There are two types of steam turbines in power plants,i.e.impulse type and reaction type.The majority of small and medium-sized steam turbines use impulse type because of their complex steam extraction function,while reaction type steam turbines occupy almost all the large capacity power markets with their advantages of high efficiency,high reliability,etc.The combination of thrust and thrust is a new concept proposed in recent years,which aims to meet the steam extraction needs of the unit while ensuring high efficiency.This can lead to problems such as excessive axial thrust of the unit and large peak valley thrust deviation under variable operating conditions,making it difficult to design the turbine thrust balance system.A new optimization mode for the thrust balance system is proposed by optimizing the structure of the balance drum in the steam seal system,as well as the flow passage in the impulse section of the impulse and reverse combination.This provides guidance and assistance for the future design of power plant steam turbines.
thrust balance systemreverse combinationdegree of reactionbalance drum
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