# US 2020/0400052 A1 · Accessory Gearbox

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2020/0400052 A1
- Document ID: US20200400052A1
- Status: Published application
- Kind: A1
- Application number: 16/754,014
- Filed: 2018-10-03
- Published: 2020-12-24
- Earliest claimed: 2017-10-05
- Assignees: Joint-Stock Company "United Engine Corporation"
- Applicants: Joint-Stock Company "United Engine Corporation"
- Inventors: Konstantin Andreevich STYAZHKOV; Rafis Zafarovich KHASANOV; Artem Viktorovich CHIRKOV
- Web page: https://patentgrep.com/patent/US20200400052A1

## CPC

- F01M 13/04: having means for purifying air before leaving crankcase, e.g. removing oil
- F02C 7/32: Arrangement, mounting, or driving, of auxiliaries
- F02C 7/06: Arrangements of bearings (bearings F16C); Lubricating ({of turbo machines F01D25/18; of machines or} engines in general F01M)
- F16H 57/027: characterised by means for venting gearboxes, e.g. air breathers
- F16H 57/0402: {Cleaning of lubricants, e.g. filters or magnets}
- F16N 39/002: {by deaeration (degasification of liquids B01D19/00)}
- F01M 2013/0422: {Separating oil and gas with a centrifuge device}
- F05D 2240/70: Slinger plates or washers
- F05D 2260/609: Deoiling or demisting
- F16N 2210/02: Turbines
- Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft
- F01M: LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- 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)
- F16H: GEARING
- F16N: LUBRICATING
- 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

The invention is related to the area of aviation engine building, particularly, to the elements of the gas turbine engine lubrication system. Accessory gearbox containing a gear, a branch pipe, bearings, a centrifugal impeller with blades. The centrifugal impeller with the blades contains a shell with the potential formation of inner cavities, windows for the gas-oil mixture inlet and air outlet, the blades have different lengths and are located at the angles α and β to the gear rotation axis. Besides, the centrifugal impeller may contain curvilinear blades. Besides, the centrifugal impeller may contain at least two oil and air separation stages installed in series. The implementation of the invention proposed with the distinctive features above, in combination with the known features enables improvement of the assembly technology, reduction of the outline dimensions and weight of the accessory gearbox, improvement of the oil separation.

## Claims

### Claim 1

Accessory gearbox containing a gear, a branch, bearings, a centrifugal impeller with blades characterized in that the centrifugal impeller with blades contains a shell with the potential of formation of internal cavities, windows for the gas-oil mixture inlet and air outlet, the blades have different lengths and are located at the angles α and β to the gear rotation axis.

### Claim 2 (depends on 1)

Accessory gearbox as per claim 1 characterized in that the centrifugal impeller has curvilinear blades.

### Claim 3 (depends on 1)

Accessory gearbox as per claim 1 characterized in that the centrifugal impeller has at least two oil/air separation stages installed in series.