Experimental Study And Design Of Dual-power Rotary Vibration Type Tomato Separation

Industrial development of processing tomato requires adequate supply of raw materials. There is contradiction between longer artificial tomato harvesting period, increased labor costs year by year and large-scale industrial processing tomato which does not meet the needs of modern tomato industry. Mechanized harvest provides a good solution to this problem, which can ensure adequate supply of cheap raw materials, reduce costs and improve market competitiveness. China mainly imported tomato harvester based, it can be seen that the high purchase and maintenance costs of imported tomato harvester, poor applicability and the domestic machine failure rate, poor reliability, were at the pilot study stage, it can not meet the industrial development of China’s processing tomato from China nearly 20 years of experience in the development of mechanized harvesting tomatoes. The tomato separation is one important part of mechanized harvesting, were realization of tomato fruit and stems separated, can directly affect the performance of the whole machine and farmers’ economic benefits; The machine imported fruit separation device with poor adaptability, while the domestic machine results in poor separation, the separation rate is low, the breakage rate and impurity rate higher problems. Studying of the tomato harvester of China’s processing tomato industry is particularly important in order to improve tomato processing products in the international market competitiveness and promote China’s "red industry" sustainable development. Therefore, this paper uses theoretical and simulation analysis and experimental research method of hybrid vibration and rotary type tomato fruit separation device were designed and studied, the results and conclusions obtained are as follows:1) This article studied biomechanical properties and mechanical properties of the test processing tomato, analyzed and collected the data about their cropping patterns, botanical characters, fruit traits and got biomechanical traits of tomato plants. The pilot study of force and breakage of processing tomato fruit seedlings were tested and obtained the range of separating force and damage of tomato fruit. Get the separation angle was 90°of tomato fruit and vine separation material mean 15.8N; Fruit transverse breakage stress mean 46.9N, longitudinal breakage stress mean 55.2N; Pericarp hardness mean 2.86kg/cm2.2) The fruit seedling process of rotary vibrancy device of fruit seedling was analyzed, and the mathematical model was established. The minimum damage value of the processing tomato fruit was 18.5 N·s, and the minimum separation impulse was 2.3 N·s.3) This article did the principle design research on separation device of hybrid rotary vibrating tomato fruit seedlings, designed hybrid fruit seedling separation device with variable parameters; On variable parameter vibration exciter excitation mechanisms of the derivation of the mathematical model, established the eccentric block of the simplified model to got the angle velocity and angle acceleration mathematical model of the vibrator shell, by simulation analysis method to verified the correctness of the mathematical model; The motion law of the exciter was simulated, and the mass of the eccentric block was 40kg, the spindle speed was 350r/min, and the vibration rod can obtain a large amplitude; The variable parameters of the roller assembly of theory analysis and simulation research, got vibrating rod and cylinder relative angle greater than 15 °can put the tomato seedling stems discharged smoothly; Circumferential vibration rods to be greater than 25 can effectively vibration; vibration coil spacing was less than 100mm is conducive to the separation of tomato.4) The dual dynamic vibration and rotary type variable parameter of tomato fruit separation device was developed. Using the theory and the method of simulation analysis, obtained the motion law, provide reference for determining the experimental factors.5) Fruit seedlings of hybrid test bench were studied, we designed two orthogonal pilot program to test the results of the use of range, variance and multivariate regression analysis, got the optimal test program. We verified, compared and analyzed the two optimal test programs and ultimately determined the optimal combination of hybrid fruit seedling separation apparatus:exciter spindle speed 342.9r/min, eccentric weight 40kg, rotation speed 22r/min, the feed amount 19kg/s, on the premise of meeting the production requirements. At this time, the fruit separation rate was 98.37%, the breakage rate was 3.37%, and the content of the impurity was 4.17%.6) Based on the optimal parameter combination of the vibrating rod parameters were studied, it obtained the vibration rod elastic modulus 8300N/mm2, vibrating rod length 450mm, the vibration rod relative to the cylinder angle 15°, tomato fruit seedling separation effect better.