US3304056A - Turbine blades - Google Patents

Turbine blades Download PDF

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Publication number
US3304056A
US3304056A US50811665A US3304056A US 3304056 A US3304056 A US 3304056A US 50811665 A US50811665 A US 50811665A US 3304056 A US3304056 A US 3304056A
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turbine
turbine blades
plate
water drops
blades
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Sohma Akio
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Hitachi Ltd
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Hitachi Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12Blades
    • F01D5/28Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/32Collecting of condensation water; Drainage Removing solid particles

Description

Feb. 14, 1967 AKIO SOHMA 3,304,056

TURBINE BLADES Filed Nov. 16. 1965 INVENTOR 4/00 309/14 ATTORNEY United States Patent 3,304,056 TURBINE BLADES Akio Sohma, Hitachi-shi, Japan, assignor to Hitachi, Ltd., Tokyo, Japan, a corporation of Japan Filed Nov. 16, 1965, Ser. No. 508,116 Claims priority, application Japan, Mar. 19, 1965, ill/15,659 6 Claims. (Cl. 253-76) The present invention relates to turbine blades and more particularly to turbine blades which are operable at the low pressure stage of a turbine or in the wet steam region of a turbine for the nuclear reactors and for the generation of subterranean heat.

In the turbine blades operable in the aforesaid wet steam region of turbines it has been more effective to eliminate water drops contained in the wet steam in order to raise the efiiciency of the turbine blades and to prevent erosion of parts inside the turbine, particularly of the tips of turbine blades running with great peripheral speed, and thereby to prolong the life of the blades. A variety of methods has heretofore been contemplated in order to remove said water drops to avoid the erosion of the blades. However, the object was not attained due to difiiculties that the moisture in the steam and the revolution of the blades urged the speed of water drops to collide with the surfaces of the blades as the moisture gradually increased and the revolution was accelerated.

One example of the construction of turbine blades which have been adopted conventionally for the separating of the water drops adhering on the turbine blades comprised the provision of a plurality of separation grooves cut on a turbine blade for guiding and discharging the water drops into the peripheral chamber around the turbine blade. The construction of the turbine blade of this type was well adapted for guiding the water drops to the tips of the blades and to discharge and separate them from the surfaces of the blades but it has accompanied dangers to deform the grooves by erosion caused from the effect of the water drops, with the result that the separation of the water drops was not accomplished satisfactorily and the safety of the turbines was greatly injured.

Another attempt to avoid the erosion of the turbine blades was to apply a stellite plate on a part of blade which is mostly exposed to the water drops. Such stellite plate was surely capable of reducing the erosion of the surfaces of the turbine blades on account of high resistivity of the stellite material against erosion but could not effectively achieve the separation and removal of the water drops from the turbine blades.

Thus it has become very important to prevent the erosion of the turbine blades for operating in the wet steam region, and with this in view it is now proposed to provide a means for discharging the water drops from the turbine blades as promptly as possible so that the erosion may not take place on the turbine blades due to water drops and for increasing the safety of the turbine blades endurable to operate for many hours.

The construction of the turbine blades as proposed according to this invention will more clearly be apparent from the following description when read in conjunction with the accompanying drawing, in which:

FIGURE 1 is a perspective view of the stellite plate provided with grooves according to this invention;

FIGURE 2 is a plan view of the turbine blade provided with the stellite plate having the grooves as shown in FIGURE 1;

FIGURE 3 is a front view of the stellite plate having the grooves as shown in FIGURE 1;

FIGURE 4 is a perspective view of the turbine blades ice I stellite plate 1 on the surface of a turbine blade 2 in a predetermined region where the water drops mostly collide. The stellite plate 1 as shown in FIG. 1, is provided with guide grooves to allow the separation of water drops to continue at all times. In the region 4 at the tip of the turbine blade against which the water drops mostly strike there is provided a recess 6 to receive the stellite plate 1 as shown in FIGS. 2 and 3. The stellite plate 1 is adapted to fit into the recess 6 and fixed by soldering in the manner that no troubles will occur and hamper the operation of the turbine. The guide grooves 3 for separating the water drops are shaped so as to make the Water drops separate toward the direction of the tips of the turbine blades.

FIG. 4 shows an embodiment of the turbine blades thus assembled in an entirety.

According to the same embodiment shown by FIG. 5, it may well be appreciated that the water drops coming into contact with or striking against the turbine blade gather into the grooves on the turbine blade and flow along the grooves by centrifugal force of the turbine blades. Thereafter such water drops are led to the tips of the turbine blades and discharged therefrom into the peripheral chamber 7 and removed out of the turbine casing.

For maintaining the separation of water drops as desired and the resistivity of the stellite plate against erosion the present invention has employed a stellite plate of Co'Cr-W alloy material. Such stellite plate, however, can be substituted for other erosion resistant alloy material to serve the same purpose, therefore the application of material may not be restricted only to the aforesaid alloy metal if it does not depart from the spirit and scope of the present invention and the claims.

It should be noted further that a plate of the same material as the turbine blade can likewise be employed instead of a stellite plate and is fitted into the recess in the same manner as described above. In other cases such plate can be replaced with other similar plate by simply removing the soldering after it has been heavily eroded. The stellite plate also can be replaced with other stellite plate by removing the soldering.

By the use of the turbine blades of the present invention having a construction as described above, not only is it possible to prevent erosion or deformation of the turbine blades even during operation for a prolonged period, but it is also possible to operate the turbine blales without reduction in water drop separating efficiency.

What I claim is:

1. A turbine blade including an erosion resistant alloy plate having a plurality of generally parallel grooves and being rigidly attached by fusion to the upstream end radially outward portion of the turbine blade so that the grooves extend in the radial direction of the turbine blade.

2. The turbine blade of claim 1, wherein said plate is constructed of a stellite cobalt-chromium-tungsten alloy.

3. An elastic fluid turbine, comprising: a rotor having a plurality of generally radially extending contoured turbine blades; each of said blades having an elongated recess extending generally radially along the back of said "blade; a plate of relatively high erosion resistant material having the general shape of said recess and being rigidly attached within in each of said recesses; said 3 plate having a plurality of closely spaced, generally parallel grooves on its back face extending generally in the radial direction; a relatively stationary turbine casing surrounding said rotor and having means for collecting and removing condensation that has been collected in said grooves; moved radially outward by centrifugal force along said grooves, and discharged radially from said grooves.

4. The fluid turbine according to claim 3, wherein each of said recesses open in the upstream and radial outward directions, each of said recesses extend from the tip of said blade along the major radial dimension of said blade to a point substantially spaced from the root of said blade and from the upstream edge of said blade for only a minor portion of the axial dimension of said blade, said grooves extend for the full radial dimension of each of said plates, and said plate completely fills said recess.

5. The turbine according to claim 4, wherein said plate is constructed of a cobalt-tungsten-chromium stellite alloy.

6. The turbine according to claim 3, wherein said plate is constructed of a cobalt-tungsten-chromium stellite alloy.

References Cited by the Examiner UNITED STATES PATENTS 1,829,674 10/ 1931 Rosenlocher 25376 1,862,827 6/1932 Parsons et al. 25377 3,215,511 11/1965 Chisholm et al.

FOREIGN PATENTS 360,230 11/ 1931 Great Britain. 619,722 3/ 1949 Great Britain OTHER REFERENCES Knowlton, abstract of application Serial No. 133,199, published June 5, 1951.

m MARTIN P, SCHWADRON, Primary Examiner.

EVERETTE A. POWELL, JR., Examiner.

Claims (1)

1. A TURBINE BLADE INCLUDING AN EROSION RESISTANT ALLOY PLATE HAVING A PLURALITY OF GENERALLY PARALLEL GROOVES AND BEING RIGIDLY ATTACHED BY FUSION TO THE UPSTREAM END RADIALLY OUTWARD PORTION OF THE TURBINE BLADE SO THAT THE GROOVES EXTEND IN THE RADIAL DIRECTION OF THE TURBINE BLADE.
US50811665 1965-03-19 1965-11-16 Turbine blades Expired - Lifetime US3304056A (en)

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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3576377A (en) * 1967-12-22 1971-04-27 Rolls Royce Blades for fluid flow machines
US3837761A (en) * 1971-08-20 1974-09-24 Westinghouse Electric Corp Guide vanes for supersonic turbine blades
US3973870A (en) * 1974-11-04 1976-08-10 Westinghouse Electric Corporation Internal moisture removal scheme for low pressure axial flow steam turbine
US4512719A (en) * 1981-07-24 1985-04-23 Motoren-Un Turbinen-Union Munchen Gmbh Hot gas wetted turbine blade
US4720239A (en) * 1982-10-22 1988-01-19 Owczarek Jerzy A Stator blades of turbomachines
EP0379922A1 (en) * 1989-01-24 1990-08-01 Refurbished Turbine Components Limited Turbine blade repair
US5261785A (en) * 1992-08-04 1993-11-16 General Electric Company Rotor blade cover adapted to facilitate moisture removal
US5573370A (en) * 1995-03-20 1996-11-12 Westinghouse Electric Corporation Steam turbine
DE19546008A1 (en) * 1995-12-09 1997-06-12 Abb Patent Gmbh Turbine blade, which is designed for use in wet vapor of Vorend- and output stages of turbines
US6213711B1 (en) * 1997-04-01 2001-04-10 Siemens Aktiengesellschaft Steam turbine and blade or vane for a steam turbine
US6474942B2 (en) * 2000-01-03 2002-11-05 General Electric Company Airfoil configured for moisture removal from steam turbine flow path
WO2003104615A1 (en) * 2002-06-10 2003-12-18 Siemens Aktiengesellschaft Workpiece with erosion-reducing surface structure
US6705554B1 (en) * 1999-06-09 2004-03-16 Voith Sulzer Papiertechnik Patent Gmbh Rotor for a paper stock processing machine, anti-wear element for such a rotor, and paper stock processing apparatus
US20050163621A1 (en) * 2003-12-20 2005-07-28 Gulfstream Aerospace Corporation Mitigation of unsteady peak fan blade and disc stresses in turbofan engines through the use of flow control devices to stabilize boundary layer characteristics
EP1580399A1 (en) * 2004-03-25 2005-09-28 Rolls-Royce Deutschland Ltd & Co KG Compressor for an aircraft engine.
US20050271513A1 (en) * 2004-06-02 2005-12-08 Erik Johann Compressor blade with reduced aerodynamic blade excitation
US20060263223A1 (en) * 2005-05-18 2006-11-23 Hartzell Fan, Inc. Fan blade with ridges
US20060269401A1 (en) * 2005-05-31 2006-11-30 General Electric Company Moisture removal grooves on steam turbine buckets and covers and methods of manufacture
US20080219852A1 (en) * 2007-02-02 2008-09-11 Volker Guemmer Fluid-flow machine and rotor blade thereof
US20110110784A1 (en) * 2009-11-12 2011-05-12 General Electric Company Turbine blade and rotor
US20110110772A1 (en) * 2009-11-11 2011-05-12 Arrell Douglas J Turbine Engine Components with Near Surface Cooling Channels and Methods of Making the Same
CN102168583A (en) * 2011-04-22 2011-08-31 上海哈能环保节能工程有限公司 Steam turbine special for saturated steam
US20120099967A1 (en) * 2009-07-14 2012-04-26 Kabushiki Kaisha Toshiba Steam turbine
EP2458148A1 (en) * 2010-11-25 2012-05-30 Siemens Aktiengesellschaft Turbo-machine component with a surface for cooling
US20130189077A1 (en) * 2012-01-19 2013-07-25 Kabushiki Kaisha Toshiba Steam turbine and blade for steam turbine
WO2014025729A1 (en) * 2012-08-07 2014-02-13 General Electric Company Last stage turbine blade including a plurality of leading edge indentations, corresponding rotor assembly and steam turbine
DE102014215082A1 (en) * 2014-07-31 2016-02-04 Siemens Aktiengesellschaft Blade for a steam turbine
JP2016138524A (en) * 2015-01-28 2016-08-04 三菱日立パワーシステムズ株式会社 Stationary vane and steam turbine
US20170058917A1 (en) * 2015-09-02 2017-03-02 Krista L. McKinney Single thickness blade with leading edge serrations on an axial fan

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1829674A (en) * 1928-12-08 1931-10-27 Gen Electric Elastic fluid turbine and the like
GB360230A (en) * 1929-12-04 1931-11-05 Gen Electric Improvements in and relating to methods of preventing the erosion of metallic objects
US1862827A (en) * 1930-01-22 1932-06-14 Parsons Steam turbine
GB619722A (en) * 1946-12-20 1949-03-14 English Electric Co Ltd Improvements in and relating to boundary layer control in fluid conduits
US3215511A (en) * 1962-03-30 1965-11-02 Union Carbide Corp Gas turbine nozzle vane and like articles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1829674A (en) * 1928-12-08 1931-10-27 Gen Electric Elastic fluid turbine and the like
GB360230A (en) * 1929-12-04 1931-11-05 Gen Electric Improvements in and relating to methods of preventing the erosion of metallic objects
US1862827A (en) * 1930-01-22 1932-06-14 Parsons Steam turbine
GB619722A (en) * 1946-12-20 1949-03-14 English Electric Co Ltd Improvements in and relating to boundary layer control in fluid conduits
US3215511A (en) * 1962-03-30 1965-11-02 Union Carbide Corp Gas turbine nozzle vane and like articles

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3576377A (en) * 1967-12-22 1971-04-27 Rolls Royce Blades for fluid flow machines
US3837761A (en) * 1971-08-20 1974-09-24 Westinghouse Electric Corp Guide vanes for supersonic turbine blades
US3973870A (en) * 1974-11-04 1976-08-10 Westinghouse Electric Corporation Internal moisture removal scheme for low pressure axial flow steam turbine
US4512719A (en) * 1981-07-24 1985-04-23 Motoren-Un Turbinen-Union Munchen Gmbh Hot gas wetted turbine blade
US4720239A (en) * 1982-10-22 1988-01-19 Owczarek Jerzy A Stator blades of turbomachines
EP0379922A1 (en) * 1989-01-24 1990-08-01 Refurbished Turbine Components Limited Turbine blade repair
US5261785A (en) * 1992-08-04 1993-11-16 General Electric Company Rotor blade cover adapted to facilitate moisture removal
US5984628A (en) * 1995-03-20 1999-11-16 Siemens Westinghouse Power Corporation Steam turbine
US5573370A (en) * 1995-03-20 1996-11-12 Westinghouse Electric Corporation Steam turbine
DE19546008A1 (en) * 1995-12-09 1997-06-12 Abb Patent Gmbh Turbine blade, which is designed for use in wet vapor of Vorend- and output stages of turbines
US6213711B1 (en) * 1997-04-01 2001-04-10 Siemens Aktiengesellschaft Steam turbine and blade or vane for a steam turbine
US6705554B1 (en) * 1999-06-09 2004-03-16 Voith Sulzer Papiertechnik Patent Gmbh Rotor for a paper stock processing machine, anti-wear element for such a rotor, and paper stock processing apparatus
US6474942B2 (en) * 2000-01-03 2002-11-05 General Electric Company Airfoil configured for moisture removal from steam turbine flow path
WO2003104615A1 (en) * 2002-06-10 2003-12-18 Siemens Aktiengesellschaft Workpiece with erosion-reducing surface structure
US20050163621A1 (en) * 2003-12-20 2005-07-28 Gulfstream Aerospace Corporation Mitigation of unsteady peak fan blade and disc stresses in turbofan engines through the use of flow control devices to stabilize boundary layer characteristics
US7878759B2 (en) 2003-12-20 2011-02-01 Rolls-Royce Deutschland Ltd & Co Kg Mitigation of unsteady peak fan blade and disc stresses in turbofan engines through the use of flow control devices to stabilize boundary layer characteristics
US20050214113A1 (en) * 2004-03-25 2005-09-29 Erik Johann Compressor for an aircraft engine
US7207772B2 (en) 2004-03-25 2007-04-24 Rolls-Royce Deutschland Ltd & Co Kg Compressor for an aircraft engine
EP1580399A1 (en) * 2004-03-25 2005-09-28 Rolls-Royce Deutschland Ltd & Co KG Compressor for an aircraft engine.
US20050271513A1 (en) * 2004-06-02 2005-12-08 Erik Johann Compressor blade with reduced aerodynamic blade excitation
US7484937B2 (en) 2004-06-02 2009-02-03 Rolls-Royce Deutschland Ltd & Co Kg Compressor blade with reduced aerodynamic blade excitation
US20060263223A1 (en) * 2005-05-18 2006-11-23 Hartzell Fan, Inc. Fan blade with ridges
US7494325B2 (en) * 2005-05-18 2009-02-24 Hartzell Fan, Inc. Fan blade with ridges
US20060269401A1 (en) * 2005-05-31 2006-11-30 General Electric Company Moisture removal grooves on steam turbine buckets and covers and methods of manufacture
US7318699B2 (en) * 2005-05-31 2008-01-15 General Electric Company Moisture removal grooves on steam turbine buckets and covers and methods of manufacture
US8118555B2 (en) * 2007-02-02 2012-02-21 Rolls-Royce Deutschland Ltd & Co Kg Fluid-flow machine and rotor blade thereof
US20080219852A1 (en) * 2007-02-02 2008-09-11 Volker Guemmer Fluid-flow machine and rotor blade thereof
US20120099967A1 (en) * 2009-07-14 2012-04-26 Kabushiki Kaisha Toshiba Steam turbine
US8419354B2 (en) * 2009-07-14 2013-04-16 Kabushiki Kaisha Toshiba Steam turbine
US20110110772A1 (en) * 2009-11-11 2011-05-12 Arrell Douglas J Turbine Engine Components with Near Surface Cooling Channels and Methods of Making the Same
US20110110784A1 (en) * 2009-11-12 2011-05-12 General Electric Company Turbine blade and rotor
US8277189B2 (en) * 2009-11-12 2012-10-02 General Electric Company Turbine blade and rotor
JP2011106449A (en) * 2009-11-12 2011-06-02 General Electric Co <Ge> Turbine rotating blade and rotor
EP2458148A1 (en) * 2010-11-25 2012-05-30 Siemens Aktiengesellschaft Turbo-machine component with a surface for cooling
WO2012069273A1 (en) * 2010-11-25 2012-05-31 Siemens Aktiengesellschaft Turbine nozzle segment and corresponding gas turbine engine
CN102168583A (en) * 2011-04-22 2011-08-31 上海哈能环保节能工程有限公司 Steam turbine special for saturated steam
CN102168583B (en) * 2011-04-22 2014-03-26 上海哈能环保节能工程有限公司 Steam turbine special for saturated steam
US20130189077A1 (en) * 2012-01-19 2013-07-25 Kabushiki Kaisha Toshiba Steam turbine and blade for steam turbine
JP2015525854A (en) * 2012-08-07 2015-09-07 ゼネラル・エレクトリック・カンパニイ Last stage turbine blade including multiple leading edge recesses, and corresponding rotor assembly and steam turbine
WO2014025729A1 (en) * 2012-08-07 2014-02-13 General Electric Company Last stage turbine blade including a plurality of leading edge indentations, corresponding rotor assembly and steam turbine
DE102014215082A1 (en) * 2014-07-31 2016-02-04 Siemens Aktiengesellschaft Blade for a steam turbine
EP2985420A1 (en) * 2014-07-31 2016-02-17 Siemens Aktiengesellschaft Rotor blade for a steam turbine
JP2016138524A (en) * 2015-01-28 2016-08-04 三菱日立パワーシステムズ株式会社 Stationary vane and steam turbine
US20170058917A1 (en) * 2015-09-02 2017-03-02 Krista L. McKinney Single thickness blade with leading edge serrations on an axial fan

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