Abstract:To study the oil film force distribution and dynamic characteristics of a new type turntable,the mathematical model of the oil film force of the turntable was established under the premise of considering the flow balance,especially the flow generated by extrusion.The calculation formula of the vertical oil film stiffness and damping of the turntable was derived by the partial derivative method.Under the fixed load and constant oil supply pressure,the influence of the rotational speed on the static and dynamic characteristics of the turntable was analyzed.The analysis results show that under the fixed load and constant oil supply pressure,with the increase of the rotational speed,the oil film thickness of the turntable is gradually decreased,the bearing capacity of the dynamic pressure zone,the total leakage of the turntable and the stiffness and damping of the vertical oil film of the turntable are gradually increased.The model fully considers the extrusion flow generated by the axial velocity of the turntable,and the simulation calculation is more in line with the actual working conditions,which can provide theoretical support for the actual production and performance research of the new dynamic and static pressure turntable.