关键词: 机械密封, 瞬态振动, 非线性振动, 响应

Abstract:

Considering the tilt of a seal ring,the transient vibration response analysis model of a non-contact mechanical seal was presented.The model was consisted of  transient Reynolds equation,motion equation and equation for solving the second-order nonlinear dynamic coefficients of the seal.With Euler method,the characteristic parameters of the transient vibration response were obtained,which included the axial vibration displacements and the angle-swing of the static ring.14 nonlinear forces and 14 nonlinear overturning moment dynamic coefficients for the non-contact mechanical seal were calculated.The results show that the influences of the damping effects of the sealed fluid between the seal gaps on the axial vibration displacements and the angle-swing are linear.The film thickness distribution changes
with the axial vibration of seal,which will lead to static ring swing,and the swing can also cause the axial vibration of the seal.

Key words: mechanical seal, transient vibration, non-linear vibration, response