A Novel Approach for Identifying Gas Cavitation in Oil Jet Pumps for Lubrication Systems

摘要

Gas cavitation has significant influence on the performance of oil jet pumps for lubrication systems in turbo machinery. This study provides a novel approach for identifying gas cavitation in oil jet pumps. It accounts for the physical process of gas cavitation and its effect on the performance of oil jet pumps The performance of oil jet pumps, such as their entrainment ability, efficiency, cavitation erosion, vibration, noise, vapour volume fraction, and pressure distribution under variable working conditions, are systematically measured and quantified from experimental and numerical simulation results Based on the frequency characteristics of the cavitation process and its action mechanism on the performance of oil jet pumps, a novel approach for the identification of gas cavitation is provided. Results show that gas cavitation emerges in a fairly wide working range of oil jet pumps for lubrication systems Here, the dissolved air content in lubrication oil is 6.3 times larger than that in water, and the oil jet pump is more prone to suffer from cavitation than a water jet pump by 16 %. This study promotes a deeper understanding of the mechanics of gas cavitation effects on the fluid machinery in lubrication systems.