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http://dx.doi.org/10.5293/KFMA.2010.13.3.043

Analysis of Rotordynamic Design Characteristics and Vibration Reduction of an Air Turbo Compressor for Oxygen Plant  

Kim, Byung-Ok (한국기계연구원 시스템다이나믹스연구실)
Lee, An-Sung (한국기계연구원 시스템다이나믹스연구실)
Publication Information
The KSFM Journal of Fluid Machinery / v.13, no.3, 2010 , pp. 43-48 More about this Journal
Abstract
In this study rotordynamic characteristics of an air turbo-compressor (ATC) used in oxygen plant are analyzed and its operating-speed balancing is performed to solve the vibration trouble caused by rotor unbalance. Three dimensional model of the ATC rotor is completed and then analytical FE (finite element) model, which is verified by experimental modal testing, is developed. A rotordynamic analysis includes the critical map, Campbell diagram, and unbalance response, especially considering the pedestal housings supporting tilting pad bearings. A test run of operating-speed, using tilting-pad bearing of actual use, showed that the vibration level increased very sharply as approaching the rated speed. The operating-speed balancing specified by API 684 was carried out by using influence coefficient method. The results showed that the vibrations at the bearing pedestal housings represented good levels of 0.1 mm/s. From the test run and operating-speed balancing, the analytical results, that is, critical speeds are in good agreement with the test results and unbalance responses introducing the correction masses are similar to the as-is test responses in its aspect.
Keywords
Rotordynamics; Turbo-Compressor; Critical speed; Operating-speed balancing; Modal test;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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2 API STANDARD 684, 2005, “Rotordynamics Tutorials: Lateral Critical Speeds, Unbalance Response, Stability, Train Torsional, and Rotor Balancing”
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4 API STANDARD 617, 2002, “Axial and Centrifugal Compressors and Expander-compress-ors for Petroleum, Chemical and Gas Industry Services”.
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