[특허]Redundant mounting system for an internal fuel manifold

Pratt & Whitney Canada Corp.

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특허 상세정보

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Redundant mounting system for an internal fuel manifold

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02C-001/00
미국특허분류(USC)	060/739; 060/796
출원번호	UP-0749230 (2007-05-16)
등록번호	US-7856825 (2011-02-24)
발명자 / 주소	Fish, Jason Urac, Tibor
출원인 / 주소	Pratt & Whitney Canada Corp.
대리인 / 주소	Ogilvy Renault LLP
인용정보	피인용 횟수 : 2 인용 특허 : 46

초록
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A mounting system for an annular internal fuel manifold disposed within a gas generator case of a gas turbine engine including at least one fastener support assembly and at least one receiving element, each fastener support assembly including a primary fastener engaging the receiving element to constrain a relative movement between the fuel manifold and the gas generator case in an axial direction while allowing the relative movement in a radial direction and a secondary fastener in position to passively and automatically engage the receiving element upo...

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What is claimed is: 1. A mounting system for an annular internal fuel manifold disposed within a gas generator case of a gas turbine engine, the mounting system comprising at least one fastener support assembly and at least one receiving element, one of the fastener support assembly and the receiving element being engaged to the internal fuel manifold and the other of the fastener support assembly and the receiving element being engaged to the gas generator case, each fastener support assembly including a primary fastener and a secondary fastener, the primary fastener engaging the receiving element to constrain a relative movement between the fuel manifold and the gas generator case in an axial direction while allowing the relative movement in a radial direction, the secondary fastener being in position to passively and automatically engage the receiving element in the event of failure of the primary fastener, to constrain the relative movement in the axial direction while allowing the relative movement in the radial direction, and wherein the primary and secondary fasteners include radially extending concentric pins comprising a secondary pin disposed within a primary pin and extending the length thereof, and the receiving element includes a lug defining an aligned opening receiving inner ends of both the primary and secondary pins, the concentric primary and secondary pins being slideable relative to each other along a longitudinal axis of the pins. 2. The mounting system as defined in claim 1, wherein the mounting system includes three support points, each of at least two of the support points being defined by one of the at least one fastener support assembly cooperating with one of the at least one receiving element. 3. The mounting system as defined in claim 2, wherein the fuel manifold includes a radially extending fuel inlet tube, the fuel inlet tube being received within a corresponding bushing of the gas generator case in a radially slidable relationship to define one of the three support points. 4. The mounting system as defined in claim 1, wherein the fastening support assembly is engaged to the gas generator case and the receiving element is engaged to the fuel manifold. 5. The mounting system as defined in claim 4, wherein each of the fastening elements has an outer end removably engaged to the gas generator case such that each of the fastening elements is replaceable. 6. The mounting as defined in claim 5, wherein the outer end of the secondary fastening element is fastened directly to the gas generator case and the outer end of the primary fastening element is retained to the gas generator case by the outer end of the secondary fastening element. 7. The mounting system as defined in claim 1, wherein the fastening elements extend radially, the secondary fastening element being received within a central bore defined through the primary fastening element, the secondary fastening element having a free end protruding from an end of the primary fastening element cooperating with the receiving element. 8. A mounting system for an annular internal fuel manifold disposed within a gas generator case of a gas turbine engine, the mounting system comprising at least one pair of concentric pins and at least one lug, the pair of pins including a first pin received within a central bore of a second pin, the first and second pins respectively having a first and a second outer end engageable to the gas generator case, the first and second pins respectively having a first and a second inner end projecting radially inwardly with the first inner end protruding from the second inner end when the outer ends are engaged to the gas generator case, both the first and second inner ends of the first and second pins being received within the lug, the lug being disposed on the fuel manifold in alignment with the pair of pins and having an opening defined therein, the first inner end being received within a first portion of the opening and the second inner end being received within a second portion of the opening, the concentric first and second pins being slideable relative to each other along a longitudinal axis of the pins, the inner end of one of the first and second pins being received in the opening with a smaller clearance than that of the other of the first and second pins such as to mate with the lug to constrain a relative motion between the fuel manifold and the case in an axial direction while permitting the relative motion in a radial direction, the other of the first and second pins constraining the relative motion in the axial direction while permitting the relative motion in the radial direction upon failure of the one of the first and second pins. 9. The mounting system as defined in claim 8, wherein the first outer end includes a thread cooperating with a corresponding threaded portion of a boss defined in the gas generator case and within which the first outer end is received to engage the first outer end to the gas generator case. 10. The mounting system as defined in claim 9 wherein the boss includes an unthreaded portion defined radially inwardly of the threaded portion, the unthreaded portion including a shoulder against which the second outer end is received, the second outer end being maintained against the shoulder and engaged to the gas generator case by the first outer end threadingly engaged to the threaded portion of the boss and abutting the second outer end. 11. The mounting system as defined in claim 8, wherein the one of the first and second pins is the second pin. 12. The mounting system as defined in claim 8, wherein the first pin is slidably received within the central bore of the second pin. 13. The mounting system as defined in claim 8, wherein the at least one pair of concentric pins includes two pairs of concentric pins and the at least one lug includes two lugs, each of the pair of concentric pins defining a support point together with a corresponding one of the lugs, and the mounting system further comprises an additional support point provided by a radially extending fuel inlet tube of the fuel manifold slidably received in a corresponding bore of the case. 14. A fuel injection system for gas turbine engine, comprising: an annular internal fuel manifold disposed adjacent a combustor of the engine within a surrounding gas generator case, the fuel manifold having at least one fuel conveying passage therein in fluid flow communication with a plurality of fuel injection nozzles disposed along the fuel manifold and adapted to spray fuel into the combustor; and a mounting system supporting and positioning the fuel manifold relative to the combustor within the gas generator case, the mounting system including at least one support assembly disposed between the fuel manifold and the gas generator case, each said support assembly including a pair of fastening elements and a receiving element, the pair of fastening elements including a primary fastening element extending into and engaging the receiving element to provide axial constraint while permitting the fuel manifold to radially displace relative to the surrounding gas generator case due to thermal size change, the pair of fastening elements also including a secondary fastening element extending into the receiving element such as to engage the receiving element upon failure of the primary fastening element to provide the axial constraint while permitting the fuel manifold to radially displace relative to the surrounding gas generator case due to thermal size change, and wherein the primary and secondary fastening elements are concentric and include radially extending primary and secondary pins, the secondary pin being disposed within the primary pin and extending the length thereof, the primary and secondary pins being slideable relative to each other along a longitudinal axis of the pins, and the receiving element includes a lug defining an aligned opening receiving inner ends of both the primary and secondary pins. 15. The fuel injection system as defined in claim 14, wherein the mounting system includes three support points, at least two of the support points being defined by one of the at least one support assemblies. 16. The fuel injection system as defined in claim 15, wherein the fuel manifold includes a radially extending fuel inlet tube providing fuel flow to the fuel conveying passage, the fuel inlet tube being received within a corresponding bushing of the gas generator case in a radially slidable relationship to define one of the three support points. 17. The fuel injection system as defined in claim 14, wherein the fastening elements are engaged to the gas generator case and the receiving element is engaged to the fuel manifold. 18. The fuel injection system as defined in claim 14, wherein the fastening elements are concentric and extend radially, the secondary fastening element being received within a central bore defined through the primary fastening element, the secondary fastening element having a free end protruding from an end of the primary fastening element cooperating with the receiving element.

이 특허에 인용된 특허 (46)

이 특허를 인용한 특허 (2)

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Redundant mounting system for an internal fuel manifold

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이 특허에 인용된 특허 (46)

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Redundant mounting system for an internal fuel manifold

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이 특허에 인용된 특허 (46)

이 특허를 인용한 특허 (2)

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IPC 상세정보(version : 201201)

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