Browse > Article
http://dx.doi.org/10.7839/ksfc.2015.12.3.052

Development and Verification of Analytical Model of a Pilot Operated Flow Control Valve for 21-ton Electric Excavator  

Kim, D.M. (Department of Mechanical Engineering, Gachon University)
Nam, Y.Y. (Korea Institute of Machinery and Materials)
Seo, J.H. (Korea Institute of Machinery and Materials)
Jang, J.S. (Department of Mechanical Engineering, Gachon University)
Publication Information
Journal of Drive and Control / v.12, no.3, 2015 , pp. 52-59 More about this Journal
Abstract
An electro hydraulic poppet valve (EHPV) and a variable orifice poppet are assembled in a single block, which is referred to as a RHINO but is also generally called a pilot-operated flow control valve. In this study, we analyzed the structure and the operating principle for a RHINO applied in a 21-ton electric excavator system. The RHINO was experimentally tested to measure the dynamic responses and the pressure energy loss. In this test, we investigated the variation in the conductance coefficient according to the increase in the supply pressure under a constant current and a variation in the flow rate according to the increase in the current. Then, the geometrical shapes and the spring stiffness of the RHINO were considered to develop an analysis model. The characteristics (current-force and hysteresis) for the solenoid based on the experimental data were reflected in the analysis model that was developed, and the reliability of the analysis model was also verified by comparing the experimental and analytical results. The developed model is thus considered to be reliable for use in a wide range of applications, including optimum design, sensitivity analysis, parameter tuning, etc.
Keywords
Electronic Excavator; Pilot-Operated Flow Control Valve; Electro Hydraulic Poppet Valve; Analysis Model;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 S. D. Park, "Global Warming and Climate Change : An Overview of Technological Solutions," J. of Korea Society of Energy & Climate Change, Vol.1, No.1, pp.1-12, 2006.
2 H. J. Lim, S. G. Jung and D. H. Wan, "An Analysis of the Impact of Global Warming on Residential Energy Consumption : Focused on the Case of Electricity Consumption," J. of Korea Energy Economics Institute, Vol.12, No.2, pp.33-58, 2013.
3 B. I. Kang and J. S. Lee, "Boom Energy Regeneration System of Hybrid Excavator Using Simulation Technique," J. of Korean Society for Fluid Power and Construction Equipments, Vol.7, No.2, pp.12-18, 2010
4 J. I. Yoon et al., "Development of Hybrid Excavator for Regeneration of Boom Potential Energy," J. of Korean Society for Fluid Power and Construction Equipments, Vol.6, No.4, pp.1-8, 2009
5 J. H. Lee, J. H. Lee, H. C. Lee, and C. E. Oh, "Integrated Control Algorithm of Hydraulic Pump with Electric Motor to Improve Energy Efficiency of Electric Excavator," J. of Korean Society of Mechanical Engineers, Vol.39, No.2, pp.195-201, 2015   DOI
6 B. S. Yoo, C. M. Hwang and J. S. Joh, "A Study on the Energy Management Control of Hybrid Excavator," J. of Korean Society for Precision Engineering, Vol.29, No.12, pp.1304-1312, 2012   DOI   ScienceOn