Cutting drum for continuous-action pit mining machine

FIELD: mining, particularly machines for obtaining, or the removal of, materials in open-pit mines.

SUBSTANCE: cutting drum has cylindrical body with drive and is connected to mining machine by posts. The cutting drum is provided with disc rolling cutters arranged on line of rolling contact and with conveying augers extending from both ends thereof to drum center. Coils of each conveying auger face each other to divide the drum into two symmetric halves. Side drum surface defined by imaginary disc rolling cutter races includes cylindrical part and conical parts tapering towards outer cutting drum ends and adjoining the cylindrical part. Cylindrical part length is not less than 0.25 of cutting length Hc of material to be separated from rock. Working side surfaces of disc rolling cutters having wedge cross-sections and arranged on both cutting drum body halves in central cutting part thereof face opposite directions. Working side surfaces of disc rolling cutters having wedge cross-sections and arranged in both conical drum body parts face drum center. Both outer ends of cutting drum body are provided with disc rolling cutters made as free-cutting bits having wedge cross-sections facing outside.

EFFECT: possibility to perform continuous mining of rock characterized by increased rigidity.

8 cl, 5 dwg

 

The present invention relates to made in the form of a cutter drum Executive body quarry mining machine of continuous operation according to the restrictive part of the independent claim. Such a cutting drum are most suitable for use in mining of mineral raw materials of high strength, such as coal, ore and other mineral raw materials with high tensile strength under compression, comprising from 50 to 140 MPa, using quarry mining combine, intended for development of milling or planing surface deposits. However, such cutting drum can also be used in the milling road-building machines and crushing plants.

By using a similar career mining combine as quarry mining machines equipped with rotating around its horizontal axis of the drum by the Executive body, the excavation of rock mass is carried out in General by the so-called notches. Such machines are known, for example, from the application DE 19941801 C2, the working width of the drum of the Executive body (called for this reason the cutting drum in accordance with the main purpose of 5-8 times greater than the width of the Executive body of the auger of the combine (coal Shearer), known for its application is the Oia in underground mining. The Executive body of the mountain harvester is equipped with cutters or in the more General case of rock cutting tools, type, number and arrangement of which are selected in accordance with the characteristics of the so-called process of notches. The geometry of the cutting edges of each cutter optimize based on specific conditions. In the process of separation of the developed material from an array, each cutter at the same time will leave behind a free surface to the next and offset it by the circumference of the drum of the Executive body of the cutter. Separated from an array of material in the zone of the Executive body, moves screws in the direction from the outside inwards towards the centre of the Executive body and then gets on the receiving conveyor. During the development of deposits of minerals using pit mining combine, intended for development of milling or planing surface deposits, extraction of mineral raw materials by excavation blocks. The scope of such excavation unit is defined as the product of the square of rectangular in the direction of the longwall area captured by the Executive body quarry mining combine, on the length of the excavation area along strike. Mining technology is useful is x minerals using a similar mountain harvester is known from the article "Konstruktive und verfahrenstechnische Voraussetzungen und first experiences bei der Entwicklung a Surface Miners fü r den Einsatz in a Tagebauen", published in the journal "Braunkohle, Surface Mining", v.49, No.2, 1997, SS-128. In accordance with this technology, the material always develop sequentially arranged next to each other excavation units until, until you developed the entire top layer of the field over its entire width. After that start the next notch, the underlying layer that develop adjacent to each other excavation units. During extraction using pit mining combine continuous action intended for developing milling or planing surface deposits, its Executive body with one or both of the parties does free cutting developed rocks (array). Such free cutting accompanied by significantly higher energy consumption and heavy wear of rock cutting tools and necessitates special equipment of the Executive body of rock cutting tools at its edge areas unlike his other, more Central part. With increasing hardness of rock in the field of mineral raw materials increase the cost of equipment necessary for maintenance-free external cutting edges of the Executive body. The famous dobigny the machines separated from an array of material from external parties, the Executive body of the partially ejected to the side edge cutters. For this reason, the entire length of the excavation unit formed a kind of mounds of separated from the array of material. The formation of such lumps due to the poor performance of mining and the need to use additional Stripping technique. Therefore, to reduce the number of such forms mounds of material in the recess of the next excavation drum unit Executive body quarry mining combine, intended for development of milling or planing surface deposits involves not across its width, and partially running "idle" from already developed surface of the array. For this reason, the inevitable additional loss of performance of mining. Other disadvantages include cutters with round rod reel of the Executive body are that sliding contact of the cutters with abrasive rock due to high energy losses and intensive wear of the incisor teeth. In addition, the development of mineral deposits, the tensile strength which is in compression greater than 60 MPa, excessively increases specific energy consumption, which makes use of quarry mining combine, intended for development of milling or planing surface deposits, economically impractical for excavation p is such material. Another disadvantage associated with increased pylevydeleniem as a result of crushing into powder rocks in the process of sewage treatment works. When the work of the Executive body of the career of the mining machine in the mode of cutting from the bottom up cutters affect the breed with high explosive efforts, leading to chipping from rocks larger pieces. Such large pieces of rock are hampering the conduct of the mechanized process of mining and under certain conditions may cause performance degradation by mining or require equipment quarry mining combine additional intermediate crusher for grinding.

To avoid some of the above disadvantages allows use as a rock cutting tool disk milling cutters, which are in contact with rock roll on it and are therefore subject to much less intense wear compared to conventional cutters with round rod. The main condition for the successful application of the disk milling cutters is the lower limit of tensile strength of rock compared to the limit of its strength in compression ratio between the ultimate compressive strength and ultimate tensile strength of rock should be σSGstretching ≈10. The use of a disc cutter also allows the use of mining techniques in the fields of mineral raw materials, the tensile strength which compression is 140 MPa. In order to optimize the separation process of the developed material from an array of rotating disk milling cutter for mining career harvester designed for excavation of rock milling or planing the surface deposits are in the form of a disk miniseries that have directed towards each other turns of the screw so that the working side of their wedge in the cut part facing toward the edges of the drum of the Executive body. With this arrangement, rock cutting tools of lateral forces acting on them on both halves of the drum of the Executive body in the process of separation of the developed material from an array of mutually balanced. At the regional section of the drum of the Executive body is characterized by the prevalence of such conditions destruction detachable from an array of material that differs significantly higher values of resistance of rock excavation, because in this area the Executive body shall make free cutting.

Sinking screw machines are successfully used in underground mining to add the Chi coal, salt and soft ore. The drum corps of the Executive body of such sinking screw harvesters equipped with cutters with round rod or drill bits for drilling, which have a spiral on one or more turns of the screw. However, the prior art and is equipped with disc cones treatment drum or screw harvesters. So, for example, from the article A.Klich and .Krauze entitled "Walzenschrämlader mit glatten Disken zur Kohlengewinnung" and published in the journal "Bergbau", t, No. 2, 1989, SS-55, known screw machine across the entire width of the valve body which screws are mounted with their coils disk milling cutters. Thus tops are wedge-shaped in section, of part of the disk milling cutters are oriented parallel to the velocity vector cutting. At the regional plot of the Executive body of traditional fixed cutters or cutters with round rod, having them with step comprising from 0.4 to 0.8 of the distance between lines cutting disk cutter, and under the opposite angle, so that the screw Assembly is also provided free cutting. The entire auger Assembly is attached to the lifting arm. Disk milling cutter mounted on coils of a screw so as to ensure the possibility of cutting mode from free to Polubarinova. Department razrabatyvaemej the material from the array by means of a screw Assembly with the disk milling cutters and cutting disc occurs due to the formation of parallel lines cut free surfaces perpendicular to the surface of a rock formation and separation, respectively, of breaking off, from an array of material in the form of large fragments or fragments within a specified value capture. The step of cutting (the step between lines cutting), characterized by development of minerals such as coal or salt (ultimate strength in compression is from 20 to 30 MPa), ranges from 50 to 80 mm, the Department developed material from an array within a specified value capture occurs as a result of rolling (primary rolling) rolling cutters on the rock. Separated from the array material is then loaded screws on the conveyor. The practical realization of this known from the prior art technology is illustrated with both drawings shown on p.53 of the above article. On the rotating body screw aggregate mining machine fixed disk milling cutter with their holders. Placement direction of the disk milling cutters coincides with the direction the screw turns on the rotating body of the Executive authority. The number of turns of the screw depends on the required performance of mining operations and properties of rocks. The circumference of the cutting ring screw Executive body has radial cutters, whose vertices are alternately outwards and to the cutting auger or cutting drum. This ensures the cutting in the rock Massi is, and in the area of the face formed free surface for the disk milling cutters. The density of radial cutters on the same line cutting at least twice the density of the disk milling cutters. For more efficient ejection separated from the array of material on the conveyor is provided by additional loading wedges. The standard width of the screw Executive body of the screw unit ranges from 0.63 to 1.0 m thus, during extraction of the disk milling cutter separates the material from the array on the so-called plot of the face in the direction of the feed screw unit, and the side cutting discs (cutting ring)with the traditional cutters, form a boundary surface between the face and sole, respectively, the roof of the stope (lava). For the normal functioning of the lining and coupled with it the conveyor lava should have just limited the Board. Such screw units with cutting discs and disc milling cutters suitable for development of coal with solid inclusions and layers, because the process of separation of the mined material from the array based mainly on overcoming the limit of the tensile strength of the developed material that reduces the pylevydeleniem by separating from an array of coarse material and the wear of the cones. Such screw units due to their narrow design and only unilateral move them separated from the array of material, but also because of the placing of the disk milling cutters based on the Commission free cutting (and therefore relatively high density of cones and high effort required for their application to the array) is not suitable for cost-effective development of strong and thin layers with quarry mining harvesters for development by milling or planing surface deposits, due to under-performance of mining. For education just limited Board of lava cutters should be placed on the side of the cutting disk with high density. In addition, the application portarray tools two different types and cutting discs is not optimal from a technological and economic point of view.

In the article "Einsatzmoglichkeiten des Surface Miners und erste first experiences auBerhalb der Kohle", published in the journal "Braunkohle, Surface Mining", v.49, No.2, 1997, s-149, the following design screw Executive body with the disk cutters are designed for quarry mining combine continuous steps used to develop the milling or planing surface deposits, and have over traditional milling drum is ispolnitellnym body equipped with cutters with round rod (see figure 10 in that article). In accordance with this, these so-called quarry mining combine with disc cutters its Executive body is a combination of the main production unit with a number of displaced relative to each other disk cutters and receiving the milling drum of the Executive body, equipped with cutters with round rod. From this receiving of the milling drum of the Executive body separated from an array of material known by flows through a discharge tray for receiving the conveyor belt. Disk milling cutter (which in the above publications are also called disk cutters) have a diameter of 430 mm and is installed on the support of their Executive authority in a number of increments equal to about 200 mm, and offset relative to each other in the direction of the longwall section. During extraction, the entire disk of the milling cutter are in constant contact with the front of the sewage treatment works and rolling on developing the breed perpendicular to its surface. Own weight quarry mining combine evenly transmitted to all of the disk milling cutter and creates thereby force them pressing to breed. Under disk milling cutters formed area of the grinding or crushing, dominated by quasi the hydrostatic pressure. Under the influence of such compressive stresses to the material under the line of putting it in disk milling cutter and the side of her applied tension and the cutting load. In a rock mass formed by the radial unloading cracks and lateral cracks. These cracks provide the possibility of breaking or breaking off the mined material toward the free surface. Excavation of material to a height of stope, preliminary coarse grinding separated from an array of material and Stripping the plane of the bottom are provided with foster milling drum by the Executive body. In accordance with this, for carrying out cleaning work required two Executive body mounted on the frame of the mining machine. This Executive body with disc cutters does not have its own drive. In order to ensure efficient separation of the developed material from an array of disk milling cutters need to create significant efforts of their application to the array. Under the assumption that the contact force of the disk milling cutters to the array is created under their own gravity mining machines, and the force required for rolling disc cutters, created sections of the mining machine. Disadvantages having similar performance career mining harvester is, intended for development by milling or planing the surface deposits consist in the fact that because of the front contact all disk milling cutters with the rock surface when the step between them (step cut)equal to 200 mm, and only once they are rolling on the breed virtually eliminates the possibility of formation of artificial free surfaces, as in the application of disk milling cutters with diameters from 350 to 430 mm has to consider their contact with the rock in an arc of a great length that their penetration or incision into the rock at a sufficiently great depth requires the application to them of exceptionally high effort of their application to the array. In addition, the use of two Executive bodies due to the increase of the crawler base and thereby creating unfavorable conditions for maneuvering quarry mining combine at the end of the ledge.

The present invention was used to develop made in the form of a cutter drum Executive body specified in the restrictive part of the independent claim of the type which, on the one hand, would provide the development with high fortress of rocks combine the method with a relatively small consumption of energy and thus would be suitable for use in quarry mining comb INAH, intended for development by milling or planing the surface deposits in road milling machines or crushing plants, and on the other hand, would combine advantages such as the possibility of separating lumpy rock mass due to the destruction of rocks as the result of crack formation, reduced pylevydeleniem, high resistance portarray instruments due to their rolling contact with the rock massif, long service life, high performance mining operations by reducing time lost in replacing portarray tools (thanks to 10 times lower intensity of wear of the disk milling cutters) and the exclusion of education of the lateral tubercles of the emitted outward separated from an array of material. In addition, the governing body must admit the possibility of equipping the same type of rock cutting tools and to ensure the opportunity is usually hindered the development of the breed in its regional area of consistently high quality, as well as a full cleaning of the face from behind from an array of material.

This task is solved by means made in accordance with the distinctive features of independent claim of the cutting drum, which is based on the principle of separation m the material from the array repeatedly blocked by the cuts. On equal halves of housing proposed in the invention of the cutting drum are equipped with disc mineralissima conveyor screws, the coils of which are directed towards each other and offset from each other around the circumference of the cutting drum (layout with double spirals) and thereby simultaneously provide the Department developed material from the array and combined radial-transverse movement separated from the array of material. Working the lateral surface of the wedge-shaped in section, of part of the disk miniseries located on one half of the body of the cutting drum, and working the lateral surface of the wedge-shaped in section, of part of the disk miniseries located on the other half of the body of the cutting drum, facing in mutually opposite side that provides mutual compensation perceive the cutting drum side efforts. At the regional area of each half of the cutter drum turns transporting screws, respectively, the housing is designed so that the imaginary surface of the rolling cutter drum of a diameter equal to the diameter of vertices disk miniseries, i.e. the diameter of the circular path described by the vertices disk miniseries during rotation of the cutting drum has the shape of a truncated cone, the benefit is area which the surface of the working platform, remaining after separation of the developing material from the array gets zheloboobraznogo profile in cross section perpendicular to the direction of movement of the harvester. In other words, in this form indicated by an imaginary surface of the rolling cutter drum on those areas where it has the shape of a truncated cone, is separated from the array fewer rocks. As a result, these areas it is possible to reduce the resistance of rock excavation. In addition to the marginal areas of the cutting drum of the developed material that must be moved transporting augers in the transverse direction to the center of the drum, is separated from the array in smaller quantities. The length of each of the boundary sections of the cutting drum, on which his imaginary surface of the roller has the shape of a truncated cone, must not be less than 1/4 of the depth of cut, i.e. the height of the slaughter, because in this case the geometry is separated from an array of material remaining in the subsequent cycle of mining on each side of the developed area zheloboobraznogo in the cross-section profile is located at a lesser depth than the material remaining on the developed portion of the center of the cutting drum. The material remaining on the sides at the junction of two adjacent to each other excavation sites VC is noobraznoe in the cross-section profile, formed after testing each of them in one of two opposite directions, together forms in cross-section converging in a common apex elevation. When developing the underlying excavation block forming this elevation of the material without any problems is removed from the surface deposits of the Central part of the cutting drum, which is defined by the front of the treatment works, the layer is greater because of the presence of such a ledge thickness, without resulting negative impact on the entire development process. Through directed sideways spreading destruction detachable from an array of material under the side surfaces of the wedge-shaped in section, of part of the disk miniseries and due to their rolling contact with rock, and also due to the lower volume separated from the array at the boundary areas of the cutting drum of material and most of the reception ability of the blade on the work site zheloboobraznogo in the cross-section profile in the process of notches on the sides of the excavation of the site are not formed mounds of separated from the array of material. The result is improved performance of mining operations and reduced energy consumption.

In order to simplify the design of the cutting drum with the location of the transporting screws and disk miniseries in the form of a double helix, as well as to reduce the production of RA who moves on its manufacturing conveyor screws on each of the two halves of the cutter drum is proposed to place throughout their length from the edge of the cutter drum until its center. Since the separation of the developing material from the array at the regional section of the cutting drum is due to the edge effect at higher resilience rock excavation, this regional section of the cutting drum disk Mineralogy place at least twice the density per line them rolling, which in this place provide additional shortened conveyor screws. Thanks to the double density disk miniseries at the regional section of the cutting drum, the depth of their penetration into the rock at this regional section of the cutting drum is only half of the depth of penetration into the rock disk miniseries, located in the Central part of the cutting drum, i.e. in the Central part of the front of the treatment works or downhole plot. As a result, the height of the coils transporting screws at the boundary areas of the cutting drum, on which his imaginary surface of the roller has the shape of a truncated cone, can be increased by the amount equal to the reduced depth of penetration into the rock located in the regional area of the cutting drum disk miniseries, at the same time can significantly improve the quality of cleaning the work site and the efficiency of energy transfer from disk miniseries the array and thereby reduce the specific energy consumption. The advantage of the proposed invention the cutting drum is the ability to equip the same type of rock cutting tools, in particular disk mineralissima.

Other advantages of the invention discussed below in more detail by the example of the preferred variants of its implementation with reference to the accompanying drawings on which is shown:

figure 1 is a front view of a cutter drum for quarry mining combine, intended for development of milling or planing surface deposits,

figure 2 - layout of disk miniseries and transporting screws on presents in the form of a scan plane of the housing shown in Fig.1 cutter drum

figure 3 is an imaginary surface of the rolling cutter drum of a diameter equal to the diameter of vertices disk miniseries, and the cross-section surface of the working platform after the separation of the material from the array using the cutter drum in the direction of a longwall section,

figure 4 - layout of disk miniseries on the housing of the cutting drum with regard to their lateral distance from the perpendicular center line of the body of the cutting drum and

figure 5 - block disk miniseries symmetric position.

Shown in figure 1, the cutting drum is used in the Executive body of the career of the harvester, used for excavation of rocks high strength, such as coal, ore and other mineral raw materials with high tensile strength under compression, comprising from 50 to 140 MPa, milling or planing surface deposits. Such quarry mining machine of the continuous actions of the Executive authority which, however, are not designed for the exploitation of mineral raw materials, having such a high tensile strength in compression, is known, for example, from the application DE 19941799 A1. A cutting drum with a horizontal axis 1 of rotation is set before career harvester, when viewed in the direction of testing. However, such placement of the cutter drum is not unique. For example, the cutting drum may also be located between the front and rear chassis parts or rear of career harvester.

The cutting drum consists of a housing 2, in which each side is located on drive 3, 4. The cutting drum is mounted to career harvester using located on both sides of the frame uprights 5, 6, on the lower free end of which is fixed actuators 3, 4. The movement of the cutting feed drum is provided by moving career harvester. The cutting drum works with cutting material from top to bottom. However, proposed in the invention, the solution in equal step is nor can be used and applied to the cutting drum, rotating in the reverse direction and, therefore, working with cutting material from the bottom up.

On the side surface of the housing 2 of the cutting drum is described below and shown in figures 1 and 2 organized disk Mineralogy 7, 8, 9 and conveyor screws 10, 11, 12, 13. For use as a disk miniseries 7, 8, 9 primarily suitable disk Mineralogy known from the application DE 10158603.5 C1 design. Conveyor screws 10, 11, 12, 13 are composed of metal segments welded to the body 2 at right angles to its lateral surface. Case 2 cutter drum may have a cylindrical shape of constant diameter throughout the length of the axis 1 of rotation of the cutting drum, but in another embodiment can have on both sides of the larger diameter compared to the diameter at its Central area. The advantage of the last of these options with the execution of the body of the cutting drum is stepped shape, as shown in figure 1, is that at both end parts of the housing of the cutting drum is formed sufficiently large space for placement of the actuators 3, 4 inside the cutter drum. In the Central area, where the housing of the cutting drum has a smaller diameter between the side surface of the housing 2 of the cutting drum and the imaginary cylindrical surface is rnostly 14 rolling cutter drum, a diameter equal to the diameter of vertices disk miniseries 7, 8, 9, i.e. the diameter of the circular path described by the vertices disk miniseries during rotation of the cutting drum, there is more room for lateral movement separated from the array of material. This is of particular advantage, since in this Central area has the largest stream is separated from the array of material.

Portorosa tools and guides separated from the array fixture material disposed on the outer surface of the housing of the cutting drum so as to allow optimal separation of the developing material from the rock mass and that the pieces separated from the array of material moved, making a combined radial-axial movement, from the edges of the cutting drum to its centre, where separated from an array of material emitted cutting drum and moving further by inertia in a parabolic trajectory, hits multiple drain trays on the receiving conveyor belt.

When using disk miniseries 7, 8, 9 provides the separation material from the array or blasting with repeatedly blocked by the cuts. The peculiarity of this process of separation of the material from the array repeatedly blocked by cuts concludes what I is the conditions for breaking off or separation of material from the array are created only after repeated rolling mills to breed with their feed cutting feed mechanism. While mass production of the machine is transmitted only on the disk Mineralogy 7, 8, 9, directly in the moment affect the breed, and thus creates the necessary contact force these rock cutting tools to the array. Only due to the associated large step cutting (step between the lines of cut), which is one of the necessary conditions for separation of the material from the array repeatedly blocked cut, you receive the possibility of placing durable, suitable for operation in harsh conditions with holders 15 together with the mounted disk mineralissima 7, 8, 9 for transporting augers 10, 11, 12, 13, and thereby the possibility of practical realization of a roller recess of the developed material with a wide swath of the Executive body. Achieved benefit is significantly reduced due to the large step of cutting the number of required disk miniseries 7, 8, 9, associated with a positive effect, in turn, is the ability to develop a sufficiently high contact force, paradores sausage tool to the array based on one disk minieres 7, 8, 9. Since the movement of the feed that is implemented by moving the entire mining machine is continuous, with subsequent cycles of the rolling disk miniseries 7, 8, 9 on the breed achieved this degree of their submission on cutting, which leads to an increase in the depth of their penetration into the rock. Due to repeated rolling wedge-shaped in section, of the cutting edges of the disk miniseries on the same line of cut in the top layer of rocks occur layered and continuously increasing load independent of the tensile stresses, resulting in the application of the material to tension and the cutting load is below the line and to the side of the line of contact of the disk Mineralogy with the breed. Due to the initially large step cut, which provides separation of the material from the array mode with the locked cut in the rock formed mainly radial cracks. During subsequent cycles of the rolling disk miniseries to breed these cracks increase. In this way formed the backbone cracks or formed under the action of tensile stress cracks, which in subsequent cycles of the rolling disk miniseries on the breed to increase the handling of the cracks, the formation of which material you get from breed freely towards the top of the spine of the array. For this reason, from an array of separate large pieces of rock, the thickness of which S much more R and arc length which is in accordance with the curvature of the imaginary line rolling, described disk miniarray during rotation of the cutting drum, far exceeds the value of (3-5)×tB. Thanks to the rolling disk miniseries 7, 8, 9 to develop material in contact with the array on the cutting drum to bring the rotation of the need to transfer less torque. As a result, when the small consumption of energy from the array can separate the coarse material. This ensures the development of hard and abrasive rock with economical expenditure of energy.

Given that the development of mineral raw materials using career combine material is separated his cutting drum from solid rock in the form of rectangular blocks in the direction of the testing section should be based on the availability of the whole length of the cutting drum areas dominated by different conditions of extraction. More complex conditions excavation prevail in those places where the separation material from the array should be the cutting drum by the side of free cutting. When carrying out the process in a continuous mode, the material can not be separated from the array in the wrong place as easily the plot on which the material is separated from the massif Central part of the cutting drum. In the side area of the material can be split off from the array and drained in one direction only. In the rest of the greater part of the cross section of the excavation area is dominated by the more favorable conditions of extraction. The cutting drum about its geometry and its equipment portaransas tools and guides separated from an array of material devices must meet both of these different conditions of the material cut.

Because the process of extraction of free cutting by the cutter drum housing should occur on both sides or only on one of its sides, and separated from the array of material should always be made on both sides of the cutting drum to its centre, a cutting drum perform symmetric and provide relevant portaransas tools and guides separated from an array of material devices. Figures 1 and 2 the middle of the cutter drum is indicated by mediatrici 16. This mediatrice thus, conditionally divides the cutting drum located on the drawings to the left of it and located on the drawings to the right half.

On both halves of the body 2 of the cutting drum are dvukhtochechnye conveyor screws 10, 11 and 12, 13, the threads of which are displaced relative to each other on each half of the body of the cutting drum on its circumference 180° . Conveyor screws 10 and 12 and 11 and 13 located respectively on the left and right halves of the body of the cutting drum, in turn, each of these pairs of offset circumferentially relative to each other by 90°and therefore they do not intersect in the middle of the casing cutter drum. As shown in figure 1, the imaginary outer surface covering conveyor screws 10, 11 and 12, 13 around the circumference of the cutting drum has in its Central part, a cylindrical shape, and then tapers toward both outer ends of the housing in the form of a truncated cone.

Disk Mineralogy 7, 8 are installed to face the center of the cutting drum side walls forming conveyor screws 10, 11 and 12, 13. Holders of these miniseries attached to the walls forming the conveyor screws 10, 11 and 12, 13. Disk Mineralogy 7, 8 have at such a distance from the axis of rotation of the cutting drum to the top of their wedge-shaped cutting edges advocated an imaginary outer surface covering conveyor screws 10, 11 and 12, 13 around the circumference of the cutting drum. This requirement is necessary because the separation material from rocks occurs only after the cutting disk miniseries 7, 8 in it to a certain depth. As shown in figure 3, connecting the cages, which are wedge-shaped cutting edges of the disk miniseries 7, 8 imaginary surface 14 of the rolling cutter drum of a diameter equal to the diameter of vertices disk miniseries has a closed profile, formed with a cylindrical surface, to which both sides are adjacent tapering outward conical surface in the shape of a truncated cone. With the high profile of the imaginary rolling surface of the cutting drum is provided by the Department to the smaller amount of material from the array on the critical area of free cutting either at one end or at both ends of the cutting drum. Figures 1 and 3 illustrate the technology of material cut blocks 17 in the direction from right to left, resulting in a cutting drum must make free cutting only with the left hand. The material, which unlike material, separated from the massif Central part of the cutting drum, remains near its outer lateral sides are not separated from the array, you can without any problems be separated from the array during the development of the underlying layer of the Central part of the cutting drum, because underneath the remaining not separated from the array material excavation blocks at the next pass of career harvester appear as though displaced sideways relative to the overlying excavation units and therefore the remaining elevation is located on the site, zahwah the " Central part of the cutting drum.

In order to ensure high performance and in the separation of the material from the array boundary areas of the cutting drum disk Mineralogy 8 have in these places is more tightly in comparison with the density disk miniseries 7 in the Central hole portion of the cutting drum.

In addition, to ensure sufficient free cutting on the outer imaginary lines rolling disk miniseries on both outer edges according to figure 2 and 4 on the chopping drum provide two offset relative to each other around the circumference of 180° disk Mineralogy 9 as cones for free cutting. The axis of these miniseries are located with an angle to the axis of rotation of the drum in accordance with their cutting edges rejected to the outside. The angle of inclination of the axis of these miniseries to the axis of rotation of the drum or equal to the angle of inclination of the outer side surface of the wedge-shaped in section, of the cutting edge of the disk miniseries 8, or greater than this angle. Used for free cutting disk Mineralogy 9 feature between the two pairs of transporting screws 10, 11 and 12, 13. For better lateral movement separated from the array of material on the cutting drum surface to a larger diameter behind each miniseries 9 for free cutting, if you look towards the attachment of rotation of the cutting drum, additional conveyor screws 18, 19, 20, 21.

The lateral surface of the forming wedge-shaped section of the disk elements disk miniseries 7, 8, 9, is asymmetric with respect to each other. In the cutting process of the developed material always get from solid rock from the side surface of the wedge-shaped in section, of part of the disk Mineralogy, which forms a greater angle with the perpendicular line drawn through the apex of this wedge-shaped portion of the disk Mineralogy to its axis.

The length of both outer truncated cones, the form of which is an imaginary surface of the rolling cutter drum on its edge areas, is at least 1/4 of the depth of cut Hrez. Thus the density of the disk miniseries on marginal plots of length LKUat least twice the density of their location in the Central part of the cutting drum, defining the front of the sewage treatment works and has a length LCi.e. stope. For crushing of hard rocks in the separation of the material from the array repeatedly blocked by the slitting step of cutting tWi.e. the step between lines cutting disk miniseries 7, located in the Central part of the cutting drum, defining the front of the treatment works and the setup portion of the length L C, is calculated by the following formula:

tW=pΣ×ηm,

where

pΣindicates the total depth of penetration of the disk Mineralogy to describe it by an imaginary line rolling in the beginning of the process of separation of the material from the array, the value of pΣan average of 15 to 20 mm, and

ηmdenotes the average value of the modulus of cracking in the beginning of the process of separation of the material from the array, while in case strong and ductile rocks-size ηmshould be taken equal to 3-4, and in the case of strong and fragile rocks-size ηmshould be taken equal to 3.5-5.

Spatial distribution disk miniseries 8, 9 at the boundary sites of length LKUand the step between the lines of their cuts are set within the parameters of the so-called free cutting. In this case, tSHK=(1-2)×pΣwhile located at the boundary areas of the cutting drum disk Mineralogy 8 is installed on the conveying augers 10, 11, 12, 13 and additional conveying augers 18, 19, 20, 21 on the same lines rolling and working outwards side surface of the wedge in terms of paragraph (2 and 4). On each of the imaginary lines rolling on the regional area length LKUis is twice as much disk miniseries, and conveyor screws on the regional area length LKUmade higher in comparison with the conveying augers in the Central part of the front face by an amount equal to the depth of incision of these boundary disk miniseries.

Separated from an array of material moved conveying screws 10, 11, 12, 13 and additional conveying augers 18, 19, 20, 21 in the transverse direction to the center of the cutter drum. Shown in figure 3 the inclination of the surface of the working platform 22 in the area of one of the marginal areas of the cutting drum due to the smaller volume of discharge at this location from an array of material and more effective cleaning of the face from the broken material due to elevated transporting screws, eliminating the possibility of formation of hillock of separated from the array of material near the front of the sewage treatment works. To achieve this same effect also contributes to the spalling of material from the array side inward within specified value capture. By separating the underlying excavation blocks remaining on the working platform ledges with protruding edges almost completely cut off, resulting in this residual material has no effect on the overall efficiency of the process of development of mineral resources. The material remaining on the phase boundary is x due to the smaller depth of cut H rezwithout any problems it is separated from the array during subsequent excavation of the underlying excavation units as a result of displacement of the Central cutting section of the cutting drum to the side, regarding this material, because this area is dominated by the most favorable conditions for the Department of the developed material from the array and subsequent allotment separated from the array of material.

In the second embodiment of the invention the cutting drum to equip blocks 23 disk miniseries. Each such unit 23 is, as shown in figure 5, two pairs installed in one holder 24 symmetrically relative to each other disk miniseries 25, 26. Axial forces, perceived both disk mineralissima 25, 26 one pair directly balanced in the holder 24, which increases the smoothness of the entire Executive body. Important is the fact that workers lateral surface of the wedge in the cut parts of mineralogic facing in opposite directions, allowing transmitted from each of them on a holder 24 efforts have opposite orientation. The distance between the vertices of both disk miniseries 25, 26 single block 23 at the same time equals the step shown in figure 2 between the lines of cutting that every time SL is blowing set from the properties specifically developed rocks. Similarly when placing blocks 23 disk miniseries for transporting augers 10, 11, 12, 13 and additional conveying augers 18, 19, 20, 21 must be able to withstand a certain step of cutting. In contrast to equip the cutting drum separate disk mineralissima 7, 8, 9 when installed in pairs disk miniseries 25, 26 it is necessary to make smaller by about 20% of the effort they are pressed to the array (the normal force) and less about 28% of the tangential force (force rolling). The optimal step of cutting related to one pair of disk miniseries 25, 26 can be maintained by changing the length of their common axis without time-consuming and complicated changeover.

1. The cutting drum quarry mining machine continuous development representing hard and abrasive rock mineral raw materials, which mainly cylindrical body (2), which is supplied by the actuator (3, 4) and attached to the quarry mining machine by means of the uprights (5, 6), equipped located on the lines of the rolling disc cutters (7, 8, 9) and is provided extending from each of its both ends to the center conveying augers(10, 11, 12, 13), the coils which are directed towards each other and are therefore conventionally divided on having two symmetrical relative to each other, the execution of the half, the casing cutter is of Urbana, which mineral raw material is separated from rocks or array excavation units and greater Central portion of which is designated as the section that defines the front of the treatment works, and to which both sides are adjacent peripheries, wherein the generated imaginary raceways disk milling cutters (7, 8, 9) the imaginary side surface of the cutting drum consists of a Central cylindrical portion, to which both sides are adjacent tapers towards the outer ends of the cutting drum in the form of a truncated cone part, the length of which is at least a 0.25 depth of cut Hrezseparated from the rock material placed on each of the halves of the body of the cutting drum conveyor screws (10, 11, 12, 13) is displaced along its circumference at equal angular distance from each other and located on one of the halves of the body of the cutting drum conveyor screws (10, 11) is displaced around the circumference of the cutting drum relative to the other half of the body of the cutting drum transporting screws (12, 13) by an amount equal to half the angular distance between the conveying augers positioned on one half of the body of the cutting drum, facing the center of the cutting drum hand turns transporting screws (10, 11, 12, 13)directly on them or behind them, if you look in the direction of rotation of the cutting drum, installed disc cone (7, 8), while working the lateral surface of the wedge-shaped in section, of parts of the disk milling cutters (7)located on both halves of the body of the cutting drum in its Central cutting portion facing in mutually opposite directions, and working the lateral surface of the wedge-shaped in section, of parts of the disk milling cutters (8)located on both having the shape of a truncated cone housing parts of the cutting drum, drawn to its center, and on both outer edges of the casing cutter drum mounted disk milling cutter (9) as for milling cutters free cutting, working the lateral surface of the wedge-shaped in section, parts of which face outward.

2. The cutting drum according to claim 1, characterized in that the step between lines cutting disk cutter (7), located on both halves of the body of the cutting drum in its Central cutting part for transporting augers(10, 11, 12, 13), is calculated by the following formula:

tW=pΣ·ηm,

where tW- step cutting between the lines of disk milling cutters;

pΣ- the total depth of penetration of the disk Mineralogy in the beginning of the process of separation of the material from the array, and is equal to 15-20 mm;

ηm- the average value of the modulus of the races is rescueme in the beginning of the process of separation of the material from the array, equals 3-4 for strong and fragile rocks and is equal to 3.5 to 5 for strong and ductile rocks.

3. The cutting drum according to claim 1 or 2, characterized in that the density of the disk milling cutters (8) both having the shape of a truncated cone boundary plots of length LKUat least twice the density of the disk milling cutters (7) in the Central cutting part length LMand conveyor screws (10, 11, 12, 13) having the shape of a truncated cone boundary plots of length LKUabove the transporting screws (10, 11, 12, 13) and additional transporting screws (18, 19, 20, 21) in the Central cutting part length LMby an amount equal to the depth of the cutting disk cutter (8)located on both having the shape of a truncated cone boundary plots of length LKU.

4. The cutting drum according to claim 1 or 2, characterized in that the housing of the cutting drum on both having the shape of a truncated cone boundary sites feature additional conveying augers(18, 19, 20, 21).

5. The cutting drum according to claim 1 or 2, characterized in that designed for free cutting disk milling cutter (9) on the outer lines of rolling elements installed with the outward tilt angle, which is equal to the angle of inclination of the outer side surface of the wedge into the cut side of the disk ball is the loud (8) or exceeds this angle.

6. The cutting drum according to claim 1 or 2, characterized in that the coils of the transporting screws (10, 11, 12,13) pass through the entire length of the respective housing halves of the cutting drum.

7. The cutting drum according to claim 1, characterized in that alternative two disk milling cutter (25, 26) pairs are mounted on a common holder (24)with the holder (24) of milling cutters mounted on the cutting drum or directly on the coils of transporting screws (10, 11, 12, 13) and additional transporting screws(18, 19, 20, 21), or behind them, when viewed in the direction of rotation of the cutting drum, and the distance between the tops of the wedge-shaped parts disc cones (25, 26) one pair at the same time step equals between the lines of cut.

8. The cutting drum according to claim 1 or 7, characterized in that the variation of the step between the lines of cutting related to one pair of disc cones (25, 26) are used axis corresponding length.



 

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