Vacuum pump is an important equipment that can produce high vacuum, which is widely used in various fields, such as semiconductor, medical, chemical, aerospace and so on.

However, when using vacuum pumps, sometimes insufficient suction occurs, which seriously affects the working efficiency and accuracy of the equipment. In this paper, the causes of insufficient suction of vacuum pumps will be discussed and the corresponding solutions will be proposed.

Causes of insufficient suction

1. Damage to the pump

In the process of long-term use of vacuum pumps, mechanical parts may be damaged, such as pistons, impellers, bearings, etc.

These damages can lead to a decrease in the sealing performance of the pump, which affects the suction force of the pump.

2. The running speed of the pump is insufficient

The suction of the mechanical pump mainly depends on the running speed of the pump. If the running speed of the pump is insufficient, it will lead to insufficient suction of the pump.

The possible reason is that the motor power of the mechanical pump is insufficient or the mechanical parts are worn seriously.

3. The sealing performance of the pump is poor

The sealing performance of mechanical pump is one of the key factors to ensure pump suction. If the sealing performance of the pump is poor, it will cause the suction of the pump to decrease.

The possible reason is the aging of the gasket, the wear of the sealing surface, or the uneven sealing surface.

4. The air inlet of the pump is blocked

Obstruction of the intake of the mechanical pump can also lead to insufficient suction of the pump.

The possible reasons are that the inlet is blocked by foreign bodies, the pipeline is blocked or there is air leakage at the inlet.

5. Excessive back pressure of the pump

Excessive back pressure of the mechanical pump can also lead to insufficient suction of the pump. The possible reason is that there is a large resistance part in the pipeline or the pipeline design is not reasonable.

The Solution

1. Overhaul the mechanical pump

When the mechanical pump is damaged, it is necessary to repair or replace the mechanical parts to ensure the normal operation of the pump.

2. Improve the running speed of the pump

If the running speed of the pump is insufficient, the running speed of the pump can be increased by increasing the motor power, replacing the mechanical parts, etc., to improve the suction of the pump.

3. Improve the sealing performance of pump

Improving the sealing performance of the pump is one of the important measures to solve the lack of pump suction.

The sealing performance of the pump can be improved by replacing the sealing pad and repairing the sealing surface. 

4. Clean the air inlet of the pump

When the inlet of the pump is blocked, it is necessary to clean the inlet to ensure the normal suction of the pump.

5. Reduce the back pressure of the pump

When the back pressure of the pump is too large, it is necessary to redesign the pipeline or replace the part with large resistance in the pipeline to reduce the back pressure of the pump, so as to improve the suction of the pump.

In short, there are many reasons for the lack of suction of the vacuum pump, and the corresponding solution needs to be taken according to the specific situation.

When using the vacuum pump, it is also necessary to pay attention to maintenance and maintenance, regular inspection and replacement of mechanical parts to ensure the normal operation of the pump.