The purpose of this study is to investigate the transient performance of oil films in large-scale hydrostatic turntables under constant linear velocity cutting conditions.
The authors derived the equation for the table speed under the constraint of constant linear velocity operation and established the transient bearing capacity equation and the temperature rise equation of the oil film. Through theoretical analysis, numerical simulation and experimental verification, the authors studied the transient characteristics of the oil film during constant linear speed operation of a large-scale hydrostatic turntable.
It is found that the higher the initial rotational speed of the table, the larger the shear stress between the sealing oil wall and the lubricating oil, and at high speeds, the shear flow dominates. The transient flow term increases caused by the angular acceleration, and the pressure loss is mainly caused by fluctuations in flow rate and shear stress. The pressure curves all regain stability within 10 ms.
In this study, the effects of initial speed and angular acceleration on the oil film performance parameters such as oil film temperature, oil cavity pressure and wall shear stress are explored, and the variation law of oil film performance during the transient operation of constant linear speed of the turntable is revealed.
The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-03-2025-0120/
