What is the reason why the vacuum degree of the silicon carbide reaction sintering electric furnace cannot reach the target value?

04-08-2025       Author: KJ technology

The vacuum degree of silicon carbide reaction sintering electric furnace cannot reach the target value due to various reasons. The following are some common reasons and their analysis:

Vacuum pump issue:

Pump oil pollution, insufficient or too thin: This can affect the pumping efficiency of the vacuum pump.

Poor or damaged operation of the vacuum pump, such as overheating of the pump or expansion of components resulting in insufficient clearance.

Diffusion pump issue: Damage or abnormal oil level in the diffusion pump can also lead to insufficient vacuum.

Solution: Clean the vacuum pump and replace it with new vacuum pump oil; Inspect and repair or replace damaged vacuum pump components; Ensure that the diffusion pump is complete and the oil level is normal.

Sealing issue:

Aging, corrosion or damage of seals: This can cause air leakage and affect the vacuum level.

Loose pipeline connections: Loose pipeline connections can also cause air leakage.

Electromagnetic valves, pipe joints, vacuum pump suction valves, and sealing gaskets around the working chamber are leaking: the sealing performance of these components has a direct impact on the vacuum degree.

Solution: Check and replace aging or broken seals; Ensure that the pipeline connections are tight; Check and repair or replace leaking solenoid valves, pipe joints, and other components.

Extraction time issue:

The pumping time is too short: If the pumping time is insufficient, the vacuum degree may not reach the target value.

Solution: Extend the pumping time to ensure that the vacuum degree reaches the target value.

Filter issue:

Blockage of the suction filter: This will affect the suction efficiency of the vacuum pump.

Solution: Clean or replace the exhaust filter to ensure that it is unobstructed.

Other system issues:

Control system malfunction: such as damage to the power supply circuit of the control system, damage or aging of internal components, etc., may cause the vacuum pump to malfunction.

The O-ring of the suction valve falls off: This will affect the sealing performance of the vacuum pump.

Oil return valve blockage: This can cause the vacuum pump to leak oil, affecting the vacuum degree.

Solution: Check and repair the control system; Reinstall the O-ring of the suction valve; Clean the return valve.

Operational issues:

Improper operation: Failure to follow the operating procedures may result in the vacuum degree not reaching the target value.

Solution: Strengthen operator training to ensure that operations are carried out in accordance with the operating procedures.