CN112112645A - Ultra-thin coal seam strides connecting shaft type and combines to adopt supporting cutting part - Google Patents

Abstract

The invention provides a cutting part of a fully mechanized coal mining machine for an ultra-thin coal seam, which adopts an embedded cutting part in the whole structural form, a driving motor 1, a first-stage shaft gear 2, a first idle gear 3 and a first-stage large gear 4 of a transmission part of the cutting part 25 are distributed at the left end of a main body traction part 24, and power is transmitted from the traction part 24 to the cutting part 25 through a first spline shaft 5. The layout of the transmission system greatly reduces the overall dimension, and improves the possibility of realizing lifting of the cutting part when the cutting part is matched with fully mechanized mining of a working surface of an extremely thin coal seam. The clutch second spline shaft 7 is stretched through the clutch handle 8, so that the clutch second spline shaft 7 can be separated from the first spline shaft 5, the clutch is completed, and the cutting part is more convenient to overhaul. The external hanging type cooling plate 18 of the transfer station realizes the cooling of forced lubricating oil, and simultaneously can reduce the oil temperature in the gear cavity and prolong the service life of the shaft and the gear. The whole cutting part is compact in structural layout and relatively small in overall dimension, and is greatly beneficial to being matched with a fully mechanized mining face of an extremely thin coal seam.

Description

Ultra-thin coal seam strides connecting shaft type and combines to adopt supporting cutting part

Technical Field

The invention relates to a cross-connecting shaft type fully mechanized mining matched cutting part for an ultra-thin coal seam.

Background

Coal seams having a seam thickness below 1.3m are generally referred to as thin seams, and coal seams having a seam thickness below 0.8m are more generally referred to as very thin seams. The distribution of the thin coal layer in China is extremely wide, the coal quality is good, most of the coal is coking coal, and the heat productivity is large. The design of the mechanized equipment of the thin coal seam is always a difficult problem in the technical field of coal due to the limitation of geographical conditions, so that the fully mechanized mining equipment of the thin coal seam is slow in development and extremely low in mechanization degree. According to statistics, although the reserve of the thin coal seam in China accounts for more than 20% of the total reserve, the yield only accounts for about 3% of the total coal yield, and the working face of a plurality of extremely thin coal seams is forced to give up mining, so that people feel heartache.

At present, for an extremely thin coal seam with the thickness of less than 0.8m in China, a hydraulic traction bottom plate climbing coal mining machine is commonly used. Although the coal mining machine realizes the mechanized mining of the working face of the extremely thin coal seam, the coal mining machine is only the simplest mining mode, cannot form complete set of mechanized comprehensive mining, and has extremely low mining efficiency. The cutting part of the floor-climbing coal mining machine can not be lifted generally, so that the cutting part has poor adaptability and can only cut hard when an extremely thin coal seam meets complex geological conditions such as gangue, fault and the like, and the coal mining machine has great loss and sometimes even can not stop. The layout of the transmission system of the cutting part of the traditional coal mining machine is shown in fig. 2, the cutting part 27 and the traction part 26 of the traditional coal mining machine are two sets of independent transmission system components which are connected together through a pin shaft with a serial number 28, and no intersection exists in terms of the mechanical transmission system. Although traditional coal-winning machine cutting units can realize the lift of cutting units, receive the restriction of structure, cutting units overall dimension overlength, too big, and when traditional cutting units were applied to extremely thin seam working face empty roof apart from oversize, be unfavorable for the protection, make its exploitation that can't adapt to extremely thin seam. In addition, the cutting part of the extremely thin coal seam is limited by space and structure, the cooling of the inner part of the gear cavity is also a big problem, and because the cutting part of the extremely thin coal seam, particularly the cutting part of the extremely thin coal seam which needs to be fully mechanized, the overall size is small, and the influence of the strength on the gear, the shaft and the like cannot be reduced, the cooling device cannot be arranged in the gear cavity, and the integral strength of the shell can be influenced by the cooling water channel arranged on the shell of the cutting part. Therefore, in order to realize fully mechanized mining matching of the extremely thin coal seam, a novel cutting part design is very important.

Disclosure of Invention

The invention aims to provide a cross-connecting shaft type fully-mechanized mining matched cutting part of an extremely-thin coal seam, which has high power and extremely-short length, can be lifted and is suitable for mining on a fully-mechanized mining working surface of the extremely-thin coal seam. The technical scheme of the invention is as follows: a supporting cutting part of full-mechanized mining of ultra-thin coal seam crossing connection shaft type, a main machine body traction part 24 of a coal mining machine is hinged with a cutting part 25 through a hinge pin shaft 6, a driving motor 1 and a first-stage shaft gear 2, a first idler gear 3 and a first-stage large gear 4 of the cutting part 25 are positioned at the left end of the main body traction part 24, the driving motor 1 on the traction part 24 is fixedly connected with the first-stage shaft gear 2 through a spline, the first-stage shaft gear 2 is meshed with a first-stage large gear 4 through the first idler gear 3, the first-stage large gear 4 is connected with a first spline shaft 5 through a spline, the first spline shaft 5 is connected with one end of a clutch second spline shaft 7 through a spline, the other end of the clutch second spline shaft 7 is fixedly connected with a reduction pinion gear 9 through an internal spline, the reduction pinion 9 is meshed with a third idler gear 11 through a second idler gear 10, the third idler gear 11 is meshed with a tail-, the tail end large gear 13 transmits power to a central gear 14 of a planetary mechanism through a spline, the central gear 14 transmits the power to a planet carrier 15 through gear meshing, the planet carrier 15 is fixedly connected with a roller connecting sleeve 16 through the spline, the roller connecting sleeve 16 is connected with a roller 17 through a bolt, the power is output through the roller 17, an externally hung cooling plate 18 is connected with a cutting part 25 through a first connector 19 and a second connector 20, a fourth connector 22 is connected with a fifth connector 23, and the fifth connector 23 is connected with a spraying pipeline 29 in a roller shaft.

The integral structure form of the cutting part adopts an embedded cutting part structure mode, wherein a clutch handle 8 is arranged on the clutch second spline shaft 7 of the cutting part 25, and the clutch second spline shaft 7 is separated from the first spline shaft 5 by stretching the clutch handle 8 to complete the clutch.

The working principle of the invention is as follows:

the cutting part adopts an embedded structure. Compare traditional cutting units overall structure, embedded cutting units has greatly solved the protection problem of extremely thin seam accuse top distance. In order to be suitable for mining of an extremely thin coal seam, the cutting part needs to be lifted within a certain range, and the length of the cutting part needs to be short. Traditional coal-winning machine cutting units receives the restriction of transmission structure because of certain back of cutting power, and overall dimension has hardly made the breakthrough basically, if want further to shorten cutting units length, can only make the change on transmission structure. The mechanical gear transmission layout of the cutting part is changed, the first-stage speed reduction transmission gear is placed on the main body of the coal mining machine, power is transmitted to the cutting part gear through a connecting shaft which is drawn and hinged with cutting, and finally, the final cutting torque is transmitted to the roller through the straight-tooth transmission mechanism and the planetary transmission mechanism, so that the cutting part provided by the invention has the smallest external dimension on the premise of ensuring that the cutting power is large enough and the strength meets the design requirement. In addition, most of the traditional cutting part clutch mechanisms are arranged at the cutting motor, and the cutting part clutch mechanism skillfully utilizes the space between the end faces of the articulated shafts of the traction part and the cutting part, so that the cutting part is driven and the primary speed reduction transmission on the traction part is driven to complete the clutch through the clutch spline shaft, and the maintenance of the cutting part is facilitated. The invention is also provided with a unique lubricating and cooling system, the cutting part cooling is always the design difficulty of the cutting part matched with the fully mechanized mining of the ultra-thin coal seam, because the overall dimension of the cutting part matched with the fully mechanized mining of the ultra-thin coal seam is very small, and the overall dimension of main transmission parts such as gears, shafts, bearings and the like cannot be reduced due to the influence of the strength, most of the oil temperature in a gear cavity of the cutting part of the ultra-thin coal seam mining machine is higher, but no large space is used as a cooling water pipe, and the strength of the shell can be damaged by the way of cooling the water channel at the shell of the cutting part. Therefore, the lubricating oil to be cooled must be led out of the cutting part in an external leading mode, and then is connected into the cutting part after passing through the cooling device.

The invention has the beneficial effects that:

the cutting part of the invention is different from the structural layout of the cutting part transmission system of the traditional coal mining machine, the whole transmission system is not placed in the cutting part, but the driving motor 1, the first-stage shaft gear 2, the first idle gear 3 and the first-stage large gear 4 of the transmission part of the cutting part 25 are arranged at the left end of the main body traction part 24, and the power is transmitted from the traction part 24 to the cutting part 25 through the first spline shaft 5. The structural layout of the transmission system breaks through the structural form of the traditional cutting part, and the overall dimension of the cutting part is greatly reduced, so that the cutting part can be normally lifted in the matching of the fully mechanized mining working surface of the ultra-thin coal seam, and the mining efficiency of the ultra-thin coal seam is improved.

The clutch system of the invention is different from the traditional clutch mechanism of the cutting part of the ultra-thin coal seam mining machine. The traditional cutting part of the ultra-thin coal seam mining machine is limited by the space size, and a clutch device of a cutting motor is mostly used for realizing the clutch of a transmission system of the cutting part. In the invention, the clutch second spline shaft 7 is fixedly connected with the clutch handle 8 through a bearing and a nut, the clutch handle 8 can be stretched outwards in the operation side direction, so that an internal spline of the clutch second spline shaft 7 is separated from the first spline shaft 5, and the driving torque of the cutting part cannot be continuously transmitted on the cutting part.

The invention provides a cross-connecting shaft type fully-mechanized mining matched cutting part of an extremely-thin coal seam: traditional cutting units, especially extremely sensitive extremely thin coal seam of overall dimension combine to adopt supporting cutting units, and the cooling method in its gear chamber receives overall dimension's restriction, utilizes the method of cutting units casing processing cooling water course mostly, realizes the cooling in gear chamber. Most of the cutting part shells are limited in geometric dimension, the thicknesses of the shells are thin, the processing difficulty of a water channel is high, the cost is high, stress concentration points are easy to generate, and the strength of the shells is damaged. The lubricating oil in the gear cavity is led out through the externally-hung cooling plate 18 of the transfer station and is injected into the gear cavity after the externally-hung cooling plate 18 is cooled, so that the cooling of the lubricating oil in the gear cavity is realized, and the cooled cooling water can be connected with the spray pipeline 29 in the roller shaft through the fifth joint 23, so that the spray function of the coal mining machine is realized. The mode not only meets the cooling requirement in the gear cavity of the cutting part of the ultra-thin coal seam, prolongs the service life of the shaft and the gear, but also has lower cost and convenient maintenance.

In conclusion, the cutting part provided by the invention has a compact structure and an ingenious layout, can be well suitable for fully-mechanized mining matching of a working surface of an extremely-thin coal seam, completes coal dropping and propelling tasks, greatly improves the automation degree of the extremely-thin coal seam, reduces resource waste and increases social benefits.

Drawings

FIG. 1 is a schematic view of the structural arrangement of the cutting part of the fully mechanized coal mining machine for ultra-thin coal seams

FIG. 2 is a schematic view of a transmission system of a cutting part of a conventional coal mining machine

FIG. 3 is a schematic view of a mechanical transmission system of a cutting part of a coal mining machine according to the present invention

FIG. 4 is a schematic view of a lubricating and cooling structure of a cutting part of a coal mining machine according to the present invention

Detailed Description

As shown in figure 1, a cross-connecting shaft type fully-mechanized coal mining matched cutting part for an ultra-thin coal seam, a driving motor 1 on a traction part 24 is fixedly connected with a first-stage shaft gear 2 through a spline, the first-stage shaft gear 2 is meshed with a first-stage large gear 4 through a first idle gear 3, the first-stage large gear 4 is connected with a first spline shaft 5 through a spline, the first spline shaft 5 is connected with one end of a clutch second spline shaft 7 through a spline, the other end of the clutch second spline shaft 7 is fixedly connected with a reduction pinion 9 through an internal spline, the reduction pinion 9 is meshed with a third idle gear 11 through a second idle gear 10, the third idle gear 11 is meshed with a tail-end large gear 13 through a fourth idle gear 12, the tail-end large gear 13 transmits power to a central gear 14 of a planetary mechanism through a spline, the central gear 14 transmits power to a planet carrier 15 through gear meshing, the planet carrier 15 is fixedly connected with a, the roller connecting sleeve 16 is connected with the roller 17 through a bolt, power is output through the roller 17, as shown in fig. 4, the externally hung cooling plate 18 is connected with the cutting part 25 through a first connector 19 and a second connector 20, so that lubricating oil in the cutting part 25 circulates in the externally hung cooling plate 18, the third connector 21 is externally connected with cooling water, the fourth connector 22 is connected with the fifth connector 23, and the fifth connector 23 is connected with the spray pipeline 29 in the roller shaft.

As shown in fig. 3, the clutch handle 8 is installed on the clutch second spline shaft 7 of the cutting part 25, the second spline shaft 7 is engaged with the first spline shaft 5, the clutch second spline shaft 7 is located outside the first spline shaft 5, the first spline shaft 5 is located inside the hinge pin 6 of the traction part 24 and the cutting part 25, and the clutch handle 8 is stretched to separate the clutch second spline shaft 7 from the first spline shaft 5 to complete the clutch.

Claims (2)

1. The utility model provides a complete cutting units of full-mechanized mining of connecting shaft type is striden to extremely thin coal seam, characterized by: a traction part (24) of a main machine body of the coal mining machine is hinged with a cutting part (25) through a hinge pin shaft (6), a driving motor (1) and a first-stage shaft gear (2) of the cutting part (25), a first idler gear (3) and a first-stage large gear (4) are positioned at the left end of the traction part (24) of the main machine body, the driving motor (1) on the traction part (24) is fixedly connected with the first-stage shaft gear (2) through a spline, the first-stage shaft gear (2) is meshed with the first-stage large gear (4) through the first idler gear (3), the first-stage large gear (4) is connected with a first spline shaft (5) through a spline, the first spline shaft (5) is connected with one end of a clutch second spline shaft (7) through a spline, the other end of the clutch second spline shaft (7) is fixedly connected with a reduction pinion (9) through an internal spline, the reduction pinion (9) is meshed with a third idler gear (11) through a second idler gear (, third idler (11) are engaged with terminal gear wheel (13) through fourth idler (12), terminal gear wheel (13) transmit power to centre wheel (14) of planetary mechanism through the spline, centre wheel (14) transmit power to planet carrier (15) through gear engagement, planet carrier (15) are through spline and cylinder adapter sleeve (16) fixed connection, cylinder adapter sleeve (16) are through bolted connection cylinder (17), export power through cylinder (17), outer hanging cooling plate (18) are connected with cutting part (25) through first interface (19) and second interface (20), fourth interface (22) are connected with fifth interface (23), fifth interface (23) are connected with spray pipe (29) in the cylinder axle.

2. The ultra-thin coal seam crossing connecting shaft type fully-mechanized mining matched cutting part of claim 1, which is characterized in that: the integral structure form of the cutting part adopts an embedded cutting part structure mode, wherein a clutch handle (8) is arranged on the clutch second spline shaft (7) of the cutting part (25), and the clutch second spline shaft (7) is separated from the first spline shaft (5) by stretching the clutch handle (8) to complete the clutch.

Images