DE1120469B - Device for limiting the maximum speed of a compressed air turbine impeller by means of predetermined breaking points - Google Patents

Device for limiting the maximum speed of a compressed air turbine impeller by means of predetermined breaking points

Info

Publication number
DE1120469B
DE1120469B DER28398A DER0028398A DE1120469B DE 1120469 B DE1120469 B DE 1120469B DE R28398 A DER28398 A DE R28398A DE R0028398 A DER0028398 A DE R0028398A DE 1120469 B DE1120469 B DE 1120469B
Authority
DE
Germany
Prior art keywords
limiting
compressed air
maximum speed
air turbine
predetermined breaking
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.)
Pending
Application number
DER28398A
Other languages
German (de)
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.)
Lucas Support Services Ltd
Original Assignee
Rotax Ltd
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 Rotax Ltd filed Critical Rotax Ltd
Publication of DE1120469B publication Critical patent/DE1120469B/en
Pending legal-status Critical Current

Links

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
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F01D21/04—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to undesired position of rotor relative to stator or to breaking-off of a part of the rotor, e.g. indicating such position
    • F01D21/045—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to undesired position of rotor relative to stator or to breaking-off of a part of the rotor, e.g. indicating such position special arrangements in stators or in rotors dealing with breaking-off of part of rotor
    • 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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/3023—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Tires In General (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Die Erfindung betrifft eine Einrichtung zur Begrenzung der Höchstdrehzahl eines Druckluftturbinen-Schaufelrades mittels Sollbruchstellen in der Beschaufelung, die bei bestimmter Überdrehzahl infolge der Zentrifugalkraft brechen, so daß die Schaufeln vom Rade abfliegen.The invention relates to a device for limiting the maximum speed of a compressed air turbine impeller by means of predetermined breaking points in the blading, which at certain overspeed as a result of the Break centrifugal force so that the blades fly off the wheel.

Ziel solcher Einrichtung ist bekanntlich, daß bei Überdrehzahl alle Schafein gleichzeitig abfliegen, daß also das Rad weder weiter beschleunigt wird noch mit Unwucht, also mit Erschütterung, weiterläuft.The aim of such a device is known that all sheep fly off at the same time when overspeed, that so the wheel is neither accelerated further nor continues to run with imbalance, i.e. with vibration.

Bei der bekannten Turbine sind die Schaufeln gegen die Fliehkraft mittels je eines Scherstiftes gehalten, und ist dieser so bemessen, daß er bei der bestimmten Überdrehzahl bricht. Es sind also zahlreiche Sollbruchstellen, nämlich so viele wie Schaufein, vorhanden; da die Stifte nur schwer so genau kalibriert werden können, daß sie alle gleichzeitig brechen, so wird jenes Ziel, der gleichzeitige Abwurf aller Schaufeln, nicht mit der erwünschten Genauigkeit erreicht. aoIn the known turbine, the blades are held against the centrifugal force by means of a shear pin, and is this dimensioned so that it breaks at the certain overspeed. So there are numerous Predetermined breaking points, namely as many as Schaufein, available; because the pins are difficult to be so accurate can be calibrated so that they all break at the same time, so that goal, simultaneous dropping, becomes of all blades, not achieved with the desired accuracy. ao

Die Erfindung besteht nun darin, daß die Schaufeln gegen die Fliehkraft nur von einem Deckband gehalten werden und daß die Bruchstelle oder Bruchstellen in diesem Deckband angeordnet ist bzw. sind. Sie ergibt die Vorteile, daß sie erstens die Zahl der Sollbruchsteilen vermindert, also die Kalibrierung erleichtert und zweitens mit Sicherheit alle Schaufeln gleichzeitig abfliegen läßt.The invention consists in the fact that the blades are only held against the centrifugal force by a shroud and that the break point or break points is or are arranged in this shroud. she gives the advantage that, firstly, it reduces the number of predetermined breaking parts, that is to say facilitates calibration and secondly, let all the blades fly off at the same time with certainty.

Die Zeichnung zeigt ein Ausführungsbeispiel. Darin bedeutet α die Laufradscheibe, b und b' Stifte, welche in Löcher der Radscheibe, der Schaufeln und des Deckbandes eintauchen und die Schaufeln in Achsrichtung und in Umfangsrichtung festhalten, c die Schaufeln, d das Deckband und e eine Aussparung oder Aussparungen im Deckband, an der bzw. an denen der Bruch eintreten soll.The drawing shows an embodiment. Here, α means the impeller disk, b and b ' pins, which dip into holes in the wheel disk, the blades and the shroud and hold the blades in the axial direction and in the circumferential direction, c the blades, d the shroud and e a recess or recesses in the shroud, at which or where the break is to occur.

Claims (1)

PATENTANSPRUCH:PATENT CLAIM: Einrichtung zur Begrenzung der Höchstdrehzahl eines Druckluftturbinen-Schaufelrades mittels Einrichtung zur Begrenzung der Höchstdrehzahl eines Druckluftturbinen-Schaufelrades mittels SollbruchstellenDevice for limiting the maximum speed of a compressed air turbine impeller by means of Device for limiting the maximum speed of a compressed air turbine impeller by means of predetermined breaking points Anmelder:
Rotax Limited, LondonApplicant:
Rotax Limited, London Vertreter: Dr.-Ing. Dr. jur. O. Zeller, Patentanwalt, Hamburg 1, Große Allee 30Representative: Dr.-Ing. Dr. jur. O. Zeller, patent attorney, Hamburg 1, Grosse Allee 30 Beanspruchte Priorität:Claimed priority: Großbritannien vom 27. Juli 1959Great Britain July 27, 1959 und 14. Juni 1960 (Nr. 25 636)and June 14, 1960 (No. 25 636)
DER28398A 1959-07-27 1960-07-23 Device for limiting the maximum speed of a compressed air turbine impeller by means of predetermined breaking points Pending DE1120469B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25636/59A GB895510A (en) 1959-07-27 1959-07-27 Air driven turbines

Publications (1)

Publication Number Publication Date
DE1120469B true DE1120469B (en) 1961-12-28

Family

ID=10230871

Family Applications (1)

Application Number Title Priority Date Filing Date
DER28398A Pending DE1120469B (en) 1959-07-27 1960-07-23 Device for limiting the maximum speed of a compressed air turbine impeller by means of predetermined breaking points

Country Status (3)

Country Link
US (1) US3051440A (en)
DE (1) DE1120469B (en)
GB (1) GB895510A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3271005A (en) * 1964-03-02 1966-09-06 Sundstrand Corp Mechanical overspeed prevention device
US4509896A (en) * 1982-03-01 1985-04-09 Tech Development Inc. Turbine rotor
US4507047A (en) * 1983-02-28 1985-03-26 Tech Development Inc. Hoop turbine
US5178517A (en) * 1990-08-27 1993-01-12 Ed Reinhorn Turbine bucket rotor construction
SE528115C2 (en) 2004-11-23 2006-09-05 Atlas Copco Tools Ab Axial flow turbine with overhead protection device

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE342900C (en) * 1920-01-08 1921-10-26 Schneider & Cie Soc Head ring for the blades of steam or gas turbines
US1469045A (en) * 1922-04-18 1923-09-25 Westinghouse Electric & Mfg Co Elastic fluid turbine
US1634897A (en) * 1924-11-11 1927-07-05 Westinghouse Electric & Mfg Co Turbine
GB532372A (en) * 1938-08-27 1941-01-22 British Thomson Houston Co Ltd Improvements in and relating to elastic fluid turbines
US2277484A (en) * 1939-04-15 1942-03-24 Westinghouse Electric & Mfg Co Turbine blade construction
US2310412A (en) * 1941-03-08 1943-02-09 Westinghouse Electric & Mfg Co Vibration dampener
US2349187A (en) * 1941-03-08 1944-05-16 Westinghouse Electric & Mfg Co Vibration dampener
DE837495C (en) * 1950-05-05 1952-04-28 Eisen & Stahlind Ag Vane fastening intended for hydraulic converters with an axially flowed through rotor or guide vane ring
US2965355A (en) * 1956-01-17 1960-12-20 United Aircraft Corp Turbine disc burst inhibitor
US2942843A (en) * 1956-06-15 1960-06-28 Westinghouse Electric Corp Blade vibration damping structure
FR1223925A (en) * 1959-05-12 1960-06-21 Gen Electric Speed limitation device for turbines

Also Published As

Publication number Publication date
US3051440A (en) 1962-08-28
GB895510A (en) 1962-05-02

Similar Documents

Publication Publication Date Title
DE1120469B (en) Device for limiting the maximum speed of a compressed air turbine impeller by means of predetermined breaking points
GB1177917A (en) Helicopter Rotor Blades
US2490470A (en) Aerial projectile
DE840930C (en) Device for measuring the load on conveyor ropes
DE654946C (en) Toy sling arrow
DE901387C (en) Disc for top games
DE2051074C3 (en) Device for operational testing of a centrifugal switch
DE873270C (en) Device for braking electric motors
DE357731C (en) Entertainment and educational game with a falling ball
DE607323C (en) Centrifugal governor for electrically operated centrifuges
SHRIVER Fully proceduralized job performance aids: Guidance for performing behavioral analyses of tasks(education to improve human performance in aircraft maintenance)[Final Report, 1 May 1971- 3 Feb. 1975]
Lehman Helmets and head protection in USAF ejections 1968-1972
GB998064A (en) Improvements in or relating to dart games
FR2321678A1 (en) Helicopter mounted torpedo releasing device - includes tear strip which ensures initial axial rotation at start of free fall
DE1473728C3 (en) Arrangement for measuring static gas pressures
CROSBIE The centrifuge method of dynamic flight simulation(Evolution of centrifuge method of dynamic flight simulation- modernization program for improved safety, simplicity, and versatility)
BROWN Description of the kaman uh-2 a rescue and liaison helicopter
DE726613C (en) Towing connection of a rotary wing glider with a tractor
DE892730C (en) Spool carrier
BARANOVSKIY et al. The interaction of the analyzers under flight conditions on airplanes and spaceships(Interaction of visual, vestibular, and motor sense organs under simulated flight conditions)
KHILOV et al. Changes in the functional state of the auditory analysor as a function of the flight duration and the task performed(Auditory analysor functional changes in flight crews as result of long flights and emotional stress, noting cumulative effects of various harmful factors)
MITTAG et al. Artificial icing tests AH-1 G helicopter[Final Report, 22 Oct. 1973- 2 Apr. 1974]
JEPSON Variables affecting permissible take-off procedures of twin-engine helicopters
CLARK et al. Investigation of the use of vectored thrust during carrier landings(Carrier landing characteristics of vectored- thrust aircraft obtained in piloted fixed-base flight simulator studies)
GB597682A (en) Improvements in or relating to flying tops or like toys