伯力鸠斯立磨3hydraulic-function-modified课件1.ppt
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- 伯力鸠斯立磨 hydraulic function modified 课件
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1、Page 1Page:1ReservoirPumpPumpComponents descriptionY1,Y3,Y5,Y7 are called pressure valvesY2,Y4,Y6,Y8 are called pressure relief valvesElectrically actuatedComponents descriptionY1,Y3,Y5,Y7 are called pressure valvesDe-energized,normal openenergized,valves closedComponents descriptionDe-energized,nor
2、mal closedenergized,valves openY2,Y4,Y6,Y8 are called pressure relief valvesComponents descriptionNo-load start up operation When the mill has been at a standstillfor 2 to 4 hours,but just once per 24 hours,the pistons of the hydraulic cylinders are drawn into their end positions(alternately always
3、2 x),in order to ensure an exchange of oil in the area of the seals.In all other cases,the starting procedure begins with pressurizationto the start-up pressure.No-load start up operation and switching on the pump 1.through the non return-valveNo-load start up operation Starting procedure 1Pressuriz
4、ing all the cylinders to the starting pressure.2Balancing of the roller pair units by means of the ultrasonic measuring devices.3After the mill main drive has been running for approx.1 minute(adjustable,one complet table turn)pressurizing to working pressure.Release for starting the mill1Pressurizin
5、g all the cylinders to the starting pressure.Before the main drive starts running,the cylinders must be pressurized to a lower value than the working pressure,in order to reduce the required starting torque.Pressurizing to starting pressure All the pressure valves Y1,Y3,Y5,Y7and the pressure relief
6、valves Y2,Y4,Y6,Y8 are energizedThe pumps are running and.The hydraulic cylinders are pressurizedto the pressure value set at thepressure relief valves Y2,Y4,Y6 and Y82The measured values of the ultrasonic measuring devices are compared.If the difference betweenthe working side and the fixed side of
7、 one roller pair unit is greater than 50 mm,the hydraulic cylinders are balanced.Balancing of the roller pair units by means of the ultrasonic measuring devices.Balancing of the roller pairs units The measured values of the ultrasonicmeasuring devices are comparedIf the measured value at the cylinde
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