Filtering Characteristics of Hydraulic Suppressor with Compressible Liner
-
摘要: 为了改善传统扩张室压力脉动衰减器脉动衰减性能，提出了一种敷设聚氨酯衬里的改进型脉动衰减器. 根据衰减器分布参数与集中参数特性，研究该改进型结构滤波特性. 首先通过一维解析法构建传统扩张室分布参数模型，获得的理论插入损失与实验测量结果吻合良好，证明了该方法用于脉动衰减器建模的可行性；之后利用该一维解析法构建改进型脉动衰减器直通穿孔管段分布参数模型，敷设聚氨酯衬里的阻性部分则构建集中参数模型，最后研究了衬里材料成分、穿孔率以及穿孔直径对衰减器滤波特性的影响. 研究结果表明：在500 Hz频带范围内，液体静压力稳定在2.76、4.14、4.83 MPa时，老化聚氨酯衬里能显著改善脉动衰减器的插入损失；无论聚氨酯材料老化处理与否，不同液体静压力均对插入损失产生影响；穿孔率和穿孔直径对其插入损失影响较小.Abstract: An improved expansion chamber hydraulic noise suppressor with a compressible polyurethane liner was introduced to improve the pulsation attenuation performance of conventional suppressors. The filtering characteristics of this improved configuration were studied based on the characteristics of distributed and lumped parameters. First, a distributed parameter model of a conventional expansion chamber was developed using a one-dimensional (1D) analytical approach. Theoretical insertion loss (IL) is in good agreement with the experimental results. This illustrates that the method is also applicable to hydraulic suppressors. Then, a distributed parameter model of the perforated tubes in this improved structure was developed by utilizing the 1D method. A lumped parameter model works well for modelling the behaviour of the compliant lining part. Finally, the effects of voiding, porosity, and hole diameters on the performance of the improved expansion chamber hydraulic suppressor were studied. The results show that within frequencies of 500 Hz, voided urethane lining can remarkably improve IL at 2.76, 4.14 MPa, and 4.83 MPa. IL is affected by different hydrostatic pressures, regardless of whether the liner is voided or not. The effect of porosity and hole diameters on IL is marginal.
-
图 3 简单扩张室理论插入损失与实验测量对比
Figure 3. Comparison of theoretical insertion loss and experimental measurements for the simple expansion chamber
图 6 集中与分布参数模型结果对比
Figure 6. Comparison of lumped parameter and distributed parameter models
图 7 不同压力下改进型结构插入损失随频率的变化
Figure 7. Change of insertion loss with freguencies for improved structureat at different pressures
图 8 穿孔直径对改进型结构插入损失的影响（4.14 MPa）
Figure 8. Effect of the hole diameter on insertion loss of the improved structure at 4.14 MPa
-
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 doi: 10.1080/14399776.2000.10781089 MAREK K A, EARNHART N E, CUNEFARE K A. 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 doi: 10.1016/j.jsv.2014.07.006 欧阳小平,李磊,方旭,等. 共振型液压脉动衰减器研究现状及展望[J]. 机械工程学报,2015,51(22): 168-175OUYANG Xiaoping, LI Lei, FANG Xu, et al. Research status and prospects of resonant-type hydraulic pulsation attenuators[J]. Journal of Mechanical Engineering, 2015, 51(22): 168-175 MUNJAL M L. Acoustics of ducts and mufflers[M]. Second Edition. New York: John Wiley & Sons Ltd., 2014: 2-12 焦宗夏,陈平,华清,等. 液压能源管路系统振动主动控制的理论研究[J]. 北京航空航天大学学报,2002,28(4): 465-469 doi: 10.3969/j.issn.1001-5965.2002.04.026JIAO Zongxia, CHEN Ping, HUA Qing, et al. Theoretical study on vibration active control of power supply and pipeline systems[J]. Journal of Beijing University of Aeronautics and Astronautics, 2002, 28(4): 465-469 doi: 10.3969/j.issn.1001-5965.2002.04.026 KELA L. Resonant frequency of an adjustable Helmholtz resonator in a hydraulic system[J]. Archive of Applied Mechanics, 2009, 79(12): 1115-1125 doi: 10.1007/s00419-008-0279-5 DEBEDOUT J M, BERNHARD R J, MONGEAU L, et al. Adaptive-passive noise control with self-tuning Helmholtz resonators[J]. Journal of Sound and Vibration, 1997, 202(1): 109-123 doi: 10.1006/jsvi.1996.0796 王岩,郝凤乾,郭生荣,等. 扩张室压力脉动衰减器的研究现状及发展趋势[J]. 机床与液压,2015(15): 180-186 doi: 10.3969/j.issn.1001-3881.2015.15.046WANG Yan, HAO Fengqian, GUO Shengrong, et al. Research status and development trend of the expansion chamber pressure pulsation attenuator[J]. Machine Tool & Hydraulics, 2015(15): 180-186 doi: 10.3969/j.issn.1001-3881.2015.15.046 季振林. 消声器声学理论与设计[M]. 北京: 科学出版社, 2015: 14-90 EARNHART N E, CUNEFARE K A. Compact Helmholtz resonators for hydraulic systems[J]. International Journal of Fluid Power, 2012, 13(1): 1-50 何平笙. 高聚物的力学性能[M]. 2版. 合肥: 中国科学技术大学出版社, 2008: 32-75 罗志昌. 流体网络理论[M]. 北京: 机械工业出版社1988: 59-207 SULLIVAN J W. A method for modeling perforated tube muffler components Ⅰ theory[J]. Journal of the Acoustical Society of America, 1979, 66(3): 772-778 doi: 10.1121/1.383679 PEAT K S. A numerical decopling analysis of perforated silencer elements[J]. Journal of Sound and Vibration, 1988, 123(2): 199-212 doi: 10.1016/S0022-460X(88)80106-8 SULLIVAN J W. A method for modeling perforated tube muffler components.Ⅱ applications[J]. Journal of the Acoustical Society of America, 1979, 66(3): 779-788 doi: 10.1121/1.383680 KARLSSON M, GLAV R, ABOM M. The Herschel-Quincke tube:the attenuation conditions and their sensitivity to mean flow[J]. Journal of the Acoustical Society of America, 2008, 124(2): 723-732 doi: 10.1121/1.2940580 DESANTES J M, TORREGROSA A J, CLIMENT H, et al. Acoustic performance of a Herschel-Quincke tube modified with an interconnecting pipe[J]. Journal of Sound and Vibration, 2005, 284(1/2): 283-298 -
下载:
点击查看大图
图(9)
计量
- 文章访问数: 440
- HTML全文浏览量: 182
- PDF下载量: 5
- 被引次数: 0