Device for ejecting water column by inertia effect based on load technology of gas gun
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摘要: 基于气体炮加载技术和惯性抛射原理，研制了一套水冲击实验装置，可实现规则形状水柱按照设定速度发射。该装置在活塞推射技术的基础上，设计了一个抛射筒取代活塞，将水柱装在抛射筒内；利用气体炮产生的动力加载抛射筒，达到设定速度时撞击缓冲件得到减速，筒内水柱在惯性作用下飞出。抛射筒材料采用高强度合金钢，缓冲件材料采用橡胶，抛射筒在装置发射水柱后可再次使用。使用该装置开展了Ø200 mm×1 m尺寸水柱的发射实验，水柱速度及形状均满足水冲击实验的要求；采用非接触的光电测速方法测量了发射速度，与理论计算结果比较符合。Abstract: Based on load technique of gas gun and inertia projecting method, a device is developed to eject water column with desired speed and regular shape for hydraulic impact tests.Referring to piston push technology, this device used a projecting cylinder filled with water to replace piston.Under huge push of gas gun, the cylinder is accelerated and will impact buffer when arriving to desired speed, then water column in the cylinder will be ejected under inertial function because the cylinder suddenlly halts.The cylinder is made of alloy steel of high strength, and can be used again after impacting buffer made of rubber material.Using this device, water column with regular shape(Ø200 mm×1 m)is ejected, and satisfyed requirement of hydraulic impact tests.Ejecting speed is gained by photoelectric measurement method, corresponding to results of theoretic calculation.
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图 1 基于气体炮加载技术的惯性抛射原理示意图
Figure 1. Schematic diagram of inertia projecting based on load technology of gas gun
图 2 水柱惯性抛射的模拟分析结果
Figure 2. Simulation analysis of ejecting water column by inertia effect
图 4 水柱惯性抛射的模拟分析结果
Figure 4. Simulation analysis of ejecting water column by inertia effect
图 5 抛射筒发射速度的非接触式测量方法
Figure 5. Uncontacted method for measuring speed of projecting cylinder
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