US3832087A - Axial turbine combined with reverse turbine - Google Patents
Axial turbine combined with reverse turbine Download PDFInfo
- Publication number
- US3832087A US3832087A US00406557A US40655773A US3832087A US 3832087 A US3832087 A US 3832087A US 00406557 A US00406557 A US 00406557A US 40655773 A US40655773 A US 40655773A US 3832087 A US3832087 A US 3832087A
- Authority
- US
- United States
- Prior art keywords
- turbine
- reverse
- main
- turbine housing
- reverse turbine
- 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
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
- F01D13/00—Combinations of two or more machines or engines
- F01D13/006—Combinations of two or more machines or engines one being a reverse turbine
-
- 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
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/02—Adaptations for driving vehicles, e.g. locomotives
- F01D15/04—Adaptations for driving vehicles, e.g. locomotives the vehicles being waterborne vessels
Definitions
- PAIE-NTEMuszmn SHEET 2 BF 2 ill AXIAL TURBINE COMBINED WITH REVERSE TURBINE BACKGROUND OF THE INVENTION For many installations, it is necessary to provide both forward and reverse turbines. In marine turbines, for example, the main turbine for forward propulsion must be accompanied by a reverse turbine to enable the ship to back, since it is normally not possible to reverse a single turbine. In such cases, the reverse turbine is usually located on an extension of the main turbine shaft at the outlet end of the main turbine. If the ship is provided with both high and low pressure turbines, the reverse turbine is normally positioned on the low pressure turbine so that it is in direct communication with the condenser.
- the present invention provides an arrangement for suspension of the reverse turbine housing within the outlet portion of the main turbine housing in combined turbine installations, in a manner which avoids the de' velopment of potentially damaging asymmetry and outof-true distortion from thermally induced movements in the turbine structure.
- a symmetrical system of supporting plates or vanes is mounted within, and secured to, the outlet portion of the main turbine housing.
- the reverse turbine housing, or its outlet end portion is attached to and suspended within the symmetrical plate system.
- a framework of connecting struts joins the reverse turbine stator housing and its outlet end portion symmetrically and circumferentially around their outer periphery.
- This arrangement provides symmetrical suspension of the reverse turbine, unaffected by thermal variations in the turbines, and, by structurally unloading the open inspection shaft of the main turbine, permits lighter construction and more freedom in the placement of this shaft, thereby making possible a shorter more compact turbine unit.
- FIG. 4 is a longitudinal sectional view of a modified embodiment of this invention.
- FIG. 5 is a cross-sectional view of the embodiment of FIG. 4.
- End portion 5 is provided with an opening and a seal for turbine shaft 21 and carries shaft bearing 6.
- Supporting struts 4 may bend with temperature fluctuations between reverse turbine housing 2 and outlet end piece 5, but their centering effect will be maintained by their symmetrical configuration.
- Bearing 6 for rotor shaft .21 may be reached, even while the turbine is in operation, through inspection chamber 14 on an open shaft 10, which is sealed against end portion 5 carrying bearing 6.
- This construction leaving shaft 10 unloaded, nonforce-absorbing, and connected to condenser wall 11 through expandable bellows 15, ensures that all forces and torque from the reverse turbine and rotor bearing 6 are transmitted to outlet portion 1 through support plates 3.
- the combined turbine unit is capable of making rapid load alterations without jeopardizing the centering between stationary and rotating parts, and stresses on the stationary parts are minimized.
- the vertical dividing plane of the turbine unit defined by flanges 12 between outlet portion 1 and con denser wall 11 and flanges 13 between open shaft 10 and outlet portion 5, is positioned so that turbine rotor shaft 21 can be lifted without disturbing condenser 11, open shaft 10 and inspection chamber 14.
- prior art construction required shaft 10 to be strong, heavy, and large enough to be load-bearing and to be mounted within outlet portion 1; the arrangement according to this invention permits lighter construction of shaft 10 and its placement in condenser portion 11, resulting in a considerably shorter, more compact turbine unit.
- FIGS. 4 and 5 differs from the construction of FIGS. l-3 in that outlet end portion 5 rather than reverse turbine housing 2 is suspended in support plates 3.
- the framework of struts 4 still symmetrically connects elements 2 and 5.
- FIGS. 4 and 5 Since end portion absorbs the side forces on hearing 6, the arrangement of FIGS. 4 and 5 gives more direct support against these side forces, which are transmitted through support plates 3 to outer supports 17 positioned directly below plate 3 and resting against the foundation of the turbine unit.
- FIGS. 4 and 5 correspond to those previously described for FIGS. l3 and are designated by the same reference characters.
- the reverse turbine housing being formed of a major stator portion and an outlet end portion, said major portion and said outlet end portion circumferentially connected by a symmetrical framework of support struts;
- Main axial turbine combined with reverse turbine according to claim 1 further comprising an inspection chamber mounted on said outlet end portion of the reverse turbine housing, said inspection chamber being in communication with the outside through an open shaft flexibly attached to the outlet portion of the main turbine' housing by expandable connecting means.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Control Of Turbines (AREA)
Abstract
A main axial turbine combined with a reverse turbine, the rotors of both turbines being mounted on the same common rotor shaft, with the reverse turbine housing suspended coaxially within the outlet portion of the main axial turbine by a symmetrical system of support plates or vanes, is disclosed.
Description
Lohonen et a1.
1451 Aug. 27, 1974- AXIAL TURBINE COMBINED WITH REVERSE TURBINE Inventors: Paavo Lohonen; 010i Karlsson, both of Finspong, Sweden Assignee: Stal Laval Turbin AB, Finspong,
Sweden Filed: Oct. 15, 1973 Appl. No.: 406,557
Foreign Application Priority Data Oct. 20, 1972 Sweden 13563/72 u.s. c1. .Q 415/153, 415/219 R 1m. (:1. F0ld 1/30, F0111 1/04 Field of Search 415/153, 152, 194, 198, 415/219 R [56] References Cited UNITED STATES PATENTS 725,184 4/1903 Webster 415/153 1,243,131 10/1917 Belluzzo 415/153 1,315,153
9/1919 Peterson 415/153 Primary ExaminerHenry F. Raduazo 711 ABSTRACT A main axial turbine combined with a reverse turbine, the rotors-of both turbines being mounted on the same common rotor shaft, with the reverse turbine housing suspended coaxially within the outlet portion of the main axial turbine by a symmetrical system of support plates or vanes, is disclosed.
5 Claims, 5 Drawing Figures PATENTEnauszvxsm SHEET 1 BF 2 Fig. I
PAIE-NTEMuszmn SHEET 2 BF 2 ill AXIAL TURBINE COMBINED WITH REVERSE TURBINE BACKGROUND OF THE INVENTION For many installations, it is necessary to provide both forward and reverse turbines. In marine turbines, for example, the main turbine for forward propulsion must be accompanied by a reverse turbine to enable the ship to back, since it is normally not possible to reverse a single turbine. In such cases, the reverse turbine is usually located on an extension of the main turbine shaft at the outlet end of the main turbine. If the ship is provided with both high and low pressure turbines, the reverse turbine is normally positioned on the low pressure turbine so that it is in direct communication with the condenser.
Prior art arrangements for combined forward and reverse turbines, have the reverse turbine housing suspended from an open inspection shaft arranged diametrically in the outlet portion of the main turbine housing. This requires that the inpsection shaft be constructed of sufficient strength and size to bear the load, which results in a rather large and bulky installation.
SUMMARY OF THE INVENTION The present invention provides an arrangement for suspension of the reverse turbine housing within the outlet portion of the main turbine housing in combined turbine installations, in a manner which avoids the de' velopment of potentially damaging asymmetry and outof-true distortion from thermally induced movements in the turbine structure.
Specifically, according to the invention, a symmetrical system of supporting plates or vanes is mounted within, and secured to, the outlet portion of the main turbine housing. In turn, the reverse turbine housing, or its outlet end portion, is attached to and suspended within the symmetrical plate system. A framework of connecting struts joins the reverse turbine stator housing and its outlet end portion symmetrically and circumferentially around their outer periphery.
This arrangement provides symmetrical suspension of the reverse turbine, unaffected by thermal variations in the turbines, and, by structurally unloading the open inspection shaft of the main turbine, permits lighter construction and more freedom in the placement of this shaft, thereby making possible a shorter more compact turbine unit.
These and other features of this invention will be fully described with reference to the accompanying drawings, and the concepts herein disclosed will be defined by the appended claims.
DRAWINGS FIG. 4 is a longitudinal sectional view of a modified embodiment of this invention; and
FIG. 5 is a cross-sectional view of the embodiment of FIG. 4.
DESCRIPTION I portion 1 of the main turbine and which maintain housing 2 in coaxial relationship to outlet portion 1. With this arrangement, clearly seen in FIGS. 2 & 3, temperature differences between reverse turbine housing 2 and outlet portion lwill cause plates 3 to bend without disturbing their centering effect, by virtue of the systems symmetry.
On reverse turbine housing 2, a framework of struts or stays 4, arranged circumfe'rentially, is connected symmetrically and supportively to outlet end portion 5. End portion 5 is provided with an opening and a seal for turbine shaft 21 and carries shaft bearing 6. Supporting struts 4 may bend with temperature fluctuations between reverse turbine housing 2 and outlet end piece 5, but their centering effect will be maintained by their symmetrical configuration.
Bearing 6 for rotor shaft .21 may be reached, even while the turbine is in operation, through inspection chamber 14 on an open shaft 10, which is sealed against end portion 5 carrying bearing 6. This construction, leaving shaft 10 unloaded, nonforce-absorbing, and connected to condenser wall 11 through expandable bellows 15, ensures that all forces and torque from the reverse turbine and rotor bearing 6 are transmitted to outlet portion 1 through support plates 3. Thus, the combined turbine unit is capable of making rapid load alterations without jeopardizing the centering between stationary and rotating parts, and stresses on the stationary parts are minimized.
The vertical dividing plane of the turbine unit, defined by flanges 12 between outlet portion 1 and con denser wall 11 and flanges 13 between open shaft 10 and outlet portion 5, is positioned so that turbine rotor shaft 21 can be lifted without disturbing condenser 11, open shaft 10 and inspection chamber 14. As has been noted above, prior art construction required shaft 10 to be strong, heavy, and large enough to be load-bearing and to be mounted within outlet portion 1; the arrangement according to this invention permits lighter construction of shaft 10 and its placement in condenser portion 11, resulting in a considerably shorter, more compact turbine unit.
The alternate embodiment shown in FIGS. 4 and 5 differs from the construction of FIGS. l-3 in that outlet end portion 5 rather than reverse turbine housing 2 is suspended in support plates 3. The framework of struts 4 still symmetrically connects elements 2 and 5.
Since end portion absorbs the side forces on hearing 6, the arrangement of FIGS. 4 and 5 gives more direct support against these side forces, which are transmitted through support plates 3 to outer supports 17 positioned directly below plate 3 and resting against the foundation of the turbine unit.
All other elements in FIGS. 4 and 5 correspond to those previously described for FIGS. l3 and are designated by the same reference characters.
We claim:
1. A main axial turbine combined with a reverse turbine, the rotor of the reverse turbine being operatively mounted on the same shaft as, and adjacent in axial flow direction to, the rotor of the main turbine, with the reverse turbine housing suspended within and coaxial with the outlet portion of the main turbine housing, and comprising:
the reverse turbine housing being formed of a major stator portion and an outlet end portion, said major portion and said outlet end portion circumferentially connected by a symmetrical framework of support struts;
said outlet end portion of the reverse turbine housing carrying therein the bearing which journals the outlet end of the common turbine rotor shaft; and
a symmetrical system of plates, connected to the inside of the outlet portion of the main turbine housing and supportively suspending the reverse turbine housing within said system.
2. Main axial turbine combined with reverse turbine in accordance with claim 1, wherein said symmetrical system of plates supportively suspend said major portion of the reverse turbine housing.
3. Main axial turbine combined with reverse turbine according to claim 1, wherein said symmetrical system of plates supportively suspend said outlet end portion of the reverse turbine housing.
4. Main axial turbine combined with reverse turbine according to claim 1, further comprising an inspection chamber mounted on said outlet end portion of the reverse turbine housing, said inspection chamber being in communication with the outside through an open shaft flexibly attached to the outlet portion of the main turbine' housing by expandable connecting means.
5. Main axial turbine combined with reverse turbine according to claim 1, wherein the inlet tube of the reverse turbine passes through the wall of the outlet portion of the main turbine housing, said inlet tube communicating with and being flexibly attached to said major portion of the reverse turbine housing by a telescopic sealing connection.
Claims (5)
1. A main axial turbine combined with a reverse turbine, the rotor of the reverse turbine being operatively mounted on the same shaft as, and adjacent in axial flow direction to, the rotor of the main turbine, with the reverse turbine housing suspended within and coaxial with the outlet portion of the main turbine housing, and comprising: the reverse turbine housing being formed of A major stator portion and an outlet end portion, said major portion and said outlet end portion circumferentially connected by a symmetrical framework of support struts; said outlet end portion of the reverse turbine housing carrying therein the bearing which journals the outlet end of the common turbine rotor shaft; and a symmetrical system of plates, connected to the inside of the outlet portion of the main turbine housing and supportively suspending the reverse turbine housing within said system.
2. Main axial turbine combined with reverse turbine in accordance with claim 1, wherein said symmetrical system of plates supportively suspend said major portion of the reverse turbine housing.
3. Main axial turbine combined with reverse turbine according to claim 1, wherein said symmetrical system of plates supportively suspend said outlet end portion of the reverse turbine housing.
4. Main axial turbine combined with reverse turbine according to claim 1, further comprising an inspection chamber mounted on said outlet end portion of the reverse turbine housing, said inspection chamber being in communication with the outside through an open shaft flexibly attached to the outlet portion of the main turbine housing by expandable connecting means.
5. Main axial turbine combined with reverse turbine according to claim 1, wherein the inlet tube of the reverse turbine passes through the wall of the outlet portion of the main turbine housing, said inlet tube communicating with and being flexibly attached to said major portion of the reverse turbine housing by a telescopic sealing connection.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE13563/72A SE369091B (en) | 1972-10-20 | 1972-10-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3832087A true US3832087A (en) | 1974-08-27 |
Family
ID=20297608
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00406557A Expired - Lifetime US3832087A (en) | 1972-10-20 | 1973-10-15 | Axial turbine combined with reverse turbine |
Country Status (5)
Country | Link |
---|---|
US (1) | US3832087A (en) |
JP (1) | JPS4973503A (en) |
DE (1) | DE2350464C3 (en) |
GB (1) | GB1438582A (en) |
SE (1) | SE369091B (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4764083A (en) * | 1985-08-19 | 1988-08-16 | Hitachi, Ltd. | Discharge ring supporting structure of adjustable-blade axial-flow turbine |
US5083040A (en) * | 1990-06-07 | 1992-01-21 | General Electric Company | Integrated turbine generator |
US20110000222A1 (en) * | 2007-08-31 | 2011-01-06 | General Electric Company | Gas turbine rotor-stator support system |
US9494044B1 (en) * | 2014-04-02 | 2016-11-15 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Turbo-electric compressor/generator using Halbach arrays |
CN107725119A (en) * | 2017-12-06 | 2018-02-23 | 中国船舶重工集团公司第七0三研究所 | A kind of nested type packing balanced structure of high-pressure chamber |
CN107956515A (en) * | 2017-12-06 | 2018-04-24 | 中国船舶重工集团公司第七0三研究所 | A kind of double shell cylinder marine turbing ahead and astern cylinder closes cylinder integral structure |
CN114542212A (en) * | 2022-03-09 | 2022-05-27 | 中国船舶重工集团公司第七0三研究所 | Novel marine steam turbine cylinder of backing a car |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US725184A (en) * | 1903-01-13 | 1903-04-14 | Albert Cromwell | Steam-turbine. |
US1243131A (en) * | 1913-01-23 | 1917-10-16 | Giuseppe Belluzzo | Steam-turbine. |
US1315153A (en) * | 1919-09-02 | Reversing-tttrbihe |
-
1972
- 1972-10-20 SE SE13563/72A patent/SE369091B/xx unknown
-
1973
- 1973-10-08 DE DE2350464A patent/DE2350464C3/en not_active Expired
- 1973-10-15 US US00406557A patent/US3832087A/en not_active Expired - Lifetime
- 1973-10-17 GB GB4836273A patent/GB1438582A/en not_active Expired
- 1973-10-17 JP JP48116747A patent/JPS4973503A/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1315153A (en) * | 1919-09-02 | Reversing-tttrbihe | ||
US725184A (en) * | 1903-01-13 | 1903-04-14 | Albert Cromwell | Steam-turbine. |
US1243131A (en) * | 1913-01-23 | 1917-10-16 | Giuseppe Belluzzo | Steam-turbine. |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4764083A (en) * | 1985-08-19 | 1988-08-16 | Hitachi, Ltd. | Discharge ring supporting structure of adjustable-blade axial-flow turbine |
US5083040A (en) * | 1990-06-07 | 1992-01-21 | General Electric Company | Integrated turbine generator |
US20110000222A1 (en) * | 2007-08-31 | 2011-01-06 | General Electric Company | Gas turbine rotor-stator support system |
US9494044B1 (en) * | 2014-04-02 | 2016-11-15 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Turbo-electric compressor/generator using Halbach arrays |
CN107725119A (en) * | 2017-12-06 | 2018-02-23 | 中国船舶重工集团公司第七0三研究所 | A kind of nested type packing balanced structure of high-pressure chamber |
CN107956515A (en) * | 2017-12-06 | 2018-04-24 | 中国船舶重工集团公司第七0三研究所 | A kind of double shell cylinder marine turbing ahead and astern cylinder closes cylinder integral structure |
CN107725119B (en) * | 2017-12-06 | 2024-01-12 | 中国船舶重工集团公司第七0三研究所 | Nested vapor seal balance structure of high-pressure chamber |
CN114542212A (en) * | 2022-03-09 | 2022-05-27 | 中国船舶重工集团公司第七0三研究所 | Novel marine steam turbine cylinder of backing a car |
Also Published As
Publication number | Publication date |
---|---|
DE2350464C3 (en) | 1979-11-29 |
DE2350464A1 (en) | 1974-05-02 |
SE369091B (en) | 1974-08-05 |
JPS4973503A (en) | 1974-07-16 |
GB1438582A (en) | 1976-06-09 |
DE2350464B2 (en) | 1979-03-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4360314A (en) | Liquid metal pump | |
KR101437172B1 (en) | Turbine rotor support apparatus and system | |
US4321007A (en) | Outer case cooling for a turbine intermediate case | |
US9291068B2 (en) | Low pressure steam turbine seal arrangement | |
US2744722A (en) | Turbine bearing support | |
EP1108858B1 (en) | Double wall bearing cone | |
US3773431A (en) | Multiple shell turbine casing for high pressures and high temperatures | |
US4487014A (en) | Gas generator and turbine unit | |
US3832087A (en) | Axial turbine combined with reverse turbine | |
US20190293117A1 (en) | Closed Cycle Heat Engine | |
US2925954A (en) | Compressor group with intercooler | |
JPH0457849B2 (en) | ||
CA2755624C (en) | Turbine shaft supporting structure | |
US4232993A (en) | Low pressure casing for a steam turbine | |
US6213710B1 (en) | Method and apparatus for thrust compensation on a turbomachine | |
US3937589A (en) | High pressure double flow turbine construction | |
US3535540A (en) | Hydroelectric bulb type set having a heat expansion compensator for the upstream support | |
US3844675A (en) | Plural shell axial turbine for operation with high pressure, high temperature steam | |
US2655307A (en) | Gas turbine rotor arrangement | |
US3311343A (en) | Elastic fluid apparatus | |
US3194744A (en) | Closed cycle gas turbine system | |
US4427337A (en) | Bearing for liquid metal pump | |
US2503914A (en) | Elastic fluid turbine casing | |
US3148282A (en) | Integral turbine-generator set | |
US3045895A (en) | Gas circulatory means |