SU1618630A1 - Hydraulic drive for mining machines of impact and vibration action - Google Patents

Abstract

The invention relates to hydraulic drives of mining machines of shock and vibration action. The purpose of the invention is to increase the reliability of operation through the use of a pumping unit as well as a switchgear. Two cavities are made in the walls of the hollow body 2, representing, respectively, two manifolds II and 12 distribution devices. The manifold 12 is connected to the hydro-pneumatic accumulator 13. The plungers 3 and 4 are arranged in pairs and coaxially with each other. Distributive f.

Description

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The invention relates to mechanical engineering, in particular, to chipping hammers and dynamic action planes, and can be used in the mining industry.

The purpose of the invention is to increase

reliability of operation due to the use of a pumping unit as well as a switchgear.

The drawing shows the hydraulic drive of mining machines, a schematic diagram.

The hydraulic drive of the percussion and vibration mining machines includes a pump unit 1 of plunger type, including a hollow body 2 and plungers

3 and 4, which form subpunger cavities 5 with it and are located in pairs coaxially with each other. The pump installation 1 is connected to the output working 6 and reverse 7 cavities of the machine 8 of percussion action through the hydrochannels 90 and 10 by means of a switchgear. The latter includes two collectors: 11 and 12. In the form of two cavities in the walls of the hollow body 2, one of which — collector 12 — is connected to a hydro-nephromatal accumulator 13, having a cavity 14, controlled by a hydraulic lock 15, / connected via a zopotnik 16 to the output the working cavity 6 of the percussion machine 8 and by means of a hydrochannel 9 - with a collector 12, a throttle 17, installed parallel to the hydro-pneumatic accumulator 13 and one of the check valves (18), two locks 19 and 20, designed to connect the output of the work- ing. ; whose 6 and reverse 7 cavities of the machine 8

percussion with drain 21 ,. installed in a hollow body 2 in plane40

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five

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the bones, perpendicular to the axis of the plungers 3 and 4, the eccentric step-shaft of the shaft 22, the number of steps of which is chosen equal to the number of pairs of plungers 3 and 4 for constant contact with the latter in antiphase. In this case, the sub-plunger cavities 5 of single-phase plungers 3 and 4 are connected by hydrochannels to the corresponding collector I or 12. The hydraulic actuator also has non-return valves, besides valve 18., also valves 23-26 and safety valves 27 and 28. The hydraulic actuator receives power from the hydrochannel 29.

The hydraulic actuator works as follows.

 .

Pump installation 1 operates from

electric motor (not shown). Plungers 3 and 4, being in antiphases, control the operation of the machine 8 of percussive action, affecting the exit cavities — working 6 and reverse 7 — when starting from the gold 16. At this, the plunger 3 through the collector: 12, the hydrochannel Y and throttle 17 charges cavity

14 hydro-pneumatic accumulator 13, the latter includes a controlled hydraulic lock

15 to the output working cavity 6, as a result of which the power consumption of the impact of the machine 8 increases significantly; percussion action. Drain from the output of the working cavity 6 occurs through the check valve 18 and the hydraulic lock J9. Overpressure is limited by safety valves 27 and 28v Part of the discharge stream or the entire stream goes to drain through the locks 19 and 20, which provides the necessary thermal mode of operation of the hydraulic drive.

5 1618630.

Claims (1)

The claims are arranged in pairs, aligned with each other. The hydraulic drive of mining machines is shock, and the distribution and vibratory action, comprising as controlled plunger-type pumping unit, hydraulic lock for connection with the outlet-including hollow body and plungers, of the working cavity of the percussion machine sub-plunger actions forming with it and a collector connected bridges, connected by hydrochannels with hydro-pneumatic accumulator, throttles, it and for access to the output of the machine installed parallel to the hydraulics and reverse cavities. pneumoaccumulator and one of the impact actions of distribution valves, and two hydraulic locks device, hydro-pneumatic accumulator, for connecting the output working and check and safety valves, inverse cavities of the drum machine characterized in that, acting with a drain, and establishing, in order to increase the reliability of the jr in the hollow body in the plane, even through the use of the pumping device axis of the plungers, the eccentricity also as a distributor stepped shaft, device, in the walls of the polyoscopes of which is chosen to be equal to the chip-case, two cavities are made, before the pair of plungers for a constant respectively, placing two col-20s with the last contact in the distributor-distributor-vphase pro-detector, and the sub-plunger cavities have one side, one of which is connected with the phasic plungers hydropneumoaccumulator, plugs in the form of an appropriate collector.