Hydraulic driving system of big arm of heavy railway wagon

Abstract

The invention discloses a hydraulic driving system of a big arm of a heavy railway wagon. According to the technical scheme, the hydraulic driving system includes a hydraulic pump station, a driving cylinder loop, a balance cylinder loop and a balance cylinder oil make-up loop. The hydraulic pump station is connected with the driving cylinder loop and the balance cylinder loop through hydraulic pipes, and the balance cylinder oil make-up loop is connected with the balance cylinder loop through hydraulic pipes. The driving cylinder loop controls the operation of a driving cylinder (20) by a three-position four-way magnetic exchange valve (9), and the pressure of the driving cylinder loop is controlled by a first overflow valve (14) and a second overflow valve (15). The balance cylinder loopcontrols the operation of a balance cylinder (21) by a two-position four-way magnetic exchange valve (32), and the pressure of the balance cylinder loop is controlled by an electromagnetic pressure reducing valve (34). An accumulator (24) of the balance cylinder oil make-up loop is connected with the balance cylinder (21) through a two-position three-way hand-operated direction valve (33). The hydraulic driving system of the big arm of the heavy railway wagon is stable in operation, low in energy consumption and high in safety performance, and hydraulic system faults are easy to troubleshoot.

Description

technical field [0001] The invention belongs to the technical field of the hydraulic system of a readjustment machine. In particular, it relates to a hydraulic drive system for a large arm of a readjustment machine. Background technique [0002] The readjustment machine, as the supporting equipment for the unloading operation of the dumper, can pull the entire train with full load to the designated position to cooperate with the dumper to overturn. However, the current boom hydraulic drive system of the readjustment machine mainly uses three coupled vane pumps or two coupled vane pumps to supply oil to different circuits, and the hydraulic system consumes a lot of energy; its control components choose a single independent plate type or tube type Connecting the valve parts makes the management of the valve parts of the hydraulic system complicated and scattered, which is inconvenient for installation, debugging and fault analysis and troubleshooting; and the boom of the read...

AI Technical Summary

Problems solved by technology

However, the current boom hydraulic drive system of the readjustment machine mainly uses three coupled vane pumps or two coupled vane pumps to supply oil to different circuits, and the hydraulic system consumes a lot of energy; the control components choose a single independent plate or tube type The connection of the valve parts makes the management of the valve parts of the hydraulic system complicated and fragmented, which is inconvenient for installation and debugging and fault analysis and troubleshooting; and the boom of the readjustment machine will fail to rise or fall at a certain position during the lifting process. Unavoidable accidents, low safety

[0003] In short, there are problems such as high energy consumption, easy jamming of the boom, low safety factor, and difficult troubleshooting in the driving process of the boom of the existing readjustment machine.

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