Abstract
Aiming at the problems of high-power consumption and insufficient kneading and cutting of roughage in the total mixed ration mixer. In this paper, licorice stems were taken as experimental objects, the horizontal twin-shaft TMR mixer was used to carry out the experimental study. It should be as brief as possible and concise. Through the kneading and cutting process power analysis, determine the influencing factors of kneading and cutting power consumption. The auger speed, processing time and blade type were taken as experimental factors, with standard straw length rate and power consumption as indicators, Box–Behnken test with three factors and three levels was carried out, analysis of variance was performed on the test results, the results show that the significant effect of each factor on the standard grass length is processing time, blade type and auger speed in descending order. The significance of the influence on power consumption from large to small is auger speed, processing time and blade type. The response surface analysis and parameter optimization were carried out, the results show that the auger speed is 20 r/min, the processing time is 29 min, and the blade type is quincunx blade. At this time, the standard straw length was 82.634%; Power consumption 4525.815 kJ, TMR mixer performance reached the best. The results can provide a theoretical basis for the subsequent research and development of TMR mixer.
Highlights
Xinjiang is one of the five pastoral areas in China
The results showed that the total mixed ration produced by different total mixed ration mixers had effects on the performance of dairy cows, and the importance of preparation machinery on the quality of Total mixed ration (TMR) should be emphasized
The power consumption of horizontal dual-axis TMR mixer during operation mainly includes: the work consumed by the friction between the material and the casing surface, the work consumed by the friction between the material and the pressure surface of the spiral blade and the back of the blade, the work consumed by friction between material and spiral auger shaft, the work consumed by twisting, squeezing and friction between crushed licorice stem, and the work consumed by blade cutting licorice stem
Summary
Xinjiang is one of the five pastoral areas in China. With the development of animal husbandry in Xinjiang, the shortage of forage grass resources has become increasingly serious, which has restricted the development of animal husbandry in Xinjiang [1,2]. The influence trends of auger speed, processing time, filling coefficient, blade and bottom shell clearance on grain size, breakage rate and energy consumption per unit mass of liquorice stalk after rubbing and cutting were analyzed. The experimental results were carried out by taking the changes of rotational speed, pitch, and density of the mixing shaft as factors The results of this theoretical study provide structural and technical analysis factors for determining the power consumption of the unit of work driver during the mixer design phase. The overall structure of horizontal dual-axis TMR mixer is shown, which is mainly composed of kneading and shredding device, hydraulic control system and weighing system. Too large or too small helical angle of helical blade will weaken convective mixing in the working process of TMR mixer, and even lead to screw blockage, reducing the quality of feed kneading, cutting, and mixing. 2 rn According to Equation (8), the relative velocity, implicated velocity and absolu6toef v16e‐ locity of the material element are related to the rotational speed of the auger
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