设计了一款新型复式油气分离器，采用迷宫式结构作为粗滤组件、滤网作为精滤组件。设计开发了油气分离器部件性能试验台，通过正交试验设计方法设计多方案油气分离器，并基于部件试验台进行多方案性能试验测试。最终设计出满足要求的复式油气分离器，并通过整机试验验证其性能。结果表明，油气分离器综合性能影响因素由强到弱依次为滤网层数、滤网目数、过滤孔孔径、孔数、孔板间距。整机试验发现在300 L/min窜气量下分离效率达到了92.6%，压力损失小于3 kPa，满足发动机使用要求。
A compound oil-gas separator was devised, which included the coarse filtration of labyrinthine structure and the fine filtration of filter mesh. An oil-gas separator component performance test bench was further developed, and multiple oil-gas separator schemes were designed by using the orthogonal test design method. Performance tests of multiple schemes were conducted based on the component test bench. Ultimately, a compound oil-gas separator meeting the requirements was designed and its performance was verified through engine test. The results indicate that the factors influencing the overall performance of oil-gas separator are the number of mesh layers, mesh count, filter hole diameter, number of holes, and hole plate spacing in order from strong to weak. Engine test revealed that the separation efficiency reached 92.6% and the pressure loss was less than 3 kPa at a blow-by rate of 300 L/min, which met the requirements of engine use.
