Connecting rod fracture fault simulation device

Abstract

The invention provides a connecting rod fracture fault simulation device, and belongs to the technical field of aircraft structure tests, and the device comprises a first connecting rod end assembly and a second connecting rod end assembly which are respectively connected with the structure of a test piece and are used for replacing a real connecting rod; the fracture simulation fixing assembly is fixedly connected with the first connecting rod end assembly; the fracture simulation rotating assembly is hinged to the fracture simulation fixing assembly through a rotating shaft, and an explosive bolt filling cavity is formed between the fracture simulation rotating assembly and the fracture simulation fixing assembly; the explosive bolt is installed in the explosive bolt filling cavity between the fracture simulation rotating assembly and the fracture simulation fixing assembly, and the explosive bolt enables the fracture simulation fixing assembly and the fracture simulation rotating assembly not to rotate relatively; and when the explosive bolt is exploded and separated, the rotation limitation of the fracture simulation fixing assembly and the fracture simulation rotating assembly is relieved.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft structure testing, and in particular relates to a connecting rod fracture fault simulation device. Background Art

[0002] Aircraft are complex mechanical devices requiring high reliability and safety. Drive links are key components in the flap mechanism. Fracture is a Level I safety risk failure mode, requiring analysis and verification during system development. To study the structural response of flaps after a drive link fracture, a simulated drive link fracture dummy is fabricated to replace the actual intact drive link structure in fracture failure tests. This requires accurate and controllable simulation of drive link fracture in aircraft flap drive link fracture tests, while also ensuring no secondary effects, ease of installation, and consistent installation of the original link structure. Currently, no technical solutions exist for this purpose. Summary of the Invention

[0003] The purpose of the present application is to provide a connecting rod fracture fault simulation device to solve or alleviate at least one problem in the background technology.

[0004] The technical solution of the present application is: a connecting rod fracture fault simulation device, comprising:

[0005] A first connecting rod end assembly and a second connecting rod end assembly are respectively connected to the structure of the test piece and are used to replace the real connecting rod;

[0006] a fracture simulation fixing assembly, which is fixedly connected to the first connecting rod end assembly;

[0007] The fracture simulation rotating assembly is hinged to the fracture simulation fixed assembly via a rotating shaft, and an explosive bolt-filled cavity is provided between the fracture simulation rotating assembly and the fracture simulation fixed assembly;

[0008] An explosive bolt is installed in the explosive bolt-filled cavity between the fracture simulation rotating component and the fracture simulation fixed component, and the explosive bolt prevents the fracture simulation fixed component and the fracture simulation rotating component from rotating relative to each other. When the explosive bolt explodes and separates, the rotation restriction of the fracture simulation fixed component and the fracture simulation rotating component is released.

[0009] In at least some embodiments, one end of the first connecting rod end assembly has a geometric configuration that is exactly the same as that of a real connecting rod structure, and a first spherical bearing is installed in the end, and the other end of the first connecting rod end assembly is provided with a planar structure, and the first connecting rod end assembly is fixedly connected to the fracture simulation fixing assembly through a first through hole on the planar structure through a connecting piece, and the planar structure forms a limiting structure for the explosive bolt installed in the fracture simulation fixing assembly.

[0010] In at least some embodiments, the fracture simulation fixing assembly is a double-ear structure as a whole, and a second through hole is provided at the center position of the end of the double-ear structure, and the second through hole is used to install the rotating shaft; the other end face of the double-ear structure is a plane, and there is a screw hole at each of the four corners of the plane for connecting with the first through hole on the plane structure of the first connecting rod end assembly; a mounting hole for the explosive bolt end to pass through is provided at the center of the end face of the double-ear structure, and a lead connection hole connected to the mounting hole is provided on the side of the double-ear structure, and the detonation cable of the explosive bolt is connected to the external explosive bolt detonation control device through the lead connection hole.

[0011] In at least some embodiments, a plurality of weight-reducing holes are provided on the binaural structure of the fracture simulation fixing assembly.

[0012] In at least some embodiments, one end of the fracture simulation rotating assembly is a semicircular structure, the semicircular structure is filled in the middle of the double-ear structure of the fracture simulation fixed assembly, and an explosive bolt mounting hole is provided at the top center position of the semicircular structure, and a rotating shaft mounting hole is provided in the middle of the fracture simulation rotating assembly, and the rotating shaft mounting hole has the same diameter as the second through hole on the double-ear structure of the fracture simulation fixed assembly, and the other end of the fracture simulation rotating assembly is a screw structure, and the screw structure is connected and fixed to the second connecting rod end assembly through a thread.

[0013] In at least some embodiments, the rotating shaft includes a rotating shaft body with a threaded end and a nut, and the non-threaded end of the rotating shaft body is provided with a flat notch. The rotating shaft body passes through the second through hole of the fracture simulation fixing component and the rotating shaft mounting hole of the fracture simulation rotating component and cooperates with the nut, thereby realizing the articulation of the fracture simulation fixing component and the fracture simulation rotating component.

[0014] In at least some embodiments, the shaft is provided with hollow holes along the axis of the shaft for reducing weight.

[0015] In at least some embodiments, the explosive bolt has a left boss and a right boss extending along the axis, the left boss is installed in the mounting hole of the fracture simulation fixing assembly, and the right boss is installed in the explosive bolt mounting hole of the fracture simulation rotating assembly. The explosive bolt is provided with a detonating cable, and the detonating cable is connected to or passes through the lead connection hole of the fracture simulation fixing assembly.

[0016] In at least some embodiments, one end of the second connecting rod end assembly has a geometric configuration that is exactly the same as that of a real connecting rod structure, and a second spherical bearing is arranged in this end. The other end of the second connecting rod end assembly is provided with an axially extending threaded hole, and the threaded hole is connected to the screw structure of the fracture simulation rotating assembly. The non-spherical bearing end of the second connecting rod end assembly is provided with a tightening portion for fastening and installation.

[0017] In at least some embodiments, the spacing between the joint bearings at both ends of the first connecting rod end assembly and the second connecting rod end assembly is equal to the spacing between the joint bearings of the real connecting rod. During the installation process, the number of screw connections between the threaded hole of the second connecting rod end assembly and the screw structure of the fracture simulation rotating assembly is adjusted by rotating to ensure the overall installation size and tolerance of the connecting rod fracture fault simulation device.

[0018] The connecting rod fracture fault simulation device provided in the present application uses an explosive bolt to perform fault simulation. After the explosive bolt is detonated and fractured, the fracture simulation of the connecting rod is realized. The detonation can be controlled remotely manually or by program, and has the advantages of controllable explosion time and reliable fracture of the connecting rod. In the fracture fault simulation device of the present application, the broken core or pin is wrapped in a metal cavity, and the high-energy explosive generated after the explosion of the explosive bolt is contained and stored in the cavity and will not fly out, thereby having high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions provided by this application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application.

[0020] Figure 1 This is the overall schematic diagram of the connecting rod fracture fault simulation device of this application

[0021] Figure 2 This is a schematic diagram of the first connecting rod end structure in this application.

[0022] Figure 3 Schematic diagram of the fracture simulation fixing structure in this application.

[0023] Figure 4 Schematic diagram of the fracture simulation rotating component structure in this application.

[0024] Figure 5 This is a schematic diagram of the second connecting rod end structure in this application.

[0025] Figure 6 This is a schematic diagram of the explosive bolt structure in this application.

[0026] Figure 7 This is a schematic diagram of the shaft structure in this application.

[0027] Reference numerals:

[0028] 1-first connecting rod end assembly, 11-first spherical bearing, 12-first through hole, 13-plane structure;

[0029] 2-Connecting bolts;

[0030] 3-fracture simulation fixing component, 31-second through hole, 32-weight reduction hole, 33-screw hole, 34-mounting hole, 35-lead connection hole;

[0031] 4-explosive bolt, 41-left boss, 42-right boss, 43-detonating cable;

[0032] 5-rotating shaft, 51-rotating shaft body, 52-nut, 53-empty hole, 54-plane notch;

[0033] 6-fracture simulation rotating assembly, 61-explosive bolt mounting hole, 62-rotating shaft mounting hole, 63-screw structure;

[0034] 7-second connecting rod end assembly, 71-second joint bearing, 72-tightening part, 73-threaded hole. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the drawings in the embodiments of this application.

[0036] In order to accurately and controllably implement connecting rod fracture in aircraft flap drive connecting rod fracture failure test, while making the fracture mode and location the same or similar to the real connecting rod, and without changing the installation method of the original connecting rod structure, the present application proposes a connecting rod fracture failure simulation device, which can accurately and controllably realize connecting rod fracture simulation in the test.

[0037] The present application uses a method in which a connecting rod dummy including an explosive bolt is hinged and loosened after the explosive bolt explodes and separates to simulate a connecting rod fracture fault / failure.

[0038] like Figure 1 As shown, the connecting rod fracture fault simulation device provided by the present application includes: a first connecting rod end assembly 1, a connecting bolt 2, a fracture simulation fixing assembly 3, an explosive bolt 4, a rotating shaft 5, a fracture simulation rotating assembly 6, and a second connecting rod end assembly 7. The first connecting rod end assembly 1 is connected to the fracture simulation fixing assembly 3 by multiple bolts 2. The fracture simulation fixing assembly 3 is provided with an opening structure. The fracture simulation rotating assembly 6 is arranged in the opening structure and is hinged to the fracture simulation fixing assembly 3 by the rotating shaft 5. The explosive bolt 4 is arranged in the cavity formed by the opening structure of the fracture simulation fixing assembly 3 and the fracture simulation rotating assembly 6. It limits and locks the fracture simulation rotating assembly 6 so that the fracture simulation rotating assembly 6 cannot rotate relative to the hollow rotating shaft 5. The end of the fracture model rotating assembly 6 is connected and fixed to the second connecting rod end assembly 7 by a screw. The two ends of the first connecting rod end assembly 1 and the second connecting rod end assembly 7 are respectively connected to the structure of the test piece to replace the real connecting rod.

[0039] After the explosive bolt 4 is detonated and separated, the fixed connection between the fracture simulation fixing component 3 and the fracture simulation rotating component 6 is destroyed. The first connecting rod end component 1 and the fracture simulation fixing component 3 on the left and the second connecting rod end component 7 and the fracture simulation rotating component 6 on the right can rotate around the central axis of the rotating shaft 5, and thus cannot transmit tensile and compressive loads, thereby simulating a connecting rod fracture fault or failure mode.

[0040] The first connecting rod end assembly 1 is used to simulate the left end of the real connecting rod structure and its connection with the test piece. Figure 2 The figure shows a schematic diagram of the structure of the first connecting rod end assembly in the present application. The geometric configuration of the left end of the first connecting rod end assembly 1 is exactly the same as that of the real connecting rod structure, and is installed with a first spherical bearing 11. The other end of the first connecting rod end assembly 1 is provided with a planar structure 13, and the edge of the planar structure 13 is provided with four first through holes 12. The planar structure 13 is fixedly connected to the fracture simulation fixing assembly 3 by connecting bolts 2 passing through the first through holes 12. The first connecting rod end assembly 1 supports the tail of the explosive bolt 4 filled with the explosive bolt cavity in the middle of the fracture simulation fixing assembly 3 through the planar structure 13.

[0041] The fracture simulation fixing assembly 3 is used to load one end of the explosive bolt 4 and simulate the rotation hinge after fracture failure or failure. Figure 3 The diagram shows the structure of the fracture simulation fixing assembly in this application. The fracture simulation fixing assembly 3 generally has a double-ear structure. A second through-hole 31 is located at the center of the right end of the double-ear structure. This second through-hole 31 is used to mount the rotating shaft 5, which forms a hinged structure with the fracture simulation rotating assembly 6. The double-ear structure of the fracture simulation fixing assembly 3 is provided with weight-reducing holes 22. These holes 22 can typically be circular, elongated, elliptical, or other shapes that do not generate stress concentration. The left end surface of the double-ear structure is flat, with second screw holes 33 located at its four corners for connection to the first connecting rod end assembly 1. A mounting hole 34 is located at the center of the left end surface of the double-ear structure, through which the end of the explosive bolt 4 passes. Mounting hole 34 can be designed based on the shape of the lead wire end of the explosive bolt 4. Furthermore, a lead wire connection hole 35 is located on the side of the base of the double-ear structure of the fracture simulation fixing assembly 3. Lead wire connection hole 35 communicates with mounting hole 34. The control lead wire of the explosive bolt 4 is connected to the external explosive bolt detonation control device through lead wire connection hole 35.

[0042] In this application, the center height between the two ear structures of the fracture simulation fixed component 3 is a design parameter, which needs to satisfy the requirement of maintaining a suitable gap value between the root platform part of the ear piece of the fracture simulation fixed component 3 and the end of the explosive bolt cavity of the fracture simulation rotating component 6.

[0043] The fracture simulation rotating assembly 6 is used to load the explosive bolt 4, and together with the fracture simulation fixing assembly 3 simulates the rotation hinge after the connecting rod fracture failure or failure. Figure 4 The figure shows a schematic diagram of the fracture simulation rotating assembly structure in the present application. The left end of the fracture simulation rotating assembly 6 is a semicircular structure, which is filled in the middle of the double-ear structure of the fracture simulation fixed assembly 3. An explosive bolt mounting hole 61 is provided at the top center of the semicircular structure. The explosive bolt mounting hole 62 is used to install the end of the explosive bolt 4. A shaft mounting hole 62 is provided in the middle of the fracture simulation rotating assembly 6. The shaft mounting hole 62 has the same diameter as the second through hole 31 on the double-ear structure of the fracture simulation fixed assembly 3. The shaft 5 passes through the second through hole 31 and the shaft mounting hole 62 to realize the hinge connection with the fracture simulation fixed assembly 3. The right end of the fracture simulation rotating assembly 6 is a screw structure 63, which can be connected and fixed to the second connecting rod end assembly 7 through a thread.

[0044] like Figure 5 The figure shows a schematic diagram of the rotating shaft in the present application, in which the rotating shaft 5 includes a rotating shaft body 51 with threads at the end and a nut 52. The diameter of the rotating shaft body 51 is the same as the diameter of the second through hole 31 in the double-ear structure of the fracture simulation fixing component 3 and the diameter of the rotating shaft mounting hole 62 of the fracture simulation rotating component 6. In a preferred embodiment of the present application, an empty hole 53 is provided along the axis of the rotating shaft 5 for weight reduction. The empty hole 53 can be a through-type through hole for weight reduction. A flat notch 54 is provided at the non-threaded end of the rotating shaft body 51 for easy installation and fixation. The flat notch 54 can generally be set as two or more. For example, in the illustrated embodiment, there are two flat notches 54, and the two flat notches 54 are evenly distributed along the axis of the rotating shaft body 51. For example, the flat notch 54 can be obtained by cutting at the non-threaded end of the rotating shaft body 51.

[0045] The second connecting rod end assembly 7 is used to simulate the other end of the real connecting rod structure and its connection with the test piece. Figure 6 The figure shows a schematic diagram of the second connecting rod end assembly in the present application. The right end of the second connecting rod end assembly 7 is used for test piece connection. The geometric configuration of its end is exactly the same as that of the real connecting rod structure. A second spherical bearing 71 is provided in the right end of the second connecting rod end assembly 7. The left end of the second connecting rod end assembly 7 is provided with an axially extending threaded hole 73, which is used to connect with the screw structure 63 of the fracture simulation rotation assembly 6. At the same time, the left end of the second connecting rod end assembly 7 is provided with a tightening portion 72 for tightening the second connecting rod end assembly 7 with a wrench or tool. Exemplarily, the tightening portion 72 of the second connecting rod end assembly 7 is a hexagonal structure, which is convenient for the use of an open-end wrench.

[0046] In the present application, the distance between the joint bearings at both ends of the first connecting rod end assembly 1 and the second connecting rod end assembly 7 is equal to the bearing spacing in the real connecting rod. During the installation process, the number of screw connections between the threaded hole 73 of the second connecting rod end assembly 7 and the screw structure 63 of the fracture simulation rotating assembly 6 can be adjusted by rotating to ensure the overall installation size and tolerance of the connecting rod fracture fault simulation device.

[0047] like Figure 7 Shown is a schematic diagram of the explosive bolt in the present application. The explosive bolt 4 is used to constitute a fracture generator, which has a left boss 41 and a right boss 42 extending along the axis. The left boss 41 is installed in the mounting hole 34 of the fracture simulation fixing component 3, and the right boss 42 is installed in the explosive bolt mounting hole 61 of the fracture simulation rotating component 6. The detonating cable 43 is connected to or passes through the lead connection hole 35 of the fracture simulation fixing component 3.

[0048] Before explosive bolt 4 explodes and separates, the fracture-simulating fixed assembly 3 and the fracture-simulating rotating assembly 6 are locked together by the explosive bolt 4 and prevented from rotating, allowing the load on the connecting rod to be transmitted normally. After the explosive bolt 4 is detonated via the detonating cable 43, the explosive bolt 4 no longer restrains the fracture-simulating fixed assembly 3 and the fracture-simulating rotating assembly 6. At this time, the fracture-simulating fixed assembly 3 and the fracture-simulating rotating assembly 6 can rotate relative to the rotating shaft 5, thereby simulating a fracture fault or failure mode of the connecting rod.

[0049] The connecting rod fracture fault simulation device provided in the present application uses an explosive bolt to perform fault simulation. After the explosive bolt is detonated and fractured, the fracture simulation of the connecting rod is realized. The detonation can be controlled remotely manually or by program, and has the advantages of controllable explosion time and reliable fracture of the connecting rod. In the fracture fault simulation device of the present application, the broken core or pin is wrapped in a metal cavity, and the high-energy explosive generated after the explosion of the explosive bolt is contained and stored in the cavity and will not fly out, thereby having high safety.

[0050] The joints and rods at both ends of the fracture fault simulation device of the present application are exactly the same as the corresponding parts at both ends of the real structure and are screwed. Some joints are reusable, with good original structure matching, interchangeability and economy, and there is no need to modify the design of the original test piece.

[0051] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A connecting rod fracture fault simulation device, characterized in that: include: A first connecting rod end assembly (1) and a second connecting rod end assembly (2) are respectively connected to the structure of the test piece and are used to replace the real connecting rod; a fracture simulation fixing assembly (3) fixedly connected to the first connecting rod end assembly (1); A fracture simulation rotating assembly (6) is hinged to the fracture simulation fixed assembly (3) via a rotating shaft (5), and an explosive bolt-filled cavity is provided between the fracture simulation rotating assembly (6) and the fracture simulation fixed assembly (3); An explosive bolt (4) is installed in the explosive bolt filling cavity between the fracture simulation rotating component (6) and the fracture simulation fixed component (3), and the explosive bolt (4) prevents the fracture simulation fixed component (3) and the fracture simulation rotating component (6) from rotating relative to each other. When the explosive bolt (4) explodes and separates, the rotation restriction of the fracture simulation fixed component (3) and the fracture simulation rotating component (6) is released.

2. The connecting rod fracture fault simulation device according to claim 1, characterized in that: One end of the first connecting rod end assembly (1) has a geometric configuration identical to that of a real connecting rod structure, and a first joint bearing (11) is installed in the end. The other end of the first connecting rod end assembly (1) is provided with a plane structure (13). The first connecting rod end assembly (1) is fixedly connected to the fracture simulation fixing assembly (3) through a first through hole (12) on the plane structure (13) via a connecting piece, and the plane structure (13) forms a limiting structure for an explosive bolt (4) installed in the fracture simulation fixing assembly (3).

3. The connecting rod fracture fault simulation device according to claim 2, characterized in that: The fracture simulation fixing assembly (3) is in the form of a double-ear structure as a whole, and a second through hole (31) is provided at the center of the end of the double-ear structure, and the second through hole (31) is used to install the rotating shaft (5); the other end face of the double-ear structure is a plane, and each of the four corners of the plane has a screw hole (33) for connecting with the first through hole (12) on the plane structure (13) of the first connecting rod end assembly (1); a mounting hole (34) through which the end of the explosive bolt (4) passes is provided at the center of the end face of the double-ear structure, and a lead connection hole (35) connected to the mounting hole (34) is provided on the side of the double-ear structure, and the detonation cable of the explosive bolt (4) is connected to the external explosive bolt detonation control device through the lead connection hole (35).

4. The connecting rod fracture fault simulation device according to claim 3, characterized in that: A plurality of weight-reducing holes (32) are provided on the double-ear structure of the fracture simulation fixing component (3).

5. The connecting rod fracture fault simulation device according to claim 2 or 3, characterized in that: One end of the fracture simulation rotating component (6) is a semicircular structure, the semicircular structure is filled in the middle of the double-ear structure of the fracture simulation fixed component (3), and an explosive bolt mounting hole (61) is provided at the top center position of the semicircular structure. A rotating shaft mounting hole (62) is provided in the middle of the fracture simulation rotating component (6), and the rotating shaft mounting hole (62) has the same diameter as the second through hole (31) on the double-ear structure of the fracture simulation fixed component (3). The other end of the fracture simulation rotating component (6) is a screw structure (63), and the screw structure (63) is connected and fixed to the second connecting rod end component (7) through a thread.

6. The connecting rod fracture fault simulation device according to claim 5, characterized in that: The rotating shaft (5) comprises a rotating shaft body (51) with a threaded end and a nut (52); the non-threaded end of the rotating shaft body (51) is provided with a planar notch (54); the rotating shaft body (51) passes through the second through hole (31) of the fracture simulation fixing component (3) and the rotating shaft mounting hole (62) of the fracture simulation rotating component (6) and cooperates with the nut (52), thereby realizing the articulation of the fracture simulation fixing component (3) and the fracture simulation rotating component (6).

7. The connecting rod fracture fault simulation device according to claim 6, characterized in that: The rotating shaft (5) is provided with an empty hole (53) along the axis of the rotating shaft for reducing weight.

8. The connecting rod fracture fault simulation device according to claim 6, characterized in that: The explosive bolt (4) has a left boss (41) and a right boss (42) extending along an axis, the left boss (41) is mounted in a mounting hole (34) of a fracture simulation fixing assembly (3), and the right boss (42) is mounted in an explosive bolt mounting hole (61) of a fracture simulation rotating assembly (6). A detonating cable (43) is provided on the explosive bolt (4), and the detonating cable (43) is connected to or passes through a lead connection hole (35) of the fracture simulation fixing assembly (3).

9. The connecting rod fracture fault simulation device according to claim 8, characterized in that: One end of the second connecting rod end assembly (7) has a geometric configuration that is completely identical to that of a real connecting rod structure, and a second joint bearing (71) is arranged in the end. The other end of the second connecting rod end assembly (7) is provided with an axially extending threaded hole (73), and the threaded hole (73) is connected to the screw structure (63) of the fracture simulation rotation assembly (6). The non-joint bearing end of the second connecting rod end assembly (7) is provided with a tightening portion (72) for fastening and installation.

10. The connecting rod fracture fault simulation device according to claim 9, characterized in that: The spacing between the joint bearings at both ends of the first connecting rod end assembly (1) and the second connecting rod end assembly (7) is equal to the spacing between the joint bearings of the real connecting rod. During the installation process, the number of screw connections between the threaded hole (73) of the second connecting rod end assembly (7) and the screw structure (63) of the fracture simulation rotating assembly (6) is adjusted by rotation to ensure the overall installation size and tolerance of the connecting rod fracture fault simulation device.

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