Power-off protection loop for static pressure workbench

Abstract

The invention discloses a power-off protection loop for a static pressure workbench. The power-off protection loop comprises an oil absorption filter, a hydraulic pump, a one-way valve, a speed regulating valve and a gear oil distributor that are connected with one another in sequence, wherein the other end of the oil absorption filter is communicated with an oil tank, an energy accumulator filled with static pressure oil with the pressure being higher than the load pressure of the workbench is connected between the one-way valve and the speed regulating valve in parallel, and over-flow valve playing a role of high-pressure protection is connected between the hydraulic pump and the one-way valve. Therefore, according to the power-off protection loop for the static pressure workbench, the power-off protection for the constant-flow static pressure workbench of a heavy type vertical lathe is realized by only the simpler loop, and constant-flow static pressure oil can be continuously supplied for the static pressure workbench.

Description

technical field [0001] The invention relates to a hydraulic circuit, in particular to a power-off protection circuit of a static pressure workbench. Background technique [0002] At present, most of the static pressure guide rails of heavy-duty vertical vehicles use quantitative oil supply. The heavy-duty vertical lathe has a large load and high speed. Due to the inertia effect after power failure, it takes a long time for the workbench to stop rotating. To achieve power-off protection for the constant-current static pressure workbench, it is necessary During the period when the table is not rotating, the hydrostatic oil with load pressure is continuously supplied to the table. Chinese patent CN2476672Y discloses a capacity increasing device for accumulators in hydraulic systems. This patent installs a plug-in two-way pressure reducing valve at the pressure oil port to provide constant pressure hydraulic oil for the system, which can be used in The power-off protection cir...

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Problems solved by technology

Chinese patent CN2476672Y discloses a capacity increasing device for accumulators in hydraulic systems. This patent installs a plug-in two-way pressure reducing valve at the pressure oil port to provide constant pressure hydraulic oil for the system, which can be used in The power-off protection circuit of the constant-pressure static pressure guide rail cannot meet the quantitative oil supply requirements of the constant-current static-pressure workbench of heavy-duty vertical vehicles, nor can it realize the power-off protection of the constant-current static-pressure workbench

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