Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 03, 2017 - September 06, 2017
The self-standing support method using the theory of the center of percussion is newly proposed in order to achieve the vibration reduction of a reciprocating compressor for refrigerators. In a typical compressor, the drive unit corresponding to the compressor body is flexibly supported inside the shell by four coil springs. Because the natural frequencies of the drive unit are relatively-low, the increase in vibration is inevitable while driving the compressor in a low rotation region. In contrast, in the proposed method, the drive unit of which the spherical element is attached on the bottom is placed directly on the shell. The self-standing state can be stably-maintained by the effect of the tangential component of the gravity. This restoring force is smaller than that of the coil springs, so the natural frequencies of the drive unit become lower compared with spring supports. In addition, the drive unit is optimally designed so that the contact point between the drive unit and the shell coincides with the center of rotation. It is possible to suppress the vibration transmission from the drive unit to the shell. In this study, the fundamental model whit an unbalance motor was developed in order to investigate the effective of the proposed method. The results of the numerical analyses and experiments confirm that the present method is very effective to suppress the vibration of the compressor.
