Oscillating hob rock cutting test system

Abstract

The invention discloses an oscillating hob rock cutting test system which is used for loading a rock fixing mechanism of a rock block sample, the rock fixing mechanism comprises a frame-shaped placing table, and a rock measuring module is mounted at the contact edge part of the frame-shaped placing table and the rock block sample; confining pressure loading mechanisms are arranged on the opposite side walls of the frame-shaped placement table and the two rock measurement modules, the confining pressure loading mechanisms apply acting force to rock block samples for loading, the rock measurement modules collect the rock mass of the rock block samples and the rock breaking volume, and rock mining working conditions in different ground stress environments are simulated. Through cooperative work of the multiple oil cylinders, multi-direction and multi-angle deflection of the rear cutting arm is achieved, the working state of a hobbing cutter is adjusted, loading rock breaking is conducted, propelling resistance is effectively reduced, the service life of the rock cutting mechanism is prolonged, data of the rock cutting mechanism in the rock breaking process are collected through the multiple sensor modules, and the rock breaking precision is improved. And a hob adapting to ground stress and optimal cutting parameters are screened out through tests.

Description

Technical Field

[0001] The invention relates to the technical field of mining equipment experimental testing, and in particular to an oscillating roller cutter rock cutting test system. Background Art

[0002] In the process of coal mining, water conservancy project construction and road construction, affected by various complex landforms, the requirements for excavation continue to increase, and the current lack of hard rock cutting by tunnel boring machines limits the development of underground projects. According to statistics, the annual rock tunnel excavation project volume of key domestic coal mines is 2,000 km, and rock tunnel excavation accounts for 15% to 25% of the total project volume, but the construction period accounts for 25% to 35% of the total mine construction period. Therefore, improving the efficiency of rock tunnel excavation has become a top priority. Due to the continuous advancement of underground projects, the depth of the strata continues to increase, the geological conditions become more complex, the high confining pressure and the hardness of the rock continue to increase, and there is an urgent need to develop new equipment and methods for rapid rock tunnel excavation.

[0003] As the depth of coal seam mining gradually increases, the elastic modulus, hardness and breaking strength of the rock increase with the increase of mining depth due to the effect of ground stress. Its uniaxial compressive strength often reaches more than 100MPa, which makes the mechanical cutter wear seriously and shortens its life during operation, seriously restricting the improvement of the tunneling efficiency of deep strata. At the same time, due to the rapid development of coal mining mechanization, the tunneling speed has greatly exceeded the tunneling speed, and the problem of unbalanced mining has become the main factor restricting the high-yield and efficient production of coal mines in my country. When today's pick roadheaders break hard rocks, the picks and pick bases are easily worn and damaged. Frequent maintenance and replacement not only reduce the tunneling efficiency, but also increase the tunneling cost. Therefore, it is necessary to select the appropriate cutting knife and cutting parameters in advance according to the hardness and ground stress conditions of the rock to achieve efficient crushing of hard rocks. This is of great significance to the efficient mining of mines, rapid tunneling, and even the efficient development of my country's energy resources.

[0004] In the prior art, a rock crushing test device is used for rock crushing research, such as the invention patent with application number 201910351078.0, which discloses a diamond saw blade-cutting tooth combined rock crushing test device and its test method, which belongs to the technical field of tunnel boring machine cutting test bench. The device includes a fixed bottom plate, on which a saw blade assembly and a box assembly are arranged; the saw blade assembly support frame in the saw blade assembly can drive the saw blade to move horizontally, and the saw blade group can move vertically along the saw blade assembly support frame, and the motor drives the saw blade to rotate for cutting; the box propulsion cylinder in the box assembly controls the horizontal movement of the rock fixing device, drives the rock inside it to move under the saw blade, and after cutting, the pick cutting assembly performs cutting and crushing and collects the cutting force. First, the rock is sawed, and then the pick is used to crush the rock with the saw blade cutting slit. It can be used for the study of the combined rock breaking performance of the saw blade-cutting tooth, and the rock crushing effect and the cutting force change of the rock with the cutting slit when the pick breaks the rock are observed. The movement is smooth, easy to control, and the experimental effect is excellent.

[0005] The above test scheme mainly adjusts the cutting position, depth, etc., and cannot adapt to the rock cutting test under different ground stresses. The collected data information is less and prone to errors, which cannot meet the test needs of deep stratum tunneling operations. Therefore, it is necessary to invent an oscillating roller cutter rock cutting test system, which can be used for hard rock, semi-coal rock and other rocks, with or without confining pressure, to conduct multi-environment, multi-parameter, and multi-method rock cutting tests, so as to explore new methods for rock excavation. Summary of the invention

[0006] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned prior art and to provide an oscillating roller cutter rock cutting test system. The system loads rock block samples on a frame-type placement table and uses a confining pressure loading mechanism to apply a force to the rock block samples to load them, thereby changing the stress of the rock block samples and simulating rock mining conditions under different ground stress environments. In conjunction with a flexibly adjustable rock cutting mechanism, multiple oil cylinders are used to work together to achieve multi-directional and multi-angle deflection of the rear cutting arm, deflect the roller cutter, and then adjust the working state of the roller cutter to load and break the rock. Multiple sensor modules of the data acquisition component are used to collect data during the rock breaking process of the rock cutting mechanism, and the rock crushing process is studied by performing different loadings to solve the above-mentioned technical problems.

[0007] The technical solution adopted by the present invention is: An oscillating roller cutter rock cutting test system includes a rock fixing mechanism for loading rock block samples, the rock fixing mechanism includes a frame-type placement table, a rock measurement module is installed at the contact edge of the frame-type placement table and the rock block sample, and a confining pressure loading mechanism is provided on the opposite side walls of the frame-type placement table and the two rock measurement modules. The confining pressure loading mechanism applies a force to load the rock block sample, and the rock measurement module collects the rock mass and rock breaking volume of the rock block sample to simulate the rock mining working conditions under different ground stress environments; The system also includes a rock cutting mechanism and a data acquisition component. The rock cutting mechanism is used to load and break the rock block sample. The data acquisition component collects data during the rock breaking process of the rock cutting mechanism. The data acquisition component includes an inclination sensor, a three-axis acceleration sensor, an infrared thermometer, a wire displacement sensor, a dust concentration sensor, a first displacement sensor, a second displacement sensor, a three-axis force sensor and a pressure transmitter. The rock cutting mechanism comprises a frame, a containing shell, a connecting turntable, a cutting arm body and a roller cutter. The frame is movably connected to the connecting turntable, the end of the connecting turntable is hinged to the containing shell, and the frame and the connecting turntable are driven by a horizontal swing cylinder, the connecting turntable and the containing shell are driven by a vertical swing cylinder, the cutting arm body is slidably connected to the inside of the containing shell, and the roller cutter is installed at the front end of the cutting arm body, the containing shell and the cutting arm body are jointly provided with an adjusting cylinder group, and the containing shell and the cutting arm body are driven by the adjusting cylinder group, the horizontal swing cylinder and the vertical swing cylinder respectively make the roller cutter swing laterally and longitudinally, and after the initial parameters are determined, the adjusting cylinder group is controlled to make the cutting arm body slide and swing with the roller cutter to load and break the rock; A transverse movement component is provided at the bottom of the rock cutting mechanism for overall advancement of the rock cutting mechanism, and a longitudinal movement component is provided at the bottom of the rock fixing mechanism for overall movement of the rock fixing mechanism.

[0008] Preferably, the cutting arm body comprises a front cutting arm, a rear cutting arm and a universal joint, the front cutting arm and the rear cutting arm are hinged through the universal joint, and an annular bracket is fixedly installed on the outer side of the rear cutting arm; The adjusting cylinder group includes four adjusting cylinders, which are distributed in a circular array on the outside of the rear cutting arm, and the output end and tail end of the adjusting cylinder are hinged to the circular bracket and the outer wall of the containing shell respectively. The four adjusting cylinders work together to extend and deflect the cutting arm body, thereby adjusting the working state of the roller.

[0009] Preferably, the roller cutter is slidably sleeved on the front end of the rear cutting arm, a fixing cover is installed at the end of the rear cutting arm for axial positioning and pressing the roller cutter, a gap is reserved between the roller cutter and the rear cutting arm, and lubricating oil is filled in the gap, a cavity is arranged inside the rear cutting arm, and an excitation module is arranged in the cavity for making the rear cutting arm and the roller cutter vibrate slightly; The excitation module includes a hydraulic motor, which is installed on the bottom wall of the cavity. A long spline groove is opened on the inner wall of the cavity. A limit sleeve is inserted into the cavity, and a long spline block matching the long spline groove is provided on the outer side of the limit sleeve. An eccentric shaft is commonly inserted at the axis center of the limit sleeve and the fixed cover, and bearings are provided at the connection between the limit sleeve, the fixed cover and the eccentric shaft. An eccentric block is fixedly connected to the outer wall of the eccentric shaft, and the output end of the hydraulic motor is transmission-connected to the eccentric shaft.

[0010] Preferably, both ends of the eccentric shaft are sleeved with shaft sleeves, and the shaft sleeves are interference fit with the inner ring wall of the bearing member; The fixing cover and the rear cutting arm are all provided with sealing gaskets between the roller cutter, and the sealing gaskets are made of rubber material.

[0011] Preferably, a first connecting seat is provided on the frame, and the connecting turntable is rotatably connected to the frame through the turntable connecting seat, turntable connecting seats are fixedly connected to both sides of the top of the frame, and horizontal swing cylinders are hinged on the two turntable connecting seats, and the output ends of the two horizontal swing cylinders are respectively hinged to the two side parts of the connecting turntable end, and the two horizontal swing cylinders are distributed in an eight-shaped shape.

[0012] Preferably, the transverse movement assembly includes a first fixed seat, first sliding guide rails are provided on both sides of the first fixed seat, the frame is slidably connected to the first sliding guide rails, the first fixed seat is fixedly connected to a first sliding oil cylinder, and the output end of the first sliding oil cylinder is transmission-connected to the frame; The longitudinal movement assembly includes a second fixed seat, second sliding guide rails are provided on both sides of the second fixed seat, the frame-type placement table is slidably connected to the second sliding guide rails, the second fixed seat is fixedly connected to a second sliding oil cylinder, and the output end of the second sliding oil cylinder is transmission-connected to the frame-type placement table.

[0013] Preferably, the confining pressure loading mechanism includes multiple confining pressure loading cylinders, which are installed on the frame-type placement table through a fixing plate, and the output end of the confining pressure loading cylinder is hinged with a confining pressure loading plate, and the confining pressure loading cylinder is transmission-connected to the confining pressure loading plate.

[0014] Preferably, the accommodating shell cooperates with the front cutting arm through a spline structure, and when the adjustment cylinder group is advanced and retracted as a whole, the cutting arm body is connected to the roller cutter to extend or retract.

[0015] Preferably, a hole cooperating with the front cutting arm is provided inside the accommodating shell, a groove is provided in the hole, and a ball is placed in the groove. When the oil cylinder group is adjusted to advance and retract as a whole, the cutting arm body is connected to the roller to extend or retract.

[0016] Preferably, the inclination sensor is installed on the rear cutting arm to sense the inclination angle of the rear cutting arm and the roller cutter; The three-axis acceleration sensor, dust concentration sensor and three-axis force sensor are all installed on the rear cutting arm to measure the vibration signal, dust concentration and hob force state during the test respectively; The number of the infrared thermometers is set to be multiple, and the multiple infrared thermometers are evenly distributed on the mounting bracket arranged outside the rear cutting arm, and are used to sense the edge temperature of the roller cutter; The wire displacement sensor is installed on the housing and the front cutting arm, and is installed parallel to the front cutting arm, and is used to measure the extension length of the cutting arm body; The pressure transmitter is installed on the oil pipe of each oil cylinder to sense the output pressure of the hydraulic system; The first displacement sensor and the second displacement sensor are respectively installed on the second sliding cylinder and the first sliding cylinder to sense in real time the displacement changes of the frame-type placement table and the propulsion frame during the propulsion loading process.

[0017] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects: 1. By loading the rock block sample on the frame-type placement table, the confining pressure loading mechanism is used to apply force to the rock block sample to load it, the stress of the rock block sample is changed, and the rock mining conditions under different ground stress environments are simulated. With the flexibly adjustable rock cutting mechanism, multiple oil cylinders are used to work together to achieve multi-directional and multi-angle deflection of the rear cutting arm, so that the roller cutter is deflected, and then the working state of the roller cutter is adjusted to load and break the rock. During the rock breaking process, the propulsion resistance is effectively reduced and the service life of the rock cutting mechanism is extended. The data of the rock cutting mechanism during the rock breaking process is collected by using multiple sensor modules of the data acquisition component, the working efficiency and wear state of the roller cutter are observed, and the records are compared. The roller cutter that adapts to the ground stress and the best cutting parameters are screened out by experiment. The rock crushing process can be studied by multiple methods, multiple parameters, and different loadings; 2. The hob is matched with the excitation module. When the cutter head needs to be replaced or the size of the eccentric block needs to be changed, only the cutter head needs to be quickly disassembled to achieve the functions of changing the cutter and adjusting the excitation force. The mechanical structure is simple and the fit is tight, without the need to frequently disassemble multiple parts. 3. There are multiple groups of cylinders arranged on the test bench, and directional loading movement can be achieved through the coordinated action of multiple cylinders. It does not have to be in an arc shape like a tunnel boring machine. The frame-type placement table is larger in size and has a confining pressure loading mechanism. The rock cutting mechanism and the frame-type placement table are both movable, with a variety of different loading methods, which can be used to study different objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0019] Figure 1 A schematic diagram of the overall structure of the oscillating roller cutter rock cutting test system provided by the present invention; Figure 2 This is a rendering of the installation structure of the rock block sample on the confining pressure loading mechanism in the present invention; Figure 3 It is a partial cross-sectional view of the connection structure between the accommodating shell and the cutting arm body in the present invention; Figure 4 It is a partial cross-sectional view of the rear cutting arm of the present invention; Figure 5 A three-dimensional diagram of the frame of the present invention; Figure 6 It is a schematic diagram of the matching structure of the transverse movement assembly and the second displacement sensor in the present invention; Figure 7 A diagram showing a method of installing the front cutting arm and the accommodating shell in the present invention; Figure 8 This is another installation diagram of the front cutting arm and the accommodating shell in the present invention; Fig. 9 The following is a block diagram showing the specific structure and functions of the data acquisition component of the present invention.

[0020] In the figure: 1. Rock block sample; 2. Confining pressure loading mechanism; 3. Adjustment cylinder group; 4. Containment shell; 5. Connecting turntable; 6. Horizontal swing cylinder; 7. Rack; 8. Transverse movement assembly; 9. Vertical swing cylinder; 10. Cutting arm body; 11. Longitudinal movement assembly; 12. Rock measurement module; 13. Hob; 14. Frame-type placement table; 15. Inclination sensor; 16. Three-axis acceleration sensor; 17. Infrared thermometer; 18. Wire displacement sensor; 19. Dust concentration sensor; 20. Three-axis force sensor; 21. First displacement sensor; 22. Second displacement sensor; 2-1, fixed plate; 2-2, confining pressure loading plate; 2-3, confining pressure loading cylinder; 4-1, ball; 4-2, groove; 4-3, spline structure; 7-1, turntable connecting seat; 7-2, first connecting seat; 8-1, first fixed seat; 8-2, first sliding oil cylinder; 8-3, first sliding guide rail; 10-1, bearing; 10-2, hydraulic motor; 10-3, rear cutting arm; 10-4, universal joint; 10-5, front cutting arm; 10-6, limit sleeve; 10-7, fixed cover; 10-8, shaft sleeve; 10-9, eccentric block; 10-10, eccentric shaft; 11-1, second fixed seat; 11-2, second sliding oil cylinder; 11-3, second sliding guide rail; 4-3-1, spline groove; 4-3-2, spline protrusion; 10-3-1, first bolt hole; 10-3-2, second bolt hole; 10-3-3, annular bracket; 10-3-4, long spline groove; 10-3-5, third bolt hole. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0022] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second" and the like do not indicate the importance of the components, and therefore cannot be understood as limiting the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the scope of protection of the present invention.

[0023] like Figure 1-9 As shown, an oscillating roller cutter rock cutting test system includes a rock fixing mechanism for loading a rock block sample 1, the rock fixing mechanism includes a frame-type placement table 14, a rock measurement module 12 is installed at the contact edge of the frame-type placement table 14 and the rock block sample 1, and a confining pressure loading mechanism 2 is provided on the opposite side walls of the frame-type placement table 14 and the two rock measurement modules 12, and the confining pressure loading mechanism 2 is built in the frame-type placement table 14. The confining pressure loading mechanism 2 servo-loads the rock block sample 1 and applies a force to strengthen it. The rock measurement module 12 collects the rock mass and rock breaking volume of the rock block sample 1 to obtain the stress of the rock block sample 1, and simulates the rock mining working conditions under different ground stress environments; The system also includes a rock cutting mechanism and a data acquisition component. The rock cutting mechanism is used to load and break the rock block sample 1. The data acquisition component collects data during the rock breaking process of the rock cutting mechanism. The data acquisition component includes an inclination sensor 15, a three-axis acceleration sensor 16, an infrared thermometer 17, a wire displacement sensor 18, a dust concentration sensor 19, a first displacement sensor 21, a second displacement sensor 22, a three-axis force sensor 20 and a pressure transmitter. The rock cutting mechanism includes a frame 7, a housing 4, a connecting turntable 5, a cutting arm body 10 and a roller cutter 13. The frame 7 is movably connected to the connecting turntable 5. The end of the connecting turntable 5 is hinged to the housing 4. The frame 7 and the connecting turntable 5 are driven by a horizontal swing cylinder 6. The connecting turntable 5 and the housing 4 are driven by a vertical swing cylinder 9. The cutting arm body 10 is slidably connected to the inside of the housing 4. The roller cutter 13 is installed at the front end of the cutting arm body 10. The housing 4 and the cutting arm body 10 are jointly provided with an adjusting cylinder group 3. The housing 4 and the cutting arm body 10 are driven by the adjusting cylinder group 3. The horizontal swing cylinder 6 and the vertical swing cylinder 9 respectively make the roller cutter 13 swing horizontally and longitudinally. Among them, the cutting arm body 10 includes a front cutting arm 10-5, a rear cutting arm 10-3 and a universal joint 10-4, the front cutting arm 10-5 and the rear cutting arm 10-3 are hinged through the universal joint 10-4, and an annular bracket 10-3-3 is fixedly installed on the outside of the rear cutting arm 10-3; the adjusting cylinder group 3 includes four adjusting cylinders, and the four adjusting cylinders are distributed in an annular array on the outside of the rear cutting arm 10-3, and the output end and tail end of the adjusting cylinder are respectively hinged to the annular bracket 10-3-3 and the outer wall of the accommodating shell 4, the four adjusting cylinders of the adjusting cylinder group 3 are independently controlled, and the output ends of the four adjusting cylinders work together, and when different telescopic lengths are maintained, the multi-directional and multi-angle deflection of the rear cutting arm 10-3 is achieved, thereby causing the roller 13 to deflect; the synchronous telescopic extension of the four adjusting cylinders can realize the overall telescopic extension of the front cutting arm 10-5, and can cause the cutting arm body 10 to extend and deflect, thereby adjusting the working state of the roller 13; After the initial parameters are determined, the oil cylinder group 3 is controlled and adjusted to make the cutting arm body 10 slide and swing with the roller cutter 13 to load and break the rock; A transverse movement assembly 8 is provided at the bottom of the rock cutting mechanism for overall advancement of the rock cutting mechanism, and a longitudinal movement assembly 11 is provided at the bottom of the rock fixing mechanism for overall movement of the rock fixing mechanism.

[0024] Specifically, the roller cutter 13 is slidably sleeved on the front end of the rear cutting arm 10-3, and a fixing cover 10-7 is installed at the end of the rear cutting arm 10-3 for axial positioning and pressing the roller cutter 13. A first bolt hole 10-3-1 is opened at the front end of the rear cutting arm 10-3, and a bolt member is threadedly connected inside the first bolt hole 10-3-1 for installing the fixing cover 10-7. A gap is reserved between the roller cutter 13 and the rear cutting arm 10-3, and lubricating oil is filled in the gap to form an oil film. A cavity is arranged inside the rear cutting arm 10-3, and an excitation module is arranged in the cavity for making the rear cutting arm 10-3 and the roller cutter 13 vibrate slightly; The excitation module includes a hydraulic motor 10-2, which is mounted on the bottom wall of the cavity. A hydraulic motor baffle with a third bolt hole 10-3-5 is provided inside the rear cutting arm 10-3. The fixing bolts or screws of the hydraulic motor 10-2 are reversely installed and can easily pass through the third bolt hole 10-3-5. A hole is opened below the rear cutting arm 10-3 for the hydraulic oil pipe of the hydraulic motor 10-2 to pass through. The other end of the bolt is axially pressed by a limit sleeve 10-6; a long spline groove 10-3-4 is provided on the inner wall of the cavity. A limiting sleeve 10-6 is inserted into the cavity, and a long spline block matching the long spline groove 10-3-4 is provided on the outer side of the limiting sleeve 10-6, an eccentric shaft 10-10 is commonly inserted at the axis of the limiting sleeve 10-6 and the fixed cover 10-7, and bearings 10-1 are provided at the connection between the limiting sleeve 10-6, the fixed cover 10-7 and the eccentric shaft 10-10, an eccentric block 10-9 is fixedly connected to the outer wall of the eccentric shaft 10-10, and the output end of the hydraulic motor 10-2 is transmission-connected to the eccentric shaft 10-10.

[0025] Specifically, both ends of the eccentric shaft 10-10 are sleeved with shaft sleeves 10-8, and the shaft sleeves 10-8 are interference fit with the inner ring wall of the bearing member 10-1; Sealing gaskets are provided between the fixed cover 10 - 7 and the rear cutting arm 10 - 3 and the roller cutter 13 , and the sealing gaskets are made of rubber material.

[0026] Specifically, a first connecting seat 7-2 is provided on the frame 7, and the connecting turntable 5 is rotatably connected to the frame 7 through the turntable connecting seat 7-1. Turntable connecting seats 7-1 are fixedly connected to both sides of the top of the frame 7. Horizontal swing cylinders 6 are hinged on the two turntable connecting seats 7-1. The output ends of the two horizontal swing cylinders 6 are respectively hinged to the two side parts of the end of the connecting turntable 5, and the two horizontal swing cylinders 6 are distributed in an eight-shaped shape.

[0027] In order to correspond to the installation station and install the rock block sample 1 or maintain the rock cutting mechanism, a transverse movement assembly 8 is designed, which includes a first fixed seat 8-1, first sliding guide rails 8-3 are provided on both sides of the first fixed seat 8-1, and the frame 7 is slidably connected to the first sliding guide rails 8-3. The first fixed seat 8-1 is fixedly connected with a first sliding oil cylinder 8-2, and the output end of the first sliding oil cylinder 8-2 is transmission-connected to the frame 7; In order to meet the movement requirements of the rock block sample 1 after being fixed, a longitudinal movement assembly 11 is provided, which includes a second fixed seat 11-1, second sliding guide rails 11-3 are provided on both sides of the second fixed seat 11-1, a frame-type placement table 14 is slidably connected to the second sliding guide rails 11-3, a second sliding oil cylinder 11-2 is fixedly connected to the second fixed seat 11-1, and the output end of the second sliding oil cylinder 11-2 is transmission-connected to the frame-type placement table 14; The first fixing base 8 - 1 and the second fixing base 11 - 1 are horizontally placed on the ground and fixed.

[0028] Specifically, the confining pressure loading mechanism 2 includes multiple confining pressure loading cylinders 2-3, which are installed on the frame-type placement table 14 through a fixing plate 2-1. The output end of the confining pressure loading cylinder 2-3 is hinged with a confining pressure loading plate 2-2, and the confining pressure loading cylinder 2-3 is transmission-connected to the confining pressure loading plate 2-2.

[0029] In order to save space and pump station costs, the four adjusting cylinders of the adjusting cylinder group 3 share the same pump station, and a throttle valve is installed at the terminal branch to adjust the advancement / retraction speed of each cylinder; the second sliding cylinder 11-2, the confining pressure loading cylinder 2-3, the horizontal swing cylinder 6, the vertical swing cylinder 9 and the first sliding cylinder 8-2 can share a pump station, and a throttle valve is installed at the terminal branch to adjust the advancement / retraction speed and position maintenance of each cylinder.

[0030] As a preferred installation method for the cutting arm body 10 and the accommodating shell 4, the accommodating shell 4 and the front cutting arm 10-5 are matched through a spline structure 4-3. The spline structure 4-3 includes a spline groove 4-3-1 and a spline protrusion 4-3-2. The spline groove 4-3-1 and the spline protrusion 4-3-2 are respectively arranged on the front cutting arm 10-5 and the accommodating shell 4. The spline groove 4-3-1 is engaged with the spline protrusion 4-3-2 and slides in the axial direction; when the cylinder group 3 is adjusted to advance and retract as a whole, the cutting arm body 10 is connected to the roller cutter 13 to extend or retract.

[0031] As another preferred installation method for the cutting arm body 10 and the accommodating shell 4, a hole is provided inside the accommodating shell 4 to cooperate with the front cutting arm 10-5, and a groove 4-2 is provided in the hole. A ball 4-1 is placed in the groove 4-2. When the cylinder group 3 is adjusted to advance and retract as a whole, the cutting arm body 10 is connected to the roller cutter 13 to extend or retract.

[0032] Specifically, the various sensors in the data acquisition component are selected according to actual needs; The inclination sensor 15 is installed on the rear cutting arm 10 - 3 and is used to sense the inclination angle of the rear cutting arm 10 - 3 and the roller cutter 13; The three-axis acceleration sensor 16, the dust concentration sensor 19 and the three-axis force sensor 20 are all installed on the rear cutting arm 10-3 to measure the vibration signal, the dust concentration and the force state of the hob 13 during the test respectively; A mounting bracket is provided on the outside of the rear cutting arm 10-3, and a second bolt hole 10-3-2 is provided on the mounting bracket for mounting an infrared thermometer 17; the number of infrared thermometers 17 is set to be multiple, and the multiple infrared thermometers 17 are evenly distributed on the mounting bracket and are circumferentially installed to sense the edge temperature of the hob 13. The specific number of installations is based on the ability to clearly sense the edge temperature of the hob 13; The wire displacement sensor 18 is installed on the accommodating housing 4 and the front cutting arm 10 - 5 , and is installed parallel to the front cutting arm 10 - 5 , and is used to measure the extension length of the cutting arm body 10 ; The pressure transmitter is installed on the oil pipe of each cylinder to sense the output pressure of the hydraulic system in order to calculate the propulsion force; The first displacement sensor 21 and the second displacement sensor 22 are respectively mounted on the second sliding cylinder 11 - 2 and the first sliding cylinder 8 - 2 to sense in real time the displacement changes of the frame-type placement table 14 and the propulsion frame 7 during the propulsion loading process.

[0033] Working principle: The rock block sample 1 is loaded on the frame-type placement table 14, and the confining pressure loading mechanism 2 is used to push the rock block sample 1 to a corner of the frame-type placement table 14, and to assist in fixing it. The confining pressure loading cylinder 2-3 in the confining pressure loading mechanism 2 is adjusted so that its output end applies a force to the rock block sample 1 for loading. The rock measurement module 12 collects the rock mass and rock breaking volume of the rock block sample 1 to obtain the stress of the rock block sample 1, and simulates the rock mining conditions under different ground stress environments; the position of the rock block sample 1 and the rock cutting mechanism is adjusted by the transverse movement component 8 and the longitudinal movement component 11, so that the rock block sample 1 can be cut after installation. Test; When the output ends of the four adjusting cylinders work together and maintain different telescopic lengths, the rear cutting arm 10-3 can be deflected in multiple directions and angles, thereby causing the roller cutter 13 to be deflected; the synchronous telescopic extension of the four adjusting cylinders can realize the overall telescopic extension of the front cutting arm 10-5, and can cause the cutting arm body 10 to extend and deflect, thereby adjusting the working state of the roller cutter 13. After the initial parameters are determined, the adjusting cylinder group 3 is controlled to make the cutting arm body 10 slide and swing with the roller cutter 13 to load and break the rock. During the rock breaking process, multiple sensor modules of the data acquisition component are used to collect data during the rock breaking process of the rock cutting mechanism, observe the working efficiency and wear state of the roller cutter 13, and make records and comparisons. The roller cutter 13 that adapts to the ground stress and the optimal cutting parameters are experimentally selected, and the rock crushing process can be studied by multiple methods, multiple parameters, and different loadings.

[0034] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0035] The above embodiments are only for explaining the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution according to the technical idea proposed by the present invention shall fall within the protection scope of the present invention. The above embodiments of the present invention are described in detail, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. An oscillating cutter rock cutting test system, comprising a rock fixing mechanism for loading a rock block sample (1), characterized in that: The rock fixing mechanism comprises a frame-type placement platform (14), a rock measurement module (12) is installed at the contact edge of the frame-type placement platform (14) and the rock block sample (1), and a confining pressure loading mechanism (2) is provided on the opposite side walls of the frame-type placement platform (14) and the two rock measurement modules (12), the confining pressure loading mechanism (2) applies a force to the rock block sample (1) to load it, and the rock measurement module (12) collects the rock mass and rock breaking volume of the rock block sample (1), so as to simulate the rock mining working conditions under different ground stress environments; The system also includes a rock cutting mechanism and a data acquisition component. The rock cutting mechanism is used to load and break the rock block sample (1). The data acquisition component collects data during the rock breaking process of the rock cutting mechanism. The data acquisition component includes an inclination sensor (15), a three-axis acceleration sensor (16), an infrared thermometer (17), a wire displacement sensor (18), a dust concentration sensor (19), a first displacement sensor (21), a second displacement sensor (22), a three-axis force sensor (20), and a pressure transmitter. The rock cutting mechanism comprises a frame (7), a housing (4), a connecting turntable (5), a cutting arm body (10) and a roller cutter (13); the frame (7) and the connecting turntable (5) are movably connected; an end of the connecting turntable (5) is hinged to the housing (4); a horizontal swing cylinder (6) is used for transmission between the frame (7) and the connecting turntable (5); a vertical swing cylinder (9) is used for transmission between the connecting turntable (5) and the housing (4); the cutting arm body (10) is slidably connected to the inside of the housing (4); The roller cutter (13) is mounted at the front end of the cutting arm body (10), and an adjusting cylinder group (3) is provided on the containing shell (4) and the cutting arm body (10), and the containing shell (4) and the cutting arm body (10) are driven by the adjusting cylinder group (3), and the horizontal swing cylinder (6) and the vertical swing cylinder (9) respectively make the roller cutter (13) swing horizontally and vertically, and after the initial parameters are determined, the adjusting cylinder group (3) is controlled to make the cutting arm body (10) slide and swing with the roller cutter (13) to load and break rocks; A transverse movement assembly (8) is provided at the bottom of the rock cutting mechanism for advancing the entire rock cutting mechanism, and a longitudinal movement assembly (11) is provided at the bottom of the rock fixing mechanism for moving the entire rock fixing mechanism.

2. The oscillating roller cutter rock cutting test system according to claim 1, characterized in that: The cutting arm body (10) comprises a front cutting arm (10-5), a rear cutting arm (10-3) and a universal joint (10-4); the front cutting arm (10-5) and the rear cutting arm (10-3) are hingedly connected via the universal joint (10-4); and an annular bracket (10-3-3) is fixedly mounted on the outer side of the rear cutting arm (10-3); The adjustment cylinder group (3) comprises four adjustment cylinders, which are distributed in a circular array outside the rear cutting arm (10-3), and the output end and the tail end of the adjustment cylinder are respectively hinged to the circular bracket (10-3-3) and the outer wall of the accommodating shell (4). The four adjustment cylinders work together to extend and deflect the cutting arm body (10), thereby adjusting the working state of the roller cutter (13).

3. The oscillating roller cutter rock cutting test system according to claim 1, characterized in that: The roller cutter (13) is slidably sleeved on the front end of the rear cutting arm (10-3); a fixing cover (10-7) is installed at the end of the rear cutting arm (10-3) for axially positioning and pressing the roller cutter (13); a gap is reserved between the roller cutter (13) and the rear cutting arm (10-3); lubricating oil is filled in the gap; a cavity is provided inside the rear cutting arm (10-3), and an excitation module is provided in the cavity for causing the rear cutting arm (10-3) and the roller cutter (13) to vibrate slightly; The excitation module comprises a hydraulic motor (10-2), the hydraulic motor (10-2) being mounted on the bottom wall of the cavity, the inner wall of the cavity being provided with a long spline groove (10-3-4), a limit sleeve (10-6) being inserted into the cavity, and a long spline block matching the long spline groove (10-3-4) being provided on the outer side of the limit sleeve (10-6), an eccentric shaft (10-10) being inserted into the axis of the limit sleeve (10-6) and the fixed cover (10-7), and bearings (10-1) being provided at the connection between the limit sleeve (10-6) and the fixed cover (10-7) and the eccentric shaft (10-10), an eccentric block (10-9) being fixedly connected to the outer wall of the eccentric shaft (10-10), and an output end of the hydraulic motor (10-2) being drivingly connected to the eccentric shaft (10-10).

4. The oscillating roller cutter rock cutting test system according to claim 3, characterized in that: Both ends of the eccentric shaft (10-10) are sleeved with shaft sleeves (10-8), and the shaft sleeves (10-8) are interference fit with the inner ring wall of the bearing component (10-1); A sealing gasket is provided between the fixed cover (10-7) and the rear cutting arm (10-3) and the roller cutter (13), and the sealing gasket is made of rubber material.

5. The oscillating roller cutter rock cutting test system according to claim 1, characterized in that: The frame (7) is provided with a first connecting seat (7-2), and the connecting turntable (5) and the frame (7) are rotatably connected via the turntable connecting seat (7-1), both sides of the top of the frame (7) are fixedly connected with turntable connecting seats (7-1), and both turntable connecting seats (7-1) are hingedly connected with horizontal swing cylinders (6), and the output ends of the two horizontal swing cylinders (6) are respectively hingedly connected to the two side parts of the end of the connecting turntable (5), and the two horizontal swing cylinders (6) are distributed in an eight-shaped shape.

6. The oscillating roller cutter rock cutting test system according to claim 1, characterized in that: The transverse movement assembly (8) comprises a first fixed seat (8-1), first sliding guide rails (8-3) are provided on both sides of the first fixed seat (8-1), the frame (7) is slidably connected to the first sliding guide rails (8-3), the first fixed seat (8-1) is fixedly connected to a first sliding oil cylinder (8-2), and the output end of the first sliding oil cylinder (8-2) is drivingly connected to the frame (7); The longitudinal movement assembly (11) comprises a second fixed seat (11-1), second sliding guide rails (11-3) are provided on both sides of the second fixed seat (11-1), a frame-type placement table (14) is slidably connected to the second sliding guide rails (11-3), a second sliding oil cylinder (11-2) is fixedly connected to the second fixed seat (11-1), and an output end of the second sliding oil cylinder (11-2) is transmission-connected to the frame-type placement table (14).

7. The oscillating roller cutter rock cutting test system according to claim 1, characterized in that: The confining pressure loading mechanism (2) comprises a plurality of confining pressure loading cylinders (2-3), the confining pressure loading cylinders (2-3) being mounted on a frame-type placement platform (14) via a fixing plate (2-1), the output ends of the confining pressure loading cylinders (2-3) being hingedly connected to a confining pressure loading platen (2-2), and the confining pressure loading cylinders (2-3) being transmission-connected to the confining pressure loading platen (2-2).

8. The oscillating roller cutter rock cutting test system according to claim 1, characterized in that: The accommodating shell (4) cooperates with the front cutting arm (10-5) via a spline structure (4-3), and when the adjustment cylinder group (3) is advanced or retracted as a whole, the cutting arm body (10) connected to the roller cutter (13) extends or retracts.

9. The oscillating roller cutter rock cutting test system according to claim 1, characterized in that: The accommodating shell (4) is provided with a hole inside thereof which cooperates with the front cutting arm (10-5), a groove (4-2) being provided inside the hole, and a ball (4-1) being placed inside the groove (4-2); when the adjusting cylinder group (3) is advanced or retracted as a whole, the cutting arm body (10) connected to the roller cutter (13) is extended or retracted.

10. The oscillating roller cutter rock cutting test system according to claim 1, characterized in that: The inclination sensor (15) is mounted on the rear cutting arm (10-3) and is used to sense the inclination angle of the rear cutting arm (10-3) and the roller cutter (13); The three-axis acceleration sensor (16), the dust concentration sensor (19) and the three-axis force sensor (20) are all installed on the rear cutting arm (10-3) to respectively measure the vibration signal, the dust concentration and the force state of the roller cutter (13) during the test; The number of the infrared thermometers (17) is set to be multiple, and the multiple infrared thermometers (17) are evenly distributed on a mounting bracket arranged outside the rear cutting arm (10-3) and are used to sense the edge temperature of the roller cutter (13); The wire displacement sensor (18) is mounted on the accommodating shell (4) and the front cutting arm (10-5), and is mounted parallel to the front cutting arm (10-5), and is used to measure the extension length of the cutting arm body (10); The pressure transmitter is installed on the oil pipe of each oil cylinder to sense the output pressure of the hydraulic system; The first displacement sensor (21) and the second displacement sensor (22) are respectively mounted on the second sliding oil cylinder (11-2) and the first sliding oil cylinder (8-2) to sense in real time the displacement changes obtained by the movement of the frame-shaped placement platform (14) and the propulsion frame (7) during the propulsion loading process.

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