STRUCTURE OF ROTARY MECHANISM PART OF ROTARY FLOWMETER

摘要

PURPOSE:To reduce the ineffective flow rate of fluid and to improve the follow-up performance, i.e. response of a rotary body to variation in flow rate by forming many axial recess-projection stripes at the outer periphery part of the rotary body and sectioning discharge passages in a rectangular shape which is long in the axial direction. CONSTITUTION:When the fluid (a) is made to flow in an upper turn chamber 19 through an intake 20, the fluid (a) turns in the turn chamber 19 in one direction and flows in respective discharge passages 26 in a lower turn chamber 22. Then the fluid (a) which is discharged from the discharge passages 26 becomes vertically thin and long and is discharged to the rotary body 28 in its tangential direction. Consequently, the rotary body 28 receives the fluid (a) almost uniformly and orthogonally in the entire lengthwise area of the projection-recess stripes and is rotated by the motion energy of the fluid (a). Then the fluid (a) colliding against the rotary body 28 passes through the gap part between a housing 25 and the rotary body 28 to float the rotary body and flows from its axis part to a discharge hole 23, so that the fluid is discharged from the housing 25.