Thrust reverser and aircraft engine nacelle

Abstract

The present invention discloses a reverse thrust device and an aircraft engine nacelle. The reverse thrust device includes a reverse thrust fixed frame, a reverse thrust movable outer cover, a slide groove and a slide rail. The reverse thrust movable outer cover is configured to be axially movable relative to the reverse thrust fixed frame. The slide groove is provided on the reverse thrust fixed frame and includes a slide groove body and a ball group provided on the slide groove body. The ball group includes a plurality of balls provided at intervals along the axial direction of the slide groove body. The slide rail is provided on the reverse thrust movable outer cover and is configured to move within the slide groove body and to contact and cooperate with the balls during the movement. The slide groove of the reverse thrust device of the present invention includes a slide groove body and a ball group provided on the slide groove body. When the slide rail moves, it cooperates with the balls, so that the friction between the slide rail and the slide groove is rolling friction, which greatly reduces the friction resistance between the slide rail and the slide groove and reduces the risk of component damage.

Description

Technical Field

[0001] The invention relates to a reverse thrust device and an aero-engine nacelle. Background Art

[0002] The thrust reverser is an important component of the aircraft engine nacelle. Its main function is to obtain reverse thrust by changing the direction of the engine exhaust flow, so as to decelerate the aircraft efficiently and reliably and significantly shorten the landing distance of the aircraft. It is particularly effective on wet and icy runways, reducing the aircraft's requirements for airports and improving the efficiency of airport use. It can also be used for aircraft aborted takeoffs and improve the safety of aircraft operations. Summary of the Invention

[0003] The present invention provides a thrust reverser and an aero-engine nacelle, which reduce the friction resistance between a slide rail and a slide groove and reduce the risk of component damage.

[0004] A first aspect of the present invention provides a thrust reverser device, comprising:

[0005] Thrust-back fixed frame;

[0006] a thrust reverser movable outer cover configured to be movably arranged in the axial direction relative to the thrust reverser fixed frame;

[0007] A chute is provided on the reverse thrust fixed frame and includes a chute body and a ball group provided on the chute body, wherein the ball group includes a plurality of balls spaced apart along the axial direction of the chute body; and

[0008] The slide rail is arranged on the reverse thrust movable outer cover and is configured to move in the slide groove body and to contact and cooperate with the ball during the movement.

[0009] In some embodiments, the slide groove includes at least two ball groups spaced apart in the circumferential direction.

[0010] In some embodiments, the slide body includes an outer sleeve and an inner sleeve, the inner sleeve has a plurality of embedding grooves corresponding to the plurality of balls of the ball group, the balls are embedded in the embedding grooves and extend to the inner surface of the inner sleeve to contact the slide rail.

[0011] In some embodiments, the ball includes a ball body and connecting columns respectively arranged at both ends of the ball body, the embedded groove includes a spherical groove and columnar grooves respectively located at both ends of the spherical groove, the connecting column can be rotatably installed in the columnar groove, and the ball body is installed in the spherical groove.

[0012] In some embodiments, the outer bushing includes at least two outer bushing blocks distributed in a circumferential direction, and the at least two outer bushing blocks are sequentially arranged to form the outer bushing.

[0013] In some embodiments, the slide groove body further includes a positioning connector, which is used to connect the inner sleeve and the outer sleeve.

[0014] In some embodiments, the reverse thrust fixing frame includes a hinge beam, a torque box and a locking beam, the hinge beam and the locking beam are connected through the torque box, and sliding grooves are provided on the hinge beam and the locking beam.

[0015] A second aspect of the present invention provides an aircraft engine nacelle, comprising the thrust reverser device of the first aspect of the present invention.

[0016] Based on the technical solution provided by the present invention, the reverse thrust device includes a reverse thrust fixed frame, a reverse thrust movable outer cover, a slide groove and a slide rail. The reverse thrust movable outer cover is configured to be axially movable relative to the reverse thrust fixed frame. The slide groove is provided on the reverse thrust fixed frame and includes a slide groove body and a ball group provided on the slide groove body. The ball group includes a plurality of balls spaced axially along the slide groove body. The slide rail is provided on the reverse thrust movable outer cover and is configured to move within the slide groove body and to contact and cooperate with the balls during movement. The slide groove of the reverse thrust device of the present invention includes a slide groove body and a ball group provided on the slide groove body. When the slide rail moves, it cooperates with the balls, so that the friction between the slide rail and the slide groove is rolling friction, which greatly reduces the friction resistance between the slide rail and the slide groove and reduces the risk of component damage.

[0017] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 This is a structural diagram of an aircraft engine nacelle.

[0020] Figure 2 It is a structural diagram of the reverse deduction structure in the related art.

[0021] Figure 3 It is a structural diagram of the reverse thrust fixed frame in the related art.

[0022] Figure 4 It is a structural diagram of the slide rail and the slide groove in the related art.

[0023] Figure 5 for Figure 4 Schematic diagram of the structure of the middle slide rail.

[0024] Figure 6 for Figure 4Schematic diagram of the structure of the middle chute.

[0025] Figure 7 Schematic diagram of the structure of the chute according to an embodiment of the present invention.

[0026] Figure 8 for Figure 7 Schematic diagram of the exploded structure of the chute shown.

[0027] Figure 9 for Figure 7 Schematic diagram of the structure of the inner sleeve.

[0028] Figure 10 for Figure 9 The inner sleeve is shown in the C-direction view.

[0029] Figure 11 for Figure 10 AA section of the inner sleeve is shown.

[0030] Figure 12 for Figure 10 BB section of the inner sleeve shown.

[0031] Figure 13 Schematic diagram of the structure of the ball according to an embodiment of the present invention.

[0032] Figure 14 Schematic diagram of the assembly of the bushing according to an embodiment of the present invention.

[0033] Figure 15 Schematic diagram of the assembly of the bushing and the hinge beam according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorized specification. In all examples shown and discussed herein, any specific values should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0036] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be subsequently positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used herein are interpreted accordingly.

[0037] refer to Figure 1 As shown, the aircraft engine nacelle according to the embodiment of the present invention includes an air inlet 10 , an engine casing 20 , a thrust reverser 30 and a nozzle 40 .

[0038] In the related art, reference Figure 2 and Figure 3 The reverse thrust device 30 includes a hinge beam 31, a locking beam 33, a reverse thrust moving cover 34 and an actuator 35. The reverse thrust moving cover 34 moves along the hinge beam 31 and the locking beam 33 under the action of the actuator 35. Figure 4 , a slide groove 36 is provided on the hinge beam 31 and the lock beam 33. A slide rail 37 is provided on the reverse push moving cover 34. In order to reduce the friction resistance during the movement, refer to Figure 5 and Figure 6 A lubricating layer 38 is usually bonded or coated on the slide rail 37 and the slide groove 36.

[0039] Because the reverse thrust housing 34 moves at high speeds, often accompanied by vibrations and impacts, the lubricating layer 38 on the slide rail 37 or the slide groove 36 of the thrust reverser 30 can become damaged. Damaged lubricating layer 38 increases the friction coefficient of the slide rail 37 or the slide groove 36, further increasing the resistance to the operation of the thrust reverser 30 and the risk of component damage. Therefore, regular inspection and replacement of the lubricating layer 38 are necessary. Furthermore, the lubricating layer 38 requires complex repair procedures, requiring a combination of mechanical and chemical treatments. This results in long repair cycles and high costs.

[0040] In view of this, in order to reduce the frictional resistance between the slide rail and the slide groove and reduce the risk of component damage, an embodiment of the present invention proposes a reverse thrust device.

[0041] refer to Figures 7 to 15 The reverse thrust device of the embodiment of the present invention includes a reverse thrust fixed frame, a reverse thrust movable outer cover, a slide 70 and a slide rail. The reverse thrust movable outer cover is configured to be movably arranged in the axial direction relative to the reverse thrust fixed frame. The slide 70 is provided on the reverse thrust fixed frame. The slide 70 includes a slide body and a ball group provided on the slide body, and the ball group includes a plurality of balls 71 arranged at intervals along the axial direction of the slide body. The slide rail is provided on the reverse thrust movable outer cover and is configured to move within the slide body and to contact and cooperate with the balls during the movement.

[0042] and Figures 2 to 6 Compared to the structure of the reverse thrust device in the related art shown, the reverse thrust device of the embodiment of the present invention differs in that the structure of the chute is improved. The chute 70 of the reverse thrust device of the embodiment of the present invention includes a chute body and a ball group arranged on the chute body. When the slide rail moves, it cooperates with the ball 71. This makes the friction between the slide rail and the chute rolling friction, greatly reducing the friction resistance between the slide rail and the chute and reducing the risk of component damage. Moreover, the chute 70 of the embodiment of the present invention is an independent structural component. During maintenance and replacement, only mechanical disassembly and assembly are required, without the need to use complex mechanical and chemical methods to replace the lubricating layer, making the assembly and maintenance process convenient.

[0043] The structures of the reverse thrust fixed frame, reverse thrust movable cover and slide rail of the reverse thrust device according to the embodiment of the present invention can be referred to Figures 2 to 4 The relevant structures in the embodiment will not be described in detail here.

[0044] In some embodiments, reference Figure 8 The chute 70 includes at least two ball groups spaced apart in the circumferential direction. When the slide rail cooperates with the chute 70, the balls 71 of at least two ball groups cooperate with the slide rail simultaneously in the circumferential direction, thereby making the movement of the slide rail more stable.

[0045] Specifically in Figure 8 In the illustrated embodiment, the slideway 70 includes three ball groups evenly arranged in the circumferential direction.

[0046] In some embodiments, reference Figure 8 , the chute body includes an outer bushing and an inner bushing 72. Figure 14 The slide body further includes a positioning connector 76, which is used to connect the inner sleeve 72 and the outer sleeve.

[0047] Among them, the inner bushing 72 is a cylindrical shell with an opening in the circumferential direction. The outer bushing includes at least two outer bushing blocks distributed in the circumferential direction. At least two outer bushing blocks are arranged in sequence to form an outer bushing. Specifically, the at least two outer bushing blocks include a first outer bushing block 73, a second outer bushing block 75 and a third outer bushing block 74. Each outer bushing block is provided with an outer positioning hole connected to the inner bushing 72. Taking the first outer bushing block 73 as an example, the first outer bushing block 73 is provided with two outer positioning holes 731, and the inner bushing 72 is provided with two inner positioning holes 722 corresponding to the two outer positioning holes 731 provided on the first outer bushing block 73. Figure 14 The inner bushing 72 and the first outer bushing block 73 are connected by a positioning connector 76 that passes through the outer positioning hole 731 and the inner positioning hole 722 .

[0048] Specifically, in some embodiments, the inner bushing 72, the first outer bushing block 73, the second outer bushing block 75 and the third outer bushing block 74 are machined. The bushings may be made of stainless steel.

[0049] refer to Figures 9 to 12 The inner bushing 72 has a plurality of embedding grooves 721 corresponding to the plurality of balls 71 of the ball assembly. The balls 71 are embedded in the embedding grooves 721 and extend to the inner surface of the inner bushing 72 to contact the slide rail.

[0050] Specifically, if Figure 9 and Figure 10 As shown, the inner sleeve 72 is provided with three embedded groove groups distributed in the circumferential direction, each embedded groove group corresponds to a ball group. Each embedded groove group includes a plurality of embedded grooves 721 evenly distributed in the axial direction, and the balls 71 are embedded in the embedded grooves 721.

[0051] In some embodiments, reference Figure 13 The ball 71 includes a ball body 711 and connecting posts 712 respectively provided at both ends of the ball body 711. The ball body 711 is spherical and the connecting posts 712 are columnar. Figure 11The embedding groove 721 includes a spherical groove 7211 and columnar grooves 7212 located at both ends of the spherical groove 7211. The connecting column 712 is installed in the columnar groove 7212, and the ball body 711 is installed in the spherical groove 7211. The connecting column 712 is rotatably installed in the columnar groove 7212, so that the ball body 722 can rotate during the process of cooperating with the slide rail. Similarly, a corresponding embedding groove is also provided on the outer bushing. The embedding groove provided on the outer bushing is used to accommodate the portion of the ball body 711 protruding from the spherical groove 7211.

[0052] In some embodiments, the reverse thrust fixing frame includes a hinge beam 31, a torque box 32 and a lock beam 33. The hinge beam 31 and the lock beam 33 are connected by the torque box 32. The hinge beam 31 and the lock beam 33 are both provided with a slide groove 70. Figure 15 The hinge beam 31 is provided with a slide groove 70. Specifically, the slide groove 70 is locked in place by a fastener 80. The fastener 80 is installed at both ends of the hinge beam 31 and the locking beam 33. The end of the slide rail 37 is inserted into the slide groove 70 and engages with the ball bearing 71 of the slide groove 70.

[0053] The slideway 70 of this embodiment of the present invention is an integral insert. The specific assembly process is as follows: Steel balls 71 are sequentially placed in the insert grooves 721 of the inner bushing, followed by the corresponding outer bushing blocks. After the three outer bushing blocks are installed, multiple locating connectors 76 are sequentially inserted into the outer locating holes 731 and inner locating holes 722 to form the integrally inserted slideway 70.

[0054] The assembled chute 70 is installed in the hinge beam 31 and the lock beam 33 and is locked by the fastener 80. The fastener 80 is installed at both ends of the hinge beam 31 and the lock beam 33.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solutions of the present invention. They should all be included in the scope of the technical solutions claimed for protection by the present invention.

Claims

1. A thrust reverser, characterized in that: include: Thrust-back fixed frame; a reverse thrust movable outer cover, configured to be movably arranged in the axial direction relative to the reverse thrust fixed frame; A chute is provided on the reverse thrust fixed frame and includes a chute body and a ball group provided on the chute body, wherein the ball group includes a plurality of balls spaced apart along the axial direction of the chute body; and a slide rail, provided on the reverse thrust movable housing, and configured to move within the slide groove body and to contact and cooperate with the ball during movement; The slide groove body includes an outer sleeve and an inner sleeve, the inner sleeve has a plurality of embedding grooves corresponding to the plurality of balls of the ball group, the balls are embedded in the embedding grooves and extend to the inner surface of the inner sleeve to contact the slide rail, the balls include a ball body and connecting columns respectively arranged at both ends of the ball body, the embedding groove includes a spherical groove and columnar grooves respectively located at both ends of the spherical groove, the connecting column is rotatably installed in the columnar groove, and the ball body is installed in the spherical groove.

2. The thrust reverser according to claim 1, characterized in that: The slide groove includes at least two ball groups spaced apart in the circumferential direction.

3. The thrust reverser according to claim 1, characterized in that: The outer bushing includes at least two outer bushing blocks distributed in a circumferential direction, and the at least two outer bushing blocks are arranged in sequence to form the outer bushing.

4. The thrust reverser according to claim 1, characterized in that: The slide groove body further includes a positioning connector, which is used to connect the inner sleeve and the outer sleeve.

5. The thrust reverser according to claim 1, characterized in that: The reverse thrust fixing frame includes a hinge beam, a torque box and a lock beam. The hinge beam and the lock beam are connected through the torque box. The sliding groove is provided on both the hinge beam and the lock beam.

6. An aircraft engine nacelle, characterized in that: The method comprises the thrust reverser according to any one of claims 1 to 5.

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