Rock drill test bed and test method

Abstract

The invention discloses a rock drill test bench and a test method, and belongs to the field of rock drills, the rock drill test bench comprises a test bench, a propulsion beam arranged on the test bench, and a first rock drill to be tested and a second rock drill to be tested which are slidably arranged on the propulsion beam; the test bench is provided with a propelling assembly for driving the tested rock drill I and the tested rock drill II to slide along the propelling beam; the output end of the first rock drill to be tested and the output end of the second rock drill to be tested are oppositely arranged and connected through a connecting sleeve, and the test bench is provided with an unbalance loading device used for applying unbalance loading torque to the connecting sleeve. The method has the advantage of improving the efficiency of the rock drill test debugging process.

Description

Technical Field

[0001] The invention relates to the field of rock drills, in particular to a rock drill test bench and a test method. Background Art

[0002] Hydraulic rock drill is a tool used to directly mine stone. It drills holes in the rock layer so that explosives can be placed to blast the rock, thereby completing the mining of stone or other stone projects. In addition, the rock drill can also be used as a destroyer to break hard layers such as concrete. The rock drill plays an important role in the development of the national economy. It is an essential equipment for rock drilling, blasting and drilling in mining, transportation, hydropower, national defense construction and other projects. Its performance parameters have a very obvious impact on the construction effect, especially the impact energy, which directly determines the construction efficiency.

[0003] Due to the harsh on-site environmental conditions such as mines and tunnels, it is difficult to conduct factory inspections of hydraulic rock drills on site, and simulation tests can only be carried out as much as possible according to on-site working conditions. In order to test the performance of the rock drill, it is generally debugged on a test platform. During the test and debugging of the rock drill, it is necessary to simulate the drilling conditions. Usually, the rock drill + auxiliary test device solution is adopted, and the hydraulic vibration absorption cylinder is used to buffer and absorb energy. However, due to the huge impact energy generated during the operation of the rock drill, it is easy to cause the reducer and hydraulic cylinder to fail. The service life of the reducer and hydraulic cylinder is not long, and they need to be replaced frequently, which increases the economic cost and time cost. Summary of the invention

[0004] The invention provides a rock drill test bench and a test method to solve the technical problems of low efficiency and high cost in the rock drill test and debugging process.

[0005] According to one aspect of the present invention, there is provided a rock drill test bench, comprising a test bench, a propulsion beam arranged on the test bench, and a first rock drill to be tested and a second rock drill to be tested slidably arranged on the propulsion beam, wherein the test bench is provided with a propulsion assembly for driving the first rock drill to be tested and the second rock drill to be tested to slide along the propulsion beam; the output ends of the first rock drill to be tested and the second rock drill to be tested are arranged relatively to each other and are connected by a connecting sleeve, and the test bench is provided with an eccentric load device for applying an eccentric load moment to the connecting sleeve.

[0006] Optionally, the propulsion assembly includes a guide rail arranged on the propulsion beam, two sliders are slidably connected to the guide rail, and both sliders are detachably connected with rock drill mounting trays, and the tested rock drill 1 and the tested rock drill 2 are respectively installed in the corresponding rock drill mounting trays, and the propulsion beam is also provided with a propulsion cylinder parallel to the guide rail, one end of the propulsion cylinder is fixedly connected to the propulsion beam, and the other end is fixedly connected to the slider.

[0007] Optionally, the off-load device includes a mounting seat and a loading shaft passing through the mounting seat, the loading shaft is perpendicular to the connecting sleeve and abuts against the outer wall of the connecting sleeve to provide an off-load torque, and the loading shaft is threadedly connected with adjustment nuts on both sides of the mounting seat.

[0008] Optionally, a bull's eye bearing is provided at one end of the loading shaft that contacts the connecting sleeve.

[0009] According to another aspect of the present invention, there is also provided a rock drill testing method, which comprises the following steps:

[0010] Install two rock drills under test on corresponding installation trays; push the rock drills under test to move by means of a propulsion assembly so that the output ends of the two rock drills under test are close to each other, and connect the output ends of the two rock drills under test using a connecting sleeve; perform performance tests and collect test data, the performance tests include impact performance tests and eccentric load performance tests; the impact performance test includes the following steps: control the first rock drill under test to perform an impact test, and the second rock drill under test to perform buffering and energy absorption; control the second rock drill under test to perform an impact test, and the first rock drill under test to perform buffering and energy absorption; the eccentric load performance test includes the following steps: apply an eccentric torque through an eccentric load device to simulate the eccentric load resistance generated by the rock during the rock drilling process.

[0011] Optionally, the eccentric torque is applied by the eccentric load device by rotating the adjusting nut, adjusting the length of the loading shaft near one end of the connecting sleeve by threaded fitting, and thereby adjusting the force exerted by the loading shaft on the connecting sleeve.

[0012] Optionally, the test data in the impact performance test is collected by adjusting the impact pump outlet pressure and loading it according to a set value at a quantitative oil temperature, and measuring the impact oil circuit inlet pressure fluctuation and converting it into a time domain spectrum as the impact frequency.

[0013] Optionally, the test data in the eccentric load performance test is collected by changing the eccentric load moment to obtain and record the pressure and flow fluctuation of the rock drill.

[0014] Optionally, when it is necessary to test rock drills of different specifications, the mounting tray is removed from the slide block and replaced with a mounting tray that matches the rock drill to be tested.

[0015] In summary, the present application includes at least one of the following beneficial technical effects:

[0016] 1. Use two rock drills to perform a dual-machine mutual attack test. Two rock drills can be tested simultaneously in one test, which has higher test efficiency;

[0017] 2. The traditional gear reduction mechanism + hydraulic buffer energy absorber auxiliary test device buffer energy absorption method is cancelled. Since the rock drill generates huge impact energy during operation, it is easy to cause the failure of the reducer and hydraulic cylinder. This solution directly and independently controls the two rock drills for impact and buffering. The impact energy of the rock drill is absorbed by the buffer structure of the rock drill on the opposite side, and the service life is longer.

[0018] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 It is a structural schematic diagram of the rock drill test bench of the present invention;

[0021] Figure 2 A top view of the rock drill test bench of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the propulsion assembly of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the eccentric load device of the present invention;

[0024] Figure 5 It is a flow chart of the rock drill testing method of the present invention.

[0025] Legend:

[0026] 1. Test bench; 2. Propulsion beam; 3. Tested rock drill 1; 4. Tested rock drill 2; 5. Offset load device; 51. Loading shaft; 52. Adjustment nut; 6. Connecting sleeve; 7. Propulsion cylinder; 8. Mounting tray; 9. Slider; 10. Guide rail. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0028] The following is combined with Figure 1-5 This application is described in further detail.

[0029] The embodiments of the present application disclose a rock drill test bench and a test method.

[0030] Reference Figure 1The rock drill test bench includes a test bench 1, a propulsion beam 2 arranged on the test bench 1, and a rock drill 3 and a rock drill 4 to be tested which are slidably arranged on the propulsion beam 2. The test bench 1 is provided with a propulsion assembly for driving the rock drill 3 and the rock drill 4 to be tested to slide along the propulsion beam 2; the output ends of the rock drill 3 and the rock drill 4 to be tested are relatively arranged and connected through a connecting sleeve 6, and the test bench 1 is provided with an eccentric load device 5 for applying an eccentric load torque to the connecting sleeve 6. The two rock drills are allowed to directly hit each other through the connecting sleeve 6 under the condition of relative arrangement, thereby simulating the interaction and the transmission of impact energy in actual working conditions. Such an arrangement can simultaneously detect the impact and buffering performance of the two machines within one test cycle, greatly improving the test efficiency. Secondly, the propulsion assembly on the test bench 1 can drive the rock drill to be tested to slide along the propulsion beam 2, so that the rock drill can simulate real working actions such as advancement and retreat during the test, which increases the authenticity of the test. Finally, the eccentric load device 5 can apply an eccentric load moment to the connecting sleeve 6 to simulate the asymmetric load that may be generated by the rock during the actual rock drilling process. This helps to evaluate the stability and performance of the rock drill under complex stress conditions and ensure the adaptability and durability of the rock drill design.

[0031] Reference Figure 2 and Figure 3 The propulsion assembly includes a guide rail 10 arranged on the propulsion beam 2, and two sliders 9 are slidably connected to the guide rail 10. The two sliders 9 are detachably connected to the rock drill installation tray 8. The tested rock drill 1 3 and the tested rock drill 2 4 are respectively installed in the corresponding rock drill installation tray 8. The propulsion beam 2 is also provided with a propulsion cylinder 7 parallel to the guide rail 10. One end of the propulsion cylinder 7 is fixedly connected to the propulsion beam 2, and the other end is fixedly connected to the slider 9. The guide rail 10 is installed on the propulsion beam 2 to provide a stable sliding path. The two sliders 9 are connected to the guide rail 10 and can slide back and forth. Each slider 9 is detachably connected to the rock drill installation tray 8. This design allows the rock drill to be quickly loaded and unloaded and adapt to different models of machines. The tested rock drills are respectively installed on these trays. The thrust cylinder 7 is fixedly connected to the thrust beam 2 and is fixedly connected to the slider 9 through the other end. The slider 9 is driven to move along the guide rail 10 by hydraulic pressure, thereby controlling the precise position and moving speed of the rock drill under test. Such a setting enhances the controllability and reproducibility of the test and ensures the accuracy and consistency of the test results.

[0032] Reference Figure 4The eccentric load device 5 includes a mounting seat and a loading shaft 51 passing through the mounting seat. The loading shaft 51 is perpendicular to the connecting sleeve 6 and abuts against the outer wall of the connecting sleeve 6 to provide an eccentric load torque. The loading shaft 51 is threadedly connected with an adjusting nut 52 on both sides of the mounting seat. The main function of the eccentric load device 5 is to apply an eccentric torque to the connecting sleeve 6 to simulate the non-center load caused by the unevenness of the rock or the deviation of the machine operation in the actual rock drilling operation. This eccentric load simulation is crucial for testing the performance of the rock drill under complex and non-ideal conditions, and helps to evaluate the durability and stability of the machine in extreme situations that may be encountered in actual use. The specific connection method is as follows: the eccentric load device 5 includes a mounting seat, and the loading shaft 51 is passed through the mounting seat. The loading shaft 51 is perpendicular to the connecting sleeve 6 and directly abuts against the outer wall of the connecting sleeve 6. Through this arrangement of the loading shaft 51, a lateral or eccentric force can be directly applied to the connecting sleeve 6, thereby simulating an eccentric load. Adjustment nuts 52 are respectively connected to both sides of the mounting seat on the loading shaft 51 through threads, and these nuts can adjust the position of the loading shaft 51 or the pressure applied, so as to accurately control the magnitude and direction of the eccentric load torque applied to the connecting sleeve 6. By rotating the adjustment nut 52, the pressure on the connecting sleeve 6 can be increased or decreased, thereby changing the test conditions to make it closer to the complexity of the actual working environment.

[0033] A bull's eye bearing is provided at one end of the loading shaft 51 that contacts the connecting sleeve 6. The main function of the bull's eye bearing is to reduce friction and improve the contact efficiency between the connecting sleeve 6 and the loading shaft 51, while ensuring that the applied eccentric load torque can be transmitted smoothly and accurately. The bull's eye bearing can allow the loading shaft 51 to remain stable when the torque is applied, avoiding wear or damage caused by direct metal contact, thereby improving the durability of the entire system and the reliability of the test.

[0034] Reference Figure 5 , a rock drill test method, comprising the following steps:

[0035] S100, installing the two rock drills to be tested on the corresponding installation trays 8; hoisting the two rock drills to be tested on the installation trays 8, fixing and installing them, tightening them with an electric wrench, and connecting the hydraulic pipelines to the quick-insert valve block of the test bench.

[0036] S200, pushing the tested rock drills to move by the propulsion assembly, so that the output ends of the two tested rock drills are close to each other, and connecting the output ends of the two tested rock drills by using the connecting sleeve 6;

[0037] S300, perform performance tests and collect test data. The performance tests include impact performance tests and eccentric load performance tests.

[0038] S310, the impact performance test includes the following steps: controlling the tested rock drill 1 3 to perform an impact test, and the tested rock drill 2 4 to perform buffering and energy absorption; controlling the tested rock drill 2 4 to perform an impact test, and the tested rock drill 1 3 to perform buffering and energy absorption; through this two-way testing method, it can be ensured that each rock drill is evaluated for its ability as an impact generator and impact receiver. Such a comprehensive evaluation helps to confirm that each machine can not only effectively perform impact tasks, but also withstand impacts from other machines or environmental factors, ensuring its reliability and effectiveness under all expected working conditions.

[0039] S320, the eccentric load performance test includes the following steps: applying an eccentric torque through the eccentric load device 5 to simulate the eccentric load resistance generated by the rock during the rock drilling process. In actual rock drilling operations, the rock drill often needs to work under various eccentric load conditions, which may affect the mechanical structure and operating efficiency of the machine. By applying the eccentric torque, the stability, durability and capacity of the rock drill under these conditions can be evaluated to ensure that the machine can operate efficiently and stably in various environments.

[0040] The eccentric torque is applied by the eccentric loading device 5 by rotating the adjusting nut 52, adjusting the length of the loading shaft 51 located near the end of the connecting sleeve 6 by threaded fit, and then adjusting the force exerted by the loading shaft 51 on the connecting sleeve 6. Determine the initial position of the loading shaft 51 and use a tool, such as a wrench or an electric driver, to rotate the adjusting nut 52. These nuts are located on both sides of the loading shaft 51 and are connected to the loading shaft 51 by threaded fit. By rotating the nuts, the protruding length of the loading shaft 51 at the end of the connecting sleeve 6 can be adjusted, thereby accurately controlling the torque exerted by the loading shaft 51 on the connecting sleeve 6. Once adjusted to the predetermined position, the loading shaft 51 applies the calculated eccentric torque to the connecting sleeve 6, simulating the unbalanced load caused by uneven distribution of rock or operational errors during rock drilling.

[0041] The test data collection method in the impact performance test is to adjust the outlet pressure of the impact pump at a fixed oil temperature and load it according to the set value, and measure the pressure fluctuation at the inlet of the impact oil circuit and convert it into a time domain spectrum as the impact frequency. The test data collection method in the eccentric load performance test is to obtain and record the pressure and flow fluctuation of the rock drill by changing the eccentric load torque. In the impact performance test, by adjusting the outlet pressure of the impact pump at a fixed oil temperature and measuring the pressure fluctuation at the inlet of the impact oil circuit, and converting it into a time domain spectrum, this method not only ensures the consistency of the test conditions and improves the repeatability of the experimental results, but also can intuitively show the dynamic response of the rock drill when it is impacted. In addition, converting the pressure fluctuation into a time domain spectrum can analyze the frequency composition of the machine response in detail, which helps to identify possible resonant frequencies and other potential problems, so as to make targeted design improvements. In the eccentric load performance test, the eccentric load torque is changed to simulate the non-uniform load in the actual working conditions. This test method is closer to the actual application environment, so it can more accurately predict the performance of the machine on site. Recording the pressure and flow fluctuations of the rock drill when it is subjected to eccentric load, these data help analyze the operating efficiency and mechanical strength of the machine under eccentric load conditions. The data collected can be used to identify possible weaknesses in the design, such as unwanted mechanical stress caused by off-center loading, allowing designers to adjust the design to improve overall mechanical strength and efficiency.

[0042] When it is necessary to test a rock drill of a different specification, the mounting tray 8 is removed from the slide block 9 and replaced with a mounting tray 8 that matches the rock drill to be tested. This design allows the test platform to adapt to a variety of rock drills of different models and sizes, thereby increasing the flexibility of the test facility. Regardless of how the size or design of the rock drill changes, the test bench can be adjusted to accommodate these changes, ensuring that new or customized models can be tested. Using a mounting tray 8 designed specifically for a specific rock drill ensures that the rock drill is stably fixed during the test. This helps to reduce test deviations caused by improper installation and ensures the accuracy and repeatability of test data.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Rock drill test bench, characterized by: The invention comprises a test bench (1), a propulsion beam (2) arranged on the test bench (1), and a first rock drill (3) and a second rock drill (4) to be tested which are slidably arranged on the propulsion beam (2); the test bench (1) is provided with a propulsion assembly for driving the first rock drill (3) and the second rock drill (4) to be tested to slide along the propulsion beam (2); The output ends of the first rock drill (3) and the second rock drill (4) under test are arranged relative to each other and connected via a connecting sleeve (6); and an eccentric load device (5) for applying an eccentric load moment to the connecting sleeve (6) is provided on the test bench (1).

2. The rock drill test bench according to claim 1, characterized in that: The propulsion assembly comprises a guide rail (10) arranged on a propulsion beam (2), two sliders (9) are slidably connected to the guide rail (10), and both sliders (9) are detachably connected to rock drill installation trays (8), and the first rock drill (3) and the second rock drill (4) to be tested are respectively installed in the corresponding rock drill installation trays (8), and the propulsion beam (2) is also provided with a propulsion cylinder (7) parallel to the guide rail (10), one end of the propulsion cylinder (7) is fixedly connected to the propulsion beam (2), and the other end is fixedly connected to the slider (9).

3. The rock drill test bench according to claim 2, characterized in that: The off-center load device (5) comprises a mounting seat and a loading shaft (51) passing through the mounting seat. The loading shaft (51) is perpendicular to the connecting sleeve (6) and abuts against the outer wall of the connecting sleeve (6) to provide an off-center load moment. Adjustment nuts (52) are respectively threadedly connected to the loading shaft (51) on both sides of the mounting seat.

4. The rock drill test bench according to claim 3, characterized in that: One end of the loading shaft (51) that contacts the connecting sleeve (6) is provided with a bull's eye bearing.

5. A rock drill testing method, using the rock drill test bench according to any one of claims 1 to 4, characterized in that: The steps include: Mounting two rock drills to be tested on corresponding mounting trays (8); The rock drills to be tested are pushed to move by the propulsion assembly so that the output ends of the two rock drills to be tested are brought close to each other, and the output ends of the two rock drills to be tested are connected by a connecting sleeve (6); Conduct performance tests and collect test data. Performance tests include impact performance tests and eccentric load performance tests. The impact performance test comprises the following steps: controlling the first rock drill (3) to be tested to perform an impact test, and the second rock drill (4) to be tested to perform buffering and energy absorption; controlling the second rock drill (4) to be tested to perform an impact test, and the first rock drill (3) to be tested to perform buffering and energy absorption; the eccentric load performance test comprises the following steps: applying an eccentric torque through an eccentric load device (5) to simulate the eccentric load resistance generated by the rock during the rock drilling process.

6. The rock drill test bench and test method according to claim 5, characterized in that: The eccentric torque is applied by the eccentric load device (5) by rotating the adjusting nut (52) and adjusting the length of the loading shaft (51) located near one end of the connecting sleeve (6) through threaded matching, thereby adjusting the force exerted by the loading shaft (51) on the connecting sleeve (6).

7. The rock drill test bench and test method according to claim 6, characterized in that: The test data in the impact performance test is collected by adjusting the outlet pressure of the impact pump and loading it according to the set value at a quantitative oil temperature, and measuring the pressure fluctuation at the inlet of the impact oil circuit and converting it into a time domain spectrum as the impact frequency.

8. The rock drill test bench and test method according to claim 7, characterized in that: The test data collection method in the eccentric load performance test is to obtain and record the pressure and flow fluctuations of the rock drill by changing the eccentric load moment.

9. The rock drill test bench and test method according to claim 5, characterized in that: When it is necessary to test rock drills of different specifications, the mounting tray (8) is removed from the slide block (9) and replaced with a mounting tray (8) matching the rock drill to be tested.

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