RU177388U1 - CLEANING COMBINE FOR THIN LAYERS - Google Patents

Abstract

Field of technology: mechanical engineering, the technical solution can be used in shearers with both remote and built-in feed systems for excavating rock from thin layers during lava mining by oblique rides. The essence of the technical solution: executive bodies with a vertical axis of rotation are attached to the opposite from the electric motor to the side of each drive gearbox so that the planes drawn through the vertical axis of rotation of each actuator are parallel to the longitudinal axis of the electric motor The technical result: minimizing the impact of bending forces from the cutting forces arising on the executive body on the flange and gear joints of the cutting drive units of the shearer. Consumer properties: increased load on the lava, i.e. increase in coal production. 1 s.p. f-ly, 3 ill.

Description

Technical field

The utility model relates to mechanical engineering and can be used in a shearer with a remote feed system for excavating rock from thin layers during lava mining by oblique rides.

State of the art

The prior art shearer KA200, which includes drive gears, an electric motor, two actuators with a vertical axis of rotation, which are located symmetrically at the ends of the machine on a sliding turret [1].

The disadvantage of this design is that the actuator is mounted on a retractable turret, the length of which is large enough, since the turret must overlap the conveyor groove, which creates a large length of the shoulder of the application of force from the cutting force that occurs on the actuator. As a result, the nodes in the chain: executive body - turret - gearbox - electric motor, quickly fail and are subject to frequent repairs.

The prior art, taken as the closest analogue, shearer, which includes auger actuators, drive gears, a two-sided flange electric motor located between the drive gearboxes and rigidly connected by flanges to their housings, a portal rigidly connected to the housing of the drive gearboxes, supporting beam mounted opposite the portal between the housing of the drive gearboxes and rigidly connected to them, made of two parts installed with a gap to the flanges of the drive p ductors, a preload device, built into the connection node of the portal with the drive gearbox and made with the possibility of imparting a force effect on the connecting structural elements, while the preload device is made in the form of a coupling mechanism associated with parts of the carrier beam with the possibility of changing the gap between them [ 2].

The disadvantage of this design is that the rotary gear is a shoulder, at the end of which an actuator is installed, on which bending forces from cutting forces are concentrated. Further, the force is transmitted from it to the drive gearbox, the connection of which with the electric motor is affected by the arising bending moments and the fasteners of the flange connection, for example, bolted, constantly work in tension, and between the flanges there is an increasing gap. This leads to distortions of the planes of the gearbox flanges relative to the motor flanges, which in turn leads to a loss of alignment of the motor shafts and input shafts of the drive gearboxes and deterioration of the engagement in the transmission elements. In the closest analogue, it is proposed to compensate for distortions and eliminate gaps by a special compensating device in the form of a clamping mechanism installed in a carrier beam specially divided into two parts for the possibility of installing a compensating device. As a result, the greater the cutting force we want to get by installing a more powerful electric motor, the more bending moment will appear on the shoulder, such as a rotary gearbox, the more powerful the compensating device will be, with which it will be necessary to constantly tighten the flanges.

A task

To create a rigid design of the combine, which will allow installing a sufficiently powerful electric drive for cutting the shearer and preserve the tendency to increase its power by how much it will allow the thickness of the removed layer of rock mass.

As a result of the solution of the task, a technical result will be obtained: this is to minimize the impact of bending forces from cutting forces arising on the actuator on flange joints and gearing in the transmission elements of the cutting shearer drive by changing the design of the shearer without using special compensating devices.

Achieving the technical result will provide consumer properties of the invention: increasing the load on the lava, simplifying the design of the harvester, which reduces maintenance costs.

Utility Model Essence

In a prior art shearer, which includes at least two actuators with a vertical axis of rotation (1) and (2), a two-sided electric motor (5), to which drive reducers (3) and (4) are attached, housings (3.1) and (4.1) which are connected by the portal (6) and the supporting beam (7), located opposite the portal between the cases (3.1) and (4.1) of the drive gearboxes (3) and (4), in accordance with the claimed technical solution it is proposed:

- actuators with a vertical axis of rotation (1) and (2), attach to the opposite side of the motor (3.2) and (4.2) of the housing (3.1) and (4.1) of each drive gearbox (3) and (4), thus so that the planes V ¹ _vert and V ² _vert , drawn through the vertical axis of rotation (O ₁ ) and (O ₂ ) of each actuator parallel to the longitudinal axis (X) of the motor (5), do not protrude beyond the transverse dimension (A) of the latter.

In addition, it is proposed:

- the plane V ¹ _vert and V ² _vert , drawn through the vertical axis of rotation (O ₁ ) and (O ₂ ) of each executive body, formed a single plane.

The causal relationship between the technical result and the new essential features is illustrated by the following. The connection of the executive body directly to the drive gearbox and the exclusion of the rotary gearbox from the shearer design eliminates the large arm of the bending forces from the cutting forces arising on the actuator and significantly strengthens the structure. The location of the rotation axes of the two actuators so that the planes V ¹ _vert and V ² _vert , drawn through the vertical axis of rotation (O ₁ ) and (O ₂ ) of each actuator parallel to the longitudinal axis (X) of the electric motor, do not protrude beyond the transverse dimension ( A) of the latter, makes efforts from cutting forces at the junction of the electric motor with the gearbox and the gearbox with the executive body not bending, but compressing. The implementation of the planes V ¹ _vert and V ² _vert , drawn through the vertical axis of rotation (O ₁ ) and (O ₂ ) of each actuator, as a single plane, generally reduces the amount of bending effort to almost zero. Thus, turning the bending forces into compressive, the claimed technical result is achieved: the impact of bending forces from cutting forces on the actuator on the flange joints of the drive units is minimized, which in turn minimizes the risk of misalignment of the motor shafts and input shafts of the drive gearboxes and deterioration of gearing in transmission elements. As a result, this will allow us to solve the problem: to establish a sufficiently powerful electric motor and maintain the tendency to increase its power by as much as the power of the removed coal bed allows and to provide technical solutions for consumer properties: increasing the load on the lava, i.e. increase in coal production.

Brief Description of the Drawings

The essence of the technical solution is presented in the drawings, where:

- in FIG. 1 shows a general view of the harvester - top view;

- in FIG. 2 shows a general view of a harvester with a remote feed system mounted on a conveyor;

- in FIG. 3 shows a general view of a combine with an integrated feed system.

1 - executive body with a vertical axis of rotation;

2 - executive body with a vertical axis of rotation;

3-drive gear;

3.1 - drive gear housing;

3.2 - the opposite side of the gearbox housing from the electric motor;

4 - drive gear;

4.1 - drive gear housing;

4.2 - opposite from the electric motor side of the gearbox housing;

5 - electric motor;

6 - portal;

7 - supporting beam;

O ₁ - axis of rotation of the executive body;

O ₂ - axis of rotation of the executive body;

V ¹ _vert - a plane drawn through the axis of rotation About _{1 the} executive body;

V ¹ _vert - a plane drawn through the axis of rotation About ₂ Executive body;

X is the longitudinal axis of the electric motor;

A is the transverse dimension of the electric motor.

Industrial applicability

The implementation of the proposed technical solution is as follows.

The shearer consists of a two-sided electric motor (5), to which drive gears (3) and (4) are connected. A portal (6) and a supporting beam (7) mounted opposite to the portal (6) between the cases (3.1) and (4.1) of the drive reducers (3) and (4) are rigidly attached to the housings of these gearboxes (3.1) and (4.1). Executive bodies (1) and (2) with a vertical axis of rotation (O ₁ ) and (O ₂ ) are connected directly to the housings (3.1) and (4.1) of the corresponding drive gearbox (3) and (4) from the output shaft of the gearbox, t .e. on the opposite side of the motor (3.2) and (4.2). Moreover, the proposed design of the harvester is such that after connecting the actuators (1) and (2) with a vertical axis of rotation, they are arranged so that the planes V ¹ _vert and V ² _vert , drawn through the vertical axis of rotation (O ₁ ) and ( O ₂ ) of each individual executive body parallel to the longitudinal axis (X) of the electric motor (5), do not protrude beyond the transverse dimension (A) of the electric motor (5). In practice, most often shearers with vertical actuators are designed so that the planes V ¹ _vert and V ² _vert , drawn through the vertical axis of rotation (O ₁ ) and (O ₂ ) of each individual actuator parallel to the longitudinal axis (X) of the electric motor (5 ) are equidistant from this axis, i.e. the plane V ¹ _vert and V ² _vert form a single plane (Fig. 1). The figures give an example of just such a performance of a shearer for thin formations.

The inventive design of a shearer for thin seams makes the efforts from cutting forces not bending, but compressive, which allows only by changing the design without additional compensating devices to solve the problem - to install a more powerful electric motor, the dimensions of which are limited only by the thickness of the removed coal seam. The claimed technical solution can be used both in shearers with external (Fig. 2), and with an integrated feed system (Fig. 3).

Information sources

1. Lectures on “Technology and equipment for mining” for AK&T (16 hours), pp. 14-15 http://gmi.nmu.org.ua/ua/kadrj/kiahar/kuhar_ua.files/togv/ Lecture 5 Treatment narrow gripping combines and plows.pdf

2. Patent of Ukraine No. 87607, priority of December 26, 2007, publ. July 27, 2009, bull. No. 14.

Claims (2)

1. A shearer for thin layers, which includes at least two actuators with vertical axes of rotation (1) and (2), a two-sided electric motor (5), to which drive reducers (3) and (4) are attached, housings (3.1) and (4.1) which are connected by the portal (6) and the supporting beam (7), located opposite the portal between the cases (3.1) and (4.1) of the drive gearboxes (3) and (4), characterized in that the actuators are vertical rotation axes (1) and (2) attached to the side (3.2) and (4.2) of the housing (3) opposite from the electric motor .1) and (4.1) of each drive gearbox (3) and (4), are arranged so that the planes V ¹ _vert and V ² _vert , drawn through the vertical axis of rotation (O ₁ ) and (O ₂ ) of each actuator in parallel the longitudinal axis (X) of the motor (5), do not protrude beyond the transverse dimension (A) of the latter. 2. A shearer for thin layers according to claim 1, characterized in that the planes V ¹ _vert and V ² _vert , drawn through the vertical axis of rotation (O ₁ ) and (O ₂ ) of each actuator, make up a single plane.

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