Blade assembly of coal mining machine roller

Abstract

The invention provides a blade assembly of a roller of a coal mining machine, the blade assembly comprises a plurality of blades connected end to end, the blades and the blade assembly are in a variable curve shape, the average longitudinal distance of the blades is h / n, the average rotation angle is C / n, the longitudinal distance h of the blade assembly is the vertical distance from the tail of the roller body to the surface of an end disc, and n is the number of the blades, the rotation angle of the blade assembly is the difference value of the first lead angle and the second lead angle of the blade assembly, the third lead angle of the previous blade is the fourth lead angle of the next blade, and the fourth lead angle of each blade is the sum of the third lead angle of each blade and the average deflection angle. And the twisting times of each blade and the number of the blades are in a multiple relationship. According to the sectional type blade assemblies, the shape or size of each blade can be flexibly designed, so that the blade assemblies can better improve the change condition of a coal containing space between the blade assemblies, and better deslagging efficiency is achieved.

Description

Technical Field

[0001] The present invention relates to the field of coal shearers, and in particular to a segmented coal shearer drum blade assembly. Background Art

[0002] Currently, drums utilize the coal-holding spaces between blades to transport coal lumps. This places high demands on the blades' coal storage structure, load-bearing capacity, and sliding path. Especially in soft coal seams, the drum's slag removal efficiency significantly impacts coal mine production. As welded components of the pick assembly and crucial structural elements for coal and rock slag removal, the blades' structural design and manufacturing methods significantly determine their efficiency.

[0003] Typically, blade pitch is set and then the blades are cut and manufactured in sections, with the pick assemblies evenly spaced across the blade surface. This structure results in excessive load-bearing capacity at the rear of the blade and consistent coal volume between blades, leading to low slag removal 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 segmented coal mining machine drum blade assembly to reduce the load-bearing capacity of the blade tail and increase the coal holding space at the blade tail, thereby improving the slag discharge efficiency.

[0005] The present application provides a blade assembly for a coal mining machine drum. The blade assembly includes a plurality of blades connected end to end. The blades and the blade assembly are all in a variable curve shape. The average longitudinal distance of the blades is h / n, and the average rotation angle is C / n. The longitudinal distance h of the blade assembly is the vertical distance from the tail of the drum body to the surface of the end plate. The rotation angle C of the blade assembly is the deflection angle of the blade assembly, and n is the number of blades. The rotation angle of the blade assembly is 8°, 10°, or 12°.

[0006] Furthermore, the connection line between the blade assembly and the outer surface of the drum body has a starting point and an ending point, and the rotation angle of the blade assembly is the difference between a first rise angle of the blade assembly at the starting point and a second rise angle at the ending point.

[0007] Furthermore, it also includes a third rise angle at the starting point and a fourth rise angle at the ending point of the connection line between each blade and the outer surface of the drum body, and the third rise angle of the previous blade is the fourth rise angle of the next blade.

[0008] Furthermore, the fourth lead angle of each blade is the sum of the third lead angle of each blade and the average deflection angle.

[0009] Furthermore, the number of twists of each blade is a multiple of the number of blades. Preferably, when the number of twists of each blade is k times the number of blades, each blade twists k times, and for every increase in the average longitudinal distance h / (k*n) on the blade, the blade twists once, and the angle of each twist is an average rotation angle of C / (k*n).

[0010] Furthermore, the number of twists of the blade assembly is determined by the rotation angle of the blade assembly and the deflection angle of the blade assembly, or by the deflection angle of the blade assembly and the length of the blade assembly.

[0011] Furthermore, it also includes a vertical distance, which is the vertical distance between the starting point and the ending point of the blade assembly, and the vertical distance is smaller than the longitudinal distance of the blade assembly.

[0012] Furthermore, the vertical distance and the longitudinal distance satisfy h-100<H<h-60, and the unit is mm.

[0013] In summary, the blade assembly in this application is a segmented design, allowing for individual design and processing of the shape or size of each blade, with all blades connected to form a blade assembly. Based on the relationship between the average rotation angle of the blades, the rotation angle of the blade assembly, the number of blades, and the longitudinal distance, the values ​​of these parameters can be determined based on actual conditions, enabling the blade assembly with variable curvature in this application to better improve the variation in the coal-holding space between blade assemblies and achieve better slag removal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic structural diagram of the shearer drum assembly in this application is shown.

[0015] Figure 2 A simplified structural diagram of the shearer drum assembly in this application is shown.

[0016] Figure 3 Shows a schematic structural diagram of the blade assembly in this application.

[0017] Figure 4 Shows a schematic structural diagram of the blade in this application.

[0018] Component number description

[0019] 100-coal mining machine drum assembly

[0020] 01-Blade assembly

[0021] 011–First Leaf

[0022] 012–Second Leaf

[0023] 02i–ith leaf

[0024] 01n – the nth leaf

[0025] 02-Cut assembly

[0026] 03-Roller

[0027] 04-Serving tray

[0028] D1 - first lift angle of blade assembly

[0029] D2 - Second lift angle of blade assembly

[0030] Ei1 – the third lift angle of any blade

[0031] Ei2 – the fourth lift angle of any blade

[0032] h- longitudinal distance from the tail of the drum to the surface of the end plate DETAILED DESCRIPTION

[0033] The following describes the implementation of the present invention through specific embodiments. People skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0034] See also Figures 1 to 3 . 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. Therefore, they have no substantive 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 efficacy and purpose 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.

[0035] The shearer drum assembly 100 includes a blade assembly 01 and a pick assembly 02. The pick assembly 02 is arranged on the side of the blade assembly 01. The blade assembly 01 is arranged in a spiral along a first direction x around the outer surface of the drum 03. The blade assembly 01 includes a plurality of blades, which are arranged end to end on the outer surface of the drum 03 and arranged in a spiral along the first direction x. Each blade also has a variable curvature shape, and the average value of the rotation angle of all blades is the average rotation angle α. The blade assembly 01 has a variable curvature shape, and the change in curvature is achieved by twisting the blade assembly 01, that is, the number of blades in the blade assembly 01, the number of twists, and the rotation angle are set as needed to achieve the setting of the curvature of the blade assembly 01.

[0036] The longitudinal distance h of the blade assembly 01 is the vertical height from the tail of the drum 03 to the end surface of the end plate 04. The vertical distance H is the height between the starting point A and the ending point B of the connecting line between the blade assembly 01 and the outer surface of the drum 03. The blade assembly 01 has a first lift angle D1 at the starting point A and a second lift angle D2 at the ending point B. The rotation angle C of the blade assembly is the difference between the first lift angle D1 and the second lift angle D2. The rotation angle C of the blade assembly is generally 8°, 10°, 12°, etc. The vertical distance H is smaller than the longitudinal distance h. The number of blades is n, and the average vertical distance variation of each blade is H / n. Preferably, h-100<H<h-60, H is an integer, and the unit is mm.

[0037] The blade assembly 01 includes a first blade 011, a second blade 012, ... an i-th blade 01i, ... an n-th blade 01n, connected end to end. The average longitudinal distance h' of each blade is h / n, and the average rotation angle α is C / n. The starting and ending points of the line connecting each blade 01i to the outer surface of the drum 03 have a third lift angle Ei1 and a fourth lift angle Ei2, respectively, and Ei2 = Ei1 + α. Therefore, since the fourth lift angle E(i-1)2 of the preceding blade is equal to the third lift angle Ei1 of the succeeding blade, the relationship between the third lift angle Ei1 and the fourth lift angle Ei2 of the same blade can be used to obtain the third and fourth lift angles of all blades. All blades are then connected end to end to form the blade assembly 01. The third lift angle E11 of the first blade 011 is the first lift angle D1 of the blade assembly, and the fourth lift angle En2 of the last blade 01n is the second lift angle D2 of the blade assembly.

[0038] Preferably, the number of blades n and the number of twists N of the blade assembly are in a multiple relationship. When the number of blades n is equal to the number of twists N, each blade has one and only one twist. The average longitudinal distance h' of each blade is h / n, and the average rotation angle α is C / n. When the number of blades n is equal to N / 2, each blade has two twists, that is, the blade twists once for every increase in the average longitudinal distance h / (2n), and the angle of each twist is the average rotation angle C / (2n). The rotation angle after the first twist is Ei1+C / (2n) (i.e., the angle of the blade after the first twist is Ei1+C / (2n)). Figure 4 The rotation angle after the second twist is Ei1+C / n (i.e. the second lift angle of the blade Ei2), and the average rotation angle α of each blade is C / n, as shown in Figure 4As shown. When the number of blades n is equal to N / 3, each blade has three twists. The blade twists once for every increase in the average longitudinal distance h / (3n). The angle of each twist is the average rotation angle C' / (3n). The rotation angle after the first twist is Ei1+C / (3n), the rotation angle after the second twist is Ei1+2*C / (3n), and the rotation angle after the third twist is Ei1+C / n (i.e., the second lift angle Ei2 of the blade). The first lift angle D1 of the blade assembly is used as the third lift angle of the first blade. The fourth lift angle of the first blade is calculated based on the average rotation angle α... After calculating the fourth lift angle of each blade in sequence, all the blades are connected end to end to form the blade assembly 01.

[0039] After obtaining the number of torsions, number of blades, average deflection angle and average longitudinal distance of the blade assembly, the coal storage space between adjacent blade assemblies can be calculated. If the coal storage space does not meet the requirements, the values ​​of the above parameters can be adjusted again.

[0040] In another embodiment, the number of twists N of the blade assembly may be determined first, and then the number of blades n may be determined. The number of twists N is determined by the longitudinal distance h of the blade assembly and the rotation angle C of the blade assembly.

[0041] In another embodiment, the longitudinal distance can also be calculated using the deflection angle C and the blade length L, that is, the number of twists n is determined by the rotation angle C and the length L of the blade assembly. For example, when the maximum pressing length of the blade pressing mold is K, the number of twists n = L / K, and the blade length L is the length of the line connecting the blade assembly and the outer surface of the drum.

[0042] In another embodiment, if the rotation angle of each blade is known to be Q, the number of twists of the blade assembly n = C / Q. The rotation angle Q and the maximum pressing length K are related to the pressing machine, and the Q value is different for different machines.

[0043] Each blade is manufactured according to the average longitudinal distance h' and the average rotation angle C' of each blade, and the blades are connected in sequence to form a blade assembly 01. The blade assembly 01 forms a smooth spatial curve at one end close to the drum.

[0044] The blade assembly 01 in this application is a segmented design, in which the shape or size of each blade is designed and manufactured separately, and then all the blades are connected to form a blade assembly. According to the relationship between the average rotation angle α of the blade, the rotation angle C of the blade assembly, the number of blades n, and the longitudinal distance h, the values ​​of these parameters can be determined according to actual conditions, so that the blade assembly with variable curvature in this application can better improve the change in the coal storage space between the blade assemblies and have better slag discharge efficiency. The segmented blade assembly can also provide a reference for the arrangement of the pick assembly. After optimizing the position of the pick assembly, the cutting efficiency can be improved, forming a gradual deformation cutting and rock breaking system.

[0045] 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 skilled in 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 one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A blade assembly for a coal mining machine drum, characterized in that: The blade assembly includes several blades connected end to end, and the blades and the blade assembly are both in the shape of a variable curve. The average longitudinal distance of the blades is h / n, and the average rotation angle is C / n. The longitudinal distance h of the blade assembly is the vertical distance from the tail of the drum body to the surface of the end plate, the rotation angle C of the blade assembly is the deflection angle of the blade assembly, and n is the number of the blades.

2. The blade assembly of the coal mining machine drum according to claim 1, characterized in that: The connecting line between the blade assembly and the outer surface of the drum body has a starting point and an ending point, and the rotation angle of the blade assembly is the difference between a first rise angle of the blade assembly at the starting point and a second rise angle at the ending point.

3. The blade assembly of the coal mining machine drum according to claim 1, characterized in that: It also includes a third rise angle at the starting point and a fourth rise angle at the ending point of the connection line between each blade and the outer surface of the drum body, and the third rise angle of the previous blade is the fourth rise angle of the next blade.

4. The blade assembly of the coal mining machine drum according to claim 3, characterized in that: The fourth lead angle of each blade is the sum of the third lead angle of each blade and the average deflection angle.

5. The blade assembly of the shearer drum according to claim 1, characterized in that: The twisting times of each blade is in multiple relation to the number of blades.

6. The blade assembly of the shearer drum according to claim 5, characterized in that: When the number of twists of each blade is k times the number of blades, each blade twists k times, and for every increase in the average longitudinal distance h / (k*n) on the blade, the blade twists once, and the angle of each twist is an average rotation angle of C / (k*n).

7. The blade assembly of the shearer drum according to claim 1, characterized in that: The twisting number of the blade assembly is determined by the rotation angle of the blade assembly and the deflection angle of the blade assembly, or by the deflection angle of the blade assembly and the length of the blade assembly.

8. The blade assembly of the coal mining machine drum according to claim 2, characterized in that: It also includes a vertical distance, which is a vertical distance between the starting point and the ending point of the blade assembly, and the vertical distance is smaller than the longitudinal distance of the blade assembly.

9. The blade assembly of the shearer drum according to claim 8, characterized in that: The vertical distance and the longitudinal distance satisfy h-100<H<h-60, and the unit is mm.

10. The blade assembly of the shearer drum according to claim 1, wherein: The rotation angle of the blade assembly is 8°, or 10°, or 12°.

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