Bubble Elimination in Hydraulic Fluids: Part I - Basic Principle and Technology Overview

摘要

Eliminating bubbles from fluids, preventing degradation of liquids, as well as avoiding damages to fluid components are important engineering issues. One of the authors, Mr. R. Suzuki, has developed a new device that utilizes a swirling flow to eliminate bubbles in liquids and decrease dissolved gases. The device is called "Bubble Eliminator." This paper offers a basic principle and technological overview of the bubble eliminator for fluids. The swirling flow pattern and pressure distributions in the bubble eliminator greatly affect performance of the bubble removal. In this paper the swirling flow pattern is shown in a transparent bubble eliminator. The result of it is compared with a numerical simulation and the effective bubble removal is verified. Additionally, this paper documents a removable rate of trapped air from the fluid. Performance of the device is tested and evaluated by fluid temperature rise in a reservoir in a hydraulic test circuit.