RU2780787C1 - Actuator of the mining combine - Google Patents

Abstract

FIELD: mining industry.

SUBSTANCE: invention relates to the mining industry and can be used in tunneling and cleaning combines for the destruction of a mountain massif by a working tool of actuators. The actuator of the tunneling and cleaning combine includes two planetary inclined-cutting actuators with rotating cutting discs mounted on handles that carry out portable movement. At the same time, the cutting discs of the mentioned planetary inclined-cutting actuators are installed at an angle to the plane perpendicular to the longitudinal axis of movement of the combine, to ensure the possibility of destruction of the face by the front and rear cutters along the course of movement of the handles by the edges of the cutting discs of different planetary inclined-cutting actuators by cross, periodic, divergent-converging cuts of cycloidal-radial direction with equal depth at the places of their intersection.

EFFECT: expanding the functionality and improving the performance of the combine, due to a decrease in the yield of small fractions in the ore, a decrease in energy consumption for the destruction of the rock mass and an increase in the traction capacity of the crawler moving the combine.

1 cl, 2 dwg

Description

Field of invention

The invention relates to the mining industry and can be used in roadheaders for the destruction of the rock mass by the working tool of the executive bodies.

State of the art

Known methods for the destruction of the rock mass by intersecting cutters using planetary-disk and rotary executive bodies of tunneling-cleaning machines [1, 2, 3].

In the known methods, the destruction of the rock mass is carried out by tangential and radial cuts of the rotary actuators, or by cycloidal-radial cuts of the planetary-disk organs.

A common disadvantage that reduces the efficiency of using the known methods of destruction of the rock mass is due to the large number of cutters installed on both executive bodies. On the basis of experimental studies, it was found that the cutting step, at which the specific energy consumption for the destruction of the rock mass by cross cuts is minimal, is about 3 cm [4]. A large number of cutters in contact with the rock mass leads to an increase in the reaction of the face to the executive body in the direction opposite to the movement of the combine and limiting the area of the combine without slipping of the tracks. To eliminate caterpillar slippage, it is necessary to increase the traction ability of the caterpillars, or to use destruction organs with a smaller number of cutters.

Closest to the proposed technical solution is a planetary tilt-disk executive body of a tunneling-cleaning machine that implements the method of destroying a rock mass with cross cuts. Rotating in opposite directions relative to the longitudinal axis of the executive body, the discs are installed at an angle to the plane formed by the longitudinal axis of the destruction body and the radial direction relative to the axis, and destroy the array with successive, intersecting cuts of the radial-tangential and tangential-radial directions [5]. This device of the body of destruction is taken as a prototype.

The common disadvantages of the prototype include the summation of the torques that occur during multidirectional rotation of the cutting discs. So, when the cutters mounted on the disks interacting with the bottom move down, the reaction forces of the bottom on the cutters will be directed upwards, this leads to a decrease in the traction ability of the tracks, causes periodic slippage of the combine caterpillars, and also leads to dynamic loads in the drives and a decrease in the directional stability of the combine. The second drawback of this device is due to the fact that the trajectories of movement of the cutters (for one cutting disk - diverging, and for the other - converging) have sections where the destruction of the rock mass occurs by blocked cuts, characterized by increased specific energy consumption and the output of fine fractions in broken ore. A blocked cut is one that has no effect on neighboring cuts.

Disclosure of the essence of the invention

The objective of the claimed invention is to expand the functionality and improve the performance of the combine, due to a decrease in the yield of fine fractions in the ore, a decrease in energy consumption for the destruction of the array and an increase in the traction ability of the caterpillar moving body of the combine.

To achieve a technical result in the implementation of the invention, it is necessary to destroy the rock mass with cross, periodic, divergent-descending cuts of the cycloidal-radial direction with equal depth at their intersections. The cutting discs are installed at an angle to the plane perpendicular to the longitudinal axis of the combine. With such an arrangement of the executive body, the bottomhole is destroyed by cuts in the front part of one disk (front edge of the disk in the direction of the portable movement of the disk) and cutters in the rear part of the other disk (rear edge). The central part of the executive body is equipped with a rotary chisel, which destroys the central part of the face with an inefficient cross-cutting zone.

The technical result is achieved by the fact that in the invention for divergent-converging, cycloidal-radial cuts, in comparison with the cuts of the prototype, there is an unambiguous relationship between the depth and the pitch of the cuts, i.e. in the first half of the rotation of the cutting disc, the pitch and depth of cuts increase, and in the second half they decrease. With an unambiguous dependence of the cut parameters, the specific energy consumption for destruction and the content of fine fractions in the broken ore are reduced.

When the cutting discs 1, 2 (Fig. 1) move down, and the downhole cutters 3 drive up, the reaction of the face on the cutters is directed downward, which increases the adhesion force and traction ability of the tracks with the soil. The movement of the cutting disks upwards occurs in the common zone of destruction of the bottomhole by both executive bodies, therefore, the decrease in traction capacity during this period is much less compared to its increase when the cutting disks move upwards, and the total reaction of the bottomhole on both disks, unlike the prototype, increases the traction ability caterpillars. The increase in the traction ability of the tracks is also facilitated by the absence of a vertical component of the bottomhole reaction in the area destroyed by the chimney.

The movement of the cutting disks with the rear cutting edge up is accompanied by filling the space between the disk and the bottom with broken rock mass, its regrinding and additional energy losses in the drives of relative and portable motion. To eliminate the filling of the space between the disk and the face with broken rock mass, its regrinding and additional energy losses, it is necessary to use cutting disks with holes between the hub 11 and the rim 12 (Fig. 1), on which the tool holders are mounted.

Description of drawings

In FIG. 1 shows the layout of the executive body of the tunneling machine;

in fig. 2 is a diagram of cross cuts of the executive body of the tunneling and clearing machine.

Implementation of the invention

The executive body of the tunneling-cleaning machine (Fig. 1) includes two planetary tilt-disk executive bodies, each of which consists of two cutting discs 1, 2, on which downhole cutters 3 with tool holders 4 are fixed, coil cutters 5 with tool holders 6, rotary burr 7 with the same downhole 8 and 9 cutters and handles 10. The cutting discs are made with holes between the hub 11 and the rim 12, on which the tool holders 4, 6 are mounted. The hub 11 and the rim 12 are connected by beams 13.

The invention works as follows.

During the working stroke of the harvester, the destruction of the central part of the face occurs by cuts 16 (Fig. 2) of the rotary burr 7 (Fig. 1) mounted on the handle 10 (Fig. 1), downhole 8 and 9 cutters (Fig. 1). The cutting disks 1 and 2 (Fig. 1) realize relative movement in the direction ω _O , at the same time the handle 10 (Fig. 1) performs a portable movement in the direction ω _P (Fig. 1). The inclination of the cutting disks at an angle λ ensures the destruction of the face of the front part of the cutting edge of the disk 1 in the direction of the handle (Fig. 1) and the rear part of the cutting edge of the disk 2 (Fig. 1) in the direction of the handle, mainly with the help of downhole cutters 3 (Fig. 1) installed in tool holders 4 (Fig. 1). This allows you to work out the array of cross, periodic, divergent-converging cuts 14, 15 (Fig. 2) cycloidal-radial direction with the same depth of cut at their intersection. When changing the direction of movement (turns) of the harvester, the rock mass is destroyed by downhole cutters 3, 8 (Fig. 1) and slit cutters 5, 9 (Fig. 1) of the cutting disks and the rotary bit.

Mounted on the cutting discs, the cutters 5 (Fig. 1) during the periods of the rectilinear movement of the combine have a slight load, which increases when performing shunting operations.

The claimed invention can be widely used in the mining industry, in particular, tunneling and cleaning combines of drilling action used in the extraction of minerals by an underground method.

Literature

1. Patent of the Russian Federation No. 2375571 dated 12/10/2009.

2. Patent of the Russian Federation No. 2460882 dated 10.09.2012.

3. Patent of the Russian Federation No. 2465458 dated October 27, 2012.

4. Study of the scheme of cross-cutting / Starkov L.I. [and others] // Mining journal. Izv. Universities. - 1997. - No. 8 - S. 121-123.

5. Patent of the Russian Federation No. 2522111 dated 07/10/2014.

Claims (1)

The executive body of the tunneling and cleaning machine, which includes two planetary tilt-cutting executive bodies with rotating cutter disks mounted on handles that carry out portable movement, characterized in that the cutter disks of the mentioned planetary tilt-cutting executive bodies are installed at an angle to the plane perpendicular to the longitudinal axis the movement of the combine, to ensure the possibility of destroying the face with the cutters of the front and rear in the direction of movement of the handles by the edges of the cutting discs of different planetary oblique-cutting executive bodies by cross, periodic, divergent-converging cuts of the cycloidal-radial direction with equal depth at their intersections.

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