Hydraulic control system and method for lifting hydraulic cylinder of stepping mechanism

Abstract

The invention relates to the technical field of metallurgy and forging equipment, in particular to a stepping mechanism lifting hydraulic cylinder hydraulic control system and method.The stepping mechanism lifting hydraulic cylinder hydraulic control system comprises an energy accumulator set, a volume speed regulating pump set unit, a valve control unit, a reversing valve unit, a backpressure oil supplementing unit and a hydraulic oil tank; one oil port of the volume speed regulation pump set unit is connected with the energy accumulator set, the other oil port of the volume speed regulation pump set unit is connected with a rodless cavity of the lifting hydraulic cylinder through the valve control unit, and the valve control unit can control opening and closing of an oil way between the volume speed regulation pump set unit and the rodless cavity of the lifting hydraulic cylinder. An oil inlet of the reversing valve unit is connected with the energy accumulator set, an oil outlet of the reversing valve unit is connected with a rod cavity of the lifting hydraulic cylinder, and an oil return opening of the reversing valve unit is connected with the backpressure oil supplementing unit. The gravitational potential energy of an object lifted by the lifting hydraulic cylinder can be utilized, the energy utilization efficiency of a hydraulic control system of the lifting hydraulic cylinder is improved, and energy and energy waste are reduced.

Description

technical field [0001] The invention relates to the technical fields of metallurgy and forging equipment, in particular to a hydraulic control system and method for a lifting hydraulic cylinder of a stepping mechanism. Background technique [0002] The stepping mechanism is widely found in mechanical equipment such as stepping heating furnaces, stepping cooling beds, and stepping transport chains. continuous motion mechanism. [0003] Walking furnaces are widely used in the manufacture of major complete sets of equipment such as metallurgy and mining machinery, especially for the pre-forging heating of some advanced steel forgings or the pre-rolling heating of hot rolled products. The stepping mechanism of the stepping heating furnace is generally driven and controlled by a plurality of hydraulic cylinders. These hydraulic cylinders are mainly used to stepwise lift and transport heavy objects such as billets, so as to realize the process control requirements of the stepping...

AI Technical Summary

Problems solved by technology

However, the control of the lifting hydraulic cylinder of the existing furnace bottom machinery is based on the control principle of valve-controlled throttling debugging, which has a large throttling loss

Some other energy-saving technologies use accumulators for energy recovery, all of which use single-chamber control technology, without considering issues such as oil replenishment in rod chambers, resulting in problems such as excessive volume of accumulators, increased costs and failure rates.

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