CA1063330A - Method of fabricating hydraulic turbine propeller blade - Google Patents
Method of fabricating hydraulic turbine propeller bladeInfo
- Publication number
- CA1063330A CA1063330A CA255,484A CA255484A CA1063330A CA 1063330 A CA1063330 A CA 1063330A CA 255484 A CA255484 A CA 255484A CA 1063330 A CA1063330 A CA 1063330A
- Authority
- CA
- Canada
- Prior art keywords
- trunnion
- receptacle
- blade portion
- blade
- propeller
- 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.)
- Expired
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Hydraulic Turbines (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
METHOD OF FABRICATING HYDRAULIC
TURBINE PROPELLER BLADE
ABSTRACT OF THE DISCLOSURE
A method of fabricating a hydraulic turbine propeller blade is disclosed which includes welding the blade portion and trunnion together. During the welding procedure, a flange between the trunnion and blade portion is formed with weld metal to the desired hydraulic contour. As an additional embodiment, the blade portion may be composed of separate plate steel portions welded together.
TURBINE PROPELLER BLADE
ABSTRACT OF THE DISCLOSURE
A method of fabricating a hydraulic turbine propeller blade is disclosed which includes welding the blade portion and trunnion together. During the welding procedure, a flange between the trunnion and blade portion is formed with weld metal to the desired hydraulic contour. As an additional embodiment, the blade portion may be composed of separate plate steel portions welded together.
Description
' ~06333~
This invention pertains in general to hydraulic ' turbines and more particularly to a methoa of fabricating a propeIler blade for a turbine.
In the past, it has been the practice to construct hydraulic turbine propeller blades of castings. After the basic design is established, wooden patterns are built from which the casting molds are formed. The first casting is a pilot which is approved to insure its compatability with'the established design. The final castings, after approval, are -then machined including grinding to the exact hydraùlic contour.
For one reason or another, the number of foundries ''' ,. . ~
available for producing satisfactory castings has decreased in the past few years. Not only is it difficult to find a j,i ,~, . . .
satisfactory foundry, ~ut the time required for delivery of the -' ' ;... . ..
castings has increased where in many cases it is the deciding ';''~
factor on whether or not an order can be obtained.
In many instances, it has therefor become necessary '''` ;' to fabricate'parts which have previously been cast. When ' '~' parts are manufactured by fabricating, individual components ;~;'' ' ,::: :-;;~ 2~ of the parts can be 'standardized and stocked to decrease the time required~for fabricating. Stocked plate steel of the `''`'' required thickness can ~e flame cut to the desired shape and i;~ ' then rolled and pressed to the desired contour to form the '' blade'portion. Large diameter bar skock can be aut to the `' ~' desired length and then welded to the formed plate portion to `' ' fabricate 'the propeller blade.
It is known in the prior art to utilize welding ' procedures to fabricate parts for a machine'as shown in the ~'~
;,. . .
following prior art patents which are cited as representative showings of the prior art: U.S. 1,995,451; U.S. 2,392,281; ~' ' and U.S. 2,778,095. ' ~
' , ~ ~ , ;
-- 1 -- .; . . .
~' . ' . .; .
` 1063330 It is, therefore, the intention and general object of this invention to provide a method of fabricatin~ a propeller ~ ;
blade for a hydraulic turbine which fuses together standardized stored components.
A more specific object of the subject invention is to provide a method of fabricating a hydraulic turbine propeller blade of the hereinbefore described type wherein the blade portion and trunnion are fused together by weld metal which forms a hydraulically contoured flange.
1~ A additional object of the subject invention is to provide a method of the hereinbefore described type wherein the blade portion is composed of plate steel portions welded together, rolled and pressed to the desired shape.
This invention is a method of fabricatinq a hydraulic turbine propeller blade having a cylindrical trunnion portion, a substantially flat blade portion anfl a contoured annular ;
flange joining said portions. This method provides a cooled -welding jacket which deflnes a receptacle substantially in the desired contoured shape of the annular flange to hold molten weld metal having one open end. One end of the trunnion is inserted into the receptacle through a first opening defined by the welding jacket to close the opening. The blade portion of the propeller blade is inserted into the receptacle through a second opening deEined by the welding jacket to close the opening. The trunnion and the blade portion of the propeller -~
is supported to position the ends within the receptacle with ;
respect to each o~her so as to be in the same relative position to each other as it is desired that the blade portion and `
trunnion have to each other in a finished propeller. The receptacle is substantially filled through the open end of the ~,~
welding jacket with molten weld metal forming the contoured
This invention pertains in general to hydraulic ' turbines and more particularly to a methoa of fabricating a propeIler blade for a turbine.
In the past, it has been the practice to construct hydraulic turbine propeller blades of castings. After the basic design is established, wooden patterns are built from which the casting molds are formed. The first casting is a pilot which is approved to insure its compatability with'the established design. The final castings, after approval, are -then machined including grinding to the exact hydraùlic contour.
For one reason or another, the number of foundries ''' ,. . ~
available for producing satisfactory castings has decreased in the past few years. Not only is it difficult to find a j,i ,~, . . .
satisfactory foundry, ~ut the time required for delivery of the -' ' ;... . ..
castings has increased where in many cases it is the deciding ';''~
factor on whether or not an order can be obtained.
In many instances, it has therefor become necessary '''` ;' to fabricate'parts which have previously been cast. When ' '~' parts are manufactured by fabricating, individual components ;~;'' ' ,::: :-;;~ 2~ of the parts can be 'standardized and stocked to decrease the time required~for fabricating. Stocked plate steel of the `''`'' required thickness can ~e flame cut to the desired shape and i;~ ' then rolled and pressed to the desired contour to form the '' blade'portion. Large diameter bar skock can be aut to the `' ~' desired length and then welded to the formed plate portion to `' ' fabricate 'the propeller blade.
It is known in the prior art to utilize welding ' procedures to fabricate parts for a machine'as shown in the ~'~
;,. . .
following prior art patents which are cited as representative showings of the prior art: U.S. 1,995,451; U.S. 2,392,281; ~' ' and U.S. 2,778,095. ' ~
' , ~ ~ , ;
-- 1 -- .; . . .
~' . ' . .; .
` 1063330 It is, therefore, the intention and general object of this invention to provide a method of fabricatin~ a propeller ~ ;
blade for a hydraulic turbine which fuses together standardized stored components.
A more specific object of the subject invention is to provide a method of fabricating a hydraulic turbine propeller blade of the hereinbefore described type wherein the blade portion and trunnion are fused together by weld metal which forms a hydraulically contoured flange.
1~ A additional object of the subject invention is to provide a method of the hereinbefore described type wherein the blade portion is composed of plate steel portions welded together, rolled and pressed to the desired shape.
This invention is a method of fabricatinq a hydraulic turbine propeller blade having a cylindrical trunnion portion, a substantially flat blade portion anfl a contoured annular ;
flange joining said portions. This method provides a cooled -welding jacket which deflnes a receptacle substantially in the desired contoured shape of the annular flange to hold molten weld metal having one open end. One end of the trunnion is inserted into the receptacle through a first opening defined by the welding jacket to close the opening. The blade portion of the propeller blade is inserted into the receptacle through a second opening deEined by the welding jacket to close the opening. The trunnion and the blade portion of the propeller -~
is supported to position the ends within the receptacle with ;
respect to each o~her so as to be in the same relative position to each other as it is desired that the blade portion and `
trunnion have to each other in a finished propeller. The receptacle is substantially filled through the open end of the ~,~
welding jacket with molten weld metal forming the contoured
- 2 ~063330 annular flange and uniting the end of the blade portion of the propeller within the receptacle with the end of the trunnion ~
within the receptacle. The cooling jacket is removed and the ``
weld metal formed flange is machined to a desired hydraulic contour.
These and other objects of the subject invention will become more fully apparent when the following description is read in li~ht of the attached drawings wherein:
Fig. 1 is a side elevation showing the components of the hydraulic turbine propeller blade being welded together;
Fig. 2 is a plan view of Fig. l; and Fig. 3 is an end view of Fig. 2.
Referring to the drawing, the propeller blade trunnion is generally designated 6 and the blade portion is generally designated 7. The blade portion 7 ma~ be composed of two components 8 and 9 united by a conventional weld indicated as 11. The blade portion 7 is composed of stocked plate steel of the desired thickness. The periPheral outline of the blade components 8 and 9 would in a conventional manner be flame cut ~0 to the desired peripheral configuration. The blade components 8 and 9 are then welded together and the finished blade portion 7 is then rolled and pressed to the desired hydraulic contour of a conventional propeller blade.
When utilizing the method of fabrication of this invention, the ~lade portion 7 is supported on jig stands 12 an~ 13. In like manner, the trunnion 6 is supported on jig stands 14 and 16. The trunnion and blade portions are positioned relative to one another so that when they are fused together with the weld metal they will be in the desired relative position for the finished propeller blade.
A water cooled weld jacket 17 which would conventionally be composed of copper is provided between the trunnion 6 and ~ :
lQ blade portion 7. Any conventional construction may ~e provided :
to permit assembly of the water jacket 17 about the trunnion and blade portion and such construction is herein shown as lncluding upper and lower jacket halves 18 and 12 each being provided with an attaching flange 21 and 22. Bolts or clamps ~ `
may be utili~ed to hold the assembled cooling jacket halves ;
together in the manner shown in the drawing. ~ , .
The water jacket, when assembled, defines an opening 23 having a diameter equal to the diameter of the trunnion 6.
The trunnion 6 extends through and closes this opening with i -2Q one end thereof extending into the interior or receptacle defined~by the water jacket. The other or facing wall of the ;
assembIed cooling jacket defines a slot 24 which is opened to `
the interior of the cooling jacket. This opening 24 is equal i~ ;
., to the thickness of the blade portion 7 which extends there-through and closes the opening 24.
Water passage ways 26 are provided through the walls ;
o~ the cooling jacket to e~fectively cool the jacket when the welding operation is conducted. Water inlet and discharge lines 27 and 28 are provided through the cooling ~acket to supply the water to the cooling passages.
..
`',.
~: .
within the receptacle. The cooling jacket is removed and the ``
weld metal formed flange is machined to a desired hydraulic contour.
These and other objects of the subject invention will become more fully apparent when the following description is read in li~ht of the attached drawings wherein:
Fig. 1 is a side elevation showing the components of the hydraulic turbine propeller blade being welded together;
Fig. 2 is a plan view of Fig. l; and Fig. 3 is an end view of Fig. 2.
Referring to the drawing, the propeller blade trunnion is generally designated 6 and the blade portion is generally designated 7. The blade portion 7 ma~ be composed of two components 8 and 9 united by a conventional weld indicated as 11. The blade portion 7 is composed of stocked plate steel of the desired thickness. The periPheral outline of the blade components 8 and 9 would in a conventional manner be flame cut ~0 to the desired peripheral configuration. The blade components 8 and 9 are then welded together and the finished blade portion 7 is then rolled and pressed to the desired hydraulic contour of a conventional propeller blade.
When utilizing the method of fabrication of this invention, the ~lade portion 7 is supported on jig stands 12 an~ 13. In like manner, the trunnion 6 is supported on jig stands 14 and 16. The trunnion and blade portions are positioned relative to one another so that when they are fused together with the weld metal they will be in the desired relative position for the finished propeller blade.
A water cooled weld jacket 17 which would conventionally be composed of copper is provided between the trunnion 6 and ~ :
lQ blade portion 7. Any conventional construction may ~e provided :
to permit assembly of the water jacket 17 about the trunnion and blade portion and such construction is herein shown as lncluding upper and lower jacket halves 18 and 12 each being provided with an attaching flange 21 and 22. Bolts or clamps ~ `
may be utili~ed to hold the assembled cooling jacket halves ;
together in the manner shown in the drawing. ~ , .
The water jacket, when assembled, defines an opening 23 having a diameter equal to the diameter of the trunnion 6.
The trunnion 6 extends through and closes this opening with i -2Q one end thereof extending into the interior or receptacle defined~by the water jacket. The other or facing wall of the ;
assembIed cooling jacket defines a slot 24 which is opened to `
the interior of the cooling jacket. This opening 24 is equal i~ ;
., to the thickness of the blade portion 7 which extends there-through and closes the opening 24.
Water passage ways 26 are provided through the walls ;
o~ the cooling jacket to e~fectively cool the jacket when the welding operation is conducted. Water inlet and discharge lines 27 and 28 are provided through the cooling ~acket to supply the water to the cooling passages.
..
`',.
~: .
- 3 - ~
'' -~63330 Hydraulic turbine propeller blades are provided with a hydraulically contoured flange between the blade portion and the trunnion. This is to insure a minimum adverse effect on the proper flow of the water through the turbine. With this in mind, at least the lower half portion of the cooling jacket is constructed of a contour to match the desired contour of the flange joining the trunnion and blade portion. In this regard, it should ~e noted that the ends of the trunnion 6 and blade ~ortion 7 are spaced a sufficient distance so that lQ the proper contour flange can be formed with the weld metal.
When depositing the weld metal in the receptacle defined ~y the water jac~et 17 for ease of operation, it is :~
preferred that consumable electrodes 29 be utilized. As the e}ectrodes are consumed, weld metal fuses the trunnion 6 and blade portion 7 together as the flange is constructed. After `~
the cooling jacket has been filled with weld metal, it is permitted to cool and then removed. The weld formed flange is then machined to the finished desired hydraulic contour.
This machining operation may include a rough burning of the flange and then a finish grinding.
From the above, it can be seen that a novel inexpensive method hàs been disclosed for fabricating a hydraulic turbine propeller blade wherein weld metal is utilized to form the blade flange. `
.
`; i ~
. ~, ''"
,i ~ `
;',' .
'' -~63330 Hydraulic turbine propeller blades are provided with a hydraulically contoured flange between the blade portion and the trunnion. This is to insure a minimum adverse effect on the proper flow of the water through the turbine. With this in mind, at least the lower half portion of the cooling jacket is constructed of a contour to match the desired contour of the flange joining the trunnion and blade portion. In this regard, it should ~e noted that the ends of the trunnion 6 and blade ~ortion 7 are spaced a sufficient distance so that lQ the proper contour flange can be formed with the weld metal.
When depositing the weld metal in the receptacle defined ~y the water jac~et 17 for ease of operation, it is :~
preferred that consumable electrodes 29 be utilized. As the e}ectrodes are consumed, weld metal fuses the trunnion 6 and blade portion 7 together as the flange is constructed. After `~
the cooling jacket has been filled with weld metal, it is permitted to cool and then removed. The weld formed flange is then machined to the finished desired hydraulic contour.
This machining operation may include a rough burning of the flange and then a finish grinding.
From the above, it can be seen that a novel inexpensive method hàs been disclosed for fabricating a hydraulic turbine propeller blade wherein weld metal is utilized to form the blade flange. `
.
`; i ~
. ~, ''"
,i ~ `
;',' .
- 4 - `
Claims
1. The method of fabricating a hydraulic turbine propeller blade having a cylindrical trunnion portion, a substantially flat blade portion and a contoured annular flange joining said portions, said method comprising the steps of:
(a) providing a cooled welding jacket defining a receptacle substantially in the desired contoured shape of said annular flange to hold molten weld metal having one open end;
(b) inserting one end of the trunnion into the receptacle through a first opening defined by the welding jacket to close the opening;
(c) inserting the blade portion of the propeller blade into the receptacle through a second opening defined by the welding jacket to close the opening;
(d) supporting the trunnion and the blade portion of the propeller to position the ends thereof within the receptacle with respect to each other so as to be positioned relative to each other as it is desired that the blade portion and trunnion have to each other in a finished propeller;
(e) substantially filling the receptacle through the open end of said welding jacket with molten weld metal to form the contoured annular flange and unite the end of the blade portion of the propeller within the receptacle with the end of the trunnion within the receptacle;
(f) removing the cooling jacket; and (g) machining the weld metal formed flange to a desired hydraulic contour.
(a) providing a cooled welding jacket defining a receptacle substantially in the desired contoured shape of said annular flange to hold molten weld metal having one open end;
(b) inserting one end of the trunnion into the receptacle through a first opening defined by the welding jacket to close the opening;
(c) inserting the blade portion of the propeller blade into the receptacle through a second opening defined by the welding jacket to close the opening;
(d) supporting the trunnion and the blade portion of the propeller to position the ends thereof within the receptacle with respect to each other so as to be positioned relative to each other as it is desired that the blade portion and trunnion have to each other in a finished propeller;
(e) substantially filling the receptacle through the open end of said welding jacket with molten weld metal to form the contoured annular flange and unite the end of the blade portion of the propeller within the receptacle with the end of the trunnion within the receptacle;
(f) removing the cooling jacket; and (g) machining the weld metal formed flange to a desired hydraulic contour.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US64329375A | 1975-12-22 | 1975-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1063330A true CA1063330A (en) | 1979-10-02 |
Family
ID=24580172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA255,484A Expired CA1063330A (en) | 1975-12-22 | 1976-06-23 | Method of fabricating hydraulic turbine propeller blade |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS5277942A (en) |
| CA (1) | CA1063330A (en) |
-
1976
- 1976-06-23 CA CA255,484A patent/CA1063330A/en not_active Expired
- 1976-12-16 JP JP51151454A patent/JPS5277942A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5277942A (en) | 1977-06-30 |
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