What are the meanings and differences between power turbine and gas turbine in gas turbines?
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What are the meanings and differences between power turbine and gas turbine in gas turbines? From the structural diagram, it seems that they are together. Why are their rotational speeds different?
What is "looks like they are together from the structural diagram"? ? If it is on the same shaft, the speed must be the same. If the speed is different, it must not be on the same shaft. Is there another large gear?
If the speeds are different, it must be biaxial. The gas turbine is coaxial with the compressor and drives the compressor.； The power turbine is coaxial with the other equipment it drives ； Both gas turbines and power turbines are driven by high-temperature gas.
Conceptually speaking, a power turbine is a turbine that provides power, and a gas turbine is a turbine that uses gas as the driving medium. They may be the same turbine, or they may be different. If you say that you have these two in the same unit and the speeds are different, it would be best to send the structure diagram for everyone to take a look at.
The power turbine has two functions (based on the actual situation of our company): 1. The initial speed is provided when the unit is started, just like the starter motor when starting a car. After the gas turbine reaches the ignition speed driven by the power turbine, the gas turbine ignites successfully and the gas turbine starts to do work. At this time, the power turbine is disconnected from the gas turbine through the clutch. ； 2. When the temperature is high in summer and the system load is high, the load of the gas turbine unit also increases. At this time, the power turbine is required for afterburner operation. According to the normal operating procedures of the steam turbine, the power turbine starts and gradually increases the speed. It first meshes with one end of the clutch, and the power turbine continues to increase the speed. After the power turbine speed is consistent with the gas turbine speed, the power turbine is fully meshed with the gas turbine. At this time, the afterburning operation begins. ； In other words, the power turbine and the gas turbine together provide power to the compressor! The equipment configuration of our company's air compressor unit is as follows for your reference: Power turbine (starting turbine) German KKK + clutch British SSS + gas turbine GE company Italian New Billund + air compressor Hitachi company This post was last edited by sdygrsj3129 on 2009-4-28 10:34 ]
Gas turbine device composition: Starting turbine (i.e. power turbine), clutch, transmission gearbox, gas turbine, combustion chamber, compressor. The starting turbine is first driven by steam. Through the clutch and variable speed gearbox, the gas turbine is driven, and the compressor rotates. When the compressor air pressure reaches the ignition pressure, it is mixed with gas and ignited. The gas drives the gas turbine to rotate until it can drive the compressor. At this time, the starting turbine clutch is disengaged, the starting turbine stops, and the gas turbine drives the compressor to run to the rated speed. The device operates normally.