Analysis and Experimental Study of Median-Nonlinear Flow Characteristics in Hydraulic Proportional Valve

DOI

10.2991/lemcs-15.2015.75How to use a DOI?

Keywords

Proportional valve; Median overlap; Flow control; Nonlinear flow; Nonmatching response

Abstract

The nonlinear flow characteristics induced by the geometrical features in various flow areas are often ignored. The strictly dynamical symmetry assumption is not sufficient to design the hydraulic control system by adopting the proportional valve, and the research about the proportional valve model can be used in all moving areas and all covered types of spool is deficient. To overcome this problem, the uniform nonlinear flow mathematical model for the electro-hydraulic proportional valve is constructed. The relational expression between the orifice flow of the proportional valve and the geometrical future and physical characteristics of spool is constructed to obtain a series continuous nonlinear flow equations of median positive overlap, negative overlap and zero overlap proportional valve. The experiment validates that, for positive overlap, the flow input into the hydraulic tank is proportional to the displacement of the spool in the dead zone. For negative overlap, even though the spool located at the median, the flow output also exists, and induces the piston movement of hydraulic tank. This situation is consistent with the non-matching overlap response of actual negative proportional valve.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Wenhua Jia
AU  - Chenbo Yin
AU  - Dasheng Zhu
AU  - Guo Li
PY  - 2015/07
DA  - 2015/07
TI  - Analysis and Experimental Study of Median-Nonlinear Flow Characteristics in Hydraulic Proportional Valve
BT  - Proceedings of the International Conference on Logistics, Engineering, Management and Computer Science
PB  - Atlantis Press
SP  - 386
EP  - 390
SN  - 1951-6851
UR  - https://doi.org/10.2991/lemcs-15.2015.75
DO  - 10.2991/lemcs-15.2015.75
ID  - Jia2015/07
ER  -