Common failures of rotary vane vacuum pump

I. operation and maintenance of rotary vane vacuum pump 1. Start of pump: check whether the cooling water of water cooling pump is connected before starting. When the ambient temperature is low, the pulley can be moved by hand to discharge the oil in the pump chamber into the oil tank. Then press the motor button to send power, pay attention to the direction of the power supply is connected to the wrong, the pump rotation direction is correct. 2. Precautions for pump operation: check whether the pump oil quantity is near the oil mark line; Do not open the valve of the pumping system too fast to prevent large amount of oil injection; Pay attention to the abnormal noise and impact sound during operation, pay attention to the high oil temperature rise of the pump, stop the pump immediately when there is local overheating, to prevent stuck pump or wear. 3. Matters needing attention when stopping the pump: air must be released from the pump inlet when stopping the pump (generally, all units purchased have automatic air release valve); Cut off the water after the power is off. 4. Pump maintenance: do not mix different grades of pump oil; Determine a reasonable oil change period (related to the service conditions); When the pump is removed from the system, the pump mouth shall be sealed to prevent dirt from entering the pump; Pump in use should maintain the required environmental conditions. Ii. Common failures of rotary vane vacuum pump are as follows: 1. Reduced vacuum; 2. The pump cannot operate normally, or even "stuck". 3. In operation, there are large noises and noises 4. Poor sealing of pump body -- oil leakage 5. Large amount of oil droplets and oil mist will pollute the environment at startup Rotary vane vacuum pump smoke and oil injection: refers to the rotary vane vacuum pump in the operation of the exhaust port smoke and oil injection. Smoke: if the pump has just started to operate smoke signs, is normal, if the smoke is not normal. Treatment: smoke to clarify the pump inlet, including pipes, valves, containers have patching environment. If the penalty is dealt with after the leak detection, the smoke will end. Oil injection: to clarify that there are a large number of leakage points outside the air inlet, and even the air inlet is exposed to the atmosphere. The way of handling: seal the air inlet of the pump to make the pump run, if not spray oil, clarify the leakage point; Exhaust valve piece damage, check whether the exhaust valve piece damage, change the bad exhaust valve piece Four, rotary vane vacuum pump noise: here refers to the noise of the pump. Knock cylinder: pump operation is not disciplined sound, like the sound of metal knocking metal. This is the blade hitting the pump The sound of. This environmental strain is caused by the spring break between the paired rotor blades, which is probably caused by contraction or eject failure. The way of handling: open the pump to check whether the disc spring damage. Changed spring. Exhaust valve noise: tension is a rotary vane vacuum pump exhaust valve disc damage.
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