Fluted Flat-End Disc and Shearer Drum

Abstract

The present invention relates to a grooved flat end disc and a shearer drum. The main body of the grooved flat end disc is a circular flat plate-like structural member. A circular groove is provided on the front end face of the main body. A plurality of reinforcing ribs radially distributed around the center are arranged in the circular groove. The reinforcing ribs divide the circular groove into a plurality of partitions. The end face tooth seat installation positions are dispersedly arranged in these partitions. A plurality of end disc tooth seat installation positions are arranged at intervals along the circumference on the outer peripheral edge of the main body. The shearer drum includes a drum body and the grooved flat end disc. The grooved flat end disc is sleeved on the front end of the drum body and fixed by welding. The corresponding specifications of end face teeth and end disc teeth are respectively installed at the end face tooth seat installation positions and the end disc tooth seat installation positions. The flat end disc of the present invention has a simple manufacturing process, is easy to obtain high strength, facilitates the installation and calibration of the end face teeth and the end disc teeth, has high precision and small wear, and makes the shearer drum have a longer service life.

Description

Technical Field

[0001] The present invention relates to a grooved end plate and a shearer drum using such an end plate. Background Art

[0002] The end plate of the drum is an important part on the shearer drum. It is welded to the drum body, and end plate teeth are installed on its outer diameter to protect the drum from cutting coal by inclined cutting. The existing drum end plates generally have a taper α (see Figure 5 ). In the installed state, the end plate 1' extends obliquely forward and outward, and the outer edge of the end plate overhangs beyond one end of the near coal wall side of the drum body 2. A plurality of end plate tooth seats 4 are installed at intervals around the outer edge of the end plate. This kind of end plate has the following main deficiencies. First, this kind of tapered end plate is usually formed by rolling, which is difficult to manufacture and has low manufacturing accuracy. Second, the rolling process determines that the thickness of this kind of end plate cannot be too thick. Therefore, the self-strength of this kind of end plate is weak, and it is difficult to install heavy-duty tooth seats on it. Third, when installing end face teeth on this kind of end plate, since the conical surface is used as the installation reference surface, the angle of the end face teeth deflects towards the inner side in the radial direction, and it is difficult to calibrate, resulting in low installation accuracy. As a result, the force condition of the teeth during cutting is poor and they are easily damaged.

[0003] In addition, the end plate teeth and their tooth seats of the existing shearer drums are very easy to be damaged, resulting in a significant reduction in the service life of the drums. Summary of the Invention

[0004] The present invention aims to provide a grooved flat end plate and a shearer drum. The flat end plate has a simple manufacturing process and is easy to obtain high strength. Based on this, the position of the cutting tool is accurate and easy to control, making the force on the cutting tool more reasonable. Therefore, the loss is small, and the shearer drum has a longer service life due to the adoption of this flat end plate.

[0005] The main technical solutions of the present invention are as follows:

[0006] A grooved flat end plate, the main body of which is a circular ring-shaped flat structural member. A circular ring-shaped groove is formed on the front end face of the main body, and a plurality of end plate tooth seat installation positions are arranged along the circumferential direction in the circular ring-shaped groove.

[0007] Preferably, a plurality of reinforcing ribs distributed in a central radial pattern are arranged in the circular ring-shaped groove. Both ends of each reinforcing rib are fixedly connected to the inner and outer side walls of the circular ring-shaped groove respectively. The reinforcing ribs divide the circular ring-shaped groove into a plurality of partitions, and the end plate tooth seat installation positions are dispersedly arranged in these partitions.

[0008] One or more end plate tooth seat installation positions are arranged in a single partition. When there are multiple end plate tooth seat installation positions, the multiple end plate tooth seat installation positions correspond to end plate tooth seats of different specifications.

[0009] When there are multiple end face tooth seat mounting positions within a single said partition, the larger the specification of the end face tooth seat corresponding to the end face tooth seat mounting position, the farther it is from the axis of the main body, and the smaller the specification of the end face tooth seat corresponding to the end face tooth seat mounting position, the closer it is to the axis of the main body.

[0010] One end face tooth seat with a corresponding specification is installed on each end face tooth seat mounting position. The axis of the pick mounting hole of the end face tooth seat extends obliquely forward, and this axis is perpendicular to the shortest connection line from the corresponding end face tooth seat mounting position to the axis of the main body.

[0011] A plurality of end disk tooth seat mounting positions are arranged at intervals along the circumference on the outer peripheral edge of the main body. One end disk tooth seat with a corresponding specification is installed on each end disk tooth seat mounting position. The axis of the pick mounting hole of the end disk tooth seat extends radially outward and forward. The axes of the pick mounting holes of all the end disk tooth seats include at least three different extending directions, and the axis directions of any two adjacent end disk tooth seats are different.

[0012] All the end disk tooth seats are divided into several end disk tooth seat groups arranged in sequence from head to tail. In each end disk tooth seat group, the angle between the axis direction of the pick mounting hole of the end disk tooth seat and the front end face of the main body becomes smaller in the arrangement order from the head end to the tail end.

[0013] A plurality of sector baffles are also fixed on the front end face of the main body. The sector baffles are evenly distributed at intervals along the circumferential direction. The sector baffles correspond to the end disk tooth seat groups one by one. Each sector baffle shields a part of the end disk tooth seats near the tail end in the corresponding end disk tooth seat group, and the other part of the end disk tooth seats near the head end is located between two adjacent sector baffles.

[0014] A shearer drum includes a drum body and the grooved flat end disk. The grooved flat end disk is sleeved on the front end of the drum body and fixed by welding. End face teeth and end disk teeth with corresponding specifications are respectively installed in the end face tooth seats and end disk tooth seats.

[0015] When the positions of the tooth tips of the end disk teeth and end face teeth coincide in the same radial plane after axial rotation, a curve protruding forward and outward will be enveloped.

[0016] The beneficial effects of the present invention are:

[0017] The grooved flat end disk of the present invention can be made by cutting, assembling and welding a plate, without the need for rolling taper. The manufacturing process is simple, the manufacturing accuracy is high, and no special equipment is required, so the production cost is relatively low.

[0018] Due to the regular shape of the groove, the bottom surface of the groove for installing the end face tooth seat is a plane, which facilitates the installation of the end face tooth seat, has high installation accuracy, and is easy to achieve balanced force on both the inner and outer sides in the radial direction of the end face teeth. The pick is prone to rotation and the wear is uniform. Therefore, the loss of the end face teeth is reduced and the service life of the end face teeth is extended.

[0019] Since the convex curve-shaped end face tooth group can protect the end disk teeth, the service life of the end face teeth is extended, which is equivalent to extending the service life of the end disk teeth.

[0020] Since there is no need for rolling, the thickness of the end disk can be increased. Therefore, the strength of the end disk can be improved through thickening design as needed. By arranging reinforcing ribs in the circular groove, the strength of the end disk can be further improved, and the service life of the drum is also extended. With these strength improvement designs, heavy-duty tooth seats can be installed on the end disk, enabling the corresponding drum to meet the requirements of heavy loads.

[0021] When an inclined end disk is used, the rolling process determines that when it is applied to a drum with a small diameter, the thickness needs to be thinned, and usually only end disk teeth can be installed, without the structural basis for installing end face teeth. However, since the flat end disk of the present invention does not require rolling, even when used on a drum with a small diameter, the thickness of the flat end disk can be relatively thick. Therefore, it is possible to arrange the circular groove and the end face teeth, and thus the function of the end face teeth can be exerted.

[0022] Since the inclined end disk occupies more radial and axial space, even if the end face teeth can be installed, the end face teeth need to protrude axially more, resulting in a poor stress state and being easily damaged. However, the flat end disk of the present invention itself does not occupy too much radial and axial space. Therefore, the end face teeth installed on it do not protrude forward too much. Therefore, the end face teeth have higher structural strength and rigidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the front view of an embodiment of the drum of a shearer according to the present invention;

[0024] Figure 2 is Figure 1 the A-A rotating sectional view of

[0025] Figure 3 is the perspective view of another embodiment of the drum of a shearer according to the present invention;

[0026] Figure 4 is the schematic diagram of the distribution of the tooth tips of the end face teeth and the tooth tips of the end disk teeth of the drum of a shearer according to the present invention.

[0027] Figure 5 is the structural schematic diagram of an existing drum of a shearer.

[0028] Reference Signs:

[0029] 1. Grooved flat end disc; 1-1. Main body; 1-2. Annular groove; 1-3. Reinforcing rib; 1-4. Sector baffle; 1'. Tapered end disc; 2. Drum body; 3. End face tooth seat; 4. End disc tooth seat; b1. Larger-sized end face tooth seat; b2. Smaller-sized end face tooth seat. Detailed implementation mode

[0030] The present invention discloses a grooved flat end disc 1, as Figures 1-4 shown. Its main body 1-1 is an annular flat plate-like structural member. An annular groove 1-2 is formed on the front end face of the main body (the end face close to the coal wall side during application). A plurality of end face tooth seat installation positions are arranged along the circumferential direction in the annular groove for installing the end face tooth seat 3 and end face teeth. The end face teeth can form cut grooves and cracks on the coal wall prior to the end disc teeth, which is equivalent to pre-crushing the coal wall. Therefore, the cutting amount and force on the end disc teeth are reduced, and the consumption of the end disc teeth is slowed down. Thus, it plays a protective role for the end disc teeth and extends the service life of the end disc teeth. The annular groove is usually coaxial with the main body.

[0031] The grooved flat end disc can be made by cutting, assembling and welding a plate. Since it does not need to be rolled into shape and does not require special equipment, it is easy to manufacture, has high manufacturing precision and reduced processing costs.

[0032] The annular groove is a double-sided groove, and its cross-section is rectangular. The groove bottom surface is a plane perpendicular to the axis of the main body. Compared with the traditional tapered end disc, the surface for installing the end face tooth seat is no longer a conical surface but a plane, which makes the installation of the end face tooth seat more convenient and the positioning more accurate. The annular groove is usually closer to the inner edge in the radial direction of the main body. In this embodiment, the groove width of the annular groove is 80-100 mm. The end face pick is installed in the end face tooth seat, which can be disassembled, convenient for replacement, and does not affect the normal use of the grooved flat end disc. The end face teeth also participate in the axial cutting of the coal wall. By adjusting the depth of the annular groove, the depth of the end face teeth participating in the coal wall cutting can be controlled. The depth of the annular groove can be adjusted according to the inclination angle of the end face teeth. For example, ensure that the axial extension height of the end face tool system (the general term for the end face tooth seat and its picks) is greater than that of the end disc tool system (the general term for the end disc tooth seat and its picks).

[0033] Preferably, a plurality of reinforcing ribs 1-3 distributed in a central radial pattern are provided in the annular groove. Both ends of each reinforcing rib are fixedly connected to the inner and outer side walls of the annular groove, usually by welding. The reinforcing ribs can improve the structural strength of the flat end plate with a groove, and at the same time, the reinforcing ribs can also protect the end face tooth seat from being worn by large stones. The reinforcing ribs divide the annular groove into a plurality of partitions, and the end face tooth seat installation positions are dispersedly arranged in these partitions. The center of the central radial pattern is located on the axis of the main body. The reinforcing ribs are preferably evenly distributed in the circumferential direction. Correspondingly, the end face tooth seat installation positions are also preferably evenly distributed according to the partitions. The number of reinforcing ribs can be adjusted according to the number of end face tooth seats.

[0034] One or more end face tooth seat installation positions can be provided in a single partition, that is, one or more end face teeth are allowed to be installed. When there are multiple end face tooth seat installation positions in the partition, the multiple end face tooth seat installation positions are preferably corresponding to end face tooth seats of different specifications. Attached Figure 3 In the illustrated embodiment, one end face tooth seat installation position is provided in each partition. Attached Figure 1 In the illustrated embodiment, the end face tooth seat installation positions applicable to two specifications of end face teeth, one large and one small, are provided in each partition.

[0035] When there are multiple end face tooth seat installation positions in a single partition, their arrangement method is preferably: the larger the specification of the end face tooth seat corresponding to the end face tooth seat installation position, the farther away from the axis of the main body, and the smaller the specification of the end face tooth seat corresponding to the end face tooth seat installation position, the closer to the axis of the main body. As Figure 4 shown, the purpose of such an arrangement is that when the positions of the tips of the end face teeth are superposed on the same radial plane after axial rotation, a curve protruding forward can be enveloped, and the curve protrudes more forward at the position farther away from the axis of the main body, just able to smoothly connect with the corresponding enveloping curve of the end plate teeth. The end face teeth farther away from the axis of the main body are closer to the end plate teeth. Setting the larger-sized end face teeth at the position closer to the end plate teeth has a more obvious effect of sharing the force of the end plate teeth. Further, it is preferably that the end face tooth seat installation positions in the same partition are staggered from each other in the circumferential direction, so as to make full use of the installation space of the end face teeth.

[0036] Further, a corresponding specification of end face tooth seat is installed on each end face tooth seat installation position. The axis of the pick mounting hole of the end face tooth seat extends obliquely forward, and this axis is perpendicular to the shortest connection line from the corresponding end face tooth seat installation position to the axis of the main body. When the flat end plate with a groove rotates with the drum it is located in for work, the end face teeth are evenly stressed on the inner and outer sides in the radial direction of the drum, and the picks are easy to rotate and will not be unevenly worn, so the service life is longer. Since the end face teeth protect the end plate teeth and the end face teeth have a long service life, the service life of the end plate teeth is correspondingly extended, especially Figure 1 、 4Among the end disc teeth A (the end disc teeth furthest forward), since the face teeth share a considerable part of the cutting reaction force for it, and the face teeth cut a coal groove on the coal wall to form pre-cracking, which further reduces the force on the end disc teeth A, so its service life is prolonged. On the contrary, if the face tooth holders are installed on a traditional tapered end disc, even without considering the large installation errors caused by the curved installation reference surface, just the fact that the axis of the pick mounting hole of the face tooth holder deflects towards the core in the radial direction of the end disc is sufficient to cause a large radially outward component force from the coal wall on the face teeth when the drum rotates, resulting in fast wear and short service life of the face teeth.

[0037] A plurality of end disc tooth holder mounting positions are also arranged at intervals along the circumference on the outer peripheral edge of the main body, and a corresponding specification end disc tooth holder 4 is installed on each end disc tooth holder mounting position. The axis of the pick mounting hole of the end disc tooth holder extends radially outward and forward. The axes of the pick mounting holes of all end disc tooth holders include at least three different extending directions, and the axis directions of any two adjacent end disc tooth holders are different. As Figure 4 shown in the figure, A - E represent various different directions of the axes of the pick mounting holes of the end disc tooth holders.

[0038] The bottom surface of the end disc tooth holder is its installation reference surface and is also a plane. In order to facilitate the axis direction of the pick mounting hole of the end disc tooth holder to meet the above requirements, the surface at the end disc tooth holder mounting position can be set as an inclined plane. The thickness of the flat end disc with grooves in the front-back direction can be freely designed as required, so this flat end disc can achieve a relatively high self-strength, making it easier to configure heavy-duty end disc tooth holders on it.

[0039] All end disc tooth holders can be divided into several end disc tooth holder groups arranged in sequence from head to tail. For example, there are 4 end disc tooth holder groups in the embodiment shown in the attached figure. The angle between the axis direction of the pick mounting hole of the end disc tooth holders within each end disc tooth holder group and the front end face of the main body becomes smaller in the arrangement order from the head end to the tail end. So as to form multiple levels axially and perform stratified cutting during coal cutting, more evenly disperse the cutting load to each end disc tooth, and reduce the force on a single end disc tooth. The end disc tooth holder groups preferably have an even number, and these end disc tooth holder groups are rotationally symmetrically distributed around the axis of the flat end disc.

[0040] Several sector baffles 1 - 4 can also be fixed on the front end face of the main body near the outer edge. The sector baffles are evenly spaced along the circumferential direction, and the sector baffles preferably correspond to the end disc tooth holder groups one by one. Each sector baffle shields a part of the end disc tooth holders near the tail end in the corresponding end disc tooth holder group, playing a protective role for this part of the end disc tooth holders, while the other part of the end disc tooth holders near the head end are located between two adjacent sector baffles. The sector baffles can be welded to the main body.

[0041] The present invention also discloses a drum of a shearer, which includes a drum body 2 and the grooved flat end plate. The grooved flat end plate is sleeved on the front end of the drum body and fixed by welding. End face teeth seats and end plate teeth seats are respectively installed with end face teeth and end plate teeth of corresponding specifications. The end face teeth form a convex curve type (see Figure 4 ) end face tooth group. From the front view, the deflection directions of all the end face teeth are arranged in the clockwise direction or the counterclockwise direction together, and the deflection directions of all the end plate teeth are arranged in the clockwise direction or the counterclockwise direction together.

[0042] Further, when the positions of the tooth tips of the end plate teeth and the end face teeth are superposed on the same radial plane after axial rotation, a curve protruding forward and outward will be enveloped (see Figure 4 ), and the more forward the curve protrudes at the edge of the flat end plate closer to the radial direction.

[0043] Behind the grooved flat end plate on the drum body are spiral blades and the tooth seats and pick teeth installed on the blades.

Claims

1. A grooved flat end plate, characterized in that: Its main body is a circular flat plate-like structural member. A circular groove is provided on the front end face of the main body. The bottom surface of the circular groove is a plane perpendicular to the axis of the main body. A plurality of end face tooth seat mounting positions are arranged along the circumferential direction in the circular groove. A plurality of reinforcing ribs distributed in a central radial shape are arranged in the circular groove. Both ends of each reinforcing rib are fixedly connected to the inner and outer side walls of the circular groove respectively. The reinforcing ribs divide the circular groove into a plurality of partitions. The end face tooth seat mounting positions are dispersedly arranged in these partitions. A plurality of end face tooth seat mounting positions are arranged in a single partition. The plurality of end face tooth seat mounting positions correspond to end face tooth seats of different specifications. The larger the specification of the end face tooth seat corresponding to the end face tooth seat mounting position, the farther it is from the axis of the main body, and the smaller the specification of the end face tooth seat corresponding to the end face tooth seat mounting position, the closer it is to the axis of the main body. A corresponding specification of end face tooth seat is installed on each end face tooth seat mounting position. A plurality of end plate tooth seat mounting positions are arranged at intervals along the circumference on the outer periphery of the main body. A corresponding specification of end plate tooth seat is installed on each end plate tooth seat mounting position. Corresponding specifications of end face teeth and end plate teeth are installed in the end face tooth seat and the end plate tooth seat respectively. When the positions of the tooth tips of the end plate teeth and the end face teeth are superposed in the same radial plane after axial rotation, a curve protruding forward and outward will be enveloped, and the more forward the curve protrudes at the position closer to the flat end plate edge in the radial direction.

2. The grooved flat end plate according to claim 1, wherein: The axis of the cutting tooth mounting hole of the end face tooth seat extends obliquely forward, and this axis is perpendicular to the shortest connection line from the corresponding end face tooth seat mounting position to the axis of the main body.

3. The grooved flat end disk according to claim 2, wherein: The axis of the cutting tooth mounting hole of the end plate tooth seat extends radially outward and forward. The axes of the cutting tooth mounting holes of all end plate tooth seats include at least three different extending directions, and the axis directions of any adjacent two end plate tooth seats are different.

4. The grooved flat end disc according to claim 3, wherein: All end plate tooth seats are divided into several end plate tooth seat groups arranged in sequence from head to tail. In each end plate tooth seat group, the angle between the axis direction of the cutting tooth mounting hole of the end plate tooth seat and the front end face of the main body becomes smaller in the arrangement order from the head end to the tail end.

5. The grooved flat end disk according to claim 4, characterized in that: A plurality of sector-shaped baffles are also fixed on the front end face of the main body. The sector-shaped baffles are evenly spaced along the circumferential direction. The sector-shaped baffles correspond to the end plate tooth seat groups one by one. Each sector-shaped baffle blocks a part of the end plate tooth seats close to the tail end in the corresponding end plate tooth seat group, and the other part of the end plate tooth seats close to the head end are located between two adjacent sector-shaped baffles.

6. A shearer drum, characterized in that: It includes a drum body and the grooved flat end plate according to claim 3, 4 or 5. The grooved flat end plate is sleeved on the front end of the drum body and fixed by welding.

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