Результати експериментальних досліджень параметрів процесу змішування сипких матеріалів

Abstract

Наведено будову спроектованого та виготовленого гвинтового змішувача для проведення експериментальних досліджень процесів змішування сипких матеріалів гвинтовими конвеєрами а також результати експериментальних досліджень змішування сипких матеріалів. За їх результатами побудовано графічні залежності коефіцієнта неоднорідності суміші від частоти обертання шнека, коефіцієнта завантаження та кута нахилу змішувача.

Screw transporting manufacturing mechanisms are widely applied in different branches of the national economy for transporting, mixing, sorting, grinding, etc. However, the efficiency and quality of these manufacturing processes are linked with the construction peculiarities of these systems in accordance with the power consumption. Therefore, to provide the efficient and qualitative operation of these processes proper choice of certain parameters of their performance and construction characteristics, as well as specially constructed experimental installation have been carried out. The main variable factors affecting the process of oats and vetch mixing were the following: mixer loading factor К3=0,3...0,5 (хі), screw rotation frequency п=50...250rot/min. (х2), and mixing time t=20...60c (х3). To provide the experimental installation operation the program Power Snite was used for tuning the Altvar series frequency converter, in which the selection of those characteristics, which were required to carry out experiments according to the developed method of testing was done. Presented results of investigation were displayed on the PC screen as the table and graph dependencies in the percentage relation to the nominal capacity with the predetermined frequency. Basing on the carried out investigations of the response function (optimization parameter), that is, vetch and oats mixing heterogeneity in cyclic mixing Vc=f(k3, n, t), found experimentally, are presented as the mathematic model of complete square polynom and regression equations in the code and full sizes are deduced. According to the results of these investigations graphic dependences of the vetch and oats mixing heterogeneity size on the load factors, rotation frequency and other screw parameters as well as operating time, have been built.