往复压缩机无级气量调节系统卸荷器动作特性研究

STUDY ON THE OPERATING CHARACTERISTICS OF UNLOADER OF RECIPROCATING COMPRESSOR STEPLESS CAPACITY REGULATION SYSTEM

往复压缩机无级气量调节系统在石化行业应用广泛,卸荷器作为系统执行机构的关键部件,其动作特性的优劣直接关系到气量调节系统的的效率及压缩机进气阀阀片的寿命。利用Ansys/Ls-dyna显式动力学软件首先模拟了压缩机额定转速下进气阀自动开启过程,并利用电涡流位移传感器测出了对应工况下阀片的动作位移,对比验证了模型的可靠性,在此基础上模拟了不同供油压力及不同顶出时间下卸荷器的动作,确定了较为理想的液压顶出力和顶出相位,并得出卸荷器的合理动作可有效缓解阀片振颤、改善阀片受力的结论。

Reciprocating compressor stepless capacity control system in the petrochemical industry are widely used,unloading device as a key component of the system actuator,the action characteristics of the relationship between the quality of the system directly related to the efficiency of the air intake system and compressor valve life.In this paper,ANSYS/Ls-dyna explicit dynamics software is used to simulate the automatic opening process of the intake valve at the rated speed of the compressor.The displacement of the valve is measured by the eddy current displacement sensor.On the basis of this,the operation of the unloader under different oil supply pressure and different ejection time is simulated,the ideal hydraulic ejection force and the ejection phase are determined.It is concluded that the reasonable action of the unloader can effectively relieve the vibration of the valve plate and improve the force of the valve.