CN116517695A - Fan housing and engine nacelle comprising same - Google Patents

Fan housing and engine nacelle comprising same Download PDF

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Publication number
CN116517695A
CN116517695A CN202210064042.6A CN202210064042A CN116517695A CN 116517695 A CN116517695 A CN 116517695A CN 202210064042 A CN202210064042 A CN 202210064042A CN 116517695 A CN116517695 A CN 116517695A
Authority
CN
China
Prior art keywords
fan housing
pressure relief
fan
pressure
housing body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210064042.6A
Other languages
Chinese (zh)
Inventor
徐燕
丁晨
刘钊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AECC Commercial Aircraft Engine Co Ltd
Original Assignee
AECC Commercial Aircraft Engine Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AECC Commercial Aircraft Engine Co Ltd filed Critical AECC Commercial Aircraft Engine Co Ltd
Priority to CN202210064042.6A priority Critical patent/CN116517695A/en
Publication of CN116517695A publication Critical patent/CN116517695A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D29/00—Power-plant nacelles, fairings, or cowlings
    • B64D29/06—Attaching of nacelles, fairings or cowlings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses a fan cover and an engine nacelle comprising the same. The fan cover comprises a fan cover body and a pressure relief part, one end of the pressure relief part is connected to the fan cover body, at least one part of the pressure relief part is made of elastic materials, and the pressure relief part and the fan cover body are used for being covered outside the fan casing; when the pressure in the fan cover rises to a preset threshold value, the pressure relief part deforms, and at least one part of the pressure relief part is opened outwards in the radial direction to form an exhaust passage, so that air in the fan cover is discharged outwards through the exhaust passage. According to the scheme, the pressure relief function under the pipeline blasting working condition is realized through the deformation of the fan cover, a pressure relief door is not required to be arranged on the fan cover, and the weight and the cost of the nacelle fan cover are greatly reduced; the risk that the pressure can not be released in time under the working condition of pipeline blasting is reduced, and the difficulty of fireproof design of the fan cabin is also reduced.

Description

Fan housing and engine nacelle comprising same
Technical Field
The invention relates to the field of aeroengines, in particular to a fairing and an engine nacelle comprising the fairing.
Background
In the conventional nacelle structure, as shown in fig. 1, the nacelle 1 generally includes an air inlet 3, a hanger 2, a fan cover 4' (also called a fan fairing), a thrust reverser 5, and a nozzle 6, where the fan cover 4' is used to wrap the outside of a fan casing, and the fan cover 4', front and rear partition frames of the air inlet 3, and the engine casing form the fan nacelle. An anti-icing bleed air pipeline and an air turbine starter bleed air pipeline are arranged in the fan cabin. When the pipeline is defective, the pipeline can be blasted, so that the pressure in the cabin of the air entraining fan is instantaneously increased, and the damage to accessories in the cabin is caused.
In order to avoid the damage caused by pipeline explosion, the skin of the nacelle fan cover is generally designed with a pressure relief door 7, and when the pipeline explosion occurs, the pressure increased instantaneously triggers the pressure relief door 7 to open so as to reduce the pressure in the nacelle, thereby protecting the accessories in the nacelle.
However, in the prior art, the pressure relief door 7 is typically mounted to the skin of the fan housing 4' by a gooseneck hinge and a pressure relief lock. On the one hand, the gooseneck hinge and the pressure release lock would additionally increase the weight of the skin of the fan housing 4'; on the other hand, the cost of the pressure release lock is high, and the pressure release lock is at risk of being incapable of being opened under the pipeline blasting working condition; in addition, the fan cabin is used as a designated fire area, and the existence of the pressure relief door can further increase the difficulty of fireproof design.
Disclosure of Invention
The invention aims to overcome the defects that a pressure relief door is arranged in the prior art to increase the weight of a fan cover and the risk of incapability of opening exists, and provides the fan cover and an engine nacelle comprising the fan cover.
The invention solves the technical problems by the following technical scheme:
a fan housing for an engine nacelle, the fan housing comprising:
a fan housing body;
one end of the pressure relief part is connected to the fan housing body, at least one part of the pressure relief part is made of elastic materials, and the pressure relief part and the fan housing body are used for being covered outside the fan housing;
when the pressure in the fan cover rises to a preset threshold value, the pressure relief part deforms, and at least one part of the pressure relief part is opened outwards in the radial direction to form an exhaust passage, so that air in the fan cover is discharged outwards through the exhaust passage.
In the scheme, when the engine nacelle is in a normal working environment, the pressure relief part can meet the strength and rigidity requirements of the fan cover; when the pipeline bursts, the internal pressure of the fan cover is suddenly increased, and when the pressure reaches the set pipeline burst minimum pressure (namely the preset threshold value), air is discharged from the exhaust passage, so that the pressure release function is achieved. According to the scheme, the pressure relief function under the pipeline blasting working condition is realized through the deformation of the fan cover, a pressure relief door is not required to be arranged on the fan cover, and the weight and the cost of the nacelle fan cover are greatly reduced; the risk that the pressure can not be released in time under the working condition of pipeline blasting is reduced, and the difficulty of fireproof design of the fan cabin is also reduced.
Preferably, the pressure relief part is connected to a side of the fan housing body away from the air inlet channel of the nacelle along the axial direction of the fan housing.
In the scheme, the pressure relief part is arranged on one side far away from the air inlet channel, so that the influence on the air inlet of the air inlet channel when the pressure relief part deforms can be avoided; because the structure of fan housing body is stronger than pressure release portion, above-mentioned setting can reduce the influence to fan housing aerodynamic performance as far as possible.
Preferably, an end of the pressure relief portion away from the fan housing body is a free end that flares radially outward when the pressure inside the fan housing rises to a preset threshold.
In this scheme, when pressure does not rise, utilize the elasticity of elastic structure can hoop to locate outside the fan receiver, after pressure risees to the threshold value, because the free end of pressure release portion is not connected to any structure, the free end can open smoothly to form above-mentioned exhaust passage.
Preferably, the pressure relief portion has a tear line which remains closed when the pressure inside the fan housing does not rise to a preset threshold, and expands radially outwardly when the pressure inside the fan housing rises to a preset threshold, the tear line being notched to form the vent passage.
In this scheme, the expansion deformation through pressure release portion makes tear line department produce the breach, forms the exhaust passage simply and conveniently. By adopting the arrangement, the two ends of the pressure relief part can be connected with the fan casing, so that the overall structural stability of the fan cover is improved, and the pressure relief part is prevented from falling off when the fan cover works normally.
Preferably, the pressure relief part is in adhesive connection with the fan housing body;
or, the pressure relief part is in plug connection with the fan cover body.
Preferably, the fan housing includes a plurality of connectors distributed along a circumferential direction, one end of each connector is connected to the fan housing body, and the other end of each connector is connected to the pressure release portion, so that the pressure release portion is connected to the fan housing body.
Preferably, the fan housing further comprises ribs arranged along the circumferential direction, the fan housing body and the pressure relief part are covered outside the ribs, and the ribs are used for supporting the fan housing body and the pressure relief part.
In this scheme, through setting up the rib, can improve the structural strength of fan housing, avoid the fan housing to collapse and influence pneumatic performance.
Preferably, the fan cover comprises a plurality of connecting pieces distributed along the circumferential direction, and the connecting pieces are used for connecting the pressure relief part to the fan cover body;
the connecting piece is the rib, the rib includes the roof and the vertical extension board that set up transversely, the extension board be used for connect in the fan receiver, the one end of roof connect in the fan housing body, the other end connect in pressure release portion.
In this scheme, above-mentioned rib is J type rib, through setting up the rib, can be used for improving the structural strength of fan housing on the one hand, on the other hand can realize connecting the pressure release portion on the fan housing body, need not to set up the connecting piece in addition.
Preferably, the elastic material is rubber.
An engine nacelle comprising a fan case and a fan housing as described above.
In the scheme, the fan cover is applied to the engine nacelle, when the pipeline blasting occurs, the pressure relief function under the pipeline blasting working condition is realized through the deformation of the fan cover, and a pressure relief door is not required to be arranged on the fan cover, so that the weight and the cost of the nacelle fan cover are greatly reduced; the risk that the pressure can not be released in time under the working condition of pipeline blasting is reduced, and the difficulty of fireproof design of the fan cabin is also reduced.
On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the invention.
The invention has the positive progress effects that:
for the fan cover, when the engine nacelle is in a normal working environment, the pressure relief part can meet the strength and rigidity requirements of the fan cover; when the pipeline bursts, the pressure in the fan cover is suddenly increased, and when the pressure reaches the set pipeline burst minimum pressure, air is discharged from the exhaust passage, so that the pressure release function is achieved. According to the scheme, the pressure relief function under the pipeline blasting working condition is realized through the deformation of the fan cover, a pressure relief door is not required to be arranged on the fan cover, and the weight and the cost of the nacelle fan cover are greatly reduced; the risk that the pressure can not be released in time under the working condition of pipeline blasting is reduced, and the difficulty of fireproof design of the fan cabin is also reduced.
Drawings
Fig. 1 is a schematic perspective view of an engine nacelle provided with a pressure relief door in the background art.
Fig. 2 is a front view of a fan housing according to a preferred embodiment of the present invention, wherein the fan housing is in a normal operation.
Fig. 3 is a front view of a fan housing according to a preferred embodiment of the present invention, in which the pressure relief portion flares radially outward.
Fig. 4 is a side view of a fan housing according to a preferred embodiment of the present invention.
Fig. 5 is a cross-sectional view of a junction of a fan housing body and a pressure relief portion according to a preferred embodiment of the present invention.
Description of reference numerals in the background:
engine nacelle 1
Hanging 2
Air inlet channel 3
Fan housing 44'
Thrust reverser 5
Nozzle 6
Pressure release door 7
Reference numerals in the present embodiment describe:
fan housing 4
Fan housing body 8
Pressure relief portion 9
Rib 10
Fastener 11
Exhaust passage 12
Detailed Description
The invention is further illustrated by means of examples which follow, without thereby restricting the scope of the invention thereto.
The present embodiment discloses a fan housing 4 for an engine nacelle. As shown in fig. 2-5, the fan housing 4 includes a fan housing body 8 and a pressure relief portion 9, one end of the pressure relief portion 9 is connected to the fan housing body 8, at least a portion of the pressure relief portion 9 is made of an elastic material, and the pressure relief portion 9 and the fan housing body 8 are used for being covered outside the fan casing; when the pressure inside the fan housing 4 rises to a preset threshold value, the pressure relief portion 9 deforms, and at least a part of the pressure relief portion 9 opens radially outwards to form an exhaust passage, so that air inside the fan housing 4 is discharged outwards through the exhaust passage.
In this embodiment, when the nacelle is in a normal working condition, the pressure relief portion 9 may meet the strength and rigidity requirements required by the fan housing 4; when a pipe burst occurs, the pressure inside the fan housing 4 increases suddenly, and when the pressure reaches a set pipe burst minimum pressure (i.e., the above-mentioned preset threshold value), air is discharged from the exhaust passage, thereby achieving a pressure release function. According to the scheme, the pressure relief function under the pipeline blasting working condition is realized through the deformation of the fan cover 4, a pressure relief door is not required to be arranged on the fan cover 4, and the weight and the cost of the nacelle fan cover 4 are greatly reduced; the risk that the pressure can not be released in time under the working condition of pipeline blasting is reduced, and the difficulty of fireproof design of the fan cabin is also reduced.
In this embodiment, the elastic material is rubber, and the rubber is set to be in a normal working environment, so that the pressure release portion 9 can meet the strength and rigidity required by the fan cover 4; when the pressure reaches the preset threshold, the rubber can deform and expand outwards. In other alternative embodiments, other elastic materials may be used as long as the above-described effects are achieved. The fan housing body 8 may be made of a skin material of a general fan housing, such as a carbon fiber composite material, an aluminum alloy, or the like.
In the axial direction of the fan housing 4, the pressure relief portion 9 is connected to a side of the fan housing body 8 remote from the air intake passage of the nacelle. The pressure relief part 9 is arranged on one side far away from the air inlet channel, so that the influence on the air inlet of the air inlet channel when the pressure relief part 9 deforms can be avoided; since the structure of the fan housing body 8 is stronger than the pressure release portion 9, the above arrangement can reduce the influence on the aerodynamic performance of the fan housing 4 as much as possible.
In this embodiment, the pressure relief portion 9 is disposed at the end of the fan housing 4 along the air inlet direction, and in other alternative embodiments, the pressure relief portion 9 may be disposed at other positions of the fan housing 4, for example, connected to a side of the fan housing body 8 near the air inlet channel, or the fan housing body 8 is disposed in two left and right parts, and the pressure relief portion 9 is connected to the middle of the fan housing body 8, so that pressure relief can be achieved.
The end of the pressure release portion 9 away from the fan housing body 8 is a free end which opens radially outwards when the pressure inside the fan housing 4 rises to a preset threshold value. When the pressure is not increased, the fan casing can be hooped outside by the elasticity of the elastic structure, and after the pressure is increased to a threshold value, the free end of the pressure release part 9 is not connected to any structure, so that the free end can be smoothly opened to form the exhaust passage.
It should be noted that, in the present embodiment, the vent passage is formed in such a manner that the free end thereof opens when the pressure increases, and in other alternative embodiments, the vent passage may be formed in other manners, for example, the pressure release portion 9 has a tear line where the pressure inside the fan housing 4 remains closed when the pressure inside the fan housing 4 does not increase to a preset threshold value, and when the pressure inside the fan housing 4 increases to a preset threshold value, the pressure release portion 9 expands radially outward, and a notch is created at the tear line to form the vent passage. Wherein, the expansion deformation of the pressure release part 9 can cause the tear line to generate a notch, so that the exhaust passage is simply and conveniently formed. By adopting the arrangement, the two ends of the pressure relief part 9 can be connected with the fan casing, so that the overall structural stability of the fan cover 4 is improved, and the pressure relief part 9 is prevented from falling off when the fan cover 4 works normally.
The pressure relief part 9 is connected with the fan housing body 8 in a plug-in connection. The fan housing 4 includes a plurality of connecting pieces distributed along the circumferential direction, one end of each connecting piece is connected to the fan housing body 8, and the other end is connected to the pressure release portion 9, so that the pressure release portion 9 is connected to the fan housing body 8. Specifically, the connecting piece is fixedly arranged on the fan casing, and the fan cover body 8 and the pressure relief portion 9 are both connected to the connecting piece, so that the fan cover body 8 and the pressure relief portion 9 are connected to the fan casing.
On the one hand, the pressure relief part 9 is connected to the fan housing body 8 through a connecting piece, and on the other hand, the fan housing body 8 and the pressure relief part 9 are connected to the fan casing through a connecting piece. The fan housing 4 further includes ribs 10 disposed along a circumferential direction, the fan housing body 8 and the pressure relief portion 9 are covered outside the ribs 10, and the ribs 10 are used for supporting the fan housing body 8 and the pressure relief portion 9. By providing the ribs 10, the structural strength of the fan housing 4 can be improved, and the influence on the aerodynamic performance due to collapse of the fan housing 4 can be avoided.
The fan housing 4 has a left-right two-flap opening and closing structure. Wherein each fan housing 4 is composed of a fan housing body 8, a pressure relief part 9 and ribs 10.
The fan housing 4 comprises a plurality of connecting pieces distributed along the circumferential direction, and the connecting pieces are used for connecting the pressure relief part 9 on the fan housing body 8; the connecting piece is the rib 10 in the present embodiment. By providing the ribs 10, on the one hand, the structural strength of the fan housing 4 can be improved, and on the other hand, the pressure relief portion 9 can be connected to the fan housing body 8 without providing a connecting member.
Specifically, the rib 10 includes a top plate disposed transversely and an extension plate disposed vertically, the extension plate is used for being connected to the fan casing, one end of the top plate is connected to the fan housing body 8, and the other end is connected to the pressure relief portion 9. The rib 10 is a J-shaped rib 10. As shown in fig. 5, fasteners 11 are provided at the overlapping portions of the fan housing body 8 and the top plate and the overlapping portions of the pressure release portion 9 and the top plate, and the fan housing body 8 and the top plate and the pressure release portion 9 and the top plate are connected by the fasteners 11.
In this embodiment, the rib 10 is a connecting member, and in other alternative embodiments, a connecting member may be separately provided to connect the pressure relief portion 9 to the fan housing body 8. In other alternative embodiments, a separate connector may be provided to connect the pressure relief portion 9 and the fan housing body 8 together to the fan case.
In this embodiment, the rib 10 is used to connect the pressure relief portion 9 to the fan housing body 8 in a plugging manner, and in other alternative embodiments, the pressure relief portion 9 and the fan housing body 8 may be connected in other manners, such as by gluing.
The present embodiment also discloses an engine nacelle comprising a fan casing and a fan housing 4 as described above.
In the embodiment, the fan cover 4 is applied to the nacelle, when the pipeline blasting occurs, the pressure relief function under the pipeline blasting working condition is realized through the deformation of the fan cover 4, and a pressure relief door is not required to be arranged on the fan cover 4, so that the weight and the cost of the nacelle fan cover 4 are greatly reduced; the risk that the pressure can not be released in time under the working condition of pipeline blasting is reduced, and the difficulty of fireproof design of the fan cabin is also reduced.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.

Claims (10)

1. A fan housing for an engine nacelle, the fan housing comprising:
a fan housing body;
one end of the pressure relief part is connected to the fan housing body, at least one part of the pressure relief part is made of elastic materials, and the pressure relief part and the fan housing body are used for being covered outside the fan housing;
when the pressure in the fan cover rises to a preset threshold value, the pressure relief part deforms, and at least one part of the pressure relief part is opened outwards in the radial direction to form an exhaust passage, so that air in the fan cover is discharged outwards through the exhaust passage.
2. The fan housing of claim 1, wherein the pressure relief portion is connected to a side of the fan housing body away from an intake passage of the nacelle in an axial direction of the fan housing.
3. The fan housing of claim 2, wherein an end of the relief portion remote from the fan housing body is a free end that flares radially outward when the pressure inside the fan housing rises to a preset threshold.
4. The fan housing of claim 1, wherein the relief portion has a tear line that remains closed when the pressure inside the fan housing does not rise to a preset threshold, and expands radially outward when the pressure inside the fan housing rises to a preset threshold, the tear line creating a gap to form the vent passageway.
5. The fan housing of claim 1, wherein the pressure relief portion is adhesively connected to the fan housing body;
or, the pressure relief part is in plug connection with the fan cover body.
6. The fan housing of claim 1, wherein the fan housing includes a plurality of circumferentially distributed connectors, one end of the connectors being connected to the fan housing body and the other end being connected to the pressure relief portion to connect the pressure relief portion to the fan housing body.
7. The fan housing of claim 1, further comprising ribs disposed circumferentially, the fan housing body and the pressure relief portion being housed outside of the ribs, the ribs being configured to support the fan housing body and the pressure relief portion.
8. The fan housing of claim 7, wherein the fan housing includes a plurality of circumferentially distributed connectors for connecting the pressure relief portion to the fan housing body;
the connecting piece is the rib, the rib includes the roof and the vertical extension board that set up transversely, the extension board be used for connect in the fan receiver, the one end of roof connect in the fan housing body, the other end connect in pressure release portion.
9. The fan housing of claim 1, wherein the resilient material is rubber.
10. An engine nacelle comprising a fan casing and a fan housing according to any one of claims 1-9.
CN202210064042.6A 2022-01-20 2022-01-20 Fan housing and engine nacelle comprising same Pending CN116517695A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210064042.6A CN116517695A (en) 2022-01-20 2022-01-20 Fan housing and engine nacelle comprising same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210064042.6A CN116517695A (en) 2022-01-20 2022-01-20 Fan housing and engine nacelle comprising same

Publications (1)

Publication Number Publication Date
CN116517695A true CN116517695A (en) 2023-08-01

Family

ID=87389071

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210064042.6A Pending CN116517695A (en) 2022-01-20 2022-01-20 Fan housing and engine nacelle comprising same

Country Status (1)

Country Link
CN (1) CN116517695A (en)

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