CN218912871U

CN218912871U - Cutting assembly, coal cutter drum and coal cutter

Info

Publication number: CN218912871U
Application number: CN202320603800.7U
Authority: CN
Inventors: 赵晋锋; 王希文
Original assignee: Sany Intelligent Equipment Co ltd; Sany Heavy Equipment Co Ltd
Current assignee: Sany Intelligent Equipment Co ltd; Sany Heavy Equipment Co Ltd
Priority date: 2023-03-24
Filing date: 2023-03-24
Publication date: 2023-04-25
Anticipated expiration: 2033-03-24

Abstract

The application provides a cutting assembly, a coal cutter roller and a coal cutter, belongs to the technical field of coal mining, and is used for solving the problem of abrasion failure of the coal cutter roller. The cutting assembly of the present application includes: the blades are arranged on the outer peripheral surface of the coal cutter roller; the blades spirally extend along the circumference of the drum of the coal mining machine; the first cutting part comprises a first coal sweeping tooth and a plurality of first cutting teeth; the first picks are arranged at the top ends of the blades; the first picks are sequentially arranged along the extending direction of the blade and are used for cutting the coal wall; the first coal sweeping teeth are arranged at the top ends of the blades and are positioned at one ends of the first cutting picks far away from the working face; the tooth tip height of the first coal sweeping tooth is lower than that of the first cutting tooth. This application can promote the life of cylinder through reducing stone and coal cinder friction force to the blade afterbody of cylinder.

Description

Cutting assembly, coal cutter drum and coal cutter

Technical Field

The application belongs to the technical field of coal exploitation, and particularly relates to a cutting assembly, a coal cutter drum and a coal cutter.

Background

The roller is a main execution component of the coal mining machine, is directly contacted with the coal wall and is in the worst working environment. The quality of the roller can directly influence the performance of the coal mining machine, thereby influencing the economic benefit of the mining party. Most of the reasons for the failure of the drum are drum wear, particularly the wear of the blade tails on the drum is relatively fast, because during the drum rotation the blades will transport coal from the coal wall side to the mining side, stones or coal blocks between the drum and scraper ledge will accumulate, squeeze the drum and blades, increase friction against the drum, cause wear of the drum blade tails, and cause the drum to fail.

Disclosure of Invention

Therefore, the utility model aims to at least solve one of the technical problems in the prior art or related technologies, and provides a cutting assembly, a coal cutter drum and a coal cutter, wherein the service life of the drum is prolonged by reducing friction force of the tail part of a blade.

In order to solve the above-mentioned problem, the present application provides a cutting assembly, comprising: a blade and a first cutting portion. The blades are arranged on the outer peripheral surface of the coal cutter roller. The blades extend helically along the circumference of the shearer drum. The first cutting part comprises a first coal sweeping tooth and a plurality of first cutting picks. The first picks are disposed on the tips of the blades. The first picks are arranged in sequence along the extending direction of the blade and are used for cutting the coal wall. The first coal sweeping teeth are arranged at the top ends of the blades and are positioned at one ends, far away from the working face, of the first cutting teeth. The tooth tip height of the first coal sweeping tooth is lower than that of the first cutting tooth.

Optionally, the cutting assembly further comprises: an end disk and a second cutting portion. The end plate is arranged at one end of the coal cutter roller. The second cutting part comprises a second coal sweeping tooth and a plurality of second cutting picks. The plurality of second picks are arranged on the end disc of the coal cutter roller and are sequentially arranged on the peripheral surface of the end disc along the circumferential direction of the end disc. The second coal sweeping teeth are arranged on the outer peripheral surface of the end disc and are positioned at one ends of the plurality of second cutting teeth, which are far away from the working surface. The tooth tip height of the second coal sweeping tooth is lower than the tooth tip height of the second cutting tooth.

Optionally, the second pick and the second sweeping tooth are detachably connected to the outer peripheral surface of the end disc.

Optionally, the second pick is the same structure and size as the first pick. The second coal sweeping tooth has the same structure and size as the first coal sweeping tooth.

Optionally, the first pick and the first coal-sweeping tooth are detachably disposed on the blade.

Optionally, the number of the blades is at least two and the extending directions are parallel to each other.

Optionally, the cutting assembly further comprises a plurality of wear blocks. The plurality of wear-resisting blocks are arranged on the side surfaces of the blades, and the plurality of wear-resisting blocks are sequentially arranged along the side edges of the blades.

The application also provides a shearer drum comprising: the roller body and the cutting assembly. The cutting assembly is arranged on the roller body.

Optionally, the shearer drum further comprises a connecting pad. The connecting disc is arranged on the roller body and is coaxial with the roller body, and the connecting disc is connected to the coal mining machine.

The application also provides a coal cutter, which comprises the coal cutter roller.

The beneficial effects are that:

the cutting assembly provided by the utility model is characterized in that the first coal sweeping teeth are arranged at the tail parts of a plurality of first cutting picks on the blade of the coal cutter drum. Along with the rotation of the roller, the first cutting pick can cut the coal wall, so that the coal falling of the roller is realized, and the coal falling and stone blocks are transported between the roller and the ledge of the scraper machine through the blades; the tooth point height of the first coal sweeping tooth is lower than that of the first cutting pick and is located at one end, far away from the working face, of the plurality of first cutting picks, so that coal wall cutting is not involved, but large coal gangue at the tail of the blade can be broken and soft, friction force of the large coal gangue to the tail of the blade of the roller is reduced, and the service life of the roller is prolonged.

Drawings

FIG. 1 is a schematic structural view of a shearer drum according to one embodiment provided herein;

FIG. 2 is a schematic view of the K-direction of FIG. 1;

FIG. 3 is a schematic view of the working state of a shearer drum according to one embodiment provided herein;

FIG. 4 is a side exploded view of a shearer drum of one embodiment provided herein;

FIG. 5 is a schematic view of a first pick according to one embodiment provided herein;

fig. 6 is a schematic structural view of a first coal-sweeping tooth according to an embodiment provided in the present application.

The reference numerals are expressed as:

1. a drum body; 2. an end plate; 3. a blade; 4. a connecting disc; 5. a first pick; 6. a second pick; 7. a wear block; 8. a roller; 9. coal and stone falling; 10. a scraper conveyor; 11. and a first coal sweeping tooth.

Detailed Description

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.

Fig. 1 is a schematic structural view of a shearer drum of the present embodiment. Fig. 4 is a side exploded view of the shearer drum of this embodiment. As shown in fig. 1 and 4, the shearer drum of the present embodiment includes: a drum body 1, a blade 3 and a first cutting portion. The blades 3 are provided on the outer circumferential surface of the drum body 1. The blades 3 extend spirally along the circumferential direction of the drum body 1. The first cutting portion includes: a first coal sweeping tooth 11 and a plurality of first picks 5. A plurality of first picks 5 are provided at the tip of the blade 3. The plurality of first picks 5 are arranged in order along the extending direction of the blade 3 for cutting the coal wall. The first coal sweeping teeth 11 are arranged at the top ends of the blades 3 and are positioned at one ends of the first picks 5 far away from the working surface. The first tooth 11 has a tip height lower than that of the first pick 5.

In some examples, as shown in fig. 1, the end plate 2 is connected to the drum body 1 by welding. So set up, can end dish 2 be fixed in on the cylinder body 1, guarantee the stability of end dish 2 to do benefit to the cutting to the coal wall. In other embodiments, the end plate 2 may be connected to the drum body 1 by bolts, or the end plate 2 may be integrally formed with the drum body 1.

In some examples, as shown in fig. 1, the vane 3 is connected with the drum body 1 by welding. The firm degree of blade 3 can be guaranteed to the setting like this, can reduce the technology degree of difficulty again. However, in other embodiments, the blade 3 and the drum body 1 may be integrally formed, or may be connected by a connection member such as a bolt or a pin.

In some examples, the material of the first pick 5 may be 42CrMo steel, 35CrMnSi steel, or si—mn—mo based quasi-bainitic steel. It will be appreciated that the cutting of coal and rock is subject to high cyclic compressive stress, shear stress and impact load, and the hardness of coal is not very high, but hard mineral materials such as gangue are often encountered, the temperature of the cutting pick is increased due to friction and impact during the cutting of coal and rock, and the cutting pick working under such complex working conditions is required to have both wear resistance and better impact resistance. Therefore, the pick body is generally manufactured from low alloy structural steel. Note that, the material of the first coal-sweeping tooth 11 may be the same as or different from that of the first cutting tooth 5, and this embodiment is not limited thereto.

It should be noted that, in this embodiment, the distance between two adjacent first picks 5 may be set according to the coal seam condition, so long as the coal mining requirement can be met, which is not limited in this embodiment. Further, the spacing between any two adjacent first picks 5 may be the same or different, and may specifically be set according to the use requirement, which is not limited in this embodiment.

As shown in fig. 1 to 3, in the drum 8 for a coal cutter of the present embodiment, first coal sweeping teeth 11 are provided at the tail portions of a plurality of first picks 5 on a blade 3. As the drum 8 rotates, the first pick 5 is able to cut the coal wall, effecting the coal fall of the drum 8 and transporting the coal and stone 9 between the drum 8 and the ledge of the scraper conveyor 10 via the vanes 3. The tooth tip height of the first coal sweeping tooth 11 is lower than that of the first cutting pick 5 and is positioned at one end, far away from the working face, of the plurality of first cutting picks 5, so that coal wall cutting is not participated, but coal falling at the tail of the blade 3 and large coal gangue in the stone 9 can be crushed and soft, friction force of the large coal gangue to the tail of the blade 3 on the roller 8 is reduced, and the service life of the roller 8 is prolonged.

In some embodiments, as shown in fig. 1 and 4, the shearer drum further includes an end pan 2 and a second cutting portion. The end plate 2 is provided at one end of the drum body 1. The second cutting portion includes a second coal sweeping tooth and a plurality of second picks 6. The plurality of second picks 6 are provided on the outer peripheral surface of the end disc 2 and are arranged in order along the circumferential direction of the end disc 2. The second coal sweeping teeth are arranged on the outer peripheral surface of the end disc 2 and are positioned at one ends of the plurality of second cutting teeth 6 far away from the working surface. The tooth tip height of the second coal sweeping tooth is lower than the tooth tip height of the second cutting pick 6.

It should be noted that, in this embodiment, the distance between two adjacent second picks 6 may be set according to the coal seam condition, so long as the coal mining requirement can be met, which is not limited in this embodiment. Further, the spacing between any two adjacent second picks 6 may be the same or different, and may specifically be set according to the use requirement, which is not limited in this embodiment.

The embodiment sets up a plurality of second picks 6 and second coal-sweeping tooth on the outer peripheral face of end plate 2, makes end plate 2 possess the ability of cutting the coal face to can utilize the second coal-sweeping tooth to carry out preliminary crushing to massive coal and gangue, be favorable to improving the coal mining efficiency of cylinder, and reduce extrusion force and frictional force of massive coal and gangue to cylinder body 1 and blade 3.

In some embodiments, referring to fig. 1, the second pick 6 and the second sweeping tooth are removably attached to the outer peripheral surface of the end disc 2.

Specifically, the second pick 6 and the second coal-sweeping tooth may be attached to the outer peripheral surface of the end plate 2 by a pin or bolt. So set up, be convenient for second pick 6 and second sweep coal tooth dismantlement and change. It will be appreciated that in other embodiments the second pick 6 and second sweeping tooth may be fixedly connected to the end disc 2, for example by welding.

Fig. 5 is a schematic view of the structure of the first pick 5 of the present embodiment. Fig. 6 is a schematic structural view of the first coal-sweeping tooth 11 of the present embodiment. In some embodiments, referring to fig. 5 and 6, the second pick 6 is the same structure and size as the first pick 5. The second coal-sweeping tooth has the same structure and size as the first coal-sweeping tooth 11.

In some examples, the second pick 6, the first pick 5, the second coal-sweeping tooth, and the first coal-sweeping tooth 11 are all mounted on the end plate 2 or the drum body 1 by a toothholder. Grooves for mounting the tooth holder can also be arranged on the end plate 2 or the roller body 1 so as to improve the stability of the tooth holder.

In this embodiment, the second pick 6 is identical in structure and size to the first pick 5. The second coal sweeping teeth have the same structure and size as the first coal sweeping teeth 11, so that the types of accessories are reduced, and the roller structure is simplified.

In some embodiments, as shown in fig. 2, the drum for a shearer further includes a plurality of wear blocks 7. The plurality of wear blocks 7 are provided on the side surfaces of the blade 3 and are arranged in sequence along the edges of the blade 3.

In some examples, the wear block 7 is made of alloy post wear steel plate. The hardness of the alloy column wear-resistant steel plate can reach 82HRA, and the alloy column wear-resistant steel plate has good wear resistance.

The cylinder of this embodiment has set up first coal tooth 11 and wear-resisting piece 7 on blade 3, can enough reduce the frictional force of massive gangue to blade 3, can improve the wearability of blade 3 itself again, the effectual life who prolongs the cylinder.

In some embodiments, as shown in fig. 1, the drum body 1 further includes a connection pad 4 thereon. The connecting disc is coaxial with the roller body 1 and is used for connecting a coal mining machine.

Specifically, as shown in fig. 1, the outer periphery of the connection pad 4 is connected to the inner wall of the drum body 1 by welding. By the arrangement, the stress of the roller body 1 can be balanced, and the roller body 1 can be more stable when rotating.

In some embodiments, referring to fig. 1, the first pick 5 and the first sweeping tooth 11 are detachably disposed on the blade 3.

Specifically, the first pick 5 and the first coal-sweeping tooth 11 may be connected to the outer top of the blade 3 by pins or bolts. So set up, be convenient for first pick 5 and first coal-sweeping tooth 11 dismantlement and change. However, it will be appreciated that in other embodiments the first pick 5 and the first sweeping tooth 11 may be fixedly connected to the blade 3, for example by welding.

In some embodiments, referring to fig. 4, the number of blades 3 is at least two and the directions of extension are parallel to each other.

Specifically, the blades 3 are of a single spiral structure (i.e., the number of blades 3 is one). In other embodiments, however, the blades 3 may be of a double-bolt structure (i.e., the number of blades 3 is two) or a triple-helical structure (i.e., the number of blades 3 is 3). It will be appreciated that when the number of blades 3 is two or more, each blade 3 includes a first tooth 11 and a plurality of first picks 5.

On the basis of the above embodiment, this embodiment further provides a coal mining machine, including the above coal mining machine drum. The shearer of the embodiment adopts the shearer drum of the embodiment, so that the shearer has the beneficial effects of the embodiment and is not repeated here. The coal mining machine is guided by and moves on the scraper conveyor, the scraper conveyor is pushed by the hydraulic support, and the hydraulic support is supported by the scraper conveyor to move. And the production capacity of the coal mining machine and the scraper conveyor can meet the production requirement of a working face, the height adjustment range of the coal mining machine and the hydraulic support is suitable for the thickness and the change range of a coal seam, and the frame moving speed of the hydraulic support is required to keep up with the traction speed of the coal mining machine.

It will be readily appreciated by those skilled in the art that the above advantageous ways can be freely combined and superimposed without conflict.

The foregoing description of the preferred embodiment of the present utility model is not intended to limit the utility model to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model. The foregoing is merely a preferred embodiment of the present application and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principles of the present application, and these modifications and variations should also be regarded as the scope of the present application.

Claims

1. A cutting assembly, comprising:

the blades are arranged on the outer peripheral surface of the coal cutter roller; the blades spirally extend along the circumferential direction of the shearer drum;

the first cutting part comprises a first coal sweeping tooth and a plurality of first cutting teeth; the plurality of first picks are disposed on the top end of the blade; the first picks are sequentially arranged along the extending direction of the blade and are used for cutting coal walls; the first coal sweeping teeth are arranged at the top ends of the blades and are positioned at one ends, far away from the working surface, of the first cutting teeth; the tooth tip height of the first coal sweeping tooth is lower than that of the first cutting tooth.

2. The cutting assembly of claim 1, further comprising:

the end disc is arranged at one end of the coal cutter roller;

the second cutting part comprises a second coal sweeping tooth and a plurality of second cutting teeth; the plurality of second picks are arranged on an end disc of the shearer drum and are sequentially arranged on the outer peripheral surface of the end disc along the circumferential direction of the end disc; the second coal sweeping teeth are arranged on the outer peripheral surface of the end disc and are positioned at one ends of the plurality of second cutting picks far away from the working surface; the tooth tip height of the second coal sweeping tooth is lower than the tooth tip height of the second cutting tooth.

3. The cutting assembly of claim 2, wherein the second pick and the second sweeping tooth are removably attached to the outer peripheral surface of the end disc.

4. The cutting assembly of claim 2, wherein the second pick is the same structure and size as the first pick; the second coal sweeping teeth are identical to the first coal sweeping teeth in structure and size.

5. The cutting assembly of claim 1, wherein the first pick and the first sweeping tooth are removably disposed on the blade.

6. The cutting assembly of claim 1, wherein the number of blades is at least two and the directions of extension are parallel to each other.

7. The cutting assembly of claim 1, further comprising a plurality of wear blocks;

the plurality of wear-resisting blocks are arranged on the side surfaces of the blades, and the plurality of wear-resisting blocks are sequentially arranged along the side edges of the blades.

8. A shearer drum comprising:

a drum body;

the cutting assembly of any one of claims 1-4, disposed on the drum body.

9. The shearer drum of claim 8, further comprising a land; the connecting disc is arranged on the roller body and is coaxial with the roller body, and the connecting disc is connected to the coal mining machine.

10. A shearer loader comprising a shearer loader drum as claimed in any one of claims 8 to 9.