Abstract: In order to overcome the limitation of passive oil and gas separator and improve the separation efficiency of small diameter oil droplets below 1 μm, an active oil and gas separator based on motor control is designed, the oil and gas separator integrates the permanent magnet synchronous motor electronic control technology, and realizes the functions of start-stop control, self-diagnosis, overvoltage and overload protection of the oil and gas separator. The active oil-gas separator is driven by a motor to rotate the separation impeller at high speed, and realizes the purpose of gas-liquid two-phase separation with the help of centrifugal force and separation cotton. The experimental results show that the separation performance of the active oil-gas separator is more excellent than that of the passive oil-gas separator. The speed of the oil and gas separator is 12 000 r/min and the intake gas is 100 L/min, the separation efficiency of the active oil and gasseparator reaches 99.1%, and the oil carrying capacity is reduced to 0.149 8 g/h. At the same time, the test points out that the separation effect of passive oil and gas separator on small diameter oil droplets is obviously insufficient, and the separation efficiency of active oil droplets from 0.5 μm to 0.6 μm reaches 85.7%, which is significantly ahead of the passive oil and gas separator in the separation performance of small diameter oil droplets.

Key words: Oil-gas separator; Separation efficiency; Oil carrying capacity; Permanent magnet synchronous motor

摘要： 为突破被动式油气分离器的局限性，提高 1 μm 以下的小直径油滴分离效率，文章设计 了一种基于电机控制的主动式油气分离器，该油气分离器集成了永磁同步电机电控技术，实 现了油气分离器的启停控制、自我诊断、过压过载保护等功能。该主动式油气分离器通过电 机驱动分离叶轮高速旋转，并在离心力作用和分离棉辅助下，实现气液两相分离的目的。试 验研究表明，主动式油气分离器比被动式油气分离器的分离性能更加优秀；在油气分离器的 转速为 12 000 r/min 和进气量为 100 L/min 的工况下，主动式油气分离器的最高分离效率达到 了 99.1%，机油携带量仅有 0.149 8 g/h；同时通过试验指出了被动式油气分离器对小直径油滴 的分离效果存在明显不足，并验证了主动式油气分离器对直径为 0.5 μm 至 0.6 μm 的油滴的分 离效率达到了 85.7%，其在对小直径油滴的分离性能上大幅领先于被动式油气分离器。

关键词: 油气分离器；分离效率；机油携带量；永磁同步电机