Berezhnyi O. Improvement of the Jet-Reactive Pneumatic Unit Performance on the Basis of Work Process Model Refinement

The thesis offers a new solution of the applied research task, which consists in the usage of the jet-reactive pneumatic unit as an executive device of pneumatic units in different spheres of the national economy, as well as in the refinement of the work process mathematical model and in the development of method of the item calculation of losses in the flow part of the jet-reactive expansion machine that allows one to determine geometrical parameters of the flow part and create a unit with high efficiency. The experimental research of the jet-reactive pneumatic unit was performed; the results confirm the adequacy of the mathematical model and complement the algorithm for calculating operating (output) characteristics of the JRPU and pneumatic actuator as a whole. The pneumatic actuator algorithm and design technique were developed on the JRPU basis for ball valves of the cross-country pipelines with large clear openings (DN>300 mm).