| 摘要 |
PURPOSE:To improve reliability by incorporating a rotor member which is thread-cut double in the rotor chamber of a casing in an eccentric rotation state and fixing a stator member which is a single-thread spiral screw, and measuring a passing flow rate through eccentric rotation. CONSTITUTION:The cylindrical rotor chamber 3 is formed in the casing that a fluid passage penetrates, and the external cylindrical rotor member 4 in which a double-thread helical female screw is bored is incorporated so that the rotor member rotates on its own axis eccentrically and revolves around the axial line 6 of the casing. Then, large-diameter rolling flange parts 7 are formed at both ends of the rotor member 4, the stator member 10 whose outward appearance is the single-thread helical screw is arranged in the two-thread helical female screw 8, and both end fixed shafts 11 and fitted and fixed in shaft fixation part 12 extended into the casing 1. Consequently, the structure is simple and fluid is measured without any influence of the mixture of sand, etc.
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