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1. 发明专利

JPS63120224A APPARATUS FOR MEASURING FLOW RATE OF FLUID 失效
公开(公告)号：JPS63120224A
公开(公告)日：1988-05-24
申请号：JP26557486
申请日：1986-11-10
申请人： MITSUI TOATSU CHEMICALS
发明人： SHIMOMURA TAKAO , MACHII AKIO
IPC分类号： G01F1/20 , G01F1/32
摘要： PURPOSE:To improve the flow rate characteristic in a low flow rate region, by utilizing the self-exciting vibration of a vibration body due to flow and arranging a column behind the vibration body having a vibration shaft bonded thereto in parallel to the vibration shaft. CONSTITUTION:A trigonal prism-shaped vibration body 1 is bisymmetric with respect to a vibration shaft 5 to allow the front surface 3 thereof to oppose to flow and vertically supported in a freely revolvable manner with respect to the flow by the vibration shaft 5 positioned a little to the front along the center line of the vibration body 1 and the tail fin part 4 thereof is positioned on the downstream side to be subjected to the swinging vibration proportional to the flow rate of a fluid. The column 2 arranged parallel to the vibration shaft 5 is provided at the position slightly separated from the rear end of the tail fin part 4 at the rear position of the vibration body 1, and the sizes of both of the vibration body 1 and the column 2 and the interval therebetween are determined at experimentally pref. positions. By this method, linearity is obtained even in a low flow rate region of 5m /hr and the expansion of a measuring range to the low flow rate region becomes possible by a simple remodeling.

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