Roots fan shutdown details
Roots FansIn the use of the process of meeting those conditions need to meet the normal stop meeting that kind of normal stop on the line? Roots fan small make up to open you to understand.
1. Emergency shutdown.
In the trial operation of the Roots fan in the process, in the event of the following circumstances - - when, to immediately emergency stop. Emergency shutdown operation is to press the main motor stop button, and then after the shutdown of the aftercare work.;
Sudden strong vibration of the fan, and has exceeded the tripping value; the body of the internal scratching or abnormal friction sound.;
Smoke appears in any of the bearings or seals, or the temperature of a bearing rises sharply to the alarm value; the oil pressure is lower than the alarm value and cannot be restored to normal; the tank level is low, and there is already a phenomenon of suction emptying.;
When the value of the shaft displacement shows a significant and continuous increase and reaches the alarm value.;
2. Normal downtime.
Gradually open the bleeder valve, and at the same time gradually close the exhaust valve; gradually close the intake air throttle to 20~25 degrees.;
Push the stop button and pay attention to any abnormal phenomenon during the stopping process.;
The oil supply can be stopped after 5~10min after the unit stops, or when the bearing temperature is reduced to below 45 degree Celsius. For units with floating ring seals, the sealing oil pump must continue to supply oil until the body temperature is below 80 degrees Celsius.;
After the unit has been shut down, the rotor is periodically coiled 180 degrees within 2~4 hours.
