The paper shows that it is possible to increase the efficiency of a vertical screw mixer of bulk materials and reduce costs by determining the required size of the feeding hole in the lower part of the casing, as well as by installing a screw flange with a reverse winding in relation to the screw spiral inside the screw casing and by installing a replaceable tip with a variable lead angle at the lower end of the screw. The analysis of the process of screw loading in the hopper allowed us to obtain an analytical dependence to determine the required size of the feeding hole, in which mixed materials freely enter the screw spiral. It is proved that the placement of the screw flange on the inner surface of the casing increases the driving force of material by 1.05 – 1.80 times depending on the screw speed, which significantly reduces specific energy consumption for preparation of mixture of the desired quality. The paper provides the formula for calculating the angle of installation of the flange with respect to the screw spiral, in which the maximum effect of the flange on the mixed materials is obtained. In order to ensure the effective capture of mixed materials in the loading zone of the screw, it is proposed to perform the first spiral turn from the lower end of the screw with a variable lead angle and place it on a replaceable tip. A technical solution to the placement of spirals on the double-threaded screw is also proposed.
The article analyzes the issues of selecting objects for creative projects in the framework of training students - future teachers of technology. As a result of the analysis of psychological and pedagogical literature, it was revealed that attempts to develop such criteria were made in the Soviet pedagogy dealing with the issues of labor training. The optimal criteria for the selection of objects of creative project activity, from the point of view of the future professional activity of students, are described. The experience of cooperation between students - future teachers of technology and industrial enterprises of the Lipetsk region in the framework of improving the technological education of students is shown.
The article is devoted to the analysis of information related to the assessment of police activities during the coronavirus pandemic in social networks and the blogosphere. The material service Medialogia, as well as content analysis of social media Yandex Blogs & Google-trends the authors examine some of the key quantitative and qualitative indicators in the information field as well, informational reasons related to the assessment of the activities of the police.
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