US20050109480A1 - Arrangement for providing heat to a portion of a component - Google Patents
Arrangement for providing heat to a portion of a component Download PDFInfo
- Publication number
- US20050109480A1 US20050109480A1 US10/978,429 US97842904A US2005109480A1 US 20050109480 A1 US20050109480 A1 US 20050109480A1 US 97842904 A US97842904 A US 97842904A US 2005109480 A1 US2005109480 A1 US 2005109480A1
- Authority
- US
- United States
- Prior art keywords
- component
- arrangement
- surface area
- elongate member
- oriented
- 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.)
- Abandoned
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
- B22D27/045—Directionally solidified castings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
An arrangement 10 for providing thermal energy to a portion 16 of a component 14 of a gas turbine engine while the component 14 is forming, wherein the component 14 is substantially elongate in a first direction 28 and the portion 16 extends from the component 14 in a second direction 38, substantially perpendicular to the first direction 28, and comprises a first surface area component 32 oriented in the first direction 28. The arrangement 10 further comprising an elongate member 18, connected to the portion 16 for heating the portion 16, wherein the elongate member 18 comprises a second surface area component 36, oriented in the second direction 38, wherein the second surface area component 36 of the elongate member 18 is greater than the first surface area component 32 of the portion 16.
Description
- Embodiments of the present invention relate to an arrangement for providing heat to a portion of a component and in particular a component of a gas turbine engine while the component is forming.
- Turbine components may currently be formed by providing a mould, filling the mould with a suitable material in liquid form and then cooling the material. Once the component has solidified within the mould, the mould is removed from the component. This process may be used to form single crystal turbine components and directionally solidified turbine components.
- A component may have several portions that protrude from the body of the component. These portions cool faster than the component body and may crystallise before the component. This creates a problem if the component is to be made from a single crystal since the portion may be made from one crystal and the component may be made from another crystal.
- Currently, extra material is added to increase the volume of the portion and thereby reduce its rate of cooling. The disadvantage of this method is that the extra material must be removed from the portion once the component has formed and then thrown away.
- Therefore it is desirable to provide an alternative arrangement for providing heat to a portion of a component of a gas turbine engine while it is forming.
- According to one aspect of the present invention there is provided an arrangement for providing heat to a portion of a component of a gas turbine engine while the component is forming, wherein the component is substantially elongate in a first direction and the portion extends from the component in a second direction, substantially perpendicular to the first direction, and comprises a first surface area component oriented in the first direction; the arrangement further comprising an elongate member, connected to the portion for heating the portion, wherein the elongate member comprises a second surface area component, oriented in the second direction, wherein the second surface area component of the elongate member is greater than the first surface area component of the portion.
- One advantage provided by the arrangement is that the thermal energy input to the second surface area component may be greater than the thermal energy output from the first surface area component. The elongate member consequently provides net thermal energy to the portion.
- According to a further aspect of the present invention there is provided a method for use in forming a component, wherein the component has a portion that extends from the component in a second direction, substantially perpendicular to a first direction, and an elongate member is connected to the portion for heating the portion, the method comprising: moving the component in the first direction; heating the elongate member as the component moves so that there is net thermal energy input for the portion.
- An advantage associated with the arrangement and method as described above is that due to the net thermal energy input to the portion, the portion may not form as a separate crystal to the component.
- The portion may comprise a third surface area component, which may be oriented in the second direction. The third surface area component may have an area less than the first surface area component. The combined surface area of the second surface area component and third surface area component may be greater than the area of the first surface area component. The net thermal energy input into the second surface area component and the third surface area component may be greater than the thermal energy output from the first surface area component.
- The arrangement may further comprise a heat source for providing thermal energy to the component. The heat source may annularly surround the component and may be oriented substantially perpendicular to the first direction. The heat source may radiate electromagnetic energy.
- The cross sectional area of the elongate member may increase with distance from where it joins the portion. One advantage is that the elongate member may be easier to remove from the portion once the portion has formed. The elongate member may be simple to remove from the portion and may cause little or no damage to the portion upon removal.
- The elongate member may additionally provide material to the portion, while the portion is forming. This may help maintain the volume of the portion. The elongate member may therefore additionally act as a solidification shrinkage feeder.
- An advantage provided by the arrangement and method described above, is that the removal of the elongate member wastes less material than the removal of extra material, added to increase the volume and reduce the rate of cooling of the portion. Therefore, the cost of single crystal and directionally solidified components for turbine assemblies may be reduced. Another advantage is that the time taken for assembly of single crystal and directionally solidified components may be reduced.
- The component may be made from a single crystal or may be a directionally solidified component. The component may be a turbine blade, a nozzle guide vane or a seal segment for a turbine assembly of a gas turbine engine. The portion may be a seal fin or a platform of a turbine blade.
- For a better understanding of the present invention reference will now be made by way of example only to the accompanying drawings in which:
-
FIG. 1 illustrates a schematic diagram of an arrangement for providing thermal energy to a portion of a component of a gas turbine engine. -
FIG. 2 illustrates the arrangement ofFIG. 1 when viewed along direction A. -
FIG. 3 illustrates the arrangement ofFIG. 1 when viewed along direction B. - The figures illustrate an
arrangement 10 for providing thermal energy to aportion 16 of acomponent 14 of a gas turbine engine while thecomponent 14 is forming, wherein thecomponent 14 is substantially elongate in afirst direction 28 and theportion 16 extends from thecomponent 14 in asecond direction 38, substantially perpendicular to thefirst direction 28, and comprises a firstsurface area component 32 oriented in thefirst direction 28; thearrangement 10 further comprising an elongate member 18, connected to theportion 16 for heating theportion 16, wherein the elongate member 18 comprises a secondsurface area component 36, oriented in thesecond direction 38, wherein the secondsurface area component 36 of the elongate member 18 is greater than the firstsurface area component 32 of theportion 16. -
FIG. 1 illustrates anarrangement 10 for providing thermal energy from aheat source 12 to acomponent 14 of a gas turbine engine. Thecomponent 14 comprises aportion 16 that is heated by theheat source 12 via an elongate member 18. The elongate member 18 is connected to theportion 16 and shaped so that there is a net thermal energy input into theportion 16, to increase the temperature of theportion 16, while thecomponent 14 is forming. - In more detail,
FIGS. 1 & 2 , illustrate thearrangement 10 having anannular tunnel 13 through which thecomponent 14 is moved while it is forming. Thecomponent 14 is moved from aninput 15 to anoutput 17 in afirst direction 28. Theannular tunnel 13 comprises aheat source 12, aninsulation zone 20 and acooling zone 22. Theheat source 12 is located at, or near, theinput 15 of theannular tunnel 13 and receives thecomponent 14. Theheat source 12, in this example, has a temperature of approximately 1,500° C. Theheat source 12 comprises a heating element which may be graphite. The graphite may be resistance or induction heated. Electric current is passed through the wire to heat the wire to a desired temperature. Theheat source 12 radiates electromagnetic energy. - The
insulation zone 20 is connected to theheat source 12 and is located beneath theheat source 12. Theinsulation zone 20 is typically made from a ceramic or mineral fibre. Thecooling zone 22 is located at, or near, theoutput 17 of theannular tunnel 13. Thecooling zone 22 has a temperature of approximately 1,200° C. Thecooling zone 22 comprises pipes through which water is passed to cool theannular tunnel 13. The temperature of thecooling zone 22 is less than the temperature of the region adjacent to theheat source 12. - The
component 14 is formed from amould 24 that is moved through theannular tunnel 13. Themould 24 is placed on acopper chill plate 26 and moved in afirst direction 28 from theinput 15 to theoutput 17. A material (any appropriate metal alloy suitable for the formation of a turbine blade) is fed into the mould from asource 30. The material is introduced in a liquid form which solidifies as it passes from theinput 15 to theoutput 17. Thesource 30 and the temperature are controlled so that the component is made either from a single crystal or is ‘directionally solidified’. - The
component 14 is elongate in thefirst direction 28. Theportion 16 extends from thecomponent 14 in asecond direction 38, perpendicular to thefirst direction 22. Theportion 16 comprises a firstsurface area component 32 and a thirdsurface area component 34. The surface area of the thirdsurface area component 34 is less than the area of the firstsurface area component 32. The thirdsurface area component 34 is orientated in thesecond direction 38 and is an input for thermal energy into theportion 16 from theheat source 12. The firstsurface area component 32 is orientated in thefirst direction 28, towards the coolingzone 22 and is an output for thermal energy. The elongate member 18 comprises a secondsurface area component 36. The secondsurface area component 36 is orientated in thesecond direction 38. - The area presented toward the heat source 12 (the combination of the second and third surface area components) is greater than the area presented away from the heat source (the first surface area component). Consequently, the net thermal energy input into the second
surface area component 36 and the thirdsurface area component 34 is greater than the thermal energy output from the firstsurface area component 32. Therefore, theportion 16 is heated by the elongate member 18. This may prevent the formation of a second crystal forming in theportion 16. - The elongate member 18 increases in cross sectional area from the join between the elongate member 18 and the portion 16 (base) to define a trapezium shape as illustrated in
FIG. 1 . Those features which are illustrated inFIG. 3 and are the same as those illustrated inFIG. 1 have been given the same reference numeral.FIG. 3 illustrates the arrangement ofFIG. 1 when viewed along direction B. The elongate member 18 is substantially rectangular when viewed in the direction B. It can also be seen fromFIG. 3 that the secondsurface area component 36 has a greater surface area than the thirdsurface area component 34. The elongate member 18 is, in this example, approximately 25 mm long and 3 mm deep. The dimensions of the elongate member 18 are chosen so that there is a net thermal energy input into theportion 16. The advantage provided by the shape of the elongate member 18, is that once the turbine blade has been formed, the elongate member 18 may be easily removed by force from theportion 16 since the width of the elongate member is least at its base. - After the
mould 24 has been filled with the material from thesource 30 and has moved from theheat source 12 to thecooling zone 22, it is then removed fromoutput 17 of thearrangement 10. Themould 24 is removed from thecomponent 14. The elongate member 18 is removed from theportion 16. The removal of the elongate member 18 is simple and causes little or no damage to thecomponent 14 or theportion 16. - An additional benefit is provided by the elongate member 18 while the component is forming. As the material in the
portion 16 cools, the volume of the material decreases. This could result in theportion 16 having internal or surface porosity. However, material from the elongate member 18 flows into theportion 16 to help maintain the volume of theportion 16. In this respect, the elongate member 18 additionally acts as a solidification shrinkage feeder. - The
component 14 is a component of a turbine. Thecomponent 14 may, for example, be a turbine blade, a nozzle guide vane or a seal segment. Theportion 16 may, for example, be a seal fin or a platform. - Although embodiments of the present invention have been described in the preceding paragraphs with reference to various examples, it should be appreciated that modifications to the examples given can be made without departing from the scope of the invention as claimed. For example, the mould may be used for the formation of a plurality of
components 14. The elongate member 18 may have any suitable shape 18 that allows it to provide thermal energy to theportion 16. - Whilst endeavouring in the foregoing specification to draw attention to those features of the invention believed to be of particular importance it should be understood that the Applicant claims protection in respect of any patentable feature or combination of features hereinbefore referred to and/or shown in the drawings whether or not particular emphasis has been placed thereon.
Claims (15)
1. An arrangement for providing heat to a portion of a component while the component is forming, wherein the component is substantially elongate in a first direction and the portion extends from the component in a second direction, substantially perpendicular to the first direction, and comprises a first surface area component oriented in the first direction;
the arrangement further comprising an elongate member, connected to the portion for heating the portion, wherein the elongate member comprises a second surface area component, oriented in the second direction, wherein the second surface area component of the elongate member is greater than the first surface area component of the portion.
2. An arrangement as claimed in claim 1 , wherein the portion further comprises a third surface area component, oriented in the second direction and has an area less than the first surface area component.
3. An arrangement as claimed in claim 2 , wherein the combined surface area of the second surface area component and the third surface area component is greater than the area of the first surface area component.
4. An arrangement as claimed in claim 1 , further comprising a heat source for providing thermal energy to the component.
5. An arrangement as claimed in claim 4 , wherein the heat source annularly surrounds the component and is oriented, substantially perpendicular to the first direction.
6. An arrangement as claimed in claim 4 , wherein the heat source radiates electromagnetic energy.
7. An arrangement as claimed in claim 1 , wherein the portion is a seal fin of a turbine blade.
8. An arrangement as claimed in claim 1 , wherein the portion is a platform of a turbine blade.
9. An arrangement as claimed in claim 1 , wherein the cross sectional area of the elongate member increases with distance from where it joins the portion.
10. An arrangement as claimed in claim 1 , wherein the elongate member additionally provides material to the portion, while the portion is forming.
11. An arrangement as claimed in claim 1 , wherein the elongate member is removed from the portion after the component has formed.
12. An arrangement as claimed in claim 1 , wherein the component is one of a blade, nozzle guide vane and a seal segment for a turbine assembly of a gas turbine engine.
13. A method for use in forming a component of a gas turbine engine, wherein the component has a portion that extends from the component in a second direction, substantially perpendicular to a first direction, and an elongate member is connected to the portion for heating the portion, the method comprising: moving the component in the first direction; and heating the elongate member as the component moves so that there is net thermal energy input for the portion.
14. A method as claimed in claim 13 , further comprising removing the elongate member from the component.
15. A component produced by the method as claimed in claim 13.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/294,408 US20060090822A1 (en) | 2003-11-26 | 2005-12-06 | Arrangement for providing heat to a portion of a component |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB0327462.8A GB0327462D0 (en) | 2003-11-26 | 2003-11-26 | An arrangement for providing heat to a portion of a component of a gas turbine engine |
GB0327462.8 | 2003-11-26 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/294,408 Division US20060090822A1 (en) | 2003-11-26 | 2005-12-06 | Arrangement for providing heat to a portion of a component |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050109480A1 true US20050109480A1 (en) | 2005-05-26 |
Family
ID=29797828
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/978,429 Abandoned US20050109480A1 (en) | 2003-11-26 | 2004-11-02 | Arrangement for providing heat to a portion of a component |
US11/294,408 Abandoned US20060090822A1 (en) | 2003-11-26 | 2005-12-06 | Arrangement for providing heat to a portion of a component |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/294,408 Abandoned US20060090822A1 (en) | 2003-11-26 | 2005-12-06 | Arrangement for providing heat to a portion of a component |
Country Status (3)
Country | Link |
---|---|
US (2) | US20050109480A1 (en) |
EP (1) | EP1535679A1 (en) |
GB (1) | GB0327462D0 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2432133A (en) * | 2005-11-15 | 2007-05-16 | Rolls Royce Plc | A feeder for a cast turbine blade |
Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3192578A (en) * | 1960-06-08 | 1965-07-06 | Gen Motors Corp | Core making apparatus |
US3260505A (en) * | 1963-10-21 | 1966-07-12 | United Aircraft Corp | Gas turbine element |
US3921271A (en) * | 1973-01-02 | 1975-11-25 | Gen Electric | Air-cooled turbine blade and method of making same |
US4737417A (en) * | 1984-10-27 | 1988-04-12 | Korber Ag | Cast fixture for holding composite workpieces |
US4804311A (en) * | 1981-12-14 | 1989-02-14 | United Technologies Corporation | Transverse directional solidification of metal single crystal articles |
US5066223A (en) * | 1990-07-13 | 1991-11-19 | Leybold Aktiengesellschaft | Melting and casting furnace |
US5234047A (en) * | 1991-10-09 | 1993-08-10 | Rolls-Royce Plc | Mould for casting components |
US5641014A (en) * | 1992-02-18 | 1997-06-24 | Allison Engine Company | Method and apparatus for producing cast structures |
US5680895A (en) * | 1995-06-07 | 1997-10-28 | Allison Engine Company | Apparatus for directional solidification of integral component casting |
US5899257A (en) * | 1982-09-28 | 1999-05-04 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation | Process for the fabrication of monocrystalline castings |
US6217286B1 (en) * | 1998-06-26 | 2001-04-17 | General Electric Company | Unidirectionally solidified cast article and method of making |
US6276432B1 (en) * | 1999-06-10 | 2001-08-21 | Howmet Research Corporation | Directional solidification method and apparatus |
US6497272B1 (en) * | 1999-10-14 | 2002-12-24 | Howmet Research Corporation | Single crystal casting mold |
US6568456B1 (en) * | 1999-08-11 | 2003-05-27 | Alstom | Method for manufacture of a directionally solidified columnar grained article |
US6619373B1 (en) * | 2002-04-25 | 2003-09-16 | General Motors Corporation | Lost foam casting apparatus for reducing porosity and inclusions in metal castings |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2259660A (en) * | 1991-09-17 | 1993-03-24 | Rolls Royce Plc | A mould for casting components |
-
2003
- 2003-11-26 GB GBGB0327462.8A patent/GB0327462D0/en not_active Ceased
-
2004
- 2004-11-01 EP EP04256739A patent/EP1535679A1/en not_active Withdrawn
- 2004-11-02 US US10/978,429 patent/US20050109480A1/en not_active Abandoned
-
2005
- 2005-12-06 US US11/294,408 patent/US20060090822A1/en not_active Abandoned
Patent Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3192578A (en) * | 1960-06-08 | 1965-07-06 | Gen Motors Corp | Core making apparatus |
US3260505A (en) * | 1963-10-21 | 1966-07-12 | United Aircraft Corp | Gas turbine element |
US3921271A (en) * | 1973-01-02 | 1975-11-25 | Gen Electric | Air-cooled turbine blade and method of making same |
US4804311A (en) * | 1981-12-14 | 1989-02-14 | United Technologies Corporation | Transverse directional solidification of metal single crystal articles |
US5899257A (en) * | 1982-09-28 | 1999-05-04 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation | Process for the fabrication of monocrystalline castings |
US4737417A (en) * | 1984-10-27 | 1988-04-12 | Korber Ag | Cast fixture for holding composite workpieces |
US5066223A (en) * | 1990-07-13 | 1991-11-19 | Leybold Aktiengesellschaft | Melting and casting furnace |
US5234047A (en) * | 1991-10-09 | 1993-08-10 | Rolls-Royce Plc | Mould for casting components |
US5641014A (en) * | 1992-02-18 | 1997-06-24 | Allison Engine Company | Method and apparatus for producing cast structures |
US5680895A (en) * | 1995-06-07 | 1997-10-28 | Allison Engine Company | Apparatus for directional solidification of integral component casting |
US6217286B1 (en) * | 1998-06-26 | 2001-04-17 | General Electric Company | Unidirectionally solidified cast article and method of making |
US6276432B1 (en) * | 1999-06-10 | 2001-08-21 | Howmet Research Corporation | Directional solidification method and apparatus |
US6568456B1 (en) * | 1999-08-11 | 2003-05-27 | Alstom | Method for manufacture of a directionally solidified columnar grained article |
US6497272B1 (en) * | 1999-10-14 | 2002-12-24 | Howmet Research Corporation | Single crystal casting mold |
US6619373B1 (en) * | 2002-04-25 | 2003-09-16 | General Motors Corporation | Lost foam casting apparatus for reducing porosity and inclusions in metal castings |
Also Published As
Publication number | Publication date |
---|---|
GB0327462D0 (en) | 2003-12-31 |
US20060090822A1 (en) | 2006-05-04 |
EP1535679A1 (en) | 2005-06-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ROLLS ROYCE PLC, ENGLAND Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BOSWELL, JOHN HAROLD;REEL/FRAME:015952/0051 Effective date: 20040914 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO PAY ISSUE FEE |