TO THE QUESTION OF TECHNOLOGICAL CALCULATION OF THE CONVEYOR-TYPE BULK MATERIAL SEPARATOR
The task of technological calculation, as you know, is the determination of the main parameters and operating modes of a machine or a working body. The solution of just such a problem for the working body of a combine harvester - conveyor cleaning (separator of grain heaps) is described in the article. Moreover, the calculation methodology is shown on a specific example of determining the parameters and operating modes of conveyor cleaning for a combine harvester of the class of the high-performance domestic machine «Torum 780». The article contains all the analytical expressions necessary for the technological calculation. The calculation established that the mentioned cleaning for such a combine should have a length of 1000 mm, a width of 1364 mm, a sieve speed of 0,78 m/s. Since the grain on the harvested combine field is a heterogeneous medium, and the supply of the threshed crop to the thresher (hence the allocation of the grain heap for cleaning) is variable both in size and in its composition, it is recommended to provide in the design of the cleaning drive the possibility of adjusting the speed of the sieve within 0,6-1,1 m/s to ensure the optimal cleaning load in the conditions of the noted variability of the supply to it.