US3632225A - Steam turbines - Google Patents
Steam turbines Download PDFInfo
- Publication number
- US3632225A US3632225A US850167A US3632225DA US3632225A US 3632225 A US3632225 A US 3632225A US 850167 A US850167 A US 850167A US 3632225D A US3632225D A US 3632225DA US 3632225 A US3632225 A US 3632225A
- Authority
- US
- United States
- Prior art keywords
- turbine
- blades
- steam
- drainage area
- wall
- 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 - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000011144 upstream manufacturing Methods 0.000 claims description 18
- 238000000605 extraction Methods 0.000 description 3
- 238000004326 stimulated echo acquisition mode for imaging Methods 0.000 description 2
- 235000008694 Humulus lupulus Nutrition 0.000 description 1
- 244000025221 Humulus lupulus Species 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003809 water extraction Methods 0.000 description 1
Images
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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
Definitions
- ABSTRACT A steam turbine in which means for extracting water from wet steam has at least one drainage area in the tur- [54] STEAM TURBINES bine casing, with such area being located downstream of a row 6 Claims,3Drawing Figs.
- the [50] Field 415 21 drainage area comprising a plurality of circumferentially spaced elongated slots, the slots being disposed to lie transversely across the path of the wet steam in the region of the [56] Ref Ci drainage area and being adapted for connection to a region UNITED STATES PATENTS which in operation of the turbine is at a lower pressure than 745,045 1 1/1903 Emmet 415/121 the steam pressure m the region of the dramage area PATENIEB JR!
- an axial flow steam turbine comprises a turbine casing, a row of rotatable blades having tips and trailing and leading edges mounted within the casing, a row of stationary blades supported within the casing in spaced relationship to the rotatable blades downstream of the rotatable blades, and a drainage area between the rotatable blades and stationary blades for extracting water from wet steam flowing axially through the turbine casing, and drainage area including a circular wall carried by the turbine casing, said wall having upstream and downstream edges, with the upstream edge being immediately adjacent of the tips of the rotatable blades and the downstream edge upstream of but spaced from in unobstructed communication with the stationary blades, said wall being provided with a plurality of elongated longitudinal slots extending between the upstream and downstream edges along planes approximately containing the axis of rotation of the rotatable blades and being disposed transversely across the path of the wet steam in the region of the drainage area, the upstream edge of the wall being of
- the invention also consists in a steam turbine with means for extracting water in accordance with the preceding paragraph in which the drainage area is connectable to a region at condenser pressure.
- the invention also consists in a steam turbine with means for extracting water in accordance with the first of the preceding two paragraphs in which the drainage area is adapted for connecting to a feed heater.
- the invention also consists in a steam turbine with means for extracting water in accordance with any of the preceding three paragraphs in which means are provided to keep the component of steam velocity normal to the turbine casing wall surrounding the rotatable blade row or to the drainage area in the turbine casing, or both, below a predetermined value such that rebound of water droplets from the wall of the casing is eliminated or minimized.
- the invention also consists in a steam turbine with means for extracting water in accordance with the preceding paragraph in which the wall of the turbine surrounding the rotatable blade row or the slotted drainage area, or both, are shaped so as to reduce the angle of impact of water droplets.
- the invention also consists in a steam turbine with means for extracting water from wet steam substantially as described hereinbelow with reference to the accompanying drawings.
- FIG. 1 is a cross section through part of a steam turbine showing means for removing water from wet steam in accordance with one embodiment of the present invention
- FIG. 2 is a view similar to FIG. 1 showing alternative means for removing water from the wet steam;
- FIG. 3 is a part section on line 3-3 of FIG. 1 and shows a typical form of drainage area for the turbine casing and suitable for use with the arrangements illustrated in FIG. 1 or FIG. 2.
- an axial flow steam turbine comprises a rotor carrying rows of blades of which one row is shown at 1 and an outer casing 2 carrying rows of fixed stationary blades 3.
- a water drainage area denoted generally 4 is provided for the casing 2 downstream of the row of rotatable blades 1.
- This drainage area comprises a wall 4a having an upstream edge 4b and a downstream edge 40.
- the wall 4a is provided with a plurality of circumferentially spaced elongated longitudinal slots 5 which extend along planes containing the axis of rotation of the rotor from the edge 4b to the edge 40 and are disposed transversely across the path of the wet steam in the region of the area 4.
- Each slot 5 has opposed longitudinal edges 5a disposed in a single surface of revolution common to all slot edges.
- the slots are connectable to or communicate with a region 5b at a lower pressure than that of the steam in the region of the drainage area. In one form, they are connected to an enclosure at condenser pressure.
- the turbine has steam extracted at various stages for the purpose of feed heating, it is preferable to arrange the drainage area at a steam extraction stage.
- wall 4a at the upstream edge 4b thereof is circular and is substantially equal in diameter to portion 2a of the turbine casing 2 surrounding the trailing edge In of the blades 1.
- the upstream edge of the wall is of a diameter closely approximating to, while being greater than the diameter of a circle defined by the tips of the blades 1 at their trailing edges.
- the extraction of water droplets from wet steam through the drainage area can be improved by arranging that the component of steam velocity normal to the casing wall surrounding the rotatable blade row is below a predetermined value so that rebound of the water droplets from the wall of the casing is eliminated or minimized.
- FIG. 2 shows an arrangement for this purpose, with the end of the rotor blade having a sloping edge which is matched by a sloping wall in the casing.
- the shape of the turbine casing at the drainage area itself may also be arranged to reduce the angle of impact of water droplets thereon for the same reason.
- FIG. 3 shows a section through part of the casing wall at the drainage area showing the slots 5.
- wall portions between the slots of the slotted wall are sufficiently thick in relation to the slot width then their leading edges may be chamfered as indicated at 5c in FIG. 3 so as to prevent rebound of the water from the blunt edge back into the steam fiow.
- the slotted extraction system shown offers a method of controlling the velocity or bled steam for any fixed total bleed quantity by varying either the number of slots or the slot gap which enables the water extraction rate to be optimized.
- An axial flow steam turbine comprising a turbine casing, a row of rotatable blades having tips and trailing and leading edges mounted within the casing, a row of stationary blades supported within the casing in spaced relationship to the rotatable blades downstream of the rotatable blades, and a drainage area between the rotatable blades and stationary blades for extracting water from wet steam flowing axially through the turbine, said drainage area including a circular wall carried by the turbine casing having upstream and downstream edges, with the upstream edge being immediately adjacent the leading edges of the tips of the rotatable blades and the downstream edge upstream of but spaced from in unobstructed communication with the stationary blades, said wall being provided with a plurality of elongated longitudinal slots extending between the upstream and downstream edges along planes approximately containing the axis of rotation of the rotatable blades and being disposed transversely across the path of the wet steam in the region of the drainage area, the upstream edge of the wall being of a diameter closely approx
- the interior surface of the turbine casing surrounding the rotatable blades having a cone angle substantially greater than that of the wall and the inner surface of the casing surrounding the stationary blades.
Abstract
A steam turbine in which means for extracting water from wet steam has at least one drainage area in the turbine casing, with such area being located downstream of a row of rotatable blades adjacent the outlet for steam therefrom and intermediate the row of rotatable blades and an immediately adjacent downstream row of stationary blades, the drainage area comprising a plurality of circumferentially spaced elongated slots, the slots being disposed to lie transversely across the path of the wet steam in the region of the drainage area and being adapted for connection to a region which in operation of the turbine is at a lower pressure than the steam pressure in the region of the drainage area.
Description
[72] Inventors Allen Smith; 1,165,922 12/1915 Wagner 415/168 Colin Trevor Moore, both of Newcastle 1,845,190 2/ 1 932 Reich 415/121 1 l N ggg g land FOREIGN PATENTS 5 gm Au 14 1969 210,881 11/1940 Switzerland 415/168 [45] Patented 361,819 6/1962 Switzerland..... 415/168 [73] Assignee C. A. Parsons & Company Limited 388,156 2/1933 Great Britain 415/168 Newcastle upon Tyne, England Primary ExaminerHenry F. Raduazo [32] Priority Aug. 21, 1968 Attorney-Holman & Stern [33] Great Britain 39987/68 ABSTRACT: A steam turbine in which means for extracting water from wet steam has at least one drainage area in the tur- [54] STEAM TURBINES bine casing, with such area being located downstream of a row 6 Claims,3Drawing Figs. of rotatable blades adjacent the outlet for steam therefrom 5 and intermediate matable blades and g 3 mediately adjacent downstream row of stationary blades, the [50] Field 415 21 drainage area comprising a plurality of circumferentially spaced elongated slots, the slots being disposed to lie transversely across the path of the wet steam in the region of the [56] Ref Ci drainage area and being adapted for connection to a region UNITED STATES PATENTS which in operation of the turbine is at a lower pressure than 745,045 1 1/1903 Emmet 415/121 the steam pressure m the region of the dramage area PATENIEB JR! 4 I972 SHEET 1 [IF 2 INVENTOR Y ALLEN SMITH ET AL BYAWJ M tha ATTORNEYS PATENTEBJAN 41972 31632225 SHEET 2 0F 2 INVENTOR ALLEN SMITH ET AL v BYfil-pam' I: I M! ATTORNEYS STEAM TURBINES This invention relates to steam turbines and is concerned with means for extracting water from wet steam in such turbines.
According to the present invention, an axial flow steam turbine comprises a turbine casing, a row of rotatable blades having tips and trailing and leading edges mounted within the casing, a row of stationary blades supported within the casing in spaced relationship to the rotatable blades downstream of the rotatable blades, and a drainage area between the rotatable blades and stationary blades for extracting water from wet steam flowing axially through the turbine casing, and drainage area including a circular wall carried by the turbine casing, said wall having upstream and downstream edges, with the upstream edge being immediately adjacent of the tips of the rotatable blades and the downstream edge upstream of but spaced from in unobstructed communication with the stationary blades, said wall being provided with a plurality of elongated longitudinal slots extending between the upstream and downstream edges along planes approximately containing the axis of rotation of the rotatable blades and being disposed transversely across the path of the wet steam in the region of the drainage area, the upstream edge of the wall being of a diameter of a circle defined by the tips of the rotating blades at their trailing edges, each of the slots having two opposed longitudinally extending edges disposed in a single surface of revolution common to all the longitudinally extending edges, whereby upon operation of the turbine, a substantially circumferentially flowing film of water moves from the rotatable blades and flows over the wall, and a region which, in operation, is at a pressure lower than the steam pressure in the drainage area and with which region the elongated slots communicate.
The invention also consists in a steam turbine with means for extracting water in accordance with the preceding paragraph in which the drainage area is connectable to a region at condenser pressure.
The invention also consists in a steam turbine with means for extracting water in accordance with the first of the preceding two paragraphs in which the drainage area is adapted for connecting to a feed heater.
The invention also consists in a steam turbine with means for extracting water in accordance with any of the preceding three paragraphs in which means are provided to keep the component of steam velocity normal to the turbine casing wall surrounding the rotatable blade row or to the drainage area in the turbine casing, or both, below a predetermined value such that rebound of water droplets from the wall of the casing is eliminated or minimized.
The invention also consists in a steam turbine with means for extracting water in accordance with the preceding paragraph in which the wall of the turbine surrounding the rotatable blade row or the slotted drainage area, or both, are shaped so as to reduce the angle of impact of water droplets.
The invention also consists in a steam turbine with means for extracting water from wet steam substantially as described hereinbelow with reference to the accompanying drawings.
Referring to the aforesaid drawings:
FIG. 1 is a cross section through part of a steam turbine showing means for removing water from wet steam in accordance with one embodiment of the present invention;
FIG. 2 is a view similar to FIG. 1 showing alternative means for removing water from the wet steam; and
FIG. 3 is a part section on line 3-3 of FIG. 1 and shows a typical form of drainage area for the turbine casing and suitable for use with the arrangements illustrated in FIG. 1 or FIG. 2.
ln carrying the invention into effect in the form illustrated by way of example and referring first to FIG. 1, an axial flow steam turbine comprises a rotor carrying rows of blades of which one row is shown at 1 and an outer casing 2 carrying rows of fixed stationary blades 3. A water drainage area denoted generally 4 is provided for the casing 2 downstream of the row of rotatable blades 1. This drainage area comprises a wall 4a having an upstream edge 4b and a downstream edge 40. The wall 4a is provided with a plurality of circumferentially spaced elongated longitudinal slots 5 which extend along planes containing the axis of rotation of the rotor from the edge 4b to the edge 40 and are disposed transversely across the path of the wet steam in the region of the area 4. Each slot 5 has opposed longitudinal edges 5a disposed in a single surface of revolution common to all slot edges.
The slots are connectable to or communicate with a region 5b at a lower pressure than that of the steam in the region of the drainage area. In one form, they are connected to an enclosure at condenser pressure.
Where the turbine has steam extracted at various stages for the purpose of feed heating, it is preferable to arrange the drainage area at a steam extraction stage.
It will be noted that wall 4a at the upstream edge 4b thereof is circular and is substantially equal in diameter to portion 2a of the turbine casing 2 surrounding the trailing edge In of the blades 1. In order words, the upstream edge of the wall is of a diameter closely approximating to, while being greater than the diameter of a circle defined by the tips of the blades 1 at their trailing edges.
In some circumstances, the extraction of water droplets from wet steam through the drainage area can be improved by arranging that the component of steam velocity normal to the casing wall surrounding the rotatable blade row is below a predetermined value so that rebound of the water droplets from the wall of the casing is eliminated or minimized.
FIG. 2 shows an arrangement for this purpose, with the end of the rotor blade having a sloping edge which is matched by a sloping wall in the casing. The shape of the turbine casing at the drainage area itself may also be arranged to reduce the angle of impact of water droplets thereon for the same reason.
FIG. 3 shows a section through part of the casing wall at the drainage area showing the slots 5.
If the wall portions between the slots of the slotted wall are sufficiently thick in relation to the slot width then their leading edges may be chamfered as indicated at 5c in FIG. 3 so as to prevent rebound of the water from the blunt edge back into the steam fiow.
The slotted extraction system shown offers a method of controlling the velocity or bled steam for any fixed total bleed quantity by varying either the number of slots or the slot gap which enables the water extraction rate to be optimized.
We claim:
1. An axial flow steam turbine comprising a turbine casing, a row of rotatable blades having tips and trailing and leading edges mounted within the casing, a row of stationary blades supported within the casing in spaced relationship to the rotatable blades downstream of the rotatable blades, and a drainage area between the rotatable blades and stationary blades for extracting water from wet steam flowing axially through the turbine, said drainage area including a circular wall carried by the turbine casing having upstream and downstream edges, with the upstream edge being immediately adjacent the leading edges of the tips of the rotatable blades and the downstream edge upstream of but spaced from in unobstructed communication with the stationary blades, said wall being provided with a plurality of elongated longitudinal slots extending between the upstream and downstream edges along planes approximately containing the axis of rotation of the rotatable blades and being disposed transversely across the path of the wet steam in the region of the drainage area, the upstream edge of the wall being of a diameter closely approximating to, while being greater than the diameter of a circle defined by the tips of the rotating blades at their trailing edges, each of the slots having two opposed longitudinally extending edges disposed in a single surface of a revolution common to all of the longitudinally extending edges, whereby upon operation of the turbine, a substantially circumferentially flowing film of water moves from the rotatable blades and flows over the wall, and a region which, in operation, is at a pressure lower than the steam pressure in the drainage are with which the slots communicate.
2. The steam turbine as claimed in claim 1 in which said region with which the drainage area communicates is at condenser pressure.
3. The steam turbine as claimed in claim 1 in which the region with which the drainage area communicates is a feed heater.
4. The steam turbine as claimed in claim 1 in which said wall is generally conical in configuration, and the interior of the turbine casing surrounding the rotatable blades and the stationary blades being generally conical in configuration, and
the interior surface of the turbine casing surrounding the rotatable blades having a cone angle substantially greater than that of the wall and the inner surface of the casing surrounding the stationary blades.
5. The steam turbine as claimed in claim 1 in which the surface of revolution common to all of the longitudinally extending edges of the slots is a cone.
6. The steam turbine as claimed in claim 1 in which the surface of revolution common to all of the longitudinally extending edges of the slots is a cylinder.
i t i
Claims (6)
1. An axial flow steam turbine comprising a turbine casing, a row of rotatable blades having tips and trailing and leading edges mounted within the casing, a row of stationary blades supported within the casing in spaced relationship to the rotatable blades downstream of the rotatable blades, and a drainage area between the rotatable blades and stationary blades for extracting water from wet steam flowing axially through the turbine, said drainage area including a circular wall carried by the turbine casing having upstream and downstream edges, with the upstream edge being immediately adjacent the leading edges of the tips of the rotatable blades and the downstream edge upstream of but spaced from in unobstructed communication with the stationary blades, said wall being provided with a plurality of elongated longitudinal slots extending between the upstream and downstream edges along planes approximately containing the axis of rotation of the rotatable blades and being disposed transversely across the path of the wet steam in the region of the drainage area, the upstream edge of the wall being of a diameter closely approximating to, while being greater than the diameter of a circle defined by the tips of the rotating blades at their trailing edges, each of the slots having two opposed longitudinally extending edges disposed in a single surface of a revolution common to all of the longitudinally extending edges, whereby upon operation of the turbine, a substantially circumferentially flowing film of water moves from the rotatable blades and flows over the wall, and a region which, in operation, is at a pressure lower than the steam pressure in the drainage are with which the slots communicate.
2. The steam turbine as claimed in claim 1 in which said region with which the drainage area communicates is at condenser pressure.
3. The steam turbine as claimed in claim 1 in which the region with which the drainage area communicates is a feed heater.
4. The steam turbine as claimed in claim 1 in which said wall is generally conical in configuration, and the interior of the turbine casing surrounding the rotatable blades and the stationary blades being generally conical in configuration, and the interior surface of the turbine casing surrounding the rotatable blades having a cone angle substantially greater than that of the wall and the inner surface of the casing surrounding the stationary blades.
5. The steam turbine as claimed in claim 1 in which the surface of revolution common to all of the longitudinally extending edges of the slots is a cone.
6. The steam turbine as claimed in claim 1 in which the surface of revolution common to all of the longitudinally extending edges of the slots is a cylinder.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB39987/68A GB1283044A (en) | 1968-08-21 | 1968-08-21 | Improvements in and relating to steam turbines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3632225A true US3632225A (en) | 1972-01-04 |
Family
ID=10412587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US850167A Expired - Lifetime US3632225A (en) | 1968-08-21 | 1969-08-14 | Steam turbines |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3632225A (en) |
| GB (1) | GB1283044A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4326374A (en) * | 1980-03-18 | 1982-04-27 | The United States Of America As Represented By The Secretary Of The Navy | High velocity exhaust diffuser and water baffle |
| US5037114A (en) * | 1990-01-26 | 1991-08-06 | Westinghouse Electric Corp. | Labyrinth seal for steam turbines |
| US5676521A (en) * | 1996-07-22 | 1997-10-14 | Haynes; Christopher J. | Steam turbine with superheat retaining extraction |
| US5984628A (en) * | 1995-03-20 | 1999-11-16 | Siemens Westinghouse Power Corporation | Steam turbine |
| US20070020136A1 (en) * | 2005-07-01 | 2007-01-25 | Sarath Menon | High temperature niobium alloy |
| US20080050221A1 (en) * | 2006-08-28 | 2008-02-28 | General Electric | Systems for moisture removal in steam turbine engines |
| US20100329853A1 (en) * | 2009-06-30 | 2010-12-30 | General Electric Company | Moisture removal provisions for steam turbine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US745045A (en) * | 1903-06-22 | 1903-11-24 | Gen Electric | Means for separating moisture from vapor in turbines. |
| US1165922A (en) * | 1914-12-07 | 1915-12-28 | Gen Electric | Draining steam-turbines. |
| US1845190A (en) * | 1930-04-26 | 1932-02-16 | Gen Electric | Elastic fluid turbine |
| GB388156A (en) * | 1930-12-13 | 1933-02-23 | Asea Ab | Improvements in means for draining off moisture from the steam in steam turbines |
| CH210881A (en) * | 1939-07-31 | 1940-08-15 | Escher Wyss Maschf Ag | Steam turbine, of which at least some of the stages work in the wet steam area. |
| CH361819A (en) * | 1958-11-27 | 1962-05-15 | Escher Wyss Ag | Dewatering device on a steam turbine stage |
-
1968
- 1968-08-21 GB GB39987/68A patent/GB1283044A/en not_active Expired
-
1969
- 1969-08-14 US US850167A patent/US3632225A/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US745045A (en) * | 1903-06-22 | 1903-11-24 | Gen Electric | Means for separating moisture from vapor in turbines. |
| US1165922A (en) * | 1914-12-07 | 1915-12-28 | Gen Electric | Draining steam-turbines. |
| US1845190A (en) * | 1930-04-26 | 1932-02-16 | Gen Electric | Elastic fluid turbine |
| GB388156A (en) * | 1930-12-13 | 1933-02-23 | Asea Ab | Improvements in means for draining off moisture from the steam in steam turbines |
| CH210881A (en) * | 1939-07-31 | 1940-08-15 | Escher Wyss Maschf Ag | Steam turbine, of which at least some of the stages work in the wet steam area. |
| CH361819A (en) * | 1958-11-27 | 1962-05-15 | Escher Wyss Ag | Dewatering device on a steam turbine stage |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4326374A (en) * | 1980-03-18 | 1982-04-27 | The United States Of America As Represented By The Secretary Of The Navy | High velocity exhaust diffuser and water baffle |
| US5037114A (en) * | 1990-01-26 | 1991-08-06 | Westinghouse Electric Corp. | Labyrinth seal for steam turbines |
| US5984628A (en) * | 1995-03-20 | 1999-11-16 | Siemens Westinghouse Power Corporation | Steam turbine |
| US5676521A (en) * | 1996-07-22 | 1997-10-14 | Haynes; Christopher J. | Steam turbine with superheat retaining extraction |
| US20070020136A1 (en) * | 2005-07-01 | 2007-01-25 | Sarath Menon | High temperature niobium alloy |
| US7632455B2 (en) * | 2005-07-01 | 2009-12-15 | Ues, Inc. | High temperature niobium alloy |
| US20080050221A1 (en) * | 2006-08-28 | 2008-02-28 | General Electric | Systems for moisture removal in steam turbine engines |
| US7789618B2 (en) * | 2006-08-28 | 2010-09-07 | General Electric Company | Systems for moisture removal in steam turbine engines |
| CN101135251B (en) * | 2006-08-28 | 2012-11-14 | 通用电气公司 | Systems for moisture removal in steam turbine engines |
| US20100329853A1 (en) * | 2009-06-30 | 2010-12-30 | General Electric Company | Moisture removal provisions for steam turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1283044A (en) | 1972-07-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5488825A (en) | Gas turbine vane with enhanced cooling | |
| US3632221A (en) | Gas turbine engine cooling system incorporating a vortex shaft valve | |
| US2401826A (en) | Turbine | |
| JP5235327B2 (en) | Fan blade and turbofan engine assembly | |
| US20160186690A1 (en) | Non-axisymmetric fan flow path | |
| DE2718663A1 (en) | AIR TEMPERATURE HISTORY DETECTION DEVICE | |
| JPH11148308A (en) | Shroud band for axial-flow turbine | |
| JP2016519246A (en) | Anti-ice splitter nose | |
| JP2009047411A (en) | Turbo machine diffuser | |
| CA2927035C (en) | Rotor assembly with wear member | |
| US20150300254A1 (en) | Propulsion engine | |
| US4571937A (en) | Apparatus for controlling the flow of leakage and cooling air of a rotor of a multi-stage turbine | |
| US3632225A (en) | Steam turbines | |
| CA2927037C (en) | Rotor assembly with scoop | |
| US2795373A (en) | Guide vane assemblies in annular fluid ducts | |
| US20170292393A1 (en) | Tangential on-board injectors for gas turbine engines | |
| WO2015130384A2 (en) | Fan nacelle inlet flow control | |
| US3365124A (en) | Compressor structure | |
| US20200332658A1 (en) | Fan blade ice protection using hot air | |
| US2764390A (en) | Anti-icing device | |
| KR930021928A (en) | Axial flow turbine | |
| GB1161186A (en) | A Gas Turbine Ducted Fan Engine. | |
| US2726725A (en) | Propeller spinner utilizing boundary control by blowing | |
| GB1366704A (en) | Hollow cool'd blade for a gas | |
| US4648791A (en) | Rotor, consisting essentially of a disc requiring cooling and of a drum |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: UNITED STATES OF AMERICA, AS REPRESENTED BY THE UN Free format text: RE-RECORD OF INSTRUMENT RECORDED AUGUST 06, 1980, REEL 3788, FRAME 762 TO CORRECT PATENT NUMBER IN A PREVIOSLY RECORDED ASSIGNMENT;ASSIGNOR:C.A. PARSONS & COMPANY LIMITED;REEL/FRAME:003829/0215 Effective date: 19800702 |
|
| AS | Assignment |
Owner name: NORTHERN ENGINEERING INDUSTRIES PLC. Free format text: CHANGE OF NAME;ASSIGNOR:NORTHERN ENGINEERING INDUSTRIES LIMITED;REEL/FRAME:004101/0161 Effective date: 19821124 |