What is the purpose of this groove in the rotameter?
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Why is the lower end of the rotameter not circular but grooved? I understand that if it is circular, the rotor will keep rotating; whereas if it is grooved, the rotor will not rotate and will remain at a certain angle. Also, if the groove opening is too large, will it cause instability in the rotor and lead to up-and-down movement?
This post was last edited by liaifeng on 2020-8-19 23:01. With a circular opening, the rotor is subjected to even force from all four sides; it probably won’t rotate, but rather move up and down? But the rotor of the physical rotameter we see is the one that rotates. Here is an additional schematic diagram; indeed, it features an eccentric chest design. https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1597859012614&di=bb332f84ed6e6394d441e98e8a27c5de&imgtype=0&src=http%3A%2F%2Fwww.4006665262.com%2Fuploads%2Fallimg%2F140208%2F1-14020Q426122a.jpg
Personally, I think it only serves to prevent the float from being installed backwards; if one isn’t careful with the rounded ends, it might be installed incorrectly.