A coal mining machine simulation cutting test device and test method
By designing a simulated cutting test device for coal mining machines, the cutting teeth are made to intermittently contact and rub against the spherical shell, which solves the problem of inaccurate test results in the existing technology and achieves more accurate life assessment and time savings.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
- Filing Date
- 2022-09-07
- Publication Date
- 2026-06-02
AI Technical Summary
Existing coal mining machine cutting tooth life testing equipment cannot accurately simulate coal seam changes, resulting in inaccurate test results.
Design a coal mining machine simulation cutting test device, which simulates coal seam changes by intermittently contacting and rubbing the cutting teeth with a spherical shell through a rotating device, and combines test methods for different types of cutting teeth.
It improves the accuracy of cutting tool life testing, avoids the impact of excessive temperature on service life, and saves testing time.
Smart Images
Figure CN115791106B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a simulated cutting test device and test method for a coal mining machine, belonging to the field of coal mining machine test equipment. Background Technology
[0002] Coal mining machines are among the most efficient and safest machines in modern coal mining operations. During the mining process, they cut raw coal with cutting teeth and transport it via conveyor belts, saving manpower. In actual operation, the lifespan of the cutting teeth is crucial. Currently, equipment for testing the lifespan of cutting teeth can only simulate a coal seam using a flat plate, causing the cutting teeth to continuously rub against the plate. However, in actual operation, coal seams vary considerably, and the cutting teeth often do not rub continuously against the seam, leading to inaccurate test results. Summary of the Invention
[0003] The purpose of this invention is to solve the above-mentioned problems in the background art by providing a coal mining machine simulation cutting test device and test method.
[0004] The present invention achieves the above objectives by adopting the following technical solution:
[0005] A coal mining machine simulation cutting test device includes a frame and a rotating device; the frame includes a base, and a motor I is fixedly connected to the upper end of the base by a support rod; a turntable I is fixedly connected to the output shaft of the motor I, and multiple cutting teeth are installed on the turntable;
[0006] The rotating device includes a bracket, a rotating shaft, a rotating cylinder, and an extrusion assembly; the bracket is fixedly connected to the upper end of the base, and the rotating shaft is fixedly connected to the top side of the bracket; the rotating cylinder is connected to the rotating shaft via a bearing; the extrusion assembly is disposed inside the rotating cylinder.
[0007] A test method for a coal mining machine simulated cutting test device, the test method comprising the following steps:
[0008] Step 1: Start motor II to move the cutting teeth to a position close to the rotating disk;
[0009] Step 2: Start motor I to drive turntable I to rotate, which in turn drives the cutting teeth to rotate, so that the cutting teeth continuously contact and rub against the spherical shell to test the service life of the cutting teeth.
[0010] Compared with the prior art, the beneficial effects of the present invention are: the present invention drives the rotating disk to rotate through multiple moving devices, so that the cutting teeth can intermittently rub against different moving devices, thereby testing their service life and avoiding the test of the cutting teeth being too hot due to continuous friction between the two, which would affect the service life; at the same time, the present invention can also install different types of cutting teeth on the rotating disk I and test them at the same time, saving time. Attached Figure Description
[0011] Figure 1 This is a front view of a coal mining machine simulation cutting test device according to the present invention;
[0012] Figure 2 This is a front view of the frame of a coal mining machine simulation cutting test device according to the present invention;
[0013] Figure 3 This is a front view of the rotating device of a coal mining machine simulation cutting test apparatus according to the present invention;
[0014] Figure 4 This is a side view of the limiting plate of a coal mining machine simulation cutting test device according to the present invention;
[0015] Figure 5 yes Figure 4 Sectional view along the AA direction;
[0016] Figure 6 This is a schematic diagram of the movable device structure of a coal mining machine simulation cutting test device according to the present invention;
[0017] Figure 7 This is a front view of the rotating disk of a coal mining machine simulation cutting test device according to the present invention;
[0018] Figure 8 This is a schematic diagram of the rotating disk of a coal mining machine simulation cutting test device according to the present invention. Detailed Implementation
[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0020] Specific implementation method one: as follows Figure 1-8 As shown, this embodiment describes a coal mining machine simulation cutting test device, including a frame 1 and a rotating device 2; the frame 1 includes a base 11, and a motor I 16 is fixedly connected to the upper end of the base 11 via a support rod 14; a turntable I 17 is fixedly connected to the output shaft of the motor I 16, and a plurality of cutting teeth 18 are installed on the turntable I 17.
[0021] The rotating device 2 includes a bracket 21, a rotating shaft 22, a rotating cylinder 23, and an extrusion assembly; the bracket 21 is fixedly connected to the upper end of the base 11, and the rotating shaft 22 is fixedly connected to the top side of the bracket 21; the rotating cylinder 23 is connected to the rotating shaft 22 through a bearing; the extrusion assembly is disposed inside the rotating cylinder 23.
[0022] Specific implementation method two: such as Figure 1-8As shown, this embodiment is a further explanation of specific embodiment one. The frame 1 also includes a motor II 15 and a lead screw 13; the upper end of the base 11 is provided with a slide rail 12; the support rod 14 is slidably engaged with the slide rail 12, and the bottom end of the support rod 14 is provided with a transverse threaded hole; one end of the lead screw 13 is connected to the inner wall of the slide rail 12 through a bearing, the lead screw 13 is threadedly connected to the support rod 14 through the threaded hole, and the other end of the lead screw 13 passes through the base 11 and is fixedly connected to the output shaft of the motor II 15; the motor II 15 is fixedly connected to the side of the base 11.
[0023] Specific implementation method three: such as Figure 1-8 As shown, this embodiment is a further explanation of the first specific embodiment. The extrusion kit includes a limiting disc 24, multiple movable devices 25 and a rotating disc 26. The limiting disc 24 is fixedly connected to the rotating shaft 22, and the rotating disc 26 is connected to the inner wall of the rotating cylinder 23 through a bearing. The multiple movable devices 25 are arranged on the rotating disc 26.
[0024] Specific implementation method four: such as Figure 1-8 As shown, this embodiment is a further explanation of the first specific embodiment. The limiting disk 24 includes a disk 241. The disk 241 is connected to the rotating shaft 22 by a bearing. The end of the disk 241 facing the rotating disk 26 is provided with a plurality of annular grooves 243. A plurality of upwardly protruding arc-shaped blocks 242 are fixedly connected inside the annular grooves 243.
[0025] Specific implementation method five: such as Figure 1-8 As shown, this embodiment is a further explanation of specific embodiment one. The rotating disk 26 includes a turntable II 261 and a plurality of rings 262. A corresponding ring 262 is connected to the outer circular surface of the turntable II 261 by a bearing. A corresponding ring 262 is connected to the outer circular surface of each ring 262 by a bearing, and the outermost ring 262 is connected to the inner wall of the rotating cylinder 23 by a bearing. The turntable II 261 and the plurality of rings 262 are provided with through holes 263. The inner wall of each through hole 263 is provided with a groove 264 parallel to the central axis of the through hole 263. A spring I 265 is fixedly connected to the groove 264.
[0026] Specific implementation method six: such as Figure 1-8As shown, this embodiment is a further explanation of specific embodiment one. Each of the movable devices 25 includes a sliding cylinder 251, a slider 252, a spherical shell 253, an inner cylinder 254, a spring II 255, a transmission rod 256, and a limiting rod 258; the sliding cylinder 251 is slidably engaged with the corresponding through hole 263, and the slider 252, which is slidably engaged with the sliding groove 264, is fixedly connected to the side of the sliding cylinder 251; the spring I 265 abuts against the corresponding slider 252; A spherical shell 253 is fixedly connected to one end of the sliding cylinder 251 facing the turntable I17; the inner cylinder 254 is fixedly connected to the inner wall of the sliding cylinder 251, and a spring II 255 is fixedly connected inside the inner cylinder 254, and a transmission rod 256 is fixedly connected to the other end of the spring II 255; a limiting groove 257 is provided on the side of the transmission rod 256; one end of the limiting rod 258 is fixedly connected to the inner wall of the inner cylinder 254, and the other end of the limiting rod 258 slides in cooperation with the limiting groove 257.
[0027] Specific implementation method seven: such as Figure 1-8 As shown, this embodiment is a further explanation of the first specific embodiment, wherein the plurality of cutting teeth 18 are arranged in a ring.
[0028] Specific implementation method eight: such as Figure 1-8 As shown, this embodiment is a further explanation of the first specific embodiment. When the movable device 25 is subjected to the pressure of the cutting tooth 18, the transmission rod 256 moves in the direction of the corresponding annular groove 243 and contacts the arc block 242.
[0029] Specific implementation method nine: as follows Figure 1-8 As shown, this embodiment is a further explanation of the first specific embodiment. The number of arc-shaped blocks 242 in each annular groove 243 is greater than the number of movable devices 25 on the corresponding circular ring 262.
[0030] Specific implementation method ten: such as Figure 1-8 As shown in the figure, this embodiment describes a test method for a coal mining machine simulated cutting test device, the test method including the following steps:
[0031] Step 1: Start motor II 15 to move the cutting tooth 18 to a position close to the rotating disk 26;
[0032] Step 2: Start motor I16 to drive turntable I17 to rotate, which in turn drives the cutting tooth 18 to rotate, so that the cutting tooth 18 continuously contacts and rubs against the spherical shell 253 to test the service life of the cutting tooth.
[0033] The working principle of this invention is as follows: When using this device, motor II 15 is started, causing the cutting tooth 18 to move close to the rotating disk 26, and the tip of the cutting tooth 18 contacts the spherical shell 253, pushing the spherical shell 253 towards the rotating disk 26. The spherical shell 253 drives the cylinder 251 to move, and the cylinder 251 drives the slider 252 to compress the spring I 265. Subsequently, motor I 16 is started, driving the turntable I 17 to rotate, which in turn drives the cutting tooth 18 to rotate. The turntable I 17 is coaxial with the rotating disk 26. When the cutting tooth 18 on the turntable I 17 rotates, the cutting tooth 18 will continuously contact the spherical shell 253 and pass through the spherical shell 253. The outer spherical surface pushes the spherical shell 253, causing the cylinder 251 to move. Because there is a gap between adjacent spherical shells 253 on the same annulus 262, the cutting tooth 18 can detach from the spherical shell 253 during movement, releasing heat from its tip. This prevents the cutting tooth 18 from overheating due to continuous friction, which would affect its performance and lead to incorrect service life tests. When the spherical shell 253 is pushed by the cutting tooth 18, it drives the cylinder 251 to move, which in turn drives the inner shell 254 to move. The inner shell 254 drives the transmission rod 256 towards the limiting plate 24. When the transmission rod 256 contacts the annular groove 243... When the inner arc-shaped block 242 reaches its arc surface, the inner shell 254 continues to move with the cylinder 251, causing the spring II 255 to be continuously compressed. Since the top of the arc-shaped block 242 is an arc surface, when the transmission rod 256 contacts the arc surface of the arc-shaped block 242, the force of the spring II 255 pushes the arc-shaped block 242 to move, thereby driving the disc 241 to rotate. When the transmission rod 256 contacts the arc-shaped block 242, the rotation direction of the turntable II 261 or the ring 262 is the same as that of the turntable I 17, making the distance between the two spherical shells 253 relatively larger, and making the time for the cutting tooth 18 to disengage from the spherical shell 253 longer. When the rotation directions are opposite, the two spherical shells 254... The distance between 53 is relatively reduced (because the cutting teeth 18 on the turntable I17 are arranged in a ring and have the same diameter as the corresponding ring 262, the number of cutting teeth 18 is less than the number of the corresponding ring 262 or the number of the movable devices 25 on the disc 261. The number of cutting teeth 18 should meet the requirement that the cutting teeth 18 on the same circumference do not move to the gap between the two spherical shells 253 at the same time. For example, if the number of movable devices 25 is ten, then the number of cutting teeth 18 is less than ten and cannot be nine or five). This shortens the time for the cutting teeth 18 to detach from the spherical shell 253, thereby making the effect of the rotating device 2 simulating the coal seam more realistic and the service life data of the cutting teeth 18 more accurate.
[0034] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A coal mining machine simulation cutting test device, characterized in that: It includes a frame (1) and a rotating device (2); the frame (1) includes a base (11), and the upper end of the base (11) is fixedly connected to a motor I (16) via a support rod (14); a turntable I (17) is fixedly connected to the output shaft of the motor I (16), and multiple cutting teeth (18) are installed on the turntable I (17); The rotating device (2) includes a bracket (21), a rotating shaft (22), a rotating cylinder (23), and an extrusion assembly; the bracket (21) is fixedly connected to the upper end of the base (11), and the rotating shaft (22) is fixedly connected to the top side of the bracket (21); the rotating cylinder (23) is connected to the rotating shaft (22) through a bearing; the extrusion assembly is disposed inside the rotating cylinder (23); The extrusion assembly includes a limiting disc (24), multiple movable devices (25), and a rotating disc (26); the limiting disc (24) is fixedly connected to the rotating shaft (22), and the rotating disc (26) is connected to the inner wall of the rotating cylinder (23) via bearings; the multiple movable devices (25) are arranged on the rotating disc (26); The limiting disk (24) includes a disk (241); the disk (241) is connected to the rotating shaft (22) by a bearing, and the end of the disk (241) facing the rotating disk (26) is provided with a plurality of annular grooves (243), and a plurality of upwardly protruding arc blocks (242) are fixedly connected inside the annular grooves (243). The rotating disk (26) includes a rotating disk II (261) and multiple rings (262); the outer circular surface of the rotating disk II (261) is connected to a corresponding ring (262) by a bearing; the outer circular surface of each ring (262) is connected to a corresponding ring (262) by a bearing, and the outermost ring (262) is connected to the inner wall of the rotating cylinder (23) by a bearing; the rotating disk II (261) and the multiple rings (262) are provided with through holes (263), and the inner wall of each through hole (263) is provided with a groove (264) parallel to the central axis of the through hole (263), and a spring I (265) is fixedly connected to the groove (264); Each of the aforementioned movable devices (25) includes a sliding cylinder (251), a slider (252), a spherical shell (253), an inner cylinder (254), a spring II (255), a transmission rod (256), and a limiting rod (258); the sliding cylinder (251) is slidably engaged with the corresponding through hole (263), and the slider (252) is fixedly connected to the side of the sliding cylinder (251) and slidably engaged with the sliding groove (264); the spring I (265) abuts against the corresponding slider (252); the spherical shell (253) is fixedly connected to the inner cylinder (254). The sliding cylinder (251) faces one end of the turntable I (17); the inner cylinder (254) is fixedly connected to the inner wall of the sliding cylinder (251), and a spring II (255) is fixedly connected inside the inner cylinder (254). The other end of the spring II (255) is fixedly connected to a transmission rod (256); the side of the transmission rod (256) is provided with a limiting groove (257); one end of the limiting rod (258) is fixedly connected to the inner wall of the inner cylinder (254), and the other end of the limiting rod (258) slides in cooperation with the limiting groove (257).
2. The coal mining machine simulation cutting test device according to claim 1, characterized in that: The frame (1) also includes a motor II (15) and a lead screw (13); the upper end of the base (11) is provided with a slide rail (12); the support rod (14) is slidably engaged with the slide rail (12), and the bottom end of the support rod (14) is provided with a transverse threaded hole; one end of the lead screw (13) is connected to the inner wall of the slide rail (12) through a bearing, the lead screw (13) is threadedly connected to the support rod (14) through the threaded hole, and the other end of the lead screw (13) passes through the base (11) and is fixedly connected to the output shaft of the motor II (15); the motor II (15) is fixedly connected to the side of the base (11).
3. The coal mining machine simulation cutting test device according to claim 1, characterized in that: The plurality of cutting teeth (18) are arranged in a ring.
4. The coal mining machine simulation cutting test device according to claim 3, characterized in that: When the movable device (25) is subjected to pressure from the cutting tooth (18), the transmission rod (256) moves toward the corresponding annular groove (243) and contacts the arc block (242).
5. The coal mining machine simulation cutting test device according to claim 4, characterized in that: The number of arc-shaped blocks (242) in each of the annular grooves (243) is greater than the number of movable devices (25) on the corresponding circular ring (262).
6. The test method of the coal mining machine simulated cutting test device according to claim 5, characterized in that: The experimental method includes the following steps: Step 1: Start motor II (15) to move the cutting tooth (18) to a position close to the rotating disk (26); Step 2: Start motor I (16) to drive turntable I (17) to rotate, which in turn drives the cutting tooth (18) to rotate, so that the cutting tooth (18) continuously contacts and rubs against the spherical shell (253) to test the service life of the cutting tooth.