Self-buffering-type gas-liquid mixing multi-stage ejection mechanism

Abstract

The invention discloses a self-buffering-type gas-liquid mixing multi-stage ejection mechanism. Gas is taken as a power source; oil fluid is taken as a pressure transmission medium; the gas-liquid mixing multi-stage ejection mechanism is formed by combining a mode of mutual sliding friction match of multiple stages of piston cylinders; relative moving speed of stages of moving parts of the ejection mechanism is reduced; the sealing difficulty during high-speed ejection is effectively reduced, and high-speed ejection is realized in a limited moving journey; a throttling buffer structure, oil fluid buffering and an unloading groove are combined, so that a self-buffering function of the multi-stage ejection mechanism is realized; and an oil charging opening is formed so that oil charging and oil exchanging maintenance is facilitated. The self-buffering-type gas-liquid mixing multi-stage ejection mechanism can be applied to fields of military and civil ejection such as shipboard aircraft, missiles, unmanned planes and ejection experiment devices; the sealing performance is reliable; ejection capable of realizing a self-buffering function can be provided under a condition of limited assembly space; the efficiency is high; and the controllability is good.

Description

Technical field [0001] The invention belongs to the technical field of ejection devices, in particular to a self-buffering gas-liquid mixed multi-stage ejection mechanism. Background technique [0002] At present, the main ejection methods used are gun type, gas type, steam type, compressed air type, hydraulic type, hydropneumatic type, electromagnetic type, etc. [0003] Among them, the cannon-type ejection mechanism has large impact overload and is uncontrollable, and the gas-type ejection mechanism has high temperature ablation; the steam-type ejection mechanism (ie, the open cylinder) requires a large amount of steam, poor sealing effect, low energy utilization, and ejection Long acceleration distance; compressed air ejection method, the ejection performance depends on the pressure and volume of the cylinder, and there are also problems that it is difficult to ensure the sealing performance; hydraulic ejection mechanism, high ejection speed, fast response, but for heavy ejectio...

AI Technical Summary

Problems solved by technology

[0003] Among them, the cannon-type ejection mechanism has a large impact overload and is uncontrollable, and the gas-fired ejection mechanism has high-temperature ablation phenomenon; the steam-type ejection mechanism (that is, the open cylinder) requires a large amount of steam consumption, poor sealing effect, low energy utilization rate, and ejection The acceleration distance is long; the compressed air ejection method depends on the pressure and volume of the gas cylinder, and there is also the problem that it is difficult to ensure the sealing performance; the hydraulic ejection mechanism has a high ejection speed and fast response, but it is suitable for ejecting heavy duty at an ultra-high ejection speed. When the load is loaded, it is necessary to design a hydraulic control valve with a large flow rate and high-speed response, and the existing sealing technology is difficult to ensure a reliable seal between the sleeves in the ejection mechanism; the advanced electromagnetic ejection method is not affected by the ejection load, ejection distance, The ejection speed is limited, and the controllability is strong, but there is strong magnetic field interference, and the energy consumption is huge, and the energy device required is huge, and it is only suitable for large nuclear-powered aircraft carriers.

[0004] In addition, the gas-liquid hybrid power ejection device proposed in patent 201010524849.0 uses gas as the power source and oil as the pressure transmission medium. It has good ejection performance and effectively combines the advantages of pneumatic ejection and hydraulic ejection. However, as a single-stage cylinder, It is impossible to overcome the high-speed sealing problem when ejecting heavy loads at ultra-high speed; the patent 200910166299.7 uses multi-stage gas-liquid mixing cylinders to avoid high-speed sealing problems, but when the cylinders of each stage move to the end of the stroke, there is no buffer structure, which will cause mutual interaction between the stages. Collision will easily damage the ejection device, and the structural design of the multi-stage cylinder has inherent problems that it is impossible to fill the liquid to the end and replace the internal oil.

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