# US 2014/0150575 A1 · Accessory relay having an extended service life

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- Number: US 2014/0150575 A1
- Document ID: US20140150575A1
- Status: Published application
- Kind: A1
- Application number: 14/128,909
- Filed: 2012-06-21
- Published: 2014-06-05
- Earliest claimed: 2011-06-24
- Assignees: Hispano Suiza; Snecma
- Inventors: Julien Viel; Guy Desme; Claude Gallo
- Web page: https://patentgrep.com/patent/US20140150575A1

## CPC

- B60K 25/06: from the transmission power take-off
- B64D 41/007: {Ram air turbines}
- F01D 25/162: {Bearing supports}
- F02C 7/06: Arrangements of bearings (bearings F16C); Lubricating ({of turbo machines F01D25/18; of machines or} engines in general F01M)
- F02C 7/32: Arrangement, mounting, or driving, of auxiliaries
- F02C 7/36: Power transmission arrangements between the different shafts of the gas turbine plant, or between the gas-turbine plant and the power user ({F02C3/107 - F02C3/13 and} F02C7/32 take precedence; couplings for transmitting rotation F16D; gearing in general F16H)
- B64D 2041/002: {Mounting arrangements for auxiliary power units (APU's)}
- F05D 2220/50: for auxiliary power units (APU's)
- F05D 2260/4031: as in toothed gearing
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN 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)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

## Abstract

An accessory relay for a turbine engine, including a housing in which at least one gear wheel is installed for mechanically driving an accessory mounted on the housing, the gear of the wheel being driven via an input shaft supplying torque required for the mechanical drive, the shaft of the wheel being supported by at least two ball or roller bearings, and passing through at least one of the walls of the housing via an opening positioned opposite the accessory and closed by a first accessory cover attached onto the housing, wherein, for at least one of the gear wheels, the shaft thereof passes through two walls of the housing via openings closed by covers attached onto the housing, and the outer races of the two bearings are supported by the covers.

## Claims

### Claim at position 1

1-5. (canceled)

### Claim 6

An accessory gearbox for a turbine engine, comprising:
a housing in which at least one gear wheel is installed for mechanically driving an accessory mounted on the housing,
the gear of the wheel being driven via an input shaft supplying torque required for the mechanical drive,
the input shaft of the wheel being supported by at least two ball or roller bearings, and passing through at least one of walls of the housing via an opening positioned opposite the accessory and closed by a first accessory cover attached to the housing,
wherein, for at least one of the gear wheels, the shaft thereof passes through two walls of the housing via openings closed by covers attached to the housing, and wherein outer races of the two bearings are supported by the covers.

### Claim 7 (depends on 6)

An accessory gearbox according to claim 6, wherein the gear wheel is coupled to the input shaft in addition to coupling thereof to the accessory mounted on the housing, the outer race of one of the bearings being attached to the cover associated with the input shaft and the outer race of the other bearing being attached to the cover associated with the shaft of the accessory.

### Claim 8 (depends on 6)

An accessory gearbox according to claim 6, wherein the gear wheel is coupled to an alternator.

### Claim 9 (depends on 7)

An accessory gearbox according to claim 7, wherein the cover associated with the accessory comprises an axial cylindrical extension extending inside the corresponding opening.

### Claim 10 (depends on 9)

An accessory gearbox according to claim 9, wherein the axial cylindrical extension co-operates with the corresponding opening to ensure positioning of the cover on the housing.