On substantiation the parameters of grain screen of centrifugal-sieve separator when operating in wild-oat separator mode

Abstract

In the technological lines of mechanized thrashing floors, the existing separators with flat screens and punched calibration holes as well as indented cylinders with cellular surfaces reached the limit of their development. This is shown by a large number of scientific studies in the field of grain separation. One of the promising areas of research and practical development of grain cleaning equipment is centrifugal-screen separation. The use of centrifugal forces while ensuring continuous sliding of the grain material and full loading of the working surface of the screen is a promising method of separation. The specific output of a centrifugal cylindrical grain screen is 2.7...3.0 times higher than that of an oscillating flat screen. High output of centrifugal-screen separators and the cleaning efficiency that meets the standards are ensured by the integrated use of all components of the inertial-gravitational field and the rational design of the working bodies. The main distinguishing feature of the separator is the absence of oscillating working bodies that are not subject to vibration. This separator uses fundamentally new working elements enabling to reconfigure technological schemes of operation. The centrifugal-sieve separator operating in the wild-oat separator mode may be used in flow lines for handling food grain instead of indented blocks with cellular working surfaces. It is advisable to conduct further research in the direction of improving the operation based on this separation principle and to combine the operation of the cylindrical grain sieve and the air flow. The above technical and technological solutions are partially implemented in the proposed centrifugal-sieve separator. When manufacturing the separator at a specialized enterprise, it is possible to improve the quality of the spiral, its fastening to the separating surface of the cylindrical sieve, and also to fulfill all recommendations for the operation of the ring brush.