Auxiliary oil system for geared gas turbine engine

a technology of auxiliary oil system and gas turbine engine, which is applied in the direction of machines/engines, gearing details, efficient propulsion technologies, etc., can solve the problems of many efficiencies, slow rotation speed of turbine rotor, and compromise in the desired speed of both fan rotor and turbine rotor

Active Publication Date: 2018-06-14
RTX CORP
View PDF8 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The auxiliary oil supply system effectively ensures the gear reduction remains lubricated for extended periods, enabling the engine to maintain operation and prevent damage during power outages or extreme conditions, such as windmilling, and allows for flight under negative gravity for at least 20 seconds.

Problems solved by technology

This led to compromise in the desired speed for both the fan rotor and the turbine rotor.
The fan rotor could not rotate unduly fast and, thus, the turbine rotor typically rotated slower than would be desired.
This has allowed the fan to rotate at slower speeds and results in many efficiencies.
However, the gear reduction requires adequate lubrication and must be lubricated even under extreme flight conditions.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Auxiliary oil system for geared gas turbine engine
  • Auxiliary oil system for geared gas turbine engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025]FIG. 1 schematically illustrates a gas turbine engine 20. The gas turbine engine 20 is disclosed herein as a two-spool turbofan that generally incorporates a fan section 22, a compressor section 24, a combustor section 26 and a turbine section 28. Alternative engines might include an augmentor section (not shown) among other systems or features. The fan section 22 drives air along a bypass flow path B in a bypass duct defined within a nacelle 15, while the compressor section 24 drives air along a core flow path C for compression and communication into the combustor section 26 then expansion through the turbine section 28. Although depicted as a two-spool turbofan gas turbine engine in the disclosed non-limiting embodiment, it should be understood that the concepts described herein are not limited to use with two-spool turbofans as the teachings may be applied to other types of turbine engines including three-spool architectures.

[0026]The exemplary engine 20 generally includes ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A gas turbine engine comprises a fan drive turbine, a fan rotor, and a gear reduction driven by the fan drive turbine to, in turn, drive the gear architecture. A main oil supply system supplies oil to components within the gear reduction, and an auxiliary oil supply system. The auxiliary oil system operates to ensure that the gear reduction will be adequately supplied with lubricant for at least 30 seconds at power should the main oil supply system fail.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to U.S. Provisional Patent Application No. 61 / 929,150, filed Jan. 20, 2014.BACKGROUND OF THE INVENTION[0002]This application relates to an auxiliary oil system to supplement a main oil supply system on a gas turbine engine with a gear drive for a fan.[0003]Gas turbine engines are known and, typically, include a fan delivering air into a bypass duct as propulsion air and also delivering air into a core engine. The core engine flow passes into a compressor where it is compressed and then delivered into a combustion section. The compressed air is mixed with fuel and ignited in the combustion section and products of this combustion pass downstream over turbine rotors driving them to rotate.[0004]Historically, a turbine rotor drove the fan rotor at a single speed. This led to compromise in the desired speed for both the fan rotor and the turbine rotor. The fan rotor could not rotate unduly fast and, thus, the tu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityApplications(United States)
IPC IPC(8): F02C7/06F02K3/06F01D25/20
CPCF02C7/06F02K3/06F05D2260/98F05D2260/40311F05D2220/323F01D25/20F16H57/08F16H57/04F05D2260/84F05D2270/09F02C7/36F05D2260/608F16H57/0427F16H57/0479F16H57/0486Y02T50/60
InventorSHERIDAN, WILLIAM G.
OwnerRTX CORP