Traditional Culture Encyclopedia - The 24 Solar Terms - What is the harm of low inlet pressure of steam turbine? How to understand the automatic adjustment of regulating steam valve
What is the harm of low inlet pressure of steam turbine? How to understand the automatic adjustment of regulating steam valve
The adjustment of steam turbine is mainly to adjust the speed of steam turbine, which is realized by a speed monitoring controller. Steam turbines need to work at a constant speed to ensure safe operation and prevent vibration or surge. His principle is that during the operation of the compressor, due to the change of exhaust volume or exhaust pressure, different torques will be generated on the rotating shaft, which will be transmitted to the steam turbine through the rotating shaft, resulting in the change of rotating speed. The speed monitoring controller will feel the slight change of this speed, so as to control the opening/closing of the steam inlet valve and control or adjust the steam inlet valve accordingly. These can be realized by logic control in DCS or separate PLC. Of course, the inlet pressure of steam is also one of the factors to control the opening/closing of steam valve, in order to ensure the constant speed of steam turbine.
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