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

A gas-liquid mixing and self-buffering technology, which is applied in the direction of fluid pressure actuation devices, can solve the problems of poor sealing effect, easy damage to ejection devices, and difficulty in ensuring sealing performance, so as to reduce relative motion speed, ensure buffering effect, Effects that are easy to precisely control

Active Publication Date: 2017-12-12
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Embodiment

[0027] combine Figure 1 to Figure 5 :

[0028] A self-buffering gas-liquid mixed multi-stage ejection mechanism, including an outer cylinder body 1, an oil-filled end cover 2, an air intake end cover 3 and a four-stage sleeve type piston cylinder, an oil-filled end cover 2 and an air intake end cover 3 They are respectively fixed at both ends of the outer cylinder body 1, the oil-filled end cover 2 and the outer cylinder body 1 are oil-sealed, and the air-intake end cover 3 and the outer cylinder body 1 are air-tight; the outer cylinder of the four-stage sleeve type piston cylinder The layer piston cylinder 6 includes the extension end 7 of the outer layer piston cylinder, the outer layer piston cylinder body 9 and the outer layer piston end 8 in sequence, and the outer layer piston end 8 of the outer layer piston cylinder 6 is adjacent to the end surface of the oil chamber 4 There is a channel communicating with the inner cavity of the outer piston cylinder 6, the channel h...

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Abstract

The invention discloses a self-buffering gas-liquid mixing multi-stage ejection mechanism, which uses gas as a power source, oil as a pressure transmission medium, and combines the form of multi-stage piston cylinders sliding and cooperating with each other to form a gas-liquid mixing multi-stage ejection mechanism , which reduces the relative motion speed of the moving parts at all levels of the ejection mechanism, effectively reduces the sealing difficulty during high-speed ejection, and can realize high-speed ejection within a limited motion stroke; the throttling buffer structure, oil buffer and unloading groove are adopted. Combined, the self-buffering function of the multi-stage ejection mechanism is realized, and an oil filling port is opened to facilitate oil filling and oil change maintenance; the invention can be applied to military and civilian ejection of carrier-based aircraft, missiles, unmanned aerial vehicles, ejection experimental devices, etc. In many fields, the sealing performance is reliable, and it can provide ejection with self-buffering function under the condition of limited installation space, with high efficiency and good controllability.

Description

technical field [0001] The invention belongs to the technical field of ejection devices, in particular to a self-buffering gas-liquid mixing multistage ejection mechanism. Background technique [0002] At present, the main ejection methods are gun type, gas type, steam type, compressed air type, hydraulic type, hydraulic pneumatic type, electromagnetic type and so on. [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 ejec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B15/16F15B15/20F15B15/22
Inventor 任锐马大为姚琳王泽林何强
Owner NANJING UNIV OF SCI & TECH
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