...Guangyi Yin; Changzheng Chen; Wang Zhengqi Purpose Traditional time-varying meshing stiffness models for polymer gears ignore viscoelasticity, leading to inaccurate material response under alternating stress and limited dynamic prediction accuracy. This paper aims to propose a viscoelasticity...

... such leakage. Design/methodology/approach Based on the principle of cam motion and considering viscoelasticity, develops a motion model of the compression and release of the shaft seal and proposes a method to determine its failure. In addition, this study quantifies the leakage gap and formulates...

...-liner friction-vibration experimental platform and dynamic viscoelastic test of liner. Findings The results show that: With increasing excitation frequency, the friction between the three liner materials (G30, K25, PU) and the wire rope decreased, and the wear of the surface shape of the liners...

... by considering the material viscoelasticity, and a cam-plate mechanism is established as an equivalent model for the motion between the shaft and the lip; according to this, the equation of lip motion trajectory is derived. Findings The trajectory of the lip lags that of the shaft in the eccentric state...

.../methodology/approach The study is conducted numerically using a squeeze film model that incorporates the effects of viscoelasticity, permeability and surface roughness. Findings It is seen that with increasing permeability of the porous rubber block, both the hydrodynamic force and the leakage flow rate...