Abstract
Recently, pneumatic flow control valves having high responses have been developed and are being wide-ly used. It is very important to know the characteristics of the valves for structuring pneumatic servo systems. The method for measuring the dynamic characteristics of the valves has yet to be established, because of the difficulty of the unsteady flow rate measurements of the compressible fluids.In this study, simple methods to measure the input-output characteristics and the frequency characteristic of the flow control valves using an isothermal chamber are proposed. The isothermal chamber is a chamber in which steel wool is stuffed into a normal chamber to make the heat transfer area larger, and could almost simulate an isothermal condition. Therefore, the flow rate could be obtained only by measuring the pressure in the chamber. Two types of servo valves and proportional control valves were tested using the proposed method. At the same time, the spool displacement of the valves were measured. The effectiveness of the proposed method was confirmed by comparing the results obtained from the proposed method and the spool displacement of the valves. In addition, it could be clarified that the frequency response could be measured up to a frequency of 140Hz by this method.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
