基于CFD的滚动活塞压缩机吐油率优化分析

Optimization Analysis of Oil Circulation Rate in Rotary Compressor Base on CFD

本文通过数值模拟的方法分析了某款压缩机内部油气两相的流场,发现在其内部没有明显的回油通路。然后对在上腔增加挡油板、主平衡块处增加挡油板、增加转子和定子流通孔和在增加转子和定子流通孔的基础上在上腔增加双层挡油板四种改进的方案进行了分析,发现在前三种方案对流场结构影响不是很大,而增加转子和定子流通孔并增添双层挡油板能使转子流通孔成为主要的上油通道,然后在挡油板的离心作用下使油气分离,一部分油通过定子切边回到油池,回油通道比较明显。最后,对优化后的压缩机进行试验,测试结果表明,吐油率在整个频率范围内都被控制在0.5%以内,达到了设计要求。

Numerical simulations is applied to gas - oil flow analysis in a rotary compressor oil, revealing its interiorhas no obvious returned oil channel. Then, adding the oil baffle plate up and down of the rotor, increasing the rotorvent hole and stator vent hole and adding double oil baffle plate based on increasing the rotor vent hole and statorvent hole are used to reduce the OCR, finding that the last solution, adding double oil baffle plate and vent holes ofrotor and stator, can make the rotor vent holes become main oil passage, then oil and gas are separated by centrifugalcaused by oil plate, a part of the oil returns to the oil tank through the stator cut area. Finally, Prototype compressoris built - up to compare the original design, test results shows that, OCR during the whole frequency rangecan be controlled within 0. 5%, reaching the design requirement.