Emergency circuit breaker
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What are the consequences of not having a critical shutdown device installed on a steam turbine?
So how is shutdown protection achieved in case of mechanical overspeed or excessive rotor shaft displacement? Relying on electronic interlocking?
When a fault occurs during the operation of the turbine, the emergency shut-off device releases the oil used for slow-speed closing of the automatic main steam valve, causing the valve to close and thereby stopping the steam from reaching the turbine, thus preventing the accident from escalating
Generally, mechanical overspeed protection and electronic overspeed protection are used nowadays, but there are also systems that rely solely on electronic overspeed protection; in such cases, there is no emergency cut-off device. The security measures are just a bit weak. After all, electronic speed control is quite safe and reliable at present.
What to do if the engine speeds up too much...............
It is used for rapid shutdown oil pressure relief; it is a very commonly used safety device. Is there any other alternative?
Reliability of electronic overspeed protection and mechanical overspeed protection. It seems that electronics have higher reliability. The key is to have a higher level of expertise in the maintenance, calibration, and technology related to thermal instruments.
Speeding is very dangerous, but you can also try adding a speed interlock.
Reply to 1# LittleThumbwww: This one should be a 1-to-2 model, right? Models of type 1-to-2 don’t require emergency cut-off switches; an electronic interlock is sufficient, so this one can be omitted! ! 1
Mechanical devices are on the decline; electronics are the mainstream.