SU1610020A1 - Cutting unit of shaft-sinking machine - Google Patents

Abstract

This invention relates to a mining technique, in particular to trunnion harvesters. The goal is to increase the productivity of the combine by destroying the rock pillars between the cuts of the bit. The actuator includes a drive, a gearbox 3, kinematically connected to a coaxially intermediate shaft 4 and a carrier / B / 5. The latter and the drive shaft 14 are kinematically connected with the gearbox 6 of the working organ. Symmetrically to the axis B 5 and the output shafts 7 are inclined to it with the bits 8, which are equipped with peripherals 9 on the periphery. Symmetrically between the bits 8, at the same angle of inclination to the axis B there are two barrel-shaped tools. They are rigidly fixed to B by means of obliquely mounted brackets 10 and discs 12 mounted on shafts 11. The cutting edge of each disc 12 is removed from the shaft axis 11 by a distance determined by a given formula. Supply of the executive body of the combine to the bottom is carried out by hydraulic cylinders. Formed during operation and feeding by hydraulic cylinders to the bottom of bits 8, as a result of intersection of hypocycloid of cones 9, an uneven mesh of rock destruction is cut by cutting edges of discs 12. Barrel-shaped tools are machined by bottomhole 14 of the barrel simultaneously with bits 8, cutting the rock pieces into smaller mesh. 3 il.

Description

The invention relates to a mining technique, in particular, to stem-borne combines.

The purpose of the invention is to increase the productivity of the combine by destroying the rock pillars between the cuts of the bits.

Figure 1 shows the structural-kinematic diagram of the executive body of a barrel-hole combine in frontal projection; figure 2 is the same, side view; in FIG. 3, view A in FIG. 2.

The trunking body K01m5aina includes an electric motor 1 with a hydraulic clutch 2, a reducer 3 of the main drive, an intermediate shaft 4 and a carrier 5. arranged coaxially and interconnected by a kinematically reducer 6 of the operating element, two inclined to the axis of the carrier of the output shaft 7 with bits 8. equipped with peripherals with cones 9. Symmetrically between the bits 8 at the same angles of inclination to the axis of the drive 5, which have output shafts 7, two barrel-shaped tools are placed, rigidly fixed on the driver 5 by means of an inclined PARTICULAR brackets 10 formed in a shaft 11 mounted on sets of disks 12. Power cylinders 13 serve for supplying the actuator body 14 combine to slaughter.

Regardless of the installation of the discs 12 on the shafts 11, certain distances must be maintained from the axes of the shafts 11 to the cutting edges of the discs 12. These distances 1 | are determined by the formula

f | r + (Nef- ((0,5Dg-b (a / cos y)) / tgy) - S P | tgO, 5) 3i),

i 1

where I is the minimum distance of the cutting edge of the peripheral (extreme) disk from the shaft axis (structurally accepted), mm;

O.SDg + - Sun (0.5 Dg) 2 + l-cozy

H Il9UI do

- the radius of the spherical surface 1 zabo formed by chisels, mm;

Dg - bit diameter, mm;

a is the distance from the axis of the carrier to the nearest bit (radius of the core of the rock formed along the axis of the shaft), mm;

y is the angle of inclination of the shafts of bits and brackets of barrel-shaped tools to the carrier axis, hail;

R | - pitch of installation of the disc on the length of the shaft of the barrel-shaped tool, starting from the inclined axis of its bracket in both directions (or from the middle of the shaft in both directions),

About Z P | O.SDg, mm,

, 2 ..., k is the number of cutting tools along the rod length, starting from the inclined axis of the barrel-shaped tool bracket in both directions (or from the middle of the shaft to both sides |), pcs.

thirty

I k

EPI

I 1

0.01745 Ret

- the angle corresponding to the step P | installation of the 1st disk on the shaft, deg.

35 The executive body of the stem-body combine works as follows.

From electric motor 1 with hydraulic clutch 2 via gears of reducer 3, chapters 40

drive get rotation coaxially

The intermediate shaft 4 and the carrier 5 are located. The intermediate shaft 4, through the gears of the gearbox b of the cutting element, transmits rotation to its output shaft 7 inclined to the axis 5, which are in the gearbox housing 6. along with relative movement (relative to the gearbox housing 6), simultaneously with the bits 8 mounted on them, a portable rotational movement is also made at a speed of 5, because the gear case 6 is rigidly connected to the carrier 5. As a result, the cone 9 bits 8 make a complicated (planetary) movement, and tr The patterns of their cutting edges interacting with rocks on the surface of the bottom hole passable are hydrocycloids, since the directions of rotation of the output shafts 7 and the carrier 5 are opposite. The disks 12, installed with a certain pitch along the length of the shafts 11, which, in turn, are fixed in the brackets 10, perform a simple rotational movement with the speed of the carrier 5, since the latter and the brackets 10 are rigidly connected to each other. Formed during operation and feeding by power cylinders 13 to bottomhole 14 bits 8, as a result of intersection of hypocycloid cones 9, an uneven mesh of rock destruction is cut by cutting edges of discs 12. At the same time, barrel-like tools, like toothed combs or harrows, process bottomhole 14 of the barrel simultaneously with bits 8, cut pieces of rock in a grid of destruction into smaller ones. Depending on the strength of the rocks being destroyed and the size of the pillars in the mesh of destruction formed by chisels 8, the discs of 12 barrel-shaped tools can be installed with a different step along the length of the rods 11 taking into account the known relationships between depth and rock cutting step. This approach will provide additional destruction of only large pillars of the rock in the fracture grid, and small ones will not be crushed even more. When installing the disks 12 at the ends of the shafts 14 from the core 15, their work also provides additional trimming of the core. Barreled tools also process (cut off) rock scallops on the side walls of the trunk and increase the rigidity of the entire executive body, as a result of which its stability in the face increases when the combine is in operation.

driven to the axis of the carrier and symmetrically arranged with respect to the output shaft with bits and power feed cylinders, characterized in that, in order to increase productivity by destroying the pillars of the rock between the cuts of the bits, it is equipped with two rigidly fixed on the carrier between the shafts with bits. by means of obliquely mounted brackets with barrel-shaped tools, each of which is made in the form of a shaft with a set of disks mounted on it, with the cutting edge of each disk removed from the axis of the shaft II, defined by the formula

fi H- (Yasf - ((0,5Dg-l- (a / cos Y)) / tgy) - - Ё PitgO, 5y9i),

i 1

where I is the minimum distance of the cutting edge of the peripheral (extreme) disk from the shaft axis, mm:

- radius of the bottom surface, formed by bits, mm;

Dg - bit diameter, mm;

a is the distance from the axis of the carrier to the nearest bit in the radial direction (radius of the core of the rock formed along the axis of the shaft a), mm;

y is the angle of inclination of the shafts of bits and brackets barrel tools, degrees:

Pi is the installation step of the i-ro disk along the shaft of the barrel-shaped tool, starting from the inclined axis of its bracket to both sides (or from the middle of the shaft to both sides),

I k O 2 Pi 0.5 Dg, m m;

I 1

i 1.2- the number of disks along the shaft,

starting from the inclined axis of the barrel-shaped tool bracket in both directions (or from the middle of the shaft in both directions), pcs;

Claims (1)

Claims of the invention The executive body of a stem bore combine, including a drive, a gearbox, kinematically connected to a coaxially arranged intermediate shaft and carrier, is kinematically connected with a gearbox of a working organ two inclinations D i k 2 Pi i 1 0.01745 Yasf - the angle corresponding to the step Pj of the installation of the 1st disc on the shaft, degrees. 12 P P d U 12 1Z /four 15 Phage.Z