41results about How to "Improve coal loading effect" patented technology

A double-motor U-shaped cutting portion of a thin seam mining machine comprises a rocker arm casing, two cutting motors, a rocker arm reduction gearbox and a cutting roller. A motor installing cavity of the rocker arm casing and an extending end of the rocker arm casing are on the same side, and the contour of the motor installing cavity and the contour of extending end of the rocker arm casing are in a U shape, and the extending end of the rocker arm casing is elongated. The rocker arm reduction gearbox comprises a clutch, a third-stage idle gear, a fourth-stage cylindrical gear and a planetary gear mechanism, the clutch is arranged on a third-stage cutting shaft group of a transmission chain, the planetary gear mechanism is arranged at the tail end of the transmission chain, the two cutting motors transmit power to the rocker arm reduction gearbox through a first idle gear and a second idle gear, the power is transmitted to the cutting roller after speed reduction through the fourth-stage cylindrical gear and the planetary gear mechanism, an involute spline of the third-stage cutting shaft group of the transmission chain is disconnected by pulling a clutch handle, and the transmission chain is cut off so as to avoid accidents during overhaul. The cutting portion is large in installed power, strong in mining capability, good in coal charging effect, safe and reliable, and a large cutting deep roller can be installed to develop a hard-coal working surface.

The invention discloses a high-speed cutting longwall-mining method for low coal seams and medium-thickness coal seams. The cutting resistance is reduced by reducing a web, so that a normal coal cutting speed reaches 15-40 m/min; by using a low-web bidirectional high-speed coal cutting process for left triangular coals, after triangular coals are completely cut, returning to cut the other half of triangular coals is not required, but continuing to carry out ascending (descending) coal cutting is performed; and reciprocating mining is performed in such a way. By adopting the spaced quick moving of brackets, every two circulating brackets move at a synchronized interval. Through the timing optimization of production takts, by using a space-time coordinated continuous operating method, each workday is uniformly divided into six (or eight) time intervals, a maintenance operation and a shutdown-required roadway operation are arranged in the third time interval, and coal cutting and non-shutdown-required roadway operations are arranged in the rest of time intervals. According to the invention, the low-web bidirectional high-speed coal cutting process for left triangular coals, moving brackets in a grouped, spaced and staggered mode, and the space-time coordinated continuous operating method are adopted, so that the shortcomings of slow advance speed and low mining efficiency of low coal seams and medium-thickness coal seams are made up, thereby providing a feasible mining method for the high-speed cutting of low coal seams and medium-thickness coal seams.

The invention relates to a spill plate of a coal mining machine. The spill plate comprises a body and a bracket arranged on the bracket. The spill plate is characterized in that the body is connected with a support by a connection rod; the bracket is fixedly connected with an arc-shaped plate by a screw; the body is fixedly connected with a pressing cover. Compared with the traditional spill plate of the coal mining machine, the spill plate of the coal mining machine has the advantages of simple structure and low energy consumption, and convenient to detach and replace and simple to operate. The bracket is connected with the arc-shaped plate and the connection rod to form a connection rod mechanism so that the arc-shaped plate can move in parallel relative to a bottom plate under any roller height in an adjustable range, and furthermore, the working of the coal mining machine is adapted and the good coal filling effect is guaranteed.

The invention relates to a powerful drum of a coal cutter. The powerful drum comprises a drum body (8), a combined main blade (4) and an end disc (6), wherein small blades (9) are arranged at the tail part of the combined main blade (4); the bottoms of the small blades (9) are fixedly welded with the drum body (8); a water inlet channel (402) is formed inside the combined main blade (4); a group of spray holes (401) is formed in the side face of the tail part; the spray holes (401) are communicated with the water inlet channel (402); the spraying direction moves along the axial direction of the drum body; auxiliary blades (2) are arranged on the combined main blade (4); a sealing plate (3) is arranged between the auxiliary blades (2) and the combined main blade (4); a rib plate (5) is fixedly arranged between the combined main blade (4) and the drum body (8); the end disc (6) is welded on the drum body (8); and a wear-resistant plate (7) and small end disc cutting teeth (10) are arranged on the outer side of the end disc (6) along the axial direction of the drum body. According to the powerful drum of the coal cutter disclosed by the invention, the strength and wear resistance of the coal cutter drum are enhanced, and the service life of the drum is prolonged.

The invention provides a deflectable cutting device of a coal mining machine and mainly aims at solving the technical problems of low production efficiency and the like. According to the adopted technical scheme, the device is provided with a transitional frame; the tail end of the transitional frame is hinged with a machine body; the side A of the head end of the transitional frame is hinged with a rocker arm assembly, and the side B of the head end of the transitional frame is provided with an oil cylinder assembly; and one end of the oil cylinder assembly is hinged with the transitional frame, and the other end of the oil cylinder assembly is hinged with the rocker arm assembly. The deflectable cutting device is suitable for a high-power coal mining machine for thin and extremely thin coal seams under a complicated geological condition.

The invention discloses a thin-seam coal mining machine and a chute type coal blocking mechanism thereof. The coal mining machine comprises a rocking arm, the chute type coal blocking mechanism and a rotary drum, wherein the rocking arm comprises a rocking arm shell; the chute type coal blocking mechanism comprises a main coal blocking plate, a connecting rod, a chute pin, a chute plate and an auxiliary coal blocking plate; the main coal blocking plate of the chute type coal blocking mechanism is arranged in an interval formed between the end faces of the rotary drum and the rocking arm; the auxiliary coal blocking plate of the chute type coal blocking mechanism is arranged above the top surface of the rocking arm; the main coal blocking plate is connected with the rocking arm shell, is hinged with the connecting rod and is supported and limited by the connecting rod; the connecting rod is connected with a chute in the chute plate and can slide from a first end to a second end; the chute plate is fastened to the rocking arm shell and is located; the auxiliary coal blocking plate is hinged with the main coal blocking plate. According to the thin-seam coal mining machine, a coal charging effect can be improved; by utilizing the interval between the end faces of the rotary drum and the rocking arm and the space above the top surface of the rocking arm, a coal blocking function is realized without influencing the normal production operation.

The invention relates to a roller for a mixed row cutting tooth coal winning machine. The roller comprises a roller hub, an end disk, pickaxe-shaped cutting teeth and a square connecting sleeve, wherein the roller hub is trapezoidal; the roller hub is provided with a diameter-variable helical blade; the front part of the diameter-variable helical blade is provided with 1 to 2 rows of pickaxe-shaped cutting teeth arranged in a checkerboard way, while the rear part is provided with a plurality of disk cutter devices arranged in the checkerboard way; and the disk cutter devices comprise an upper connecting block, a lower connecting block and disk cutter cutting teeth; the upper connecting block and the lower connecting block are welded on the diameter-variable helical blade; and the disk cutter cutting teeth, the upper connecting block and the lower connecting block are integrated into a whole through bolts. According to the characteristics of compression resistance and low tensile resistance of coal beds, different axial coal dropping amounts along the roller, the gradual diameter change of the blade and the trapezoidal appearance, the coaling effect of the roller is improved by about 15 percent compared with that of the conventional cylindrical roller, and the lump coal cutting rate is improved by 7 percent; and the roller is suitable for mining low coal beds with the coal bed thickness of below 1.3m and the dip angle of between 0 and 25 degrees. The roller has the advantages of simple and compact structure, convenient operation, good cutting effect, good coaling effect and high rock breaking ability.

The invention discloses a cutting section of a coal shearer with a differential separation drum, which comprises: the motor drive section includes a left cutting motor and a right cutting motor, both of which are arranged in the cutting section box, through The gear transmission part realizes the transmission connection with the output part of the drum; the output part of the drum includes a high-speed output shaft, a low-speed output shaft, a middle support frame, a high-speed drum, a distal support frame, and a low-speed drum, and separates a cutting drum into coaxial The two parts of the rotation can realize the differential rotation of the two parts of the drum. The low-speed drum at the front end has a low rotation speed, so that the cut coal has better axial fluidity, and can better transport the coal to the rotating area of ​​the high-speed drum. The speed of the high-speed drum is much higher than that of the The low-speed drum, so the coal block can obtain higher tangential and axial speeds through the action of the high-speed drum, so that the coal can cross the distance from the end of the drum to the middle groove of the scraper machine, and better complete the process of drum conveying and coal loading.

The invention provides a bottom cleaning drum shearer for thin coal seams. The drum shearer is characterized in that a cutting part shell comprises a first cutting drum transmission cavity shell, a transition section shell and a second cutting drum transmission cavity shell; the first cutting drum transmission cavity shell extends out of ledges of a middle groove and transition groove of a scraper conveyer towards the coal wall side via the transition section shell and bends towards the lower part; a top slope cut edge structure and a bottom slope cut edge structure are arranged at the rear end of the transition section shell; inner cavity flanges of first and second planetary mechanisms are respectively connected with inner cavity flanges of the first and second cutting drum transmission cavity shells by bolts; outer end face key grooves of the first and second planetary mechanisms are respectively positioned together with outer end face key grooves of the first and second cutting drum transmission cavity shells by end face flat keys. The drum shearer can be used for effectively solving the problem of triangle coal and satisfy the minimum mining height conditions and the adaptability to change of the thickness of coal seams, and conduces to improving the coal charging effects.

The invention relates to a high-power thin coal seam coal mining machine rocker arm with a front-mounted planetary reducer. The high-power thin coal seam coal mining machine rocker arm comprises a rocker arm shell, a cutting motor, a first-stage straight tooth transmission system, a planetary reduction mechanism, a second-stage straight tooth transmission system and a long output shaft, wherein the cutting motor, the first-stage straight tooth transmission system, the planetary reduction mechanism, the second-stage straight tooth transmission system and the long output shaft are installed in the rocker arm shell and are in transmission connection in sequence; a high-speed end installation part and a low-speed end installation part of the rocker arm shell extend front and back and are opposite in a left-right spaced mode, so that the rocker arm shell is in a U shape; the axis of the cutting motor and the axis of the planetary reduction mechanism extend front and back and are installed in two adjacent cavities spaced by one wall in the high-speed end installation part side by side in a left-right mode; the first-stage straight tooth transmission system is arranged in front of the cutting motor and the planetary reduction mechanism; the second-stage straight tooth transmission system is located behind the planetary reduction mechanism and arranged in an inner cavity in the U-shaped bottom of the rocker arm shell; and the long output shaft extends front and back and is installed in an inner cavity of the low-speed end installation part. The high-power thin coal seam coal mining machine rocker arm can be matched with a small-diameter roller, can provide large cutting force and has a good coal loading effect.

The invention discloses a right-angle turning scraper conveyor and a rotary disc mechanism thereof. The right-angle turning scraper conveyor comprises a rotary disc box, a rotary disc assembly, transition grooves and guide blocks, wherein the rotary disc assembly is arranged in the rotary disc box and used for providing turning support for scraper chains, the transition grooves are formed in the two ends of a rotary disc, and the guide blocks are arranged at the joints of the two ends of the rotary disc box and used for guiding scrapers to move from the transition grooves to the rotary disc box; and the rotary disc assembly comprises an upper rotary disc and a lower rotary disc which rotate coaxially and provide turning support for the upper scraper chain and the lower scraper chain correspondingly. According to the right-angle turning scraper conveyor and the rotary disc mechanism thereof, a rotary disc type guide structure is adopted, continuous right-angle turning movement of the scrapers is achieved, coal flow can turn smoothly, and the concentration of bottom chain coal return and underground coal dust can be reduced; the right-angle turning rotary disc is not provided with adriving part, and equipment maintenance is facilitated; and a lap joint mechanism of a scraper conveyor and a reversed loader is omitted, power energy consumption is reduced, the reliability of a transmission part is improved, the service life of the transmission part is prolonged, post configuration is reduced, the ventilation section of the position is increased, and the labor environment is improved.

The invention relates to the technical field of coal production, in particular to a coal cutter drum, a spiral blade for the same and a coal cutter. The spiral blade comprises a first blade and a second blade which are sequentially connected from one end close to a working face to one end away from the working face, and spiral lead angle of the first blade is smaller than that of the second blade.The spiral lead angle of the first blade in the spiral blade is small than that of the second blade, the first blade can increase cutting tooth capacity, and the drum is stressed uniformly in the process of cutting, thereby being little in fluctuation and conducive to cutting; the second blade increases coal containing space, friction between coal and the blades is reduced, and coal throwing speed is increased, so that coal loading capacity of the drum is improved, manual labor is reduced, and coal mining efficiency is improved.

The invention discloses a thin coal seam coal mining machine rocker arm. The thin coal seam coal mining machine rocker arm comprises a rocker arm body and a shock absorbing module, a first-stage horizontal gear transmission is arranged at the right end of the interior of the rocker arm body, the first-stage horizontal gear transmission is sequentially connected to a second-stage horizontal gear transmission, a third-stage planetary reduction transmission and a fourth-stage horizontal gear transmission. The thin coal seam coal mining machine rocker arm has the beneficial effects that rocker armmotors adopt a small-diameter double-motor arrangement structure, the thickness of the rocker arm is effectively reduced, and after the torque is output by the double motors, the power is transmittedto a roller through the four stage gear transmissions; a planetary reducer is arranged at the third-stage transmission position, is away from a roller vibration source, and effectively reduces the impact load of the rocker arm planetary reducer, and the reliability is improved; and the final stage adopts the structure of the horizontal gear output to improve the impact resistance performance andreduce the diameter of a roller output shaft, the height of roller blades is increased, and the coal loading effect of the roller of a thin coal seam coal mining machine is improved.

The invention discloses a drilling and planing part of a thin coal seam drilling and planing combined coal mining machine. Two sets are symmetrically arranged front and back relative to a coal miningmachine fixing box, the two sets of thin coal seam drilling and planing combined coal mining machine drilling and planing parts are installed on the front portion and the rear portion of the coal mining machine fixing box through drilling and planing box shells respectively, each drilling and planing part of the thin coal seam drilling and planing combined coal mining machine comprises a transmission device and a drilling and planing coal mining device, and each drilling and planing coal mining device comprises a hollow drilling part, a crushing drilling part and a coal planing disc part. Thedrilling and planing part of the thin coal seam drilling and planing combined coal mining machine adopts two-stage planetary reduction transmission, and the modes of high-speed stage planetary carrierfloating and low-speed stage sun wheel shaft floating are adopted in the two-stage planetary reduction transmission process, so that the drilling and planing combined coal mining machine is compact in structure, small in size, large in transmission ratio and stable in operation; the mode that drilling and planing combined coal mining is conducted through the drilling and planing coal mining device is adopted, the thin coal seam mining production efficiency can be improved on the premise that the machine body length is effectively shortened, the coal loading effect is improved, the lump coal rate is increased, and the drilling and planing part of the thin coal seam drilling and planing combined coal mining machine is particularly suitable for thin coal seam mining.

The invention relates to an h-shaped cutting device and a high-power thin seam coal mining machine. The h-shaped cutting device comprises a box body, and a cutting motor and a cutting transmission system which are installed in the box body, wherein the cutting transmission system comprises first to seventh gear shaft groups and a planetary reduction mechanism which are in transmission connection in sequence; 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 set points to the front and is coaxially connected with a sun gear of the planetary reduction mechanism; the front part of the cutting motor and the box body part where the cutting motor is located extend forwards in an overhanging mode to exceed the front ends of the third gear shaft group, the fourth gear shaft group, the fifth gear shaft group, the sixth gear shaft group and the seventh gear shaft group; the cutting motor and the planetary reduction mechanism are arranged side by side in a spaced mode in the left-right direction; and a left cutting device and a right cutting device of the high-power thin seam coal mining machine both adopt the h-shaped cutting devices. According to the h-shaped cutting device and the high-power thin seam coal mining machine provided by the invention, the contradiction among the machine surface height, the installed power, the coal passing space and the whole machine adaptability and stability of the thin seam coal mining machine can be solved, and the adaptability of the coal mining machine and the mining efficiency of a thin seam are improved.