NDLI: Modification design of large-scale compressor crankshaft based on modal and dynamic response analysis

Content Provider	IEEE Xplore Digital Library
Author	Shijie Wang Zengjin Xu Yuan Li
Copyright Year	2012
Description	Author affiliation: School of Mechanical Engineering, Shenyang University of Technology, China (Shijie Wang; Zengjin Xu; Yuan Li)
Abstract	Crack of crankshaft and scuff of bearing have been the bottleneck for the development of large-scale reciprocating compressor. To solve such problems, modal and dynamic response analyses are performed for the crankshaft system. Torsional model shapes and stress status are obtained, which shows that the crack of original crankshaft results from fatigue damage and slight torsional vibration, and two factors result in frequent scuff of the crank bearings. After the diameter is enlarged, the torsional vibration amplitude of crank pin becomes larger, which increases continuously from driving end to free end. At the same time the first order of natural frequency of torsional vibration is increased, and the ratio r between sevenfold rotating speed and the first order of natural frequency is reduced from 1.036 to 1.016, and therefore a stronger resonance vibration occurs. The crankshaft is cut off between $2^{nd}$ and $3^{rd}$ phase at last and re-connected with two hot assembled plate flanges, rotational inertia-mass is thus enlarged and the ratio r is increased to 1.064. As such the resonance vibration disappears and fatigue life of crankshaft is prolonged effectively.
Starting Page	843
Ending Page	847
File Size	1549383
Page Count	5
File Format	PDF
ISBN	9781467307864
e-ISBN	9781467307888
DOI	10.1109/ICQR2MSE.2012.6246359
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-15
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Vibrations Shafts Dynamic response Reciprocating compressor Shape Resonant frequency Crankshaft Fatigue History Modal Stress Modification design
Content Type	Text
Resource Type	Article

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