SU1671847A1 - Coal winning machine actuator - Google Patents

Abstract

The invention relates to mining equipment, namely, coal combines (CC). The goal is to increase the reliability of the executive body of the Criminal Code. It includes a screw with incisors and nozzles in jet-forming trunks mounted on a hollow drive shaft / PV / with a water supply coupling. An axis is installed inside the coupling for supplying water and PV, one end of which is kinematically connected with the control drive, and the other is made of a larger diameter with an inclined end surface. A pressure washer is installed on the latter with a groove for interacting with the driver located in the valve block. A pulsation damper is installed in the PV, and the jet-forming nozzles have dampers. When rotating, the PV with the screw rotates and the pressure washer is entrained by the leash. Pushers, overcoming the pressure of water, raise the valves above the saddle, passing water through the channels to the stream-forming stems and then through the dampers to the nozzles. Due to the location of the control drive, coaxially with the PV, the reliability of the device is increased. 1 il.

Description

The invention relates to mining and can be used in coal combines designed for coal mining.

The purpose of the invention is to increase the reliability of the executive body.

The drawing shows the proposed executive body of the coal combine.

In the housing of the gearbox 1 on bearings mounted hollow drive shaft 2 with a clutch 3 water supply. On the drive shaft 2 a screw 4 is mounted and secured with a nut 5. In the screw 4 there are cutters 6 and removable jet-forming trunks 7, in which the nozzles 8 are installed, dampers 9 and filters 10. Inside the screw 4 there is a valve block 11, in the bores of which

sleeves 12 are installed with flaps 13 and pushers 14. Pushers 14 rest on a pressure washer 15 mounted on axis 16, located in the cavity of the drive shaft 2, inclined to the axis of rotation of the auger. The pressure washer 15 rests on the balls 17 and is secured with a retaining ring 18. The leash 19 is fixed in the cover of the valve block 11 and contacts the pressure washer 15 by means of the groove 20. The control actuator 21 is mounted in the water supply sleeve 3 and is fixed to the gear case 1. The drive The control unit 21 consists of a piston rake 22 and a gear 23. fixedly mounted on the axis 16. In the cavity 24 of the drive shaft 2, a pulsation damper 25 is mounted.

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High-pressure water is supplied to the socket 26 of the coupling 3 for supplying water, then it enters the cavity 24 of the drive shaft 2 and through channels 27 into the sleeves 12 in which it presses the valves 13 to the seats and seals the channels 28 for supplying water to the nozzles installed in front of the cutters 6 of the screw four.

The executive body works as follows.

When the drive shaft 2 is rotated with the screw 4, the pressure washer 15 rotates, it is carried away by the leash 19. The distance between the end surface of the pressure washer

15 and the flaps 13 are varied. As a result, the pushers 14, having overcome the water pressure, raise the valves 12 above the saddle, pass water through the channels 28 to the removable jetting trunks 7, filter the flow with filters 10, and then through dampers 9 to the nozzles 8.

Water flows through an arc of a circle corresponding to the zone in which thin jets interact with the face. Therefore, the position of the thrust washer 15 is determined by the location of the zone within which thin high-pressure jets emanate from the nozzles of removable jet-forming barrels 7.

The position of the pressure washer 15 is changed before the combine starts moving in the opposite direction by turning the axis

16 by a control drive 21 at an angle corresponding to the movement of the zone in which thin streams of water interact with the face.

The synchronous opening of one valve with the closing of the other is ensured by their adjustment, which is carried out by making the same sizes of the pushers 14 and screwing in the sleeves 12 up to the stop.

Thus, the proposed actuator allows improving reliability by simplifying the design of the transfer mechanism for rotating the pressure washer and positioning the control drive coaxially with the drive shaft, and also eliminates wear of the contact point of the pressure washer with the pushers. The use of a pulsation damper located in the cavity of the drive shaft improves the reliability of operation of the valves and supply lines.

Installation of nozzles, dampers and filters in removable stream-forming

the trunks allows, in addition to reliability, to promptly replace them during maintenance work.

Claims (1)

Claims The executive body of a coal combine, comprising a hollow drive shaft with a water supply coupling, on which a screw with chisels and nozzles in the jet-forming barrels, a valve block and a control drive are mounted, is kinematically associated with a thrust washer mounted inclined to the axis of rotation of the screw with the possibility of rotation, characterized in that, in order to increase reliability, the control drive is coaxially with the drive shaft, and in the water supply coupling and the drive shaft there is an axis, one end of which is kinematically connected with the control drive, and the other is made of a larger diameter with an inclined face a surface on which a pressure washer is installed, made with a groove for interacting with a driver made in the valve block, wherein the drive shaft is made with a pulsation damper installed in the cavity of the drive shaft, and in front of the nozzles the jet-forming barrels have dampers, Cvl cvj fO Xx Ј to 04 CN Csj