Majid A. Oleiwi
Abstract
The trend in hydraulic power applications is to improve efficiency andperformance of hydraulic systems parts. This paper examines the performances ofdirect operated proportional pressure ...
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The trend in hydraulic power applications is to improve efficiency andperformance of hydraulic systems parts. This paper examines the performances ofdirect operated proportional pressure relief valve type (DBETR-1X/25). There arelimitations to the closed loop performance of the valve when it is included in avalve-controlled electro hydraulic system.Proportional pressure relief valves are one of fundamental important elementsfor modern hydraulic control systems, which used in protecting all circuit partsfrom damage. These valves decreases costs and can be employed to obtain manydifference pressures by using only one proportional pressure relief valve, whichplays a vital role in automation process. Practical results obtained from this workwere satisfactory and acceptable. The experimental and theoretical resulls arecompared with data sheet from manufacture companies. A small dissimilarity hasbeen found, but it can not be negligible. The results are very important to thedesigners and engineers, who are working in hydraulic proportional systems field,in helping them to calculate losses accuracy and design applicable circuits to arriveactual ideal performance for hydraulic proportional systems and not to absolutelyrely on the company ideal results.The model is simulated using MATLAB SIMULINK model (R2008a) andthe theoretical results are compared to those obtained practically.
