Lebediev A. Increasing the output characteristics of the labyrinth-screw pumps by determining their rational parameters

This dissertation work deals with certain, scientifically grounded and decided task of increase of labyrinth-screw pumps output descriptions due to development of theory of his working process. The physical model of his working process is specified on this basis the developed method of their calculation and planning which includes multicriterion optimization of parameters and does not contain empiric coefficients. In the first time the three-dimensional mathematical model of flow of working liquid is developed in running part labyrinth-screw pump and the got lines of flow and distributing of pressure on his length. Dimensionless criteria are entered for the estimation of workings descriptions of this pump. Two improved constructions of running parts of workings organs are developed labyrinth-screw pump, which allow to promote his workings descriptions and technical level. Found out conformities to law and features of workings processes which take place in to the labyrinth-screw pump and conducted it experimental researches. A theoretical and experimental way is set an instantaneous serve and pulsations of pressure on his output and the maximum limit of gas content of working fluid is certain at which the mode is provided without cavitation. In the first time analytical dependences are got for determination of supply of impermeability of butt-end compression of pump. Set his reliability indexes. For the different constructions of workings organs of pump new mathematical dependences which characterize influence of structural parameters on his descriptions are got. Job performances are inculcated in a number of the specialized enterprises of Ukraine and used in an educational process.