Main factors affecting the function of vacuum pump

1, the impact of condensed water:

Condensed water has of little importance position in the multi-stage vacuum pump, in order to ensure that the condensed water can be full of steam condensation, water vapor pressure in the pressure shall be higher than the corresponding full steam pressure vacuum pump, so the condensed water temperature should be lower than the pressure under the full temperature,

To ensure the normal operation of the pump body. In addition, condenser condensing power is also very important, condenser condensation effect is poor, will make the steam because it is too late to condense directly into the next stage of the pump, increase the load of the pump, the influence of the pump's pumping ability. To this end, the inlet temperature of condensate water

The application of the condenser and the condenser has a great influence on the function of the pump.

2, the impact of steam:

We use the vacuum pump for the steam eruption vacuum pump, is full of steam as the working medium, the status of steam on the pump has a decisive impact on the function. Wet steam not only affects the function of the pump, but also corrosion of the steam nozzle, add the amount of steam pump, so that the pump operating conditions change

Unstable.

3, internal leak:

In the whole process of liquid steel treatment, the vacuum degree of the system increases with the decrease of the amount of liquid gas. In the early stage of the treatment of liquid steel, the system vacuum is low, the amount of gas is large, the demand of the first stage pump pumping capacity can be large, usually choose a number of pumps in parallel to increase the amount of pumping system

. However, when the vacuum degree of the system increases, the amount of gas is reduced. In order to reduce the steam consumption and save energy, a few of the pumps in the front stage are needed to be closed. Pump layout of the 3A, 3B, 4A, 4B is known as the pre pump, or called the pre pump, B1, B2 called booster pump.

When the pump input, B1, B2, 3B, 4B pump closed. The layout system is visible through the two check valve with 3B and pump 4B connection, if the two check valve switch is not in place, may have leaked, will give the system can influence the formation of particular valve leakage will

The formation of short circuit system, so that the upper pump due to the high back pressure and can not work properly, showing a double vacuum image. Secondly, the nozzle of the vacuum pump is composed of two parts, the two parts are connected by flange, the flange on the pump in the body of the vacuum pump, if the junction because of the sealing edge

Formed by the steam leak, will also influence the formation of pump function.

4, the pump body layout:

Single stage vacuum pump, a simple wear parts of the steam nozzle, the nozzle is worn, not only will affect the function of the pump, but also to increase the operating costs of the system.

5, the impact of the environment:

The influence of environment mainly refers to the pumped gas system of pollution in the disposal process of molten steel, molten steel will emit a lot of gas, together will be part of the subtle oxidation of small particles are inhaled Fenpi vacuum pump, these small particles will accumulate adhesion on the pump body, reduces the exhaust pipe flow path

The pumping time is prolonged, and the pumping function of the pump is decreased.

After a long time of exploration of the theory, we think the function of the pump have more influences: the influence of internal leakage, the influence of steam pump layout.