UA116945U - SCRAPING CONVEYOR TENSION DEVICE - Google Patents

Abstract

The device for tensioning the chain of the mine scraper conveyor includes a housing (1), which houses a friction mechanism (17), which interacts with the pressure element (5), the shaft (3) with the elastic element (4), the cover (2), the actuator of the pressure element , and the friction mechanism (17) is made in the form of a package of friction disks mounted with the possibility of axial movement, the elastic element (4) is kinematically linked to the shaft (3) and the pressure element (5), the actuator of the pressure element contains mounted in the cover (2 ) piston (6), which interacts with the pressure element (5), all updated in the lid (2) with the possibility of axial movement of the lock (7) of the piston (6), made in the lid (2) pressure chamber (8), which is limited to the surfaces of the piston (6) and its rod (6.1) and hydraulically connected with pressure head unit (10) channel (9) made in the cover (2).

Description

The technical solution belongs to mechanical engineering, namely to conveyor transport, and can be used in the drive stations of the mine scraper conveyor.

Known from the prior art, selected as the closest analogue, installed on the drive unit of the scraper conveyor, a device for tensioning the chain of the scraper conveyor, which includes a housing of two halves (upper and lower), which is fixed to the flange of the reducer on the opposite side of the output shaft of the reducer, a brake disc with a hub on the slots, located on the shaft of the device, which is in contact with the stationary brake friction pads of the body and the movable brake fFriction pads hinged on the lever. Movable brake friction pads are hinged with the help of forks on separate rotary levers, which are connected to the axes of brackets fixed on the body and a nut, when moving, the brake disk is braked or released (11.

The disadvantages of the closest analogue are that the friction mechanism of the chain tensioning device is designed for the torque of the drive unit gearbox shaft, which is significantly lower than the torque of the conveyor shaft, which does not allow moving the chain tensioning device to the opposite side of the frame of the drive section and thus increases the size and the mass of the main drive unit of the conveyor, which affect the skew of the frame of the drive section in weak soils and especially when moving the conveyor.

The technical solution is based on the following task: to develop the design of the device for tensioning the traction chain, which will allow to increase the force of the friction mechanism in accordance with the braking moment of the conveyor shaft, as well as to some extent balance the main drive unit of the conveyor in terms of dimensions and weight.

As a result of solving the task, a technical result will be obtained, which consists in ensuring the possibility of more smoothly regulating the tensioning process of the traction chain and stabilizing the force of fixing the drive shaft of the conveyor.

Achieving the stated technical result will provide the technical solution with consumer properties: improving the state of safety equipment and increasing the service life of the traction chain.

In the device for tensioning the chain of the mine scraper conveyor, which contains a body (1), in which a friction mechanism (17) is placed, which interacts with a pressure element (5), a shaft (3) with an elastic element (4), a cover (2), drive of the pressure element, friction is offered

The mechanism (17) should be made in the form of a pack of friction discs installed with the possibility of axial movement, the elastic element (4) should be kinematically connected to the shaft (3) and the pressure element (5), the drive of the pressure element should be made in the form installed in the cover ( 2), the piston (6), which interacts with the pressure element (5), the retainer (7) of the piston (6) installed in the cover (2) With the possibility of axial movement made in the cover (2), the pressure chamber (8), which is limited by the surfaces of the piston (b) and its rod (6.1), and is hydraulically connected to the pressure unit (10) through the channel (9) made in the cover (2).

The essential features of a utility model listed above, different from the closest analogue, are necessary and sufficient in all cases covered by the scope of legal protection of a utility model.

In addition, it is proposed: - pressure block (10), to be made in the form of a reversible hand pump (10.1) hydraulically connected to the container (10.2). - The retainer (7) of the piston (6) should be made in the form of an axis (7.1) with a lever element (7.2), which is connected to the cover (2) by a threaded connection.

The causal relationship between the new essential features of the technical solution and the obtained technical result is explained as follows.

The smooth adjustment of the tension force of the chain by the conveyor shaft (14) is carried out due to the gradual build-up and regulation by the reversible pump of the pressure in the pressure chamber (8) of the working fluid, under the action of which the piston (b) gradually increases to the required force on the pressure element (5), while a package of friction discs under the influence of a pressure element (5) distributes the load of the torque of the shaft (3) by a set of clutches of friction discs, which significantly reduces the critical load sufficient to break the traction chain.

The smooth distribution of tension of the traction chain in the idle and working branches of the conveyor, after its tension, is ensured by using the pressure of the working fluid in the pressure chamber (8), because, after the axis (7.1) of the piston retainer (7) is retracted to its initial position, the pressure of the working of liquid does not allow to sharply weaken the interaction between the pressure element (5) and the pack of friction discs, it allows the shaft (14) to be smoothly debraked in the reverse order and to obtain tension of the traction chain in the upper and lower branches of the conveyor, which will affect the optimal distribution of the load of the traction chain and, accordingly will increase the time of its stretching and sagging during the operation (516) of the conveyor.

Stabilization of the fixing force of the conveyor shaft (14) is provided by the piston retainer (7), which closes the rod (6.1) of the piston (b) when the axis (7.1) is moved along the thread in the hole (2.1) and thereby limits the movement of the piston (b), which prevents the reduction of the force of the pressure element (5) when the pressure in the pressure chamber (8) is lost.

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

The essence of the claimed technical solution is presented in the drawings, where: - in Fig. 1 shows a cross-section of the drive section with the drive block and the chain tensioner installed oppositely; - in fig. 2 shows a longitudinal section of the chain tensioning device.

Brief description of drawings 1 - body; 1.1 - flange; 1.2 - bolt connection; 1.3 - bearing; 2 - cover; 2.1 - through hole;

Z - shaft; 3.2 - output part of the shaft; 4 - elastic element; 5 - pressure element; 6 - piston; 6.1 - rod; 7 - piston retainer; 7.1 - axis; 7.2 - lever element; 8 - pressure chamber; 9 - channel;

Ko) 10 - pressure block; 10.1. - reversible manual pump; 10.2 - container; 10.3 - pipeline; 11 - manometer; 12 - channel; 13 - toothed sleeve; 14 - conveyor shaft; 15 - drive section frame; 16 - main drive unit; 17 - friction mechanism (hereinafter a package of friction disks).

Industrial suitability

The body (1) with the cover (2) and the pressure block (10) of the device for tensioning the traction chain of the scraper conveyor are installed opposite the main drive unit (16) outside the frame of the drive section (15) of the scraper conveyor (Fig. 1). The direct kinematic connection of the device for tensioning the chain with the conveyor shaft (14) is made in the form of a splined connection of the output part (3.2) of the shaft (3) and the toothed sleeve (13) (Fig. 1). The body (1) of the device for tensioning the traction chain is fastened by bolting (1.2) its flange (1.1) to the frame of the drive station (15), while the pressure block (10) can be placed both on the drive station (15), and near it (Fig. 1). The friction mechanism of the device for tensioning the traction chain is presented in the form of a package of friction disks (17) placed in the housing (1), some of which are installed on the inner surface of the housing (1) with the possibility of axial movement, and the others are installed on the shaft (3) with the possibility of axial movement moving. The quantitative configuration of the friction disc package depends on the power of the main drive unit (16), i.e., the greater the power, the greater the number of friction discs.

To tension the traction chain, the conveyor shaft (14) is pre-locked by means of fixing the shaft (3) installed in the bearing (1.3) in the housing (1). By means of the manual reversing pump (10.1) of the pressure unit (10) from the container (10.2), the working fluid through the pipeline (10.3) and the channel (9) enters under pressure into the pressure chamber (8) of the cover (2). The pressure value of the working fluid in the pressure chamber (8), necessary to reduce the torque on the shaft (3), is displayed on the pressure gauge (11), which is fixed in the channel (12) of the cover (2) connected to the chamber (8) ). The pressure indicators on the manometer (11), necessary to create the optimal force of the piston (b), are calculated depending on the characteristics of the package of friction discs (17) and the power of the main drive unit (16).

The piston (6) under the pressure of the working fluid rests against the pressure element (5), which presses the pack of friction disks (17), as a result of which the shaft (3) is fixed. After that, the piston lock (7) is activated. By rotating the lever element (7.2), presented in the form of a flywheel, the axis (7.1) moves along the thread of the through hole (2.1) and presses the rod (6.1), as a result of which the force of the piston (6) applied to the pressure element (5) is fixed. Further, by short-term switching on of the main drive unit (16), the conveyor shaft (14) gradually eliminates slack in the traction chain by tightening it.

Due to the fact that the final drive (not shown in the figure) is turned off, and the tension is carried out only by short-term inclusions of the main drive unit (16), and the traction chain scraper is stopped by stops (not shown in the figure), which are installed in the holes (15.1) bottom of the working branch of the conveyor at some distance from the conveyor shaft (14) (not shown in the figure), in the idle branch there is a significant tension in the traction chain under the action of torque (M) of the conveyor shaft (14) (Fig. 1). To continue the work related to tightening, shortening and connection of the traction chain, complete fixation of the shaft (3) is performed by increasing the pressure in the pressure chamber (8) with subsequent fixation of the piston (6).

Combined friction clutch in the package of friction disks (17) and fixation of the piston force (b) provides sufficient resistance to the rollback of inertial masses, which occurs under the tension of the traction chain, in the direction opposite to the tension of the traction chain in the idle branch.

After carrying out work on the tension of the traction chain (its tightening, shortening and connection), it is necessary to distribute the effort of the traction chain in the working and idle branches of the conveyor. To do this, switch the reversible hand pump (10.1) to pumping mode, then, by rotating the lever element (7.2), the axis (7.1) of the retainer (7) is unscrewed, while the elastic element (4) is compressed and moves the pressure element (5), as a result of which the working fluid is displaced by the piston (b) from the pressure chamber (8) into the container (10.2).

Due to the gradual decrease in pressure in the pressure chamber (8), the friction clutch in the pack of friction discs (17) decreases and the shaft (3) is smoothly debraked, and accordingly

From the conveyor shaft (14), which allows you to distribute the force of the traction chain in the working and idle branches of the conveyor.

The use of the proposed device allows you to place it in the form of a removable block opposite the main drive unit (16) outside the conveyor frame (15) and thereby reduce the size and weight of the main drive unit (16), which significantly reduces the load under which it is possible to tilt the frame of the drive section at weak soils and especially when moving the conveyor.

The possibility of manual control of the reversible manual pump (10.1) and the latch (7) of the piston (6) allows to simplify the design and ensure the autonomy of the drive of the tensioning device, while the reverse pump ensures multiple reuse of the working fluid.

Source of information: 1. Patent of Ukraine for utility model Mo 79661, publ. 25.04.2013, Bull. Mo 8.

Claims (3)

USEFUL MODEL FORMULA 1. A device for tensioning a chain of a mine scraper conveyor, which contains a body (1), in which a friction mechanism (17) is placed, which interacts with a pressure element (5), a shaft (3) with an elastic element (4), a cover (2) , a pressure element drive, which is characterized by the fact that the friction mechanism (17) is made in the form of a pack of friction disks installed with the possibility of axial movement, the elastic element (4) is kinematically connected to the shaft (3) and the pressure element (5), the drive of the pressure element includes a piston (b) installed in the cover (2) that interacts with the pressure element (5), a retainer (7) of the piston (6) installed in the cover (2) with the possibility of axial movement, a pressure chamber made in the cover (2) (8), which is limited by the surfaces of the piston (6) and its rod (6.1) and is hydraulically connected to the pressure unit (10) through the channel (9) made in the cover (2). 2. The device according to claim 1, which is characterized by the fact that the pressure unit (10) is made in the form of a reversible hand pump (10.1), hydraulically connected to the container (10.2). 3. The device according to claim 1, which differs in that the latch (7) of the piston (b) is made in the form of an axis (71) with a lever element (7.2), which is connected to the cover (2) by a threaded connection. ; and "PISHNYKH KE HOOVE VV "vek E Vnnnnnnia that OO Y c. an E I sha zh: pan p NN v I AK Po OK 0. KAN ov VO oh 0 SHY s E a: Esh v M V M OEdobieovee u i 4 Do -: V OO NI SYA p A V her s y her higher NI her 0 Her ge A m V OO A V DK what od she 000 and tea | S y chi sh SshK PK Ka OD te p V ve. их х ИЗ ки я мы а и лу Ж ol EN І I pu wah oz / y / Me I y sy y zhov Z PIY Kr; oh horn