# US 10,871,084 B2 · Mount assembly

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- Number: US 10,871,084 B2
- Document ID: US10871084B2
- Status: Granted
- Kind: B2
- Application number: 16/047,403
- Filed: 2018-07-27
- Published: 2019-03-28
- Granted: 2020-12-22
- Earliest claimed: 2017-07-31
- Assignees: ROLLS-ROYCE plc
- Applicants: ROLLS-ROYCE plc
- Inventors: John P. Wootton; Marisol Morales
- Web page: https://patentgrep.com/patent/US10871084B2

## CPC

- F01D 25/28: Supporting or mounting arrangements, e.g. for turbine casing
- F01D 25/12: Cooling
- F02C 7/18: the medium being gaseous, e.g. air {(F02C7/125 takes precedence)}
- F02C 7/20: Mounting or supporting of plant; Accommodating heat expansion or creep
- F02C 7/32: Arrangement, mounting, or driving, of auxiliaries
- F02K 3/105: Heating the by-pass flow
- F02K 3/115: by means of indirect heat exchange
- F05D 2220/32: in gas turbines
- F05D 2230/642: using maintaining alignment while permitting differential dilatation
- F05D 2240/91: on a stationary structure
- F05D 2260/20: Heat transfer, e.g. cooling
- F05D 2260/213: by the provision of a heat exchanger within the cooling circuit
- F05D 2260/30: Retaining components in desired mutual position
- Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00)
- F02K: JET-PROPULSION PLANTS (features of jet-propulsion plants common to gas-turbine plants, air intakes or fuel supply control of air-breathing jet-propulsion plants F02C7/00, F02C9/00)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A mount assembly for attaching a heat exchanger to a casing of a gas turbine engine comprises a first attachment feature by which in use the mount assembly is attached to the casing and a second attachment feature spaced from the first attachment feature by which in use the mount assembly is attached to the heat exchanger. The first and second attachment features are joined by an elongate member. The assembly is characterised in that the elongate member is significantly larger in a length direction and a height direction than in a thickness direction, so that it is relatively stiff in the length and height directions L, H and relatively flexible in the thickness direction T; the flexibility allowing movement in use within the mount assembly to accommodate differential thermal expansion between the heat exchanger and the casing.

## Claims

### Claim 1

A mount assembly for attaching a heat exchanger to a casing of a gas turbine engine, the assembly comprising:
a first attachment feature by which the mount assembly is attached to the casing;
a second attachment feature spaced from the first attachment feature by which the mount assembly is attached to the heat exchanger; and
an elongate member that joins the first and second attachment features, wherein the elongate member is larger in a length direction, L, extending between the first and second attachment features and in a height direction, H, extending between the heat exchanger and the casing, than in a thickness direction, T, extending perpendicular to the length direction, L, and the height direction, H, so that the elongate member is more stiff in the length and height directions L, H, than in the thickness direction, and more flexible in the thickness direction T than in the length, L, and height, H, directions, the flexibility allowing movement within the mount assembly to accommodate differential thermal expansion between the heat exchanger and the casing.

### Claim 2 (depends on 1)

The mount assembly of claim 1, in which the assembly comprises two first attachment features and two elongate members, each first attachment feature being joined to the second attachment member by a respective elongate member.

### Claim 3 (depends on 1)

The mount assembly of claim 1, in which the elongate member is S-shaped.

### Claim 4 (depends on 1)

The mount assembly of claim 1, in which the second attachment feature comprises a threaded insert.

### Claim 5 (depends on 1)

An arrangement for mounting a heat exchanger on a casing of a gas turbine engine, the arrangement comprising a plurality of mount assemblies as claimed in claim 1.