Coal mining machine roller structure optimization design method, system, equipment and medium

Abstract

The invention belongs to the technical field of mining machinery, and discloses a coal cutter roller structure optimization design method, system, equipment and medium, and the method comprises the steps: building a roller three-dimensional model based on the structure parameters of a coal cutter roller, the structure parameters comprise the structure parameters of a roller body assembly, an end disc assembly, a cutting tooth assembly and a variable lead blade; constructing a roller cutting simulation model based on the roller three-dimensional model; and on the basis of a multivariate nonlinear regression method, optimizing the structure parameters of the variable-lead blades by taking the optimal loading efficiency as a target, and outputting an optimal roller structure. According to the technical scheme, the loading efficiency of the curvature roller can be improved, the loading efficiency of the roller is optimal, and the time of manual cleaning or repeated back-and-forth cleaning of the roller of the coal mining machine is shortened.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of mining machinery, and particularly relates to a shearer drum structure optimization design method, system, equipment and medium. BACKGROUND

[0002] The shearer drum structure is generally composed of a blade assembly, an end disc assembly, a drum body assembly and a pick assembly. The coal and rock are cut by the rotating movement of the drum and the forward movement of the shearer. After the coal and rock are cut, they fall into the coal containing space in the blade assembly. Through the rotating movement of the drum, the pushing effect of the blade assembly is enhanced, so that the coal and rock move to the tail of the drum and are discharged onto the scraper conveyor. For the drum with a diameter less than 1.6 m, the coal and rock discharging speed and direction are difficult to be effectively improved due to the limited coal containing space between the blades, thereby resulting in poor coal and rock loading efficiency of the small-diameter drum. SUMMARY

[0003] The application aims to provide a shearer drum structure optimization design method, system, equipment and medium to solve the problems in the prior art.

[0004] To achieve the above-mentioned purpose, the application provides a shearer drum structure optimization design method, which comprises the following steps: constructing a drum three-dimensional model based on the structure parameters of the shearer drum, wherein the structure parameters include the structure parameters of the drum body assembly, the end disc assembly, the pick assembly and the variable lead blade; constructing a drum cutting simulation model based on the drum three-dimensional model; optimizing the structure parameters of the variable lead blade based on a multivariate nonlinear regression method, taking the optimal loading efficiency as the target, and outputting an optimal drum structure.

[0005] Optionally, the structure parameters of the variable lead blade include the blade lead, the blade segment number, the lead increment of each blade segment and the circumferential distance of each blade segment.

[0006] Optionally, the lead of the first blade segment of the variable lead blade is X, and the lead of the nth blade segment is X+(n-1)N, wherein N is the lead increment of each blade segment.

[0007] Optionally, the circumferential distances of each blade segment are equal.

[0008] Optionally, the acquisition process of the optimal drum structure specifically comprises the following steps: taking the lead increment of each blade segment and the circumferential distance of each blade segment as independent variables and taking the loading efficiency as dependent variable, and constructing a mathematical model by multivariate nonlinear regression: Y=β 0 +β 1N+β 2 H+β 3 N 2 +β 4 H 2 +β 5 NH+ε wherein, β 0 is an intercept term, β 0 ~β 5 is a regression coefficient, ε is a random error term, Y is a loading efficiency, N is a lead increase of each section of blade, and H is a circumferential distance; Based on the constructed mathematical model, the loading efficiency is optimized, and the optimal drum structure is output.

[0009] A shearer drum structure optimization design system, comprising: A three-dimensional model construction module is configured to construct a drum three-dimensional model according to structural parameters of the shearer drum, wherein the structural parameters include structural parameters of a barrel assembly, an end disc assembly, a pick assembly and a variable lead blade. A simulation model construction module is configured to construct a drum cutting simulation model according to the drum three-dimensional model. A structure optimization module is configured to optimize the structural parameters of the variable lead blade according to a multivariate nonlinear regression method, so as to obtain an optimal drum structure.

[0010] An electronic device comprises a memory and a processor, wherein the memory is configured to store a computer program, and the processor is configured to run the computer program to enable the electronic device to perform the shearer drum structure optimization design method.

[0011] A computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the shearer drum structure optimization design method.

[0012] The technical effects of the present application are: The present application provides a structure design optimization method of a curvature drum, which can better improve the loading efficiency of the curvature drum, so that the loading efficiency of the drum is optimal. Compared with the traditional drum, the curvature drum constructed based on the present application can effectively improve the loading efficiency of the drum and shorten the time for manual cleaning or multiple cleaning of the shearer drum. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] The drawings constituting a part of the present application are used to provide further understanding of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the roller; Figure 2 It is a schematic diagram of the curvature roller structure in the embodiments of the present application; Figure 3 It is a schematic diagram of the roller blade and end disc unfolding in the embodiments of the present application; Figure 4 It is a schematic diagram of the total circumferential distance of the spiral blade in the embodiments of the present application; Figure 5 It is a schematic diagram of the total circumferential distance of the variable lead blade in the embodiments of the present application; Figure 6 It is a flow chart of the roller structure optimization design in the embodiments of the present application. DETAILED DESCRIPTION

[0015] The various exemplary embodiments of the present application will be described in detail below, which should not be considered as limiting the present application, but should be understood as a more detailed description of certain aspects, characteristics and embodiments of the present application.

[0016] It should be understood that the terms described in the present application are only for describing the particular embodiments, and are not used to limit the present application. In addition, for the numerical range in the present application, it should be understood that each intermediate value between the upper limit and the lower limit of the range is also specifically disclosed. Each smaller range between any stated value or intermediate value in the stated range and any other stated value or intermediate value in the stated range is also included in the present application. The upper limit and the lower limit of these smaller ranges can be independently included or excluded from the range.

[0017] Many modifications and variations of the specific embodiments of the present application can be made without departing from the scope or spirit of the present application, which will be apparent to those skilled in the art. Other embodiments obtained from the description of the present application will be apparent to those skilled in the art. The description and examples of the present application are only exemplary.

[0018] As for "contain", "include", "have", "comprise" and the like used herein, they are all open terms, i.e. meaning containing but not limited to.

[0019] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] As shown in Figure 1 - Figure 6 The embodiment provides a shearer drum structure optimization design method, which comprises the following steps: constructing a drum three-dimensional model based on structure parameters of a shearer drum, wherein the structure parameters comprise structure parameters of a barrel assembly, an end disc assembly, a pick assembly and a variable pitch blade; constructing a drum cutting simulation model based on the drum three-dimensional model; and optimizing the structure parameters of the variable pitch blade based on a multivariate nonlinear regression method, taking optimal loading efficiency as the target, and outputting an optimal drum structure.

[0021] At present, the loading efficiency of a small-diameter shearer drum is poor, especially in thin coal seams, and manual cleaning is time-consuming and laborious. If the loading efficiency of coal and rock can be improved, the manual workload and back-and-forth coal cleaning time can be reduced. To solve the problems in the prior art, the embodiment provides a new curvature drum structure, which can effectively change the front and rear coal storage space forms, can change the coal storage space form in a targeted manner for different geological conditions, effectively improves the loading efficiency, and proposes a method for installing and detecting the corresponding structure.

[0022] The traditional drum overall structure comprises a blade assembly (spiral blade, loading blade), a barrel assembly (barrel ring, connecting disc, end cover, etc.), an end disc assembly (end disc, end disc guard plate) and a pick assembly (pick, tooth sleeve and tooth seat), as shown in Figure 1 . The main function of the traditional drum is to discharge coal and rock through the coal storage space formed between adjacent spiral blades. For the traditional drum, the spiral blades with a fixed pitch are wound on the outer cylindrical surface of the barrel. Since the blades have a certain height, a coal storage space is formed between adjacent blades. Since the pitch of the blades is fixed, the coal storage space between the blades is basically unchanged, so that the coal and rock falls into the coal storage space, and the rotation of the drum cannot effectively improve the axial discharge speed of the coal and rock and the discharge direction of the coal and rock.

[0023] To change the coal storage space between the blades, the embodiment provides a curvature drum, as shown in Figure 2 . The curvature drum adopts a variable pitch blade, that is, the pitch of the blade gradually increases from the end disc assembly to the tail of the drum, so that the distance L1 of the transverse section between the blades remains unchanged, and the distance L2 of the longitudinal section gradually increases with the rotation of the drum, thereby increasing the longitudinal accumulation of coal and rock particles. As the coal storage space becomes larger at the tail with the rotation of the drum, more particles are discharged to the outside, effectively changing the axial discharge speed of the coal and rock particles and the discharge direction of the coal and rock particles.

[0024] The specific implementation process of the embodiment comprises: The curvature drum mainly changes the blade structure to make the coal space gradually increase. Therefore, based on the design principle, the helical blade is segmented according to a certain number, and the segmentation number is determined according to the length of the blade. In order to ensure the weldability of the blade, the drum below 1.6 meters is generally segmented into 7 segments. According to the original blade pitch X, in order to improve the loading efficiency of the original drum, the first segment of the variable pitch blade generally takes the original blade pitch X, and the second segment takes X+N, N is the increment of each segment of the blade pitch, generally 50-100 mm, and the nth segment takes X+(n-1)N. In order to ensure the gradually increasing coal space, the circumferential distance H of each segment of the blade remains the same, and the total circumferential distance S2 of the helical blade is less than the total circumferential distance S1 of the variable pitch blade.

[0025] Taking a drum with a diameter of 1600, two blades at both ends and a cutting depth of 800 as an example, the original blade pitch is 620, the blade is segmented into 7 segments, and the blade pitch of each segment increases by 70 mm (generally 50-100), so the first segment of the blade has a pitch of 620, the second segment of the blade has a pitch of 690, and the seventh segment of the blade has a pitch of 1040. The circumferential distance of each segment of the blade is 200.

[0026] Optimization design process: After the design of the variable pitch blade is completed, in order to ensure the loading efficiency of the drum, the circumferential distance H and the increment N of each segment of the blade are taken as independent variables, and the loading efficiency Y is taken as the dependent variable. A mathematical model is constructed by multiple nonlinear regression: Y=β 0 +β 1 N+β 2 H+β 3 N 2 +β 4 H 2 +β 5 NH+ε In the formula, β 0 is the intercept term; β 0 ~β 5 is the regression coefficient; ε is a random error term.

[0027] By discrete element software to build drum cutting simulation model, through the multi-factor experiment method, change the circumferential distance H and each blade lead increment N, namely the value of the independent variable can be obtained under the condition of loading efficiency value, thus the mathematical model of loading efficiency is established, through parameter optimization, the best curvature drum structure is finally obtained.

[0028] In summary, the embodiment proposes a structure design optimization method of curvature drum, which can better improve the loading efficiency of curvature drum, and make the loading efficiency of drum optimal. Compared with the previous original drum, the curvature drum of the embodiment can effectively improve the loading efficiency of the drum, and shorten the time of artificial cleaning or multiple cleaning of the drum by the coal mining machine.

[0029] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for optimizing the design of a coal mining machine drum structure, characterized in that, include: A three-dimensional model of the coal mining machine drum is constructed based on its structural parameters, including the structural parameters of the drum assembly, end plate assembly, cutting tooth assembly, and variable lead blades. A simulation model for drum cutting was constructed based on a 3D model of the drum. Based on the multivariate nonlinear regression method, the structural parameters of the variable lead blade are optimized with the goal of achieving the optimal loading efficiency, and the optimal drum structure is output.

2. The method according to claim 1, characterized in that, The structural parameters of the variable lead blade include blade lead, number of blade segments, lead increase of each segment, and circumferential distance of each segment.

3. The method according to claim 2, characterized in that, The first segment of the variable lead blade has a lead of X, and the lead of the nth segment is X + (n-1)N, where N is the lead increase of each segment.

4. The method according to claim 2, characterized in that, The circumferential distance between each blade segment is equal.

5. The method according to claim 2, characterized in that, The process of obtaining the optimal roller structure specifically includes: Using the lead increase and circumferential distance of each blade segment as independent variables and loading efficiency as the dependent variable, a mathematical model is constructed through multiple nonlinear regression: Y=β 0 +β 1 N+β 2 H+β 3 N 2 +β 4 H 2 +β 5 NH+ε In the formula, β 0 The type is the intercept term. β 0 ~β 5 For regression coefficients, ε For random error term, Y For loading efficiency, N is the lead increase of each blade segment, and H is the circumferential distance; The loading efficiency is optimized based on the constructed mathematical model, and the optimal roller structure is output.

6. A coal mining machine drum structure optimization design system, characterized in that, include: The three-dimensional model building module is used to build a three-dimensional model of the coal mining machine drum based on the structural parameters of the drum. The structural parameters include the structural parameters of the drum assembly, end plate assembly, cutting tooth assembly, and variable lead blades. The simulation model building module is used to build a drum cutting simulation model based on the drum 3D model. The structural optimization module is used to optimize the structural parameters of the variable lead blades based on the multivariate nonlinear regression method, with the goal of achieving the optimal loading efficiency, and output the optimal drum structure.

7. An electronic device, characterized in that, The device includes a memory and a processor, wherein the memory stores a computer program and the processor runs the computer program to enable the electronic device to perform a method for optimizing the structure of a coal mining machine drum according to any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, It stores a computer program, which, when executed by a processor, implements a method for optimizing the design of a coal mining machine drum structure as described in any one of claims 1-5.

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