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New Calibration Technology for Safety Valves of Utility Boiler 被引量:5
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作者 张传虎 刘琨 《Electricity》 2001年第4期44-49,共6页
Butterfly spring-relief valve, a crucial safety attachment of pressure vessel, is used to prevent pressuresystem from exceeding allowable limit value. Safe, expeditious and accurate calibration of safety valves is con... Butterfly spring-relief valve, a crucial safety attachment of pressure vessel, is used to prevent pressuresystem from exceeding allowable limit value. Safe, expeditious and accurate calibration of safety valves is consequentlyof vital importance to safe and economic operation of generating units. NSH CALIBRATOR could complete, not only theon-line performance and parameter tests of safety valves within two to five seconds with opening pressure of safetyvalves and steam medium pressure automatically recorded, but also could complete the on-line adjustment of safetyvalves verified unqualified. It saves energy consumption, decreases noise pollution and improves accuracy and efficiencyof safety valve calibration.[ 展开更多
关键词 on-line calibrator butterfly spring-relief valve error analysis data processing performancecharacteristics analysis
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DESIGN AND EXPERIMENT OF ELECTRIC BUS
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作者 Sun Fengchun Chen Yong Zhang Chengning Sun Liqing School of Vehicle and Transportation Engineering,Beijing Institute of Technology, Beijing 100081,China 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2002年第1期57-61,共5页
Performance and reliability experiments on BJD-6100EV electric buses, jointlydeveloped by Beijing Institute of Technology and Beijing Public Transport Company, are introduced.Output power model of battery pack is esta... Performance and reliability experiments on BJD-6100EV electric buses, jointlydeveloped by Beijing Institute of Technology and Beijing Public Transport Company, are introduced.Output power model of battery pack is established and maximum output power is analyzed. A permanentmagnetic direct current (PMDC) motor with enhanced windings is developed for the bus. Torque-speedcharacteristics of the motor are modeled and performance of electric bus is analyzed. Computationalmethod of the range of electric bus is proposed and discussed. Experiments show that electric buscan realize design requirements. Computational methods are verified with the help of field test. Itis expected that design and computation method will provide helpful reference to development ofelectric vehicles. 展开更多
关键词 Electric bus Storage battery Electric motor RANGE performancecharacteristics
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