A testing device and method for bending friction fatigue of deep-sea exploration steel wire ropes

Abstract

This invention relates to the field of wire rope testing technology, specifically to a device and method for testing the bending, friction, and fatigue of deep-sea exploration wire ropes. A steering wheel is located at the upper end of the gap between the long tire and the inner rail, and the wire rope extends smoothly along the arc-shaped outer wall of the steering wheel. The testing chamber is filled with seawater at a level no higher than the lower end of the crossbeam. Grooves with an outer diameter larger than the wire rope are provided on both the long tire and the inner rail. These grooves contain a simulated coral rock layer or a rubber water hose. The beneficial effects are: by setting up the testing chamber to simulate the working state of seawater immersion, by using the adjustable-height long tire to simulate the water pressure compression on the wire rope, by simulating friction through contact between the wire rope and the coral rock, and by reciprocating traction of the wire rope, the bending and friction tests of the wire rope in a deep-sea environment are simulated, improving the accuracy of the simulation test and ensuring the safety of the wire rope in use.

Description

Technical Field

[0001] This invention relates to the field of wire rope testing technology, specifically to a device and method for testing the bending friction fatigue of deep-sea exploration wire ropes. Background Technology

[0002] Wire rope consists of steel wires, a core, and lubricant. It is made by first twisting multiple layers of steel wires into strands, then winding a certain number of strands into a spiral shape around the core. In material handling machinery, it is used for lifting, traction, tensioning, and load bearing. Wire ropes are characterized by high strength, light weight, smooth operation, and resistance to sudden breakage, ensuring reliable performance.

[0003] In the existing technology, wire rope fatigue testing machines are usually used to test the performance of wire ropes. However, the existing tests only simulate the bending fatigue performance of wire ropes under normal conditions, which cannot meet the requirements of wire rope use in deep-sea environments, and cannot test the friction performance of wire ropes.

[0004] The simulation of steel wire ropes in the deep-sea environment needs to simulate factors such as seawater submersion, water pressure compression, and friction between underwater coral rocks. Therefore, existing testing machines cannot meet the performance testing requirements of steel wire ropes for deep-sea exploration. Summary of the Invention

[0005] The purpose of this invention is to provide a device and method for testing the bending friction fatigue of steel wire ropes used in deep-sea exploration, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A testing device for bending friction fatigue of deep-sea exploration steel wire ropes includes a testing box. A crossbeam is horizontally arranged at the upper end of the testing box, and an upper frame is mounted on the crossbeam. A side frame is provided on one side of the testing box, elastically connecting one end of the steel wire rope. A drive assembly for reciprocating traction of the other end of the steel wire rope is mounted on the upper frame. A pair of inner rails are symmetrically arranged on the lower inner wall of the testing box. A steering wheel, fixedly mounted by a mounting frame, is vertically arranged at the lower middle of the crossbeam. An image acquisition device is mounted on the mounting frame, facing the upper arc-shaped outer wall of the steering wheel. The crossbeam is located at the steering wheel... The wheel is symmetrically equipped with long pulleys on both sides, which can be adjusted in height by adjusting components. The lower end of the long pulley is directly opposite the inner rail. The middle section of the steel wire rope extends into the interior of the detection box and extends through the gap between the long pulley and the inner rail. The steering wheel is located at the upper end of the gap between the long pulley and the inner rail, and the steel wire rope extends smoothly along the arc outer wall of the steering wheel. The detection box is filled with seawater with a liquid level not higher than the lower end of the crossbeam. Both the long pulley and the inner rail are provided with grooves with an outer diameter larger than the steel wire rope. Coral rock simulation layer or rubber water belt is provided in the grooves.

[0008] Preferably, the wire rope reciprocates on the testing box via a pulley assembly. Both ends of the wire rope are fixedly bound to the end clamping assembly. A first spring is sleeved on the end of the wire rope near the side frame. The first spring is pressed between the end clamping assembly and the side frame. The pulley assembly includes first guide wheels located on both sides of the upper port of the testing box, a pair of fourth guide wheels located opposite the inner rail, a third guide wheel located on the outer wall of the testing box away from the side frame, and a second guide wheel located on the upper frame. The middle section of the wire rope smoothly enters and extends out of the inner cavity of the testing box through a pair of symmetrically distributed first guide wheels. The wire rope extends parallel to the gap between the long tire and the inner rail through a pair of fourth guide wheels. The wire rope extends to the drive assembly through the second and third guide wheels.

[0009] Preferably, the drive assembly includes a rotating arm, a swing arm, and a turntable. A connecting rod is provided on the upper frame. One end of the rotating arm is provided with a collar that is rotatably sleeved on the connecting rod. The other end of the rotating arm is provided with a retaining ring that is connected to the end of a wire rope. An ear seat is provided at the lower end of the rotating arm near the retaining ring. The upper end of the swing arm is rotatably mounted on the ear seat. A turntable driven by a motor is provided on the upper frame. A sleeve post is vertically provided on the front end face of the turntable. The lower end of the swing arm is sleeved on the sleeve post.

[0010] Preferably, the end clamping assembly includes a pair of symmetrically distributed semi-cylindrical clamping plates, the end of the wire rope is clamped between the pair of semi-cylindrical clamping plates, the pair of semi-cylindrical clamping plates are fastened together by bolts, and the upper end of the end clamping assembly is provided with a threaded tube that engages with the retaining ring, and a locking nut that is pressed onto the retaining ring is threaded on the threaded tube.

[0011] Preferably, the adjusting assembly includes a three-channel inner cavity, an upper piston rod, and a lower piston rod. The long pulley is mounted on the outer frame. A pair of gears are rotatably mounted on the bearings at both ends of the outer frame. The inner side of the long pulley is provided with tooth grooves that mesh with the gears. The lower piston rod is vertically connected to the upper end of the outer frame. A pair of three-channel inner cavities are provided on the crossbeam. The upper piston of the lower piston rod is slidably inserted into the lower end port of the three-channel inner cavity. The upper piston rod is slidably inserted into the upper end port of the three-channel inner cavity. An extension frame corresponding to the upper and lower ports of the three-channel inner cavity is provided on the crossbeam. A retaining ring is fixed on the outer wall of both the upper and lower piston rods. A second spring is sleeved on both the upper and lower piston rods. The second spring is pressed between the retaining ring and the extension frame. The outer diameter of the retaining ring is larger than the inner diameter of the upper and lower ports of the three-channel inner cavity. A pressure gauge connected to the upper piston rod is provided on the extension frame at the upper end of the crossbeam. The middle port of the three-channel inner cavity extends to the crossbeam, and the port is connected to a control valve of an external air pump.

[0012] A method based on the aforementioned deep-sea exploration wire rope bending friction fatigue testing device, the method comprising the following steps:

[0013] First, one end of the wire rope is elastically mounted on the side frame, and the other end of the wire rope is connected to the drive assembly. The middle section of the wire rope extends into the detection box and passes through the gap between the long pulley and the inner rail. Coral rock simulation layer and rubber water belt are placed in the grooves of the long pulley on both sides, and the height of the long pulley is adjusted so that it squeezes downward and presses the wire rope into the inner rail. The drive device pulls the wire rope back and forth, and the image acquisition device collects the status of the wire rope in real time.

[0014] Preferably, when the drive assembly reciprocates to pull one end of the wire rope, the middle section of the wire rope is smoothly bent and moved under the limiting of the pulley assembly, while the other end of the wire rope performs a telescopic movement under the action of the first spring.

[0015] Preferably, when the steel wire rope needs to be reciprocated, the motor drives the turntable to rotate, and one end of the traction arm swings up and down eccentrically with the turntable, synchronously driving the turntable to rotate up and down, thereby causing one end of the traction steel wire rope to move up and down reciprocally.

[0016] Preferably, before the test, the two ends of the wire rope are tied to the end clamping assembly, and the clamping force of the symmetrically distributed semi-cylindrical clamps is used to stably clamp the ends of the wire rope to prevent them from falling off.

[0017] Preferably, the upper and lower piston rods are supported by an extension frame and a second spring. The internal pressure of the three-channel cavity is adjusted by the control valve of an external air pump. Under the action of the internal pressure, the upper and lower piston rods are driven to extend, thereby adjusting the height of the long pulley and controlling the pressure on the wire rope. The interaction between the upper piston rod and the pressure gauge is used to determine the internal pressure value of the three-channel cavity, which facilitates data acquisition.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This invention simulates the working state of seawater immersion by setting up a testing box, uses an adjustable height long pulley to simulate the water pressure compression of the steel wire rope, simulates friction by setting the contact between the steel wire rope and coral rock, and then simulates the bending and friction of the steel wire rope in the deep sea environment by reciprocating traction of the steel wire rope. This improves the accuracy of the simulation test and ensures the safety of the steel wire rope in use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the simulated detection structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the lifting and adjusting installation structure of the upper and lower piston rods of the present invention;

[0022] Figure 3 This is a three-dimensional structural diagram of the drive component of the present invention;

[0023] Figure 4 This is a three-dimensional structural diagram of the connection between the rotating arm and the end clamping assembly of the present invention;

[0024] Figure 5 This is a three-dimensional structural diagram of the connection between the equipment and the swing arm of the present invention;

[0025] Figure 6 This is a schematic diagram of the three-dimensional structure of the rotating arm of the present invention;

[0026] Figure 7 This is a three-dimensional schematic diagram of the long pulley belt mounting structure of the present invention;

[0027] Figure 8 This is a three-dimensional structural diagram of the steering wheel of the present invention.

[0028] In the diagram: 1. Detection box; 2. Upper frame; 3. Side frame; 4. Inner rail; 5. Crossbeam; 6. First guide wheel; 7. Connecting rod; 8. Steel wire rope; 9. Second guide wheel; 10. Third guide wheel; 11. Fourth guide wheel; 12. Long tire; 13. End clamping assembly; 14. First spring; 15. Control valve; 16. Outer frame; 17. Steering wheel; 18. Rotary arm; 19. Swing arm; 20. Snap ring; 21. Turntable; 22. Ear seat; 23. Collar; 24. Sleeve column; 25. Locking nut; 26. Screw tube; 27. Three-channel inner cavity; 28. Extension frame; 29. ​​Lower piston rod; 30. Upper piston rod; 31. Pressure gauge; 32. Second spring; 33. Retaining ring; 34. Image acquisition device; 35. Cable groove; 36. Gear groove; 37. Gear; 38. Mounting bracket. Detailed Implementation

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0030] Please see Figures 1 to 8 The present invention provides a technical solution:

[0031] Example 1: A deep-sea exploration wire rope bending friction fatigue testing device includes a test box 1. A crossbeam 5 is arranged horizontally at the upper end of the test box 1. An upper frame 2 is arranged on the crossbeam 5. A side frame 3 is arranged on one side of the test box 1, which elastically connects one end of a wire rope 8. The wire rope 8 reciprocates on the test box 1 through a pulley assembly. Both ends of the wire rope 8 are fixedly tied to the end clamping assembly 13. A first spring 14 is sleeved on the end of the wire rope 8 near the side frame 3. The first spring 14 is pressed between the end clamping assembly 13 and the side frame 3.

[0032] By setting up the side frame 3 and the end clamping assembly 13, one end of the wire rope 8 is installed on the side frame 3, and with the first spring 14, it is elastically installed, and then under the traction of the drive assembly, the end of the wire rope 8 can be elastically extended and retracted.

[0033] The upper frame 2 is equipped with a drive assembly for the other end of the reciprocating traction steel wire rope 8. The drive assembly includes a rotating arm 18, a swing arm 19, and a turntable 21. The upper frame 2 is equipped with a connecting rod 7. One end of the rotating arm 18 is equipped with a collar 23 that is rotatably sleeved on the connecting rod 7. The other end of the rotating arm 18 is equipped with a retaining ring 20 that is connected to the end of the steel wire rope 8. The lower end of the rotating arm 18 near the retaining ring 20 is equipped with an ear seat 22. The upper end of the swing arm 19 is rotatably mounted on the ear seat 22. The upper frame 2 is equipped with a turntable 21 driven by a motor. The front end face of the turntable 21 is vertically equipped with a sleeve post 24. The lower end of the swing arm 19 is sleeved on the sleeve post 24.

[0034] By setting a motor-driven turntable 21 to drive the swing arm 19 to move up and down, and then drive the swing arm 18 to rotate up and down, the purpose of reciprocating traction of the end of the steel wire rope 8 is achieved.

[0035] A pair of inner rails 4 are symmetrically arranged on the lower inner wall of the test box 1. A crossbeam 5 is located on both sides of the steering wheel 17 and a long pulley belt 12 with height adjustable by an adjustment component is symmetrically arranged. The lower end of the long pulley belt 12 is directly opposite the inner rail 4. The middle section of the wire rope 8 extends into the interior of the test box 1 and extends through the gap between the long pulley belt 12 and the inner rail 4. The steering wheel 17 is located at the upper end of the gap between the long pulley belt 12 and the inner rail 4. The pulley assembly includes a first guide wheel 6 located on both sides of the upper port of the test box 1, a pair of fourth guide wheels 11 located directly opposite the inner rail 4, a third guide wheel 10 located on the outer wall of the test box 1 away from the side frame 3, and a second guide wheel 9 located on the upper frame 2. The middle section of the wire rope 8 smoothly enters and extends out of the inner cavity of the test box 1 through the symmetrically distributed pair of first guide wheels 6. The wire rope 8 extends parallel to the gap between the long pulley belt 12 and the inner rail 4 through the pair of fourth guide wheels 11. The wire rope 8 extends to the drive component through the second guide wheel 9 and the third guide wheel 10.

[0036] The first guide wheel 6 enables the wire rope 8 to smoothly enter and exit the inner cavity of the detection box 1, and the fourth guide wheel 11 enables the wire rope 8 to extend parallel to the gap between the long pulley belt 12 and the inner rail 4.

[0037] A steering wheel 17 is vertically mounted at the lower center of the crossbeam 5 via a mounting bracket 38. An image acquisition device 34 is mounted on the mounting bracket 38, facing the upper arc-shaped outer wall of the steering wheel 17. The steel wire rope 8 extends smoothly along the arc-shaped outer wall of the steering wheel 17.

[0038] By setting the steering wheel 17, it is convenient to acquire images of the wire rope 8, and the state of the wire rope 8 after passing through the long pulleys 12 on both sides can be acquired simultaneously.

[0039] The test chamber 1 is filled with seawater with a liquid level not higher than the lower end of the crossbeam 5. The long pulley belt 12 and the inner rail 4 are both equipped with a groove 35 with an outer diameter larger than that of the steel wire rope 8. The groove 35 is equipped with a coral rock simulation layer or a rubber water belt.

[0040] By setting the groove 35, the extension direction of the wire rope 8 is limited to prevent deviation. The environment of seawater immersion in deep-sea exploration is simulated by filling it with seawater. The water pressure received by the wire rope 8 in the deep-sea environment is applied by the rubber water hose and the long pulley belt 12. The rubber water hose is a hollow water hose made of rubber that is adapted to the contour of the groove 35. The rubber water hose is filled with seawater. The wire rope 8 is squeezed by the cooperation of the coral rock simulation layer and the long pulley belt 12, so that the reciprocating wire rope 8 simulates the state of friction underwater.

[0041] Working principle: Before the test, one end of the steel wire rope 8 is elastically installed on the side frame 3, and the other end of the steel wire rope 8 is connected to the drive assembly. The middle section of the steel wire rope 8 extends into the detection box 1 and passes through the gap between the long pulley belt 12 and the inner rail 4. Coral rock simulation layer and rubber water belt are placed in the groove 35 of the long pulley belt 12 on both sides, and the height of the long pulley belt 12 is adjusted so that it squeezes downward and presses the steel wire rope 8 into the inner rail 4. Seawater is filled to simulate the seawater immersion environment in deep-sea exploration. The water pressure received by the steel wire rope 8 in the deep-sea environment is applied by the rubber water belt and the long pulley belt 12. The rubber water belt is a hollow water belt made of rubber that is adapted to the contour of the groove 35. Seawater is filled in the rubber water belt. The steel wire rope 8 is squeezed by the cooperation of the coral rock simulation layer and the long pulley belt 12, so that the reciprocating steel wire rope 8 simulates the state of friction underwater. The drive device pulls the steel wire rope 8 back and forth, and the image acquisition device 34 collects the state of the steel wire rope 8 in real time and records the detection data.

[0042] Example 2: Based on Example 2, the end clamping assembly 13 includes a pair of symmetrically distributed semi-cylindrical clamping plates. The end of the wire rope 8 is clamped between the pair of semi-cylindrical clamping plates, and the pair of semi-cylindrical clamping plates are fastened together by bolts. The upper end of the end clamping assembly 13 is provided with a screw tube 26 that is fitted with the retaining ring 20. A locking nut 25 that is pressed onto the retaining ring 20 is threaded on the screw tube 26.

[0043] By setting the end clamping component 13, stable support and constraint are achieved for the end of the wire rope 8.

[0044] The adjusting assembly includes a three-channel inner cavity 27, an upper piston rod 30, and a lower piston rod 29. A long pulley belt 12 is mounted on an outer frame 16. A pair of gears 37 are rotatably mounted on bearings at both ends of the outer frame 16. The inner side of the long pulley belt 12 is provided with tooth grooves 36 that mesh with the gears 37. The lower piston rod 29 is vertically connected to the upper end of the outer frame 16. A pair of three-channel inner cavities 27 are provided on the crossbeam 5. The upper piston of the lower piston rod 29 is slidably inserted into the lower end port of the three-channel inner cavity 27. The upper piston rod 30 is slidably inserted into the upper end port of the three-channel inner cavity 27. A pair of three-channel inner cavities 27 are provided on the crossbeam 5. The extension frame 28 corresponding to the upper and lower ports of the three-channel inner cavity 27 has retaining rings 33 fixed on the outer walls of the upper piston rod 30 and the lower piston rod 29. The upper piston rod 30 and the lower piston rod 29 are each fitted with a second spring 32. The second spring 32 is pressed between the retaining ring 33 and the extension frame 28. The outer diameter of the retaining ring 33 is larger than the inner diameter of the upper and lower ports of the three-channel inner cavity 27. A pressure gauge 31 connected to the upper piston rod 30 is installed on the extension frame 28 at the upper end of the crossbeam 5. The middle port of the three-channel inner cavity 27 extends to the crossbeam 5 and the port is connected to the control valve 15 of an external air pump.

[0045] By setting the control valve 15 of the external air pump, the internal pressure of the three-channel inner cavity 27 can be adjusted, thereby driving the upper piston rod 30 and the lower piston rod 29 to squeeze outward. As the lower piston rod 29 extends, the pressure of the long pulley belt 12 on the steel wire rope 8 can be adjusted. By setting the upper piston cross rod 30 to squeeze the pressure gauge 30, the pressure inside the three-channel inner cavity 27 can be reflected, which facilitates data acquisition.

[0046] A method based on a deep-sea exploration wire rope bending friction fatigue testing device, the method comprising the following steps:

[0047] First, one end of the wire rope 8 is elastically mounted on the side frame 3, and the other end of the wire rope 8 is connected to the drive assembly. The middle section of the wire rope 8 extends into the detection box 1 and passes through the gap between the long pulley belt 12 and the inner rail 4. Coral rock simulation layer and rubber water belt are placed in the grooves 35 of the long pulley belts 12 on both sides, and the height of the long pulley belts 12 is adjusted so that they press downward and press the wire rope 8 into the inner rail 4. The drive device reciprocates to pull the wire rope 8, and the image acquisition device 34 collects the status of the wire rope 8 in real time.

[0048] When the drive assembly reciprocates to pull one end of the wire rope 8, the middle section of the wire rope 8 smoothly bends and moves under the limit of the pulley assembly, while the other end of the wire rope 8 performs a telescopic motion under the action of the first spring 14. When it is necessary to reciprocate to pull the wire rope 8, the motor drives the turntable 21 to rotate, thereby pulling one end of the swing arm 19 to swing eccentrically up and down with the turntable 21, synchronously driving the swing arm 18 to rotate up and down, thus pulling one end of the wire rope 8 to move up and down reciprocally. Before the test, both ends of the wire rope 8 are tied to the end clamping assembly 13, utilizing the phase of the symmetrically distributed semi-cylindrical clamps. The mutual clamping force stabilizes the ends of the wire rope 8, preventing it from slipping off. The extension frame 28 and the second spring 32 support the upper piston rod 30 and the lower piston rod 29. The control valve 15 of the external air pump adjusts the internal pressure of the three-channel cavity 27, thereby driving the upper piston rod 30 and the lower piston rod 29 to extend under the action of the internal pressure. This allows for the adjustment of the height of the long pulley belt 12, thus controlling the pressure on the wire rope 8. The interaction between the upper piston rod 30 and the pressure gauge 31 determines the internal pressure value of the three-channel cavity 27, facilitating data acquisition.

[0049] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A deep-sea exploration wire rope bending friction fatigue testing device, comprising a testing box (1), wherein a crossbeam (5) is laterally arranged at the upper end of the testing box (1), an upper frame (2) is arranged on the crossbeam (5), a side frame (3) elastically connecting one end of a wire rope (8) is arranged on one side of the testing box (1), and a drive assembly for the other end of the reciprocating traction wire rope (8) is arranged on the upper frame (2), characterized in that: The lower inner wall of the detection box (1) is symmetrically provided with a pair of inner rails (4). A steering wheel (17) is vertically installed in the middle of the lower end of the crossbeam (5) and fixed by a mounting bracket (38). An image acquisition device (34) is provided on the mounting bracket (38) facing the upper arc outer wall of the steering wheel (17). The crossbeam (5) is symmetrically provided with long tires (12) on both sides of the steering wheel (17) and the height is adjustable by an adjustment component. The lower end of the long tires (12) faces the inner rails (4). The middle section of the wire rope (8) extends to the detection box. Inside the test chamber (1), the steel wire rope (8) extends through the gap between the long wheel belt (12) and the inner rail (4). The steering wheel (17) is located at the upper end of the gap between the long wheel belt (12) and the inner rail (4). The steel wire rope (8) extends smoothly along the arc outer wall of the steering wheel (17). The test chamber (1) is filled with seawater whose liquid level is not higher than the lower end of the crossbeam (5). The long wheel belt (12) and the inner rail (4) are both provided with a groove (35) with an outer diameter larger than the steel wire rope (8). The groove (35) is provided with a coral rock simulation layer or a rubber water belt. The wire rope (8) reciprocates on the test box (1) via a pulley assembly. Both ends of the wire rope (8) are fixedly tied to the end clamping assembly (13). A first spring (14) is sleeved on the end of the wire rope (8) near the side frame (3). The first spring (14) is pressed between the end clamping assembly (13) and the side frame (3). The pulley assembly includes a first guide wheel (6) located on both sides of the upper port of the test box (1), a pair of fourth guide wheels (11) located opposite the inner rail (4), and a... The middle section of the wire rope (8) is smoothly introduced into and extended out of the inner cavity of the test box (1) by a pair of symmetrically distributed first guide wheels (6) on the outer wall of the test box (1) away from the side frame (3) and a second guide wheel (9) on the upper frame (2). The wire rope (8) extends parallel to the gap between the long tire (12) and the inner rail (4) by a pair of fourth guide wheels (11). The wire rope (8) extends to the drive assembly by the second guide wheel (9) and the third guide wheel (10).

2. The deep-sea exploration wire rope bending friction fatigue testing device according to claim 1, characterized in that: The drive assembly includes a rotating arm (18), a swing arm (19), and a turntable (21). A connecting rod (7) is provided on the upper frame (2). One end of the rotating arm (18) is provided with a collar (23) that is rotatably sleeved on the connecting rod (7). The other end of the rotating arm (18) is provided with a retaining ring (20) that is connected to the end of the wire rope (8). An ear seat (22) is provided at the lower end of the rotating arm (18) near the retaining ring (20). The upper end of the swing arm (19) is rotatably mounted on the ear seat (22). A turntable (21) driven by a motor is provided on the upper frame (2). A sleeve post (24) is vertically provided on the front end face of the turntable (21). The lower end of the swing arm (19) is sleeved on the sleeve post (24).

3. The deep-sea exploration wire rope bending friction fatigue testing device according to claim 2, characterized in that: The end clamping assembly (13) includes a pair of symmetrically distributed semi-cylindrical clamps. The end of the wire rope (8) is clamped between the pair of semi-cylindrical clamps. The pair of semi-cylindrical clamps are fastened together by bolts. The upper end of the end clamping assembly (13) is provided with a threaded tube (26) that is fitted with a retaining ring (20). A locking nut (25) that is pressed onto the retaining ring (20) is threaded on the threaded tube (26).

4. The deep-sea exploration wire rope bending friction fatigue testing device according to claim 3, characterized in that: The adjustment assembly includes a three-channel inner cavity (27), an upper piston rod (30), and a lower piston rod (29). The long belt (12) is mounted on the outer frame (16). A pair of gears (37) are rotatably mounted on the bearings at both ends of the outer frame (16). The inner side of the long belt (12) is provided with a tooth groove (36) that meshes with the gears (37). The lower piston rod (29) is vertically connected to the upper end of the outer frame (16). A pair of three-channel inner cavities (27) are provided on the crossbeam (5). The upper piston of the lower piston rod (29) is slidably inserted into the lower end port of the three-channel inner cavity (27). The upper piston rod (30) is slidably inserted into the upper end port of the three-channel inner cavity (27). The crossbeam (5) is provided with... An extension frame (28) is provided corresponding to the upper and lower ports of the three-channel inner cavity (27). A retaining ring (33) is fixed on the outer wall of the upper piston rod (30) and the lower piston rod (29). A second spring (32) is sleeved on the upper piston rod (30) and the lower piston rod (29). The second spring (32) is pressed between the retaining ring (33) and the extension frame (28). The outer diameter of the retaining ring (33) is larger than the inner diameter of the upper and lower ports of the three-channel inner cavity (27). A pressure gauge (31) connected to the upper piston rod (30) is provided on the extension frame (28) at the upper end of the crossbeam (5). The middle port of the three-channel inner cavity (27) extends to the crossbeam (5) and the port is connected to the control valve (15) of an external air pump.

5. A method for implementing the deep-sea exploration wire rope bending friction fatigue testing device according to claim 4, characterized in that: The method includes the following steps: First, one end of the wire rope (8) is elastically installed on the side frame (3), and the other end of the wire rope (8) is connected to the drive assembly. The middle section of the wire rope (8) extends into the detection box (1) and passes through the gap between the long pulley (12) and the inner rail (4). Coral rock simulation layer and rubber water belt are placed in the groove (35) of the long pulley (12) on both sides, and the height of the long pulley (12) is adjusted so that it is pressed downward and the wire rope (8) is pressed into the inner rail (4). The drive device pulls the wire rope (8) back and forth, and the image acquisition device (34) collects the status of the wire rope (8) in real time.

6. The method for testing the bending friction fatigue of deep-sea exploration steel wire rope according to claim 5, characterized in that: When the drive assembly reciprocates to pull one end of the wire rope (8), the middle section of the wire rope (8) bends and moves smoothly under the limit of the pulley assembly, and the other end of the wire rope (8) performs extension and retraction under the action of the first spring (14).

7. The method for testing the bending friction fatigue of deep-sea exploration steel wire rope according to claim 5, characterized in that: When it is necessary to reciprocate the traction of the wire rope (8), the motor drives the turntable (21) to rotate, thereby causing one end of the traction arm (19) to swing eccentrically up and down with the turntable (21), and synchronously driving the turntable (18) to rotate up and down, thus causing one end of the traction wire rope (8) to move up and down reciprocally.

8. The method for testing the bending friction fatigue of deep-sea exploration steel wire rope according to claim 5, characterized in that: Before the test, the two ends of the wire rope (8) were tied to the end clamping assembly (13). The clamping force of the symmetrically distributed semi-cylindrical clamps was used to stably clamp the ends of the wire rope (8) to prevent it from falling off.

9. The method for testing the bending friction fatigue of deep-sea exploration steel wire rope according to claim 5, characterized in that: The upper piston rod (30) and lower piston rod (29) are supported by the extension frame (28) and the second spring (32). The internal pressure of the three-channel cavity (27) is adjusted by the control valve (15) of the external air pump. Under the action of the internal pressure, the upper piston rod (30) and lower piston rod (29) are driven to extend their length, thereby adjusting the height of the long pulley (12) and controlling the pressure on the wire rope (8). The internal pressure value of the three-channel cavity (27) is determined by the interaction between the upper piston rod (30) and the pressure gauge (31), which facilitates data acquisition.

Images