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1. WO2009093342 - POSITIVE DISPLACEMENT FLOWMETER

Publication Number WO/2009/093342
Publication Date 30.07.2009
International Application No. PCT/JP2008/054019
International Filing Date 06.03.2008
IPC
G01F 3/10 2006.1
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
3Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
02with measuring chambers which expand or contract during measurement
04having rigid movable walls
06comprising members rotating in a fluid-tight or substantially fluid-tight manner in a housing
10Geared or lobed impeller meters
CPC
G01F 3/10
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
3Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
02with measuring chambers which expand or contract during measurement
04having rigid movable walls
06comprising members rotating in a fluid-tight or substantially fluid-tight manner in a housing
10Geared or lobed impeller meters
Applicants
  • 株式会社オーバル OVAL Corporation [JP]/[JP] (AllExceptUS)
  • 小野 精悟 ONO, Seigo [JP]/[JP] (UsOnly)
  • 内田 勝一 UCHIDA, Katsuichi [JP]/[JP] (UsOnly)
Inventors
  • 小野 精悟 ONO, Seigo
  • 内田 勝一 UCHIDA, Katsuichi
Agents
  • 高野 明近 TAKANO, Akichika
Priority Data
2008-01352924.01.2008JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) POSITIVE DISPLACEMENT FLOWMETER
(FR) DÉBITMÈTRE À DÉPLACEMENT POSITIF
(JA) 容積流量計
Abstract
(EN) A positive displacement flowmeter having a pair of non-circular gears in a rolling contact on a pitch line without slippage. The positive displacement flowmeter comprises a casing (3) and a pair of rotors (1, 2) provided in the casing (3) and rotatable around its center axes (4, 5). The pair of rotors (1, 2) have a tooth profile curve which is an oval pitch curve itself having a trajectory of contact points on the pitch line, and they satisfy a condition of r1+r2=K=const r11=r22, and a moving radius of the oval pitch curve is given by ri=a/(1-bcosnθi)(i=1,2), where “ri(i=1, 2)” is the moving radius that is a distance from a center of rotation to the oval pitch curve, “a” is a homothetic coefficient, “b” is a flatness, “n” is a number of lobes, and “θi(i=1, 2)” is a moving angle.
(FR) La présente invention concerne un débitmètre à déplacement positif comportant une paire de pignons non circulaires en contact cylindrique sur une ligne d'engrènement sans glissement. Ce débitmètre à déplacement positif comporte un corps (3) et une paire de rotors (1, 2) montés dans le logement (3) et capables de rotation autour de leurs axes centraux (4, 5). Les deux rotors (1, 2) présentent, d'une part une courbe de profils des dents donnant une courbe de ligne d'engrènement ovale présentant elle-même une succession de points de contact se situant sur la ligne d'engrènement de façon que r1+r2=K=const r11=r22, et d'autre part un rayon mobile de la courbe de ligne d'engrènement ovale telle que ri=a/(1-bcosnθi)(i=1,2), où 'ri(i=1, 2)' est le rayon mobile correspondant à une distance entre le centre de rotation et la courbe de ligne d'engrènement ovale, 'a' est un coefficient d'homothétie, 'b' est une planéité, 'n' est un nombre de lobes, et 'θi(i=1, 2)' est un angle mobile.
(JA)    ピッチライン上で滑りのないコロガリ接触を行う一対の非円形歯車を持つ容積流量計を提供する。容積流量計は、ケーシング3と、ケーシング3内に軸心4,5を中心として回転可能に設けられた一対の回転子1,2とを備える。一対の回転子1,2は、ピッチライン上に接触点の軌跡を有するオーバルピッチ曲線自体を歯形曲線とし、r+r=K=const.r・dθ=r・dθの条件を満たし、オーバルピッチ曲線の動径は、r=a/(1-bcosnθ)(i=1,2)、(但し、r(i=1,2)は動径で回転中心からオーバルピッチ曲線までの距離、aは相似係数、bは扁平度、nは葉数、θ(i=1,2)は動角)で表される。
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