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Experimental and Calculation Studies into the Possibilities of Improving the Vibration Isolation of Power Installation Pipelines
Thermal Engineering Pub Date : 2020-06-30 , DOI: 10.1134/s0040601520070046
A. V. Kirjukhin , O. O. Milman , A. V. Ptakhin , I. S. Serbin , L. N. Serezhkin

Abstract—

The article presents the results from studying methods and means for reducing the transfer of vibration and pressure pulsations from power installations through elastic vibration isolators of pipelines carrying liquids (cooling water, condensate, or petroleum products) by suppressing the vibration forces and pulsations of the medium by active suppression systems. The results of studies into this subject carried out within the framework of the agreement between the Russian Scientific Foundation and the Tsiolkovskii Kaluga State University are reported. The article discusses the results from calculation and experimental studies aimed at determining the influence of liquid on the vibration-isolating performance of different kinds of pipeline compensators, including those based on bellows, sleeve-type ones made of rubber cord materials, those based on rubber cord shells, and compensators of a new type containing elastic inserts made using thin-layered rubber-metal elements with the minimal interaction between the structure and working medium. The investigations were carried out with the aim to minimize the transfer of vibration through the compensator by improving its design. The results from experimental studies into the effectiveness of joint suppression of the vibration and pressure pulsations by active methods for reducing the transfer of vibration from power installations to the foundation by means of pipeline compensators are presented. It is shown both analytically and experimentally that there is a frequency band in which the vibration forces transferred through the compensator structure are suppressed by the forces from pressure pulsations. The transfer of vibration becomes a factor of ten or more less than it is in the compensator tested without liquid. A physical explanation for this phenomenon is given, and ways of using it in practice are suggested. A two-channel active vibration protection system with a digital control device containing controllers in the form of standard Butterworth, Chebyshev, and band-pass filters, as well as resonance sections in its feedback circuit, is experimentally studied. With the active joint wide-band suppression of vibration forces and pressure pulsations determining the transfer of vibration through the compensators of pipelines with liquid, the effectiveness was found to be up to 32 dB in the frequency band from 10 to 350 Hz.


中文翻译:

改善电力安装管道隔振能力的实验和计算研究

摘要-

本文介绍了研究方法和手段的结果,这些方法和手段通过抑制介质的振动力和脉动来减少输送液体(冷却水,冷凝水或石油产品)的管道通过弹性隔振器从动力装置传递的振动和压力脉动。通过主动抑制系统。据报道,在俄罗斯科学基金会和卡洛加州立大学齐奥科夫斯基分校之间的协议框架内进行的研究结果。本文讨论了通过计算和实验研究得出的结果,旨在确定液体对各种管道补偿器的振动隔离性能的影响,包括基于波纹管的,由橡胶帘线材料制成的套筒型,那些基于橡胶帘线壳和新型补偿器的补偿器,其中包含由薄层橡胶-金属元件制成的弹性嵌件,使结构和工作介质之间的相互作用最小。进行研究的目的是通过改进补偿器的设计来使通过补偿器的振动传递最小化。通过实验研究得出的结果表明,采用主动方法可以有效地联合抑制振动和压力脉动,从而通过管道补偿器减少振动从动力装置到地基的传递。解析地和实验地示出,存在一个频带,其中通过补偿器结构传递的振动力被来自压力脉动的力抑制。振动的传递比在没有液体的情况下进行补偿的补偿器小十倍或更多。给出了对该现象的物理解释,并提出了在实践中使用该现象的方法。对带有数字控制设备的两通道主动振动保护系统进行了实验研究,该系统包含标准Butterworth,Chebyshev和带通滤波器形式的控制器以及其反馈电路中的谐振部分。通过对振动力和压力脉动进行主动联合宽带抑制,确定通过液体的管道补偿器进行的振动传递,在10至350 Hz的频带中,其有效性高达32 dB。给出了对该现象的物理解释,并提出了在实践中使用该现象的方法。实验研究了一个带有数字控制设备的两通道主动振动保护系统,该系统包含标准Butterworth,Chebyshev和带通滤波器形式的控制器以及其反馈电路中的谐振部分。通过对振动力和压力脉动进行主动联合宽带抑制,确定通过液体的管道补偿器进行的振动传递,在10至350 Hz的频带中,其有效性高达32 dB。给出了对该现象的物理解释,并提出了在实践中使用该现象的方法。实验研究了一个带有数字控制设备的两通道主动振动保护系统,该系统包含标准Butterworth,Chebyshev和带通滤波器形式的控制器以及其反馈电路中的谐振部分。通过对振动力和压力脉动进行主动联合宽带抑制,确定通过液体的管道补偿器进行的振动传递,在10至350 Hz的频带中,其有效性高达32 dB。以及反馈电路中的谐振部分,都经过实验研究。通过对振动力和压力脉动进行主动联合宽带抑制,确定通过液体的管道补偿器进行的振动传递,在10至350 Hz的频带中,其有效性高达32 dB。以及反馈电路中的谐振部分,都经过实验研究。通过对振动力和压力脉动进行主动联合宽带抑制,确定通过液体的管道补偿器进行的振动传递,在10至350 Hz的频带中,其有效性高达32 dB。
更新日期:2020-06-30
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