A locking beam for reverse thrust device

Abstract

The present application belongs to the technical field of engine design, and specifically relates to a locking beam of a reverse thrust device. The device comprises a left half locking beam body (1) and a right half locking beam body (2), wherein the bottom end of the inner side surface of the left half locking beam body (1) has a plurality of centering positioning pins (5) protruding from the inner side surface, and the bottom end of the left half locking beam body (1) is provided with a long bolt (10) penetrating along the axial direction of the reverse thrust device, and the long bolt (10) is exposed at a plurality of notches at the bottom end of the left half locking beam body (1) to form a mounting point; the bottom end of the inner side surface of the right half locking beam body (2) has a plurality of positioning pin holes (6) adapted to accommodate the centering positioning pins (5), and the bottom end of the inner side surface of the right half locking beam body (2) is fixed with a plurality of closed locking buckles (11), and the closed locking buckles (11) have hooks for mounting at the mounting points of the long bolts (10). The present application reduces the difficulty of fastening the left and right semi-locking beam bodies by guiding and assisting the centering locating pin and the locating pin hole.

Description

Technical Field

[0001] The present application belongs to the technical field of engine design, and specifically relates to a locking beam of a reverse thrust device. Background Art

[0002] The cascade thrust reverser is an important component of the power of large transport aircraft and large passenger aircraft. Its main function is to obtain reverse thrust by changing the direction of engine exhaust flow, so as to decelerate the aircraft efficiently and reliably. It can significantly shorten the landing runway of the aircraft, and its effect is particularly prominent on wet and icy runways. It can not only reduce the aircraft's requirements for the airport and improve the efficiency of airport use, but can also be used for aircraft aborted takeoffs and improve the safety of aircraft operations.

[0003] The guide rail beam installed under the cascade thrust reverser is the main structure of the thrust reverser bearing frame, which plays the role of load transmission and anti-deformation, and is widely used in various types of cascade thrust reversers of large bypass ratio engines. Figure 1 As shown, the thrust reverser bearing frame includes a left half unit body 100 and a right half unit body 200, and the left half unit body 100 and the right half unit body 200 are connected to a locking beam 300 below. Figure 2 As shown, it mainly includes a left half locking beam 301 and a right half locking beam 302, and the left half locking beam 301 and the right half locking beam 302 are locked together by locking.

[0004] The locking beam 300 is designed to transfer loads and participate in forming the main load-bearing frame of the reverse thrust device. At the same time, it locks the left and right half units of the reverse thrust device. The locking beam of the traditional cascade type reverse thrust device is cast by aluminum alloy, with large size and complex structure. The main disadvantages of this structural form are as follows:

[0005] a) Due to the large-size thin-walled structure used in the reverse thrust device, once the deformation of the left and right half units is inconsistent after installation, it will be difficult to achieve the left and right half alignment on the end face of the traditional locking rail beam, resulting in difficulty in installation and locking;

[0006] b) The traditional lock beam is long and has a large difference in the front and rear cross-sectional shapes. In order to ensure the structural strength and anti-deformation capacity of the entire beam, a large number of equal-thickness reinforcing ribs are required, resulting in structural redundancy and excessive weight;

[0007] c) The traditional lock beam needs to be cast as a whole to form the outer surface of the nacelle at the trailing edge to meet the aerodynamic profile requirements, which makes the end structural profile molding complex and greatly increases the difficulty of casting process and tooling design;

[0008] d) The main and auxiliary rail grooves of the traditional locking beam are cylindrical machined structures, which are tightly matched with the beam body. Once the surface is damaged, it is difficult to disassemble and maintain, and it is easy to damage the beam body. Summary of the invention

[0009] In order to solve one of the above problems, the present application provides a locking beam of a reverse thrust device, which mainly includes:

[0010] The left half locking beam assembly comprises a left half locking beam body, wherein the left half locking beam body has an inner side facing the right half locking beam assembly and an outer side facing away from the right half locking beam assembly, the outer side of the left half locking beam body has a guide rail groove for connecting the left half unit of the reverse thrust device, the bottom end of the inner side of the left half locking beam body has a plurality of centering positioning pins protruding from the inner side, the bottom end of the left half locking beam body is provided with a long bolt penetrating along the axial direction of the reverse thrust device, the long bolt is exposed at a plurality of notches at the bottom end of the left half locking beam body to form a mounting point;

[0011] The right half-locking beam assembly comprises a right half-locking beam body, wherein the right half-locking beam body has an inner side surface facing the left half-locking beam assembly and an outer side surface facing away from the left half-locking beam assembly, the outer side surface of the right half-locking beam body has a guide groove for connecting the right half unit of the reverse thrust device, the bottom end of the inner side surface of the right half-locking beam body has a plurality of locating pin holes adapted to accommodate the centering locating pins, and a plurality of closed locks are fixed to the bottom end of the inner side surface of the right half-locking beam body, and the closed locks have hooks for mounting at the mounting point of the long bolt.

[0012] Preferably, the guide rail groove on the outer side surface of the left half locking beam body and the guide rail groove on the outer side surface of the right half locking beam body each include a main guide groove extending axially along the reverse thrust device and an auxiliary guide rail groove extending axially along the reverse thrust device, the main guide groove is a slide groove with a circular cross-section, and the auxiliary guide rail groove is a slide groove with an L-shaped cross-section.

[0013] Preferably, the auxiliary guide rail groove is fixed on the outer surface of the left half locking beam body or the right half locking beam body by means of blind rivets.

[0014] Preferably, the L-shaped slide groove of the auxiliary guide rail groove includes a first panel, a second panel arranged on one side of the first panel and vertically connected to the first panel, and a third panel arranged on one side of the second panel and vertically connected to the second panel, the third panel is parallel to the first panel, the first panel is fit and fixed on the outer side of the left half locking beam body or the right half locking beam body, the L-shaped slide groove refers to the groove space surrounded by the first panel, the second panel and the third panel, and the auxiliary guide rail located in the L-shaped slide groove is an L-shaped structure.

[0015] Preferably, a main rail groove bushing is installed in the main rail groove, and the main rail groove bushing is fixed in the main rail groove by bolts.

[0016] Preferably, the left half locking beam body and the right half locking beam body are both multi-cavity box structures, and the interior of the multi-cavity box structure is optimized according to the pressure distribution from front to back along the axial direction of the reverse thrust device to form a variable thickness reinforcement structure.

[0017] Preferably, the tail ends of the left half-locking beam body and the right half-locking beam body are detachably mounted with a first support plate and a second support plate, the first support plate being used to cover the outer side surfaces of the tail ends of the left half-locking beam body and the right half-locking beam body, and the second support plate being used to cover the inner side surfaces of the tail ends of the left half-locking beam body and the right half-locking beam body, and the tail end refers to the end of the gas flow direction in the reverse thrust device.

[0018] Preferably, the left half-locking beam body and the right half-locking beam body both have a skin, which extends to the bottom end of the left half-locking beam body or the right half-locking beam body, and is bent in reverse at the tail end of the left half-locking beam body or the right half-locking beam body to form a bending piece, and the first support plate and the second support plate both have side panels that can be crimped onto the upper and lower surfaces of the bending piece, and are fixed to the bending piece together by blind rivets.

[0019] Preferably, a locating pin bushing is installed in the locating pin hole.

[0020] The reverse thrust device locking beam provided in the present application adopts auxiliary positioning at key interfaces, variable thickness reinforcement structure combined with load distribution, local end face profile compensation, guide rail groove load optimization and other design ideas. On the basis of the general function of the locking beam to transfer load, it also has the advantages of auxiliary centering, local profile compensation, reduced structural weight, and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the load-bearing frame of the reverse thrust device.

[0022] Figure 2 Schematic diagram of an existing locking beam.

[0023] Figure 3 It is a structural schematic diagram of a preferred embodiment of a locking beam of a reverse thrust device provided in the present application.

[0024] Figure 4 This application Figure 3 Right side view of the illustrated embodiment.

[0025] Figure 5 This application Figure 3 Schematic diagram of the installation of the closed lock of the embodiment shown.

[0026] Figure 6 This application Figure 3A schematic diagram of the auxiliary guide rail groove installation of the illustrated embodiment.

[0027] Figure 7 This application Figure 6 Schematic diagram of the auxiliary guide rail groove structure of the illustrated embodiment.

[0028] Figure 8 This application Figure 3 Schematic diagram of variable thickness reinforcement of the illustrated embodiment.

[0029] Fig. 9 This application Figure 3 Schematic diagram of the installation of the first support plate and the second support plate of the embodiment shown.

[0030] Fig.10 This application Figure 3 Schematic diagram of force analysis of the auxiliary guide rail groove of the illustrated embodiment in a centered state.

[0031] Fig.11 This application Figure 3 Schematic diagram of force analysis of the auxiliary guide rail groove of the illustrated embodiment in a non-centered state.

[0032] Among them, 1-left half locking beam body, 2-right half locking beam body, 3-main rail groove, 4-auxiliary rail groove, 5-centering positioning pin, 6-positioning pin hole, 7-first support plate, 8-second support plate, 9-skin, 10-long bolt, 11-closed lock, 12-bolt, 13-nut, 14-blind rivet, 41-first panel, 42-second panel, 43-third panel, 100-left half unit body, 200-right half unit body, 300-locking beam, 301-left half locking beam, 302-right half locking beam. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the implementation of this application will be described in more detail in combination with the drawings in the implementation of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and cannot be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in combination with the drawings.

[0034] The present application provides a locking beam of a reverse thrust device, such as Figure 3-Figure 5 As shown, it mainly includes:

[0035] The left half locking beam assembly comprises a left half locking beam body 1, wherein the left half locking beam body 1 has an inner side facing the right half locking beam assembly and an outer side facing away from the right half locking beam assembly, and the outer side of the left half locking beam body 1 has a guide groove for connecting the left half unit of the reverse thrust device, and the bottom end of the inner side of the left half locking beam body 1 has a plurality of centering positioning pins 5 protruding from the inner side, and the bottom end of the left half locking beam body 1 is provided with a long bolt 10 penetrating along the axial direction of the reverse thrust device, and the long bolt 10 is exposed at a plurality of notches at the bottom end of the left half locking beam body 1 to form a mounting point;

[0036] The right half-locking beam assembly comprises a right half-locking beam body 2, wherein the right half-locking beam body 2 has an inner side surface facing the left half-locking beam assembly and an outer side surface facing away from the left half-locking beam assembly, and the outer side surface of the right half-locking beam body 2 has a guide groove for connecting the right half unit of the reverse thrust device, and the bottom end of the inner side surface of the right half-locking beam body 2 has a plurality of locating pin holes 6 adapted to accommodate the centering locating pins 5, and a plurality of closed locks 11 are fixed to the bottom end of the inner side surface of the right half-locking beam body 2, and the closed locks 11 have hooks for mounting at the mounting point of the long bolt 10.

[0037] The present application installs long bolts 10 along the axial distribution at the lower right side of the left half locking beam body 1, which are used to connect with the lower closed lock 11 of the symmetrical right half locking beam body 2, so as to realize the reverse push left and right half locking. Among them, the long bolts 10 of the left half locking beam body 1 are provided with corresponding centering positioning pins 5 at the locking interface. During the reverse push left and right half unit body locking process, the positioning pin holes 6 at the corresponding positions of the symmetrical right half locking beam body 2 are inserted to play an auxiliary centering and positioning role, effectively reducing the locking difficulty caused by the inconsistent deformation of the reverse push left and right half units.

[0038] In some optional embodiments, the guide rail groove on the outer side surface of the left half locking beam body 1 and the guide rail groove on the outer side surface of the right half locking beam body 2 each include a main guide groove 3 extending along the axial direction of the reverse thrust device and an auxiliary guide rail groove 4 extending along the axial direction of the reverse thrust device, the main guide groove 3 is a slide groove with a circular cross-section, and the auxiliary guide groove 4 is a slide groove with an L-shaped cross-section.

[0039] In some optional embodiments, the auxiliary guide rail groove 4 is fixed to the outer surface of the left half locking beam body 1 or the right half locking beam body 2 by means of a blind rivet 14 .

[0040] like Figure 6As shown, taking the left half locking beam body 1 as an example, the left end face thereof is provided with an auxiliary guide groove 4 by means of bolts 12 and blind rivets 14. In some optional embodiments, a main guide groove bushing is installed in the main guide groove 3. Similarly, the main guide groove bushing is fixed in the main guide groove 3 by means of bolts 12. The function of guiding the motion mechanism to move forward and backward along the reverse thrust axis is realized by means of the above two guide grooves.

[0041] In some optional embodiments, such as Figure 7 As shown, the L-shaped slide groove of the auxiliary guide rail groove 4 includes a first panel 41, a second panel 42 arranged on one side of the first panel and vertically connected to the first panel 41, and a third panel 43 arranged on one side of the second panel 42 and vertically connected to the second panel 42, the third panel 43 is parallel to the first panel 41, the first panel 41 is fitted and fixed on the outer surface of the left half locking beam body 1 or the right half locking beam body 2, the L-shaped slide groove refers to the groove space surrounded by the first panel 41, the second panel 42 and the third panel 43, and the auxiliary guide rail located in the L-shaped slide groove is an L-shaped structure.

[0042] In some optional embodiments, such as Figure 8 As shown, the left half locking beam body 1 and the right half locking beam body 2 are both multi-cavity box structures. The interior of the multi-cavity box structure is optimized according to the pressure distribution from front to back along the axial direction of the reverse thrust device to form a variable thickness reinforcement structure, which effectively reduces the structural weight while ensuring the strength of the component.

[0043] In some optional embodiments, such as Fig. 9 As shown, the tail ends of the left half-locking beam body 1 and the right half-locking beam body 2 are detachably installed with a first support plate 7 and a second support plate 8, the first support plate 7 is used to cover the outer side surface of the tail ends of the left half-locking beam body 1 and the right half-locking beam body 2, and the second support plate 8 is used to cover the inner side surface of the tail ends of the left half-locking beam body 1 and the right half-locking beam body 2, and the tail end refers to the end of the gas flow in the reverse thrust device.

[0044] It can be understood that by installing the first support plate 7 and the second support plate 8 in a detachable manner, it is possible to compensate for the local profile and effectively reduce the difficulty of end casting and machining caused by the irregular profile.

[0045] In some optional embodiments, the specific structures of the first support plate 7 and the second support plate 8 are as follows: Fig. 9As shown, first, the left half-locking beam body 1 and the right half-locking beam body 2 both have a skin 9, and the skin 9 extends at the bottom end of the left half-locking beam body 1 or the right half-locking beam body 2, and is reversely bent at the tail end of the left half-locking beam body 1 or the right half-locking beam body 2 to form a bending piece, and then the first support plate 7 and the second support plate 8 both have side plates that can be pressed on the upper and lower surfaces of the bending piece, and are fixed to the bending piece together by blind rivets 14. The first support plate 7 and the second support plate 8 also have side plate surfaces, which are fixed to the left half-locking beam body 1 or the right half-locking beam body 2 by blind rivets 14.

[0046] In some optional embodiments, a locating pin bushing is installed in the locating pin hole 6 .

[0047] The auxiliary centering function of the present application refers to providing a centering locating pin 5 and a locating pin hole 6 on both sides of the locking interface formed by the closed lock 11 and the long bolt 10 of the locking beam assembly. During the reverse push locking process, the locating pin 5 and the locating pin hole 6 are used to guide and assist the incoordination of the deformation of the left and right half units, thereby achieving centering and reducing the difficulty of locking the left and right halves.

[0048] The present application can achieve local partial surface compensation, specifically by using blind rivets 14 to connect the first support plate 7 and the second support plate 8 that adapt to the pneumatic outer surface at non-load-bearing parts such as the rear edge end of the lock beam, so as to compensate for the local complex surface of the lock beam body, reduce the difficulty of casting and machining, and also achieve low-cost repair by replacing the fixed bracket when deformation or damage occurs in the local area.

[0049] The present application adopts a variable thickness multi-cavity structure, and combines the load distribution law in the left half locking beam body 1 and the right half locking beam body 2 to divide the guide rail beam into multiple reinforced cavity structures of different thicknesses, thereby improving the structural strength while effectively reducing the structural weight.

[0050] The present application optimizes the guide rail groove bearing capacity. Considering the local bearing capacity of the auxiliary guide rail, the auxiliary guide rail groove 4 of the locking beam adopts an L-shaped cross-section design. Compared with the conventional circular cross-section guide rail groove, the L-shaped cross-section guide rail groove can keep the contact section between the guide rail groove and the guide rail under multi-point force, whether the guide rail and the groove body are theoretically centered or not centered. Fig.10 and Fig.11 As shown, compared with the single-point force of the traditional circular guide groove, the single-point load of the guide groove can be effectively reduced.

[0051] The guide rail groove provided in the present application reduces the difficulty of disassembly and assembly and the maintenance cost. By adopting the L-shaped cross-section auxiliary guide rail groove 4 structure, the traditional machine-formed auxiliary guide rail groove is changed into a sheet metal formed part, which is installed in the side opening groove of the guide rail beam body 1 through the core-pulling rivet 14. If the surface is damaged, it can be disassembled and replaced relatively easily.

[0052] This application has an auxiliary centering function, which effectively reduces the difficulty of buckling; the end part adopts a split structure for profile compensation to reduce the difficulty of processing and maintenance; combined with the beam load distribution, an optimized variable-section multi-cavity reinforcement structure is adopted to reduce the structural weight.

[0053] Although the present application has been described in detail above with general descriptions and specific implementation schemes, it is obvious to those skilled in the art that some modifications or improvements may be made to the present application. Therefore, these modifications or improvements made without departing from the spirit of the present application all fall within the scope of protection claimed in the present application.

Claims

1. A locking beam of a reverse thrust device, characterized in that: include: A left half locking beam assembly comprises a left half locking beam body (1), the left half locking beam body (1) having an inner side facing the right half locking beam assembly and an outer side facing away from the right half locking beam assembly, the outer side of the left half locking beam body (1) having a guide rail groove for connecting the left half unit of the reverse thrust device, the bottom end of the inner side of the left half locking beam body (1) having a plurality of centering positioning pins (5) protruding from the inner side, the bottom end of the left half locking beam body (1) having a long bolt (10) penetrating along the axial direction of the reverse thrust device, the long bolt (10) being exposed at a plurality of notches at the bottom end of the left half locking beam body (1) to form a mounting point; The right half-locking beam assembly comprises a right half-locking beam body (2), wherein the right half-locking beam body (2) has an inner side surface facing the left half-locking beam assembly and an outer side surface facing away from the left half-locking beam assembly, the outer side surface of the right half-locking beam body (2) has a guide groove for connecting the right half unit body of the reverse thrust device, the bottom end of the inner side surface of the right half-locking beam body (2) has a plurality of locating pin holes (6) adapted to accommodate the centering locating pins (5), and the bottom end of the inner side surface of the right half-locking beam body (2) is fixed with a plurality of closing locks (11), and the closing locks (11) have hooks for mounting at the mounting point of the long bolt (10).

2. The anti-thrust device locking beam according to claim 1, characterized in that: The guide rail groove on the outer side surface of the left half locking beam body (1) and the guide rail groove on the outer side surface of the right half locking beam body (2) each include a main guide rail groove (3) extending along the axial direction of the reverse thrust device and an auxiliary guide rail groove (4) extending along the axial direction of the reverse thrust device, the main guide rail groove (3) is a sliding groove with a circular cross section, and the auxiliary guide rail groove (4) is a sliding groove with an L-shaped cross section.

3. The anti-thrust device locking beam according to claim 2, characterized in that: The auxiliary guide rail groove (4) is fixed to the outer side surface of the left half-locking beam body (1) or the right half-locking beam body (2) by means of blind rivets (14).

4. The anti-thrust device locking beam according to claim 2, characterized in that: The L-shaped slide groove of the auxiliary guide rail groove (4) includes a first panel (41), a second panel (42) arranged on one side of the first panel and vertically connected to the first panel (41), and a third panel (43) arranged on one side of the second panel (42) and vertically connected to the second panel (42), wherein the third panel (43) is parallel to the first panel (41), and the first panel (41) is fitted and fixed on the outer side of the left half-locking beam body (1) or the right half-locking beam body (2), and the L-shaped slide groove refers to a groove space surrounded by the first panel (41), the second panel (42) and the third panel (43), and the auxiliary guide rail located in the L-shaped slide groove is an L-shaped structure.

5. The anti-thrust device locking beam according to claim 2, characterized in that: A main rail groove bushing is installed in the main rail groove (3), and the main rail groove bushing is fixed in the main rail groove (3) by means of bolts (12).

6. The anti-thrust device locking beam according to claim 1, characterized in that: The left half locking beam body (1) and the right half locking beam body (2) are both multi-cavity box structures, and the interior of the multi-cavity box structure is optimized along the axial direction of the reverse thrust device from front to back to form a variable thickness reinforcement structure according to the pressure distribution.

7. The anti-thrust device locking beam according to claim 1, characterized in that: The tail ends of the left half-locking beam body (1) and the right half-locking beam body (2) are detachably mounted with a first support plate (7) and a second support plate (8), wherein the first support plate (7) is used to cover the outer side surface of the tail ends of the left half-locking beam body (1) and the right half-locking beam body (2), and the second support plate (8) is used to cover the inner side surface of the tail ends of the left half-locking beam body (1) and the right half-locking beam body (2), wherein the tail end refers to the end of the gas flow in the reverse thrust device.

8. The anti-thrust device locking beam according to claim 7, characterized in that: The left half-locking beam body (1) and the right half-locking beam body (2) both have a skin (9), and the skin (9) extends at the bottom end of the left half-locking beam body (1) or the right half-locking beam body (2), and is reversely bent at the tail end of the left half-locking beam body (1) or the right half-locking beam body (2) to form a bending piece. The first support plate (7) and the second support plate (8) both have side plates that can be crimped onto the upper and lower surfaces of the bending piece, and are fixed to the bending piece together by blind rivets (14).

9. The anti-thrust device locking beam according to claim 1, characterized in that: A positioning pin bushing is installed in the positioning pin hole (6).

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