关键词: 油气分离器；分离效率；机油携带量；永磁同步电机

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