CN113492988B

CN113492988B - Reverse thrust device and aeroengine

Info

Publication number: CN113492988B
Application number: CN202010255198.3A
Authority: CN
Inventors: 何宝明; 杜尚飞; 陈焕
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2023-06-20
Anticipated expiration: 2040-04-02
Also published as: CN113492988A

Abstract

The present disclosure relates to a thrust reverser and an aeroengine. Wherein, the thrust reverser includes: a frame member; a moving housing located outside the frame member; and a roller chute connection mechanism for movably mounting the mobile housing on the frame member. By adopting the roller chute connecting mechanism to replace the sliding structure of the sliding rail and the sliding rail bushing in linear contact, the thrust friction resistance of the movable outer cover in the thrust state can be effectively reduced, the sliding efficiency is improved, the clamping stagnation probability is reduced, and the thrust working reliability is improved.

Description

Reverse thrust device and aeroengine

Technical Field

The disclosure relates to the technical field of aeroengines, and in particular relates to a reverse thrust device and an aeroengine.

Background

The reverse thrust device is an important component of the nacelle of the large-scale transport plane and the large-scale passenger plane, and has the main functions of obtaining reverse thrust by changing the exhaust flow direction of the engine, so that the aircraft is efficiently and reliably decelerated, the landing running distance of the aircraft is obviously shortened, the effect on a wet and frozen runway is particularly remarkable, the requirements of the aircraft on the airport are reduced, the use efficiency of the airport is improved, and meanwhile, the reverse thrust device can also be applied to the interrupted take-off of the aircraft, and the working safety of the aircraft is improved.

The thrust device widely used on the large bypass ratio turbofan aeroengine at present is a C-shaped blade grid type thrust device, as shown in fig. 1 and 2, the C-shaped blade grid type thrust device consists of C-

shaped culverts

1a and 1b with the same left and right half functions and similar structures, as shown in fig. 2, the C-shaped culvert 1a consists of two large components of a frame component 2 and a movable housing 3, and the movable housing 3 is slidably arranged on the periphery of the frame component 2, wherein the frame component 2 comprises an upper slide rail beam 2a, a lower slide rail beam 2b, a torque box 2C, a core cabin cover 2d, a blade grid 2e and other structures, and the movable housing 3 comprises an upper slide rail 3a, a lower slide rail 3b, an outer wall plate 3C, an outer culvert outer wall 3d, a choke door 3e, a pull rod 3f and other structures.

As shown in fig. 10 and 11, the upper slide rail 3a and the outer wall 3d of the movable housing are connected together by adopting a structure such as a high locking bolt, the upper slide rail 3a is provided with a slidable slide rail 3a-1, the slide rail 3a-1 is of a linear structure, the length is long, the upper slide rail beam 2a is provided with a linear slide rail bushing 2a-1 matched with the slide rail 3a-1 about one meter, and the matching mode of the lower slide rail 3b and the slide rail bushing 2b-1 on the lower slide rail beam 2b is the same as the matching mode of the upper slide rail 3a and the slide rail bushing 2a-1 on the upper slide rail beam 2 a. When the reverse thrust device is unfolded, the reverse thrust actuating system drives the movable outer cover 3 to move backwards, the upper sliding rail 3a and the lower sliding rail 3b of the movable outer cover 3 translate backwards in the sliding rail bushing 2a-1 of the upper sliding rail beam 2a and the sliding rail bushing 2b-1 of the lower sliding rail beam 2b together, the front end support of the outer culvert outer wall 3d drives the front end support of the choke door 3e to translate, meanwhile, the choke door 3e deflects under the action of the pull rod 3f and finally blocks reverse thrust outer culvert airflow, and the outer culvert airflow is deflected by the choke door 3e and then discharged to the inclined front through the blade grating 2e, so that reverse thrust is generated.

Because the length of the sliding rail and the sliding rail bushing is longer, the sliding rail and the sliding rail bushing are in a linear contact sliding mode. When the reverse thrust actuating system pushes the movable outer cover to move backwards, the movable outer cover is easy to generate sliding rail clamping fault when the sliding rail slides in the sliding rail bushing under the lateral force of the actuating system and the deformation condition of the movable outer cover, so that effective reverse thrust cannot be generated, the reliability of the reverse thrust is reduced, and the safety of an airplane and a crew member can be threatened when serious.

Disclosure of Invention

According to research, the problem of low thrust reversibility of the mobile housing exists in the related technology.

In view of the above, the embodiments of the present disclosure provide a thrust reverser and an aeroengine, which can ensure that a mobile housing moves stably in a thrust reverser state, and improve thrust reverser reliability.

Some embodiments of the present disclosure provide a thrust reverser device comprising:

a frame member;

a moving housing located outside the frame member; and

and the roller chute connecting mechanism is used for movably mounting the movable housing on the frame component.

In some embodiments, the frame member includes a chute beam having a chute, the mobile housing includes a roller mounting beam, the roller chute connection mechanism includes a chute and a roller mounted on the roller mounting beam, the roller disposed within the chute.

In some embodiments, the chute is an embedded chute and is formed in the chute beam, with the rollers embedded in the chute.

In some embodiments, the roller chute connection mechanism includes two chutes and two sets of rollers disposed in an intersecting manner in an axial direction, the two sets of rollers being disposed one-to-one within the two chutes.

In some embodiments, the roller chute connection mechanism includes two sets of rollers disposed vertically in an axial direction.

In some embodiments, each set of rollers includes a plurality of rollers spaced apart along the sliding direction of the roller mounting beam.

In some embodiments, a plurality of rollers are disposed at both ends of the roller mounting beam in a sliding direction.

In some embodiments, the roller includes a roller rotatable about a spindle mounted on a roller mounting beam, a spindle mounted on the spindle and a shim mounted on the spindle between the roller and the roller mounting beam with a predetermined gap between the shim and an end face of the roller.

In some embodiments, the end of the chute is provided with a flaring.

Some embodiments of the present disclosure provide an aircraft engine comprising the aforementioned thrust reverser.

Therefore, according to the embodiment of the disclosure, by adopting the roller chute connecting mechanism to replace the sliding structure in which the sliding rail is in linear contact with the sliding rail bushing, the thrust friction resistance of the movable outer cover in the thrust state can be effectively reduced, the sliding efficiency is improved, the jamming probability is reduced, and the thrust working reliability is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

The disclosure may be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of the overall structure of a conventional C-shaped cascade thrust reverser;

FIG. 2 is a schematic view of the structure of a C-shaped culvert in a conventional C-shaped cascade thrust device;

FIG. 3 is a schematic view of the structure of a frame member of a prior art C-cascade thrust reverser;

FIGS. 4 and 5 are cross-sectional views at positions A-A and B-B, respectively, of FIG. 3;

FIG. 6 is a schematic view of the structure of a moving housing in a conventional C-shaped cascade thrust reverser;

FIGS. 7 and 8 are cross-sectional views at positions C-C and D-D, respectively, of FIG. 6;

FIG. 9 is a meridian plane cross-sectional view of a conventional C-shaped cascade thrust reverser;

FIG. 10 is a schematic view of an assembly of an upper rail and an upper rail beam in a conventional C-shaped cascade thrust reverser;

FIG. 11 is a cross-sectional view taken at location F-F in FIG. 10;

FIG. 12 is a schematic structural view of a tongue beam and roller mounting beam mounting engagement in some embodiments of the thrust reverser of the present disclosure;

FIGS. 13 and 14 are partial enlarged schematic views of FIG. 12 at the positions of circle E and circle F, respectively;

FIG. 15 is a cross-sectional view at the G-G position of FIG. 12;

FIG. 16 is an enlarged partial schematic view of the position of circle G in FIG. 15;

FIG. 17 is a schematic view of the configuration of the tongue beam and roller mounting beam at the end mounting engagement in some embodiments of the thrust reverser of the present disclosure;

fig. 18 is an enlarged partial schematic view at the position of circle H in fig. 17.

Description of the reference numerals

1a,1b, C-type culvert; 2. a frame member; 2a, an upper slide rail beam; 2b, sliding down the rail beam; 2c, torque box; 2d, a core cabin cover; 2e, leaf grating; 2a-1,2b-1, a slide rail bushing; 3. moving the housing; 3a, an upper slide rail; 3b, a lower slide rail; 3c, an outer wall plate; 3d, outer wall of the culvert; 3e choke door; 3f, a pull rod; 3a-1, a sliding rail; 4. a runner beam; 5. a roller mounting beam; 6. a chute; 7. a roller; 7-1, a roller; 7-2, a mandrel; 7-3, a gasket; 7-4, nuts; 8. and (5) a flaring structure.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative, and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only and not limiting unless otherwise specifically stated.

The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and not exclude the possibility of also encompassing other elements. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

In this disclosure, when a particular device is described as being located between a first device and a second device, there may or may not be an intervening device between the particular device and either the first device or the second device. When it is described that a particular device is connected to other devices, the particular device may be directly connected to other devices without intervening devices, or may be directly connected to other devices without intervening devices.

All terms used in the present disclosure have the same meaning as understood by one of ordinary skill in the art to which the present disclosure pertains, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification.

Some embodiments of the present disclosure provide a thrust reverser device comprising: the movable housing is positioned on the outer side of the frame component, and the roller chute connecting mechanism is used for movably mounting the movable housing on the frame component.

The frame member is the main body fixed structure of the thrust reverser, and in some embodiments, comprises a torque box, a core nacelle cover, a blade grid and other structures, the movable housing comprises an outer wall plate, an outer culvert outer wall, a choke door, a pull rod and other structures, and when the thrust reverser is unfolded, the thrust reverser system drives the movable housing to move backwards. By adopting the roller chute connecting mechanism to replace the sliding structure of the sliding rail and the sliding rail bushing in linear contact, the thrust friction resistance of the movable outer cover in the thrust state can be effectively reduced, the sliding efficiency is improved, the clamping stagnation probability is reduced, and the thrust working reliability is improved. In addition, the relative indexes such as thrust requirement and weight of the anti-thrust system can be reduced.

As shown in fig. 12 to 16, in some embodiments, the frame member includes a chute beam 4 provided with a chute 6, the mobile housing includes an outer wall 3d and a roller mounting beam 5, the outer wall 3d is fixedly connected with the roller mounting beam 5, the roller chute connection mechanism includes the chute 6 and a roller 7 mounted on the roller mounting beam 5, and the roller 7 is disposed in the chute 6. The sliding chute beam 4 and the roller mounting beam 5 form stable and reliable sliding connection through the roller chute connecting mechanism, so that the movable outer cover is ensured to stably move in a thrust-back state.

In some alternative embodiments, the frame member includes a roller mounting beam, the mobile housing includes a chute beam with a chute, the roller chute connection mechanism includes a chute and a roller mounted on the roller mounting beam, the roller is disposed within the chute, and the smooth movement of the mobile housing in the thrust-back condition can be ensured as well.

To ensure that the rollers slide reliably within the runner, in some embodiments the runner 6 is an embedded runner and is formed within the runner beam 4, with the rollers 7 embedded within the runner 6.

In some embodiments, as shown in fig. 16, the roller 7 includes a roller 7-1, a mandrel 7-2, a washer 7-3, and a nut 7-4, the roller 7-1 is rotatable about the mandrel 7-2, the mandrel 7-2 is fixedly mounted by the nut 7-4 after passing through a hole in the roller mounting beam 5, the washer 7-3 is mounted on the mandrel 7-2 and is located between the roller 7-1 and the roller mounting beam 5, and a predetermined gap is provided between the washer 7-3 and an end surface of the roller 7-1 to ensure that the roller 7-1 does not rub against the roller mounting beam 5 when rotating about the mandrel 7-2.

As shown in fig. 15 and 16, in some embodiments, the roller chute connection mechanism includes two chutes 6 and two sets of rollers 7 disposed to intersect in the axial direction, the two sets of rollers 7 being disposed one-to-one in the two chutes 6, so that it is ensured that the roller mounting beam 5 does not come off the chute beam 4 when the rollers 7 move in the chutes 6. As shown in fig. 15 and 16, in some embodiments, the roller chute connection mechanism includes two sets of rollers 7 disposed vertically in the axial direction, and as shown in fig. 16, the set of rollers 7 mounted in the axial direction X ensures movement of the roller mounting beam 5 relative to the chute beam 4 while restricting movement of the roller mounting beam 5 in the Y direction; the other group of rollers 7 which are axially arranged in the Y direction ensures that the roller mounting beam 5 moves relative to the chute beam 4 and simultaneously limits the movement of the roller mounting beam 5 in the X direction; the two groups of rollers 7 limit the movement of the roller mounting beam 5 in the X, Y direction simultaneously while ensuring the movement of the roller mounting beam 5 relative to the runner beam 4, so that the movement stability of the movable outer cover in the thrust-back state is improved.

To promote contact stability of the rollers with the runner, in some embodiments, as shown in connection with fig. 12 to 18, each set of rollers 7 includes a plurality of rollers 7 spaced apart along the sliding direction of the roller mounting beam 5. When the plurality of rollers 7 are arranged, the part of rollers 7 can slide out of the sliding groove 6, the other part of rollers are still arranged in the sliding groove 6, the movable outer cover can slide stably at all positions, and the enough rollers support the load born by the movable outer cover. The number of the rollers is determined according to the thrust back function, reliability, stress and other factors.

In some embodiments, as shown in connection with fig. 12 to 18, a plurality of rollers 7 are provided at both ends in the sliding direction of the roller mounting beam 5. Only need set up a plurality of gyro wheels 7 at the ascending both ends of gyro wheel installation roof beam 5 slip direction just can guarantee to remove the dustcoat and can steadily slide in each position, and when the single-point failure takes place for some gyro wheels, other gyro wheels still can normally work. The structure design is simplified while the moving stability is ensured, and the practicability is higher.

To ensure that the roller 7 fits smoothly into the runner 6 in the runner beam 4, in some embodiments, the end of the runner 6 is provided with a flared structure 8, as shown in fig. 17 and 18. The tail end of the chute 6 is subjected to flaring design, and when the roller 7 slides out of the chute 6 and then slides in, the flaring structure 8 can ensure that the roller 7 can smoothly enter the chute 6 without damaging the edge of the chute 6, so that the working life of the roller 7 and the chute 6 is prolonged, and the motion stability of a movable outer cover is improved.

Some embodiments of the present disclosure provide an aircraft engine comprising the aforementioned thrust reverser. By adopting the reverse thrust device in the embodiment of the disclosure, the aeroengine can reduce the probability of occurrence of the blockage fault of the movable housing during the reverse thrust operation, improve the service life of the reverse thrust component, improve the reliability of the reverse thrust operation and reduce the risk of reverse thrust safety.

Thus, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concepts of the present disclosure, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that the foregoing embodiments may be modified and equivalents substituted for elements thereof without departing from the scope and spirit of the disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A thrust reverser, comprising:

a frame member;

a moving housing located outside the frame member; and

a roller chute connection mechanism for movably mounting the mobile housing on the frame member;

wherein, frame part is including spout roof beam (4) that are equipped with spout (6), remove the dustcoat and include gyro wheel installation roof beam (5), gyro wheel spout coupling mechanism includes spout (6) and install gyro wheel (7) on gyro wheel installation roof beam (5), gyro wheel (7) set up in spout (6), gyro wheel spout coupling mechanism includes two spout (6) and be two sets of gyro wheels (7) that intersect in the axial setting, two sets of gyro wheels (7) one-to-one set up in two spout (6).

2. The thrust reverser according to claim 1, wherein the runner (6) is an embedded runner and is formed in the runner beam (4), the rollers (7) being embedded in the runner (6).

3. The thrust reverser according to claim 1, wherein the roller chute connection comprises two sets of rollers (7) arranged vertically in the axial direction.

4. The thrust reverser device according to claim 1, wherein each set of rollers (7) comprises a plurality of rollers (7) arranged at intervals along the sliding direction of the roller mounting beam (5).

5. The thrust reverser according to claim 4, wherein the plurality of rollers (7) are provided at both ends in the sliding direction of the roller mounting beam (5).

6. The thrust reverser device according to claim 1, wherein the roller (7) comprises a roller (7-1), a spindle (7-2) and a shim (7-3), the roller (7-1) being rotatable about the spindle (7-2), the spindle (7-2) being mounted on the roller mounting beam (5), the shim (7-3) being mounted on the spindle (7-2) and being located between the roller (7-1) and the roller mounting beam (5), the shim (7-3) and the end face of the roller (7-1) having a preset gap therebetween.

7. The thrust reverser according to claim 1, characterized in that the end of the chute (6) is provided with a flaring (8).

8. An aero-engine comprising a thrust reverser according to any one of claims 1 to 7.