Common faults and solutions of vacuum annealing furnace

Vacuum annealing furnaces may encounter various faults during use. Here are some common faults and their solutions:

1. The vacuum degree does not meet the requirements
Reason for malfunction:
The seal is aging and leaking.
Vacuum pump malfunction.
Pipeline blockage.
Heating element aging and damage.
Temperature control system malfunction.
resolvent:
Check the condition of the seals and repair or replace aging seals.
Check the working condition of the vacuum pump and perform necessary maintenance or replacement.
Check the pipeline, clean any blockages, and ensure that the pipeline is unobstructed.
Check and replace damaged heating elements.
Check the sensors and controllers of the temperature control system, repair or replace the problematic parts.

2. Vacuum system leakage
Reason for malfunction:
The sealing ring has aged, failed or permanently deformed.
The gasket of the pneumatic valve is damaged or not tightened.
The exhaust valve plate is damaged.
resolvent:
Replace the aging sealing ring.
Check and replace the damaged gasket of the pneumatic valve, ensuring that the gasket is tightened.
Replace the damaged exhaust valve plate.

3. Vacuum pump malfunction
Reason for malfunction:
Excessive leakage in the pump (such as clearance caused by wear between the slide valve and the pump chamber, and excessive clearance between the slide valve ring and the pump wall).
The pump temperature is too high.
There are debris falling into the pump.
The pump oil has deteriorated and its viscosity has increased.
Motor malfunction.
The bearing clearance is too large.
resolvent:
Check and repair the internal leakage problem of the pump, such as replacing worn parts.
Reduce the operating temperature of the pump or increase cooling measures.
Clean the debris inside the pump.
Replace the deteriorated pump oil.
Check and repair motor faults.
Adjust the bearing clearance or replace the bearing.

4. Power and electrical component failures
Reason for malfunction:
The power supply is unstable.
Aging of electrical components.
Control system malfunction.
resolvent:
Check the power supply to ensure stability.
Check and replace aging electrical components.
Maintain or upgrade the control system to ensure its normal operation.

5. Cooling system malfunction
Reason for malfunction:
The cooling water circuit is blocked.
Cooling pump malfunction.
Temperature controller malfunction.
resolvent:
Clean the cooling water circuit to ensure smooth flow.
Check and maintain the cooling pump to ensure its normal operation.
Repair or replace the faulty temperature controller.

6. Emergency response measures
During the production process of vacuum annealing furnace, there may be emergency situations such as power outage and water outage. In this case, the following emergency measures should be taken:
During a power outage:
Immediately turn off the total power of the device.
Close the vacuum valves of each pipeline to prevent air from entering the vacuum furnace.
Activate emergency nitrogen or emergency cooling water measures to ensure equipment safety.
When there is a water outage:
Switch the cooling water to emergency tap water supply.
If there is no cooling water for a long time, the heating should be stopped immediately and the water pressure should be restored to normal before starting heating from scratch.

In summary, the common faults of vacuum annealing furnaces involve multiple aspects, and corresponding solutions need to be taken for different causes of faults. Meanwhile, in emergency situations, effective emergency response measures should be taken to ensure equipment and production safety.