摘要
燃气发动机通常配备压缩气启动系统,当启动气气源设计能力不足时,需配置高压气瓶进行启动。在控制阀失效工况下,高压可导致马达叶片受损,造成压缩机待产。针对上述情况,借助HYSYS动态模块,对使用高压启动气瓶的启动气流程进行模拟,涵盖正常启动及控制阀失效工况,剖析系统中压力和流量的变化过程。动态模拟结果显示:当启动马达前的电磁阀由发动机内部逻辑控制开启与关闭,且需对马达实施超压保护时,正常启动过程会致使安全阀起跳,此时可用自力式调节阀替代安全阀进行压力保护;同时,在控制阀上游合理设置孔板限流,能够有效减小安全保护装置的设计尺寸,并降低对下游马达的冲击,进而降低马达叶片损坏的风险。研究结果可为其他发动机启动系统的设计提供参考。
Gas engines are usually equipped with compressed gas starting systems.When the design capacity of the starting gas source is insufficient,a high-pressure gas cylinder needs to be configured for starting.Under the condition of control valve failure,the high pressure will cause damage to the motor blades,resulting in serious consequences.In response to the above situation,with the aid of the HYSYS dynamic module,the start gas process using high-pressure start gas cylinders was simulated,covering normal start and control valve failure conditions,and the change processes of pressure and flow in the system were analyzed.The dynamic simulation results indicate that when the solenoid valve in front of the starting motor is opened and closed by the internal logic of the engine and overpressure protection of the motor is required,the normal starting process will cause the safety valve to trip.At this time,a self-operated regulating valve can be used instead of the safety valve for pressure protection.Meanwhile,reasonably installing an orifice plate upstream of the control valve to limit the flow can effectively reduce the design size of the safety protection device and the impact on the downstream motor,thereby reducing the risk of damage to the motor blades.The research results can provide a reference for the design of other engine starting systems.
作者
陈万贵
郭美那
郭志成
李睿夫
范学君
CHEN Wangui;GUO Meina;GUO Zhicheng;LI Ruifu;FAN Xuejun(Offshore Engineering Co.,Ltd.,Tianjin 300452,China)
出处
《山东化工》
2025年第12期183-186,共4页
Shandong Chemical Industry
