Factors affecting the vacuum pump

- Jan 30, 2019-

1. Research on working steam and its dryness:

The low steam pressure and pressure fluctuation have a great influence on the capacity of the vacuum pump. Therefore, the steam pressure should not be lower than the required working pressure, but the vacuum pump structure design has been fixed, and excessively increasing the steam pressure does not increase the pumping capacity and vacuum. degree. In addition, to ensure that the steam pressure supplied by the boiler is stable, it is better to use a boiler to supply working steam to the steam jet pump so that the steam pressure does not fluctuate and the vacuum pump performance is stable.


2. Research on the requirements of circulating cooling water:

If the cooling water supply is insufficient, the condenser will generate heat, the airflow sound will become louder, the vacuum will drop rapidly, and even the steam will return to the exhaust pipe. The condensed water plays a decisive role in the multi-stage vacuum pump. The condensed water can condense the steam sufficiently. The partial pressure of the water vapor in the vacuum pump discharge pressure must be higher than the corresponding full steam pressure, so the temperature of the condensed water is also lower than The full temperature under this pressure can ensure the normal operation of the pump body.


3. Research on the sealing requirements of the vacuum pump system:

When the vacuum pump is in the limit state, the first stage discharges little or no water. Therefore, the first stage pump has a large amount of water discharged, which can be considered as a leak in the system. The usual causes of air leakage are: the gasket is not installed, misplaced or damaged, the bolt is not tightened, the flange surface is damaged, the weld seam has trachoma, and the joint (pressure gauge, vacuum gauge, etc.) is not installed.


4. Research on nozzle requirements:

Nozzles are important components that affect the performance of vacuum pumps. Problems such as nozzle misassembly, clogging, clogging, damage, corrosion and leakage, no matter what precautions are taken, nozzle clogging is inevitable. On the one hand, due to the installation of the steam pipe, the residual iron chips and welding slag in the pipe will block the nozzle; on the other hand, when the vacuum pump system is deactivated, the steam pipe is easy to rust, and the rust spots fall and block the nozzle during use.