CN115492649A - Cartridge receiver device reaches aeroengine including it - Google Patents

Abstract

The invention discloses a cartridge receiver device and an aircraft engine comprising the same, wherein the cartridge receiver device comprises a cartridge receiver body, a plurality of sheet bodies are arranged on the inner wall of the cartridge receiver body, each sheet body is provided with a root part and a suspension end part, the root parts are connected to the cartridge receiver body, and the suspension end parts and at least one adjacent sheet body are overlapped in the radial direction of the cartridge receiver body and have radial gaps. The root of lamellar body is connected in the machine casket body, unsettled tip is unsettled and stretches out, therefore the lamellar body is the structure similar to the cantilever beam, when taking place the blade and fly off, cracked fan blade strikes the lamellar body earlier, the lamellar body takes place to buckle and warp or even fracture, the lamellar body of buckling drives and takes place to buckle by its adjacent lamellar body that covers and overlap, and with this mode one by one will warp and propagate for a plurality of lamellar bodies, utilize the buckling of a plurality of lamellar bodies to absorb impact energy, thereby impact load has been dispersed, the blade that the suppression flies off transmits impact load for the machine casket body, with this structural integrity who guarantees the machine casket body.

Description

Cartridge receiver device reaches aeroengine including it

Technical Field

The invention relates to the field of aircraft engines, in particular to a case device and an aircraft engine comprising the same.

Background

The fan-containing casing of the turbofan engine plays an important role in the working process of the engine. The fan blade protection structure not only provides an inlet channel for external air passing through the fan, but also plays a certain protection role for the fan blade. In order to prevent the fan blades from being broken due to failure and even flying out to cause airplane crash and personal casualties, the fan blades are required to have a containing function. The earliest containing casings adopt metal structures, and since the 20 th century and the 70 th century, with the increasingly mature technologies of composite materials and the like, various novel containing technologies develop. The CFM56 series engine uses a pure metal fan case.

The CFM56 series engine fan containing casing is formed by welding 3 circular rings made of 17-4PH stainless steel and 12 reinforcing ribs. Because the weight of the fan containing casing is larger, the corresponding assembly cost and fuel consumption are higher. Including another widely used titanium alloy containing casing, is one of the heaviest components in the engine, and directly affects the efficiency of the engine. In the prior art, a multi-layer casing structure is adopted to improve the impact resistance of the casing, but the machining difficulty of the casing is high, and the cost is high.

How to improve the impact capability of the anti-fracture fan blade of the casing by a light and simple structure is a problem to be solved in the field.

Disclosure of Invention

The invention aims to overcome the defect of meeting the impact resistance in the prior art, and provides a casing device and an aircraft engine comprising the same.

The invention solves the technical problems through the following technical scheme:

the utility model provides a cartridge receiver device, cartridge receiver device includes the cartridge receiver body, a plurality of lamellar bodies are installed to the inner wall of cartridge receiver body, the lamellar body has root and unsettled tip, the root connect in the cartridge receiver body, unsettled tip and at least one adjacent the lamellar body is in the footpath of cartridge receiver body overlaps and there is radial clearance.

In this scheme, the root of lamellar body is connected in the machine casket body, unsettled tip is unsettled to stretch out, therefore the lamellar body is the structure similar to the cantilever beam, when taking place the blade and fly to take off, cracked fan blade strikes earlier on the lamellar body, the lamellar body takes place to buckle and warp or even fracture, the lamellar body drive of buckling is buckled takes place to buckle by its adjacent lamellar body that covers and overlap, and with this mode one by one with warping and spreading for a plurality of lamellar bodies, utilize the buckling absorption impact energy of a plurality of lamellar bodies, thereby impact load has been dispersed, the suppression flies the blade that takes off and transmits impact load for the machine casket body, with this structural integrity who guarantees the machine casket body.

In addition, the structure of the sheet body improves the impact resistance of the casing, ensures the containment of the casing, has smaller introduced mass, can correspondingly reduce the reinforcing structure on the casing, and is favorable for the light weight of an engine.

Preferably, the casing device includes a plurality of sheet body rows, and the sheet body rows include a plurality of sheet bodies arranged along the same row.

In this scheme, the lamellar body is arranged in rows into the lamellar body and is arranged, so the range of lamellar body is comparatively neat, the law, guarantees that the contained region of whole machine casket body can both be covered by the lamellar body, no matter the blade strikes any region on the machine casket body, can both have lamellar body shock-absorbing capacity. Preferably, said blades of the same blade row are arranged axially or circumferentially of said casing device, so as to form a blade array, the blades being completely distributed over the housing area of the casing body.

Preferably, the suspended ends of the blades extend toward the adjacent blade row.

In this scheme, the lamellar body that a lamellar body was arranged takes place to buckle, can arrange transmission impact energy to adjacent lamellar body to transmit in proper order and arrange for more lamellar bodies, thereby disperse impact load better, reduce the deformation of quick-witted casket body.

Preferably, the sheets in the sheet row are arranged along the axial direction of the casing body, and the suspended end portions of the sheets in the same sheet row extend towards the same side.

In this scheme, a plurality of lamellar bodies are arranged in the circumference of casket body step by step, and the lamellar body can transmit the impact step by step along circumference annular, therefore under some circumstances, each lamellar body row can both take place the lamellar body and buckle, absorb impact energy, consequently can utilize the lamellar body as much as possible to better dispersed load avoids impact load to concentrate on certain local, reduces the cracked possibility of casket body.

Preferably, a single said lobe overlaps at least two said lobes in adjacent said row of lobes.

In this scheme, when single lamellar body took place to buckle, because the lamellar body overlaps with two at least lamellar bodies simultaneously, consequently the kinetic energy of single lamellar body can transmit for more lamellar bodies to realize the effect that the dispersion was strikeed better. For example, the lobes of two adjacent lobe rows may be staggered, i.e., the lobes may extend toward an area between two adjacent lobes in the adjacent lobe rows.

Preferably, the casing device further comprises a sheet layer group, the sheet layer group comprises a plurality of sheets, and an overlapping area exists between adjacent sheets in the sheet layer.

In this scheme, the lamellar body bed series is multilayer structure, also has radial clearance between the lamellar body in the lamellar body bed series, and blade in the lamellar body bed series can the successive layer become invalid, consequently can transmit impact energy in the lamellar body bed series, and the lamellar body arranges comparatively compactly to increase lamellar body quantity as much as possible, realize absorbing impact load's purpose betterly. Preferably, a plurality of lamellar group sets can be arranged in rows to ensure that each part of the case body is covered by a lamellar. In a single sheet layer series, the individual sheets can be of different sizes, wherein the smaller sheets are located radially inside the larger sheets in the housing body, in order to utilize the transmission of the bending deformation.

Preferably, the blade narrows from the root towards the free end.

In this scheme, the size of lamellar body root is great to do benefit to the reliable connection between lamellar body and the quick-witted casket body, the size of unsettled tip is less, thereby reduces cantilever load, with this guarantee can not take place to be not conform to the anticipated lamellar body and drop because loads such as the vibration of engine under operating condition.

Preferably, the material of the sheet is the same as that of the casing body.

In this scheme, the lamellar body adopts the same material with the receiver body, and the material property is the same, is favorable to the firm joint between lamellar body and the receiver body, especially under the condition that the lamellar body is connected to the receiver body through the mode of welding or 3D printing.

Preferably, the sheet is a shape memory alloy.

In the scheme, the shape memory alloy has high plasticity, and can absorb more energy when being impacted, so that the influence of the impact energy on the casing body is reduced.

Preferably, the sheet body is provided with antifriction concave holes, and the aperture of the antifriction concave holes of the sheet body is 10-100 times that of the antifriction concave holes.

In this scheme, the antifriction shrinkage pool can reduce the surface friction of lamellar body, and this makes when flying the blade that takes off and the contact takes place for the lamellar body, and the blade slides relatively more easily to restrain the blade and to the transmission impact load of quick-witted casket body, reduce the possibility that the quick-witted casket body takes place to warp.

Preferably, the extending direction of the suspending end part and the rotating direction of the fan are forward.

In the scheme, the extension direction of the suspended end part is basically the same as the tangential direction of the rotation direction of the fan, and even if the fan blades are scratched to the sheet bodies under the condition of no flying off due to bumping vibration, the sheet bodies are not easy to knock off by the fan, so that the possibility of undesirable falling off of the sheet bodies is reduced and even avoided.

In other words, if the extending direction of the suspended end part is opposite to the rotating direction of the fan, that is, the extending direction of the suspended end part is basically opposite to the tangential direction of the rotating direction of the fan, once the fan and the sheet body are scratched, the sheet body is easily knocked off, so that the sheet body fails in advance, and even the fan is damaged.

Preferably, the sheet body is one or more of a semicircular sheet, a trapezoidal sheet, a triangular sheet, a rectangular sheet and a fish scale-shaped sheet.

In this scheme, can select the lamellar body of different shapes according to actual demand and restriction (for example processing degree of difficulty and intensity rigidity demand). The shapes of all the sheet bodies in the same case device can be the same, and also can be the combination of sheet bodies with various shapes.

An aircraft engine comprising a casing arrangement as described above.

In this scheme, aeroengine is through using above-mentioned machine casket device, and when the fan blade flew to take off, the blade that flies to take off takes place the contact with the lamellar body earlier, and the buckling of lamellar body can absorb impact load, and the buckling of a lamellar body can drive other lamellar bodies and also take place to buckle to disperse impact load to wider scope, thereby guarantee the structural integrity of machine casket body.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The positive progress effects of the invention are as follows: according to the cartridge receiver device, the sheet body similar to the cantilever beam structure is arranged on the cartridge receiver body, when the blades are in flying off, the broken fan blades firstly impact the sheet body, the sheet body is bent, deformed and even broken, the bent sheet body drives the adjacent sheet bodies covered and overlapped by the bent sheet body to be bent, and the deformation is transmitted to the plurality of sheet bodies one by one in the way, the bending of the plurality of sheet bodies is utilized to absorb the impact energy, so that the impact load is dispersed, the flying off blades are inhibited from transmitting the impact load to the cartridge receiver body, and the structural integrity of the cartridge receiver body is ensured; through the structure, the impact resistance of the casing body can be ensured without arranging an additional reinforcing structure, so that the weight of the casing device is reduced. The aero-engine with the casing device has the advantages of good impact resistance, light weight and simplicity in processing.

Drawings

Fig. 1 is a schematic internal structural view of an aircraft engine according to embodiment 1 of the present invention;

fig. 2 is a schematic internal structural view of a casing device according to embodiment 1 of the present invention;

fig. 3 is a schematic structural view of a sheet body of a casing device according to embodiment 1 of the present invention;

fig. 4 is a schematic structural view of a sheet body of a casing device according to embodiment 2 of the present invention;

fig. 5 is a schematic structural view of a sheet body of a casing device according to embodiment 3 of the present invention;

description of the reference numerals

Fan blade 1

Fan casing 2

Supercharging stage blade 3

Intermediary casing 4

Outlet guide vanes 5

Outlet guide vane casing 6

Casing device 7

Casing body 71

Sheet body 72

Root 721

Hanging end 722

Sheet layer set 8

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

Example 1

In the present embodiment, as shown in fig. 1, the aero-engine includes a fan casing 2 capable of housing a fan blade 1, an intermediate casing 4 capable of housing a booster stage blade 3, and an outlet guide vane casing 6 capable of housing an outlet guide vane 5, an arrow a in fig. 1 is an air intake direction, the casing device 7 in the present embodiment may be any one of the fan casing 2 and the intermediate casing 4, and the casing device 7 may also be a casing for housing a high pressure compressor blade, a high pressure turbine blade, a low pressure turbine blade, and the like, which is not limited in this respect. For convenience of description, the casing device 7 in the present embodiment is exemplified by the fan casing 2.

As shown in fig. 2 and 3, the casing device 7 includes a casing body 71, and the casing body 71 provides overall rigidity. The plurality of sheets 72 are mounted on the inner wall of the casing body 71, each sheet 72 has a root portion 721 and a suspended end portion 722, the root portion 721 is connected to the casing body 71, and the suspended end portion 722 and at least one adjacent sheet 72 are radially overlapped on the casing body 71 and have a radial gap.

The root 721 of the sheet body 72 is connected to the casing body 71, the suspension end 722 is extended in a suspension manner, so the sheet body 72 is similar to a cantilever beam structure, when the blade is in a flying state, the broken fan blade 1 impacts the sheet body 72 first, the sheet body 72 is bent, deformed and even broken, because an overlapping area exists between the suspension end 722 of the sheet body 72 and the adjacent sheet body 72, an arrangement manner similar to a fish scale is formed, the bent sheet body 72 drives the adjacent sheet body 72 which is covered and overlapped by the bent sheet body 72 to be bent, and in this way, the deformation is transmitted to the plurality of sheet bodies 72 one by one, and the bending of the plurality of sheet bodies 72 is utilized to absorb impact energy, so that impact load is dispersed, the blade which is restrained from flying off transmits the impact load to the casing body 71, and the structural integrity of the casing body 71 is ensured.

In addition, the structure of the sheet body 72 improves the impact resistance of the casing, ensures the containment of the casing, has smaller introduced quality, does not need to arrange an additional reinforcing structure on the casing, and even can carry out structural optimization design such as thinning on the casing body 71, thereby correspondingly reducing the weight of the casing and being beneficial to the light weight of an engine.

The integral processing of the casing body 71 and the sheet body 72 can be realized by adopting a 3D printing process, and a multilayer laminated structure layer can also be grown on the casing body 71 in a 3D printing mode.

The sheet body 72 may be distributed over the inner wall of the entire casing body 71, or the sheet body 72 may be disposed only in the containing region of the casing body 71, that is, the region corresponding to the fan blade 1 on the casing body 71, so as to reduce the number of the sheet bodies 72 and the processing difficulty and cost on the premise of ensuring that the sheet body 72 can receive the flying-off blades.

As shown in fig. 3, the casing device 7 includes a plurality of sheet rows including a plurality of sheets 72 arranged along the same row. The sheet bodies 72 are arranged in rows to form sheet body rows, so that the arrangement of the sheet bodies 72 is neat and regular, the containing area of the whole casing body 71 can be covered by the sheet bodies 72, and the sheet bodies 72 can absorb impact capacity no matter any area of the blades impacting the casing body 71. Preferably, the vanes 72 in the same vane row may be arranged along the axial or circumferential direction of the casing arrangement 7, so as to form an array of vanes 72, the vanes 72 completely lining up the housing area of the casing body 71.

The suspended end 722 of the sheet body 72 extends toward the adjacent sheet body row, and the sheet body 72 on one sheet body row is bent, so that impact energy can be transmitted to the adjacent sheet body row and is sequentially transmitted to more sheet body rows, thereby better dispersing impact load and reducing deformation of the casing body 71.

The lamellar bodies 72 in the lamellar body row are arranged along the axial direction of the casing body 71, the suspended end part 722 of the lamellar bodies 72 on the same lamellar body row extends towards the same side, a plurality of lamellar bodies are arranged in the circumferential direction of the casing body 71 step by step, and the lamellar bodies 72 can transmit impact step by step along the circumferential direction in an annular manner, so that under certain conditions, the bending of the lamellar bodies 72 and the absorption of impact energy can both occur on each lamellar body row, and therefore the lamellar bodies 72 can be utilized as much as possible, thereby better dispersing load, avoiding the impact load from concentrating on a certain local area, and reducing the possibility of the casing body 71 cracking.

The single lobe 72 overlaps at least two lobes 72 in adjacent lobe rows. When single lamellar body 72 takes place to buckle, because lamellar body 72 overlaps with at least two lamellar bodies 72 simultaneously, consequently single lamellar body 72's kinetic energy can transmit more lamellar bodies 72 to better realize the effect of dispersed impact. For example, the lobes 72 of two adjacent lobe rows may be staggered, i.e., the lobes 72 may extend toward an area between two adjacent lobes 72 in the adjacent lobe rows.

The case device 7 further includes a sheet layer group 8, where the sheet layer group 8 includes a plurality of sheets 72, and an overlapping area exists between adjacent sheets 72 in the sheets 72. Lamellar body group 8 is multilayer structure, also has radial clearance between the lamellar body 72 in the lamellar body group 8, and the blade in the lamellar body group 8 can become invalid by the successive layer, consequently can transmit impact energy in the lamellar body 72 group 8, and lamellar body 72 arranges comparatively compactly to increase lamellar body 72 quantity as much as possible, realize absorbing impact load's purpose betterly. Preferably, a plurality of sheet layer groups 8 can be arranged in rows to ensure that each part of the casing body 71 is covered by the sheet 72. In the individual blade group 8, the individual blades 72 can be of different sizes, wherein the smaller blades 72 are located radially inside the larger blades 72 in the housing body 71 in order to utilize the transmission of the bending deformation.

Specifically, in the present embodiment, the sheet layer groups 8 are arranged in rows, and the sheets 72 in the sheet layer group 8 in the same row extend toward the same side and overlap with the sheet layer group 8 in the adjacent row.

The sheet body 72 narrows from the root portion 721 toward the suspended end portion 722, the root portion 721 of the sheet body 72 has a large size, which is favorable for reliable connection between the sheet body 72 and the casing body 71, and the suspended end portion 722 has a small size, which reduces the cantilever load, thereby ensuring that the sheet body 72 will not fall off unexpectedly due to loads such as vibration of the engine under the working state. Further, the thickness of the root 721 of the blade 72 may be greater than the thickness of the overhang 722 for similar purposes.

The material of the sheet 72 is the same as that of the casing body 71, and the material properties are the same, so that the sheet 72 and the casing body 71 are firmly jointed, especially in the case that the sheet 72 is connected to the casing body 71 by welding or 3D printing. In the present embodiment, the casing body 71 and the sheet 72 may be made of titanium alloy or alloy steel.

In some embodiments, the sheet 72 may also be a shape memory alloy (e.g., a titanium-nickel shape memory alloy) which has high plasticity and can absorb more energy when being impacted, so as to reduce the impact of the impact energy on the casing body 71.

The sheet body 72 may be provided with anti-friction recesses (not shown), the aperture of the anti-friction recesses of the sheet body 72 being 10-100 times larger than the aperture of the anti-friction recesses. The anti-friction concave holes can be holes which are recessed towards the inner side far away from the casing body 71 on the sheet body 72, and the anti-friction concave holes can reduce the surface friction force of the sheet body 72, so that when the flying-off blades are contacted with the sheet body 72, the blades can slide relative to the sheet body 72 more easily, the impact load transmitted to the casing body 71 by the blades is restrained, and the possibility of deformation of the casing body 71 is reduced. The anti-friction concave holes are actually of a fish scale mode structure, the concave holes are formed in the surfaces of the fish scales, the concave holes can reduce the surface friction force of the fish scales, the trunk of a fish is smooth, the anti-drag effect can be achieved finally, the fish can swim more quickly, and the fish can prey or escape from natural enemies to pursue and catch.

The extending direction of the hanging end 722 is forward to the rotating direction of the fan. The direction of extension of the overhanging end 722 is substantially the same as the tangential direction of the fan rotation direction, and even if the fan blade 1 scrapes and rubs against the sheet 72 without flying off due to the bumping vibration, the fan will not easily knock the sheet 72 off, thereby reducing or even avoiding the possibility of undesired falling off of the sheet 72.

In other words, if the extending direction of the hanging end 722 is opposite to the rotating direction of the fan, that is, the extending direction of the hanging end 722 is substantially opposite to the tangential direction of the rotating direction of the fan, once the fan is scratched against the sheet 72, the sheet 72 is easily knocked off, so that the sheet 72 fails in advance, and even the fan is damaged.

The sheet body 72 is one or more of a semicircular sheet, a trapezoidal sheet, a triangular sheet, a rectangular sheet and a fish scale-shaped sheet. Different shapes of the sheet 72 may be selected depending on practical requirements and limitations (e.g., processing difficulties and strength and stiffness requirements). The shapes of the individual sheets 72 in the same casing device 7 may be the same, or a combination of sheets 72 of different shapes may be provided. In the present embodiment, as shown in fig. 3, the sheet body 72 is a fish scale sheet.

By applying the casing device 7, when the fan blade 1 flies off, the flying blade contacts with the sheet body 72 first, the sheet body 72 bends to absorb the impact load, and the bending of one sheet body 72 can drive other sheet bodies 72 to bend, so that the impact load is dispersed to a wider range, and the structural integrity of the casing body 71 is ensured.

Example 2

The structure of the case device 7 and the aircraft engine including the same in this embodiment is substantially the same as that in embodiment 1, except that the sheet body 72 in this embodiment is a trapezoidal sheet, as shown in fig. 4.

Example 3

The structure of the casing device 7 and the aircraft engine including the same in this embodiment is substantially the same as that in embodiment 1, except that the sheet body 72 in this embodiment is a triangular sheet, as shown in fig. 5.

While specific embodiments of the invention have been described above, it will be understood by those skilled in the art that this is by way of example only, and that 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 spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims (13)

1. The cartridge receiver device is characterized by comprising a cartridge receiver body, wherein a plurality of sheet bodies are mounted on the inner wall of the cartridge receiver body, each sheet body is provided with a root and a suspension end, the roots are connected to the cartridge receiver body, and the suspension ends and at least one adjacent sheet body are radially overlapped on the cartridge receiver body and have radial gaps.

2. The case apparatus according to claim 1, wherein the case apparatus comprises a plurality of sheet rows including a plurality of the sheets arranged in a same row.

3. A casing device according to claim 2, wherein said overhanging end of said blade extends toward an adjacent row of said blades.

4. A case device according to claim 3, wherein the blades in the blade row are arranged along an axial direction of the case body, and the suspended end portions of the blades in the same blade row extend toward the same side.

5. The case apparatus of claim 3, wherein a single lobe overlaps at least two of said lobes in adjacent ones of said lobe rows.

6. The receiver apparatus according to claim 1, wherein the overhanging portion extends in a direction that is forward of a direction of rotation of the fan.

7. The case device according to claim 1, further comprising a blade layer set including a plurality of said blades, wherein an overlap region exists between adjacent ones of said blade layers.

8. The receiver apparatus of claim 1, wherein the blade narrows from the root toward the flying end.

9. The case apparatus of claim 1, wherein the sheet is the same material as the case body.

10. The receiver device of claim 1, wherein the sheet is a shape memory alloy.

11. The receiver apparatus according to claim 1, wherein said sheet member is provided with recesses for reducing friction, and a dimension of said sheet member in an extending direction thereof is 10 to 100 times a diameter of said recesses for reducing friction.

12. The receiver apparatus as in claim 1, wherein the sheet is one or more of a semi-circular sheet, a trapezoidal sheet, a triangular sheet, a rectangular sheet, a fish scale sheet.

13. An aircraft engine, characterized in that it comprises a casing device according to any one of claims 1 to 12.

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