压缩机节能调控系统液压参数优选与影响分析研究

Optimization and Impact Analysis on the Hydraulic Parameters of Energy-saving and Control System in Reciprocating Compressor

液压驱动的节能调控系统在我国石油化工行业往复压缩机上应用广泛,是压缩机实现节能降耗和高效运行的关键设备。液压装置提供的卸荷器驱动力直接影响气量调节精度、压缩机进排气温度以及机组振动。本文建立了液压驱动执行机构的工作数学模型,结合FLUENT仿真对压缩机气量调节变工况状态下的工作过程进行模拟,获得了变工况状态下气缸内动态压力特征;利用压缩机试验台对仿真结果进行了验证研究,获得了不同液压驱动力对应的气量调节效果,及卸荷器与阀片的瞬态运动规律,验证了仿真研究的正确性。在此基础上,提出了液压参数优选方法,为气量调节系统优化设计提供了技术支撑。

The hydraulically driven energy-saving and regulation system is widely used in reciprocating compressors of petrochemical industry and is a key equipment which enable compressors to achieve energy conservation,consumption reduction and efficient operation.The driving force of unloader provided by the hydraulic system directly affects the regulation precision of the discharge capacity,suction and discharge temperature of the compressor and vibration of the unit.A mathematical model of the actuator driven by hydraulic system was established and simulations were conducted on the working process of the compressor under variable working conditions for discharge capacity in combination with Fluent simulation to obtain dynamic pressure characteristics of the cylinder under variable working conditions.The simulation results was verified using the compressor test bench,the capacity regulation effects corresponding to different hydraulic driving forces and the transient motion rules of the unloader and valve plate were obtained,which verified correctness of the simulation study.On this basis,the optimization method of hydraulic parameters was proposed,which provides technical support for optimization design of the discharge capacity regulation system.