SU394587A1 - HYDRAULIC CONTROL SYSTEM OF THE WORKING BODY OF THE LOADING MACHINE - Google Patents

Description

one

This invention relates to mining equipment.

The hydraulic control systems of the working body of the loading machine are known, including a pump, a hydraulic cylinder, a distributor with a plunger and a single-acting hydraulic lock.

To increase the efficiency of the proposed system, the hydraulic lock is equipped with a control, a cylinder, a pipeline connected to a hydraulic accumulator through a spool, and a valve connected to the distributor plunger.

FIG. 1 The location of the hydraulic system on the loading machine is shown; FIG. 2 shows the scheme of the proposed hydraulic control system.

The hydraulic system includes a pump /, check valve 2, hydraulic accumulator 3, spool 4, control cylinder 5, hydraulic cylinder 6, the hydraulic lock 7 of one-way action, four-POSITIONAL distributor 8, control valve of hydraulic cylinder 6, safety valve 9 and JO oil tank are built in the piston main line. .

The hydraulic system works as follows.

In the neutral position of the distributor 8, the oil from the pump / passes through the distributor 8 and is discharged into the tank 10. The piston of the hydraulic cylinder 6 is driven by the installation of the distributor 8 in the right intermediate or left neutral position. If the valve 8 is installed in the left position, the oil from the pump / pipelines

enter through the distributor 8 in the rod cavity of the hydraulic cylinder 6, which is connected to the left cavity of the hydraulic lock 7.

Under the pressure of the oil, the plunger // hydraulic lock 7 will depress the check valve 12 from

his seat, allowing the oil to pass from the piston cavity of the hydraulic cylinder 6 through the valve 8 to the drain in the tank. The piston of the hydraulic cylinder 6 is moved to the right, while the working body of the loading machine begins to descend.

If the distributor 5 is installed in the right intermediate position from the neutral position, the oil from the pump / will flow through the distributor 5, check valve 12 of the lock lock 7 into the piston cavity of the hydraulic cylinder 6. From the rod end of the cylinder, the oil, the lock of the lock 7, will flow into the tank . Hydrocyldon 5 Piston

will begin to move to the left, the three working parts of the loader are raised.

When installing the distributor 6 to the extreme right position, the plunger 13 of the distributor includes a spool 4, which connects the battery 3 to the piston cavity of the cylinder 5.

The piston of the cylinder 5 under pressure from the oil of the accumulator tank moves to the right and, through the plunger 11, pushes the return valve 12 from its neck. Both cavities of the hydrocylander 6 and the pump / are connected through the distributor 8 with the slip. In this case, the working body of the loading maintine can move freely under the action of external eil, and the pump will be unloaded, due to which the power loss is reduced and the efficiency of the hydraulic system increases.

When the distributor 8 is installed in neutral, the spool 4 under the action of the spring 15 returns to the initial position and separates the piston cavity of the cylinder 5 with the battery, simultaneously connecting it with a drain. The piston 14 of the cylinder 5 returns under the action of the spring 16 to its original position.

The battery is charged through the check valve 2 during the operation of the pump / under load. The safety valve 9 serves to protect the pump 1 from overload.

P) c dme tn 3 o brete n- and

The hydraulic control system of the working body of the loading machine, including a pasos, a hydraulic cylinder, a valve with a plunger, and a one-way hydraulic lock, is characterized in that the plunger distributor.

at

(pus 2