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Method and device for balancing pressure in a turbojet bearing housing

A technology of turbojet and balancing device, which is applied in the direction of engine lubrication, jet propulsion device, gas turbine device, etc., to achieve the effect of reducing weight, simple implementation and reducing displacement

Active Publication Date: 2014-07-23
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

[0009]Since seals are exposed to large variations in pressure differentials in addition to large pressure differentials, seals wear out more quickly and are therefore at greater risk of damage

Method used

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  • Method and device for balancing pressure in a turbojet bearing housing
  • Method and device for balancing pressure in a turbojet bearing housing
  • Method and device for balancing pressure in a turbojet bearing housing

Examples

Experimental program
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Embodiment Construction

[0053] figure 1 and figure 2 The front casing 20 with the front bearings 21 , 22 and 23 and the rear casing 30 with the rear bearings 32 and 33 of the turbojet engine are shown respectively. As far as these housings are concerned, the low pressure rotor 40 includes ducts 41 to remove air and a portion of the lubricating oil entrained by the air and not trapped by the degreaser, this mixture flows through the front housing 20 and the rear housing 30 .

[0054] The position of these front and rear casings 20 and 30 in the turbojet engine is as follows Figure 14 shown.

[0055] More precisely, as figure 1 As shown, the boost line delivers three lines (arrows 51 , 52 and 53 shown in solid lines) of charge air from the drive air stream to the front housing 20 , while the front housing 20 receives lubricating oil via nozzles.

[0056] This lubricating oil is mainly removed via a line that recovers the lubricating fluid (arrow 29 ) from the front housing 20 .

[0057] The ch...

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PUM

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Abstract

The invention relates to a pressure equalization device for equalizing the pressure in at least one bearing housing of a turbojet engine, said housing comprising means for supplying a lubricating liquid to said bearing, air intake means, arranged in front of the stator and said bearing and / or or at least one sealing system between the rotors behind, recovery means for recovering the lubricating liquid, and means for removing air and a small amount of lubricating liquid mixture to the ventilation line (60). characterized in that, downstream of the bearing housing and in the ventilation duct, the balancing device comprises a regulating system (100) for regulating the air discharge flow, so that said flow varies with the engine speed, remains non-zero, and At high speeds, the flow rate is lower than when the conditioning system is not used.

Description

technical field [0001] The invention relates to a method and a device for equalizing pressure in at least one bearing housing of a turbojet engine. Background technique [0002] Cases used in the field of turbojet engines, each containing rolling bearings between a rotatably mounted part and a fixedly mounted part, with oil circulation for lubricating and cooling the components. [0003] In the following, the adjectives "stationary", "movable" and "movable in rotation" mean that said parts or parts are inactive or active relative to the turbojet engine as a whole. [0004] To ensure that the oil remains within the housing until it is recovered and recirculated in the lines, and to prevent it from contaminating other chambers in the engine flow section, the air within the housing is pressurized. [0005] Unfortunately, because the air has flowed through the upstream stages of the engine, it has been compressed and then injected into the casing at near-atmospheric pressure, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D17/20F01D17/14F02C7/06F02C7/28F01D25/16F01D25/18
CPCF05D2240/63Y02T50/671F01D25/183F01D25/16F02C7/06
Inventor 艾恩·芬特斯库劳伦特·吉尔吉恩-皮埃尔·莫兰
Owner SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A