Method and system for simulating large hob rock breaking process through multiple cutter teeth

Abstract

The invention provides a method and system for simulating the rock breaking process of a large hob through multiple hob teeth, belongs to the technical field of hob rock breaking tests, and is used for solving the problems that in the prior art, a traditional hob rock breaking simulation test device is complex, huge and inconvenient to operate. The method comprises the steps that the actual length of a test piece cutter bar is obtained, and the radius of a simulated hob is obtained; determining a point C on the radius BA line of the simulated hob, wherein the distance between the point C and the hob edge A point is equal to the actual length of the test piece cutter bar; acquiring motion parameters of the point C when the simulated hob breaks the rock; during simulation, the tail end of the test piece cutter bar is endowed with the motion parameters, a rock sample is arranged on one side of the head end of the test piece cutter bar, and the motion state of the head end of the test piece cutter bar is consistent with that of the point A on the simulated hob. The method is combined with the system, the working process of a large-diameter hob is simulated through a small-size test piece, the size of the device can be reduced, and the microscopic interaction between the hob and rock can be accurately captured.

Description

Technical Field

[0001] The invention belongs to the technical field of rock-breaking test of roller cutters, and in particular relates to a method and a system for realizing a large-scale rock-breaking process of a plurality of cutter teeth simulating the same. Background Art

[0002] In engineering fields such as tunneling and shaft excavation, shield machine cutter rock breaking technology plays a vital role. The cutter effectively breaks rocks and promotes engineering progress through its unique rolling and cutting mechanism. However, the interaction between the cutter and the rock is complex, and these changes directly affect the rock breaking efficiency and the wear of the cutter. Therefore, in-depth research on the rock breaking mechanism of the cutter and optimization of the cutter design through simulation analysis have become the key to improving engineering efficiency and reducing costs.

[0003] However, the traditional rock-breaking simulation analysis method of roller cutters faces many challenges. Due to the large size of the roller cutters, direct full-scale simulation not only requires a complex and large test device, but also is costly and inconvenient to operate. In order to solve these problems, it is urgent to develop a new type of small-scale specimen simulation method to simulate the rock-breaking process of large-diameter roller cutters at a lower cost and higher efficiency. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a method and system for realizing a plurality of cutter teeth to simulate the rock breaking process of a large roller cutter, so as to solve the problem that the traditional roller cutter rock breaking simulation test device in the prior art is complex and bulky and inconvenient to operate.

[0005] To achieve the above-mentioned object and other related objects, the present invention provides a method and system for realizing a process of simulating the rock breaking of a large roller cutter by using a plurality of cutter teeth.

[0006] Among them, a method for realizing a plurality of cutter teeth simulating a large-scale roller cutter rock breaking process includes:

[0007] Get the actual length of the specimen tool bar and the radius of the simulated hob;

[0008] The center of the simulated hob is point B, a point on the circumference is point A, and according to the actual length of the specimen cutter bar, a point C is determined on the radius BA line of the simulated hob, and the distance between point C and point A is equal to the actual length of the specimen cutter bar;

[0009] Obtaining the motion parameters of point C when the simulated roller cutter is breaking rock;

[0010] During simulation, the motion parameters are assigned to the tail end of the specimen cutter bar, a rock sample is set on one side of the head end of the specimen cutter bar, and the motion state of the head end of the specimen cutter bar is consistent with point A on the simulated hob.

[0011] Optionally, the method of assigning the motion parameters to the tail end of the specimen tool rod is:

[0012] The motion parameters are decomposed into two linear motion components in a control coordinate system, and two linear power sources control the end motion of the specimen tool rod according to the two motion components, thereby synthesizing the motion parameters.

[0013] Optionally, the method for obtaining the motion parameters of the point C on the simulated hob is a measurement method, a simulation method, or a calculation method.

[0014] Optionally, the actual measurement method is: installing the sensor on a real hob and recording the motion parameters of point C during the operation of the hob.

[0015] Optionally, the simulation method is: using computer simulation software to calculate the motion parameters of point C during the operation of the hob.

[0016] Optionally, the calculation method is: using numerical analysis to calculate the motion parameters of point C during the operation of the hob.

[0017] Optionally, a calculation coordinate system is defined: the initial position of B is the origin, the Bx axis is horizontally to the left and parallel to the surface of the rock sample, and the By axis is vertically downward and perpendicular to the surface of the rock sample;

[0018] The BA line on the simulated hob is initially located in the first quadrant, the simulated hob rotates counterclockwise, and the motion parameters of point C include two velocity components along the coordinate axis, and the two velocity components are:

[0019]

[0020] The velocity vector of point C in the calculation coordinate system is:

[0021]

[0022] in:

[0023] v cx is the velocity component of point C in the direction of Bx axis;

[0024] v cy is the velocity component of point C in the By-axis direction;

[0025] ω is the rotational angular velocity of the simulated hob;

[0026] r is the radius of the simulated hob;

[0027] r2 is the difference between the radius of the simulated hob and the length of the specimen shank;

[0028] θ0 is the initial angle between the BA line on the simulated hob and the By axis;

[0029] θ0-ωt is the angle between the BA line on the simulated hob and the By axis at time t.

[0030] Optionally, the control coordinate system is defined as:

[0031] The initial position of B is the origin, the Cx axis is horizontal to the left and parallel to the surface of the rock sample, and the Cy axis is along the BA line and its positive direction is toward the surface of the rock sample;

[0032] Before the simulation begins, the initial position of the specimen tool bar is consistent with the CA line, and the motion parameters of point C are decomposed into two linear motion control components according to the control coordinate system:

[0033]

[0034] in:

[0035] v c1 is the motion control component of point C in the Cx axis direction;

[0036] v c2 is the motion control component of point C in the Cy axis direction;

[0037] β = θ + π / 2;

[0038]

[0039] The end motion of the specimen tool bar is controlled according to two motion control components.

[0040] Optionally, the motion component substitution parameter is:

[0041]

[0042] The tail end of the specimen cutter bar is controlled by two power sources according to two motion control components.

[0043] Among them, a system for implementing a plurality of cutter teeth to simulate a large-scale roller cutter rock breaking process is used to execute the above-mentioned method for implementing a plurality of cutter teeth to simulate a large-scale roller cutter rock breaking process, including:

[0044] Rock samples;

[0045] An X-ray machine, wherein the photographing direction of the X-ray machine is toward the rock sample;

[0046] A specimen cutter bar, wherein the head end of the cutter bar points toward the rock specimen;

[0047] The tail end of the specimen cutter bar is provided with a power source, and the power source comprises:

[0048] The first power source is used to control the specimen cutter bar to move along the Cx axis direction parallel to the surface of the rock specimen;

[0049] The second power source is used to control the specimen tool rod to move along the axial direction of the specimen tool rod, i.e., the Cy axis.

[0050] As described above, the method and system of the present invention for implementing a plurality of cutter teeth to simulate a large-scale roller cutter rock breaking process has at least the following beneficial effects:

[0051] The research cost is significantly reduced, while the flexibility and accuracy of the test are improved. By simulating the working process of a large-diameter roller cutter with a small-sized specimen, the experimental cost and difficulty are significantly reduced, and the microscopic interaction between the roller cutter and the rock can be accurately captured, providing a scientific basis for optimizing the roller cutter design and improving the rock breaking efficiency. In addition, the device is easy to operate and can be widely used, which is of great significance for promoting technological progress in engineering fields such as tunneling and shaft excavation. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 Shown is a schematic diagram of the relationship between the dimensions of the simulated hob and the test piece tool bar of the present invention.

[0053] Figure 2 Shown is a schematic diagram of the coordinate system of the present invention.

[0054] Figure 3 Shown is a schematic diagram of the motion parameter decomposition of the present invention.

[0055] Figure 4 Shown is a schematic diagram of the simulation system of the present invention.

[0056] Among them: a simulated roller cutter 9, a rock sample 6, an X-ray machine 8, a specimen cutter bar 2, a first power source 22, and a second power source 23. DETAILED DESCRIPTION

[0057] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0058] See also Figures 1 to 4. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0059] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0060] For this example, please refer to Figure 1-Figure 3 The present invention provides a method for implementing a plurality of cutter teeth to simulate a large-scale roller cutter rock breaking process, comprising:

[0061] The actual length of the test piece cutter bar 2 is obtained. The test piece cutter bar 2 is set on the test instrument, and its length can be directly measured. The radius of the simulated hob 9 is obtained. If it is to test an existing hob, the hob specification can be consulted or the diameter parameter can be directly measured; if it is to test a hob of an imaginary specification, its radius can be customized according to the needs of the simulation experiment;

[0062] After the radius of the simulated hob 9 is determined, the center of the simulated hob 9 is taken as point B, a point on the circumference is taken as point A, and according to the actual length of the specimen shank 2, a point C is determined on the radius BA line of the simulated hob 9. The distance between point C and point A is equal to the actual length of the specimen shank 2.

[0063] Obtaining the motion parameters of point C when the simulated roller cutter 9 breaks the rock, the motion parameters including speed information;

[0064] During simulation, the above-mentioned motion parameters are assigned to the tail end of the specimen cutter bar 2, a rock sample 6 is set on one side of the head end of the specimen cutter bar 2, and the motion state of the head end of the specimen cutter bar 2 is consistent with point A on the simulated hob 9.

[0065] The principle of the above embodiment is as follows: the cutter teeth on the cutter and the cutter teeth on both sides of the radius are simplified into a test piece cutter bar 2 with rock breaking cutter teeth installed at the end, such as Figure 2As shown, by controlling the movement of the upper tail end of the cutter bar, the rolling of the cutter bar in the illustrated plane is achieved, restoring the actual rock breaking process in which the cutter teeth enter the rock at a certain angle and follow the cutter bar to roll away from the rock. By controlling the rotation speed of the cutter bar, different cutter rotation speeds can also be restored. When the cutter bar is purely rolling, the rotating shaft at the upper end of the cutter bar has a specific horizontal speed. By adding a horizontal speed to the rotating shaft through a horizontal motor, a rock breaking action of sliding "forward" or "backward" during rolling rock breaking can be achieved. Under pure rolling conditions, the rotating shaft at the upper end of the cutter bar has a specific rotation speed and horizontal movement speed. As shown Figure 2 and Figure 4 As shown, the cutter bar on the shortened device can be used to restore the rolling and rock-breaking motion of an actual large-sized roller cutter by controlling the movement of the upper end of the cutter bar on the device.

[0066] The existing control schemes all achieve the planar motion of the BA segment by giving the tool a rolling torque. The motion posture of the tool during the whole process is uncontrollable and can only rotate but not translate. The motion posture depends on the interaction at the tool-rock contact point. The method of the above embodiment uses the CA segment of the tool bar to replace the full length of the hob radius BA, uses a motor to control the motion speed at position C, decomposes the motion speed vector at C into a single-direction motion, and controls it by different motors, so as to achieve the motion equivalence between the CA segment rock contact position A and the BA segment rock contact position A on the real hob, greatly reducing the size of the experimental tool. Through the flexible control of the motor, the rock contact position A can interact with the rock in various motion modes, simulating a variety of rock breaking conditions.

[0067] In summary, the beneficial effects of this embodiment are: through clever design, a small-sized specimen cutter bar is used to simulate the rock-breaking process of a large-sized roller cutter, which significantly reduces the experimental cost and difficulty. This method not only realizes the accurate simulation of the roller cutter's rock-breaking motion, but also realizes the flexible adjustment of the tool's motion posture through motor control, overcoming the limitation of the uncontrollable motion posture in the traditional control scheme. By decomposing the motion velocity vector and controlling it independently, the present invention can simulate a variety of rock-breaking conditions, improving the comprehensiveness and accuracy of the experiment. In addition, the shortened cutter bar design makes the experiment more convenient, while retaining the motion characteristics similar to the real roller cutter, providing strong support for the research on the roller cutter's rock-breaking mechanism and the development of new roller cutters.

[0068] Furthermore, the method of assigning motion parameters to the tail end of the specimen tool rod 2 is: decomposing the motion parameters into two linear motion components in the control coordinate system, and controlling the end motion of the specimen tool rod 2 according to the two motion components by two linear power sources, thereby synthesizing the motion parameters.

[0069] The movement of the roller cutter when breaking rock is relatively complex. Theoretical analysis shows that the basic movement form of the roller cutter breaking rock is the pure rolling of the cutter. In the actual working environment, due to the interaction between the cutter feed and rotation control and the cutter-rock, the complex movement form encountered is the complex movement based on pure rolling. The traditional roller cutter breaking rock test usually uses a full-scale simulation of the pure rolling process of the roller cutter. This embodiment simulates the pure rolling movement process by controlling a small-sized cutter bar.

[0070] During the pure rolling rock-breaking motion of the roller cutter, the overall position of the roller cutter will translate, and the teeth on the outer circumference of the roller cutter will roll on the rock surface. What this embodiment ultimately simulates is the movement speed of the tool-rock contact point, which is achieved by controlling the movement speed of the tail end of the cutter rod through a power source. Since the movement speed of the tool-rock contact point is a vector with a direction, it is difficult to simulate directly through a simple power source. Therefore, in this embodiment, it is decomposed into two linear motion components in the coordinate system, that is, the component moving along a certain axis, so it can be controlled by a simple power source, such as using a telescopic cylinder to control the linear motion components in each direction, so that the final synthesized motion state is consistent with the actual motion state of the roller cutter breaking the rock.

[0071] The above-mentioned embodiments significantly improve the flexibility and accuracy of simulating the rock-breaking motion of the roller cutter. By decomposing the complex motion parameters into two simple linear motion components and controlling them separately with two linear power sources, the goal of simulating complex motion with a simple power source is achieved. This method not only simplifies the experimental device and reduces the control difficulty, but also ensures a high degree of consistency between the simulation process and the actual rock-breaking motion of the roller cutter. By precisely controlling the movement of the rear end of the cutter bar, the present invention can accurately simulate the movement speed of the tool-rock contact point, providing strong support for in-depth research on the rock-breaking mechanism of the roller cutter.

[0072] Specifically, the method for obtaining the motion parameters of the point C on the simulated hob 9 is a measurement method, a simulation method or a calculation method.

[0073] Among them, the actual measurement method is: install the sensor on the actual roller cutter and record the motion parameters of point C during the roller cutter operation. When measuring the motion parameters of the roller cutter on the shield machine, a method combining high-precision sensors and advanced data acquisition systems can be used to ensure that accurate and comprehensive data is obtained.

[0074] For example: First, select and install appropriate sensors. In view of the complexity of the shield machine's roller cutter movement, sensors that can accurately measure multi-dimensional parameters such as position, speed and acceleration can be selected. These sensors usually include displacement sensors, velocity sensors and acceleration sensors, which are installed at key positions of the roller cutter, especially at point C of our concern. During the installation process, it is necessary to ensure that the sensor fits tightly to the surface of the roller cutter to reduce measurement errors. Secondly, build a data acquisition system. The data acquisition system is responsible for receiving data from the sensor in real time and performing preliminary processing. A high-speed data acquisition card can be combined with a high-performance computer to ensure fast data transmission and efficient processing. At the same time, in order to cope with the harsh conditions of the shield machine's working environment, the data acquisition system must also have dustproof, waterproof, and earthquake-resistant characteristics to ensure data continuity and stability. Finally, conduct actual measurement operations and data analysis. Under the normal working state of the shield machine, start the data acquisition system and start recording the motion parameters of point C on the roller cutter. Through real-time monitoring and recording, the motion state data of the roller cutter under different working conditions can be obtained. Subsequently, the collected data is processed and analyzed using data analysis software to extract useful information, such as velocity curves, acceleration changes, etc. When a small-sized specimen is used to simulate large-sized roller cutter rock breaking, these motion data are given as input to the control system that controls the tail end of the specimen cutter bar 2.

[0075] Among them, the simulation method is: using computer simulation software to calculate the motion parameters of point C during the working process of the roller cutter. When using computer simulation software to obtain the motion parameters of point C on the roller cutter (simulated roller cutter 9) on the shield machine, dynamics / kinematics simulation technology can be used. Commonly used simulation software includes SolidWorks Motion, ADAMS, and MATLAB / Simulink combined with Simscape Multibody, etc., which are all widely recognized dynamics and kinematics simulation tools in the industry. Taking ADAMS as an example, it provides powerful dynamic analysis functions and can handle complex mechanical systems. In the software, import or create a three-dimensional model of the shield machine and its roller cutter, and set the constraint relationship between each component, such as hinges, sliding pairs, etc., to simulate the motion under actual working conditions. Next, define the simulation environment. This includes setting the working parameters of the roller cutter, such as rotation speed, footage speed, and mechanical properties of soil or rock. In ADAMS, the interaction between the roller cutter and the rock can be simulated by defining parameters such as force, torque, and contact. To obtain the motion parameters of point C, we can specify the position of point C in the model and set corresponding measurement points or virtual sensors to capture key data such as its motion trajectory, speed, acceleration, etc. during the simulation process. Finally, run the simulation and analyze the results. After starting the simulation, the software will automatically calculate and output the motion parameters of point C during the operation of the disc cutter. Users can intuitively view the motion trajectory, speed curve, acceleration changes, etc. of point C through the post-processing function of the simulation results, so as to fully understand the motion characteristics of the disc cutter during the rock breaking process. These simulation data are given as input to the control system that controls the tail end of the specimen cutter bar 2.

[0076] The calculation method is: using numerical analysis to calculate the motion parameters of point C during the working process of the hob.

[0077] Specifically, first, define the calculation coordinate system, such as Figure 2 As shown: the initial position of B is the origin, the Bx axis is horizontal to the left and parallel to the surface of the rock sample 6, and the By axis is vertically downward and perpendicular to the surface of the rock sample 6;

[0078] The BA line on the simulated hob 9 is initially located in the first quadrant, that is, the quadrant where both the Bx axis and the By axis are positive, and the simulated hob 9 rotates counterclockwise. Figure 2 As shown, the angle between the simulated roller cutter 9 and the vertical axis gradually decreases as it rotates, and point A gradually cuts into the rock sample. At this time, the motion parameters of point C include two velocity components along the coordinate axis, and the two velocity components are:

[0079]

[0080] The velocity vector of point C in the calculation coordinate system is:

[0081]

[0082] in:

[0083] v cx It is the velocity component of point C in the direction of the Bx axis, which includes two parts. The first part ωr is the translational velocity of the simulated roller cutter when it rolls on the rock surface. Its direction is along the positive axis of the Bx axis, and its magnitude is equal to the linear velocity of the roller cutter. The second part is the component of the linear velocity of the simulated roller cutter when it rolls in the Bx axis, and its direction is along the negative axis of the Bx axis.

[0084] v cy is the velocity component of point C in the By-axis direction, is the component of the linear velocity of the simulated hob when rolling in the By-axis, and its direction is along the positive axis of the By-axis;

[0085] ω is the rotational angular velocity of the simulated hob 9;

[0086] r is the radius of the simulated hob 9;

[0087] r2 is the difference between the radius of the simulated hob 9 and the length of the specimen shank 2;

[0088] θ0 is the initial angle between the BA line on the simulated hob 9 and the By axis;

[0089] θ0-ωt is the angle between the BA line on the simulated hob 9 and the By axis at time t, θ0 is the initial angle, and ωt is the rotation angle at time t, such as Figure 2 As shown, θ0-ωt is marked as θ in the figure.

[0090] The above process calculates the motion parameters of point C of the simulated hob 9 when it is actually working, which is mainly characterized by speed. In order to make the specimen shank 2 simulate the motion state of point A on the simulated hob 9, the calculated motion parameters of point C on the simulated hob 9 need to be assigned to the tail end of the specimen shank 2. However, the velocity vector v of point C is H It can be seen that the movement of point C is a complex movement within the plane and cannot be directly achieved through power source control.

[0091] Therefore, the control coordinate system is further defined as:

[0092] The initial position of B is the origin, the Cx axis is horizontal to the left and parallel to the surface of the rock sample 6, and the Cy axis is along the BA line and its positive direction is toward the surface of the rock sample 6;

[0093] Before the simulation begins, the initial position of the specimen tool bar 2 is consistent with the CA line, and the motion parameters of point C are decomposed into two linear motion control components according to the control coordinate system:

[0094]

[0095] in:

[0096] v c1 is the motion control component of point C in the Cx axis direction;

[0097] v c2 is the motion control component of point C in the Cy axis direction;

[0098] β=θ+π / 2, θ=θ0-ωt;

[0099]

[0100] Can be combined Figure 3 , v cx and v cy is the velocity component of C calculated according to the calculation coordinate system, v H is the velocity vector synthesized by the velocity components of C, v c1 and v c2 According to the control coordinate system, v H The velocity components are decomposed again. The control coordinate system is a non-rectangular coordinate system. According to the sine theorem, v can be decomposed. c1 and v c2 .

[0101] The end motion of the specimen tool bar 2 is controlled according to the two motion control components. c1 and v c2 They are all motion parameters in a single direction, so they can be controlled by simple devices, such as electric / hydraulic push rods, or screw slide mechanisms, etc. The motion parameters in each direction are controlled by two power mechanisms, thereby synthesizing the velocity vector v of point C H , ensuring that the end movement of the specimen tool bar 2 is consistent with the actual movement of the hob.

[0102] Furthermore, in the above formula, the motion component is substituted into the parameter:

[0103]

[0104] The tail end of the specimen shank 2 is controlled by two power sources according to two motion control components. When performing the simulation experiment, substituting various parameters into the equation, we can get v c1 and v c2 The value is input into the power source to control the tail end of the specimen tool bar 2 to move along the Cx axis and the Cy axis, so that the movement of the teeth of the specimen tool bar 2 is consistent with the movement of the teeth of the hob.

[0105] In order to realize the above control process, this embodiment provides a system for realizing a plurality of cutter teeth simulating a large-scale roller cutter rock breaking process, which is used to execute the above method for realizing a plurality of cutter teeth simulating a large-scale roller cutter rock breaking process, such as Figure 4 As shown, including:

[0106] Rock sample 6;

[0107] X-ray machine 8, the photographic direction of X-ray machine 8 is toward rock sample 6, which can realize in-situ CT testing of rock crack development during rolling rock breaking process. In the simulated rock breaking process, an X-ray machine is set to observe the changes inside the rock sample under the action of the roller, which significantly improves the accuracy and comprehensiveness of experimental observations. This method can capture the crack propagation and destruction process inside the rock in real time, intuitively display the roller rock breaking effect, and provide an important basis for in-depth analysis of the rock breaking mechanism. At the same time, this also enhances the reliability and persuasiveness of the experimental data, helps to optimize the design of the roller structure and construction parameters, and improves the efficiency and safety of shield construction;

[0108] The specimen cutter bar 2, with the tip of the cutter bar pointing to the rock specimen 6, ensures that the initial state of the specimen cutter bar 2 is consistent with the angle of the imaginary BA line on the simulated hob 9 during calculation. This is the basis for ensuring that the calculated motion parameters are given to the specimen cutter bar 2 and the cutter bar motion is consistent with the hob motion. Figure 1 As shown, initially, the specimen tool bar 2 and the BA line coincide. The specimen tool bar can be understood as being simplified from a certain tooth on a real hob and the area within a certain range on both sides of the radius where it is located. The specimen tool bar does not have to be rod-shaped. For example, when the end of the specimen tool bar simulates only one tooth, a rod shape will be a preferred solution. However, if the end of the specimen tool bar simulates multiple teeth, such as two adjacent teeth, a fan-shaped specimen tool bar will be a more suitable solution;

[0109] The invention also includes a power source arranged at the tail end of the specimen cutter bar 2, the power source including: a first power source 22, which controls the specimen cutter bar 2 to move along the Cx axis direction parallel to the surface of the rock sample 6, that is, controls the tail end of the cutter bar to move according to v c1 The second power source 33 controls the specimen shank 2 to move along the axial direction of the specimen shank 2 in the Cy-axis direction, that is, controls the tail end of the shank to press v c2 Movement, thus synthesizing v H Simulates real reel movement.

[0110] In order to achieve the above effect, Figure 4 As shown, the specimen cutter bar 2 can be fixed on the telescopic shaft of the second power source 33, and the telescopic movement of the cutter bar can be used to control the tail end of the cutter bar to press v c2 Then the second power source 33 is connected to the housing of the first power source 22 of the telescopic shaft, by which the telescopic movement to control the rear end of the knife rod according to v c1 movement; thus synthesizing v H .

[0111] Considering the various motion forms of the tool-rock contact point A, only the motion parameters (v c1 and vc2 ) can easily realize the sliding of the cutter teeth.

[0112] In actual operation, in order to simulate the movement of various radius tools without changing the tool bar, you can increase or decrease the input values ​​of r and r2 in the control. For example, if the actual processing tool bar is 120mm long and the radius of the hob is simulated to be 200mm, set r=200mm and r2=200mm-120mm=80mm. If the tool bar is not changed and the radius of the hob is simulated to be 150mm, set r=150mm and r2=150mm-120mm=30mm.

[0113] The system provided in this embodiment uses a small-sized specimen to simulate the rock breaking of a large-sized roller cutter, which significantly improves the flexibility and efficiency of the experiment. By integrating an X-ray machine for in-situ CT testing, real-time capture of the development of cracks inside the rock is achieved, providing intuitive and accurate data support for in-depth analysis of the rock breaking mechanism. At the same time, the system uses a dual power source design combined with flexible control of the motion parameters of the specimen cutter bar to not only simulate the actual motion state of the roller cutter, but also achieves control of various motion forms of the cutter-rock contact point, meeting the testing requirements under different working conditions. In addition, the system is highly adjustable and can simulate roller cutter movements of different radii by simply adjusting parameters. There is no need to replace the specimen cutter bar, and a short cutter bar can also simulate a large-sized roller cutter, greatly reducing the cost and time of the experiment, and providing a powerful tool for the study of the roller cutter rock breaking mechanism and the development of new roller cutters.

[0114] In summary, the present invention effectively overcomes various shortcomings in the prior art, can produce beneficial technical effects, and has significant progress.

[0115] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A method for realizing a large-scale roller cutter rock breaking process by using a plurality of cutter teeth, characterized in that: include: Obtaining the actual length of the specimen cutter bar (2) and the radius of the simulated hob (9); The center of the simulated hob (9) is taken as point B, a point on the circumference is taken as point A, and according to the actual length of the test piece cutter bar (2), a point C is determined on the radius BA line of the simulated hob (9), and the distance between point C and point A is equal to the actual length of the test piece cutter bar (2); Obtaining the motion parameters of point C when the simulated roller cutter (9) breaks rock; During simulation, the motion parameters are assigned to the tail end of the specimen cutter bar (2), a rock sample (6) is arranged on one side of the head end of the specimen cutter bar (2), and the motion state of the head end of the specimen cutter bar (2) is consistent with point A on the simulated roller cutter (9).

2. A method for realizing a large-scale roller cutter rock breaking process by using a plurality of cutter teeth as claimed in claim 1, characterized in that: The method of assigning the motion parameters to the tail end of the specimen blade rod (2) is as follows: The motion parameters are decomposed into two linear motion components in a control coordinate system, and two linear power sources control the end motion of the specimen tool rod (2) according to the two motion components, thereby synthesizing the motion parameters.

3. A method for realizing a large-scale roller cutter rock breaking process by using a plurality of cutter teeth as claimed in claim 2, characterized in that: The method for obtaining the motion parameters of the point C on the simulated hob (9) is a measurement method, a simulation method or a calculation method.

4. A method for realizing a large-scale roller cutter rock breaking process by using a plurality of cutter teeth as claimed in claim 3, characterized in that: The actual measurement method is: installing the sensor on the actual hob and recording the motion parameters of point C during the working process of the hob.

5. A method for realizing a large-scale roller cutter rock breaking process by using a plurality of cutter teeth as claimed in claim 3, characterized in that: The simulation method is: using computer simulation software to calculate the motion parameters of point C during the working process of the hob.

6. A method for realizing a process of simulating large-scale rock breaking by using a plurality of cutter teeth as claimed in claim 3, characterized in that: The calculation method is: using numerical analysis to calculate the motion parameters of point C during the working process of the hob.

7. A method for realizing a large-scale roller cutter rock breaking process using a plurality of cutter teeth as claimed in claim 6, characterized in that: The calculation coordinate system is defined as follows: the initial position of B is the origin, the Bx axis is horizontally to the left and parallel to the surface of the rock sample (6), and the By axis is vertically downward and perpendicular to the surface of the rock sample (6); The BA line on the simulated hob (9) is initially located in the first quadrant, the simulated hob (9) rotates counterclockwise, and the motion parameters of point C include two velocity components along the coordinate axis, the two velocity components are: The velocity vector of point C in the calculation coordinate system is: in: v cx is the velocity component of point C in the direction of Bx axis; v cy is the velocity component of point C in the By axis direction; ω is the rotational angular velocity of the simulated hob (9); r is the radius of the simulated hob (9); r2 is the difference between the radius of the simulated hob (9) and the length of the specimen cutter bar (2); θ0 is the initial angle between the BA line on the simulated hob (9) and the By axis; θ0-ωt is the angle between the BA line on the simulated hob (9) and the By axis at time t.

8. A method for realizing a large-scale roller cutter rock breaking process by using a plurality of cutter teeth as claimed in claim 7, characterized in that: The control coordinate system is defined as: The initial position of B is the origin, the Cx axis is horizontally to the left and parallel to the surface of the rock sample (6), and the Cy axis is along the BA line and its positive direction is toward the surface of the rock sample (6); Before the simulation begins, the initial position of the specimen tool bar (2) is consistent with the CA line, and the motion parameters of point C are decomposed into two linear motion control components according to the control coordinate system: in: v c1 is the motion control component of point C in the Cx axis direction; v c2 is the motion control component of point C in the Cy axis direction; β = θ + π / 2; The end movement of the specimen cutter bar (2) is controlled according to two motion control components.

9. A method for realizing a large-scale roller cutter rock breaking process using a plurality of cutter teeth as claimed in claim 8, characterized in that: The motion component substitution parameters are: The tail end of the specimen cutter bar (2) is controlled by two power sources according to two motion control components.

10. A system for implementing a process of rock breaking by simulating a large roller cutter with a plurality of cutter teeth, used for executing a method for implementing a process of rock breaking by simulating a large roller cutter with a plurality of cutter teeth as claimed in claim 1, characterized in that: include: Rock samples (6); An X-ray machine (8), wherein the photographing direction of the X-ray machine (8) is toward the rock sample (6); A specimen cutter bar (2), wherein the head end of the cutter bar points toward the rock specimen (6); The tail end of the specimen cutter bar (2) is provided with a power source, and the power source comprises: A first power source (22) controls the specimen cutter bar (2) to move along a Cx axis direction parallel to the surface of the rock specimen (6); A second power source (33) controls the specimen blade rod (2) to move along the axial direction of the specimen blade rod (2) in the Cy-axis direction.

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