Research on Vibration Waveform of Electro-hydraulic Exciter with Rotary Valve Based on Different Valve Port Shapes

Abstract

Abstract: In order to provide the reference for design of valve port shape of electro-hydraulic exciter with rotary valve, rotary valves with triangle valve port, half round valve port and rectangular valve port are designed, and flow area model of three different valve port shapes is established. Based on analysis of the work principle of the electro-hydraulic exciter, mathematical model of the exciter is established, and vibration waveforms of the electro-hydraulic exciter are numerically simulated and experimentally validated. The results indicate that the flow area of rectangular valve port is linear and the flow area of triangle valve port and half round valve port is non-linear. Among the three different valve port shapes, the flow area peak of rectangular valve port is highest and the flow area peak of half round valve port is lowest. The vibration waveform with highest amplitude can be obtained by using rectangular valve port under the condition of the same oil pressure, but the acceleration fluctuation is largest at the same time. The vibration waveform with smallest acceleration fluctuation can be obtained by using half round valve port under the condition of the same amplitude, but the highest oil pressure must be supplied.

Key words: acceleration, amplitude, electro-hydraulic exciter, valve port shape, vibration waveform

WANG He, GONG Guofang, ZHOU Hongbin, LIAO Xiangping, WANG Wei. Research on Vibration Waveform of Electro-hydraulic Exciter with Rotary Valve Based on Different Valve Port Shapes[J]. Journal of Mechanical Engineering, 2015, 51(24): 146-152.

References

[1] 阮健，李胜，裴翔，等. 2D阀控电液激振器[J]. 机械工程学报，2009，45(11)：125-132. RUAN Jian，LI Sheng，PEI Xiang，et al. Electro-hydraulic exciter with 2D valve[J]. Journal of Mechanical Engineering，2009，45(11)：125-132.
[2] 刘毅，龚国芳，闵超庆，等. 新型捣固装置的结构建模与仿真[J]. 浙江大学学报，2011，45(11)：1941-1947. LIU Yi，GONG Guofang，MIN Chaoqing，et al. Structure modeling and simulation of new type of tamping device[J]. Journal of Zhejiang University，2011，45(11)：1941-1947.
[3] REN Y，RUAN J，JIA W A. Output waveform analysis of an electro-hydraulic vibrator controlled by the multiple valves[J]. Chinese Journal of Mechanical Engineering，2014，27(1)：186-197.
[4] 阮健，裴翔，李胜. 2D 电液数字换向阀[J]. 机械工程学报，2000，36(3)：86-89.RUAN Jian，PEI Xiang，LI Sheng. 2D digital directional control valve[J]. Chinese Journal of Mechanical Engineering，2000，36(3)：86-89.
[5] LIU Y，GONG G F，YANG H Y，et al. Mechanism of electro-hydraulic exciter for new tamping device[J]. Journal of Central South University，2014，21(2)：511-520.
[6] 贾文昂，阮健，李胜，等. 电液四轴高频疲劳强度试验系统研究[J]. 兵工学报，2010，31(6)：770-775.JIA Wenang，RUAN Jian，LI Sheng，et al. Electro-hydraulic high frequency fatigue test system[J]. Acta Armamentarii，2010，31(6)：770-775.
[7] 刘毅，龚国芳，闵超庆. 捣固机械激振技术现状与展望[J]. 机械工程学报，2013，49(16)：138-145.LIU Yi，GONG Guofang，MIN Chaoqing. Present status and prospect of tamping device exciting technology[J]. Journal of Mechanical Engineering，2013，49(16)：138-145.
[8] RUAN J，BURTON R T. An electrohydraulic vibration exciter using a two-dimensional valve[J]. Journal of Systems and Control Engineering，2009，223(2)：135-147.
[9] REN Y，RUAN J，YI J Y. Analysis on the excited waveforms of an electro-hydraulic vibration exciter using a two dimensional valve[J]. Noise and Vibration Worldwide，2010，41(10)：59-64.
[10] 李伟荣，阮健，任燕. 2D阀控差动缸式电液激振器振动波形研究[J]. 农业机械学报，2013，44(10)：266-271.LI Weirong，RUAN Jian，REN Yan. Vibration waveform research on electro-hydraulic exciter of differential cylinder controlled by 2D valve[J]. Transactions of the Chinese Society for Agricultural Machinery，2013，44(10)：266-271.
[11] 韩冬，龚国芳，刘毅，等. 基于不同阀芯结构的新型电液激振器[J]. 浙江大学学报，2014，48(5)：757-763.HAN Dong，GONG Guofang，LIU Yi，et al. New electro-hydraulic exciter based on different spools[J]. Journal of Zhejiang University，2014，48(5)：757-763.
[12] 韩冬，龚国芳，刘毅，等. 激振技术波形饱和度研究[J]. 农业机械学报，2014，45(2)：334-339.HAN Dong，GONG Guofang，LIU Yi，et al. Waveform saturation of electro-hydraulic excitation technology[J]. Transactions of the Chinese Society for Agricultural Machinery，2014，45(2)：334-339.
[13] HAN D，GONG G F，YANG H Y，et al. Waveforms analysis and optimization of new electro-hydraulic excitation technology[J]. Journal of Central South University，2014，21(8)：3098-3106.
[14] 龚国芳，刘毅，闵超庆，等. 用于液压激振器的阀芯旋转式四通换向阀：中国，201010100305.1[P]. 2010-01-09.GONG Guofang，LIU Yi，MIN Chaoqing，et al. A new spin valve for electrohydraulic exciter：China，201010100305.1[P]. 2010-01-09.
[15] 龚国芳，闵超庆，刘毅，等. 微行程双作用液压缸：中国，201110229855.8 [P]. 2011-08-11. GONG Guofang，MIN Chaoqing，LIU Yi，et al. Micro-displacement double functioned oscillation cylinder：China，201110229855.8 [P]. 2011-08-11.
[16] 龚国芳，刘毅，闵超庆，等. 一种捣固装置的液压激振系统：中国，201010520147.5 [P]. 2010-10-26. GONG Guofang，LIU Yi，MIN Chaoqing，et al. A new electro-hydraulic exciter：China，201010520147.5[P]. 2010-10-26.