US 9,518,737 B2Granted

Combustion chamber with cooling passage in fastener arrangement joining inner and outer walls

AssigneeROLLS-ROYCE plc

InventorsAnthony Pidcock, Paul Ian Chandler

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Abstract

A combustion chamber comprises an outer wall and an inner wall spaced from the outer wall. The outer wall has at least one mounting aperture extending there-through and the inner wall has threaded studs extending there-from. The threaded studs extend through the mounting apertures in the outer wall. Cooperating nuts locate on the studs and washers are positioned between the outer wall and the cooperating nuts. Each washer has a rim and a bore. The washers have one or more passages extending there-through from the rim to the bore of the washer to provide a flow of coolant through the passages in the washers, the mounting apertures in the outer wall and around the threaded studs to cool the threaded studs to increase the working life of the inner wall. Other cooling arrangements for the threaded studs are disclosed.

Claims22

Dependent claims

A combustion chamber comprising,

an outer wall and an inner wall spaced from the outer wail,
the outer wall having at least one mounting aperture extending there-through,
the inner wall having at least one fastener extending there-from,
the at east one fastener on the inner wall extending through a corresponding mounting aperture in the outer wall,
a cooperating fastener locating on the at least one fastener extending through the corresponding mounting aperture and a washer positioned on the at least one fastener between the outer wall and the cooperating fastener,
the at least one fastener extending entirely through the washer,
the washer having a first surface abutting an outer surface of the outer wail and a second surface abutting a surface of the cooperating fastener,
the washer having a rim and a bore, and
(i) the washer having at least one passage extending there-through from the rim to the bore, (ii) the washer having at least one groove extending from the rim towards the bore on the first surface, (iii) the washer having at least one groove extending from the bore towards the rim on the second surface, or (iv) the surface of the cooperating fastener abutting the second surface of the washer having at least one groove extending towards the bore of the washer,
whereby, in use, a flow of coolant is provided to flow through the mounting aperture and around the at least one fastener,
wherein the fastener has an outer surface and a plurality of projections extending radially outward from the outer surface of the fastener with respect to a centerline of the fastener, and the projections are arranged at an end of the fastener adjacent to the inner wall.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/097,791Filed 5 Dec 2013
Priority: GB 1222311.112 Dec 2012
Published: US 2014/0190166 A110 Jul 2014
Granted: 13 Dec 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

F23R 3/002
Continuous combustion chambers using liquid or gaseous fuel: wall structures
F23R 3/60
Characterised by the arrangement or form of the flame tubes or combustion chambers: support structures; Attaching or mounting means
F05D 2260/31
Retaining components in desired mutual position: retaining bolts or nuts
F16B 37/00
Nuts or like thread-engaging members

Family

US 2014/0190166 A1Pre-grant publication · published 10 Jul 2014
US 9,518,737 B2This patent

From the US filing history. Foreign family members aren’t listed.

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