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在进行牵引电机温升试验时 ,准确快速地测定电机的通风量至关重要。本文论述了流体力学中伯努利方程及其在流量测试中的应用。笛形管测试流量的理论依据同样是伯努利方程 ,由笛形管及有关特殊设计的电子线路构成了风量自动测定装置 ,与传统测定装置的比较试验说明了该自动测定装置设计合理 ,测定精度高
In the traction motor temperature rise test, accurate and rapid determination of motor ventilation is essential. This article discusses the Bernoulli equation in fluid mechanics and its application in flow testing. The theoretical basis of the test flow of the whip pipe is also the Bernoulli equation. The whistling pipe and the specially designed electronic circuit constitute an automatic measuring device of the air volume. Compared with the conventional measuring apparatus, the comparative experiment shows that the automatic measuring apparatus is designed rationally, High precision