Abstract
This study aims at quantifying malfunctioning in the reciprocating compressor and establishing a new monitoring technique. We proposed a mathematical model (eleven degrees of freedom) in which deterioration and damage are expressed by changing model parameters. Our proposed method is simultaneously monitoring the damaged portion and the extent on the reciprocating compressor by estimating the stiffness change of the connecting portion and the sliding portion corresponding to the frequency characteristics change of the system in accordance with the long-term continuous operation. In this paper, we examined the vibration characteristics for reciprocating compressor using the analysis based on the rigid model and vibration test for a small experimental equipment. To investigate the relationship of the sliding portion characteristic change and the frequency characteristics during operation, we employ two kinds of the material, carbon and molybdenum steel as the ring bush of the ground support. As a result, it was confirmed by numerical analysis and experiment test the relationship between the sliding portion and frequency response during operation. In addition, it was possible to estimate the vibration characteristics by using the proposed model.
