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Should the air supply pressure for the turbine shaft seal be higher than atmospheric pressure?

2020-06-29View Original

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I’ve always been confused: why is our shaft seal pressure always between 0.93 and 0.05 MPa, when atmospheric pressure is 0.1 MPa? Why can it be sealed?
Reply #22020-06-30
Could you be more specific? I’m a beginner when it comes to steam engines, and I’m not quite understanding it
Reply #32020-06-30
Compared to the atmosphere, it is 0.93; the atmosphere is taken as zero.
Reply #42020-07-02
Gauge pressure is equal to absolute pressure minus atmospheric pressure, got it? Gauge pressure is the difference between the absolute pressure inside the steam seal and atmospheric pressure; as long as this value is greater than zero, air cannot get in

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