부산대학교 도서관

Aiming at the problems of low quality of milk production and low feeding efficiency caused by uneven stirring of components in total mixed ration (TMR), a vertical screw stirring device for feeding dairy goat was designed. In this study, based on the material properties of TMR for dairy goats, the pitch (S), bottom inclination angle (Z), and rotational speed of the vertical screw (n) and the sidewall angle (β) and loading rate (L) of the mixing chamber were simulated and analysed by the discrete element method, the optimal parameter combination for the system were determined. Furthermore, a testbed of the stirring device was built in accordance with simulation analysis conclusions, verifying the working performance of the device. Results demonstrated that when S = 300 mm, Z = 70°, β = 105°, n = 60 r/min, L = 70 %, the CV of mixing uniformity is 12.95 % and mixing power is 1.35 kW. A test showed that the CV of mixing uniformity was 13.03 %, and that of mixing power was 1.41 kW. These results are basically consistent with the simulation analysis results. The proposed results provide evidence for the design of feeding devices for dairy goats. [ABSTRACT FROM AUTHOR]