Experimental platform suitable for full performance test of hydraulic rock drill

Abstract

The utility model discloses an experimental platform suitable for the full performance test of a hydraulic rock drill, and the platform comprises a hydraulic rock drill rotation performance testing device which is used for measuring the rotation speed of a hydraulic motor of the hydraulic rock drill under different oil supply flows and different torques; the hydraulic rock drill impact strength testing device is used for measuring the impact strength of the hydraulic rock drill under different impact flows; the hydraulic rock drill durability testing device is used for verifying the stability of the overall impact performance of the hydraulic rock drill under the condition that the hydraulic rock drill is subjected to full-load power impact. According to the utility model, the impact strength, the rotation performance and the durability of the hydraulic rock drill can be tested on one experiment platform, the use and the operation are simple and convenient, the cost is low, and the test efficiency is high for different types of hydraulic rock drills. And only the hydraulic rock drill impact support frame and the hydraulic rock drill rotation support frame which are matched need to be replaced.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic rock drill testing, specifically an experimental platform suitable for full performance testing of hydraulic rock drills. Background Technology

[0002] Hydraulic rock drills are highly technical machines characterized by high-speed impact and high-torque rotation. Powered by high-pressure fluid, they output significantly more energy than traditional pneumatic rock drills. Their impact mechanism is a valve-controlled hydraulic follow-up mechanism, delivering high impact energy. Hydraulic rock drills are among the most precise pieces of mining machinery, making them challenging to manufacture and use.

[0003] Conducting experimental research on various performance indicators of hydraulic rock drills and establishing objective evaluation standards for their impact, rotation, and durability performance is beneficial for ensuring product quality and promoting the continuous development of hydraulic rock drilling technology. It also provides a basis for structural improvements to hydraulic rock drills, determining a reasonable structure, and enabling the debugging and evaluation of the overall machine's performance. Furthermore, it can further improve the stability of hydraulic rock drill performance and user satisfaction. Therefore, it is essential to research an experimental platform capable of meeting the performance testing requirements of hydraulic rock drills. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] The purpose of this invention is to establish a comprehensive testing platform for the impact, rotation, and durability performance of hydraulic rock drills, to establish objective evaluation standards for these performance characteristics, to provide a basis for structural improvements to hydraulic rock drills, to enhance the stability of hydraulic rock drill performance, to further extend the service life of hydraulic rock drills, and to improve user satisfaction.

[0006] 2. Technical Solution

[0007] An experimental platform suitable for full performance test of hydraulic rock drill, characterized in that the experimental platform comprises a hydraulic rock drill rotation performance test device, a hydraulic rock drill impact strength test device and a hydraulic rock drill endurance test device; the hydraulic rock drill rotation performance test device is fixed on one side of a cast iron platform, used for accurately measuring the rotation speed and rotation power of the hydraulic motor of the hydraulic rock drill under different oil supply flow rates and different rotation torques; the hydraulic rock drill impact strength test device is fixed on the other side of the cast iron platform, used for accurately measuring the impact strength of the hydraulic rock drill under different impact oil supply flow rates; the hydraulic rock drill endurance test device is fixed on the same side of the cast iron platform as the hydraulic rock drill impact strength test device, used for verifying the stability of the overall impact performance of the hydraulic rock drill under long-time full-load power impact and establishing objective evaluation criteria for the service life of internal components of the hydraulic rock drill under long-time impact.

[0008] Preferably, the hydraulic rock drill rotation performance test device comprises a hydraulic rock drill rotation support frame, a second flange, a cross universal coupling, a first flange, a same-stage speed reducer, a second elastic coupling, a torque and speed sensor, a torque and speed sensor support, a first elastic coupling, a magnetic powder brake and a magnetic powder brake support.

[0009] Preferably, the hydraulic rock drill impact strength test device and the hydraulic rock drill endurance test device share a set of propulsion devices, which are composed of a steel rail 24kg / m, a steel wire rope, a screw rod, a first M27 fixed bolt, a nut, a steel wire traction, a hook ring, a sliding block, a hydraulic rock drill impact support frame, a front supporting plate, a rear supporting plate, a front baffle, a pulley and a second M27 fixed bolt.

[0010] Preferably, the hydraulic rock drill impact strength test device comprises a steel ball energy absorber / magnetic powder energy absorber, an energy absorber support left, an energy absorber support right, a drill rod and a propulsion device. The coaxial error between the drill rod and the drill bit of the hydraulic rock drill is less than 0.5mm. The front baffle is provided with a through slot to ensure the normal passage of the hydraulic pipe of the hydraulic cylinder, and the through slot is wrapped with a plastic ring to prevent the hydraulic pipe from being worn. Two installation grooves with diameters suitable for the energy absorber support left and the energy absorber support right are formed on the outer wall of the steel ball energy absorber / magnetic powder brake. The displacement of the hydraulic cylinder can meet the requirements of the hydraulic rock drill endurance test device and the hydraulic rock drill impact strength test device. The propulsion force Fn provided by the hydraulic cylinder is greater than or equal to 4000N.

[0011] Preferably, the hydraulic rock drill endurance test device comprises a threaded connection sleeve, a hydraulic energy absorber, a hydraulic energy absorber base, a guide sleeve and a propulsion device.

[0012] Preferably, the drill pipe, the hydraulic energy absorber valve core and the center of the hydraulic rock drill drill bit are at the same height, the coaxial error is less than 0.8mm, and after the impact strength test of the hydraulic rock drill is completed, only the steel ball energy absorber / magnetic powder energy absorber is pulled out of the drill pipe, the hydraulic energy absorber is installed and fixed on the hydraulic energy absorber base, and then the durability test can be carried out.

[0013] Preferably, the coaxial installation error of the magnetic powder brake, the torque and speed sensor and the center shaft of the same stage reducer is not more than 0.2mm, the gear oil added in the same stage reducer is immersed in the bearing center, the hydraulic rock drill rotary support frame is provided with a back-shaped groove at the bottom, so that the installation position of the hydraulic rock drill is adjusted, and the flange and the inner recessed shaft hole of the cross universal coupling are matched to ensure the concentricity during rotation.

[0014] Preferably, the stress sheet is arranged by using a full bridge method with higher sensitivity.

[0015] Preferably, the test of different models of hydraulic rock drills only needs to replace the hydraulic rock drill impact support frame and the hydraulic rock drill rotary support frame matched with the hydraulic rock drill.

[0016] 3. Beneficial effects

[0017] The utility model discloses not only can complete the test of the impact strength and the rotary performance of the hydraulic rock drill on one experimental platform, but also can complete the test of the durability of the hydraulic rock drill, is easy to operate, needs small, and the cost is low, and simultaneously, for different hydraulic rock drill models, only needs to replace the hydraulic rock drill impact support frame and the hydraulic rock drill rotary support frame matched with the hydraulic rock drill, and the adaptability is strong, and the function is more perfect. ACCURACY

[0018] Figure 1 It is the overhead view of the utility model hydraulic rock drill full performance test experimental platform;

[0019] Figure 2 It is the front view of the utility model hydraulic rock drill full performance test experimental platform;

[0020] Figure 3 It is the overhead view of the utility model hydraulic rock drill full performance test experimental platform test impact strength;

[0021] Figure 4 It is the overhead view of the utility model hydraulic rock drill full performance test experimental platform impact test;

[0022] Figure 5 It is the utility model hydraulic rock drill full performance test experimental platform data acquisition system schematic diagram;

[0023] Explanation of reference numerals in the figure: 1. cast iron platform; 2. hydraulic rock drill rotary support frame; 3. sliding block; 4. steel wire traction; 5. steel rail 24 kg / m; 6. torque and speed sensor support; 7. left energy absorber support; 8. right energy absorber support; 9. force plate; 10. magnetic powder brake; 11. first elastic coupling; 12. torque and speed sensor; 13. second elastic coupling; 14. same-stage speed reducer; 15. first flange; 16. cross universal coupling; 17. second flange; 18. hydraulic rock drill; 19. steel ball energy absorber / magnetic powder energy absorber; 20. drill rod; 21. front support plate; 22. hydraulic rock drill impact support frame; 23. hydraulic rock drill; 24. rear support plate; 25. pulley; 26. hydraulic oil cylinder; 27. front baffle; 28. nut; 29. screw rod; 30. first M27 fixing bolt; 31. hook ring; 32. screw rod; 33. nut; 34. second M27 fixing bolt; 35. tube cooler; 36. hydraulic energy absorber; 37. hydraulic energy absorber base; 38. guide sleeve; 39. threaded connection sleeve; 40. magnetic powder brake support. DETAILED DESCRIPTION

[0024] An experimental platform suitable for full performance test of a hydraulic rock drill, characterized in that the experimental platform comprises a hydraulic rock drill rotary performance test device, a hydraulic rock drill impact strength test device and a hydraulic rock drill endurance test device; the hydraulic rock drill rotary performance test device is fixed on one side of the cast iron platform, and is used for accurately measuring the rotary speed and rotary power of the hydraulic motor of the hydraulic rock drill under different oil supply flow rates and different rotary torques; the hydraulic rock drill impact strength test device is fixed on the other side of the cast iron platform, and is used for accurately measuring the impact strength of the hydraulic rock drill under different impact oil supply flow rates; the hydraulic rock drill endurance test device is fixed on the same side of the cast iron platform as the hydraulic rock drill impact strength test device, and is used for verifying the stability of the overall impact performance of the hydraulic rock drill under the condition of long-time full-load power impact of the hydraulic rock drill, and establishing an objective evaluation standard for the service life of internal components of the hydraulic rock drill under long-time impact.

[0025] REFERENCE Figures 1-4The utility model provides a kind of hydraulic rock drill full performance test experimental platform, including cast iron platform 1 and the hydraulic rock drill rotation performance test device fixed on cast iron platform 1, hydraulic rock drill impact strength test device and hydraulic rock drill impact endurance test device, the hydraulic rock drill rotation performance test device includes, hydraulic rock drill rotation support frame 2, torque speed sensor support 6, magnetic powder brake 1, first elastic coupling 11, torque speed sensor 12, second elastic coupling 13, same stage reducer 14, flange, cross universal coupling 16, second flange 17, magnetic powder brake support 40, the magnetic powder brake support 40 is fixed by bolt on cast iron platform 1, the magnetic powder brake 10 is fixed by bolt on magnetic powder brake support 40, the magnetic powder brake 10 provides torque for hydraulic rock drill rotation performance test, the torque provided by the magnetic powder brake 10 increases with the increase of adjusting current, the magnetic powder brake 10 is connected with torque speed sensor 12 by first elastic coupling 11, torque speed sensor support 6 is fixed by bolt on cast iron platform, torque speed sensor 12 is fixed by bolt on torque speed sensor support 6, torque speed sensor 12 can accurately measure the torque and speed generated by hydraulic rock drill 18 under different rotation oil pressure, and is uploaded to computer by data line, torque speed sensor 12 is connected with same stage reducer 14 by second elastic coupling 13, same stage reducer 14 is fixed on cast iron platform 1 by pressing plate, same stage reducer 14 plays the role of shock absorption and buffering, protects torque speed sensor 12, same stage reducer 14 is connected with hydraulic rock drill 18 by flange, cross universal coupling 16 and second flange 17, hydraulic rock drill rotation support frame 2 is fixed by bolt on cast iron platform 1, hydraulic rock drill 18 is fixed by bolt on hydraulic rock drill rotation support frame 2, the hydraulic rock drill impact strength test device includes steel ball energy absorber / magnetic powder energy absorber 19, drill rod 20, energy absorber support left 7, energy absorber support right 8, stress plate 9 and thrust device, the thrust device includes front support plate 21, hydraulic rock drill impact support frame 22, hydraulic rock drill 23, rear support plate 24, pulley 25, hydraulic oil cylinder 26, front baffle 27, nut 28, screw rod 29, first M27 fixed bolt 30, hook ring 31, screw rod 32, nut 33, second M27 fixed bolt 34, sliding block 3, steel wire traction 4, steel rail 24kg / m 5, stress plate 9 is fixed by bolt on cast iron platform 1, stress plate 9 plays the role of displacement restriction to steel ball energy absorber / magnetic powder energy absorber 19, energy absorber support 7 and energy absorber support right 8 are fixed by bolt on cast iron platform 1, energy absorber support 7 and energy absorber support right 8 play the role of support to steel ball energy absorber / magnetic powder energy absorber 19, steel ball energy absorber / magnetic powder energy absorber 19 converts the impact energy generated by hydraulic rock drill 23 into heat energy, and heat is taken away by cooling water, drill rod 20 plays the role of energy transmission,The impact energy generated by the hydraulic rock drill 23 is transferred to the steel ball energy absorber / magnetic powder energy absorber 19, and the thrust device can drive the hydraulic rock drill 23 to move back and forth. The hydraulic rock drill impact resistance test device comprises a tube cooler 35, a hydraulic energy absorber 36, a hydraulic energy absorber base 37, a guide sleeve 38 and a threaded connection sleeve 39. The tube cooler 35 is fixed on the cast iron platform 1 by bolts, and the tube cooler 35 cools the oil return of the hydraulic energy absorber 36. The hydraulic energy absorber base 37 is fixed on the cast iron platform 1 by bolts, and the hydraulic energy absorber 36 is fixed on the hydraulic energy absorber base 37 by bolts. The hydraulic energy absorber 36 converts the impact energy generated by the hydraulic rock drill 23 into thermal energy of hydraulic oil. The guide sleeve 38 is the main impact surface of the hydraulic rock drill 23. The guide sleeve 39 has a water return port on the side. The threaded connection sleeve 39 protects the drill shank of the hydraulic rock drill 23, avoiding direct impact of the drill shank on the guide sleeve 38. After the hydraulic rock drill impact strength test is completed, only the drill rod 20 needs to be removed, and the hydraulic energy absorber 36, the guide sleeve 38 and the threaded connection sleeve 39 can be installed to complete the hydraulic rock drill impact resistance test. Similarly, after the hydraulic rock drill impact resistance test is completed, only the hydraulic energy absorber 36, the guide sleeve 38 and the threaded connection sleeve 39 need to be removed, and the drill rod 20 can be installed to perform the hydraulic rock drill impact strength test.

[0026] Referring to Figure 5 The stress sheet is attached to both sides of the drill rod 20. During the impact strength test of the hydraulic rock drill 23, the impact energy generated by the hydraulic rock drill 23 is transmitted to the steel ball energy absorber / magnetic powder energy absorber 19 through the drill rod 20. During the transmission of the impact energy, the stress sheet will deform and generate a voltage or current signal. The NR-ST04 will receive the voltage or current signal generated by the stress sheet and be collected by the NR-X100 data collector, transmitted to the computer, and calculated to obtain the specific impact energy. The FD-Q20C flow meter will monitor the flow of hydraulic oil in the hydraulic oil pipe in real time, convert the flow into an electrical signal, and be received by the NR-HA08 high-speed analog quantity measurement module, collected by the NR-X100 data collector, transmitted to the computer, and calculated to obtain the relationship between the hydraulic rock drill impact oil supply flow and the impact energy. The torque and speed sensor 12 can sense the changes of the hydraulic rock drill torque and speed, transmit the corresponding electrical signals to the torque and speed power collector TR-3S, and then transmit the data to the computer for analysis and processing to obtain the rotary speed of the hydraulic rock drill under a certain torque. The hydraulic rock drill measures the rotary oil supply flow under a certain torque by the FD-Q20C flow meter, measures the speed of the hydraulic rock drill by the torque and speed sensor 12, and finally transmits the data to the computer for processing to obtain the relationship between the rotary oil supply flow and the rotary speed of the hydraulic rock drill under a certain torque.

[0027] The test is carried out on different models of hydraulic rock drills, and the full performance test experiment platform of the hydraulic rock drill only needs to replace the rotary support frame 2 and the impact support frame 22 of the hydraulic rock drill.

[0028] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Therefore, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application, which does not deviate from the content of the technical scheme of the present application, shall fall within the scope of protection of the technical scheme of the present application.

Claims

1. An experimental platform suitable for full performance testing of hydraulic rock drills, characterized in that, The experimental platform includes a hydraulic rock drill rotation performance testing device, a hydraulic rock drill impact strength testing device, and a hydraulic rock drill durability testing device. The hydraulic rock drill rotation performance testing device is fixed to one side of the cast iron platform and is used to accurately measure the rotation speed and rotation power of the hydraulic motor of the hydraulic rock drill under different oil supply flow rates and different rotation torques. The hydraulic rock drill impact strength testing device is fixed to the other side of the cast iron platform and is used to accurately measure the magnitude of the impact strength of the hydraulic rock drill under different impact oil supply flow rates. The hydraulic rock drill durability testing device is fixed to the same side of the cast iron platform as the hydraulic rock drill impact strength testing device. It is used to verify the stability of the overall impact performance of the hydraulic rock drill under long-term full-load power impact and to establish an objective evaluation standard for the life of the internal components of the hydraulic rock drill under long-term impact.

2. The experimental platform for full performance testing of hydraulic rock drills according to claim 1, characterized in that: The hydraulic rock drill rotation performance testing device includes a hydraulic rock drill rotation support frame (2), a second flange (17), a cross universal coupling, a first flange (15), a same-stage reducer (14), a second flexible coupling (13), a torque and speed sensor (12), a torque and speed sensor bracket (6), a first flexible coupling (11), a magnetic powder brake (10), and a magnetic powder brake bracket (40).

3. The experimental platform for full performance testing of hydraulic rock drills according to claim 1, characterized in that: The hydraulic rock drill impact strength testing device and the hydraulic rock drill durability testing device share a propulsion device. The propulsion device consists of a 24kg / m steel rail (5), a first M27 fixing bolt (30), a steel wire rope, a screw (32), a nut (33), a steel wire traction (4), a hook ring (31), a slider (3), a hydraulic rock drill impact support frame (22), a front support plate (21), a rear support plate (24), a front baffle (27), a pulley (25), and a second M27 fixing bolt (34).

4. The experimental platform for full performance testing of hydraulic rock drills according to claim 3, characterized in that: The hydraulic rock drill impact strength testing device includes a steel ball energy absorber / magnetic powder energy absorber (19), a left energy absorber bracket (7), a right energy absorber bracket (8), a drill rod (20), and a propulsion device. The coaxiality error between the drill rod (20) and the drill bit of the hydraulic rock drill (23) is less than 0.5 mm. The front baffle (27) has a through groove to ensure that the hydraulic pipe of the hydraulic cylinder (26) can pass through normally. The through groove is wrapped with a plastic ring to prevent wear on the hydraulic pipe. The outer wall of the steel ball energy absorber / magnetic powder energy absorber (19) has two installation grooves that are adapted to the size and diameter of the left (7) and right (8) energy absorber brackets. The displacement of the hydraulic cylinder (26) can meet the requirements of the hydraulic rock drill durability testing device and the hydraulic rock drill impact strength testing device. The propulsion force Fn provided by the hydraulic cylinder (26) is ≥4000N.

5. The experimental platform for full performance testing of hydraulic rock drills according to claim 1, characterized in that: The hydraulic rock drill durability test device consists of a threaded connecting sleeve (39), a hydraulic energy absorber (36), a hydraulic energy absorber base (37), a guide sleeve (38), and a propulsion device.

6. The experimental platform for full performance testing of hydraulic rock drills according to claim 4, characterized in that: The drill rod (20), the valve core of the hydraulic energy absorber (36), and the shank of the hydraulic rock drill (23) are at the same height, and the coaxiality error of the three is less than 0.8mm. After the impact strength test of the hydraulic rock drill is completed, the drill rod (20) only needs to be pulled out and the hydraulic energy absorber (36) can be installed and fixed on the hydraulic energy absorber base (37) to carry out the durability test.

7. The experimental platform for full performance testing of hydraulic rock drills according to claim 2, characterized in that: The coaxiality installation error of the central shaft of the magnetic powder brake (10), torque and speed sensor (12) and the same-level reducer (14) does not exceed 0.2mm. The gear oil added inside the same-level reducer (14) soaks through the center of the gear. The bottom of the hydraulic rock drill rotary support frame (2) has a U-shaped groove to adjust the installation position of the hydraulic rock drill (18). The first flange (15) and the second flange (17) have concave shaft holes that fit with the universal joint (16) to ensure concentricity during rotation.

8. The experimental platform for full performance testing of hydraulic rock drills according to claim 6, characterized in that: Stress plates are attached to both sides of the drill rod (20) and placed perpendicularly to each other. The stress plates are arranged using the full-bridge method, which has higher sensitivity.

9. The experimental platform for full performance testing of hydraulic rock drills according to claim 1, characterized in that: For testing different models of hydraulic rock drills, it is only necessary to replace the hydraulic rock drill impact support frame (22) and hydraulic rock drill rotary support frame (2) that are compatible with the hydraulic rock drill.

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