A low-pressure servo source-controlled ultra-high pressure hydraulic pressure boosting system

Abstract

The invention provides an ultrahigh-pressure hydraulic pressurization system controlled by a low-pressure servo source. The ultrahigh-pressure hydraulic pressurization system comprises an oil tank, an oil pump, a servo motor, one-way valves, three ultrahigh-pressure hydraulic hand-operated valves, an ultrahigh-pressure pressurization cylinder, an electrically-controlled servo valve and a hand-operated overflow valve; the oil tank, the oil pump and the first one-way valve are sequentially communicated, and an oil outlet of the first one-way valve is communicated with a prepressure reset liquid circuit and a pressurization and pressure stabilization unloading liquid circuit; the pressurization system is formed by a low-pressure servo pump, a servo valve and a double-action single-piston-rod pressurization cylinder, a double closed-loop control mode formed by the servo pump and the servo valve acts on the low-pressure side of the ultrahigh-pressure pressurization cylinder, accurate control of low-pressure large flow and ultrahigh-pressure low flow is achieved, pressurization action is not needed by low-pressure pressure increasing, large-flow liquid increasing can be conducted by directly supplying liquid through the servo pump, and ultrahigh-pressure low-flow pressure increasing and pressure maintaining are completed through the servo pump and the pressurization cylinder. According to the ultrahigh-pressure hydraulic pressurization system controlled by the low-pressure servo source, ultrahigh-pressure low-flow pressure increasing, pressure maintaining and pressure decreasing servo control are integrated into a whole, the control accuracy is high, and the time-varying requirement of pressure can be met.

Description

technical field [0001] The invention relates to a hydraulic boosting system, in particular to a low-voltage servo source-controlled ultra-high pressure hydraulic boosting system, which belongs to the technical field of ultra-high pressure boosting equipment. Background technique [0002] Due to the new application of ultra-high pressure technology in various fields such as material forming, petrochemical industry, food processing, earth science research, aerospace, shipbuilding industry, bridge and metallurgy in recent years, ultra-high pressure hydraulic technology has developed rapidly. The high-temperature and high-pressure rheometer is an advanced experimental instrument used to study the phase transition and rheological characteristics of rocks deep in the earth under high temperature and ultra-high pressure conditions. The precise control of the test is the key technology to determine the success or failure of its experimental samples. Among them, the confining pressu...

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