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在做气垫导轨实验时,常因找不到合适的气源,给实验带来很多的困难。用气泵虽然是理想的,但是搬运麻烦,并且需要220V交流电。这里介绍一个笔者用过的“土”方法,可供参考。 实验装置如附图所示,它的原理是通过打气筒不断向气球中充气,打开阀门,气球就可以放出持续的气流,从而使气垫导轨正常工作。 打气筒是平时街上见到的充气球用的脚踩打气筒,气球也是普通的玩具气球。找一个大小适中的实验室用橡皮塞,橡皮塞上穿两个玻璃管,然后把橡皮塞放在气球开口部,用细线扎
When doing air-guided rail experiments, it is often difficult to find experimental results because of the lack of a suitable source of air. Although the air pump is ideal, it is troublesome to handle and requires 220V AC power. Here is a reference to the “earth” method that I have used. The experimental device is shown in the figure. Its principle is to inflate the balloon continuously through the pump and open the valve. The balloon can release continuous air flow, so that the air-cushion guide can work normally. The pump is a foot pump for inflatable balls that is usually seen on the street. The balloon is also an ordinary toy balloon. Find a laboratory rubber plug of modest size. Put two glass tubes on the rubber stopper. Then put the rubber stopper on the opening of the balloon.