RU191620U1 - CRUSHING DEVICE - Google Patents

Abstract

Field of technology: mechanical engineering. Direct application: in roll crushers used in coal, mining and other engineering industries. The essence of the utility model: the safety device (5) is mounted on the shaft (2) with the possibility of transmitting torque to the crushing drum (4) and made in the form of a friction clutch in which the clutch is normally closed by the clamping mechanism. Technical result: maintaining the integrity of the design of the safety device when the kinematic connection of the gearbox with the crushing b Rabanne in case of excess load to the last. Achieving the claimed technical result will provide the technical solution with consumer properties: the possibility of multiple use of the safety device, as well as independent maintenance of the safety device from the gearbox.

Description

Technical field

The technical solution relates to mechanical engineering, namely to mine crushing equipment and can be used in roller crushers used in coal, mining and other engineering industries.

State of the art

Known from the prior art, selected as the closest analogue, a crusher for a crushing unit. The crusher is presented in the form of rigidly fixed to the engine frame and axis, on the bearings of which the crushing drum is mounted, rigidly connected to the shaft located inside the axis. The shaft is connected to the planet carrier of the planetary gear, the sun gear of which is made in the form of a gear shaft rigidly connected to the pulley, which is kinematically connected by a belt drive to the engine pulley. The planetary gear safety device is a sun gear shaft made with a radial groove.

The diameter of the radial groove of the shaft of the sun gear is reduced to a size sufficient to ensure its strength during normal operation of the crusher and its destruction, when a critical load is reached in the groove zone during jamming of the crushing drum. When the sun gear shaft is destroyed, the kinematic connection of the planetary gear with the pulley is broken, which prevents the failure of the entire planetary mechanism. The sun gear is replaced through a removable pulley cover. [one]

The disadvantages of the closest analogue are that when the sun gear shaft is destroyed, not all parts of the destroyed shaft section can be removed and, after replacing the sun gear, remain in the area of the planetary mechanism, in addition, when replacing the sun gear in mine conditions, it may get the pulley inside the planetary mechanism of the pulley of the crushing drum.

The technical solution is based on the task:

create a reliable safety device that will not collapse if the load on the crushing drum is exceeded, for example, when it stops abruptly (jamming).

As a result of solving this problem, a technical result will be obtained, which consists in maintaining the integrity of the design of the safety device when the kinematic connection of the gearbox with the crushing drum is broken, in case the load on the latter is exceeded.

Achieving the claimed technical result will provide the technical solution with consumer properties: the possibility of reusable use of the safety device, as well as independent maintenance of the safety device from the gearbox.

Disclosure of a technical solution

In the crushing device that contains the drive, the frame (6) is rigidly connected to the axis (1), on which the crushing drum (4) is mounted, with the possibility of rotation, the shaft (2) of which is kinematically connected with the gearbox (9, 10, 11) the drive and the safety device (5) of the gearbox (9, 10, 11) of the drive, it is proposed that the safety device (5) be mounted on the shaft (2), with the possibility of transmitting torque to the crushing drum (4), and made in the form of a friction couplings in which the clutch is normally closed by the clamping mechanism (520, 521, 522, 523, 524).

The above essential features of a technical solution, different from the closest analogue, are necessary and sufficient in all cases to which the scope of legal protection of a utility model applies.

In addition, it is proposed:

- clutch the friction clutch to perform multi-plate (518, 519);

- hold down the clamping mechanism in the form of a disk-shaped cage (522) connected to the drum and mounted coaxially to the shaft (2), in which spring elements (523) are fixed around the perimeter, fixed by a clamping washer (521) connected to the cage (522) by adjustment elements (524) the stress of the spring elements (523).

The technical solution is illustrated by an example, the implementation of which is not the only possible, but clearly demonstrates the possibility of achieving the technical result of the proposed new set of essential features.

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

- in FIG. 1 shows a cross-sectional view of a general view of a crushing device;

- in FIG. 2 shows a longitudinal section through a gearbox safety device mounted on a shaft in a crushing drum;

- in FIG. 3 shows a longitudinal section through a safety device of a gearbox.

Brief Description of the Drawings

1 - axis

2 - shaft;

3 - engine;

4 - crushing drum;

5 - safety device;

6 - frame;

7 - flywheel (pulley);

8 - a pulley;

9 - satellite;

10 - sun gear;

11 - drove;

12 - belt drive;

13 - the bearing;

14 - the bearing;

15 - cover;

516 - the hub;

517 - a glass;

518 - clutch disc;

519 - clutch disc;

520 - pressure washer;

521-clamping washer;

522 - disk-shaped clip;

523 - spring element;

524 - adjustment element (bolt);

525 - a bolt;

526 - a bolt;

527 - hole.

Industrial applicability

The crushing device is shown by the example of a mine crusher of a downhole scraper conveyor (Fig. 1), which is installed on the transition section of the discharge part of the scraper conveyor, while the position of the crushing drum above the chute of the scraper conveyor is regulated with a hydraulic jack (not shown in the figures).

In the crusher, on the frame (6), the axis (1), on the bearings (14) of which the crushing drum (4) is mounted, is rigidly fixed. The shaft (2) of the crushing drum (4) is mounted on bearings (13) inside the axis (1) and connects the gearbox (represented by the planetary type) with its safety device (5), which is installed inside the crushing drum (4) and is protected from external influences by a removable a lid (15) fixed to the end of the crushing drum (4).

The drive of the crushing device is presented in the form of a set of elements, namely: a motor (3) rigidly fixed to the frame (6), the pulley (8) of which is kinematically connected by a belt drive (12) to the flywheel (7), which is rigidly connected to the sun gear ( 10) gearbox. The carrier (11) of the satellites (9) of the gearbox is connected to the shaft (2) of the crushing drum (4).

The safety device (5) is presented (Fig. 2) in the form of a multi-plate friction clutch, which contains a hub (516) rigidly mounted on the shaft (2) with clutch discs (519) that interact with the clutch discs (518) of the cup (517), a pressure washer (520) installed between the extreme clutch disc (518) and the clamping washer (521) of the clamping mechanism, which together with the glass (517) is rigidly connected by a bolt (525) to the crushing drum (4).

The clamping mechanism of the friction clutch is presented in the form, connected by a bolt (526) to the cup (517), of a cage (522) disk-shaped with a central through hole (527), in which spring elements (523) are fixed around the perimeter, fixed by a clamping washer (521), connected to the clip (522) by adjustment elements (524), which are presented in the form of bolts. A through hole (527) is made in the ferrule (522), which provides access for fixing the hub (516) to the shaft (2).

The number of pairs of clutch discs (518 and 519) in the safety device (5) depends on the drive power of the crushing device, i.e. the larger the engine power (3), the greater the number of clutch discs (518 and 519) and, accordingly, the greater the power of the crushing device.

The necessary torque settings, which are transmitted from the shaft (2) to the crushing drum (4), are made depending on the characteristics of the installed engine (3) and the number of pairs of clutch discs (518 and 519), by changing the force of the normally closed clutch when clamped or unclenched spring elements (523) with adjustment elements (524), which allows you to change the pressure of the thrust washer (520) on the clutch disc package (518 and 519).

At the moment of a sharp stop of the crushing drum (4), from the external reaction of the rock mass, a negative torque arises, which counteracts the torque of the shaft (2) and exceeds the allowable load limit on the clutch of the friction clutch, resulting in between the clutch discs (518 and 519) hard connection is broken. The shaft (2) overcomes the clutch of the friction clutch and rotates until the engine (3) automatically shuts off, as a result of which the shock load is removed from the satellites (9) and the sun gear (10) of the gearbox, and the safety mechanism (5) of the gearbox maintains the integrity and the possibility of further use.

It is possible to transfer torque from the engine (3) to the shaft (2) from a small-sized gearbox without using a belt drive (12), which will also make it possible to use a friction clutch as a safety lock for a small-sized gearbox in case of an emergency stop (jamming) of the crushing drum ( four).

Information sources:

1. Patent PL 209268 B1, priority 04.09.2006

Claims (3)

1. A crushing device containing a drive, a frame (6), rigidly connected to the axis (1), on which the crushing drum (4) is mounted with the possibility of rotation, the shaft (2) of which is kinematically connected with the gearbox (9, 10, 11) of the drive and a safety device (5) of the drive gear (9, 10, 11), characterized in that the safety device (5) is mounted on the shaft (2) with the possibility of transmitting torque to the crushing drum (4) and is made in the form of a friction clutch, which the clutch is normally closed by the clamping mechanism. 2. Crushing device according to claim 1, characterized in that the clutch of the friction clutch is multi-plate. 3. A crushing device according to claim 2, characterized in that the clamping mechanism is made in the form of a disk-shaped cage (522) connected to the drum and mounted coaxially to the shaft (2), in which spring elements (523) are fixed around the perimeter and fixed by a clamping washer (521 ) connected to the clip (522) by adjustment elements (524) of the voltage of the spring elements (523).

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