SU1402725A1 - Accumulator-pump recuperative hydraulic drive - Google Patents

Abstract

The invention makes it possible to expand the functionality of the hydraulic drive by providing battery operation at certain moments of the cycle. The cavities 2 and 3 of the hydraulic engine 1 communicate with the pressure hydraulic line (CH) 4 of the pump 5 through a four-line three-position distribution

Description

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N5 SP

divider 6. At the outlet of pump 5, a check valve (K) 7 is installed. Power battery 8 is connected to CH 4. After K 7, and to the cavity of the hydraulic motor - through recuperative feedback K 12. In the communication line of the battery 8 with CH 4 a controlled reverse K 11 is installed, open towards the battery 8, and regenerative CH 13 is connected to the last after

K 11. To ensure operation of the hydraulic drive in the low-pressure mode, K 11 is switched to the closed position, and to ensure operation in the battery mode - to the open position. In the braking mode, the fluid from the drain cavity through K 12 through CH 13 is drained into the accumulator 8, min CH 4, which will increase the efficiency of the hydraulic drive, 1 Il.

one

The invention relates to a volumetric hydraulic drive for machines and cycling units.

The aim of the invention is to enhance the functionality of the hydraulic drive by providing battery operation at certain points in the cycle.

The drawing shows the scheme of the proposed hydraulic drive.

The hydraulic actuator contains a hydraulic motor 1, cavities 2 and 3 of which are connected to the pressure hydraulic line 4 of pump 5 through a four-line three-position valve 6, at the outlet to the coca 5 there is a check valve 7, after which the power accumulator 8 is connected to the hydraulic line 4, and the input of the pump 5 connected to the drain hydraulic line 9 and the battery filler 10. In the communication line of the battery 8 with the hydraulic line 4, a controlled check valve 11 is installed, open H towards the battery B, Cavity 2 and 3 of the hydraulic engine 1 communicate with the battery 8 through rekupe ativnost check valves 12 and regenerative hydraulic line 13 connected to the outlet valve 11, cavities 2 and 3 communicated with a drain hydraulic line 9 through the sub pitochnye check valves 14, -a pump 5 - through valve 15 to discharge.

The hydraulic actuator works as follows

To ensure that the hydraulic drive operates in the pumping mode, the controlled check valve 11 is switched to the closed position, and

0 0

five

five

operation in the battery mode - to the open position, In the braking mode (valve 8 is closed, the movement of the hydraulic motor continues by inertia), the fluid from the drain cavity of the hydraulic motor through the recuperative valves 12 is drained through the regenerative hydraulic line 13 into the power accumulator 8, mine pressure hydraulic line 4, which increases the efficiency of the hydraulic drive. At the same time, the pressure chamber of the hydraulic motor is filled with liquid from the filling accumulator 10 through the recuperative valves 14,

Claims (1)

Formula of the invention The accumulator-pump recuperative hydraulic drive containing a hydraulic motor, the cavities of which are in communication with the pressure hydroline, the pump through a four-line three-way distributor, a check valve installed at the pump outlet, the filling and power batteries, while the latter is connected to the pressure hydraulic line after the check valve and to the hydraulic engine cavity through regenerative hydroline and recuperative check valves, characterized in that, in order to extend the functionality, a power valve with a pressure hydraulic line is installed in the communication line of the power accumulator, open to the battery side, and the regenerative hydroline is connected to the latter after the said valve.