SU1219753A1 - Drive of bucket chainof dredger - Google Patents

Description

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The invention relates to ladle dredgers and dragons, namely to drives for scooping chains of multi-slurry dredgers.

The purpose of the invention is to increase reliability by reducing dynamic loads.

FIG. 1 shows a diagram of the proposed drive; in fig. 2 - copies of the oscillo Grams of current and voltage of the electric motor of the upper scoop drum.

The scoop drive proposed includes an electric motor 1, on the shaft of which a hydraulic pump 2 is mounted for sampling and summing up power, and a hydraulic accumulator 3 connected to each other by means of a spool 4 and pipelines 5-8. A non-return valve 9 is installed on the pipe 5. A pipeline overflow valve 11 is connected to the pipe 10 connected to the pipe 5 and connected to the accumulator 12 by the pipe 12. The working fluid is drained into the tank 13. The coil of the electromagnet 14 of the spool 4 is powered by an electromagnetic relay 15, the control winding 16 of which is turned on for the voltage drop in the depy of the electric motor 1, and the reference winding 17 is connected to the independent power source with a potentiometer 18.

The device works as follows.

Proceeding from the technological mode, the average current value is taken as 1o and the current is regulated by a potentiometer 18. Starting from point B, the setpoint current will be higher than the current in the control winding 16 and the hydraulic pump 2 will operate as a pump, heating the liquid from the tank 13 to the accumulator 3 through pipelines 7, 6 and 5 through the non-return valve 9 and the spool 4 from pressure P. to P,

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When the maximum permissible pressure P is reached, the overflow spool 11 opens and the working fluid is discharged through the pipeline 10 to the tank 13, and the hydraulic pump 2 switches to idle mode.

From point B to point D (the scoop emerged from the ground) the hydraulic pump 2 draws energy from the electric motor. The resistance moment generated by the hydraulic pump is determined by

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pressure in Idroakkumul Tory ;, and the pump flow - the frequency of rotation of the electric motor.

At point D, the scoop cuts into the ground.

and the current in the driver winding G / becomes less than the current in the control winding 16, while the spool 4 is moved by the electromagnet 14 to a position corresponding to the operation of the hydraulic

pump 2 in motor mode. At the same time, the hydraulic pump operates in parallel with the electric motor 1 due to the energy of the working fluid supplied from the hydroaccumulator 3 via pipelines 8 and 6 further through pipelines 5 and 7 through the non-return valve 9 to the tank 13, together with the electric motor previously selected energy and helping it to overcome cutting resistance scoop. In this case, the additional torque generated by the hydraulic pump-motor is determined by the pressure change in the hydraulic accumulator 3 from P to.

Switching the operating modes of the hydraulic pump 2 is performed by the spool 4 automatically depending on the load on the drive and the current in the driver winding 17 according to the signal

electromagnetic relay 15 ,. The direction of movement of the spool 4 is determined by the mismatch polarity between the control signal of the winding 16 and the driver signal 17. In this case, the current of the control signal in the winding 16 is proportional to the current in the motor core, and the current in the driver winding 17 corresponds to the average load on the drive at

given technological mode scoop soil.

The use of the proposed device will reduce current fluctuations and peak power values, which

noticeably stabilizes the load and reduces the dynamic forces and vibration of the scoop tower.

Such a decrease in the dynamic load on the FH will reduce the voltage fluctuations and the frequency of the current in the general ship network.

and improve the performance of systems powered by DH. In addition, the use of the proposed device will allow the diesel generator set of the ship power plant to operate with higher values and with lower specific fuel consumption.

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Editor A. Kozoriz

fopofmepucfnu / ia naipi / jnu with iNestinZon.

feature / pi n ttat / i / 3 / u with prefax tafnim j / cmpoiemSfH

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Compiled by L.Vinogradov Tehred I.Ve -Recorrector T. Kolb.

Order 1301/41 Circulation 641 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, Proektna St., 4

Recording time t, c

Claims (1)

DRIVE OF A SCREW CHAMBER CHAIN, containing an electric motor connected to the working shaft of the drum of the scoop chain, characterized in that, in order to increase reliability by reducing dynamic loads, it is equipped with a hydraulic pump, a tank, a check valve. an overflow spool, a hydraulic accumulator, a spool with an electromagnet, an electromagnetic relay with a control and master winding, a potentiometer and a shunt connected to the motor armature circuit, and a master coil of the electromagnetic relay is connected in series with a potentiometer, the control winding is connected to the shunt, and the contacts are connected to the coil of the spool solenoid the first inlet of which is hydraulically connected through a check valve to the outlet of the hydraulic pump, to the inlet of which the second outlet lottery,. the first output of which through the hydraulic accumulator 18 is hydraulically connected to the first input of the overflow spool, the second input of which is hydraulically connected to the output of the hydraulic pump, and the output of the overflow spool and the second input of the spool are connected to the tank. SU „1219753 1 12