Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
  • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
  • F01D25/08—Cooling; Heating; Heat-insulation
  • F01D25/14—Casings modified therefor
  • F01D25/145—Thermally insulated casings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
  • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
  • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
  • F01D25/243—Flange connections; Bolting arrangements
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
  • F05D2220/00—Application
  • F05D2220/30—Application in turbines
  • F05D2220/31—Application in turbines in steam turbines
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
  • F05D2260/00—Function
  • F05D2260/20—Heat transfer, e.g. cooling
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
  • F05D2260/00—Function
  • F05D2260/30—Retaining components in desired mutual position
  • F05D2260/31—Retaining bolts or nuts

Definitions

• the invention relates to a turbomachine comprising a housing comprising an upper housing part, a lower housing part and a flow channel arranged in the housing, wherein the Strö ⁇ flow channel has a Strömungskanalabdampf syndromem, wherein the housing part via screws ver ⁇ bindable to the lower housing part, wherein the screw is designed as a stud and a cooling channel formed along the axial direction of the stud, the cooling passage having a cooling passage inlet and a cooling passage outlet.
• steam turbines In steam power plants, steam turbines are used, which apply an electrical output of up to 1,600 megawatts Kings ⁇ nen. For thermodynamic reasons, a steam turbine is divided into so-called sub-turbines, which have a common shaft.
• the high-pressure turbine part comprises a réellege ⁇ housing, which consists of an upper part and a lower part and is held together by means of screw connections. Due to the high temperatures and the temporal behavior of the temperature change, time- and temperature-dependent relaxations occur. As a result, it is possible that the tension of the housing and thus the tightness during operation diminishes, which can lead to leakage and is accompanied by a loss of efficiency.
• a turbomachine umfas ⁇ send a housing of an upper housing part, a housing ⁇ lower part and, disposed in the housing flow channel, said flow channel having a Strömungskanalabdampf syndromem, wherein the upper housing part by means of screws with the Ge ⁇ koruseunterteil is connectable, said screw is designed as a pin ⁇ screw and has a trained along the axial direction of the stud screw cooling channel where ⁇ at the cooling channel has a cooling duct inlet and adekanal- outlet, wherein the cooling duct inlet is Strömungstech ⁇ nisch connected to the flow channel, thedekanalauslass aerodynamically is connected to the Strömungskanalab ⁇ steam room.
• the invention proposes to use a known cooling hole in the stud bolts used for the screw, which is supplied on the one hand with a vapor located in the flow channel and on the other hand ⁇ connected via adekanalauslass with the Strömungskanalab ⁇ steam room.
• the steam from the flow channel has a higher pressure than the steam in Strömungskanalabdampfhoffm so that a forced flow through the cooling channel in the stud has resulted, resulting in a kuh ⁇ ment of the screw as a whole.
• the stud bolt comprises a nut, wherein the nut comprises cooling channel slots, which fluidly connects the cooling passage with the flow channel evaporation chamber.
• the lower housing part has a bore which connects the cooling channel inlet with the Strö mungskanal.
• This bore can be performed in an axial direction of the upper and lower housing upper part. It is important that at a suitable location, the bore has a flow ⁇ technical connection that provides the appropriate steam for the cooling steam.
• FIG. 2 upper housing part FIG. 3 lower housing part
• FIG. 4 shows a plan view of a nut according to the invention
• Figure 5 is a schematic side view of the housing upper ⁇ part and the lower housing part.
• FIG. 1 shows a schematic view of a partial view ei Nes housing upper part 1 and a lower housing part 2.
• the Ge housing upper part 1 and the lower housing part 2 together a housing which is used in a turbomachine, not shown.
• a flow channel is angeord ⁇ net (not shown).
• blades and vanes are arranged, which convert the thermal energy Ener ⁇ a vapor into rotational energy of a rotor.
• the upper housing part 1 and the lower housing part 2 are connected to one another via screws 3.
• the screw 3 is designed as a stud, which means that the screw has by no 3 nen screw head, but a Ge ⁇ threaded at both ends.
• a cooling channel 4 is formed, which is connected to a cooling channel inlet 5 and a cooling channel outlet 6 on the one hand.
• a steam flowing in the cooling channel inlet 5 will flow through the cooling channel 4 in the axial direction through the stud bolt and thereby cool the stud.
• the cooling steam enters the cooling channel outlet 6.
• a slot 8 is arranged in the nut 7, through which the steam can flow into the cooling channel outlet 6.
• Thedekanalauslass 6 is fluidly connected via a first fluid ⁇ technical connection 9 with the Strömungskanalabdampf syndromem (not shown in detail).
• Thedekanalauslass 6 is fluidically connected via a between the stud and the housing, in particular hous ⁇ seoberteil 1 arranged screw cooling channel 14 with the flow channel evacuation chamber.
• the channel inlet is connected to the flow channel via a second fluidic connection 10, expediently a fluidic connection after a blade stage is realized, in which the steam parameters are ideal for adeka ⁇ nalnikank.
• FIG. 3 shows the housing lower part 2 with the second fluidic connection 10 and the cooling channel inlet 5.
• FIG. 4 shows the nut 7 of the screw 3.
• the nut 7 has at least one slot 8 in the region of the thread 11, through which the cooling steam can flow.
• FIG. 5 shows a side view in the axial direction 12 of the turbomachine. The arrangement of the flow channel 13 as well as the cooling channel inlet 5 and the cooling channel outlet 6 and the first fluidic connection 9 and the second fluidic connection 10 can be seen in FIG.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Turbine Rotor Nozzle Sealing (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=48045422

Family Applications (1)

Country Status (6)

Families Citing this family (5)

Citations (4)

Family Cites Families (8)

• 2012
  • 2012-03-27 EP EP12161469.7A patent/EP2644843A1/de not_active Withdrawn
• 2013
  • 2013-03-18 EP EP13713767.5A patent/EP2802748B1/de not_active Not-in-force
  • 2013-03-18 JP JP2015502200A patent/JP5883986B2/ja not_active Expired - Fee Related
  • 2013-03-18 IN IN7089DEN2014 patent/IN2014DN07089A/en unknown
  • 2013-03-18 WO PCT/EP2013/055506 patent/WO2013143894A1/de active Application Filing
  • 2013-03-18 CN CN201380017521.1A patent/CN104395562B/zh not_active Expired - Fee Related
  • 2013-03-18 US US14/386,795 patent/US20150050132A1/en not_active Abandoned

Patent Citations (4)

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