Hydraulic system energy accumulator station and nitrogen filling method using same

Abstract

The invention discloses a hydraulic system energy accumulator station and a nitrogen filling method using the same. When pressure of the hydraulic system rises, oil liquid enters the energy accumulator, the nitrogen is compressed to be stored in to a nitrogen storage tank; and when the pressure of the hydraulic system declines, the nitrogen enters a piston type energy accumulator from a nitrogen storage tank, the oil liquid is pressed into a loop to release energy. The piston type energy accumulator has a high capacity, sensitive response, small inertia in movement part, long service life, light weight, easy installation, simple structure and convenient maintenance; the piston type energy accumulator is used as a gas pressurization cylinder to fill the nitrogen storage tank with the nitrogen; energy transfer is achieved between incompatible liquid and gas; and the piston type energy accumulator can be used as emergency power source and has functions of leakage supplementary, constant pressure keeping, hydraulic shock absorbing, pulsation absorbing and noise reducing. No additional nitrogen filling device is required; the nitrogen is stable, so that hazards fire, explosion and otherrisks are avoided; and safety and reliability are achieved and efficiency of the hydraulic system id improved.

Description

technical field [0001] The invention belongs to the field of blast furnace hydraulic systems, and in particular relates to an accumulator station of the hydraulic system and a method for filling nitrogen gas by using the accumulator station. Background technique [0002] As we all know: in the blast furnace hydraulic system, many actuators need to supply a large amount of oil in a short time when they are moving. At this time, a large flow and high-power hydraulic pump is required to match it, and a high-power electric motor is also required to increase the volume of the oil tank. Increase the hydraulic station space, resulting in increased production costs. [0003] In addition, if the high-power hydraulic pump continues to work close to the rated output pressure for a long time, it will be easily damaged. The selection of the oil pump also determines the stability of the hydraulic system. [0004] In addition, the large-flow hydraulic pump has a complex structure, high re...

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Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide an accumulator station of a hydraulic system and a method for charging nitrogen gas by using the accumulator station, so as to solve the problem in the prior art that a large amount of oil needs to be supplied in a short time when the hydraulic system actuator moves, Leakage and the energy required to maintain constant pressure, hydraulic shock, pulsation, and noise; and, the piston accumulator itself can be used as a gas booster cylinder to fill the gas storage tank with nitrogen

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