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Contra-rotating propeller system for an aircraft turbine engine

A propeller and turbine technology, applied in propellers, aircraft parts, machines/engines, etc., can solve problems such as increasing the length of the turbine engine, and achieve the effects of reducing quality, reducing size, and limiting costs

Active Publication Date: 2012-09-19
SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to limit the noise of the turbine engine, the engine must include sufficient clearance between the upstream screw propeller and the downstream screw propeller, which increases the length of the turbine engine

Method used

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  • Contra-rotating propeller system for an aircraft turbine engine
  • Contra-rotating propeller system for an aircraft turbine engine
  • Contra-rotating propeller system for an aircraft turbine engine

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Embodiment Construction

[0034] Typically, a turbine engine includes, from upstream to downstream, a low-pressure compressor, a high-pressure compressor, a combustion chamber, a high-pressure turbine, and a low-pressure turbine. Hereafter, the terms "upstream" and "downstream" are defined with regard to the circulation of gas in the turbine engine, the gas circulating from upstream to downstream. Similarly, it is agreed in this application that the terms "internal" and "external" Figure 1-Figure 4 The X axis of the engine illustrated in is defined along the radial direction. Therefore, a cylinder extending along the engine shaft includes an inner surface facing the engine shaft and an outer surface opposite to the inner surface.

[0035] The low-pressure compressor and the low-pressure turbine are mechanically connected through a low-pressure shaft to form a low-pressure cylinder; and the high-pressure compressor and the high-pressure turbine are mechanically connected through a high-pressure shaft to ...

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PUM

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Abstract

The invention relates to a contra-rotating propeller system for an aircraft turbine engine, including a free power turbine including a first rotor and a second rotor contra-rotating relative to said first rotor, a first contra-rotating propeller (11) and a second contra-rotating propeller (12) to be rotated about a longitudinal axis of the propeller system relative to a stator of said system, and a mechanical transmission device (20), wherein said system is characterized in that the mechanical transmission system (20) is provided between the first propeller (11) and the second propeller (12).

Description

Technical field [0001] The invention relates to a counter-rotating propeller system for aircraft turbine engines. Background technique [0002] The invention is applied to aircraft turbine engines, such as turbojet engines or turboprop engines. More specifically, it is applied to a turbine engine with "open rotor", in which an unpowered turbine directly or indirectly drives two counter-rotating propellers through a mechanical transmission device such as a reducer and in particular a planetary gear train. In these counter-rotating propeller systems, the propellers therefore do not have fairing at their outer radial ends. [0003] Turbine engines with counter-rotating propeller systems are known, the propellers of which are driven by a mechanical transmission, usually a differential reducer. The differential reducer includes a special planetary gear train, the sun gear is driven by a rotor without a power turbine, the planet carrier drives the first screw propeller, and the ring ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K3/072F02C3/067F02C7/36B64D35/06B64C11/48
CPCF02K3/072F05D2260/40311Y02T50/671F05B2260/96F02C3/067Y02T50/66B64D2027/026F02C7/36F05D2260/96B64C11/48F05B2260/40311F05D2260/98Y02T50/60F02C3/10
Inventor 沃特·鲍克
Owner SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A