RU2498063C1 - Heading machine - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: heading machine contains actuating device, support lifter, caged platform, electric equipment, control post, feeding mechanism, conveyor and chassis. In pivot mechanism located at chassis and driven by swing hydraulic cylinders spherical roller bearing is installed at bearing axis inside two-sided plain thrust bearing. Plain thrust bearing consists of assemblies (two at each side) segments in circumferential direction; segments are made of wear-resisting steel and are fixed by sunk screws.

EFFECT: decrease in dimensions and increase in service life of heading machine.

4 dwg

Description

The invention relates to the field of mining and can be used in the construction of mining machines.

The known PK-ZM roadheader (see "Roadheaders" Y.I. Bazer, V.I. Krutilin, Yu.L. Sokolov, Moscow, Nedra, 1974. p. 101, 102), the rotary device of which consists of a support axis mounted on the main frame of the combine, and a rotating frame with brackets.

The pivoting frame is mounted on the support axis using a spherical roller bearing and a cast iron sleeve.

The use of a spherical roller bearing in this rotary device, which receives axial and radial load, and a cast-iron sleeve located at some distance from the spherical roller bearing and which receives radial load, does not allow to achieve the technical result indicated below.

The presence of a double load (axial and radial) leads to rapid wear of a spherical roller bearing.

This rotary device also has large dimensions due to the remoteness of the cast iron sleeve from the spherical roller bearing.

The closest technical solution adopted for the prototype is a mountain harvester according to patent No. 2168015 "Mountain combine", priority 01.09.1999, class. E21C 27/24, E21A 13/04, including the running gear, slewing ring, actuator, feeder, conveyor, magnetic station, oil station, oil tank. In the slewing ring there are two thrust roller bearings.

The disadvantage of this design is the large dimensions of the support-turning column vertically due to the remoteness of the bearings from each other, as well as the fact that two thrust roller bearings can absorb a lower total load. Therefore, the working resource of the slewing column of the known prototype is small.

The objective of the present invention is to reduce the size and increase the service life of a roadheader.

Comparison of the declared tunneling machine, containing the executive body, the hoist, the platform with a fence, electrical equipment, the control place of the combine, feeder, conveyor, chassis, with the prototype allows us to conclude that the latter does not have signs similar to the significant distinguishing features of the declared tunneling machine:

- in the rotary device located in the running gear and driven by the turning hydraulic cylinders, the spherical roller bearing is mounted on the support axis inside the double-sided thrust sliding bearing;

- thrust sliding bearing consists of four rows (two rows on each side) located around the circumference of wear-resistant steel segments and secured with countersunk screws.

The set of features of the claimed technical solution has a difference from the prototype and the known analogue and does not follow explicitly from the studied prior art, therefore, the authors believe that the object is new and has an inventive step.

These signs are interconnected so that when one of them is eliminated, the technical result obtained by the invention disappears.

The invention also represents a certain step in the development of technology and is progressive, as it allows to reduce the dimensions and increase the working life of a roadheader.

A roadheader in which the invention is claimed may find wide application in the mining industry, i.e. is an industrially applicable technical solution.

The achievement of the technical result when applying the declared tunneling machine, comprising an executive body, a hoist, a platform with a guard, electrical equipment, a control point of the combine, a feeder, a conveyor, a running gear, is ensured by

- in the rotary device located in the running gear and driven by the turning hydraulic cylinders, the spherical roller bearing is mounted on the support axis inside the double-sided thrust sliding bearing;

- thrust sliding bearing consists of four rows (two rows on each side) located around the circumference of wear-resistant steel segments and secured with countersunk screws.

This arrangement of bearings made it possible to significantly reduce the dimensions of the rotary device and the roadheader.

The use of a thrust sliding bearing made it possible to relieve the spherical roller bearing from axial load and, accordingly, increase its service life. The use of four rows of circumferential segments made of wear-resistant steel also increased the service life of the rotary device and the roadheader.

The essence of the claimed invention is illustrated by the accompanying drawings (figure 1, figure 2. Figure 3, figure 4).

The drawing (Fig. 1) shows a roadheader that contains an actuator 1, a hoist 2, a platform with a guard 3, electrical equipment 4, a control point for the combine 5, feeder 6, conveyor 7, and chassis 8.

In the drawings (FIG. 2, FIG. 3, FIG. 4), a rotary device is shown which comprises a rotary plate 9, a cover 10, a plain bearing housing 11, a spherical roller bearing 12, a support axis 13, a base 14, bolts 16 and 17, seals 18 and 19, pins 21 and 22, high pressure sleeve 23, segments 24, countersunk screws 25.

The rotary device is mounted on the main frame of the combine 15 and secured using the axes 20 (figure 2).

In front of the turntable 9 (FIG. 2), there are two eyes 28 (FIG. 1) for installing the actuator 1 (FIG. 1) and two eyes 29 (FIG. 1) for installing two lift cylinders 26 (FIG. 1) executive body. In the middle part of the turntable 9 (FIG. 2) there are two eyes 30 (FIG. 2) for installing the turning cylinders 27 (FIG. 1).

The rotary plate 9 (figure 2) is mounted on the housing of the sliding bearing 11 (figure 2) with the help of pins 21 (figure 2) and secured with bolts 16 (figure 2). The pins 21 (figure 2) are pressed into the housing of the sliding bearing 11 (figure 2).

The segments of wear-resistant steel 24 (Fig. 3) are mounted on the cover 10 (Fig. 2), on the supporting surfaces of the plain bearing housing 11 (Fig. 2), on the supporting axis 13 (Fig. 2).

The segments are arranged around a circle with a certain gap (Fig. 4), and each segment is secured by six countersunk screws 25 (Fig. 3).

There is a guaranteed clearance between the upper two rows of segments.

The pins 22 (figure 2) are pressed into the support axis 13 and the base 14 (figure 2) and are necessary to install the cover 10 and the support axis 13 (figure 2).

The supporting axis 13 (figure 2) with a spherical roller bearing 12 (figure 2) mounted on it, a bearing housing 11 (figure 2) and a cover 10 (figure 2) are attached to the base 14 with bolts 17 (figure 2). For this, in the base 14 (figure 2) there are threaded holes.

The high pressure sleeve 23 (FIG. 2) is screwed into the support axis 13 (FIG. 2) and serves to supply grease under pressure to the bearing cavities.

The seal 19 (figure 2) is made of rubber and prevents leakage of lubricant from the bearing cavities. The seal 18 (figure 2) is made of felt and protects the bearing cavity from the ingress of mechanical particles.

Claims (1)

A roadheader containing an actuator, a hoist, a platform with a guard, electrical equipment, a control place for the harvester, a feeder, a conveyor, a running gear, characterized in that a spherical roller bearing is mounted on a support axis inside a rotary device located in the running gear and rotated by the rotation cylinders; two-way thrust bearings, and thrust bearings consists of four rows (two rows on each side) of circumferential segments of wear-resistant steel and fixed countersunk screws.

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