Rotary-vane vacuum pump are common fault maintenance method

in the actual operation, we will find that there are many common rotary-vane vacuum pump failure, can be divided into running fault and performance. In fact, rotary vane vacuum pump maintenance tips is that once the vacuum pump failure, we need to analyze the cause of the failure, and according to the problems and reasons, and proper maintenance of vacuum pump. This is critical, we need to pay attention to it. If the fault is not caused by this reason, you can use the cause of the problem with this corresponding maintenance, maintenance strategy, which may cause secondary damage to the vacuum pump. The small make up to explain the lower rotary-vane vacuum pump are common fault maintenance method.

a operation and maintenance, rotary vane vacuum pumps

1. start-up

start, check the cooling water pump through. When the environment temperature is low, can by hand moving pulley, into the tank of the oil from the pump chamber. Button and then press motor power, and pay attention to whether power direction reverse, the direction of rotation of the pump is correct.

2。 running note

check whether pump oil in the oil line; Nearby. Don't too quickly open the valve of pump system, in case of a large number of injection. During operation, pay attention to any abnormal noise and shock, pay attention to pump the oil temperature rise, such as a local overheating, should immediately stop the pump, to prevent pump or wear.

3。 Stop the pump note

when the pump is stopped, the air must be from the pump inlet discharge ( Generally buy device has automatic exhaust valve) ; After power, water will be cut off.

4。 maintenance

don't mix different brand of oil pump; Set the reasonable oil change period ( Related to the conditions of use) ; When the pump is removed from the system, should be sealed pump port, in order to prevent the dust into the pump. in use process should maintain the required environmental conditions.

2, common faults of rotary-vane vacuum pump are as follows:

1. does not rotate. If the situation is not clear, can't start the pump, to failure. It can be divided into manual and non manual.

2。 The temperature of the pump is too high. Refers to the low exhaust valve near the highest oil temperature of the measured values more than operating instructions. As the temperature increases, the pump oil viscosity will be greatly reduced, pump oil saturation vapour pressure will increase, which will increase the limit of the pump pressure, reduce the pumping efficiency. Rubber parts easy ageing. Thermal expansion reduced clearance operation, especially some nonmetal rotating plate thickness direction and copper set of inner hole clearance, affect the reliability of the pump operation. Pumps may be the cause of high temperature to high temperature, inlet temperature, inlet cooling device failure and long-term continuous operation of the pump inlet pressure is too high. Cooling water pump, water shortage, circulating water design result is bad. Temperature control water valve failure, etc.

3。 The spill. May occur in the shaft seal, the sealing face of the tank and water pump parts, oil drain plug, mark, oil plug, stator components and support the hole between the connection, air valve, etc. It may be the seal aging, improper installation, damage and failure, rough surface, impurity, coarse and loose castings. If after stopping the pump oil backflow, oil will enter the gas ballast valve and valve town might spill. When manufacturing rubber mat, must use oil resistant rubber. It should be the design of the original shape. If the seal face is too big, if the pressure is not tight, will leak.

4。 High power over standard. May be due to the high inlet pressure, exhaust pressure is too high, foreign bodies, plug into the fitting clearance, pump temperature is too high, too small ( Such as the rotor blades) , voltage is too high, too much causes such as the pump fluid back into the pump. This will damage the motor. Should avoid as far as possible near the maximum power run continuously for a long time. If the surface sediments, cleared on a regular basis.

three, rotary vane vacuum pump maintenance tips:

1, vacuum pump repair, ready to test.

2, judge fault, determine the failure problems. Accurate judgment could save trouble, and confirm to verify fault problem.

3, troubleshooting, simple after complex first, after the first easy to difficult. Vacuum pump unit without disassembly, can reduce due to the lack of special tools and new damage caused by improper operation, reduce the replacement and running time. In general, joining together the rotor is sealed, otherwise can't guarantee the shape and position tolerance, the rotor will be scrapped.

4, for the poisonous and harmful and corrosive pump, shall require the user to clean them first, and told them the necessary protective measures, to ensure the maintenance staff's health.

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