Wyniki 1-1 spośród 1 dla zapytania: authorDesc:"Yevheniy І. IVASHKO"

Terms of the stability for the control valve of the hydraulic impulse drive of vibrating and vibro-impact machines DOI:10.15199/48.2019.04.04

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For realization of the most effective modes vibrating influence on the processed materials and the environment is perspective vibrating (VM) and vibro-impact machines (VIM) with hydroimpulse drive (HID) [1]. The main part of the HID is pressure pulse generator, or valve-pulser (VP) [2], which provides control the operation mode of the vibrating machine. Experimental data and practice operating of hydraulic components VM and VIM, controlled by valve-pulsators, show, that under certain conditions in dynamic system stable self-oscillation processes are excited. Therefore, it is important in the theoretical and applied aspects explore the conditions of excitation and the existence of selfoscillations. These issues have particular importance when developing rational constructions of hydraulic VM and VIM. The paper [3] presents the results of the research of pressure and lateral exertion on the piston valve. The obtained results are based on the equation Reynolds and equation Navier-Stokes, are compared with variations in the aspect ratio, cross-sectional area. This research purpose is to justify the use of the equation Reynolds for the analysis operating of the piston valve during cavitation. But application the equation Reynolds and equation Navier- Stokes does not allow the develop clear analytical criteria for determine the conditions for the work stability of the piston VP. In work [4] the static and dynamic behavior of the pressure control valve with nonlinear negative characteristics is investigated. This pressure regulating valve has the property of both reducing and increasing the pressure at the outlet and actuated by a solenoid. The presented model and linear analysis explains the negative spring constant force in the low-frequency range. The fluctuations of this pressure control valve are based on the principle excitatory force, but the operation of the VP, constructively based on the principle feedback on pressure.[...]

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