Design And Test Of Husking Device For Camellia Oleifera

Camellia is the unique quality of woody oil crops in our country, occupy the important position in the agricultural planting structure in our country.Camellia shell in the process of oil will affect the quality of tea oil, thus which shoud be shelled before further processing.Existing camellia nut sheller varieties mostly adopt the principle of extrusion, shear, which existing poor adaptability, high injury rate, low net rate of technical problems and so on. In this paper, a kind of camellia fruit sheller test-bed was designed according to the principle of impacting and rubbing, and an experimental study was carried out with nuts hulling rate and breakage as evaluation index,.The main content of the paper is as follows:(1) The experimental research of fruit physical characteristics:Determination of fresh fruit and nuts in detail physical properties such as appearance size, moisture content, and the results are descriptive statistics analysis; A camellia fruit shell related mechanical properties test which using electronic universal testing machine was carried out, the test indicates that the main factors affecting camellia fruit breaking force include the loading direction and loading rate, moisture content of fruit and differential fruit diameter size.(2) The theory fruit impact analysis of camellia shell and design of percussive hulling test-bed:According to the theory of Hertz, camellia fruit shell impact was carried on the kinematics and dynamics analysis, the test indicates tha the main factors influencing the impact hulling impact in addition to associate with camellia fruit itself characteristic, and also include the impact velocity and feed rate.The detailed design of centrifugal plate, gear ring key shell parts and related accessories was constructed.(3) The impact test research of hulling camellia fruit:Through to the fruit shell impact of the single factor test and research, analyzing the influence degree of various factors on the hulling indicators. The hulling speed within 600-700 r/min was the most obvious impact on hulling rate, with the increase of rotational speed, hulling rate has increased dramatically, within the scope of the 700-1000 r/min, as the speed increases, hulling rate increase rate decreased significantly, and damage rate increased with the increase of rotational speed all the time;Camellia fruit moisture content had a greater influence on the hulling rate, which effect on the damage rate is relatively small, hulling rate decreased with the increased of moisture content;The influence of feed rate on hulling rate and damage were relatively obvious, with the increased of feed rate, both of them decreases.The regression analysis on the test data obtained the influence factors and hulling rate which formed the regression model between the breakage.On the basis of single factor, the orthogonal experiment was carried out. Analyzed the various factors influence on hulling rate and the damage rate significantly. The optimal combination of the test factors was Determined, including hulling speed as 700 r/min, camellia fruit moisture content as 43.7%, feeding rate as 288 kg/h.(4) High-speed photography and verification test:By high-speed camera technology captured the trajectory when centrifugal plate of camellia fruit hiting gear ring in the hulling device, further verifying the above test results.