Fatigue strength test device for blade lattice type reverse thrust structure of airplane

Abstract

The utility model discloses a fatigue strength test device for an airplane cascade type reverse thrust structure, which comprises a test base, a reverse thrust device, a cascade plate, a force sensor and a hydraulic cylinder, the reverse thrust device is arranged at the top of the test base, the output end of the hydraulic cylinder is positioned on one side of the force sensor, and the force sensor is arranged on one side of the cascade plate. The fixing ring, the limiting groove, the limiting ring, the mounting ring, the fixing column and the rotating ring are arranged in the quick replacement assembly, the fixing column and the mounting ring are in threaded connection, the limiting ring and the limiting groove are in movable clamping connection, and the rotating ring is in anti-skid design; the output end fixing column of the hydraulic cylinder can be quickly assembled and disassembled on one side of the force sensor by rotating the mounting ring, so that when the hydraulic cylinder is maintained or breaks down, the device can quickly complete part replacement without complicated tools, the downtime is greatly shortened, and the test continuity is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of strength testing devices, specifically: a fatigue strength testing device for an aircraft blade cascade type reverse thrust structure. Background Technology

[0002] The aircraft blade-type thrust reverser structure fatigue strength testing device is used to test the fatigue strength of this type of thrust reverser structure in order to evaluate the reliability and safety of the structure in long-term use and ensure the stable operation of the aircraft thrust reverser system.

[0003] Utility model patent CN207556823U discloses a fatigue strength testing device for an aircraft engine blade-type thrust reverser structure. The device includes a simulated blade, a load loading device, and a base. The simulated blade is bolted to the thrust reverser at both ends and has pin holes. The load loading device includes a loading rod, a force sensor, and a hydraulic actuator connected in sequence. One end of the loading rod has a single lug with a ball bearing, which is connected to the pin hole of the simulated blade via a pin. The base is fixed to a foundation platform and connected to the hydraulic actuator. This device uses a concentrated load instead of a pneumatic load, greatly simplifying the entire thrust reverser test device, improving test efficiency, saving significant test costs, and shortening the test cycle.

[0004] Existing testing equipment uses hydraulic cylinders for pushing tests. Due to the need for high-frequency reciprocating motion over long periods, the hydraulic cylinders may experience reduced operating efficiency or even malfunction due to factors such as seal wear and oil overheating. Furthermore, since the hydraulic cylinders use a fixed connection structure, when malfunctions occur or maintenance is required, there are problems such as cumbersome disassembly procedures and difficulties in positioning and calibration, which in turn affect the continuous operation of the testing equipment and the optimization of test results.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0006] In view of the problems in the related technologies, this utility model proposes a fatigue strength testing device for aircraft blade cascade type reverse thrust structure to overcome the above-mentioned technical problems existing in the existing related technologies.

[0007] Therefore, the specific technical solution adopted by this utility model is as follows:

[0008] A fatigue strength testing device for an aircraft blade-type thrust reverser structure includes a test base, a thrust reverser, a blade cascade, a force sensor, and a hydraulic cylinder. The thrust reverser is mounted on the top of the test base. The output end of the hydraulic cylinder is located on one side of the force sensor. The force sensor is mounted on one side of the blade cascade, and the blade cascade is mounted on the outside of the thrust reverser. A quick-change assembly is installed on the side of the force sensor near the hydraulic cylinder. The quick-change assembly includes a retaining ring. A limiting groove is formed on the other side of the retaining ring. A limiting ring is movably connected to the inner wall of the limiting groove. An installation ring is installed on one side of the limiting ring. A fixing post is installed on the output end of the hydraulic cylinder. The surface of one set of fixing posts is threadedly connected to the inside of the installation ring.

[0009] The test base has a movable replacement assembly on its top. The movable replacement assembly includes a fixed groove. An electric slide rail is installed at the bottom of the inner wall of the fixed groove. A slider is installed at the output end of the electric slide rail. Several sliders are provided and are arranged at equal distances. An mounting plate is installed on the top of the slider. An adjustable movable shaft is installed on the top of the mounting plate. The hydraulic cylinder is located on the top of the adjustable movable shaft.

[0010] Preferably, a fixed plate is installed on the top of the adjustable movable shaft, a fixed box is installed on the top of the fixed plate, an electromagnetic block is installed on the inner side of the inner wall of the fixed box, a spring is installed on the outer side of the electromagnetic block, a positioning plate is installed on the other end of the spring, the electromagnetic block is magnetically connected to the positioning plate, a mounting bracket is provided on the outer side of the positioning plate, and the mounting bracket is installed on the outer side of the hydraulic cylinder.

[0011] Preferably, the mounting bracket has a positioning groove on its outer side, the surface of the positioning plate is located on the inner wall of the positioning groove, and a plug block is slidably inserted into the outer side of the top of the positioning plate.

[0012] Preferably, a sliding block is installed on the inner side of the plug-in block, and a sliding groove is provided on the outer side of the mounting bracket, with the surface of the sliding block slidably connected to the inner wall of the sliding groove.

[0013] Preferably, a rotating ring is installed on the outer side of the mounting ring, and an anti-slip ring is sleeved on the outer side of the rotating ring.

[0014] Preferably, a sealing plate is installed at the bottom of the mounting bracket, and a sealing groove is formed at the top of the fixing plate, with the surface of the sealing plate being movably connected to the interior of the sealing groove.

[0015] Preferably, an accordion-style protective cover is installed on the outer side of the slider, and the outer side of the accordion-style protective cover is installed with the outer side of the inner wall of the fixing groove.

[0016] Preferably, a reinforcing block is installed on the top of the mounting frame, and a plurality of reinforcing blocks are provided, which are arranged at equal intervals. The inner side of the reinforcing block is installed on the outer side of the hydraulic cylinder.

[0017] The beneficial effects of this utility model are as follows:

[0018] I. This utility model, by setting up a quick-change assembly with a fixed ring, a limiting groove, a limiting ring, a mounting ring, a fixed post, and a rotating ring, and through the threaded connection between the fixed post and the mounting ring, the movable snap-fit ​​between the limiting ring and the limiting groove, and the anti-slip design of the rotating ring, allows the fixed post at the output end of the hydraulic cylinder to be quickly installed and removed from the force sensor side via the rotating mounting ring. Thus, this device can quickly replace components without complicated tools when the hydraulic cylinder is being maintained or malfunctioning, significantly shortening downtime and improving the continuity of testing.

[0019] II. This utility model, by setting up an electric slide rail, slider, mounting plate, and adjustable movable shaft in the movable replacement component, and positioning structure electromagnetic block, spring, positioning plate and mounting bracket, drives the slider to move the hydraulic cylinder laterally to adjust its position. With the dual effect of the electromagnetic block being energized to attract the positioning plate and the spring resetting and tightening, the hydraulic cylinder can be easily replaced and used, avoiding the situation where a single hydraulic cylinder will fail after long-term use.

[0020] Third, this utility model, by setting a sealing plate and sealing groove, along with a bellows-style protective cover and reinforcing block, and through the nesting and cooperation of the sealing plate and sealing groove, and the bellows-style protective cover covering the slider and slide rail, enables the key moving parts of the device to be physically isolated to prevent dust intrusion. Combined with the reinforcement block to strengthen the structure of the mounting frame, it enhances the stability of the hydraulic cylinder during adjustment and use. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the fatigue strength testing device for an aircraft blade cascade type reverse thrust structure according to the present invention;

[0023] Figure 2 This is a split diagram of a fatigue strength testing device for an aircraft blade cascade-type reverse thrust structure according to the present invention;

[0024] Figure 3 This is a schematic diagram of the quick-change component of this utility model;

[0025] Figure 4 This is a schematic diagram of the installation and assembly of the hydraulic cylinder of this utility model;

[0026] Figure 5 This is an exploded view of the hydraulic cylinder of this utility model.

[0027] In the picture:

[0028] 1. Test base; 2. Thrust reverser; 3. Blade plate; 4. Force sensor; 5. Hydraulic cylinder; 6. Quick change component; 61. Fixing ring; 62. Limiting groove; 63. Limiting ring; 64. Mounting ring; 65. Fixing column; 7. Moving change component; 71. Fixing groove; 72. Electric slide rail; 73. Slider; 74. Mounting plate; 75. Adjustable movable shaft; 8. Fixing plate; 9. Fixing box; 10. Electromagnetic block; 11. Spring; 12. Positioning plate; 13. Mounting bracket; 14. Positioning groove; 15. Insertion block; 16. Sliding block; 17. Slide groove; 18. Rotating ring; 19. Anti-slip ring; 20. Sealing plate; 21. Sealing groove; 22. Bellows-style protective cover; 23. Reinforcing block. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] According to embodiments of the present invention, refer to the appendix. Figure 1-5A fatigue strength testing device for an aircraft blade-type thrust reverser structure is provided, comprising: a test base 1, a thrust reverser 2, a blade cascade 3, a force sensor 4, and a hydraulic cylinder 5. The thrust reverser 2 is mounted on the top of the test base 1. The output end of the hydraulic cylinder 5 is located on one side of the force sensor 4. The force sensor 4 is mounted on one side of the blade cascade 3, and the blade cascade 3 is mounted on the outside of the thrust reverser 2. A quick-change assembly 6 is installed on the side of the force sensor 4 near the hydraulic cylinder 5. The quick-change assembly 6 includes a fixing ring 61, and a limiting groove 62 is formed on the other side of the fixing ring 61. A limiting ring 63 is movably connected to the inner wall of the limiting groove 62. An installation ring 64 is installed on one side of the limiting ring 63. A fixing post 65 is installed on the output end of the hydraulic cylinder 5. The surface of one set of fixing posts 65 is threadedly connected to the inside of the installation ring 64. A movable replacement assembly 7 is provided on the top of the test base 1. The movable replacement assembly 7 includes a fixing groove 71. An electric slide rail 72 is installed at the bottom of the inner wall of the fixing groove 71. A slider 73 is installed at the output end of the electric slide rail 72. Several sliders 73 are provided. Several sliders 73 are arranged at equal intervals. A mounting plate 74 is installed on the top of each slider 73, and an adjustable movable shaft 75 is installed on the top of the mounting plate 74. A hydraulic cylinder 5 is located on top of the adjustable movable shaft 75. The test base 1 serves as a basic support component for mounting the thrust reverser 2. The thrust reverser 2 supports the blade cascade 3, simulating the blade cascade type thrust reverser structure of an aircraft engine. A force sensor 4 is used to monitor the force applied by the hydraulic cylinder 5 in real time. The hydraulic cylinder 5 serves as a power source to provide thrust. In the quick-change assembly 6, the retaining ring 61 and the limit... The groove 62 is matched with the limit ring 63 and the mounting ring 64 to connect the force sensor 4. The fixed column 65 and the mounting ring 64 are threaded to the output end of the hydraulic cylinder 5. The rotating ring 18 and the anti-slip ring 19 facilitate the manual and quick disassembly and assembly of the fixed column 65, realizing the quick connection and separation of the hydraulic cylinder 5 and the force sensor 4. In the movable replacement component 7, the electric slide rail 72 in the fixed groove 71 drives the slider 73 to move laterally. The slider 73 supports the hydraulic cylinder 5 through the mounting plate 74 and the adjustable movable shaft 75, realizing the position adjustment and switching of multiple sets of hydraulic cylinders 5.

[0031] A fixed plate 8 is installed on the top of the adjustable movable shaft 75, and a fixed box 9 is installed on the top of the fixed plate 8. An electromagnetic block 10 is installed on the inner side of the inner wall of the fixed box 9, and a spring 11 is installed on the outer side of the electromagnetic block 10. A positioning plate 12 is installed on the other end of the spring 11. The electromagnetic block 10 and the positioning plate 12 are magnetically connected. A mounting bracket 13 is provided on the outer side of the positioning plate 12. The mounting bracket 13 is installed on the outer side of the hydraulic cylinder 5. The fixed plate 8 on the top of the adjustable movable shaft 75 supports the fixed box 9. When the electromagnetic block 10 is energized, it magnetically attracts the positioning plate 12 and compresses the spring 11. When the power is off, the spring 11 returns to its original position and presses against the positioning plate 12. The outer side of the positioning plate 12 fits against the mounting bracket 13, fixing the hydraulic cylinder 5 to the top of the adjustable movable shaft 75. Through the dual action of the electromagnetic block 10 and the spring 11, the hydraulic cylinder 5 can be quickly positioned and locked during installation, which facilitates the replacement of hydraulic cylinders 5 in different positions and avoids failure caused by long-term use of a single hydraulic cylinder 5.

[0032] A positioning groove 14 is provided on the outer side of the mounting bracket 13. The surface of the positioning plate 12 is located on the inner wall of the positioning groove 14. A plug-in block 15 is slidably inserted into the outer side of the top of the positioning plate 12. The positioning groove 14 on the outer side of the mounting bracket 13 provides insertion space for the positioning plate 12. After the plug-in block 15 on the top of the positioning plate 12 is inserted into the positioning groove 14, it restricts the lateral movement of the positioning plate 12, enhances the stability of the hydraulic cylinder 5 when it is fixed, prevents the hydraulic cylinder 5 from shifting due to vibration during the test, and ensures the accuracy of the loading force. A sliding block 16 is installed on the inner side of the plug-in block 15. A sliding groove 17 is provided on the outer side of the mounting bracket 13. The surface of the sliding block 16 is slidably connected to the inner wall of the sliding groove 17. The sliding block 16 on the side is slidably connected to the sliding groove 17 on the outer side of the mounting bracket 13, providing guidance and limiting for the insertion block 15, so that the insertion block 15 can only move vertically along the sliding groove 17, avoiding the insertion block 15 from tilting and getting stuck. A rotating ring 18 is installed on the outer side of the mounting ring 64, and an anti-slip ring 19 is sleeved on the outer side of the rotating ring 18. The rotating ring 18 on the outer side of the mounting ring 64 facilitates manual rotation of the mounting ring 64, and the anti-slip ring 19 increases the friction during rotation to prevent slippage, making the threaded connection between the fixing column 65 and the mounting ring 64 more convenient and efficient to disassemble and assemble, further shortening the replacement time of the hydraulic cylinder 5. A sealing plate 20 is installed at the bottom of the mounting bracket 13, and a sealing groove 21 is opened on the top of the fixing plate 8 to seal. The surface of the sealing plate 20 is movably connected to the interior of the sealing groove 21. A bellows-style protective cover 22 is installed on the outside of the slider 73. The outside of the bellows-style protective cover 22 is installed on the outside of the inner wall of the fixing groove 71. A reinforcing block 23 is installed on the top of the mounting frame 13. Several reinforcing blocks 23 are provided and are arranged at equal intervals. The inside of the reinforcing block 23 is installed on the outside of the hydraulic cylinder 5. The sealing plate 20 at the bottom of the mounting frame 13 is embedded in the sealing groove 21 at the top of the fixing plate 8 to form a physical seal, preventing dust and debris from entering the connection gap between the adjustable movable shaft 75 and the fixing plate 8. At the same time, the cooperation between the sealing plate 20 and the sealing groove 21 enhances the installation accuracy of the mounting frame 13. To improve the stability of the hydraulic cylinder 5 when it is fixed, the accordion-style protective cover 22 on the outside of the slider 73 covers the electric slide rail 72 and the slider 73 in the fixing groove 71. It moves and extends with the slider 73, isolating dust, oil and other impurities, preventing the slide rail from jamming or wearing due to contamination, extending the service life of the moving replacement component 7, and ensuring the smooth adjustment of the hydraulic cylinder 5 position. Several reinforcing blocks 23 on the inside of the mounting frame 13 are evenly distributed and fixedly connected to the outside of the hydraulic cylinder 5, enhancing the structural strength of the connection between the mounting frame 13 and the hydraulic cylinder 5, dispersing the vibration and load borne by the hydraulic cylinder 5 during the test, improving the overall vibration resistance and stability of the device, and ensuring the reliability of the fatigue strength test.

[0033] Working principle: When a single hydraulic cylinder 5 has been running for a long time and needs to be replaced or maintained, the operator can rotate the mounting ring 64 by turning the anti-slip ring 19 on the outside of the rotating ring 18. The fixing post 65 can be unscrewed by using the threaded connection between the fixing post 65 and the mounting ring 64 to complete the disassembly. Then, the electric slide rail 72 is started, which drives the several sliders 73 on its top to move. The movement of the sliders 73 can move the hydraulic cylinder 5. When another hydraulic cylinder 5 moves to the bottom of the mounting ring 64, the fixing post 65 on it can be moved into the inside of the mounting ring 64. Then, by rotating the mounting ring 64, the mounting ring 64 is threadedly connected to the fixing post 65, which can be quickly replaced and ensure the continuity of testing.

[0034] When it is necessary to disassemble, maintain or replace the hydraulic cylinder 5, first move the plug block 15 upward. The plug block 15 is moved out of the positioning plate 12 by the slider 73. Then start the electromagnetic block 10 so that the output end of the electromagnetic block 10 magnetically attracts the positioning plate 12, causing the positioning plate 12 to push the spring 11 to move inward and no longer position itself in the positioning groove 14 of the mounting bracket 13. At this time, the user can disassemble the hydraulic cylinder 5.

[0035] The sealing plate 20 at the bottom of the mounting bracket 13 is embedded in the sealing groove 21 of the fixing plate 8. At the same time, the accordion-style protective cover 22 on the outside of the slider 73 moves with the slider 73 to cover the slide rail, thereby achieving dust protection. Meanwhile, the reinforcing block 23 on the inside of the mounting bracket 13 enhances the vibration resistance of the hydraulic cylinder 5.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fatigue strength testing device for an aircraft blade cascade-type thrust reverser structure, comprising a test base (1), a thrust reverser (2), a blade cascade plate (3), a force sensor (4), and a hydraulic cylinder (5), characterized in that: The thrust reverser (2) is installed on the top of the test base (1). The output end of the hydraulic cylinder (5) is located on one side of the force sensor (4). The force sensor (4) is installed on one side of the blade plate (3). The blade plate (3) is installed on the outside of the thrust reverser (2). A quick-change assembly (6) is installed on the side of the force sensor (4) near the hydraulic cylinder (5). The quick-change assembly (6) includes a retaining ring (61). A limiting groove (62) is opened on the other side of the retaining ring (61). A limiting ring (63) is movably connected to the inner wall of the limiting groove (62). An installation ring (64) is installed on one side of the limiting ring (63). A fixing column (65) is installed on the output end of the hydraulic cylinder (5). The surface of one set of fixing columns (65) is connected to the internal thread of the installation ring (64). The test base (1) has a movable replacement component (7) on its top. The movable replacement component (7) includes a fixed groove (71). An electric slide rail (72) is installed at the bottom of the inner wall of the fixed groove (71). A slider (73) is installed at the output end of the electric slide rail (72). Several sliders (73) are provided and are arranged at equal distances. An mounting plate (74) is installed on the top of the slider (73). An adjustable movable shaft (75) is installed on the top of the mounting plate (74). The hydraulic cylinder (5) is located on the top of the adjustable movable shaft (75).

2. The fatigue strength testing device for aircraft blade cascade-type thrust reverser structure according to claim 1, characterized in that, A fixing plate (8) is installed on the top of the adjustable movable shaft (75), and a fixing box (9) is installed on the top of the fixing plate (8). An electromagnetic block (10) is installed on the inner side of the inner wall of the fixing box (9), and a spring (11) is installed on the outer side of the electromagnetic block (10). A positioning plate (12) is installed on the other end of the spring (11). The electromagnetic block (10) is magnetically connected to the positioning plate (12). A mounting bracket (13) is provided on the outer side of the positioning plate (12), and the mounting bracket (13) is installed on the outer side of the hydraulic cylinder (5).

3. The fatigue strength testing device for aircraft blade-type thrust reverser structures according to claim 2, characterized in that, The mounting bracket (13) has a positioning groove (14) on its outer side, and the surface of the positioning plate (12) is located on the inner wall of the positioning groove (14). A plug-in block (15) is slidably inserted into the outer side of the top of the positioning plate (12).

4. The fatigue strength testing device for aircraft blade cascade-type thrust reverser structure according to claim 3, characterized in that, A sliding block (16) is installed on the inner side of the plug-in block (15), and a sliding groove (17) is provided on the outer side of the mounting bracket (13). The surface of the sliding block (16) is slidably connected to the inner wall of the sliding groove (17).

5. The fatigue strength testing device for aircraft blade-type thrust reverser structures according to claim 1, characterized in that, A rotating ring (18) is installed on the outside of the mounting ring (64), and an anti-slip ring (19) is sleeved on the outside of the rotating ring (18).

6. The fatigue strength testing device for aircraft blade-type thrust reverser structures according to claim 2, characterized in that, A sealing plate (20) is installed at the bottom of the mounting bracket (13), and a sealing groove (21) is provided at the top of the fixing plate (8). The surface of the sealing plate (20) is movably connected to the interior of the sealing groove (21).

7. The fatigue strength testing device for aircraft blade-type thrust reverser structures according to claim 1, characterized in that, The outer side of the slider (73) is fitted with a bellows-style protective cover (22), and the outer side of the bellows-style protective cover (22) is installed with the outer side of the inner wall of the fixing groove (71).

8. The fatigue strength testing device for aircraft blade-type thrust reverser structure according to claim 6, characterized in that, The top of the mounting bracket (13) is equipped with a reinforcing block (23). There are several reinforcing blocks (23), and the several reinforcing blocks (23) are arranged at equal distances. The inner side of the reinforcing block (23) is installed on the outer side of the hydraulic cylinder (5).

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