Screw the executive body

 

(57) Abstract:

The invention relates to a screw Executive bodies excavation machines. The invention is directed to improving the performance of Samothraki, reducing pressures on the Executive body and the feeding part of the machine. Screw the Executive body includes a cylindrical housing, loading the blade with a screw surface, located on the side of the face ring lobovina, cutters with cutter holders mounted on the screw surface loading of the blade and the ring lobeline. The Executive body provided with end cutters that are installed with the downhole side of the generatrix of the helical surface loading of the blade at an acute angle between the longitudinal axis of the end cutter and the plane tangent to the toroidal surface of the face. End cutters are arranged with a gap between the cutting edge and the flat surface of the face. The angle between the longitudinal axis of the end cutter and the flat surface of the face can bei= arctgH/2Ri (18 2), where N - step helical surface loading of the blade; Ri is the distance from the axis of the auger to the cutting edge mechanical cutter; and the angle between the longitudinal axis of the end cutter and line cutting is (102). Races is.f-crystals, 6 Il.

The invention relates to mining, and in particular to a screw Executive bodies working machines used in Stopes for mining by underground methods.

Known screw Executive body, comprising a cylindrical casing, loading the blade, the cutter holder and the cutter bits with holders that are set so that the vertical and transverse axis of the cutter with holder deployed at an acute angle to the plane perpendicular to the longitudinal axis of the screw Executive body, with the cutting edge of the cutter is located behind the blade.with. USSR N 1656119, CL. E 21 C 25/04, 1991).

Known screw Executive body does not cut excavation machine when moving the AFC towards the bottom, along with longitudinal movement of the harvester has his front movement, in which the bottom is formed trovena surface directed toward lobovina auger. Cutters with cutter holders in screw Executive body set up so that to reduce the grinding of coal and the load on them, but do not ensure the destruction of Carovigno surface of the face formed cock notch of the Executive body of the mining machine, losing productivity, production and greatly increasing the energy consumption for operation of the notches mining machines.

Closest to the proposed to the technical essence and the achieved result is screw Executive body, comprising a cylindrical casing, loading the blade with a screw surface, located on the side of the face ring lobovina, cutters with cutter holders mounted on the screw surface loading of the blade and the ring globuline (and.with. USSR N 367242, CL E 21 C 25/04, 1973) is adopted as a prototype.

In the known technical solution for Samothraki excavation of the authority as an additional reinforcement rod cutters mounted in the guide housing and moving along the longitudinal axis of the auger with hydraulic cylinder, which during Samothraki auger performs the role of an active drill. However, the cutters are located on the pull-rod, cut or drill only limited by the crown diameter of the Central rod segment Carovigno surface of the face formed by Samothrace Executive body of the mining machine. The rest of Carovigno surface of the face is treated incisors, ustrasbenie Carovigno surface of the bottom when you cut mining machines. As a result of poor interaction of the cutters located on lobeline screw Carovigno surface of the face, samodurovka Executive body of the mining machine is carried out on small depth with great efforts of the filing of the machine along the working face to face, resulting in a loss mined and unproductive consumption.

The invention consists in that the screw Executive body provided with end cutters that are installed with the downhole side of the generatrix of the helical surface loading of the blade at an acute angle between the longitudinal axis of the end cutter and the plane tangent to the toroidal surface of the face, and face cutters are arranged with a gap between the cutting edge and the flat surface of the face.

In addition, the angle between the longitudinal axis of the end cutter and the flat surface of the face is

,

where H is the step helical surface loading cavity;

Ri- the distance from the axis of the auger to the cutting edge of the cutter,

and the angle between the longitudinal axis of the end cutter and line cutting is (102o).

In addition, the gap between the cutting edge end of the cutter and the flat surface is a mark of the Executive body of the mining machine by the location of the end cutters for helical surface loading of the blade so what toroidal surface of the face formed by podviganiya the mining machine along the slaughter and be slaughtered, destroyed these cutters with less effort, increasing the performance operation Samothraki and increase mined. In addition, when the work of the Executive authority during Samothraki first cuccolini cutters destroyed slaughter around the toroidal surface and only then comes the destruction of the surface of the end cutters located in the 10-15 mm from the plane of the face formed by cuccolini cutters. While the destruction of the toroidal surface of the face occurs at lower zastarovje Executive body, with greater efficiency and with less intensity process Samothraki.

The technical result of the invention is to improve the performance of Samothraki Executive body of the mining machine and is mined, the reduction of loads on the Executive body and the feeding part of the excavation machine and also the device that supplies the mining machine on the face, increasing the efficiency and reducing the energy intensity of the process Samothraki.

In Fig. 1 is a view of a screw Executive body is obraznoi surface of the face; in Fig. 4 depicts the formation of toroidal surface of the face cuccolini cutters Executive body, top view; Fig. 5 is a diagram of the destruction toroidal surface of the bottom end cutters; Fig. 6 - a view b-B in Fig. 3.

Screw the Executive body includes a cylindrical housing of the screw 1 with a loading blade 2 and the annular lobovina 3. On the outer cylindrical forming helical surface loading of the blade 2 is posted linear cutters 4. On the outer cylindrical surface of the ring lobovina 3 in the slots are the holders 5 cuccolini cutters 6. Screw the surface loading of the blade 2 along its generatrix with a downhole side in the holders 7 are end cutters 8. Flat 9, the bottom surface is formed a screw Executive body in straight-line podviganiya the mining machine along the face. Toroidal 10 surface bottom is formed a screw Executive body while podviganiya the mining machine along the face and the face in the frontal direction.

The longitudinal axis of the end cutter 8 is located at an acute angle to the plane Witangent to 10 toroidal surface of the face. End cutters 8 raspolozhenoj. The angle between the longitudinal axis of the end of the cutter 8 and the flat 9 surface of the face is

,

where H is the step helical surface loading of the blade 2;

Ri- the distance from the axis of the auger to the cutting edge of the cutter.

The angle between the longitudinal axis of the end of the cutter 8 and the line of cut is (102o). The distance between the cutting edge end of the cutter and flat 9 surface of the face is from 10 to 15 mm

Screw the Executive body works as follows.

The auger housing 1 together with the loading of the blade 2 and the annular lobovina 3 revolving transmits torque to the linear cutters 4, cuccovia cutters 6 and end cutters 8. When driving the mining machine along the face line cutters 4 destroy minerals from the ground and the roof of the stope, cuccovia cutters 6 are destroying the downhole portion of the reservoir, forming a straight face with a flat surface. End cutters 8 in the case of longitudinal movement of the mining machine along the face of destruction of the downhole portion of the reservoir do not participate and rotate idle. When you cut mining machines along with the longitudinal movement of the machine along the face appears front and its movement, since the movement of the downhole con the us cuccovia cutters 6 form a flat face, in a head-movement, respectively, of the cylindrical surface. The result of a complex movement of the mining machine when Samothrace is a toroidal surface 10, which its convex surface directed toward the ring lobovina 3 of the screw 1. The greater the ratio of the speed of the frontal motion to the speed of longitudinal movement, the more convex is 10 toroidal surface of the face. With the approaching 10 toroidal surface of the face to lobeline 3 of the screw 1 enter into the operation of the mechanical cutters 8, which layers ruin looming on the screw surface of the bottom of minerals and free path of the auger in the frontal direction. The acute angle formed between the longitudinal axis of the end of the cutter 8 and the plane tangent to the toroidal surface 10, reduces the forces acting on the cutter, by reducing unproductive friction cutter on the side surface of the toroidal slaughter.

At the location of the end of the cutter at an angle to the flat surface of the face defined on the proposed ratio, the angle of the cutter relative to the convex toroidal surface varies during one rotation of the auger 40 to 50othat is optimalisatie mine tests screws. If the angle is less than 40oyou will increase the required feed force and the cutter will be overloaded. If the installation angle is more than 50othen quickly blunts and loses its cutting ability the top of the cutter, with the cutter penetrates deeply enough to destroy the array and wears out quickly.

To increase the durability of the cutter is necessary to ensure uniform wear of the cutter from all sides. This can be achieved by turning the cutter during each operating cycle around its longitudinal axis and its implementation in the array each time the other lateral surface. The rotation can be carried out, if the forces acting on the cutter during the workflow, create torque. For this purpose, the cutters must be installed at an angle to the plane of cutting. Empirical research in Stopes found that the optimum value of the angle is 10 2o.

The installation distance of the end cutters from the flat surface of the face determined by the fact that during the formation of this surface cuccolini cutters there are traces of the cutting height up to 10 mm in Order to eliminate the friction face cutters on the tabs traces of cutting, enough to push the cutters from the surface to 10...15 mm Parabody end cutters.

1. Screw the Executive body, comprising a cylindrical casing, loading the blade with a screw surface, located on the side of the face ring lobovina, cutters with cutter holders mounted on the screw surface loading of the blade and the ring lobeline, characterized in that the Executive body provided with end cutters that are installed with the downhole side of the generatrix of the helical surface loading of the blade at an acute angle between the longitudinal axis of the end cutter and the plane tangent to the toroidal surface of the face, and face cutters are arranged with a gap between the cutting edge and the flat surface of the face.

2. Screw the Executive authority under item 1, characterized in that the angle between the longitudinal axis of the end cutter and the flat surface of the face is

< / BR>
where N - step helical surface loading blades;

Ri- the distance from the axis of the auger to the cutting edge of the cutter,

and the angle between the longitudinal axis of the end cutter and line cutting is (102o).

3. Screw the Executive authority under item 1 or 2, characterized in that the distance between the cutting edge end of the cutter and the flat surface of the face extending t

 

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