In this paper, the lubrication state of the meshing pair in a single-screw compressor is analysed. The two-phase lubrication flow field numerical calculation model and the multi-tooth coupling circumferential torque calculation model are established. The oil film pressure and the circumferential torque of multi-tooth at 0%–60% air volume fraction (AVF) inlet are studied. Results show that the AVF at the inlet plays an important role in the promotion of the peak and average pressures of the oil flow field for certain star-wheel rotation angles. For other star-wheel rotation angles, the aforementioned pressure may even be weakened. For multi-tooth coupling, the star-wheel circumferential torque with inlet AVF of 20%, 40% and 60% is 15.3%, 13.1% and 6.8% higher than that with inlet pure oil, respectively. This shows that the existence of bubbles at the inlet increases the unbalanced circumferential torque of the star-wheel and increases the possibility of wear of the teeth.

中文翻译：

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单螺杆压缩机啮合副两相润滑特性研究

本文对单螺杆压缩机啮合副的润滑状态进行了分析。建立了两相润滑流场数值计算模型和多齿联轴器圆周扭矩计算模型。研究了多齿在0%~60%空气体积分数（AVF）入口处的油膜压力和周向扭矩。结果表明，在一定的星轮转角下，入口处的 AVF 对提高油流场的峰值压力和平均压力具有重要作用。对于其他星轮旋转角度，上述压力甚至可以减弱。对于多齿联轴器，进口AVF为20%、40%和60%的星轮圆周扭矩分别比进口纯油高15.3%、13.1%和6.8%。