CN119957320A - Lightweight noise reduction blade and blade lightweight noise reduction design method - Google Patents
Lightweight noise reduction blade and blade lightweight noise reduction design method Download PDFInfo
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- CN119957320A CN119957320A CN202311477342.8A CN202311477342A CN119957320A CN 119957320 A CN119957320 A CN 119957320A CN 202311477342 A CN202311477342 A CN 202311477342A CN 119957320 A CN119957320 A CN 119957320A
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Abstract
The quantitative noise reduction design method comprises the steps of classifying a circle of blades distributed in the circumferential direction according to bearing capacity, obtaining multiple types of blades according to different bearing capacities, designing the type of blades with the smallest bearing capacity by using hollow noise reduction blades, and not designing the type of blades with the largest bearing capacity by using the hollow noise reduction blades. The lightweight noise reduction blade comprises a blade body, a pair of cover plates, a noise reduction plate and a pair of honeycomb structures, wherein the blade body comprises a frame and a hollow cavity positioned in the frame, the pair of cover plates are respectively arranged on two sides of the blade to seal the hollow cavity, the noise reduction plate is positioned in the hollow cavity and is arranged between the pair of cover plates, and the pair of honeycomb structures are respectively arranged between the cover plates and the noise reduction plate. According to the method, the lightweight noise reduction design of the blades is performed on the basis of classifying the blades, so that the safety is ensured, and the design target of lightweight noise reduction can be achieved.
Description
Technical Field
The invention relates to the field of aeroengines, in particular to the field of blade structural design.
Background
With the development of aeroengines, a design of fusion of the fan OGV and the support plate has emerged. The OGV support plate and the blades which are integrated have the functions of transmitting load and bearing and serving as outlet diversion. In addition, the fan outer culvert OGV design also needs to have qualified noise reduction performance, such as noise reduction realized through fillers such as honeycomb structures.
However, noise reduction designs and lightweight designs are generally contradictory. The use of lighter materials and structural features often means that safety problems such as insufficient structural rigidity and insufficient strength margin can occur, while the use of noise reduction blade type designs means that noise absorbing materials or features are introduced in the aspects of structural design, material application and the like, so that the weight of the blade can be improved to a certain extent, and accordingly, higher challenges are also presented to the overall safety.
Disclosure of Invention
The invention aims to provide a lightweight noise reduction design method for a blade.
It is another object of the present invention to provide a lightweight noise reduction blade.
The design method for the lightweight noise reduction of the blades for achieving the purpose comprises the following steps of S1, classifying a circle of blades distributed in the circumferential direction according to bearing capacity, obtaining multiple types of blades according to different bearing capacities, S2, designing the type of blades with the least bearing capacity by using hollow noise reduction blades, and not designing the type of blades with the most bearing capacity by using the hollow noise reduction blades.
The lightweight noise reduction blade for achieving the purpose comprises a blade body, a pair of cover plates, a noise reduction plate and a pair of honeycomb structures, wherein the blade body comprises a frame and a hollow cavity positioned in the frame, the pair of cover plates are respectively arranged on two sides of the blade to seal the hollow cavity, the noise reduction plate is arranged between the pair of cover plates and positioned in the hollow cavity, and the pair of honeycomb structures are respectively arranged between the cover plates and the noise reduction plate.
In one or more embodiments, the cover plate is provided with a sound deadening hole corresponding to the honeycomb structure.
In one or more embodiments, the sound deadening holes provided on the cover plate on the blade back side of the blade are tapered holes with a 45 ° taper angle.
In one or more embodiments, the honeycomb structure includes a plurality of honeycomb cells, each of the honeycomb cells including a center cell in a center portion and an annular cell surrounding the center cell.
In one or more embodiments, each of the honeycomb units includes a sound deadening hole provided on the cover plate, and a sound transmitting hole provided on a wall surface of the center honeycomb for communicating the center honeycomb with each of the annular honeycombs.
In one or more embodiments, the cover plate is configured to be adhered to the honeycomb structure and the blade body by a glue film, and the honeycomb structure is configured to be glued to the muffler plate.
In one or more embodiments, the muffler plate is made of a resin composite material.
In one or more embodiments, the muffler plate is an elastic material.
In one or more embodiments, the honeycomb structure is made of aluminum alloy honeycomb.
According to the blade lightweight noise reduction design method, on the basis of subdividing blade bearing capacity layout, noise reduction lightweight designs of different blades are carried out according to bearing capacities of different blades, the blades with the largest bearing capacity are not subjected to lightweight designs, bearing functions and safety of the blades are guaranteed, hollow designs are carried out on the blades with the smallest bearing capacity, light weight is achieved through a hollow structure, and noise reduction is achieved through noise reduction holes, honeycomb structures and noise reduction plates on a cover plate. Therefore, on the premise of meeting the safety, the design of the lightweight noise reduction blade is effectively developed, and the contradiction in the traditional design is solved.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description in conjunction with the accompanying drawings and embodiments, in which:
FIG. 1 is a schematic illustration of a blade classification;
FIG. 2 is a component split view of one embodiment of a lightweight noise reduction blade;
FIG. 3 is a transverse cross-sectional view of one embodiment of a lightweight noise reduction blade;
FIGS. 4A-4B are schematic views of lightweight noise reduction blades;
FIGS. 5A-5B are schematic illustrations of a honeycomb structure;
FIG. 6 is a diagram of the design of the cover plate sound deadening holes;
FIG. 7 is a cross-sectional view of the N-N position of FIG. 6;
fig. 8 is a flowchart of a blade lightweight noise reduction design method.
Sign mark description
10. Blade body
11. Frame
12. Hollow cavity
20. Cover plate
21. Leaf back cover plate
22. Leaf basin cover plate
30. Silencing plate
40. Honeycomb structure
41. Leaf back side honeycomb
42. Leaf basin side honeycomb
44. Silencing hole
45. Sound transmission hole
400. Honeycomb unit
401. Honeycomb
410. Center honeycomb
420. Annular honeycomb
Detailed Description
The present invention will be further described with reference to specific embodiments and drawings, in which more details are set forth in the following description in order to provide a thorough understanding of the present invention, but it will be apparent that the present invention can be embodied in many other forms than described herein, and that those skilled in the art may make similar generalizations and deductions depending on the actual application without departing from the spirit of the present invention, and therefore should not be construed to limit the scope of the present invention in terms of the content of this specific embodiment.
It is noted that these and other figures are merely examples, which are not drawn to scale and should not be construed as limiting the scope of the invention as it is actually claimed.
The lightweight noise reduction design method for the blade can efficiently develop the lightweight noise reduction blade design on the premise of meeting safety.
Firstly, classifying a circle of blades distributed circumferentially according to bearing capacity to obtain multiple types of blades according to different bearing capacities, then, designing a hollow noise reduction blade for the type of blades with the least bearing capacity, and not designing noise reduction for the type of blades with the most bearing capacity.
Specifically, taking the outlet guide vane (Outlet Guide Vane, OGV) of the fan shown in fig. 1 as an example, the fan OGV has 48 blades in a circle, and the 48 fan OGV blades are classified into four stages according to the bearing load.
The first stage bearing a is 12 o 'clock and 6 o' clock or two blades nearest to 12 o 'clock and 6 o' clock positions, which serve as the main fan OGV, providing the main rigidity and bearing, preferably selected from TC4 titanium alloy. The second-stage bearing B is two adjacent blades positioned at 12 o 'clock or nearest to 12 o' clock and positioned on the first-stage bearing, and auxiliary rigidity and bearing are provided for the first-stage bearing, and TC4 titanium alloy is preferable.
The blades of the fourth stage bearing C and the third stage bearing D are circumferentially arranged alternately, the blade close to the blade of the second stage bearing is the blade of the fourth stage bearing, and the blade close to the 6 o 'clock of the first stage bearing or the blade closest to the 6 o' clock is the blade of the third stage bearing. Thus, the third stage bearing comprises 24 fan OGVs which are arranged at intervals, and the material is preferably selected from aluminum alloy materials, and the fourth stage bearing comprises 22 fan OGVs which are arranged at intervals, and the material is preferably selected from aluminum alloy materials.
Therefore, the blades are graded according to the bearing of the blades, and on the premise of defining the bearing of the blades at all levels, proper materials and structures are selected according to the rigidity and bearing of the blades at different levels, so that the design of blade noise reduction can be carried out on the premise of meeting the safety. The noise reduction design is not carried out on the first stage bearing blade with the largest bearing capacity, because the bearing capacity is mainly carried out, and the weight of the fourth stage bearing blade with the smallest bearing capacity can be properly reduced, so that the hollow noise reduction blade design is adopted.
It will be appreciated by those skilled in the art that blade classification includes, but is not limited to, using the classification scheme shown in FIG. 1, and that the specific classification is determined based on the actual load carried by the blade, and that the number of stages is not limited to the four types mentioned in the embodiments above.
The lightweight noise reduction blade structure shown in fig. 2 to 4B may be employed as a type of blade having the smallest bearing capacity, and includes a blade body 10, a pair of cover plates 20, a muffler plate 30, and a pair of honeycomb structures 40.
The vane body 10 includes a rim 11 and a hollow cavity 12 in the rim 11, and a pair of cover plates 20 are respectively provided at both sides of the vane to close the hollow cavity 12 and form a tub 13 and a back 14 of the vane. The cover plate on the side of the blade back 14 is referred to as a blade back cover plate 21, and the cover plate on the side of the blade basin 13 is referred to as a blade basin cover plate 22, as shown in fig. 3. The hollow cavity 12 occupies the main body space of the blade, including the blade root side and the blade tip side, which will greatly achieve the weight reduction effect.
The muffler plate 30 is disposed between the back cover plate 21 and the basin cover plate 22 and is located within the hollow cavity 12. The acoustical panel 30 may be made of a resin-based composite material including, but not limited to, aramid, polyimide, S2 fiberglass, and the like.
The muffler plate 30 may be made of an elastic material having a certain elasticity, and may be inserted into the hollow chamber 12 by pressing.
The honeycomb structure 40 is disposed between the cover plate 10 and the muffler plate 30, respectively, forming a vane back side honeycomb 41 and a vane bowl side honeycomb 42. The inside of the vane back side honeycomb 41 and the vane basin side honeycomb 42 are adhered to the intermediate muffler plate 30 by a glue film, and the outside is adhered to the cover plate 10 by a glue film.
The honeycomb structure is preferably a high-bending-strength aluminum alloy honeycomb, so that the integral rigidity can be ensured, and a resin-based composite honeycomb can be adopted.
Like this, leaf basin side apron, honeycomb, acoustical panel have formed leaf basin side amortization chamber jointly, and leaf back side apron, honeycomb, acoustical panel have formed leaf back side amortization chamber jointly, make the blade that this level bore form the two amortization chamber structures in leaf basin and leaf back both sides, and the furthest reduces fan back and passes noise.
The honeycomb structure 40 includes a plurality of honeycomb units 400, and each honeycomb unit 400 includes a plurality of cells 401. The honeycomb unit 400 includes a central honeycomb 410 located in the middle and a plurality of circumferential honeycomb 420 surrounding the outer periphery of the central honeycomb 410.
Those skilled in the art will appreciate that the central honeycomb 410 and the circumferential honeycomb 420 include, but are not limited to, the hexagonal honeycomb structure shown in fig. 5A.
Each honeycomb unit 400 includes a sound deadening hole 44 provided in the cover plate 20, and a sound transmitting hole 45 provided in the wall surface of the center honeycomb 410, with the sound deadening hole 44 provided in the cover plate corresponding to the upper side of the middle honeycomb lattice. That is, the "one-pass six-pass" sound deadening design is adopted, and the central honeycomb 410 communicated with the outside is communicated with the plurality of annular honeycomb 420 of the partition wall through the plurality of gate-shaped sound transmission holes 45, as shown in fig. 5A and 5B. Through honeycomb lattice and acoustical panel, can be maximum, the sound wave energy that gets into of fastest dissipation to play the effect of promoting the noise reduction.
The surfaces of the leaf basin cover plate 22 and the leaf back cover plate 21 are respectively provided with a silencing hole 44, and the silencing holes 44 are preferably conical holes with a cone angle of 45 degrees so as to absorb sound waves and reduce the back transmission noise of the fan. The center cell of each cell 400 "one-pass six-pass" cell lattice corresponds to a tapered sound deadening hole 44.
The bowl cover 22 and the back cover 21 are adhered to the honeycomb structure 40 and the frame 11 of the blade body 10 by adhesive films.
The lightweight noise reduction blade adopts lightweight honeycomb and a composite material sound attenuation plate to replace aluminum alloy, and the lightweight noise reduction blade is matched with a hollow cavity to achieve the effect of weight reduction. Thus, for the fourth stage carrying fan OGV blade with the least bearing capacity, the blade can be expected to reduce weight by 45 percent, the comprehensive noise reduction is more than 2db, and the weight reduction design is not carried out for the blades with other bearing grades.
Therefore, the lightweight design of the blades is carried out according to the rigidity and bearing classification of different blades, so that the overall safety of the blades is ensured, the lightweight noise reduction design is realized, the lightweight noise reduction blade design is efficiently developed on the premise of meeting the safety, and the contradiction in the traditional design is solved.
The application uses specific words to describe embodiments of the application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the application may be combined as suitable.
While the invention has been described in terms of preferred embodiments, it is not intended to be limiting, but rather to the invention, as will occur to those skilled in the art, without departing from the spirit and scope of the invention. Therefore, any modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention fall within the protection scope defined by the claims of the present invention.
Claims (10)
1. The lightweight noise reduction design method for the blade is characterized by comprising the following steps of:
s1, classifying a circle of blades distributed circumferentially according to bearing capacity, and obtaining multiple types of blades according to different bearing capacities;
s2, designing hollow noise reduction blades for the type of blades with the least bearing capacity, and not designing noise reduction for the type of blades with the most bearing capacity.
2. A lightweight noise reduction blade, characterized in that it is obtained by a method according to claim 1, of the type having the least bearing capacity, comprising:
The blade body comprises a frame and a hollow cavity positioned in the frame;
The cover plates are respectively arranged at two sides of the blade to seal the hollow cavity;
A muffler plate disposed between the pair of cover plates and located in the hollow cavity, and
And a pair of honeycomb structures respectively disposed between the cover plate and the muffler plate.
3. The lightweight noise reduction blade according to claim 2, wherein the cover plate is provided with noise reduction holes corresponding to the honeycomb structure.
4. A lightweight noise reduction blade according to claim 3, wherein the sound deadening hole provided in the cover plate on the blade back side of the blade is a tapered hole having a taper angle of 45 °.
5. The lightweight noise reduction blade of claim 3, wherein the honeycomb structure comprises a plurality of honeycomb cells, each of the honeycomb cells comprising a central honeycomb in the middle and an annular honeycomb surrounding the central honeycomb.
6. The lightweight noise reduction blade according to claim 5, wherein each of the honeycomb units includes a sound deadening hole provided on the cover plate, and a sound transmitting hole provided on a wall surface of the center honeycomb for communicating the center honeycomb with each of the annular honeycombs.
7. The lightweight noise reduction blade according to claim 2, wherein the cover plate is configured to be bonded to the honeycomb structure and the blade body by a glue film, the honeycomb structure being configured to be glued to the muffler plate.
8. The lightweight noise reduction blade according to claim 2, wherein the noise reduction plate is made of a resin composite material.
9. The lightweight noise reduction blade according to claim 2, wherein the sound attenuation plate is an elastic material.
10. The lightweight noise reduction blade according to claim 2, wherein the honeycomb structure is made of aluminum alloy honeycomb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311477342.8A CN119957320A (en) | 2023-11-07 | 2023-11-07 | Lightweight noise reduction blade and blade lightweight noise reduction design method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311477342.8A CN119957320A (en) | 2023-11-07 | 2023-11-07 | Lightweight noise reduction blade and blade lightweight noise reduction design method |
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| CN119957320A true CN119957320A (en) | 2025-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311477342.8A Pending CN119957320A (en) | 2023-11-07 | 2023-11-07 | Lightweight noise reduction blade and blade lightweight noise reduction design method |
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Citations (9)
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|---|---|---|---|---|
| US3647021A (en) * | 1970-06-22 | 1972-03-07 | Rohr Corp | Sound suppression system |
| US5474421A (en) * | 1993-07-24 | 1995-12-12 | Mtu Motoren- Und Turbinen- Union Muenchen Gmbh | Turbomachine rotor |
| GB2361035A (en) * | 2000-04-07 | 2001-10-10 | Rolls Royce Plc | Gas turbine engine vane with noise attenuation features |
| CN101649844A (en) * | 2009-09-09 | 2010-02-17 | 北京戴诺新思动力技术有限公司 | Fan blade based on hollow metal/composite material structure |
| CN102597477A (en) * | 2009-09-17 | 2012-07-18 | 沃尔沃航空公司 | A noise attenuation panel and a gas turbine component comprising a noise attenuation panel |
| CN204001691U (en) * | 2014-08-15 | 2014-12-10 | 民勤县华安再生资源开发有限公司 | There is the thermal insulation separation figure Wood-plastic formwork of cellular structure |
| CN105736462A (en) * | 2014-12-12 | 2016-07-06 | 中航商用航空发动机有限责任公司 | Hollow blade and aircraft engine |
| CN114992161A (en) * | 2021-03-01 | 2022-09-02 | 中国航发商用航空发动机有限责任公司 | Fan blade, aircraft engine and manufacturing method of fan blade |
| CN116330680A (en) * | 2023-05-19 | 2023-06-27 | 无锡透平叶片有限公司 | Bonding assembly method for hollow fan outlet guide vane |
-
2023
- 2023-11-07 CN CN202311477342.8A patent/CN119957320A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3647021A (en) * | 1970-06-22 | 1972-03-07 | Rohr Corp | Sound suppression system |
| US5474421A (en) * | 1993-07-24 | 1995-12-12 | Mtu Motoren- Und Turbinen- Union Muenchen Gmbh | Turbomachine rotor |
| GB2361035A (en) * | 2000-04-07 | 2001-10-10 | Rolls Royce Plc | Gas turbine engine vane with noise attenuation features |
| CN101649844A (en) * | 2009-09-09 | 2010-02-17 | 北京戴诺新思动力技术有限公司 | Fan blade based on hollow metal/composite material structure |
| CN102597477A (en) * | 2009-09-17 | 2012-07-18 | 沃尔沃航空公司 | A noise attenuation panel and a gas turbine component comprising a noise attenuation panel |
| CN204001691U (en) * | 2014-08-15 | 2014-12-10 | 民勤县华安再生资源开发有限公司 | There is the thermal insulation separation figure Wood-plastic formwork of cellular structure |
| CN105736462A (en) * | 2014-12-12 | 2016-07-06 | 中航商用航空发动机有限责任公司 | Hollow blade and aircraft engine |
| CN114992161A (en) * | 2021-03-01 | 2022-09-02 | 中国航发商用航空发动机有限责任公司 | Fan blade, aircraft engine and manufacturing method of fan blade |
| CN116330680A (en) * | 2023-05-19 | 2023-06-27 | 无锡透平叶片有限公司 | Bonding assembly method for hollow fan outlet guide vane |
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