Braking device for a shearer

 

(57) Abstract:

The invention relates to restraint systems harvesters working on flat and inclined strata during the extraction of minerals by underground mining. The task of the invention to provide a larger active area, which significantly reduces the pressure of the working fluid required for compression springs, reduces heat, power consumption and wear hydraulics, simplifies the design, manufacture, installation, maintenance and repair. The brake device of the Shearer includes placed in the cavity of the feeder the glass support disc, friction discs mounted on the splines of the Cup and friction discs located in the slots of the intermediate shaft, brake housing, placed in the bore of the Cup, a spring mounted in the holes of the plunger, pressure disc, located between the piston and the friction disks. The plunger side of the pressure disk has a radial projection of a spherical cross-sectional shape, with the back side of the plunger is made deaf nests. Between the bottom of the slots and the housing of the brake springs installed. The plunger is connected with the chassis rails with the possibility of movement of the plunger along the guides. Planitsa to mining, in particular, devices hold harvesters working on flat and inclined strata during the extraction of minerals by underground mining.

Known hydraulic feeder for coal combines, including the electric motor, hydraulic pump, hydraulic motor, gearbox, double star and two chains, fixed by means of shock absorbers, which includes brake clutch, kinematically connected to the shaft double stars, and a device for controlling the clutch, and each shock absorber made in the form of two hydraulic cylinders, rod end which are interconnected. (A. C. USSR N 285864, CL. E 21 C 29/00, 1969).

The known solution is not intended for harvesters with chainless feed system, has a large number of plungers and springs, which complicates the design, and the shock absorbers associated with the circuit, not fully dampen vibration of the latter, therefore, the proposed mechanism has become obsolete and unsafe operation.

Known braking device cleaning coal combine, built-in feeder and comprising a housing, a Cup, friction discs, push and bearing caps and pistons, and the device has a stepped sleeve, one more step is coy and bottom of the piston are pin and spring, interacting with the probe and a stepped sleeve, and a pin through the hole made in the stepped sleeve, stands for the surface of the pressure cover. (A. C. USSR N 1247534, CL. E 21 C 29/20, 1985 ).

In this solution also, as in the previous, in the cylindrical bore of the glass enters the housing in the cavity which uniformly around the circumference of the inserted eight pistons with springs preloaded pressure cap, which complicates the design of the device and reduces its reliability.

In addition, the known device has a significant idle power consumption. In view of the fact that the active area of the piston is small and for compressing the spring when releasing require significant working fluid pressure (40 MPa), it passes through the relief valve to bleed pressure, heated and re-circulated in the system, causing additional energy consumption, wear hydraulics and fluid flow. In addition, all pistons require maintenance and have approximately the same power characteristics, in order to avoid undesirable distortion of the housing cups.

Closest to the proposed to the technical essence and the achieved result awlays feeding mechanism of the glass support disc friction discs installed in the slots of the Cup and friction discs located in the slots of the intermediate shaft, brake housing, placed in the bore of the Cup, a spring mounted in the holes of the plunger, pressure disc, located between the piston and the friction disks. (RF patent N 1828495, CL. E 21 C 35/20, 29/30, 1990) is adopted for the prototype.

In the known solution, as well as in the analogue, in the case of brakes made eight holes, into which are inserted pistons with springs preloaded pressure cap. For release of the harvester and the decoder friction discs require a constant supply pressure of the working fluid under the piston, which compresses the springs and friction discs have the opportunity to rotate together with the intermediate shaft, a toothed wheel and drive wheel transmits rotation to zamochnoe wheel, siteplease with rake harvester moves along the face. When the supply of fluid under pressure, the latter passing through the valve, heated, causes additional energy consumption, wear hydraulics and fluid flow. Manufacture, service, repair and installation of a braking device of the prototype is also costly and ity of the invention is that the brake device of the Shearer includes placed in the cavity of the feeder the glass support disc, friction discs mounted on the splines of the Cup and friction discs located in the slots of the intermediate shaft, brake housing, placed in the bore of the Cup, a spring mounted in the holes of the plunger, pressure disc, located between the piston and the friction disks, characterized in that the plunger side of the pressure disk has a radial projection of a spherical cross-sectional shape, with the back side of the plunger is made deaf nests, between the bottom of the slots and the housing of the brake springs installed, as the plunger is connected with chassis rails, with the possibility of movement of the plunger along the guides, and the plunger is equipped with a ring located in the bore between the plunger and the glass.

The causal link between the claimed combination of features and achievable technical result is the following.

A sign - "the plunger side of the pressure disk has a radial projection of a spherical cross-sectional shape ensures optimum interaction of the plunger with pressure disk, even the last touch on the minimum area which should be placed in the plunger spring providing interaction of the piston with the brake housing and the health of the latter, provided that exceptions to the design of pigs present in the prototype.

Sign - "between the bottom of the nests and the brake housing the springs ensures the operability of the brake device is pressed against the friction discs to each other, that is, braking choppers and their subsequent opening, in which the friction disks are rotatable together with the intermediate shaft and to move the harvester along the face.

Sign - "and the plunger is connected with chassis rails, with the possibility of movement of the plunger along the guide does not allow the plunger to rotate relative to the housing, as this will cause damage to the springs, but at the same time allows the movement of the plunger along the rails, providing a braking device.

Sign - "and the plunger is equipped with a ring located in the bore between the plunger and the glass provides reliability and allows to obtain a large area, which significantly reduces the pressure of the working fluid (1.2 MPa), when submitting it for compressing the spring during movement of the combine, reduce heat, energy consumption is. 2 - section a-a of Fig. 1, in Fig. 3 - the node B of Fig. 2.

The brake device 1 of the Shearer 2 is built into the feed mechanism 3 and includes a rigidly mounted in the cavity of the feeder Cup 4 to the support plate 5, upon which the friction disks 6 cups installed in the slots of the Cup, and in between the friction disks 7 of the shaft, placed in the slots of the intermediate shaft 8. In the cylindrical bore of the Cup 4 includes a housing 9 of the brake, rigidly connected with the housing of the feed mechanism 3 of the combine harvester 2. In the bore of the casing brake 9 with rigidly mounted in the housing of the brake rails 10, a piston 11 with the possibility of movement of the plunger along the guides. The plunger 11 from the side of the pressure disc 12 has a radial protrusion 13 a spherical cross-sectional shape, which is constantly in contact with pressure disk 5. On the reverse side of the plunger 11 is made blind slot 14, evenly spaced around the circumference of the plunger. Between the bottom of the blind slots 14 and the brake housing 9 of the springs 15. The plunger 11 to the outer surface of the radial lip 13 is provided with a ring 16, which is located in the bore between the plunger and the glass 4. In one of the blind slots 14 is installed by passing the m return spring 19. Moreover, the rod 18 is made of such length that when the invalid operating conditions the wear of the friction discs 6 and 7 rod with its calibration is not performed from the bushing 17. The feed mechanism 3 includes an intermediate shaft 8 and the associated gear wheels 20, 21, 22, 23, the output shaft 24, the drive wheel 25 and zamochnoe wheel 26 that is part of the engagement with the rack 27 mounted on the face conveyor 28.

The brake device of the Shearer is as follows.

When the flow of the operating fluid in the cavity "a" between the housing 9 and brake ring 16, the plunger 11 moves to the left along the guide rails 10, (Fig. 3), compressing the spring 15. Thus the coupling between the friction discs 6 and 7 is terminated and the friction disks 7 of the intermediate shaft 8 have the opportunity to rotate together with it. During the rotation of the intermediate shaft 8 torque through gears 20, 21, 22, 23, the output shaft 24, the drive wheel 25 is transmitted to zamochnoe wheel 26, which siteplease with the rail 27, moves Shearer 2 along the face on the conveyor belt 28.

At the time of braking, the cavity "a" between the housing 9 and brake ring 16 is connected with a drain hydraulic line (not shown). Under deliverest press in the same direction, the pressure disc 12, which is moving, presses the friction disks 7 of the intermediate shaft 8 of the friction discs 6 cups 4, causing inhibition and subsequent stopping of the intermediate shaft. In this case zamochnoe wheel 26 via rail 27, mounted on the conveyor 28 holds Shearer 2 against inadvertent downward movement on inclined seams.

During operation of the brake device 1 friction discs 6 and 7 are worn and their thickness decreases and hence the graduated rod 18 under the action of the return spring 19 will move to the right (Fig. 3) in the sleeve 17 on the amount of wear. The length of the rod is designed in such a way that reducing the number of scratches on the outside of the rod 18 of the sleeve 17, indicates the degree of wear of the friction discs 6 and 7, and in full standing of the rod in the sleeve, the work of the Shearer 2 should be stopped and the brake device 1 is to be repaired.

The execution of a braking device of the Shearer with the plunger, provided with a ring located in the bore between the plunger and the glass allows you to get a large active area, which significantly reduces the pressure of the working fluid required for compressing the springs, it reduces heat flow enabledelete braking device can be used on combines with any travel drive.

The brake device of the Shearer comprising placed in the cavity of the feeder the glass support disc, friction discs mounted on the splines of the glass, and friction discs located in the slots of the intermediate shaft, brake housing, placed in the bore of the Cup, a spring mounted in the holes of the plunger, pressure disc, located between the piston and the friction disks, wherein the plunger side of the pressure disk has a radial projection of a spherical cross-sectional shape, with the back side of the plunger is made deaf nests, between the bottom of the slots and the housing of the brake springs installed, as the plunger is connected with chassis rails, with the possibility of movement of the plunger along the guides, and the plunger is equipped with a ring located in the bore between the plunger and the glass.

 

Same patents:

FIELD: machine building; mining.

SUBSTANCE: invention relates to development of a long face and more specifically to chain cable layer in equipment for development of long face, specifically to a device with chain links, a cable chain assembly and mining apparatus. Device with chain links for a cable chain assembly comprises a chain link having walls cooperating to define a compartment opening in direction of axis, fibre optic cable being configured to be supported in said compartment, communications configured to be supported in said compartment; and a flexible member supported in said compartment and configured to engage with fibre optic cable, flexible member positioning fibre optic cable toward one of said walls. Cable chain assembly for mining machine comprises chain links, each of which has upper wall, lower wall, first side wall and second side wall together defining a compartment, open in direction of said axis. Fibre-optic cable passing through compartment in each of chain links and passing substantially in wavy path. First flexible member supported in compartment of one of chain links configured to interact with fibre-optic cable and positioning a fibre-optic cable in upper wall of said one of chain links. Second flexible member supported in compartment of second chain link, configured to interact with fibre-optic cable and positioning a fibre-optic cable in lower wall of second chain link.

EFFECT: prevention of excessive tension and cable damage due to provision of sufficient specified cable sag.

54 cl, 9 dwg

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