An oil injection device for an ultra-high pressure vessel

Abstract

The invention discloses an oil injection device of an ultrahigh pressure container. The oil injection device comprises an outer cylinder and a piston rod, the piston rod is arranged in the outer cylinder, a first round hole, a second round hole and a third round hole are formed in the outer cylinder, wherein the diameter of the first round hole, the diameter of the second round hole and the diameter of the third round hole are decreased in sequence, the piston rod comprises a first round shaft, a second round shaft and a third round shaft, wherein the diameter and the outer diameter of the first round shaft, the diameter and the outer diameter of the second round shaft and the diameter and the outer diameter of the third round shaft are decreased in sequence, the outer circle of the firstround shaft is matched with the first round hole, the outer circle of the third round shaft is matched with the third round hole, an oil storage cavity is formed between the outer circle of the secondround shaft and the second round hole, a first oil inlet hole is formed in the front end face of the third round shaft, a second oil inlet hole is formed in the radial direction of the third round shaft, the second oil inlet hole communicates with the first oil inlet hole, a first sealing device and a second sealing device sleeve the second round shaft and the third round shaft respectively, andthe two sealing devices are positioned through a step surface between the first round shaft and the second round shaft and a step surface between the second round shaft and the third round shaft correspondingly. The defect that stress concentration is generated at an oil hole due to the fact that an oil hole oil injection mode is adopted is overcome.

Description

technical field [0001] The invention belongs to the technical field of ultra-high pressure vessels, in particular to an oil filling device for ultra-high pressure vessels. Background technique [0002] The liquid pressure in the ultra-high pressure container is generally above 100 MPa, and some even reach several thousand MPa. The oil injection technology is the key technology to ensure the ultra-high pressure of the liquid in the container. At present, there are two main methods of oil injection into ultra-high pressure vessels: one is to directly open oil holes on the connecting parts of the vessel or the wall of the vessel, and then inject the oil through a hydraulic pump, for example, literature: Wu Bing. Magnesium Alloy Research on the design of pipe thermostatic liquid extrusion device (D). Nanjing: Nanjing University of Science and Technology, the oil filling method adopted for ultra-high pressure vessels, the medium liquid in the container is passed through a connect...

AI Technical Summary

Problems solved by technology

When these two oil filling methods are in operation, the oil injection hole is in direct contact with the ultra-high pressure inside the container, so stress concentration easily occurs at the oil hole, which leads to material yield and damage of the container, which spreads to other parts of the container, resulting in Total failure of the container

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