摘要
This paper describes the development of a new sealing concept primarily targeted at steam turbines from concept development to testing in a rotating rig. The seal concept is a development of the spring back gland segment and features a pressurized pocket connected to the upstream face of the sealing segment. By a careful arrangement of the key dimensions of the seal segment a seal is produced that responds to rotor movement that it has a dynamic clearance that responds to rotor movement. This reduces the risk of contact between the rotating and stationary parts in a turbine and allows a lower clearance to be achieved reducing leakage losses. The seal was developed with steam turbine application as the design intent but the dynamic seal idea is a generic one and can be applied to other fields.
This paper describes the development of a new sealing concept primarily targeted at steam turbines from concept development to testing in a rotating rig. The seal concept is a development of the spring back gland segment and features a pressurized pocket connected to the upstream face of the sealing segment. By a careful arrangement of the key dimensions of the seal segment a seal is produced that responds to rotor movement that it has a dynamic clearance that responds to rotor movement. This reduces the risk of contact between the rotating and stationary parts in a turbine and allows a lower clearance to be achieved reducing leakage losses. The seal was developed with steam turbine application as the design intent but the dynamic seal idea is a generic one and can be applied to other fields.
出处
《风机技术》
2018年第4期31-36,共6页
Chinese Journal of Turbomachinery
基金
supported by the Engineering and Physical Sciences Research Council [grant number EP/K02115X/1]
GE Power
关键词
汽轮机
密封性
技术创新
发展现状
Tubomachinery
Steam Turbine
Sealing
Dynamic Clearance
Labyrinth
Leakage
