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International Standard Serial Number:
ISSN 1001-4551
Sponsor:
Zhejiang University;
Zhejiang Machinery and Electrical Group
Edited by:
Editorial of Journal of Mechanical & Electrical Engineering
Chief Editor:
ZHAO Qun
Vice Chief Editor:
TANG ren-zhong,
LUO Xiang-yang
Tel:
86-571-87041360,87239525
Fax:
86-571-87239571
Add:
No.9 Gaoguannong,Daxue Road,Hangzhou,China
P.C:
310009
E-mail:
meem_contribute@163.com
Abstract: Due to the strong time-varying load condition of fully mechanized mining face, the support hydraulic system will cause large speed fluctuation when moving the support, which makes it very difficult to adjust the straightness of the hydraulic support intelligently. To solve the problem, a new type of rotary bypass type digital speed control valve suitable for bracket working condition was designed. Firstly, through theoretical analysis of the rotary bypass type digital control valve, the main relevant parameters affecting its speed control characteristics were obtained. Then, the simulation X model of the digital speed control valve was established. The speed response characteristics of the bypass speed regulating valve under different parameters was quantitatively analyze.Its speed regulating characteristics was studied.
Finally, by building a simulation experiment platform and conducting experimental tests, the influence of load changes on the speed control performance of the speed control valve was analyzed. The results show that when the bypass speed regulating valve is applied to the moving circuit, the fluctuation of moving speed is small. With the increase of spring stiffness, the precompression shrinkage decreases, the speed peak of speed regulating valve decreases, and the less time it takes to reach the stable speed. The speed response curves are different under different load inputs. Under the same peak load, the speed is the largest when sinusoidal load is input. The feasibility of applying the bypass speed regulating valve to the frame moving is provided, which provides a basis for the parameter optimization of the follow-up valve.
Key words: strong time-varying load condition; digital valve controlled cylinder; speed control performance of speed control valve; SimulationX; speed response characteristics; static analysis
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