Tarasenko T. Hydraulic driven cavitation generators of pulsation pressure for cleaning hydraulic systems elements.

Dissertation is development of scientific base of calculation and rational choice of parameters and characteristics of hydraulic driven cavitation generators of pulsation pressure (СGPP). The physical model of cavitation pressure fluctuations generation is specified in throttle elements of CGFP: the calculation chart of stream of liquid flow is offered with the breaks of wholeness as the added cavities and moving cavities. On the basis of this physical model and offered calculation chart ana-lytical dependences are first considered for calculation the degree of acceleration of cavitation stream of working liquid in the throttle device of СGPP, estimations of volume of the selected air in the area of cavitation, and also scope of cavitation pressure pulsations from the relative overfall of pressure on a cavi-tation generator. The perspective method of cleaning the inward surfaces of pipelines is patented and recommenda-tions are developed in relation to rational configuration of СGPP for realization of processes of cleaning the elements of hydraulic drive from contaminations. By experimental way a spectral descriptions of CGPP has bein achieved and freguencies with maximum pulsation process have bein installed, cavitation pressure fluctuations in СGPP and relative pressure drop on the throttle element of generator, the influence of parameters of СGPP on the scope of cavitation pressure pulsations are exposed. The estimation of influencing of the cleaning modes is given by development of cavitation erosion on surface of elements and aggregates of hydraulic drive made from different structural materials. Scientifically grounded engineering method and program of calculation on PEOM parameters and descriptions of СGPP and also recommendationis given in relation to the choice of the rational modes of cleaning with the purpose of preventing the cavitation corrosion of structural materials is developed. The results of the conducted researches are applied in industries at the Zhitomir mechanical plant in the technological process of repairing mobile machines, in "Kiev Central Design Bureau of Valves" in the technological process of fittings production. Keywords: hydraulic drive, generator, liquid flow, cavitation, difference of pressure, cleanings, throttle device, scope and frequency of pressure pulsation.