US1723104A - Elastic fluid turbine - Google Patents

Elastic fluid turbine Download PDF

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Publication number
US1723104A
US1723104A US731239A US73123924A US1723104A US 1723104 A US1723104 A US 1723104A US 731239 A US731239 A US 731239A US 73123924 A US73123924 A US 73123924A US 1723104 A US1723104 A US 1723104A
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US
United States
Prior art keywords
elastic fluid
condenser
turbine
branches
exhaust
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
Application number
US731239A
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English (en)
Inventor
Glenn B Warren
Harrison L Wirt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Priority to US731239A priority Critical patent/US1723104A/en
Priority to GB19151/25A priority patent/GB238222A/en
Priority to GB19150/25A priority patent/GB238221A/en
Priority to FR602594D priority patent/FR602594A/fr
Application granted granted Critical
Publication of US1723104A publication Critical patent/US1723104A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
    • F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
    • 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
    • F01D25/30—Exhaust heads, chambers, or the like

Definitions

  • GLENN B WARREN AND HARRISON L. WIR'I, OE! SCHENECTADY, NEW YORK, AS SIGNORS TO GENERAL ELECTRIC COMPANY,A CORPORATION OF NEW' YORK.
  • the present invention relates to elastic fluid turbines and especially to turbines of relatively large capacities operating condensin that is, exhausting into acondenser.
  • the elastic fluid leaves the last row of buckets with a certain velocity, this velocity being required in order for the elastic fluid to pass the last row of buckets, and the kinetic energy carried away by the elastic fluid stream by virtue of this velocity is termed, usually, the leaving loss.
  • the velocity and, hence, the leaving losses are decreased.
  • the permissible bucket ring diameters and bucket lengths are soon reached due to mechanical considerations so that with large machines the leaving loss may be considerable, the leaving velocity being usually of the order of 700 ft. per second.
  • Such a construction comprises essentially an exhaust housing which comprises first an annular pasageway having an admission end of a radial width between walls, that is a dif ference between the inner and outer *adii, equal substantially to the length of the buckets of the last bucket row and a length preferably throughout its entire circumference but at least throughout the major portion of sits circumference equal to at least twice the length of the buckets of the last bucket row followed by a plurality of branches which change gradually from curved or spurianniu lar passageways to approximately circular or rectangular passageways before reaching the condenser, such change taking place very gradually with a continual increase in cross sectional area and without changing substantially the direction of the fluid flow until the greater port-ion of the diffusion has taken place.
  • the 111- vention is shown as being carried out in con nection with an elastic fluid turbine having two vertical condensers, one placed at each side of the axis of the turbine, there being two branch passageways, one leading to each condenser, and such passageways bein substantially straight.
  • the primary object of our present invention is to provide an mproved construction whereby, while obtalning the advantages of the invention set forth in said Wirt application, we are enabled to utilize passageways which turn the exhaust fluid through substantially a right angle on its way to the condenser.
  • a further object of our invention is to provide an improved exhaust hood for an axial flow turbine exhausting into a horizontal condenser.
  • Fig. 1 is a perspective view of a turbine construction embodying our invention
  • Fig. 2 is a diagrammatic view illus trating the elastic fluid flow
  • 3 is a side elevation of the construct-ion illustrated in Fig. 1
  • Fig. 4 is an end view of the construction shown in Fig. 3.
  • 5 indicates the last row of buckets of an elastic fluid turbine 9, which turbine may be of any suitable type.
  • it is shown as being of the impulse type and as comprising a shaft 6 upon which are mounted bucket wheels 7 which rotate in stages formed by nozzle diaphrams 8.
  • T he bea *ing of shaft 6 at the low pressure end of the machine is indicated at 10 and the low pressure packing at 11.
  • the condenser for the turbine is indicated at 12. Only the low pressure end of the turbine is shown in the drawing. It will be understood that the particular structure indicated is only by way of example and is to be taken as ty cal of any suitable turbine structure to which our invention may be applied.
  • the elastic fluid is conveyed from the last bucket row 5 to condenser 12 by an exhaust housing which comprises first an annular OX- pandi'ng passageway 13 having an admission end of a radial width between walls, i. e., a difference between the inner and outer radii, equal substantially to the length of the buckets of the last bucket row and a length equal to at least twice the length of the buckets of the last bucket row, followed by three branches 14, 15 and 16 which convey the elastic fluid from annular passageway 13 to opening 17 of the condenser.
  • the branch 1s forms a passageway which conveys the elastic fluid from the lower part of annulus 13 to the condenser opening.
  • This passageway is smoothly curved downward with a gradual increase in cross section and is then cut off slant-ingly with respect to its center line and parallel to the axis of the turbine and discharges the stream at an angle of preferably about 30 degrees with the axis of the turbine.
  • suitable blades 18 having a curvature such as to turn the elastic fluid through the desired angle, and at the same time provide an increase in cross-sectional area and thereby obtain some additional diffusion.
  • Branches 15 and 16 provide two passageways which tr nd slightly to either side of the center line and serve to convey the elastic fluid from the upper portion (preferably about the upper two-thirds) of annulus 13 to the condenser. These passageways gracinally increase in area and extend in a substantially axial direction to a point directly over condenser opening 17 at which pointthey turn abruptly downward and lead into the condenser opening on each side of passageway l l.
  • blades 19 which serve to turn the elastic fluid through a right angle and direct it smoothly from flow in a substantially horizontal direction to flow in a substantially vertical direction.
  • the total length of the passageways formed by branches 15 and 16 is equal approximately to twice the diameter of the last stage wheel, and we have found by making the passageways of such length and providing an abrupt right angle turn with suitable blades for assisting in the turning of the elastic fluid that conversion of velocity into pressure can be effected.
  • F 2 shows diagrammatically the distribution of the flow in annulus 13 and the three branches 14%, 15 and 16, and the manner in which the blades 18 and 19 serve to change the direction of flow and it will be seen that flow at all times is in substantially straight lines.
  • the greatest pressure regain occurs in the first part of the diffuser passages due to the fact that the pressure and energy regain 1S proportional to the change in the squares of the velocity.
  • the annular passageway 13 followed by the substantially straight portions of the passageways provided by the branches enables the principal part of the diffusion to take place before the direction of flow of the elastic fluid is changed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
US731239A 1924-08-11 1924-08-11 Elastic fluid turbine Expired - Lifetime US1723104A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US731239A US1723104A (en) 1924-08-11 1924-08-11 Elastic fluid turbine
GB19151/25A GB238222A (en) 1924-08-11 1925-07-28 Improvements in and relating to elastic fluid turbines
GB19150/25A GB238221A (en) 1924-08-11 1925-07-28 Improvements in and relating to elastic fluid turbines
FR602594D FR602594A (fr) 1924-08-11 1925-08-06 Perfectionnements apportés aux turbines à fluide élastique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US731239A US1723104A (en) 1924-08-11 1924-08-11 Elastic fluid turbine

Publications (1)

Publication Number Publication Date
US1723104A true US1723104A (en) 1929-08-06

Family

ID=24938680

Family Applications (1)

Application Number Title Priority Date Filing Date
US731239A Expired - Lifetime US1723104A (en) 1924-08-11 1924-08-11 Elastic fluid turbine

Country Status (3)

Country Link
US (1) US1723104A (fr)
FR (1) FR602594A (fr)
GB (2) GB238221A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511130A (en) * 1942-07-16 1950-06-13 Rateau Soc Exhaust head of steam turbines
US4326832A (en) * 1978-11-14 1982-04-27 Tokyo Shibaura Denki Kabushiki Kaisha Exhaust outer casing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511130A (en) * 1942-07-16 1950-06-13 Rateau Soc Exhaust head of steam turbines
US4326832A (en) * 1978-11-14 1982-04-27 Tokyo Shibaura Denki Kabushiki Kaisha Exhaust outer casing

Also Published As

Publication number Publication date
GB238221A (en) 1926-03-25
GB238222A (en) 1926-10-28
FR602594A (fr) 1926-03-22

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