Abstract
Regulating capacity by controlling suction valve has a good application value for the large-scale reciprocating compressor used in the petrochemical industries. A mathematical model coupled with compressor, actuator and hydraulic system is built in this paper, and some performances of the system are tested by the experiment. The results show that the maximum displacement of actuator increases with the oil pressure until it is limited by the lift limiter. The low hydraulic oil pressure leads to the partially opened condition of suction valve, and the valve plate impacts on the actuator at the same time, which influences the accuracy of indicated powers and mass flow rate. The reset response time of valve plate cannot be improved by increasing oil pressure after the actuator is completely opened. The mass flow rate decreases with the hold time after the closing process of suction valve is delayed until nothing is discharged. The reset response time can be improved by increasing the reset spring stiffness and the path diameter of solenoid valve, or decreasing diameter of hydraulic cylinder. All the power consumption and mass flow rate decrease apparently caused by the delayed compression process. The power consumption decreases 21% when the capacity is 70% of the full load based on the experiment.
Published Version
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