微型高压空压机动力学优化设计

Dynamic Optimization Design of Miniature High-pressure Air Compressor

随着高压空气作为新型清洁动力源和冷却源的应用越来越多,微型高压压缩机便成为该领域研究的一项重点。传统的压缩机经验设计方法很难满足所有设计要求的最优方案。在传统热力设计的基础上,充分考虑压缩机的动力平衡特性,以各级缸径为主要设计变量,以各级气体力合力为优化目标开展多目标多变量优化研究。经过动力学优化设计,压缩机各级气体力相比传统设计更加均衡。气体力合力最大值降低了18.4%,合力的波动幅值降低了56.1%,同时指示功率也降低了4.2%。

With the high-pressure air being extensively used as a new clean power source and cooling source,the miniature high-pressure compressor has become a focus in this field.However,the traditional empirical design method is difficult to obtain the optimal compressor scheme that meets all the design requirements.Based on the traditional thermodynamic design,this paper fully considered the dynamic balance characteristics of the compressor and carried out multi-objective and multi-variable optimization research,with cylinder diameter of each stage as the main design variable and gas force of each stage as the optimization objectives.Through the dynamic optimization design,the gas force of compressor at all levels is more balanced than that of traditional design.The maximum aerodynamic force decreases by 18.4%,the amplitude of resultant force decreases by 56.1%,and the indicating power decreases by 4.2%.