Steam turbine

Steam turbine

  • CN 101,300,405 B
  • Filed: 10/24/2006
  • Issued: 05/29/2013
  • Est. Priority Date: 10/31/2005
  • Status: Active Grant
First Claim
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1. the steam turbine (1) that has housing (2,3),Wherein have thrust balancing piston (4) turbine shaft (5) swivel bearing be arranged in the inside of described housing (2,3) and along spin axis (6) orientation,Wherein between described housing (2,3) and turbine shaft (5), form flow channel (9),Wherein said turbine shaft (5) within it section has for the cooling pipe (17) along the direction delivery cooled vapor of described spin axis (6), and described cooling pipe (17) is connected with at least one flow ipe (16) on the one hand, be used for making cooling steam flow into described cooling pipe (17) from described flow channel (9), whereinDescribed cooling pipe (17) is connected with at least one outflow pipeline (18) on the other hand, for thrust balancing piston skirt surface (19) that cooling steam is led,It is characterized in that for will be by from flowing out the cooling steam that pipeline (18) flows out and the return conduits (21) of between described housing (2,3) and turbine shaft (5), leading back towards the mixed vapour of the mobile a part of fresh steam formation of the direction of described thrust balancing piston (4) as the equalizing piston leaked steam, wherein said return conduits (21) imports in the described flow channel (9)Wherein said turbine shaft (5) in axial direction (34) has at least two zones that are made from a variety of materials,Wherein said at least two zones that are made from a variety of materials (22,23,24) are connected to each other by means of cutting end-tooth (30,31),The wherein said end-tooth (30,31) of cutting has trapezoidal, rectangle or leg-of-mutton tooth section, and described tooth section then has the space (32) that is configured to flow ipe (16) and/or flows out pipeline (18).

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