Waveforms analysis and optimization of new electro-hydraulic excitation technology

Abstract

A new electro-hydraulic exciter that consists of rotary valve and micro-displacement double-functioned hydraulic cylinder was proposed to realize different kinds of waveforms. Calculated fluid dynamics (CFD) simulation of rotary valve orifice reveals that orifice exists the two-throttle phenomenon. According to the finding, the revised flow area model was established. Vibration waveforms analysis was carried out by means of mathematic model and the related experiments were validated. Furthermore, as a new analysis indicator, saturation percentage was introduced first. The experimental results indicate that the revised flow area model is more accurate compared to the original one, and vibration waveforms can be optimized through suitable spool parameters and the revised cylinder structure.

Keywords

rotary valve / micro-displacement double-functioned hydraulic cylinder / two-throttle phenomenon / revised flow area model / saturation / drift motion

References

[1] JohnJ S. How do hydraulic vibrators work [J]. European Association of Geoscientists & Engineers, 2010, 58(1): 3-18

[2] YangG-l, WenC-ping. Shaking table test study on dynamic response of slope with lattice framed anchor structure during earthquake [J]. Journal of Central South University, 2012, 15(4): 121-126

[3] AnastasopoulosI, GeorgarakosT, GeorgiannouV. Seismic performance of bar-mat reinforced-soil retaining wall: Shaking table testing versus numerical analysis with modified kinematic hardening constitutive model [J]. Soil Dynamics and Earthquake Engineering, 2010, 30(10): 1089-1105

[4] XiangJ, HeD, ZengQ-yuan. Analysis theory of spatial vibration of high-speed train and slab track system [J]. Journal of Central South University of Technology, 2008, 15(1): 121-126

[5] LiuC-s, ZhangS-m, ZhouH-p, LiJ, XiaY-f, PengL-p, WangHong. Dynamic analysis and simulation of four-axis forced synchronizing banana vibrating screen of variable linear trajectory [J]. Journal of Central South University, 2012, 19(6): 1530-1536

[6] CuiJ, DingF, LiQ-peng. Novel bidirectional rotary proportional actuator for electrohydraulic rotary valves [J]. IEEE Transactions on Magnetics, 2007, 43(7): 3254-3258

[7] CuiJ, DingF, LiQ-p, LiYong. High-pressure bi-directional rotary proportional solenoid for rotary servo valve [J]. Chinese Journal of Mechanical Engineering, 2008, 44(9): 230-235

[8] RuanJ, LiS, PeiXiang. 2D digital simplified flow valve [J]. Chinese Journal of Mechanical Engineering, 2004, 17(2): 311-314

[9] RuanJ, LiS, PeiX, YuZ-qing. Stage control and nonlinearites of digital valve [J]. Chinese Journal of Mechanical Engineering, 2005, 41(11): 91-97

[10] MarcusB LRotary servo valve: US, 1999

[11] BradleyG H, TimothyG ORotary valve: US, 2002

[12] WeiY-ding. Approximate analytical solution of waveform distortion of ultralow frequency standard vibrator [J]. Journal of Vibration and Shock, 2000, 19(3): 49-51

[13] GongG F, LiuY, LiuG B, MinC Q, YangH YA new spin valve for electro-hydraulic exciter: CHN, 2010

[14] GongG F, MinC Q, LiuY, YangX LMicro-displacement double-functioned hydraulic cylinder: CHN, 2011

[15] GongG F, YangL Y, LiuG B, LiuX H, MinC Q, YangZ W, LiuY, YangH YA new type of tamping device with hydraulic excitation and independent clamping movement: CHN, 2010

[16] JosefTBallast tamping machine and method for tamping a railway Track: (AT) EP, 2004

[17] JohnM, PeterYSingle shaft tamper with reciprocating rotational output: US, 2002

[18] MinC Q, GongG F, LiuY. Design and simulation research on new tamper based on ADAMS [C]. 2010 International Conference on Digital Manufacturing & Automation, 2010, Hunan, IEEE Press: 494-498

[19] HanD, GongG F, LiuY. AMESim based numerical analysis for electrohydraulic exciter applied on new tamper [C]. 2012 International Conference on Digital Manufacturing & Automation, 2012, Guangxi, IEEE Press: 11-18