Let me ask you a question: Why does the speed fluctuation of the air separation steam turbine cause the pressure fluctuation of the supercharger?
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The standard speed of the steam turbine is 4350. Every time there is a slight fluctuation, the pressure of the supercharger will change obviously. Why? After all, the ratio of the speed of the steam turbine to the speed of the supercharger is not too high. Is it so obvious? Or are there other reasons
It depends on the level of your supercharger. For a 4350 steam turbine, your supercharger speed is generally in the tens of thousands. If the turbine speed changes slightly, the change in your supercharger speed will be amplified, and the pressure of the compressed gas will naturally change significantly.
It should be that the speed of the large gear of the supercharger is about the same as that of the steam turbine. It is mainly the speed of the small gear inside the supercharger. Although the large gear does not decrease significantly, it has a great impact on the small gear. I hope this can help you.
The speed ratio between the steam turbine and the supercharger is fixed. Changes in the driving end, that is, the speed of the steam turbine, affect the speed of the shaft that drives the impellers at all levels. When the speed changes, the characteristic curve of the compressor changes, the operating point changes, and the pressure also changes.
The pressure of the supercharger is controlled by the speed. When the turbine speed fluctuates, this fluctuation is directly transmitted to the main shaft of the supercharger through the gear coupling in the gear box, and then propagated to all stages through the gears in the supercharger body, causing the output compression power to fluctuate with the speed. Since the turbine speed is doubled in the supercharger speed range, small fluctuations in the turbine speed are amplified into large fluctuations in the supercharger.