USRE34235E - Sealing plug - Google Patents

Sealing plug Download PDF

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Publication number
USRE34235E
USRE34235E US07/614,036 US61403690A USRE34235E US RE34235 E USRE34235 E US RE34235E US 61403690 A US61403690 A US 61403690A US RE34235 E USRE34235 E US RE34235E
Authority
US
United States
Prior art keywords
iaddend
iadd
plug
housing
assembly
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 - Fee Related
Application number
US07/614,036
Inventor
Gordon C. Cooper
Margaret L. Dawson
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.)
Rolls Royce PLC
Original Assignee
Rolls Royce PLC
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
Priority claimed from GB08325268A external-priority patent/GB2146976B/en
Application filed by Rolls Royce PLC filed Critical Rolls Royce PLC
Priority to US07/614,036 priority Critical patent/USRE34235E/en
Application granted granted Critical
Publication of USRE34235E publication Critical patent/USRE34235E/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D33/00—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3296—Arrangements for monitoring the condition or operation of elastic sealings; Arrangements for control of elastic sealings, e.g. of their geometry or stiffness
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L35/00—Special arrangements used in connection with end fittings of hoses, e.g. safety or protecting devices
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/10—Means for stopping flow from or in pipes or hoses
    • F16L55/11—Plugs
    • F16L55/1125—Plugs fixed by rotating a limited amplitude
    • 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

Definitions

  • This invention relates to a sealing plug and more particularly to such a device suitable for use in an oil system of a gas turbine engine.
  • Such chip detectors comprise a magnetic plug which serves to give an early indication of engine component failures.
  • the magnetic chip detector is usually .Iadd.mechanically .Iaddend.secured within a .[.plug which is in turn mechanically secured to.]. .Iadd.housing in .Iaddend.the engine gear box by means of a screw connection or bayonet type fitting.
  • the object of the present invention is to provide a sealing plug in which the aforementioned problem may be substantially eliminated.
  • the plug member .Iaddend. may be secured .[.together the radially outermost cylindrical surface of the plug including at least one circumferentially extending groove within which an O ring seal may be disposed, the housing including an aperture within which the plug is adapted to be located,.]. .Iadd.within the housing.Iaddend., the housing also including at least one radially extending pin .[.which projects into the aperture.]. .Iadd.moveable between a first position projecting into the bore of the housing and a second position in which it does not so project .Iaddend.and .[.which.].
  • the pin .Iaddend. is adapted to be located within the at least one circumferentially extending groove when the O ring is omitted from the assembly .[.such as.]. .Iadd.thereby .Iaddend.to prevent the plug .Iadd.member .Iaddend.being secured within the housing by the co-operating means.
  • the plug includes two circumferentially extending grooves within each of which an O ring is located.
  • the at least one radially extending pin is provided with spring means such that it is urged radially inwardly into the .[.aperture.]. .Iadd.bore.Iaddend..
  • the co-operating means which secure the plug within the housing consists of a bayonet type fitting.
  • the plug includes a magnetic chip detector for use within the oil system of a gas turbine engine.
  • FIG. 1 shows diagrammatic side view of a ducted fan type gas turbine engine including oil system incorporating .Iadd.a .Iaddend.sealing plug made in accordance with the present invention.
  • FIG. 2 shows a cross-sectional view the sealing plug .Iadd.assembly.Iaddend..
  • a ducted fan type gas turbine engine shown generally at 10 comprises in flow series fan 12, intermediate pressure compressor 13, high pressure compressor 14, combustion equipment 15, high pressure turbine 16, intermediate pressure turbine 17 and low pressure turbine 18 the engine terminating in an exhaust nozzle 19.
  • the engine .[.bearing.]. .Iadd.bearings .Iaddend.which .[.supports.]. .Iadd.support .Iaddend.the respective main shafts are all lubricated from a central oil supply .Iadd.comprising .Iaddend.the oil tank 20 which includes a magnetic chip detector not shown in this drawing.
  • FIG. 2 of the drawings shows a cross-sectional view of the sealing plug .Iadd.assembly .Iaddend.in two positions.
  • the upper portion of the drawing shows the plug properly assembled .Iadd.into its housing .Iaddend.in a fluid tight manner with the O rings included.
  • the lower portion of the drawing shows the sealing plug improperly assembled with O rings omitted.
  • the device is automatically sealed by means of the spring urged member 30 which is automatically displaced such that face 31 comes into sealing engagement 32 and therefore makes the assembly fluid tight.

Abstract

A sealing plug .Iadd.assembly .Iaddend.includes a plug and a housing.Iadd., .Iaddend.the plug and the housing including co-operating .[.means.]. .Iadd.structures .Iaddend.whereby they may be secured together, the plug including two circumferentially extending grooves within which O ring seals are located, and the housing .[.including an aperture.]. .Iadd.having a bore .Iaddend.within which the plug is adapted to be located, the housing also including a spring loaded radially extending pin which projects into the .[.aperture.]. .Iadd.bore .Iaddend.and which is adapted to project into either of the grooves within the plug if an O ring is omitted, thus preventing the plug being secured with the housing by the co-operating .[.means.]. .Iadd.structures.Iaddend..

Description

.Iadd.This is a continuation of application Ser. No. 07/393,282, filed Aug. 14, 1989, now abandoned, which is for the reissue of U.S. Pat. No. 4,492,381, issued Jan. 8, 1985. .Iaddend.
This invention relates to a sealing plug and more particularly to such a device suitable for use in an oil system of a gas turbine engine.
It is well known in the gas turbine art to use magnetic chip detectors in the oil system. Such chip detectors comprise a magnetic plug which serves to give an early indication of engine component failures. The magnetic chip detector is usually .Iadd.mechanically .Iaddend.secured within a .[.plug which is in turn mechanically secured to.]. .Iadd.housing in .Iaddend.the engine gear box by means of a screw connection or bayonet type fitting. It is essential therefore that the joint between the plug and the .Iadd.housing in the .Iaddend.gear box is fluid tight to prevent leakage during engine operation and such sealing is invariably accomplished by means of sealing washers more commonly known as O ring seals which are adapted to provide a flexible seal between the two members.
Unfortunately, however it has been found that occasionally when the magnetic chip detector has been removed from the engine for inspection it has been thereafter replaced without the necessary O rings in place. As a consequence lubricating oil has leaked from around the plug resulting in the engine having to be prematurely shut down during flight to prevent catastrophic damage.
The object of the present invention is to provide a sealing plug in which the aforementioned problem may be substantially eliminated.
According to the present invention a sealing plug .Iadd.assembly .Iaddend.comprising a plug member .[.and.]. .Iadd.having a radially outermost cylindrical surface which defines at least one circumferentially extending groove for receipt of an O ring seal therein, .Iaddend.a housing.[., and housing including.]. .Iadd.for the plug member which defines a bore for location of .Iaddend.the plug .[.and housing including.]. .Iadd.member therein on the plug member .Iaddend.co-operating means .Iadd.on the plug member and the housing, .Iaddend.whereby .[.they.]. .Iadd.the plug member .Iaddend.may be secured .[.together the radially outermost cylindrical surface of the plug including at least one circumferentially extending groove within which an O ring seal may be disposed, the housing including an aperture within which the plug is adapted to be located,.]. .Iadd.within the housing.Iaddend., the housing also including at least one radially extending pin .[.which projects into the aperture.]. .Iadd.moveable between a first position projecting into the bore of the housing and a second position in which it does not so project .Iaddend.and .[.which.]. .Iadd.the pin .Iaddend.is adapted to be located within the at least one circumferentially extending groove when the O ring is omitted from the assembly .[.such as.]. .Iadd.thereby .Iaddend.to prevent the plug .Iadd.member .Iaddend.being secured within the housing by the co-operating means.
Preferably the plug includes two circumferentially extending grooves within each of which an O ring is located.
The at least one radially extending pin is provided with spring means such that it is urged radially inwardly into the .[.aperture.]. .Iadd.bore.Iaddend..
Preferably the co-operating means which secure the plug within the housing consists of a bayonet type fitting.
Preferably the plug includes a magnetic chip detector for use within the oil system of a gas turbine engine.
For better understanding of the invention an embodiment thereof will be more particularly described by way of example only and with reference to the accompanying drawings in which:
FIG. 1 shows diagrammatic side view of a ducted fan type gas turbine engine including oil system incorporating .Iadd.a .Iaddend.sealing plug made in accordance with the present invention.
FIG. 2 shows a cross-sectional view the sealing plug .Iadd.assembly.Iaddend..
Referring to the drawings a ducted fan type gas turbine engine shown generally at 10 comprises in flow series fan 12, intermediate pressure compressor 13, high pressure compressor 14, combustion equipment 15, high pressure turbine 16, intermediate pressure turbine 17 and low pressure turbine 18 the engine terminating in an exhaust nozzle 19. The respective high, intermediate and low pressure rotors .[.being.]. .Iadd.are .Iaddend.mounted upon the engine main shafts which are rotatably mounted within bearings.
The engine .[.bearing.]. .Iadd.bearings .Iaddend.which .[.supports.]. .Iadd.support .Iaddend.the respective main shafts are all lubricated from a central oil supply .Iadd.comprising .Iaddend.the oil tank 20 which includes a magnetic chip detector not shown in this drawing.
FIG. 2 of the drawings shows a cross-sectional view of the sealing plug .Iadd.assembly .Iaddend.in two positions. The upper portion of the drawing shows the plug properly assembled .Iadd.into its housing .Iaddend.in a fluid tight manner with the O rings included. The lower portion of the drawing shows the sealing plug improperly assembled with O rings omitted.
The sealing plug .Iadd.assembly .Iaddend.shown at FIG. 2 .[.consits.]. .Iadd.consists .Iaddend.of a housing 22 .Iadd.having a bore or internal chamber 22a .Iaddend.within which the plug 23 is located, the plug including a magnetic chip detector 23a and having two grooves 24 and 25 included .[.within.]. .Iadd.in .Iaddend.its cylindrical surface within which O rings are located which form a fluid .[.type.]. .Iadd.tight .Iaddend.seal between the housing 22 and the plug 23. As will be seen from the drawings.Iadd., .Iaddend.if the O rings are correctly located with the grooves 24 and 25 upon assembly of the plug 23 into the housing 22.Iadd., .Iaddend.the radially extending spring loaded pin 26 will be displaced radially outwards by firstly riding up the chamfered portion 27 of the plug 23 and thereafter over the O rings. The plug .[.therefor.]. .Iadd.therefore .Iaddend.may be pushed completely home and located in the preferred location by means of a bayonet type fitting, which essentially consists of pins 28 located upon the plug which engage behind portions 29 secured to the housing 22.
If however the O rings are omitted from the assembly as shown in the lower half of FIG. 2.Iadd., .Iaddend.it will be seen that the spring loaded pin 26 will be urged into the empty groove 24 and thus prevent the plug 23 being pushed fully home such that the bayonet type fitting cannot serve to lock the two members together. It will be appreciated that the spring loaded pin 26 will prevent the sealing plug being completely assembled if either .Iadd.or both .Iaddend.of the O rings.[., or both rings.]. are omitted from the assembly therefore ensuring the provision of a fluid .[.type.]. .Iadd.tight .Iaddend.joint.
If the plug is completely omitted from the housing the device is automatically sealed by means of the spring urged member 30 which is automatically displaced such that face 31 comes into sealing engagement 32 and therefore makes the assembly fluid tight.

Claims (5)

We claim:
1. A sealing plug .Iadd.assembly .Iaddend.comprising a plug member .[.and.]. .Iadd.having a radially outermost cylindrical surface, said surface defining at least one circumferentially extending groove for receipt of an O ring seal therein, .Iaddend.a housing .[.the.]. .Iadd.for said plug member, said housing defining a bore for location of said .Iaddend.plug .[.and housing including.]. .Iadd.member therein, .Iaddend.co-operating means .Iadd.on said plug member and said housing .Iaddend.whereby .[.the.]. .Iadd.said plug member .Iaddend.may be secured .[.together the radially outermost cylindrical surface of the plug including at least one circumferentially extending groove within which an O ring seal may be disposed, the housing including an aperture within which the plug is adapted to be located.]. .Iadd.within said housing, said housing further including at least one radially extending pin moveable between a first position projecting into said base of said housing and a second position in which it does not so project, said pin being adapted to locate .Iaddend.within .[.the.]. .Iadd.said .Iaddend.at least one circumferentially extending groove when .[.the.]. .Iadd.said .Iaddend.O ring is omitted from the assembly .[.such as.]. .Iadd.thereby .Iaddend.to prevent .[.the.]. .Iadd.said .Iaddend.plug .Iadd.member .Iaddend.being secured within .[.the.]. .Iadd.said .Iaddend.housing by .[.the.]. .Iadd.said .Iaddend.co-operating means.
2. A sealing plug .Iadd.assembly .Iaddend.as claimed in claim 1 in which the plug .Iadd.member .Iaddend.includes two circumferentially extending grooves within each of which an O ring seal is located.
3. A sealing plug .Iadd.assembly .Iaddend.as claimed in claim 1 in which the at least one radially extending pin is provided with spring means such that it is urged radially inwardly into the .[.aperture.]. .Iadd.bore.Iaddend..
4. A sealing plug .[.device.]. .Iadd.assembly .Iaddend.as claimed in claim 1 in which the co-operating means which secure the plug .Iadd.member .Iaddend.within the housing consists of a bayonet type fitting.
5. A sealing plug .Iadd.assembly .Iaddend.as claimed in claim 1 which includes a magnetic chip detector for use within the oil system of a gas turbine engine.
US07/614,036 1983-09-21 1990-11-16 Sealing plug Expired - Fee Related USRE34235E (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US07/614,036 USRE34235E (en) 1983-09-21 1990-11-16 Sealing plug

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8325268 1983-09-21
GB08325268A GB2146976B (en) 1983-09-21 1983-09-21 Improvements in or relating to a sealing plug
US39328289A 1989-08-14 1989-08-14
US07/614,036 USRE34235E (en) 1983-09-21 1990-11-16 Sealing plug

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
US06/631,748 Reissue US4492381A (en) 1983-09-21 1984-07-17 Sealing plug
US39328289A Continuation 1983-09-21 1989-08-14

Publications (1)

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USRE34235E true USRE34235E (en) 1993-04-27

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US07/614,036 Expired - Fee Related USRE34235E (en) 1983-09-21 1990-11-16 Sealing plug

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Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2196953A (en) * 1938-04-04 1940-04-09 Flexitallic Gasket Co Inc Gasket pressure control
US2757995A (en) * 1954-03-29 1956-08-07 John C Young Piston
US2762310A (en) * 1953-01-05 1956-09-11 Nat Supply Co Expansible plunger for free piston pumping apparatus
US3350103A (en) * 1965-08-02 1967-10-31 Ventura Tool Company Seal ring holding device
GB1227494A (en) * 1969-06-10 1971-04-07
US3587405A (en) * 1968-11-29 1971-06-28 Ltv Electrosystems Inc Indicating and seal activating device and method
US3711060A (en) * 1970-10-12 1973-01-16 Itt Zone control valve assembly
US3778881A (en) * 1972-11-29 1973-12-18 P Knapp Cylinder end assembly
US3947944A (en) * 1974-09-12 1976-04-06 Borg-Warner Corporation Shaft seal unitized transfer fixture
US4046387A (en) * 1976-09-16 1977-09-06 Lee Dalton I Device for indicating the presence of a gasket
US4103900A (en) * 1975-09-08 1978-08-01 Goldwell Gmbh Chemische Fabrik H.E. Dotter Originality seal for disposable receptacles
GB2053401A (en) * 1979-07-07 1981-02-04 Ruhrchemie Ag A hose coupling with automatic checking means
GB2058986A (en) * 1979-09-28 1981-04-15 Shinjo Seisakusho Yk Chute-hose coupler unit
US4407518A (en) * 1983-01-05 1983-10-04 Ferrofluidics Corporation Nonbursting multiple-stage ferrofluid seal and system
US4453698A (en) * 1982-04-29 1984-06-12 Allegheny Valve Company Stuffing box with O-ring detent for control mechanism of emergency valve

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2196953A (en) * 1938-04-04 1940-04-09 Flexitallic Gasket Co Inc Gasket pressure control
US2762310A (en) * 1953-01-05 1956-09-11 Nat Supply Co Expansible plunger for free piston pumping apparatus
US2757995A (en) * 1954-03-29 1956-08-07 John C Young Piston
US3350103A (en) * 1965-08-02 1967-10-31 Ventura Tool Company Seal ring holding device
US3587405A (en) * 1968-11-29 1971-06-28 Ltv Electrosystems Inc Indicating and seal activating device and method
GB1227494A (en) * 1969-06-10 1971-04-07
US3711060A (en) * 1970-10-12 1973-01-16 Itt Zone control valve assembly
US3778881A (en) * 1972-11-29 1973-12-18 P Knapp Cylinder end assembly
US3947944A (en) * 1974-09-12 1976-04-06 Borg-Warner Corporation Shaft seal unitized transfer fixture
US4103900A (en) * 1975-09-08 1978-08-01 Goldwell Gmbh Chemische Fabrik H.E. Dotter Originality seal for disposable receptacles
US4046387A (en) * 1976-09-16 1977-09-06 Lee Dalton I Device for indicating the presence of a gasket
GB2053401A (en) * 1979-07-07 1981-02-04 Ruhrchemie Ag A hose coupling with automatic checking means
GB2058986A (en) * 1979-09-28 1981-04-15 Shinjo Seisakusho Yk Chute-hose coupler unit
US4453698A (en) * 1982-04-29 1984-06-12 Allegheny Valve Company Stuffing box with O-ring detent for control mechanism of emergency valve
US4407518A (en) * 1983-01-05 1983-10-04 Ferrofluidics Corporation Nonbursting multiple-stage ferrofluid seal and system

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