FLOW PASSAGE FORMING STRUCTURE, FLOW RATE MEASURING DEVICE, AND FLOW RATE CONTROLLER

• Main Authors: IEKI ATSUSHI, OKANO HIROYUKI
• Format: Patent
• Language: English; Japanese
• Published: 31.05.2018
• Subjects: MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To provide a flow passage forming structure which can suppress the shake of a shaft body with respect to the center axis of the flow passage generated when the shaft body is inserted into the flow passage.SOLUTION: The flow passage includes: a flow passage through which a fluid passes; and a shaft body 40 inserted in the flow passage. The upper side of the shaft body 40 and the inner surface of the flow passage are in contact with each other at a plurality of positions with different phases, and the lower side of the shaft body 40 and the inner surface of the flow passage are in contact with each other at a plurality of positions with different phases. A fluid flows in the gap between the shaft body 40 and the inner surface of the flow passage, and one of the contact positions in one of the upper and lower sides has different phases from the phases of the contact positions in the other of the upper and lower sides.SELECTED DRAWING: Figure 2 【課題】流路形成構造において、流路に対して軸体を挿入する際に生じる、流路の中心軸に対する軸体の軸ぶれを抑制する。【解決手段】流体が通過する流路と、流路に挿入される軸体４０と、を具備し、軸体４０の上流側と流路の内周面とが、位相の異なる複数の位置で接触し、軸体４０の下流側と流路の内周面とが、位相の異なる複数の位置で接触し、軸体４０と流路の内周面との間の隙間に流体が流れるものであって、上流側又は下流側のうちの一方側の接触位置のいずれかが、他方側の全ての接触位置とは位相が異なる。【選択図】図２