The stability analysis and vibratory response on angular wobbly in the system of dry gas seal
ZHANG Wei-zheng1;YU Shu-rong1; DING Xue-xing1,2;Han ming-jun3; DU Zhao-nian2
1. College of Petrochemical Engineering, Lanzhou Univ. of Tech., Lanzhou gansu 730050, China; 2. Wenzhou Research Institute of Pump and Valve Engineering of Lanzhou Univ. of Tech.,Wenzhou zhejiang 325105,China; 3. School of Science, Lanzhou Univ. of Tech., Lanzhou gansu 730050, China
Abstract：The angular wobbly of dry gas seal system has changed the micro-scale gap of moving and static rings and influenced the sealing performance, The dynamic model of the angular wobbly of the gas film and seal ring was established, and the gas film angular rigidity, critical moment of inertia and the two-dimensional angular wobbly vibration equation were solved by using the perturbation method and the Runge-Kutta method, then the seal structure stability parameters were obtained , and the vibratory response of best stability point and critical point were analyzed. The research results show that there are stability point-fields α=74°30′06″-75°16′10″ in the neighborhood of spiral angle α=75°,and the optimal value of the spiral angle α is 74°53′48″ in this example. The vibratory response of best stability point is quasi-periodic motion，but response of critical point is chaotic motion.
张伟政;俞树荣;丁雪兴;韩明君;杜兆年. 干气密封系统角向摆动的稳定性及其振动响应[J]. , 2011, 30(3): 96-99.
ZHANG Wei-zheng;YU Shu-rong;DING Xue-xing;Han ming-jun;DU Zhao-nian. The stability analysis and vibratory response on angular wobbly in the system of dry gas seal. , 2011, 30(3): 96-99.
2011, Vol. 30 
