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Device for driving a pair of counter-rotating propellers by means of an epicyclic gear train

A technology of reverse rotation and propeller, applied in the direction of transmission, engine components, engine functions, etc. to drive multiple propellers, it can solve the problem of damaged teeth, etc., and achieve the effect of reducing size and cantilever, reducing internal force and good flexibility

Active Publication Date: 2012-02-01
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

[0003] The advantage of an epicyclic gear drive chain is that it is compact, but large forces applied to it can damage the teeth

Method used

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  • Device for driving a pair of counter-rotating propellers by means of an epicyclic gear train
  • Device for driving a pair of counter-rotating propellers by means of an epicyclic gear train
  • Device for driving a pair of counter-rotating propellers by means of an epicyclic gear train

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Embodiment Construction

[0015] Referring to FIGS. 1 and 2 , the engine of the invention forms a unit comprising two propellers 1 , 2 each arranged to rotate about the same axis X. As shown in FIG. The upstream propeller 1 is mounted on the first hollow shaft 3 and the downstream propeller 2 is mounted on the second hollow shaft 4 . A first hollow shaft 3 is supported on a static housing 5 by means of a pair of bearings 6 and 7, beyond which the first hollow shaft 3 extends into a conical sleeve 8 with corrugations 9 and ends upwards There is a ring gear 10 with teeth formed on the inner surface. The second hollow shaft 4 is supported by the first hollow shaft 3 through two bearings 11 and 12, and the second hollow shaft 4 extends into a second conical sleeve 13 contained in the first conical Inside the sleeve 8 and connected to the pinion carrier 14 . The pinion carrier 14 has satellite gears 15 distributed around a circle meshing on the outer surface of the ring gear 10 and on the inner surface wi...

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Abstract

The invention relates to a turbine (18) for driving a planetary gear (16) and an epicyclic gear train (17), further including a satellite holder (14) and a wheel (10) for rotating two propellers, wherein said turbine is connected to the planetary gear by means of a flexible sleeve (22) surrounding a turbine-supporting shaft (19) rather than by means of the supporting shaft itself, so as to provide a mounting that is flexible with an abutment position against the shaft (19) in order to relieve the epicyclic gear train (17) from parasitic inner stresses without allowing for a loose mounting or a breakage of the sleeve due to the abutment condition once the clearance (27) has disappeared.

Description

technical field [0001] The present invention relates to a drive mechanism for a pair of counter-rotating propellers by means of an epicyclic gear drive chain. Background technique [0002] Counter-rotating propellers are known and are also envisioned for use on some future aircraft in order to reduce fuel consumption. The propeller's power transmission may include an epicyclic gear train. The power turbine (low pressure) turns a shaft which turns a planetary gear (sun gear) which forms part of an epicyclic gear train. The planet gears themselves drive the satellite gears and the planet pinion carrier, which connects the shaft of one of the propellers. The epicyclic gear also includes an outer ring gear with teeth on its inner surface, which engages the satellite and connects the shaft of the other propeller. Therefore, judicious choice of gear tooth ratio allows the propeller to rotate in two opposite directions at the required rate. Such an arrangement is described in d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K3/072F02C3/10F02C7/36F02C3/067F01D5/02
CPCF05D2260/4031F05D2240/62F02K3/072F02C3/10F02C7/36F02C3/067F05D2260/96F05B2260/4031B64D35/06F01D5/026F05B2260/96
Inventor 吉勒斯·艾伦·查瑞尔弗朗索瓦·加莱特
Owner SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A
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