| Baotou Steel Group as a large domestic iron and steel enterprises,is in a critical period of climbing the summit to adapt to the new normal development.Railway transportation is the main artery of the production and operation of the enterprise,and it is the bridge between the enterprises’ production and operation.With the characteristics of fast transportation,large volume,low cost,safety and reliability,etc..In railway transportation,the internal combustion engine has an irreplaceable position.With the continuous increase in the production of steel and steel,the development of the logistics enterprise,the railway transportation to the quality of the internal combustion engine will also have higher requirements.The existing GK0 type diesel locomotive of the Transport Department of the company is still using the traditional relay control operation of the air cylinder speed controlsystem..The speed regulator is a full program of mechanical regulator The main problem is that the relay chain control is too much,the wiring is complex,the reliability is poor,the control circuit is complex and the accuracy of speed regulator is poor.It Influences the stability of engine,fuel economy and efficiency seriously.In this paper,the speed control system of GK0 type locomotive is redesigned,and the electric control adopts PLC logic control system.The hardware of the PLC control system is selected and the software is programmed.Using the stepper motor and gear transmission device to control the speed regulating system of diesel engine.Redesigning and matching the transmission device According to calculate and analyze the main sensitive element of speed regulator,the optimization measures of sensitive element in the speed regulator is designed.After the tests including the vehicle speed stability test,the fuel injector intact rate test and the fuel economy test of the optimized diesel engine speed regulation system at the diesel engine performance test station,the reliability of the new designed speed regulation system is verified,system faults rate has dropped about 40%.And the stepless speed regulation of the locomotive is realized.Maximize the potential of the original governor.Experimental results show that the optimization of the mechanical governor is greatly improved,caused by the fault of speed control system of locomotive repair rate is significantly reduced.Improve the reliability,economy and stability of locomotive operation. |
