Synchronous control system for hydraulic oil cylinder of hexahedral jacking machine

Abstract

The invention discloses a synchronous control system for a hydraulic oil cylinder of a hexahedral jacking machine. The synchronous control system comprises single-cylinder oil supply pipelines and reciprocating superchargers, which are in one-to-one correspondence to working oil cylinders, wherein ultrahigh-pressure hydraulic-control one-way valves are arranged on the single-cylinder oil supply pipelines; single-cylinder one-way valves are arranged on oil inlets of the single-cylinder oil supply pipelines; high-pressure plunger piston oil discharge holes of the six reciprocating superchargersare connected to outlets of the ultrahigh-pressure one-way valves after being connected in parallel, solenoid valve T ports of the six reciprocating superchargers are connected to the inlets of the ultrahigh-pressure hydraulic-control one-way valves in parallel, and low-pressure piston exhausted oil of the reciprocating superchargers flows out from the solenoid valve T ports of the reciprocating superchargers, and is pressed into the inlets of the ultrahigh-pressure hydraulic-control one-way valves after being accessed in parallel. The synchronous control system can guarantee synchronous displacement control precision of six-cylinder equal-volume oil supply, and enables synchronous control precision to reach 0.1mm-0.2mm; and moreover, the reciprocating superchargers can be taken as an ultrahigh-pressure oil source for loading oil pressure of a working oil cylinder to working pressure being 120 MPa. The synchronous control system can realize precisely controlling six-cylinder synchronous displacement in a liquid filling process and an ultrahigh-pressure process.

Description

technical field [0001] The invention relates to the technical field of hydraulic control, in particular to a synchronous control system for a hydraulic oil cylinder of a six-sided top press. Background technique [0002] The six-sided top press is the main equipment for synthetic diamond synthesis in my country. Its working principle is: six working oil cylinders are opposite to each other on the three coordinate axes of XZY, and high-pressure oil is introduced from six directions to pressurize the center of the host machine. Push the piston forward to generate ultra-high pressure on the front end of the piston. Under the action of the hard alloy anvil in the center of the host machine, the production raw material block forms a sealed cubic ultra-high pressure chamber, which provides high-pressure conditions for synthetic diamond synthesis. During the pressurization process, the position accuracy of the press piston to the movement of the three coordinate centers has a decisi...

AI Technical Summary

Problems solved by technology

At present, there are many traditional six-sided press hydraulic systems such as figure 1 As shown, the electro-hydraulic control system is used to control various components in the hydraulic system, and the speed of the six working cylinders from the throttle valve 23 to the throttle valve 28 is used to adjust the speed of the six working cylinders from the working cylinder 3 to the working cylinder 8. Matching and synchronization accuracy requirements for oil cylinders, the existing problem is that there is no uniform standard for the adjustment process of the six fixed throttle valves, and manual adjustments are all based on experience, and are affected by fluctuations in oil temperature and compression deformation resistance of raw material blocks during work. The repetition accuracy of the synchronous displacement of the six working oil cylinders changes greatly, and the displacement speed of the six cylinders can only be adjusted and controlled during the liquid filling process of the press. In the overpressure section of 10~120MPa, the high pressure oil does not pass through the throttle valve 23 to the throttle. Flow valve 28, unable to adjust synchronous motion

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