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Dehumidifying device for hollow stationary blade of steam turbine through heating and blowing

A hollow vane, dehumidification device technology, applied in mechanical equipment, engine components, machines/engines, etc., to achieve the effect of reducing water erosion, simple structure, and easy to implement

Inactive Publication Date: 2010-07-07
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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At present, there are no documents and patents on the hollow vane heating, purging and dehumidification device

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  • Dehumidifying device for hollow stationary blade of steam turbine through heating and blowing
  • Dehumidifying device for hollow stationary blade of steam turbine through heating and blowing
  • Dehumidifying device for hollow stationary blade of steam turbine through heating and blowing

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Embodiment Construction

[0016] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0017] refer to figure 1 , a steam turbine hollow vane internal heating and purging dehumidification device, the hot air used for heating and purging is completed by an air pump 1, an electric heater 2, a small plenum chamber 5 and some regulating valves 6 and 7, and the air The pump continuously sends air into the heater, and the heater heats the air to a certain temperature. A small plenum is used to stabilize the pressure and adjust the hot air to the required temperature 3; the hot air pressure 4 is adjusted as needed.

[0018] refer to figure 2 , the hollow vane includes machining the vane 1 of the wet steam stage of the steam turbine into a hollow chamber 2, and there is a purge slit 3 on the inner arc or back arc or the steam outlet side of the vane, and the purge slit 3 is connected with the hollow chamber of the vane 2 communicate with each other, a steam ...

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Abstract

The invention discloses a dehumidifying device for a hollow stationary blade of a steam turbine through heating and blowing. A stationary blade at a moist steam stage of the steam turbine is processed into a hollow blade; a proper position on back arc or inner arc of the hollow stationary blade or an outlet of the stationary blade is provided with a blowing slit; a flow of high-pressure high-temperature steam from a high-pressure section of the steam turbine is introduced into the hollow stationary blade through a valve and a steam inlet pipe; the high-pressure high-temperature steam removes the water film flowing on the surface of the stationary blade under the double action of heating and blowing of the slit so as to reduce the number, diameter size and distribution of secondary water drops at the outlet of the stationary blade. The dehumidifying device of the invention can effectively prevent or relieve water erosion of a movable blade so as to improve the safe running performance of the steam turbine, and has a simple structure and good dehumidification effect.

Description

technical field [0001] The invention belongs to the technical field of power engineering and relates to a device for heating, purging and dehumidifying inside a hollow vane of a steam turbine. Background technique [0002] The water erosion of moving blades of high-power thermal power steam turbines, nuclear power steam turbines and nuclear power ship steam turbines is very serious. Effectively removing water in steam turbines and preventing or reducing water erosion of moving blades is one of the key technologies to ensure safe and reliable operation of steam turbines. [0003] Process the stator blades of the wet steam stage of the steam turbine into hollow blades, and open gaps at the appropriate positions of the inner arc and the back arc of the stator blades. A small amount of high-pressure and high-temperature steam is introduced into the hollow vane. On the one hand, the high-pressure and high-temperature steam heats the flowing water film on the surface of the vane,...

Claims

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Application Information

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IPC IPC(8): F01D9/02
Inventor 王新军高铁瑜苏鹏飞牛力军
Owner XI AN JIAOTONG UNIV
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