CN217206435U - H-shaped cutting device and high-power thin coal seam coal mining machine - Google Patents

Abstract

The utility model relates to an h type cutting device and high-power thin coal seam coal-winning machine, h type cutting device includes the box and installs the cutting motor and the cutting transmission system in the box, the cutting transmission system includes first to seventh gear shaft group and the planet reduction gears that connect in proper order the transmission, the power take off end of cutting motor points to the rear, and with first gear shaft group coaxial coupling, the output of seventh gear shaft group points to the place ahead, and with planet reduction gears's sun gear coaxial coupling, the front portion of cutting motor and the box part at place overhang forward surpass the front end of third to seventh gear shaft group, and in the left and right direction with planet reduction gears interval setting side by side; the h-shaped cutting device is adopted by both the left cutting device and the right cutting device of the high-power thin coal seam mining machine. The utility model discloses can solve the contradiction between thin seam coal-winning machine face height, installed power, cross coal space and complete machine adaptability and the stability, improve the adaptability of coal-winning machine and the mining efficiency in thin seam.

Description

H-shaped cutting device and high-power thin coal seam coal mining machine

Technical Field

The utility model relates to a coal-winning machine of cutting device and applied this cutting device suitable for thin seam coal-winning machine belongs to coal mining machinery technical field.

Background

The existing double-drum thin coal seam coal mining machine at home and abroad generally has two structural forms: one is a coal mining machine in a conventional arrangement mode, and the other is a coal mining machine in a bottom plate climbing arrangement mode. The former structural style is difficult to guarantee the great coal space of crossing and dispose great cutting power, and the latter structural style though can guarantee great coal space of crossing and dispose great cutting power, nevertheless because its auxiliary stay piston shoes act on the bottom plate top, has influenced the normal meshing of coal-winning machine traveling system and round pin rail, and is required highly to the bottom plate, if the bottom plate is too soft or undulate too big, can lead to coal-winning machine complete machine adaptability to deteriorate.

The existing thin coal seam coal mining machines with the two structural forms cannot effectively solve the contradiction between the machine face height, the installed power, the coal passing space and the adaptability and the stability of the whole machine due to the limitation of the structure of the whole machine. According to the conventional transversely-arranged cutting device of the coal mining machine, the cutting motor is arranged above the middle groove of the scraper conveyor, the power of the motor is larger, the diameter of the motor is larger, the size of the cutting motor directly influences the height of the machine face and the coal passing space, and the improvement of the cutting power of the coal mining machine in a thin coal seam is restricted. In summary, a new overall structural form and cutting device of a thin seam coal mining machine are urgently needed to meet mining requirements of a complex thin seam working face.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an h type cutting device and high-power thin seam coal cutter to solve the contradiction between thin seam coal cutter machine face height, installed power, cross coal space and complete machine adaptability and the stability, improve the adaptability of coal cutter and the mining efficiency in thin seam, satisfy the exploitation demand of complicated thin seam working face.

The utility model discloses a main technical scheme has:

the utility model provides an h type cutting device, includes the box and installs cutting motor and cutting transmission system in the box, cutting transmission system is including the first gear shaft group, second gear shaft group, third gear shaft group, fourth gear shaft group, fifth gear shaft group, sixth gear shaft group, seventh gear shaft group and the planet reduction gears of transmission connection in proper order, the power take off of cutting motor points to the rear to with first gear shaft group coaxial coupling, the directional place ahead of output of seventh gear shaft group to with planet reduction gears's sun gear coaxial coupling, the anterior of cutting motor and the box part at place overhang forward surpass the front end of third to seventh gear shaft group to set up with planet reduction gears at the interval side by side in the left and right directions, clutching mechanism installs the output at the cutting motor.

And the rotor of the cutting motor is connected with the first gear shaft group through a slender torque shaft.

The third gear shaft group can comprise a mining side large gear and a coal wall side shaft gear, the mining side large gear is connected with the coal wall side shaft gear through a long spline shaft and a coaxial spline, the mining side large gear is externally meshed with an idler gear of the second gear shaft group, the fourth gear shaft group comprises a large gear and a shaft gear, the large gear is sleeved on the shaft gear and is connected with the shaft gear through a spline, the coal wall side shaft gear is externally meshed with a large gear of the fourth gear shaft group, and the shaft gear of the fourth gear shaft group is externally meshed with an idler gear of the fifth gear shaft group.

An oil storage cavity is arranged at the position, located on the third gear shaft group, in the box body.

The spline end of the sun gear of the planetary reduction mechanism is connected with the internal spline of the big gear of the seventh gear shaft group, the planet carrier of the planetary reduction mechanism is connected with the square connecting sleeve used for installing the roller through the spline, and the dynamic seal of the square connecting sleeve is realized by arranging the floating oil seal.

The automatic spray cooling device is characterized in that a low-pressure cooling water channel and a high-pressure cooling water channel which are not communicated with each other are preferably arranged in the solid structure of the wall of the box body, a nozzle is further arranged on the shell of the box body, an inlet of the nozzle is communicated with the low-pressure cooling water channel, the high-pressure cooling water channel is communicated with a cooling water channel on the big end cover of the seventh gear shaft group, the cooling water channel on the big end cover is communicated with the rear end of a spray cooling water pipe penetrating through the center of the seventh gear shaft group, and the front end of the spray cooling water pipe is communicated with an inlet of the nozzle on the roller.

The cutting transmission system is characterized in that the shaft axes of the cutting transmission system are sequentially arranged in the left-right direction according to a transmission sequence, and are arranged in a zigzag mode with staggered heights, wherein the central axis of the second gear shaft group is 20mm higher than the central axis of the first gear shaft group, the central axes of the second gear shaft group to the fifth gear shaft group are equal in height, the central axis of the sixth gear shaft group is 20mm lower than the central axis of the fifth gear shaft group, the central axis of the seventh gear shaft group is lower than the central axis of the sixth gear shaft group, and the included angle between the plane of the seventh gear shaft group and the plane of the sixth gear shaft group is 25 degrees relative to the horizontal plane.

The utility model provides a high-power thin seam coal mining machine, its left cutting device and right cutting device all adopt above-mentioned h type cutting device, and left cutting device and right cutting device bilateral symmetry arrange are in the left and right sides of fuselage to draw the running gear with a left side respectively and draw the running gear with the right side and pull the running gear articulated, the fuselage is drawn running gear, electrical control box and the right side by a left side and is drawn the running gear and draw two liang of fixed constitutions from the left side to the right side, and a left side, the right side is drawn the running gear and is adopted hydraulic bolt hookup and cylindric lock location between the electrical control box separately, and interchangeability about each spare part of all the other inside except the box has in the left and right cutting device.

The walking wheel in the left traction walking part and the right traction walking part and the traction output shaft are designed into an integral structure, and the walking wheel adopts a double-support structure at two ends.

The main cable and the traction cable of the coal mining machine are integrated into a cable, and cable cores in the cable are horizontally arranged side by side.

The utility model has the advantages that:

the utility model provides an h type cutting device, cutting motor wherein adopts half to hang the arrangement mode, and under three-machine fit-up state, cutting motor is located scraper conveyor's coal wall side groove group top and the outside, arranges at the homonymy with planet reduction gears, partly hangs in the side on the left and right sides of cylinder. Compared with the cutting device with the existing structure, the cutting motor is positioned above the middle groove of the scraper conveyor, the coal wall side space can be fully utilized, the influence of the large-diameter cutting motor on the height of the machine face is avoided, the coal passing space above the middle groove is released simultaneously, and therefore the cutting device can be configured with the cutting motor with higher power, and the high-power requirement is met.

The cutting motor barrel can serve as a coal baffle plate, so that the roller can be repeatedly charged with coal, the coal charging effect is greatly improved, and the problem of poor coal charging effect of the small-diameter roller of the thin seam coal mining machine is solved.

The utility model provides a novel complete machine arrangement structure of high-power thin coal seam coal-winning machine, this coal-winning machine adopt normal fuselage + h type cutting device's brand-new complete machine arrangement structure, and the primary structure spare is arranged in the top of scraper conveyor, is equipped with h type cutting device. Compared with a coal wall side supporting device adopted by a coal mining machine adopting a bottom plate climbing arrangement mode, the structure has the advantages that the supporting sliding shoes are still arranged on the shovel plate, the center of gravity of the whole machine is located above the middle groove of the scraper conveyor, the stability is ensured, the adaptability of the thin coal seam coal mining machine is greatly improved, and the contradiction among the installed power, the machine face height and the coal passing space is effectively solved.

Drawings

Fig. 1 is a front view of an embodiment of the h-type cutting device (left cutting device) of the present invention;

FIG. 2 is a cross-sectional view of the embodiment of FIG. 1;

FIG. 3 is a top view of an embodiment of the high power low seam shearer;

FIG. 4 is a front view of the embodiment shown in FIG. 3;

fig. 5 is a side cross-sectional view of the embodiment of fig. 3.

Reference numerals:

1. the automatic cutting machine comprises a first gear shaft group, a clutch mechanism, a second gear shaft group, a third gear shaft group, a fourth gear shaft group, a fifth gear shaft group, a sixth gear shaft group, a seventh gear shaft group, a planetary speed reducing mechanism, a spray cooling water pipe, a box body, a cutting motor, a left roller, a left cutting device, a left traction walking part, an electric control box, a hydraulic heightening pump station, a right traction walking part, a right cutting device, a right roller and a scraper conveyer, wherein the first gear shaft group, the second gear shaft group, the third gear shaft group, the fourth gear shaft group, the fifth gear shaft group, the sixth gear shaft group, the seventh gear shaft group, the 9 planetary speed reducing mechanism, the spray cooling water pipe, the box body, the 12, the cutting motor, the left roller, the left cutting device, the left traction walking part, the 15, the electric control box, the 17, the hydraulic heightening pump station, the right traction walking part, the right cutting device, the 20, and the scraper conveyer.

Detailed Description

The utility model discloses an h type cutting device, as shown in fig. 1, 2, 5, include box 11 and install the cut motor 12 and the cut transmission system in the box, the cut transmission system is including the first gear shaft group 1, second gear shaft group 3, third gear shaft group 4, fourth gear shaft group 5, fifth gear shaft group 6, sixth gear shaft group 7, seventh gear shaft group 8 and the planet reduction gears 9 that the transmission connects in proper order. And the power output end of the cutting motor points to the rear and is coaxially connected with the first gear shaft group. The output end of the seventh gear shaft group points to the front and is coaxially connected with the sun gear of the planetary reduction mechanism. The front part of the cutting motor and the box body part of the cutting motor forwards overhang beyond the front ends of the third to seventh gear shaft groups and are arranged side by side with the planetary reduction mechanism at intervals in the left-right direction, and the rear ends of the first to third gear shaft groups backwards exceed the rear ends of the fourth to seventh gear shaft groups, so that the whole cutting device is in an approximate h shape, and the cutting device with the structure is called as an h-shaped cutting device. This arrangement of the cutting motor may be referred to as a semi-suspended arrangement. In a state where the shearer with the h-type cutting device is installed in cooperation with the scraper conveyor, the cutting motors are located above and outside the coal wall side ledge of the scraper conveyor (i.e., on the side of the coal wall outside the scraper conveyor) (see fig. 5). The clutch mechanism 2 is arranged at the output end of the cutting motor and is matched with the first gear shaft group to complete the on-off operation.

The rotor of the cutting motor is connected with the first gear shaft group through a slender torque shaft (also called a flexible shaft). The two ends of the flexible shaft can be connected with the rotor of the cutting motor and the first gear shaft group through splines. Power is transmitted from the cutting motor to the first gear shaft group through the flexible shaft.

The third gear shaft group comprises a mining side gearwheel and a coal wall side shaft gear, and the mining side gearwheel and the coal wall side shaft gear are respectively rotatably supported in the box body through two groups of bearings. The large gear at the mining side is connected with the coaxial spline of the shaft gear at the coal wall side through the long spline shaft. The large gear on the mining side is externally meshed with an idler gear of the second gear shaft group. The second gear shaft group transmits power to the mining side large gear, and the mining side large gear transmits power to the coal wall side shaft gear through the long spline shaft.

The fourth gear shaft group comprises a large gear and a shaft gear, and the shaft gear is rotatably supported in the box body through two groups of bearings positioned at two ends of the shaft gear. The big gear is sleeved on the shaft gear and is connected with the shaft gear through a spline. The shaft gear is matched with the corresponding holes of the large gear through cylindrical surfaces at two ends of the spline of the shaft gear to perform radial centering on the large gear, so that the stability of spline connection is enhanced. The shaft gear on the coal wall side is externally meshed with a large gear of a fourth gear shaft group, and the shaft gear of the fourth gear shaft group is externally meshed with an idle gear of a fifth shaft group. The fifth and sixth gear shaft sets are two identical idler assemblies.

The position, located third gear shaft group in the box, sets up an oil storage chamber C chamber (see fig. 2), can guarantee that fluid has enough big circulation space to carry out abundant heat exchange, promotes the fluid circulation, improves heat dispersion, makes the cutting apparatus temperature reach thermal balance fast.

The final stage of the cutting transmission system adopts a planetary speed reducing mechanism, so that lower output rotating speed and larger output torque can be obtained. The planetary reduction mechanism adopts a transmission form of four planetary gears and mainly comprises a sun gear, the planetary gears, an inner gear ring, a planetary carrier, a bearing seat, a supporting bearing, a planar floating oil seal device, a square connecting sleeve and the like. The spline end of the sun gear of the planetary reduction mechanism is connected with the internal spline of the big gear of the seventh gear shaft group, power is transmitted to the planetary reduction mechanism from the seventh gear shaft group, when the sun gear rotates, the planet gear is driven to rotate along the axis of the sun gear, the planet carrier is driven to rotate around the axis of the sun gear, the planet carrier of the planetary reduction mechanism is connected with the square connecting sleeve for mounting the roller through the spline, and torque is output to the roller. Because the planet reducing mechanism adopts a sun gear floating structure, the floating is sensitive, the counter torque is small, the floating amount is controlled by an external spline backlash matched with the big gear, and the uniform load among planet gears is ensured. The movable seal of the square connecting sleeve is realized through the floating oil seal, the structure can adapt to the axial movement of the planetary speed reducing mechanism, and the long-time working under the severe working condition with coal dust can be realized.

And a low-pressure cooling water channel and a high-pressure cooling water channel which are separated from each other and are not communicated with each other are also arranged in the solid structure of the wall of the box body and respectively correspond to the water inlet A and the water inlet B in the figure 2. The shell of the box body is also provided with a nozzle, the inlet of the nozzle is communicated with the low-pressure cooling water channel, and the cooling water in the low-pressure cooling water channel is sprayed out from the nozzle after cooling the box body and is used for external spray cooling. The high-pressure cooling water channel is communicated with a cooling water channel on a large end cover of the seventh gear shaft group, the cooling water channel on the large end cover is communicated with the rear end of a spray cooling water pipe 10 passing through the center of the seventh gear shaft group, the front end of the spray cooling water pipe is communicated with an inlet of a nozzle on the roller, and cooling water entering a water inlet B sequentially passes through a box body shell, the large end cover of the seventh gear shaft group and the spray cooling water pipe and then is sprayed out from the nozzle on the roller for internal spray dust reduction.

As shown in fig. 1, if the case is described as a case where the middle part of the case is horizontal, the axes of the cutting transmission system of the cutting device are sequentially arranged in the left-right direction according to the transmission sequence, and the axes are also arranged in a zigzag manner. In this embodiment, the central axis of the second gear shaft group is 20mm higher than the central axis of the first gear shaft group, the central axes of the second to fifth gear shaft groups are equal in height, the central axis of the sixth gear shaft group is 20mm lower than the central axis of the fifth gear shaft group, the central axis of the seventh gear shaft group is 20mm lower than the central axis of the sixth gear shaft group, and the included angle between the plane formed by the central axis of the seventh gear shaft group and the central axis of the sixth gear shaft group and the horizontal plane is 25 degrees. The design can take the sole-laying amount and the top-lifting amount of the cutting device into consideration, and the adaptability of the cutting device is improved.

As shown in fig. 3-5, the utility model also discloses a high-power thin seam coal mining machine, including left drum 13, left cutting device 14, left traction walking part 15, electrical control box 16, hydraulic power unit 17, right traction walking part 18, right cutting device 19 and right drum 20. Left cutting device and right cutting device all adopt above-mentioned h type cutting device, and left cutting device and right cutting device bilateral symmetry arrange in the left and right sides of fuselage to draw the running gear with the left side respectively and draw the running gear articulated with the right side, and change pivot angle and height position under the telescopic action of left and right heightening hydro-cylinder respectively.

The left traction walking part, the electrical control box and the right traction walking part are sequentially arranged side by side from left to right, the left traction walking part and the right traction walking part are respectively connected with the electrical control box through hydraulic bolts and positioned through cylindrical pins, and the left traction walking part, the electrical control box and the right traction walking part form a three-section machine body of the coal mining machine. The high-power thin seam coal mining machine is controlled by adopting airborne variable frequency speed regulation, and the variable frequency device and the transformer are arranged in the electric control box. The whole machine of the high-power thin seam coal mining machine adopts a normal machine body structure of a riding scraper conveyor 21, and main structural members of the machine body are normally arranged above a middle groove of the scraper conveyor. The cutting transmission system A is positioned above the coal wall side ledge of the scraper conveyor, and the cutting motor B is semi-suspended outside the coal wall side ledge of the scraper conveyor. The cutting motor B and the cutting transmission system A do not influence the height of the machine face and the coal passing space. The barrel of the cutting motor B (mainly the box body part where the front part of the cutting motor is) can be used as a coal baffle plate, so that the roller can be repeatedly charged with coal, and the coal charging effect of the roller is improved.

The traction walking part comprises a traction transmission system C and a traction motor D, and the traction transmission system C comprises a three-stage straight gear and a one-stage planetary transmission mechanism. And a hydraulic heightening pump station 17 is arranged in the right traction walking part and used for driving the heightening oil cylinder to stretch and realize the lifting of the left cutting device and the right cutting device. And the traction motor D, the traction transmission system C and the hydraulic height-adjusting pump station are all positioned above the middle groove of the scraper conveyor.

The walking wheels in the left traction walking part and the right traction walking part and the traction output shaft are preferably of an integral structure, so that the walking wheels can be smaller in size, and the height of a machine face is reduced. Simultaneously, the walking wheel is preferred to be adopted both ends dual bracing structure, specifically can be in walking wheel both sides respectively install a set of self-aligning roller bearing, compares in cantilever type bearing structure, and the walking wheel atress is more balanced, and the reliability is higher.

The cable of the coal mining machine is in a flat design, specifically, a main cable and a traction cable of the coal mining machine are integrated into one cable, core wires of all cables in the cable are horizontally arranged side by side, the thickness and the bending radius of the cable are reduced, and the problem that the towing cable is too high when the height of a machine face is low is solved.

Except the box body, other internal parts of the left cutting device and the right cutting device can be interchanged.

Under the condition that the high-power thin coal seam coal mining machine participates in the cooperation of three machines, a novel whole machine arrangement structure of the coal mining machine is further formed. The main structural parts of the high-power thin coal seam mining machine are arranged above the scraper conveyor, and the cutting motor of the h-shaped cutting device is positioned above the coal wall side ledge of the scraper conveyor and partially protrudes out of the coal wall side ledge. The supporting sliding shoes of the coal mining machine are still arranged on the shovel plate of the scraper conveyor, the gravity center of the whole machine is located above the middle groove of the scraper conveyor, and compared with a bottom plate climbing arrangement mode, the supporting sliding shoes of the coal mining machine greatly improve the adaptability of the thin coal seam coal mining machine while ensuring the stability, and effectively solve the contradiction among the installed power, the machine face height and the coal passing space.

The terms front and rear herein refer to a direction close to the coal wall side and a direction away from the coal wall side, respectively.

Claims (10)

1. The utility model provides an h type cutting means which characterized in that: the cutting motor and the cutting transmission system are installed in the box body, the cutting transmission system comprises a first gear shaft group, a second gear shaft group, a third gear shaft group, a fourth gear shaft group, a fifth gear shaft group, a sixth gear shaft group, a seventh gear shaft group and a planetary reduction mechanism which are sequentially connected in a transmission mode, the power output end of the cutting motor points to the rear side and is coaxially connected with the first gear shaft group, the output end of the seventh gear shaft group points to the front side and is coaxially connected with a sun wheel of the planetary reduction mechanism, the front portion of the cutting motor and the box body portion where the cutting motor is located overhang forwards and exceed the front ends of the third gear shaft group to the seventh gear shaft group, the front portion and the box body portion where the cutting motor is located are arranged in parallel to the planetary reduction mechanism in the left-right direction at intervals, and the clutch mechanism is installed at the output end of the cutting motor.

2. H-shaped cutting device according to claim 1, characterized in that: and the rotor of the cutting motor is connected with the first gear shaft group through a slender torque shaft.

3. H-shaped cutting device according to claim 2, characterized in that: the third gear shaft group comprises a mining side large gear and a coal wall side shaft gear, the mining side large gear is connected with the coal wall side shaft gear through a long spline shaft and a coaxial spline, the mining side large gear is externally meshed with an idler gear of the second gear shaft group, the fourth gear shaft group comprises a large gear and a shaft gear, the large gear is sleeved on the shaft gear and is connected with the shaft gear through a spline, the coal wall side shaft gear is externally meshed with the large gear of the fourth gear shaft group, and the shaft gear of the fourth gear shaft group is externally meshed with the idler gear of the fifth gear shaft group.

4. H-shaped cutting device according to claim 3, characterized in that: an oil storage cavity is arranged at the position, located on the third gear shaft group, in the box body.

5. H-shaped cutting device according to claim 4, characterized in that: the spline end of the sun gear of the planetary reduction mechanism is connected with the internal spline of the big gear of the seventh gear shaft group, the planet carrier of the planetary reduction mechanism is connected with the square connecting sleeve used for installing the roller through the spline, and the dynamic seal of the square connecting sleeve is realized by arranging the floating oil seal.

6. H-shaped cutting means according to claim 5, characterized in that: the spray cooling water pipe is characterized in that a low-pressure cooling water channel and a high-pressure cooling water channel which are not communicated with each other are arranged in a solid structure of the wall of the box body, a nozzle is further arranged on an outer shell of the box body, an inlet of the nozzle is communicated with the low-pressure cooling water channel, the high-pressure cooling water channel is communicated with a cooling water channel on a big end cover of the seventh gear shaft group, the cooling water channel on the big end cover is communicated with the rear end of the spray cooling water pipe penetrating through the center of the seventh gear shaft group, and the front end of the spray cooling water pipe is communicated with an inlet of the nozzle on the roller.

7. H-shaped cutting means according to claim 1, 2, 3, 4, 5 or 6, characterized in that: the axes of the shafts of the cutting transmission system are sequentially arranged in the left-right direction according to the transmission sequence, and are also arranged in a zigzag manner, wherein the central axis of the second gear shaft group is 20mm higher than that of the first gear shaft group, the central axes of the second to fifth gear shaft groups are equal in height, the central axis of the sixth gear shaft group is 20mm lower than that of the fifth gear shaft group, the central axis of the seventh gear shaft group is lower than that of the sixth gear shaft group, and the included angle of the plane of the seventh gear shaft group and the plane of the sixth gear shaft group relative to the horizontal plane is 25 degrees.

8. A high-power thin coal seam coal mining machine is characterized in that: the left cutting device and the right cutting device are both the h-type cutting device as claimed in any one of claims 1 to 7, the left cutting device and the right cutting device are symmetrically arranged on the left side and the right side of the machine body and are respectively hinged with the left traction walking part and the right traction walking part, the machine body is formed by fixing the left traction walking part, the electrical control box and the right traction walking part in pairs from left to right, the left traction walking part and the right traction walking part are respectively connected with the electrical control box through hydraulic bolts and positioned through cylindrical pins, and all the other internal parts except the box body in the left cutting device and the right cutting device have left-right interchangeability.

9. The high power thin seam shearer of claim 8, wherein: the walking wheel that the walking portion was pull in the walking portion and the right side is pull in the walking portion and is the integral structure with the output shaft design of pulling, and the walking wheel adopts both ends dual bearing structure.

10. The high power thin seam shearer of claim 9, wherein: the main cable and the traction cable of the coal mining machine are integrated into a cable, and cable cores in the cable are horizontally arranged side by side.

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