RU198946U1 - EXECUTIVE BODY OF CHECKING MACHINE - Google Patents

Abstract

The utility model relates to the mining industry, in particular, to the executive bodies of combines for the extraction of coal and other minerals by underground and open-cut methods. sequentially one after another along the edge of the sector section of each helical blade, while the distance between adjacent cutters within each group is not less than the radial cutter overhang, and the height of each subsequent cutter in the direction of rotation of the screw is greater than the height of the previous cutter by the value of the optimal cut thickness for the selected cutter type, in this case, the tool holder for the group of tangential cutters is made with three sockets for fixing the tangential cutters, two of which are leading and are installed parallel to each other without advancing, and one of which is lagging and is set at an angle to the plane of rotation in the direction of the inter-incisal whole.

Description

The utility model relates to the mining industry, in particular, to the executive bodies of mining machines for the extraction of coal and other minerals by underground and opencast methods.

Known executive body of a mining combine (inventor's certificate SU USSR No. 1273539, publ. 30.11.1986), including a housing, an eccentric cam interacting with the cutters, while the eccentric cam is movably mounted on the rotary handle and is connected to the body by means of a rod, and the axis the eccentric symmetry is parallel to the longitudinal axis of the combine.

The disadvantages are the complexity of the design and, therefore, low reliability due to sequentially installed and interacting cutters, strips with rollers, eccentric cams associated with the axis and with the rod, and the guide grooves for the moving rollers and the plates for moving the cutters are not protected from clogging by destruction products. array, which will lead to instability of the process of interaction of the kinematic elements of the device and the instability of its operating mode.

Known executive body of a coal harvester (copyright certificate No. 414412, publ. 11/05/1974), including a drum equipped with cams with teeth and buckets and a screw built into a fixed pipe for transporting broken coal, while the auger and pipe are made conical and located extended parts towards unloading.

The disadvantages of the device are the increased mass of the executive body due to the presence of buckets and a stationary pipe, the complexity of the design of the unloading buckets, and insufficient reliability.

Known auger actuator (copyright certificate No. 646046, publ. 02/05/1979), including a hub and blades equipped with tool holders with tangential cutters, while the blades are equipped with additional tool holders for groups of radial cutters located with tool holders for tangential cutters in alternating planes rotation, while in each plane of rotation there are at least two tool holders for groups of radial cutters and not more than one tool holder for tangential cutters. In this case, the tool holder for a group of radial cutters is made with three sockets for fixing radial cutters, one of which is located ahead of the other two, set at an angle to the plane of rotation.

The disadvantages of the claimed device are the complexity of the design due to the different types of cutters and tool holders with three sockets for fixing radial cutters, spaced apart installation of radial cutters in the group provides independent cuts with each cutter with increased grinding and dust formation, the proximity of the cutters in the group increases the dynamics of loads.

Known auger executive body (copyright certificate No. 1323707, publ. 02/10/1986), including a leading cutter with a cutting edge, a lagging cutter with a cutting edge located with an excess over the cutting edge of the leading cutter, and a measuring element that interacts with the lagging cutter, in this case, the leading cutter is made with a recess behind its cutting edge, in which the lagging cutter is hingedly installed, while the hinge axis is located normally to the direction of movement of the leading cutter on a line passing through the perpendicular to the direction of movement of the lagging cutter, lowered from its cutting edge.

The disadvantages of the claimed device are the used measuring cutter cannot be used in a modern screw actuator with rotary cutters, when the cutting force changes, the position of the cutter relative to the leading cutter will change, the gap between the leading and lagging cutters is not protected from dust ingress, which will lead to distortion of the measured values. cutting forces.

Known executive body of a mining machine (copyright certificate SU No. 1838605, publ. 30.08.1993), taken as a prototype, including a screw, on the helical blades of which are fixed tool holders with cutters, which are located in groups in each cutting line sequentially one after the other along the edge sector section of each helical blade, while the distance between adjacent cutters within each group is not less than the radial cutter overhang, and the height of each subsequent cutter in the direction of rotation of the screw is greater than the height of the previous cutter by the value of the optimal cut thickness for the selected cutter type.

The disadvantages of the cutting machine executive body are the complexity of the design of the tool holders for fixing three close cutters in each cutting line, the sickle-shaped cuts with small cut thicknesses lead to high energy consumption and dust formation, the different radial overhang of the cutters in the group determines the cuts that are different in the section and length of the cuts.

The technical result is a screw actuator, which provides an increase in the output of large classes in the process of separating coal from the massif, reduced dust formation and specific energy consumption due to the use of energy-efficient scoring, pair and group cuts.

The technical result is achieved by the fact that the tool holder for the group of tangential incisors is made with three sockets for fixing the tangential incisors, two of which are leading and are installed parallel to each other without advancing each other, and one of which is lagging and is set at an angle to the plane of rotation in the direction of the inter-incisal whole.

The device of the screw executive body is illustrated by the following figures:

fig. 1 - Executive body of the mining machine;

fig. 2 - unit for placing incisors in a group (general view);

fig. 3 - node for placing incisors in a group (section);

fig. 4 is a diagram of the formation of a section of an advanced paired cut;

fig. 5 is a diagram of the formation of a section of a lagging cut.

Where:

1 - executive body of the mining machine;

2 - tool holder;

3 - lagging incisor;

4 - leading incisors;

5 - blade;

6 - paired cut;

7 - lagging cut;

8 - coal massif.

The executive body of the excavating machine is a screw 1 (Fig. 1) with helical blades 5. On the edge of the sector section of each helical blade in each cutting line, tool holders 2 are sequentially installed one after another (Fig. 2). On each tool holder 2, a group of three tangential cutters is installed: two leading cutters 4 and one lagging cutter 3 (Fig. 3). Leading incisors are installed parallel to each other, without advancing each other. The lagging cutter is set at an angle to the plane of rotation in the direction of the inter-incisal solid. The distance between adjacent cutters within each group is not less than the radial cutter overhang, and the installation height of the lagging cutter is greater than the leading cutter height by the value of the optimal cut thickness of the selected cutter type.

Executive body 1 of the excavating machine works as follows. In a stationary mode of operation, when mining coal, the drive of the harvester communicates to the hub and the blades 5 fixed on it with tool holders 2 and cutters 3 and 4 the feed force and torque. The cutters move along the hypocycloids in the bottomhole space, periodically interact with the coal mass 8, making crescent-shaped cuts. Leading incisors 4 cut the groove of the paired cut 6 (Fig. 4). Then, with further rotation of the screw, the lagging cutter 3 cuts the furrow of the lagging cut 7 (Fig. 5). Lagging incisors 3 cleave the inter-incisal pillars, weakened by pre-cut leading furrows.

The use of energy-efficient undercut, pair and group cuts with a common for each stress field in the undercutting space of the massif, creating favorable conditions for cleaving pillars with tangential cutters, reduces dust formation, the output of fine coal grades and specific energy consumption, improves the granulometric composition of mined coal and increases productivity.

The technical and economic efficiency of the technical solution consists in: increasing the yield of large grades in the process of coal mining by screw shearers; in reducing the specific energy consumption, the intensity of dust formation and the output of small classes in the processes of separating coal from the bottomhole massif by auger executive bodies of shearers; in increasing the thickness of the cut and the step of placing the cutters on the executive bodies; in increasing the cross-sectional area of sections using the effect of pairing chips and the formation of group and combined sections.

Claims (1)

The executive body of the excavation machine, including the auger, on the helical blades of which tool holders with cutters are fixed, which are located in groups in each cutting line sequentially one after another along the edge of the sector section of each helical blade, while the distance between adjacent cutters within each group is not less than the radial overhang of the cutter , and the height of each subsequent cutter in the direction of rotation of the screw is greater than the height of the previous cutter by the value of the optimal cut thickness for the selected type of cutter, characterized in that the tool holder for the group of tangential cutters is made with three slots for fixing tangential cutters, two of which are leading and installed in parallel approached without advancing each other, and one of which is lagging and is set at an angle to the plane of rotation in the direction of the inter-incisal integer.

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