柴油发电机是一种小型发电设备,系指以柴油等为燃料,以柴油机为原动机带动发电机发电的动力机械。整套机组一般由柴油机、发电机、控制箱、燃油箱、起动和控制用蓄电瓶、保护装置、应急柜等部件组成。可用于各种家庭、办公室、大中小型企业日常发电以及应急发电。
温度及压力的控制在柴油机运行中非常关键,润滑油压力、燃油压力不足,柴油机将无法运行。目前的大功率中速柴油机大都有一套比较完整的监控检测系统,对柴油机的一些重要参数(如温度、压力等)进行监控,一旦这些参数超出设定范围就声光报警或自动停机。
柴油发电机组设有气缸排气、透平排气、主轴承、发电机定子、缸套水、润滑油等温度监测及燃油、起动空气、润滑油、生水、缸套水、油嘴水、进气等压力监测。这些温度及压力监测、报警及安全停机系统主要由装在控制屏上的CMR424、CMR524单元组成。
柴油机在运行中温度传感元件众多,但大致可分为热电阻(PT100)和热电偶(Ni-Cr/Ni-Al)2种类型。通过热电阻传感器在温度变化时阻值的变化和热电偶传感器在温度变化时热电势的变化,将信号传送到CMR424系统进行转化、比较、打印、显示并作用于报警或跳机。压力的变送主要是通过现场的压力变送器将信号传送到CMR424系统进行转化、比较、打印、显示并作用于报警或跳机。
A diesel generator is a small power generation device that refers to a power machinery that uses diesel or other fuels and a diesel engine as the prime mover to drive the generator to generate electricity. The entire unit is generally composed of components such as a diesel engine, generator, control box, fuel tank, starting and control battery, protective device, emergency cabinet, etc. Can be used for daily power generation and emergency power generation in various households, offices, large, medium and small enterprises.
The control of temperature and pressure is crucial in the operation of diesel engines. Insufficient lubricating oil pressure and fuel pressure will prevent the diesel engine from running. At present, most high-power and medium speed diesel engines have a relatively complete monitoring and detection system that monitors some important parameters of the diesel engine, such as temperature, pressure, etc. Once these parameters exceed the set range, an audible and visual alarm or automatic shutdown will be triggered.
The diesel generator set is equipped with temperature monitoring for cylinder exhaust, turbine exhaust, main bearings, generator stator, cylinder liner water, lubricating oil, etc., as well as pressure monitoring for fuel, starting air, lubricating oil, raw water, cylinder liner water, nozzle water, intake, etc. These temperature and pressure monitoring, alarm, and safety shutdown systems are mainly composed of CMR424 and CMR524 units installed on the control screen.
There are many temperature sensing components in diesel engines during operation, but they can be roughly divided into two types: thermistor (PT100) and thermocouple (Ni Cr/Ni Al). The signals are transmitted to the CMR424 system for conversion, comparison, printing, display, and applied to alarm or trip by detecting the changes in resistance value of the thermal resistance sensor and the changes in thermoelectric potential of the thermocouple sensor during temperature changes. The transmission of pressure is mainly achieved by transmitting signals to the CMR424 system through on-site pressure transmitters for conversion, comparison, printing, display, and application to alarm or trip.