共查询到19条相似文献,搜索用时 187 毫秒
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4RDS往复压缩机组管系振动分析及减振措施 总被引:1,自引:0,他引:1
对3台4RDS往复压缩机组出口管系存在的振动进行了分析。通过对4RDS型压缩机组进行现场振动监测和数据采集,分析了振动原因,制定出减振处理方案并采取了有效的减振措施。减振改造后3台压缩机组出口管系的振动幅值达到了合格标准,并对尚存在的问题提出了建议。 相似文献
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往复压缩机管道系统的振动是现代工业中的常见问题,为了避免装置停车和对现有管路造成破坏,从刚度控制角度进行了减振研究。首先,从振动理论上阐明了系统刚度对管道振动的影响及刚度控制是管道减振的关键所在;其次,从数值模拟的刚度处理和实际减振的刚度控制两个方面阐述了通过调节系统刚度来控制管道振动的减振技术,介绍了一种单向刚度可控和一种双向刚度可控的管道减振装置;最后,以某石化企业的往复压缩机管系减振为例,介绍了该技术在工业现场的实际应用。结果表明:通过实测数据和软件优化相结合计算得到的结合部刚度能较好还原真实的振动现场,设计的刚度调节减振装置能有效降低往复压缩机管系振动,保障设备安全运行。 相似文献
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往复压缩机噪声诊断及降噪研究 总被引:3,自引:0,他引:3
对全封闭往复压缩机进行了声功率、声压级、壳体振动和壳体模态试验,分析了压缩机主要振动和噪声源.确定了壳体的振动模态,指出了进一步降低压缩机噪声的途径。确定2500Hz和3150Hz的峰值噪声主要是壳体的辐射噪声,并且采取了两种降噪措施,经试验比较,降噪效果明显。 相似文献
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基于梯度阈值的往复压缩机振动信号小波包奇异值降噪 总被引:1,自引:0,他引:1
信号降噪是往复压缩机故障诊断的关键环节。文中首先对比分析小波包和奇异值降噪,认为对于光滑信号,奇异值降噪十分有效,对富含突变的信号,小波包降噪效果好。然后针对振动信号的不同特性,提出梯度值和梯度阈值的概念,若信号的梯度值小于梯度阈值,则采用奇异值降噪,否则用小波包降噪。并通过大量数据分析确定往复压缩机振动信号的梯度阈值。最后以曲轴轴承和阀的振动信号降噪为例,计算二者的梯度值,确定前者应用奇异值降噪,后者应用小波包降噪。结果表明,基于梯度阈值的降噪取得了令人满意的效果。 相似文献
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论述了往复压缩机变转速调节对轴系扭转振动及管道系统气流脉动的影响,提出了分析及问题解决的基本方法,为压缩机减振设计提供依据。 相似文献
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研究了离心压缩机机壳在内部基频气动力激励下的振动辐射噪声。考虑机壳与轮盘、轮盖之间的间隙,采用SSTk-co湍流模型模拟了离心压缩机的整机三维非定常流场,得到蜗壳内表面的脉动压力,然后将脉动压力的基频部分加载到蜗壳上,模拟离心压缩机蜗壳在非定常气动力激励下的振动噪声。研究表明:机壳内壁面基频压力脉动主要分布在无叶扩压器靠近叶轮出口一侧;机壳主要基频振动噪声源位于蜗壳靠近出口管道一侧;该离心压缩机机壳基频振动位移幅值很小,最大振动位移仅为11.8×10^-9m,因此可以忽略机壳的基频振动对离心压缩机运行安全性的影响。 相似文献
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Coherence technique for noise reduction in rotary compressor 总被引:1,自引:0,他引:1
H. C. Kim M. G. Cho J. Kim J. H. Park J. Shim 《Journal of Mechanical Science and Technology》2012,26(7):2073-2076
The noise and vibration of a rotary compressor, a type of multi-input, single output system, are generally studied through frequency analysis. Although this method is effective in analyzing frequency components, using this method to identify the specific source of the noise (4 kHz to 6 kHz) is difficult. Hence, noise source should be studied systematically. In this study, a coherence analysis method based on systems analysis is used to identify the compressor noise source. Compressor noise source is identified through the coherence between the vibration signals on the shell of the compressor and the noise signal at one point near the compressor (1 m away from the compressor). A one-third octave band is employed for frequency analysis. The design of experiment is conducted to identify possible noise factors, such as volume, size, and neck area of the resonator in the compressor cylinder. Analysis showed that noise was generated from the cavity of the cylinder and the muffler inside the rotary compressor. A new type of muffler was applied to the rotary compressor to verify this finding. Noise was dramatically reduced. 相似文献
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由曲柄连杆机构驱动的普通活塞式空压机存在噪声、振动和缸体磨损等问题,提出双曲柄连杆机构驱动的活塞式空压机来解决这些问题;同时设计了基于对称双曲柄活塞驱动的二次增压双作用空压机和双级双作用空压机,提高了空压机的输出压力和流量,并可实现低压大流量和高压小流量的输出控制;降低空压机的振动和噪声,提高平稳性,降低活塞和气缸缸体的磨损,提高空压机的使用寿命。 相似文献
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The hermetic rotary compressor is one of the most important components of an air conditioning system since it has a great
effect on both the performance and the noise and vibration of the system. Noise and vibration occurs due to gas pulsation
during the compression process and to unbalanced dynamic force. In order to reduce noise and vibration, it is necessary to
identify their sources and transmission path and effectively control them. Many approaches have been tried in order to identify
the noise transmission path of a compressor. However, identification has proven to be difficult since the characteristics
of compressor noise are complicated due to the interaction of the compressor parts and gas pulsation. In this study, the statistical
energy analysis has been used to trace the energy flow in the compressor and to identify the transmission paths from the noise
source to the exterior sound field. 相似文献
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利用Visual Basic 6.0和MATLAB混合编程技术开发了往复压缩机轴系扭振计算程序.该程序能够进行曲轴扭振的模态计算和动态响应计算,同时,还可以进行压缩机动力计算.其中,对自由振动采用了传递矩阵法;对强迫振动,则在考虑转速波动对激振力影响的基础上,采用了瞬态动力学的计算方法.通过对相关实例进行分析和结果对比,验证了该程序的可行性及工程实用价值. 相似文献
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某国产轿车存在空调开启时车内噪声较大及怠速时车内出现间歇性异常噪声问题,为寻找振源,对样车及其压缩机系统进行了试验诊断与分析,包括样车摸底试验、压缩机安装状态的刚体模态试验、压缩机在消声室中的台架试验等,最终确定压缩机噪声较大原因为空调管路制冷剂冲击导致的管路振动噪声向车内的直接传递,间歇性异常噪声原因为压缩机工作频率与发动机8阶工作频率的拍频。根据诊断结果,提出了相应的改进措施,并进行了改进后样车的试验验证,结果表明改进效果比较明显。 相似文献