Preview

PDF 146797 - Resear...pdf | Download (2MB) | Preview

Abstract

Excessive vibration of complex structures in a multi-excitation environment is an arduous problem. Especially in a reciprocating compressor, how to quickly and accurately position the vibration sources, analyze the excitation features and take effective solutions is of great significance to the safe and stable operation of the compressor. In this paper, the problem of excessive vibration of an air-cooled heat exchanger used in a variable speed CH4 compressor was studied. The air-cooled heat exchanger is composed of tubes, tube boxes and support frame. Its vibration is evoked by complex periodic gas pulsation in the tubes. The vibration model of the heat exchanger was simplifies as a multi-freedom model with periodic excitations using the lumped parameter method. The model has advantages of clear physical concept, easy solution and high accuracy of result. In the model, the air-cooled heat exchanger was simplified as three mass blocks connected by six springs. And then, modal test of the heat exchanger was carried out on site. The vibration modes and natural frequencies of the exchanger were obtained according to the test results. After that, above mentioned multi-freedom model was further simplified as a single freedom vibration model, so that it was convenient to propose the vibration control measures. The practical application results proved that these measures were effective. This research provided a practical and fast analytical method for solutions of compressor vibration problems.

Item Type:	Conference Publication
Authors/Creators:	Ye, J and Yu, X and Fan, S and Lv, Q and Wang, X
Keywords:	air-cooled heat exchanger, complex structural vibration, modal test, lumped parameter method
Journal or Publication Title:	IOP Conference Series: Materials Science and Engineering
Publisher:	Institute of Physics Publishing Ltd.
ISSN:	1757-8981
DOI / ID Number:	10.1088/1757-899X/1180/1/012035
Copyright Information:	Content from this work may be used under the terms of theCreative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Related URLs:	Google Scholar: Wang, X UTAS Profile: Wang, X
Item Statistics:	View statistics for this item

Actions (login required)

Item Control Page