外文翻譯---可編程控制技術(shù)在船用鍋爐控制系統(tǒng)中的應(yīng)用-其他專業(yè)-展示頁
2025-01-31 09:24本頁面
【正文】 was mad (3) Steam pressure intermittent control According to boiler steam pressure p AND gate limiting value p1 (, p2 (approximately ) controls two spray holes approximately) the work When pp1,1, the 2 spray hole closes。 Line bank L, Like chart 1 shows The first six parts are the control device basic position This installment additionally builds auxiliary relay unit JB including four 8 ports intermediate relay J1, J2, J3 and J4 and 12 ports light controls relay JGC. When the controller output must actuate the highpower load, Needs to carry on the voltage or the power conversion through the intermediate relay The intermediate relay besides pletes the host which it undertakes to control the function, Also provides many vice auxiliary ports, May use for the interconnection related equipment or put through the condition indicating lamp, Does this may save the host to control the unit the hardware resources After establishment line bank, The power source, the PC board, examine the ponent, carries out the ponent, operates the button, the display lamp and so on the plete contact all links to the line bank plug in, This for the equipment setup, the service and the search breakdown has provided the convenience System each part of positions and connection。 Display monitor IB。 Examination unit Cooperation unit OB。 The application of PLC technique in the control of marine boilers Programmable foreword controller, Is called PC or PLC, It appears causes the control domain faced with a technical transformation Take the relay as the foundation engine room control device structure plex, the ponent are many, The reliability is bad, The breakdown sometimes occurs The current our country ships use the import plete set control device, Its function consummates, The reliability is also high, But the price is expensive Number year ago, I use import PLC am the controller, Own design the hardware, Establishment control procedure, Develops successfully the PCGC programmable boiler bustion control installment, Substitutes for the English HAMWORTHY Corporation product In the near future the similar product will pare with this pany, Performance quite, The price only is its ~ year, Altogether has PCGC to install 12 sets in Dazing 414 and so on 6 Strip oil tanker solid ship use, Experiences the South China Sea storm and the nearly 70 ℃ high temperature adverse circumstance tests, Moves good, Does not have a breakdown The experience indicated, Introduces the minority essential ponent, According to concrete control system request, Designs the appropriate software and the necessary hardware, Is the ships technological transformations and the equipment disposition good means 1 system position The system is posed by below several parts: Programmable foreword controller PC。 Power source PS。 Actuation unit M。 Auxiliary relay unit JB。 2 Systems controls request Burning management control (1) Fuel oil choice The fuel may choose the heavy oil or the light oil If choice heavy oil, The oil temperature must in 80 ℃ above, The side can carry on burning The oil temperature is lower than 80 ℃ ,Then blowingout, And the start heats up the installment to heat up to the heavy oil (2) Combustion control According to the start, front sweeps the gas, the ignition, opens the 1 spray hole, opens the 2 spray hole the order to start boiler burning。 When p1pp2,The 1 spray hole alone works。 (4) Boiler water monitor the boiler water level uses the pair of position control mode, which knew very well,
試題試卷相關(guān)推薦
鄂ICP備17016276號-1