Difficulties in obtaining component characteristics in the sub-idle state of rotor constrain the simulation capabilities of ground and windmill start-up processes for turbofan engines.This paper proposes a backbone fe...Difficulties in obtaining component characteristics in the sub-idle state of rotor constrain the simulation capabilities of ground and windmill start-up processes for turbofan engines.This paper proposes a backbone feature method based on conventional characteristics parameters to derive the full-state characteristics of fan.The application of the fan’s full-state characteristics in component-level model of turbofan engine enables zero-speed iterative simulation for ground start-up process and windmill simulation for windmill start-up process,thereby improving the simulation capability of sub-idle state during turbofan engine start-up.展开更多
The oil film clutch, which is superior in speed adjustment, is capable of being used in the belt conveyor to carry out soft start operation. According to running properties of both belt conveyor and oil film clutch...The oil film clutch, which is superior in speed adjustment, is capable of being used in the belt conveyor to carry out soft start operation. According to running properties of both belt conveyor and oil film clutch, equations that are used to decide the lubricating oil flow and the number of oil films (i.e. the number of rotating and stationary plates) are deduced theoretically. Also key parameters are provided for the design of the hydraulic system. All these together provide the theoretical basis for the soft start design of the belt conveyor and references for the application of the oil film clutch in similar fields.展开更多
论述了铁路局运输调度查询系统的重要性,介绍了Java Web Start技术的原理及优点,并以铁路局实时运行图查询系统为例说明了其具体实现方法,详细说明了该技术对于环境的要求,并给出了设置Web站点的具体步骤.同时,重点论述了JNLP文件的编...论述了铁路局运输调度查询系统的重要性,介绍了Java Web Start技术的原理及优点,并以铁路局实时运行图查询系统为例说明了其具体实现方法,详细说明了该技术对于环境的要求,并给出了设置Web站点的具体步骤.同时,重点论述了JNLP文件的编写方法和.jar文件的签名方法.使用Java Web Start技术可以方便地实现实时列车运行图的查询,可以为铁路局相关运输生产管理部门提供准确、及时完备的列车运行信息,为合理组织各项运输作业提供科学的依据.展开更多
文摘Difficulties in obtaining component characteristics in the sub-idle state of rotor constrain the simulation capabilities of ground and windmill start-up processes for turbofan engines.This paper proposes a backbone feature method based on conventional characteristics parameters to derive the full-state characteristics of fan.The application of the fan’s full-state characteristics in component-level model of turbofan engine enables zero-speed iterative simulation for ground start-up process and windmill simulation for windmill start-up process,thereby improving the simulation capability of sub-idle state during turbofan engine start-up.
文摘The oil film clutch, which is superior in speed adjustment, is capable of being used in the belt conveyor to carry out soft start operation. According to running properties of both belt conveyor and oil film clutch, equations that are used to decide the lubricating oil flow and the number of oil films (i.e. the number of rotating and stationary plates) are deduced theoretically. Also key parameters are provided for the design of the hydraulic system. All these together provide the theoretical basis for the soft start design of the belt conveyor and references for the application of the oil film clutch in similar fields.
文摘论述了铁路局运输调度查询系统的重要性,介绍了Java Web Start技术的原理及优点,并以铁路局实时运行图查询系统为例说明了其具体实现方法,详细说明了该技术对于环境的要求,并给出了设置Web站点的具体步骤.同时,重点论述了JNLP文件的编写方法和.jar文件的签名方法.使用Java Web Start技术可以方便地实现实时列车运行图的查询,可以为铁路局相关运输生产管理部门提供准确、及时完备的列车运行信息,为合理组织各项运输作业提供科学的依据.
