EP0500972A1 - Rotor de turbomachine - Google Patents

Rotor de turbomachine Download PDF

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Publication number
EP0500972A1
EP0500972A1 EP91102744A EP91102744A EP0500972A1 EP 0500972 A1 EP0500972 A1 EP 0500972A1 EP 91102744 A EP91102744 A EP 91102744A EP 91102744 A EP91102744 A EP 91102744A EP 0500972 A1 EP0500972 A1 EP 0500972A1
Authority
EP
European Patent Office
Prior art keywords
cavity
cavities
shaft
heat transfer
filled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP91102744A
Other languages
German (de)
English (en)
Inventor
Joachim Dr. Krautzig
Jakob Dr. Keller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Asea Brown Boveri Ltd
ABB AB
Original Assignee
ABB Asea Brown Boveri Ltd
Asea Brown Boveri AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ABB Asea Brown Boveri Ltd, Asea Brown Boveri AB filed Critical ABB Asea Brown Boveri Ltd
Priority to EP91102744A priority Critical patent/EP0500972A1/fr
Publication of EP0500972A1 publication Critical patent/EP0500972A1/fr
Withdrawn legal-status Critical Current

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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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/08—Heating, heat-insulating or cooling means
    • F01D5/085—Heating, heat-insulating or cooling means cooling fluid circulating inside the rotor
    • F01D5/088—Heating, heat-insulating or cooling means cooling fluid circulating inside the rotor in a closed cavity

Definitions

  • the invention relates to a shaft of a turbomachine which has one or more rotationally symmetrical cavities.
  • the invention relates to a prior art, as it results for example from DE-PS 26 33 829.
  • Such cavities have a thermally insulating effect during transient heating processes and in certain cases also in stationary cases. This can result in strong differential strains that lead to premature material fatigue.
  • the object of the invention is to provide measures which reduce or even cancel the insulating effect of the said cavities.
  • this object is achieved in that the cavity or cavities are filled with a gas whose thermal conductivity is greater than that of air or that of the protective gas, and / or that internals are provided in the cavity or cavities for increasing the heat transfer.
  • internals for example radially-axially extending ribs, can also be provided on the heat-transmitting walls.
  • internals for example radially-axially extending ribs, can also be provided on the heat-transmitting walls.
  • Such a measure improves convective heat transfer on the one hand because of the larger surface area, and on the other hand the induced boundary layer flow is strengthened because the ribs suppress the deflection of the Coriolis acceleration. With these measures, the insulating effect of a cavity in the shaft of a turbomachine can be greatly weakened or even canceled.
  • the shaft of a turbomachine according to FIG. 1 consists in the example of two shaft parts 1, 2 which are connected to one another by means of welding.
  • the weld seam is labeled 3.
  • the shaft ends of the shaft parts 1 and 2 have rotationally symmetrical recesses which (after welding) form a rotationally symmetrical cavity 4.
  • the left shaft part 1 carries the turbine rotor blades 5, the right shaft part 2 carries the compressor blades 6.
  • the turbine-side end wall 7 (hot side) of the cavity 4 is transient Heating processes and in certain cases also in the operating state a higher temperature than the compressor-side end wall 8 (cold side) of the cavity 4.
  • the cavity 4 By filling the cavity 4 according to the invention with a gas with large molecules, preferably sulfur hexafluoride, this effect can now be significantly enhanced.
  • the cavity 4 can also be pressurized in order to achieve a further increase in the heat transfer.
  • gases mentioned vapors can also be used, which condense on the cold side 8 of the cavity 4.
  • a further increase in the heat transfer can be achieved if 4 internals in the form of radially extending ribs 11 projecting axially into the cavity 4 are provided on the end walls of the cavity.
  • these increase the heat-transferring surface for the convective heat transfer, on the other hand they strengthen the boundary layer flow in the cavity because the ribs 11 suppress the deflection effect of the Coriolis acceleration. This measure can be taken alone or in combination with a special gas or steam filling.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP91102744A 1991-02-25 1991-02-25 Rotor de turbomachine Withdrawn EP0500972A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP91102744A EP0500972A1 (fr) 1991-02-25 1991-02-25 Rotor de turbomachine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91102744A EP0500972A1 (fr) 1991-02-25 1991-02-25 Rotor de turbomachine

Publications (1)

Publication Number Publication Date
EP0500972A1 true EP0500972A1 (fr) 1992-09-02

Family

ID=8206445

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91102744A Withdrawn EP0500972A1 (fr) 1991-02-25 1991-02-25 Rotor de turbomachine

Country Status (1)

Country Link
EP (1) EP0500972A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1785587A1 (fr) * 2005-11-11 2007-05-16 Siemens Aktiengesellschaft Rotor de turbomachine à refroidissement interne
EP2045442A1 (fr) * 2007-10-02 2009-04-08 Siemens Aktiengesellschaft Agencement doté d'une source de chaleur, d'un dissipateur thermique et d'un arbre rotatif

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE849327C (de) * 1946-09-24 1952-09-15 Brown Ag Kuehlung von Kreiselradlaeufern
CH322772A (de) * 1954-10-05 1957-06-30 Bbc Brown Boveri & Cie Gekühlter Gasturbinenläufer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE849327C (de) * 1946-09-24 1952-09-15 Brown Ag Kuehlung von Kreiselradlaeufern
CH322772A (de) * 1954-10-05 1957-06-30 Bbc Brown Boveri & Cie Gekühlter Gasturbinenläufer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 8, no. 90 (M-292)(1527) 25 April 1984,:& JP-A-59 005 814 (HITACHI) 12 Januar 1984, *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1785587A1 (fr) * 2005-11-11 2007-05-16 Siemens Aktiengesellschaft Rotor de turbomachine à refroidissement interne
EP2045442A1 (fr) * 2007-10-02 2009-04-08 Siemens Aktiengesellschaft Agencement doté d'une source de chaleur, d'un dissipateur thermique et d'un arbre rotatif

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