Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : December 02, 2021 - December 03, 2021
In petrochemical plants, equipment for efficiently compressing low-molecular-weight gases is widely used. Among them, the reciprocating compressor has a long piston rod, which enables efficient compression at both ends of the piston. Since the inside of the compressor is covered by a casing, it is not possible to grasp the inside condition of the actual machine. In this study, the acceleration of the crosshead, piston rod, and piston were collected by using a small experimental machine that was manufactured based on the vibration characteristics of the actual machine so that the internal conditions could be grasped. The simulation results using a 12-degree-of-freedom dynamic model of the small experimental machine were used to identify parameters of the narrow-band time series data using the frequency considered to be the piston rod bending vibration during operation, in order to reproduce the shock fluctuation of one crankshaft revolution obtained from the experiment. The acceleration of the simulation results using the parameters obtained from the results was able to reproduce the characteristic shock fluctuations at two locations of the crankshaft single rotation.
