology, I analyzed the prediction model of the established influence factor and properties; then conducted verification test on the optimal factor combination, that is, when the crank speed is 281.81 r/min, the incline angle of screen surface is 7.14°, and the screen length is 1075.53 mm, the size of sieve pit is 30.61 mm, the retention rate of seed reaches 96.85%, the screening efficiency is 96.86%, and the shelling rate is 43.67%; therefore the oil-tea fruit roughing machine meets the design requirement.