Rolls-royce Corporation

Rolls-royce Power Engineering Plc

Thomas J Jones

Gary F Szuminski

Nicholas M Brown

David S Curtis

Christopher Rafferty

Richard Freeman

Matthew Murphy

The present disclosure relates to a method of forming a component and at least one support structure joined to the component by additive layer manufacturing, wherein the support structure has a reduced density and/or increased porosity relative to the component. The method then comprises a subsequent heat treatment step at increased pressure on the component and support structure to separate the component and at least one support structure.

Manufacturing method

An air swirler arrangement comprises a coaxial arrangement of an inner and an outer air swirler passage. Each air swirler passage comprises a radial flow swirler. Air swirler arrangement comprises a coaxial arrangement of first, second and third members. Second member has radially extending upstream portion spaced axially from first member and a convergent portion. Third member has a radially extending upstream portion spaced axially from the upstream portion of second member and a radially inner surface having convergent and divergent downstream portions and a radially outer surface having a divergent downstream portion. First, second and third members the vanes of the radial flow swirlers is a monolithic structure. Plurality of circumferentially spaced passages are provided within the third member and each passage has an inlet in the surface and an outlet arranged to direct fluid onto the divergent portion of the surface or the surface of the third member.

Air swirler arrangement for a fuel injector of a combustion chamber

An exhaust nozzle for a gas turbine engine comprising a duct 17(c) extending along an axis and having at a dowstream end thereof a mechanism for varying the geometry and area of the nozzle. The mechanism 28 comprises an axially translatable member 28 which has a face 29 extending in a direction transverse to the axis of the duct 17(c) against which pressurized gases flowing through the duct acts to balance out the loads on the flaps. A plurality of flaps 38,43 are spaced circumferentially around the axis of the duct. The flaps 38 are pivotally attached to the axially translatable member 28 and are provided with a cam follower 40 that co-operates with a cam 37. The cams 37 are fixed relative to the duct 17(c) and thereby defines the attitude of each flap 38 relative to the member 28. Seal plates 41 and 45 cover the gaps between adjacent flaps 38 and 43 to the seal plates 45. A plurality of struts interconnect the member 28 and the second flaps of the pivotal attachment of the flaps 43 to the flap 38. A set of flaps 47 are provided to provide fairing between the downstream ends of the member 28 and the flaps 43. In operation axial movement of the member 28 moves the flaps 38 and 43 to different positions.

Variable geometry nozzles for turbomachines

A vectorable nozzle 17 comprising a fixed first duct 21 a rotatable second duct 22 scarfed at its rear end and a rotatable third duct 23 scarfed at its front end. The second and third ducts 22,23 are mounted in bearings 24,26 respectively and the bearing 26 is constrained to swing bodily about trunnions 29, the axis of which lies transverse to the ducts 22,23, and a screw jack 32 is provided to rotate the bearing 26 about the trunnions 29. The second and third ducts 22,23 are provided with means to rotate them in opposite directions in syncronism with the rotation of the bearing 26 in the trunnion 29.

Vectorable nozzles for turbomachines

An assembly comprising two components having different thermal coefficients of expansion. Each component is provided with means such as flanges and bolts for securing the components together. At least one of the components is provided with slots in the flange and end portion of the component to impart flexibility thereto. One of the components is provided with a bridging piece which covers the slots to prevent leakage of fluid through the slots, and the bridging piece has a seal that engages the other of the components to form an effective fluid seal.

Growing community of inventors

Bristol, United Kingdom

Thomas J Jones