In fact, normal shutdown can be divided into many methods, but no matter what method, it must comply with certain operating specifications, otherwise it will lead to abnormal shutdown of the blower and affect the next use of the blower. Normal shutdown of centrifugal blower can be divided into the following steps. First, hold down the stop button of the blower, and observe whether the blower has any special abnormal phenomena during this short process. Then gradually turn down the intake throttle valve to 20~ 25%. Gradually open the vent valve (or outlet bypass valve) and gradually close the exhaust valve. After the unit stops for 5 ~ 10min, or when the bearing temperature drops below 45*C, the oil supply can be stopped. For units with floating ring seals, the seal oil pump must continue to supply oil until the body temperature is lower than 80 ℃. Until this step, the shutdown process of the blower is almost completed, and there is another step that the user needs to do patiently, that is, after the centrifugal blower stops rotating, the rotor 1800 needs to be rotated regularly within two to four hours.
Usually called emergency shutdown by users, should not be used without authorization unless it is urgent. The operation of emergency stop is to press the stop button of the main motor, and then carry out the aftercare work after the stop. Generally, forced shutdown can be used when encountering the following phenomena. Smoke occurs in any bearing or seal, or the temperature of a certain bearing rises sharply to the alarm value; There is scratch or abnormal friction sound inside the machine body; The axial displacement value increases obviously and continuously, when it reaches the alarm value; When the oil pressure is lower than the alarm value and cannot return to normal; The centrifugal blower suddenly vibrates strongly and has exceeded the trip value.