WO2015026429A1 - Système de lubrification d'urgence - Google Patents

Système de lubrification d'urgence Download PDF

Info

Publication number
WO2015026429A1
WO2015026429A1 PCT/US2014/042970 US2014042970W WO2015026429A1 WO 2015026429 A1 WO2015026429 A1 WO 2015026429A1 US 2014042970 W US2014042970 W US 2014042970W WO 2015026429 A1 WO2015026429 A1 WO 2015026429A1
Authority
WO
WIPO (PCT)
Prior art keywords
lubricating oil
supply line
lubricating
oil
reserve
Prior art date
Application number
PCT/US2014/042970
Other languages
English (en)
Inventor
Megan BASTIAN
Original Assignee
United Technologies Corporation
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 United Technologies Corporation filed Critical United Technologies Corporation
Priority to EP14838757.4A priority Critical patent/EP3036470A4/fr
Publication of WO2015026429A1 publication Critical patent/WO2015026429A1/fr
Priority to US14/926,328 priority patent/US20160047281A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/16—Controlling lubricant pressure or quantity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N29/00—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems
    • F16N29/02—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems for influencing the supply of lubricant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/18—Indicating or safety devices
    • F01M1/20—Indicating or safety devices concerning lubricant pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/02—Arrangements of lubricant conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N17/00—Lubrication of machines or apparatus working under extreme conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M2011/0095—Supplementary oil tank

Definitions

  • the present disclosure relates generally to lubrication systems . More particularly, the present disclosure relates to an emergency lubrication system.
  • Lubrication systems such as those used in aircraft gas turbine engines, supply lubricant to bearings, gears and other engine components that require lubrication.
  • the lubricant typically oil, cools the components and protects them from wear.
  • a typical oil lubrication system includes conventional components such as an oil tank, pump, filter and oil supply conduits.
  • oilssupply to the lubricated component may be disrupted, resulting in potentially irreparable damage to the component and undesirable corollary consequences.
  • an engine oil pump fails or a supply conduit develops a severe leak the resulting loss of oil pressure could disable the engine by causing overheating and/or seizure of the bearings that support the engine rotor.
  • An aircraft engine that becomes disabled in flight is obviously a concern, especially for a single engine military aircraft operating in hostile airspace.
  • a lubrication system may be a lubrication oil system of an aircraft such as a helicopter and/or the lubrication of an engine system component and/or the helicopter rotor assembly.
  • a redundant lubricating system may include a reserve lubricating oil tank coupled to a distal portion of a lubricating oil main supply line, at least one supply line coupled to the reserve lubricating oil tank, wherein the supply line couples the reserve lubricating oil tank to at least one engine component, such as a bearing assembly.
  • the reserve lubricating oil tank may be configured to cycle lubricating oil from the lubricating oil main supply line through the reserve lubricating oil tank to the supply line.
  • the lubricating oil may be provided to the engine components, during normal operation based on an oil pressure of the lubricating oil main supply line.
  • the system may include a check valve interposed between the reserve lubricating oil tank and a compressed air source.
  • the system may include a lubricating oil pressure sensor associated with the main supply line.
  • the lubricating oil pressure sensor may be configured to sense the oil pressure of the lubricating oil main supply line and/or a location associated with the lubricating oil main supply line.
  • a check valve may permit compressed air from a compressed air source to be delivered to the reserve tank in response to the lubricating oil pressure sensor reading.
  • a one way valve may be interposed between the reserve lubricating oil tank and the lubricating oil main supply line.
  • FIG. 1 illustrates a representative flow diagram of lubricating oil flow in response to normal operating conditions in accordance with various embodiments
  • FIG. 2 illustrates a representative flow diagram of lubricating oil flow in response to emergency conditions in accordance with various embodiments
  • FIG. 3 illustrates a process for providing lubricating oil according to various embodiments.
  • a representative lubricating oil main supply line 115 is depicted.
  • This oil main supply line 1 15 may be for a vehicle, such as an aircraft.
  • main supply line 1 15 may supply lubricating oil to a helicopter engine or aircraft engine.
  • Oil supply line 115 delivers oil to elements of a gas turbine engine, such as bearings assemblies generally designated as 1 and 3, and to a reserve tank 120. Bearing assemblies, in general, reduce friction between a rotating engine element and stationary engine components.
  • Oil pump 130 driven by the engine (not shown), pumps oil from a sump/oil supply reservoir 125 through main oil supply line 115 to effect lubrication of the engine system components of the gas turbine engine (e.g. bearings assemblies 1 , 3 and roller bearing 10, and/or the like).
  • Reserve tank 120 may be empty (and/or less than full) of oil on engine start-up. Reserve tank 120 may be located towards and/or at the distal end of the path of lubricating oil main supply line 1 15. As lubricating oil is delivered through main supply line 1 1 under pressure, reserve tank 120 may gradually fill with lubricating oil. Stated another way, as lubricating oil is delivered through main supply line 1 15 under pressure, the amount of lubricating oil in reserve tank 120 tends to increase. This filling of reserve tank 120 may occur in concert with lubricating oil being delivered to bearings assemblies 1, 3. As reserve tank 120 fills and pressure within reserve tank 120 increases, oil may be delivered from reserve tank 120 through supply lines 135 and 145 to bearings assemblies 1, 3 respectively.
  • This delivery circulates the lubricating oil from reserve tank 120.
  • lubricating oil is not trapped in reserve tank 120 until needed.
  • Reserve oil is consistently being circulated via supply lines 135 and 145.
  • this system continuously circulates oil through and from a reserve tank. "Continuously” in this context may refer exchanging/cycling lubricating oil in the reserve tank 120 without trapping the lubricating oil in the reserve tank 120 for an extended period of time. Trapping oil in a reserve tank may degrade the quality of the oil, lead to build up in lines, and may be otherwise undesirable. Additionally, no additional force application, such as through compressed air or additional pump is used to circulate oil from reserve tank 120 during normal operating conditions.
  • Normal operating conditions as used herein may be when main supply line 1 15 comprises adequate oil pressure to deliver lubricating oil to the system.
  • an air check value 150 coupled to a compressed air supply 155 may be in a closed position and/or restrict compressed air in the compressed air supply 155 from entering the reserve tank 120.
  • a valve, such as a one-way valve 160, may be located between a distal end of main supply line 1 15 and reserve lubricating oil tank 120, such that lubricating oil delivered by main supply line 1 15 may not exit reserve tank 120 via main supply line 1 15.
  • a sensor such as oil pressure sensor 170, may be located along and/or coupled to main supply line 1 15 to measure and/or determine that the oil pressure in main supply line 1 15 is above a predetermined normal operation oil pressure threshold. In the event that the main lubricating oil supply line 1 1 5. pump 130 or other elements of the normal lubricating system should be damaged or fail for any reason, the various bearings, such as bearing assemblies 1 , 3 of the engine would be starved for oil and catastrophic failure of the engine may occur. This is undesirable.
  • Integrated emergency lubrication system generally designated as system 200 in FIG.
  • the predetermined amount of time may be any suitable amount of time. According to various embodiments, the predetermined amount of time is between about 15 and 180 seconds, between about 4 and 8 minutes, and between about 1 and 9 minutes. In various embodiments, the predetermined amount of operational time for uninterrupted lubrication of emergency oil during emergency conditions is six minutes.
  • the predetermined rate of power may be any suitable rate of power.
  • the predetermined rate of power is between about 50-90% normal operational power, between about 60-85% normal operational power, and between about 70-80%) normal operational power. According to various embodiments, the predetermined rate of power is full normal operational power and/or between about 60-100%) normal operational power. In various embodiments, the predetermined rate of power is about 75% normal operational power. During that time, (e.g. emergency oil conditions), the engine's operator can reduce power to the engine and take other appropriate emergency measures.
  • the predetermined rate of power is between about 50-90% normal operational power, between about 60-85% normal operational power, and between about 70-80%) normal operational power. According to various embodiments, the predetermined rate of power is full normal operational power and/or between about 60-100%) normal operational power. In various embodiments, the predetermined rate of power is about 75% normal operational power.
  • the engine's operator can reduce power to the engine and take other appropriate emergency measures.
  • FIG. 2 depicts loss of lubricating oil flow through main lubricating oil supply line 1 15. This loss of lubricating oil delivery is depicted by an "X" over the lubricating oil paths from main supply line 1 15 to bearings assemblies 1 and 3, roller bearing 10 and through lubricating oil supply line 1 15 itself.
  • the loss of one or more path of lubricating oil delivery may be associated with an emergency oil condition. During loss of lubricating oil delivery, oil is not supplied to bearings assemblies 1 and 3, roller bearing 10 and/or a decreased amount of oil is being supplied to bearings assemblies 1 and 3, roller bearing 10 via the main oil supply line.
  • Compressed air from compressed air supply 155 may provide the force/pressure to deliver lubricating oil in reserve tank 120 to elements of engine, such as bearings assemblies 1 and 3.
  • the pressure of the lubricating oil supplied is less than about 60 pound-force per square inch gauge (PSIG) (4.136854368 bar).
  • PSIG pound-force per square inch gauge
  • buffer air may pressurize the reserve tank 120.
  • lubricating oil may be delivered through supply lines 135 and 145 to bearing assemblies 1 and 3.
  • lubricating oil may be delivered from reserve tank 120 to bearing assemblies 1 and 3 in a jet or mist.
  • compressed air and/or buffer air may be used during emergency conditions but jet and/or mist delivery is not intended for long term use in normal operating conditions.
  • compressed air is not used to deliver lubricating oil from the reserve tank 120 during normal operating conditions. In this way, inefficient use of compressed/buffer air is reduced.
  • a piston is not utilized to deliver emergency oil to various engine components.
  • the size of the reserve tank 120 may affect the length of time lubricating oil is applied to engine elements during an emergency oil condition.
  • Reserve tank 120 may be sized to accommodate any desired length of time to provide lubricating oil during emergency conditions.
  • Lubricating oil may be delivered to bearing assemblies 1 and 3 substantially simultaneously.
  • a single port in reserve tank 120 may split and form an inlet to each supply line 135 and supply line 145.
  • supply line 135 and supply line 145 may be individually coupled to reserve tank 120, such as by two distinct couplings.
  • the volume of reserve tank 120 and/or desired rate of flow may determine the pressure of the compressed air supplied.
  • the gauge and length of travel of supply line 135 and/or supply line 145 may determine the pressure of the compressed air supplied.
  • the pressure of the air supplied may be any desired pressure.
  • the pressure of the compressed air is about 50 pounds per square inch (about 3.447 x 10 5 N/m 2 ) absolute (PSIA) air. This pressure may be selected based on the length of time and volume of lubricating oil desired to be delivered to engine elements.
  • the diameter/gauge and/ length of supply lines 135 and 145 may be sized to accommodate a desired pressure, length of time to deliver oil, and/or rate of power.
  • Determining a rate of compressed air delivered by the compressed air source 155 may be based on at least one of a length of the supply line 135, 145, a gauge of a portion of the supply line 135, 145, a nozzle selected for the distal end of the supply line, and/or a volume of the reserve tank 120.
  • a distal nozzle of supply lines 135 and 145 feeding lubricating oil to engine elements, such as bearing assemblies 1 and 3 may be sized to accommodate a desired pressure, length of time to deliver oil, and/or rate of power.
  • reserve tank 120 may be refilled and the emergency oil system may be ready for utilization in an emergency condition.
  • sensor 170 may detect normal oil pressure from oil supply 125.
  • sensor 170 may trigger check valve 150 to close and compressed air may be discontinued from being provided to reserve tank 120. Oil will continue to circulate through the system and through reserve tank 120, without additional force provided by the pressure accumulated through compressed air source 155.
  • the system described herein may maintain operation for at least 30 minutes once main oil supply has been restored.
  • Oil is delivered through main supply line 1 15 under pressure to engine components, such as bearing assemblies 1 and 3 (Step 310).
  • reserve tank 120 is located at the distal end of main supply line 1 15, the volume of lubricating oil in reserve tank 120 increases in response to lubricating oil being introduced to/through main supply line 1 15 (Step 320).
  • Reserve tank 120 may be empty or partially full on startup.
  • Lubricating oil is delivered through supply lines 135 and 145 to engine components based on oil pressure of reserve tank 120 (Step 330). The oil pressure is measured at a location, such as in main supply line 1 15, engine elements, and/or delivery tracks from main supply line 1 15 (Step 340).
  • references to "one embodiment”, “an embodiment”, “various embodiments”, etc. indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described. After reading the description, it will be apparent to one skilled in the relevant art(s) how to implement the disclosure in alternative embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

La présente invention concerne des systèmes de lubrification au moyen d'huile et plus particulièrement des systèmes de lubrification d'urgence au moyen d'huile. Ce système assure une circulation d'huile continue à travers un réservoir et/ou à partir de ce dernier. Ce système n'utilise pas de systèmes à air comprimé lors d'un fonctionnement normal pour acheminer l'huile de lubrification. Le système décrit n'utilise pas de piston pour transférer l'huide de lubrification d'un réservoir à des éléments de moteur.
PCT/US2014/042970 2013-08-20 2014-06-18 Système de lubrification d'urgence WO2015026429A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP14838757.4A EP3036470A4 (fr) 2013-08-20 2014-06-18 Système de lubrification d'urgence
US14/926,328 US20160047281A1 (en) 2013-08-20 2015-10-29 Emergency oil system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361867833P 2013-08-20 2013-08-20
US61/867,833 2013-08-20

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/926,328 Continuation US20160047281A1 (en) 2013-08-20 2015-10-29 Emergency oil system

Publications (1)

Publication Number Publication Date
WO2015026429A1 true WO2015026429A1 (fr) 2015-02-26

Family

ID=52484034

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2014/042970 WO2015026429A1 (fr) 2013-08-20 2014-06-18 Système de lubrification d'urgence

Country Status (3)

Country Link
US (1) US20160047281A1 (fr)
EP (1) EP3036470A4 (fr)
WO (1) WO2015026429A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11293313B2 (en) * 2018-09-19 2022-04-05 Saudi Arabian Oil Company Turbomachinery lubrication system improvement gravity rundown tanks
US11306812B2 (en) 2018-09-28 2022-04-19 Ge Avio S.R.L. System and method for emergency lubricant flow at an aircraft gear assembly
IT201900015515A1 (it) 2019-09-03 2021-03-03 Ge Avio Srl Gruppo ingranaggi con collettore per motore aeronautico
US11415051B2 (en) 2020-12-22 2022-08-16 General Electric Company System for lubricating components of a gas turbine engine including a lubricant bypass conduit

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4153141A (en) * 1977-06-20 1979-05-08 General Electric Company Auxiliary oil supply system
US4717000A (en) * 1986-08-05 1988-01-05 Avco Corporation Integrated emergency lubrication system
US4888947A (en) * 1988-10-31 1989-12-26 General Motors Corporation Secondary oil system
US5046306A (en) * 1990-07-23 1991-09-10 General Motors Corporation Secondary oil system
EP1510658A2 (fr) 2003-08-14 2005-03-02 United Technologies Corporation Système de lubrification d' urgence
US8230835B2 (en) * 2009-03-10 2012-07-31 Honeywell International Inc. Emergency engine lubrication systems and methods

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105093A (en) * 1977-02-03 1978-08-08 Westinghouse Electric Corp. Control system for pressurized lubricating system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4153141A (en) * 1977-06-20 1979-05-08 General Electric Company Auxiliary oil supply system
US4717000A (en) * 1986-08-05 1988-01-05 Avco Corporation Integrated emergency lubrication system
US4888947A (en) * 1988-10-31 1989-12-26 General Motors Corporation Secondary oil system
US5046306A (en) * 1990-07-23 1991-09-10 General Motors Corporation Secondary oil system
EP1510658A2 (fr) 2003-08-14 2005-03-02 United Technologies Corporation Système de lubrification d' urgence
US7387189B2 (en) * 2003-08-14 2008-06-17 United Technologies Corp. Emergency lubrication system
US8230835B2 (en) * 2009-03-10 2012-07-31 Honeywell International Inc. Emergency engine lubrication systems and methods

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3036470A4

Also Published As

Publication number Publication date
EP3036470A1 (fr) 2016-06-29
US20160047281A1 (en) 2016-02-18
EP3036470A4 (fr) 2016-08-17

Similar Documents

Publication Publication Date Title
US10072521B2 (en) FDGS auxiliary pump monitoring system
US20160047281A1 (en) Emergency oil system
DK2542793T3 (en) Rotor shaft lubrication system
US10107142B2 (en) Fan drive gear system auxiliary pump monitoring system
EP3171168B1 (fr) Système de surveillance des particules de métal non ferreux
US9732840B2 (en) Dual circuit lubrication method and device with increased reliability for a main power transmission gearbox of an aircraft
EP1925855B1 (fr) Système de lubrifiant avec efficacité opérationnelle d'urgence étendue
JP5214992B2 (ja) エンジン用予備潤滑装置および方法
EP3159500B1 (fr) Pompe auxiliaire et système de surveillance de circuit d'huile de moteur à turbine à gaz
WO2016171786A1 (fr) Système de lubrification de boîte d'engrenages pour aéronef
US11674413B2 (en) Gas turbine engine with gearbox health features
US8919499B2 (en) Circuit and a method for feeding oil to rolling bearings in a turbomachine
US20130068562A1 (en) Monitoring Overfilling In An Aeroplane Engine Lubrication System
US11236637B2 (en) Auxiliary lubrication system with flow management valve
US11428163B2 (en) Two tier lubrication system
WO2014011648A1 (fr) Système capteur de niveau de liquide
US20160298609A1 (en) Emergency lubrication for wind turbine gearboxes
US20110120154A1 (en) Passive oil level limiter
US11834972B2 (en) Turbomachinery lubrication system improvement gravity rundown tanks
WO2022054564A1 (fr) Dispositif d'alimentation en huile de lubrification et appareil d'essai de rotation équipé de celui-ci
EP3623661B1 (fr) Système de lubrification

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14838757

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2014838757

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE