真空度降低

• reason：

  • Insufficient oil volume, dirty oil, emulsification, or pump oil that does not meet the requirements, resulting in a decrease in lubrication and sealing performance.
  • Leakage, such as inadequate sealing of components such as shaft seals, exhaust valves, end caps, and air intakes.
  • Excessive clearance or wear may affect the sealing inside the pump chamber.
  • The temperature rise during pump operation is too high, resulting in a decrease in pump oil concentration and weakened sealing.
  • Improper assembly, such as inconsistent tightness of the end cover plate screws, can cause the rotor axis to shift.
  • The gasket of the gas damper is damaged or not tightened, which affects the gas balance in the pump chamber.

• solution：

  • Check the oil level and promptly replenish or replace the pump oil that meets the requirements.
  • Regularly inspect and replace seals to ensure that all components are well sealed.
  • Check the clearance between the internal components of the pump chamber, remove debris, and grind as required.
  • Cool down with cooling water to avoid excessive pump temperature.
  • Reinstall the vacuum pump to ensure that all components are installed correctly.
  • Replace the gasket of the gas damper and tighten the gas damper.

The pump cannot operate normally

• reason：

  • The spring damage causes uneven force on the rotor, affecting the normal operation of the pump.
  • Improper assembly can cause local stress, such as foreign objects obstructing the rotor and pump chamber.
  • The filter screen is damaged, and external dirt has entered the pump chamber.
  • The fit between the shaft and sleeve is too tight, and there is a lack of oil lubrication.
  • The cross joint in the shaft is damaged, affecting the rotation of the rotor.

• solution：

  • Replace the damaged spring to ensure even force distribution on the rotor.
  • Reinstall the vacuum pump to ensure that all components are installed correctly and there are no foreign objects obstructing it.
  • Disassemble the pump, inspect and clean it, and replace the filter with a new one.
  • Check whether the tightness of the components is appropriate and strengthen the lubrication of the oil circuit.
  • After repairing and replacing the rotor shaft or cross joint, check if it can be used normally.

There is loud noise and noise during homework

• reason：

  • The spring fracture caused the impact sound of rotating blades during operation.
  • Improper assembly and loose parts result in abnormal operating sound.
  • The harmful space inside the pump chamber is too large, resulting in high noise.
  • There are dirt and deformed parts in the pump chamber that cause obstacles to operation.

• solution：

  • Replace the broken spring and eliminate the impact sound.
  • Find professional technicians to inspect and reassemble the vacuum pump if necessary.
  • Shift the middle partition by a few centimeters to reduce harmful space.
  • Disassemble, clean, inspect, and grind the pump body, remove dirt, and repair deformed parts.

Pump body oil leakage

• reason：

  • Seals such as bearings, end caps, and oil windows are damaged or not pressed smoothly or tightly.
  • The box has a leak hole, causing oil leakage.

• solution：

  • Replace with new seals or tighten screws, and apply appropriate pressure.
  • Block the leakage hole to prevent further oil leakage.

Inject a large amount of fuel during startup

• reason：

  • The oil level is too high, exceeding the center position of the oil gauge.
  • Sudden exposure to the atmosphere causes a sharp change in pressure inside the pump.
  • The fuel tank is small and cannot accommodate too much oil.
  • Reverse rotation of the rotor affects the normal operation of the pump.

• solution：

  • Release excess oil and ensure that the oil level is at the center of the oil gauge.
  • When starting the pump, use intermittent start-up to avoid sudden exposure to the atmosphere.
  • Install an oil gas separation device at the exhaust port and connect a rubber hose at the exhaust port to guide it away from the work site.
  • Reconnect the power supply and reverse the direction to ensure the rotor rotates normally.