A hydraulic system of a large gate shearing machine

Abstract

A hydraulic system of a large-scale gate type plate shearing machine comprises an oil cylinder connected with a tool holder, an oil tank, a hydraulic power part and a hydraulic control valve, wherein the oil cylinder comprises a main oil cylinder and an auxiliary oil cylinder, and the rod chamber of the main oil cylinder is connected with the non-rod chamber of the auxiliary oil cylinder to realize series connection of the two oil cylinders for synchronously driving the tool holder to move up and down. The hydraulic system further comprises two balance oil cylinders which are connected with the end parts of the tool holder, used for supporting the tool holder, and provided with oil mouths connected with an energy accumulator to form a closed space; the closed space is filled with hydraulic oil which has a certain pressure and used for balancing the tool holder gravity. The hydraulic system is suitable for the large-scale gate type plate shearing machine, is ensured to have enough shearing force during the shearing process with the main and the auxiliary oil cylinders which can be used simultaneously or independently, and can effectively reduce the energy consumption through flexibly selecting the powering ways. Moreover, the energy accumulator is safe to operate and maintain due to the safety loop of the energy accumulator.

Description

technical field [0001] The invention relates to the technical field of hydraulic machines, in particular to a hydraulic system of a large gate type shearing machine. Background technique [0002] The shearing machine is divided into mechanical shearing machine and hydraulic shearing machine. The thickness of the steel plate that the mechanical shearing machine can cut is generally less than 10mm, while the hydraulic shearing machine is mostly used to cut the steel plate above 6mm. Hydraulic shearing machine is divided into pendulum shearing machine and gate shearing machine. Compared with pendulum shearing machine, gate shearing machine has high cutting precision, adjustable shearing angle and long service life of cutting edge. long advantage. In order to meet the special needs of metal sheet shearing machine tools in industries such as steel structures, vehicles, construction machinery, and ships, the specifications of hydraulic gate shearing machines are also getting larg...

AI Technical Summary

Problems solved by technology

The advantage of this system design is that the accumulator, as the auxiliary power source of the hydraulic control system, supplies a certain pressure oil to the hydraulic control system in a short period of time. When the hydraulic system fails, it can still ensure the safe operation of the oil cylinder of the hydraulic control system. The safety of the system, but when shearing, in addition to overcoming the workload, the power unit also needs to store the energy of the return stroke of the tool post in the accumulator, which is only suitable for small shears

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