Start-up, operation, attention, maintenance and maintenance of the rotary vane vacuum pump
Start-up, operation, attention, maintenance and maintenance of the rotary vane vacuum pump Start of rotary vane vacuum pump Before starting, check whether the cooling water of the water cooling pump can be turned on. When the ambient temperature is low, the pulley can be moved by hand to discharge the oil in the pump chamber into the fuel tank. Then press the motor button to send power, pay attention to whether the power direction can be reversed, and whether the pump rotation direction is correct. Rotary vane vacuum pump operation matters Check whether the vacuum pump oil can be in the vicinity of the oil mark line; do not drive too fast when connecting the pumped system valve, avoid a large amount of fuel injection; pay attention to the abnormal noise and impact sound during operation, pay attention to the pump oil temperature rise, Stop the pump immediately when there is partial overheating to avoid pumping or wear. Stop pumping matters The pump must be amplifying the gas from the pump inlet (the unit purchased has an automatic bleed valve); the water is cut off after the power is turned off. Maintenance and maintenance of rotary vane vacuum pump Do not mix different grades of pump oil; set a reasonable oil change interval (related to the operating conditions); when the pump is removed from the system, the pump port should be plugged to prevent dirt from entering the pump; the pump should adhere to the request during operation. Environmental conditions. Rotary vane pump repair The common problems of rotary vane vacuum pumps are as follows: 1 the degree of vacuum is reduced;  Fault Cause of production Sweeping method Low vacuum 1. Lack of oil Refueling to the center of the oil mark The motor is overloaded , As well as not to move, attack "stuck" phenomenon 1. The spring is damaged , causing the rotating piece to be unevenly stressed. Change spring Pump in operation 1. The spring is broken , and the impact sound of the rotating piece is emitted during the operation. Change spring Oil spill 1. Bearing, end cover, oil window, oil drain hole, fuel tank Interchange new seals; pay attention to the position when assembling Fuel injection 1. Too much oil Release excess oil start up 1. Oil temperature is too low Warm the oil to above 15 °C Pump not The pump coupling is damaged or the pulley key is damaged. Change the coupling or key Â
2 The pump is not working properly, and it is “killedâ€;
3 In operation, there is a lot of noise and noise;
4 pump body seal is not good - oil leakage;
5 At the time of starting, a large amount of oil droplets and oil mist will pollute the environment;
6 start tough.
The following is a list of common faults and solutions for rotary vane vacuum pumps for your reference:
2. Oil dirty or emulsified
3. Pump oil grade does not match or mix oil, summer use
Sticking too small oil
4. Air leaks
5. The clearance is too large ( or wear and scratches )
6. The oil path is blocked , and the pump cavity is not properly maintained.
Amount of oil
7. The temperature rise during pump operation is too high , so that the pump oil concentration
Thinning, poor sealing, and increased oil vapor pressure
8. When the diaphragm in the pump is pressed, the interference is too large , so that
The pump cavity is deformed and leaked
9. The exhaust valve is damaged and the seal is not good.
10. Improper assembly , the end cover screws are not tight
First , the rotor axis displacement
11 . Spinning is not good
12. The temperature of the pumped gas is too high.
13. The filter inside the intake pipe is blocked
14. Gas ball valve gasket is damaged or not tightened
Change oil
Change oil
Check shaft seals, exhaust valves, end caps, air intakes, etc.
Sealing of the part and repairing the seal
Check the pump cavity, rotor, rotary vane, end cover
Matching gap, clearing debris, impurities, according to fine
Request for grinding
The conditioning oil into the oil, with high-pressure cleaning
Blowing air through the hole, cleaning the deposits clean
Cool down by cooling water , check the fit clearance according to the fine
Request to stop repairing
Dressing the pump cavity or changing the pump, scrapping
Repair valve
Reassembly
Grinding the rotor and the rotation of the rotor , interchangeable spring
Hot gas is pumped into the pump before installation
Take out the air inlet filter to clean and dry
After reinstalling
Replace the gasket and tighten the gas ballast valve
2. Improper assembly , so that a part of the force
3. External dirt such as metal due to damage to the filter
Chips, particles, etc. fall into the pump cavity
4. The end face clearance is too small, the pump temperature rises too high
5. Pump oil is metamorphosed or fouled, and oil viscosity is not appropriate
6. Rotor damage
7. The shaft and bushing are too tight, and the oil is smooth.
8. The middle airway is not smooth
9. Broken cross joint in shaft
Reassembly
Disassemble the pump to check, clean, and install the filter
Grind the rotor rotor to adjust the clearance
Change oil
Re-matching new parts
Strong oil road smooth
Clear the middle airway or switch to a thinner oak
Leather pad
Repair rotor shaft or cross joint
In the middle
Noise
sound
2. Improper assembly, loose parts, resulting in operation
The sound is not normal
3. There is dirt in the pump chamber, and the parts have burrs or changes.
Shape, running disorder
4. The smoothness of the oil in the pump chamber
5. The harmful space in the pump chamber is too large
6. Motor problems
Reassembly
Washing, cleaning, inspection, grinding
Dredging and conditioning oil circuit
It is a disadvantage of the pump itself, which can offset the middle partition
a few centimeters to reduce harmful space
Repair motor
Damage to seals in other parts
Or without flattening
2. The cabinet has a leak
Indeed, the screws are tightened and the pressure is averaged appropriately
Plugging
2. Sudden exposure to the atmosphere
3. The original design of the pump is smaller
4. Pump rotor reversal
When starting the pump, be careful to start the motor intermittently. Department
If the system is damaged and exposed to the atmosphere, it should be noted that the shutdown is low.
Vacuum valve or clip
Adding oil and gas to the exhaust port to install it separately, and
The exhaust port is connected to the rubber tube and is taken away from the work site.
Reconnect power, commutation
difficult
2. Poor smoothness in the pump
3. The oil has been transformed or mixed into some kind of diffusion pump oil
4. When the pump is stopped, there is no atmosphere in the pump chamber, a large amount
Pump oil enters the pump chamber
5. The motor is disconnected from the phase power supply (the motor is silent at this time )
Ensure that the working room temperature is above 15 °C.
Conditioning oil circuit strengthens smooth
Change the proper mechanical pump oil
Pay attention to deflation when stopping the pump, check the differential pressure valve is
No work normally
Inspection power supply
Pumping
Make the rotor not turn
Two-stage pump rotor cross joint damage, high vacuum
Stage rotor does not turn
Pump inlet valve is not open
Exhaust valve plate damaged and broken
Change
Open the valve
Change the exhaust valve