THE NEW DESIGN OF THE DISPENSING SYSTEM PNEUMATIC SOWING MACHINE
The analysis of designs of the pneumatic sowing devices working at excessive pressure of an air stream testifies to manifestation of the following shortcomings in their work: 1. It was found that the use of metal ejectors to remove excess seeds fixed in the lower part of the sowing disc is associated with the risk of damage to the seeds; 2. With a probability to 5% the influence of the directed air stream on the removal of “excess” seeds from the cells of conical shape (with the exception of one provided by the user manual) not infrequently blows out air flow all seeds, including grains of the same cells in a conical shape. In this case, count the number appear in the gaps, resulting in reduced productivity that need to be addressed. The present research is devoted to solving the above-mentioned problem issues with the help of new designed design elements that allow to exclude the possibility of seed damage and sowing omissions when operating pneumatic sowing machines at excessive air flow pressure. In addition, the developed design provides for the possibility of changing the sowing schemes without replacing the sowing discs. For universalization of the process, a sufficient condition is the use of conical shaped plugs for cells made of an elastic material (polyvinyl chloride) and structurally containing spring-loaded feet with an extraction ring.