| 摘要 |
PURPOSE:To enable to miniaturize the compressor and at the same time reduce the vibration and noise thereof by a structure wherein leg parts fixed to the bottom part of the compression main body are supported by elastic vibration insulators and at the same time dynamic vibration absorbers comprising supporting a weight by means of an elastic support fixed onto the leg part are provided. CONSTITUTION:The compressor is rotated at a rotational frequency a little lower than the frequency of power source and large vibration is excited at said frequency. However, because the dynamic vibration absorbers 5, the primary natural resonance frequency of which is made coincide with the rotational frequency of the compressor or the frequency of power source, are installed at the leg parts 2, the dynamic vibration absorbers 5 vibrate with a phase opposite to the vibration of the compressor. Accordingly, the dynamic vibration absorbers 5 supply reaction torques to the compressor main body 1 at the installation positions of the leg parts 2 through the elastic supports 5b and the leg parts 2. As a result, the torque due to the vibration of the compressor and the torque supplied by the dynamic vibration absorber 5 deaden each other, resulting in effectively reducing the overall vibration of the compressor. |
