RESEARCH OF DYNAMICS OF HYDRAULIC DRIVE WITH HYDRAULIC DISTRIBUTOR
Keywords:
hydraulic cylinder, dynamic model, mathematical modelling, dynamic loads, hydraulic driveAbstract
The dynamic model of hydraulic drive of double-acting is considered in the work. The model consists of a hydraulic
cylinder, a hydraulic distributor, a hydraulic pump and hydraulic pipelines. The mathematical model in the form of a
single-mass dynamic system, a hydraulic drive of double-acting is constructed. The mathematical model is
constructed taking into account the compressibility of the working fluid, the rigidity of the elements of the hydraulic
system and the forces of viscous and semi-dry friction. The hydraulic distributor is considered as the control
equipment of the double-acting hydraulic cylinder. It redistributes the flow of the working fluid in the hydraulic
system, as well as changing the speed of movement of the piston rod of the hydraulic cylinder. Moving the valve
spool relative to the housing forms a cross-section between the edges of the valve spool and the inlet and outlet ducts
of the housing. The parameters of the influence of the dependence of the change in the area of the cross-section
formed between the edges of the valve spool and the inlet and outlet channels of the housing during the mode of
start, acceleration and exit to steady motion are analysed. Their significant influence on the occurrence of dynamic
loads during the transitional period in the hydraulic system is revealed. Dynamic loads, in turn, adversely affect the
hydraulic system elements and, accordingly, the mode of movement of the cylinder piston rod. The result of this
work is the solution of a mathematical model of a dynamic hydraulic drive system. The simulated results are
presented graphically for ease of analysis.
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