本文设计了一种使用聚氨酯柔性衬里的扩张室脉动衰减器，利用集中参数法建立其等效电路模型，并在一定频率范围内，与分布参数模型做对比，证明了模型的可行性。从集中参数的角度分析了聚氨酯衬里材料强可压缩性使其表现出巨大的容性，对使用老化、未老化聚氨酯衬里以及普通扩张室脉动衰减器的对比结果表明，可以通过改变柔性衬里的材料成分而不必改变衰减器的外形尺寸来拓展其频宽。在其他条件不变的情况下，使用老化聚氨酯柔性衬里的扩张室脉动衰减器相比未使用的情况空间尺寸可以得到大幅缩减。对于使用老化聚氨酯衬里的扩张室压力脉动衰减器而言，随着系统压力的升高，衰减器有效衰减频带范围随之减小，衰减特性受系统压力影响较大。
Abstract
A compliant urethane lining was used in an expansion chamber hydraulic suppressor to reduce the propagation velocity of pulse wave, which made compact pulsation attenuation possible.An expansion chamber hydraulic muffler with a compressible urethane liner was put forward in this paper.Besides, a lumped parameter method was used to build the equivalent circuit model and its feasibility was proved within a certain frequency range.Manifestations of large capacitance were caused by strong compressibility of urethane lining from the point of view of lumped parameter and the results of ageing lining.Unaged ling and ordinary expansion chamber hydraulic attenuators show that bandwidth can be expanded by changing liners’ material composition and there is no needed to change outline dimension of suppressors.Given the situations that other conditions remain unchanged, sapce size can be significantly reduced by using ageing lining, in comparison with ordinary expansion chamber hydrulic mufflers.For an expansion chamber hydraulic suppressor with an ageing liner, with the increase of system pressure, mufflers’ effective attenuation band decreases and attenuation characteristics are affected by system pressure.
Key words
Hydraulic suppressor /
Expansion chamber /
Polyurethane /
lumped parameter model
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参考文献
[1] KOJIMA E, ICHIYANAGI T. Research on pulsation attenuation characteristics of silencers in practical fluid power systems[J]. International Journal of Fluid Power, 2000, 1(2): 29-38.
[2] 欧阳小平，李磊，方旭，杨华勇. 共振型液压脉动衰减器研究现状及展望[J]. 机械工程学报，2015(22)：168-175.
OUYANG Xiaoping, LI Lei, FANG Xu, YANG Huayong. Research status and prospects of resonant-type hydraulic pulsation attenuators[J]. Journal of mechanical engineering, 2015(22): 168-175.
[3] K.A. Marek, N.E. Earnhart, K.A. Cunefare. Model and analysis of a cylindrical in-line hydraulic suppressor with a solid compressible liner[J]. Journal of Sound and Vibration, 2014, 333(24): 6312-6331.
[4] M.L. Munjal, P.T. Thawani. Acoustic performance of hoses-a parametric study[J]. Noise Control Engineering Journal, 1996, 44(6): 274-280.
[5] J.Yu, E. Kojima. Wave propagation in fluids contained in finite-length anisotropic viscoelastic pipes[J]. 1998, 104(6): 3227-3235.
[6] D.N. Johnston, T.M. Way, K.M. Cone. Measurement of wave propagation characteristics of flexible hoses[C]//2007 ASME International Mechanical Engineering Congress and Exposition, 2007, 159-167.
[7] W. Byrd Jr., W. Annis. Hydraulic surge damper: USA, 2495693[P]. 1950.
[8] J.H. Wheeler, J.P. Frentzos. Fluid noise muffler and method of manufacture: USA, 5426270[P]. 1995.
[9] J.E. Kachnik. Supercharge hose: USA, 3665967[P]. 1972.
[10] R.H. Beach. Pipe line noise eliminator: USA, 2261948[P]. 1941.
[11] E. Arendt. Pulsation absorbing device: USA, 4759387[P]. 1988.
[12] E. Dexter. Pulsation dampener and acoustic attenuator: USA, 4497388[P]. 1985.
[13] J.C. Shiery. Noise suppressor: USA, 5732741[P]. 1998.
[14] Nicholas E. Earnhart, Kenneth A. Cunefare. Compact Helmholtz resonators for hydraulic systems[J]. International Journal of Fluid Power, 2012, 13(1): 1-50.
[15] S. Ramamoorthy, K. Grosh, J.M. Dodson. A theoretical study of structual acoustic silencers for hydraulic systems[J]. Journal of the Acoustical Society of America, 2002, 5(111): 2097-2108.
[16] 季振林. 消声器声学理论与设计[M].北京：科学出版社，2015.
JI Zhenlin. Acoustics theory and design of mufflers[M]. Beijing: Science Press, 2015.
[17] 何平笙. 高聚物的力学性能(第2版)[M]. 合肥：中国科学技术大学出版社，2008.
HE Pingsheng. Mechanical properties of polymers(Second edition)[M]. Hefei: Press of University of Science and Technology of China, 2008.
[18] 罗志昌. 流体网络理论[M]. 北京：机械工业出版社，1988.
LUO Zhichang. Fluid network theory[M]. Beijing: China Machine Press, 1988.
[19] M.L. Munjal. Acoustics of ducts and mufflers(S-econd edition)[M]. United Kingdom: John Wil-ey & Sons Ltd, 2014.
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