The natural vibration characteristics of the dynamic ring in the extreme conditions and the high parameters will seriously affect the working performance and service life of the mechanical seal system. In this research

aimed at the study of the dynamic ring for the high parameter bellows mechanical seal system

the dynamic ring modal model was built up

and the first fifteen order natural vibration frequency

amplitude and vibration mode of the dynamic ring under the conditions of with and without heat-load was got by calculating

and its change trend was analyzed

the change rule of inherent vibration frequency for dynamic ring with the modal order number is obtained.