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3 Quality Production Improvement - QPI

3 2019

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Quality improvement of a safety valve with the use of numerical and experimental studies

Filo Grzegorz, Domagała Mariusz, Lempa Paweł, Fabiś-Domagała Joanna, Kwiatkowski Dominik, Momeni Hassan

Quality Production Improvement - QPI

2019

Vol. 1, Iss. 1

378--385

This article presents results of numerical modelling, simulation and test bench experiments of a hydraulic direct-acting relief valve was used as a safety valve. The analyzed safety valve was placed in a system consisting of a fixed-speed pump, a control valve, a hydraulic cylinder as an actuator and a second pressure valve in the load line used as a payload generator for the cylinder. In the first step mathematical model of the system was formulated in the form of a system of ordinary differential equations. Next, simulation model was created in Matlab/Simulink. Simulations were carried out for different values of the actuator payload. The obtained results include time series of pressure, flow rate and displacement of the actuator piston. In order to confirm simulation results, a test bench was built and series of experiments were carried out. High compliance of simulation and laboratory results was obtained. It was confirmed that the proposed solution with the relief valve used as a safety valve fulfills its task of protecting the hydraulic system from excessive pressure increase.

Numerical simulation of fluid flow inside the flow control valve

Domagała Mariusz, Momeni Hassan, Fabis-Domagała Joanna, Krawczyk Mariusz, Filo Grzegorz, Bikass Saeed

Quality Production Improvement - QPI

2019

Vol. 1, Iss. 1

394--399

Hydraulic valves are widely used in many branches and they are still developed and improved. Due to the problem with verification of flow phenomena which appears during valves operation numerical simulations methods are tools which allows to improved valves design. This paper presents numerical simulation of fluid flow inside flow control valve.

Matrix FMEA analysis of the flow control valve

Fabis-Domagala Joanna, Momeni Hassan, Domagala Mariusz, Filo Grzegorz, Bikass Saeed, Lempa Paweł

Quality Production Improvement - QPI

2019

Vol. 1, Iss. 1

590--595

Reliability is a key feature in engineering systems and might be improved by using preventive methods, which allows for identification potential failures and establishing cause-and-effect relationships in consistent and systematic way. One of the popular quality improvement method is FMEA (Failure Modes and Effects Analysis). An application of matrix FMEA analysis method on example of flow control valve has been presented and discussed in the work. Presented example shows also a different ways of evaluating failures and theirs influence on analysis results.