What is the effect of too high or too low pressure in the steam turbine equalizing tank? How to adjust?

If the pressure is too high, the heat source will be wasted, and if the pressure is too low, the sealing effect will be poor.

It can be adjusted by pumping to the equalizing box valve and the deaerator gas balance main pipe to the equalizing box valve.

During normal operation, first of all, when the steam leakage of the unit is greater than the steam consumption of the rear gland, it will be automatically discharged to the condenser to reduce environmental emissions. When the steam leakage of another unit is less than that of the rear gland, the second pump or the lower pump will supply steam to the equalizing box through it to ensure the steam supply of the rear gland.

Extended data:

After passing through the fixed nozzle, the high-temperature and high-pressure steam becomes an accelerated airflow, and then it is sprayed on the blades, so that the rotor equipped with blade rows rotates and does work to the outside.

The low-pressure rotor of steam turbine has a large mass and bears a large centrifugal force. When the sleeve rotor is used, the inner hole of the impeller will undergo large elastic deformation during operation, so it is necessary to design a large assembly interference, but this will cause large assembly stress. If the whole forged rotor is used, the quality is difficult to guarantee, so the welded rotor combined with segmented forging and welding is used.

It is mainly formed by splicing and welding a plurality of impellers and an end shaft. The welded rotor has light weight, small forgings, compact structure and high bearing capacity. Compared with the integral forged rotor with the same size and central hole, the welded rotor has high strength, good rigidity and light weight, but it requires high welding performance. The application of this kind of rotor is limited by welding technology, inspection method and material type.

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