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Mechanical gearbox for aircraft turbine

A technology for mechanical gearboxes and turbines, applied in mechanical equipment, machines/engines, transmission boxes, etc., can solve problems such as large axial overload size requirements, and achieve the effect of optimizing oil film thickness and optimizing lubricating oil consumption

Pending Publication Date: 2022-03-22
HISPANO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the installation of these supports entails significant axial overload dimensional requirements

Method used

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  • Mechanical gearbox for aircraft turbine
  • Mechanical gearbox for aircraft turbine
  • Mechanical gearbox for aircraft turbine

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Embodiment Construction

[0066] figure 1 A turbomachine 1 is described which generally comprises an axis of rotation X, a fan S, a low pressure compressor 1a, a high pressure compressor 1b, an annular combustor 1c, a high pressure turbine 1d, a low pressure turbine 1e and an exhaust nozzle 1h. The high-pressure compressor 1b and the high-pressure turbine 1d are connected by a high-pressure shaft 2 and together form a high-pressure (HP) body. The low-pressure compressor 1a and the low-pressure turbine 1e are connected by a low-pressure shaft 3 and together with this form a low-pressure (LP) body.

[0067] The fan S is driven by a fan shaft 4 which is driven by the LP shaft 3 by means of a gearbox 6 . The gearbox 6 is generally of the planetary or epicyclic type.

[0068] The following description refers to gearboxes of the planetary type, in which the ring gear is movable in rotation.

[0069] The gearbox 6 is positioned in the upstream part of the turbine. A fixed structure is arranged to form an ...

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Abstract

The present invention relates to a mechanical gearbox for an aircraft turbomachine, the gearbox comprising: a sun gear comprising an outer toothing, a ring gear comprising an inner toothing, and planetary gears, the planetary gears meshing with the sun gear and the ring gear, and the planetary gears each comprising a first toothing and a second toothing, a first toothing having a first average diameter meshes with the outer toothing of the sun gear, a second toothing having a second average diameter different from the first average diameter meshes with the inner toothing of the ring gear, and the planetary gears are guided by a hydrodynamic bearing. The hydrodynamic bearings each include a first smooth guide surface extending at least partially below the first toothing and a second smooth guide surface extending at least partially below the second toothing. The invention also relates to an aircraft turbine comprising such a gearbox.

Description

technical field [0001] The invention relates to the field of mechanical gearboxes for turbines, in particular aircraft, and in particular to gearboxes equipped with geared double-stage planetary gears. Background technique [0002] The prior art includes in particular documents US-A1-2019 / 011038, DE-A1-102017127874, US-A1-2020 / 191256, WO-A1-2010 / 092263, FR-A1-2987416, FR-A1-3011901, FR -A1-3041054, FR-A1-3058493, FR-A1-3 066792, FR-A1-3069301 and FR-A1-3076336. [0003] The function of a mechanical gearbox is to change the speed-to-torque ratio between the input and output axes of a mechanical system. [0004] Newer generations of multi-flow turbines, especially those with high bypass ratios, include mechanical gearboxes to drive the shafts of ducted or non-ducted propellers (also called "fans"). The usual purpose of a gearbox is to convert the so-called high rotational speed of the shaft of the power turbine into a slower rotational speed of the shaft used to drive the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H1/28F16H57/02F16H57/021F16H57/023F16H57/04F16H57/08
CPCF16H1/28F16H57/02F16H57/021F16H57/023F16H57/0427F16H57/042F16H57/0479F16H57/0486F16H57/08F16H2057/02039F16H2057/085F16H2001/2881F05D2260/40311F16C2360/23F16C2361/61F16C17/028B64D35/02F01D15/12F16C32/064
Inventor 阿德瑞安·路易斯·西蒙纪尧姆·皮埃尔·莫利巴林特·帕普
Owner HISPANO