Theoretical Aspects regarding the Pressure Safety Valves Operation within a Hydraulic Circuit
Journal Title: HIDRAULICA - Year 2018, Vol 0, Issue 1
Abstract
Construction and agricultural machinery and equipment drives are currently accomplished by means of high-performance hydraulic and pneumatic systems through which difficult workloads are easily performed. Such systems have evolved over time, being indispensable from the basic functional machinery aggregate. In research-driven development there is a continuous increase in working power based on the increase of working pressure values inside the hydrostatic circuits used. Primary components represented by pumps, motors, distributors need protection during the circuit operation at medium and high pressure values. This overpressure protection is carried out by means of safety valves or pressure valves that are able to send part of the working fluid flow rate to the plant tank adjusting the pressure to a value at which the plant components are able to operate safely. A pressure valve assembly model is shown in this paper with spherical and tapered locking elements which have the possibility to perform translational movement inside the valve body in this way achieving the valve opening when the pressure values in the circuit exceed a certain set value. A numerical analysis of the working fluid flow through the valve body is made and the results are presented in terms of pressure and velocity of the working fluid, depending on the position of the spherical locking element.
Authors and Affiliations
Fanel Dorel SCHEAUA
Keywords
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