US3202399A - Multiple-stage steam turbine - Google Patents

Multiple-stage steam turbine Download PDF

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Publication number
US3202399A
US3202399A US265571A US26557163A US3202399A US 3202399 A US3202399 A US 3202399A US 265571 A US265571 A US 265571A US 26557163 A US26557163 A US 26557163A US 3202399 A US3202399 A US 3202399A
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Prior art keywords
turbine
steam
stage
rotor
compressor
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US265571A
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English (en)
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Bar Rudolf
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Individual
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Individual
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    • 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
    • F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
    • F01D1/02—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines
    • F01D1/06—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines traversed by the working-fluid substantially radially

Definitions

  • the present invention relates to a multiple-stage steam turbine, and more particularly to a regenerative type of multiple-stage steam turbine in which a regenerating compressor is interposed between the two turbine stages.
  • the characteristic feature of the present invention resides in that the steam, which has been put to work in the first turbine stage, is utilized once more in the sec ond turbine stage formed by an additional blade rim after regenerating the steam.
  • the regeneration of the steam is accomplished by allowing the live steam to enter into the inner blade rim and by such a construction of the housing for the first turbine stage that the steam, upon entry into the first turbine stage, remains closed only for such length of time as is necessary for utilizing the steam.
  • the remaining radially outer portion of the housing of the first turbine stage remains open so that the steam is driven into the blade area of the centrifugal force utilization.
  • the steam is put under pressure by the centrifugal force resulting from the movement of the rotor so that its energy is regenerated.
  • the regenerated steam then enters the steam dome accommodating the second turbine stage whence it is utilized for work on the additional blade rim of the second stage of the steam turbine.
  • Still a further object of the present invention resides in the provision of a steam turbine in which the steam, after passage through the first turbine stage is regenerated in a particularly appropriate manner prior to admission to the second turbine stage.
  • FIGURE 1 is a transverse cross sectional view through a steam turbine in accordance with the present invent-ion
  • FIGURE 2 is an axial longitudinal cross sectional view through the steam turbine of FIGURE 1.
  • the live steam used in the first turbine stage of the multiple-stage steam turbine of the present invention is regenerated in its energy by a compressor provided with radial blades which is arranged at and rotates in unison with the turbine rotor.
  • the turbine rotor itself is a unitary structure to be referred to hereinafter as circular column.
  • the term circular column has been chosen because a column usually includes a base portion, a capital portion, and a bearer portion interconnecting the base portion with the capital portion, all of which are characteristic of the present invention when viewed in longitudinal cross section as shown in FIGURE 2.
  • the term circular column is used herein to designate the rotor structure of the present invention.
  • the use of the circular column structure makes it possible to separate different systems at one and same disklike structure from each other in such a manner that a compressor system can be placed, at the same radius as a turbine rotor, either with direct or indirect passage along the radius, below the turbine blade rim.
  • the steam turbine housing is generally designated by reference numeral 10 while the rotor structure or circular column is designated therein by reference numeral 20.
  • the rotor or circular column structure 20 includes radially inwardly thereof a base portion 21 provided with a radially inner steam turbine generally designated by reference numeral 22 and including suitably shaped conventional turbine blades 23.
  • the bearer portion 24 connects the base portion 21 with the capital portion 26 of the circular column or rotor structure 20.
  • On both sides of the bearer structure suitably shaped blades 25 are secured in any conventional manner at the bearer portion 24.
  • the capital portion 26 is provided radially outwardly thereof with a second turbine stage generally designated by reference numeral 27 and including turbine blades 28.
  • the second turbine stage 27 rotates within the dome-shaped space 19 (FIG. 1) provided in the radially outward portion of the housing 10.
  • the inlet apertures 11 are provided within the area of the first turbine stage that is closed off by the circular segment 18 suitably secured to a lateral housing part. After passing through the closed portion of the first turbine stage, the steam expands radially outwardly .within the area B opposite the closed area 18, into the regions of the radial compressor blades 25. Since the blades 25 rotate in unison with the rotor or circular column structure 20, the steam is regenerated and subsequently permitted to flow through guide channels 12 and nozzle-shaped apertures 13 into the dome-shaped space 19 for acting on the blades 28 of the second turbine stage 27.
  • the channels 12 are constituted by the triangle shape of the capital portion 26 and the out wardly flared wall portions 14 of the housing.
  • the steam is thrown outwardly by the centrifugal force out of the blade rim of the first turbine stage by the use of only a partial radially outer housing wall for the first turbine stage.
  • the steam is seized in the channel provided in the housing within the area of the bearing portion 14, is regenerated and then passes over into the dome-shaped space 19 where it acts on the further blade rim of the same rotor structure.
  • a steam turbine having an axis of rotation comprising:
  • supply means for supplying steam to said first turbine means to impartrotary movement to said rotor means in one direction, further means including said compressor means for regenerating the steam used by said first turbine means, p
  • a steam turbineaccording to claim 1, wherein said circular columns forming said rotor means includes base, bearerand capital portions, .the base portions being provided with a first blade rim-forming said first turbine means, said bearer portion being provided with blade means forming the compressor means, and the capital portion being provided with a second blade rim forming said second turbine means.
  • a steam turbine according to claim 1, wherein said further means includes wall means extending about only a portionof the circumference of said first turbine means to vpermit the steam used by said first turbine means to be drivenin the radially outward directon while passing through said compressor means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US265571A 1962-03-20 1963-01-24 Multiple-stage steam turbine Expired - Lifetime US3202399A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB0065626 1962-03-20

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US3202399A true US3202399A (en) 1965-08-24

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US265571A Expired - Lifetime US3202399A (en) 1962-03-20 1963-01-24 Multiple-stage steam turbine

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AT (1) AT251179B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4408952A (en) * 1980-04-15 1983-10-11 Friedrich Schweinfurter Lateral channel pump
US20080206047A1 (en) * 2007-02-28 2008-08-28 Snecma Turbine stage in a turbomachine
US20100047065A1 (en) * 2007-01-12 2010-02-25 Mitsubishi Heavy Industries, Ltd. Blade structure of gas turbine
US20100303604A1 (en) * 2009-05-27 2010-12-02 Dresser-Rand Company System and method to reduce acoustic signature using profiled stage design

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4408952A (en) * 1980-04-15 1983-10-11 Friedrich Schweinfurter Lateral channel pump
US20100047065A1 (en) * 2007-01-12 2010-02-25 Mitsubishi Heavy Industries, Ltd. Blade structure of gas turbine
US8317466B2 (en) * 2007-01-12 2012-11-27 Mitsubishi Heavy Industries, Ltd. Blade structure of gas turbine
US20080206047A1 (en) * 2007-02-28 2008-08-28 Snecma Turbine stage in a turbomachine
US8403636B2 (en) * 2007-02-28 2013-03-26 Snecma Turbine stage in a turbomachine
US20100303604A1 (en) * 2009-05-27 2010-12-02 Dresser-Rand Company System and method to reduce acoustic signature using profiled stage design

Also Published As

Publication number Publication date
AT251179B (de) 1966-12-27

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