scholarly journals Installation of Air Lubrication System for Ro-Pax Ferry and Verification of its Effect in Actual Seas Based on Onboard Measurement Data

2019 ◽  
Vol 29 (0) ◽  
pp. 1-9 ◽  
Author(s):  
Shuji Mizokami ◽  
Ryota Kuroiwa
Keyword(s):  
Measurement Data ◽  
Lubrication System ◽  
Air Lubrication ◽  
Actual Seas

scholarly journals Development of Air lubrication system and verification by the full scale ship test

2010 ◽  
Vol 12 ◽  
pp. 69-77 ◽  
Author(s):  
Shuji Mizokami ◽  
Chiharu Kawakita ◽  
Youichiro Kodan ◽  
Shinichi Takano ◽  
Seijiro Higasa ◽  
...  
Keyword(s):  
Full Scale ◽  
Lubrication System ◽  
Air Lubrication

A comparative study on simulation and experiment of oil-air lubrication unit for high speed bearing

2016 ◽  
Vol 68 (3) ◽  
pp. 325-335 ◽  
Author(s):  
Qunfeng Zeng ◽  
Jinhua Zhang ◽  
Jun Hong ◽  
Cheng Liu
Keyword(s):  
Low Temperature ◽  
Rotational Speed ◽  
Machine Tools ◽  
High Speed ◽  
Design Method ◽  
Simulation Method ◽  
Lubrication System ◽  
Content Type ◽  
Air Lubrication ◽  
Grinding Machine

Purpose The purpose of this paper is to design an oil-air lubrication system with low temperature rise, vibration and noise simplifies the spindle configuration. The oil-air lubrication unit is a key component for high-speed grinding machine tools. The development of oil-air lubrication unit suitable for high/ultrahigh rotational speed is a daunting task owing to the lubrication challenges. Design/methodology/approach This paper emphasizes three main issues: the analysis of oil-air two-phase flow for tradition oil-air lubrication unit with the simulation method; the design of new oil-air lubrication unit for the high/ultrahigh-speed grinding machine tools and the comparative experiment research of tradition and new oil-air lubrication unit. The optimum structure parameters that create the optimum flow pattern and operating conditions resulting in low temperature increase, vibration and noise of oil-air lubricated spindle can be achieved by the simulation method and experiments. Findings The simulation and experimental results show that new oil-air lubrication unit lubricating a high speed electric spindle has a better performance with a small temperature increase and vibration, which means that our proposed method is an effective design method for oil-air lubrication system. Originality/value A design method suitable for high-speed oil-air lubrication unit is proposed. New oil-air lubrication unit is expected to apply for high/ultrahigh rotational speed grinding machine tools.

scholarly journals Air-lubrication System for Module Carriers (M.V.YAMATAI / M.V.YAMATO)

2011 ◽  
Vol 46 (6) ◽  
pp. 877-879
Author(s):  
Shingo Mizutani ◽  
Tomoki Inoue
Keyword(s):  
Lubrication System ◽  
Air Lubrication

Analysis for the Fluctuation Characteristics of Annular Flow in the Oil-Air Lubrication System

2014 ◽  
Vol 487 ◽  
pp. 408-412
Author(s):  
Qi Guo Sun ◽  
Ali Cai ◽  
Zheng Hui Zhou ◽  
Zhi Hong Li ◽  
Xiong Shi Wang
Keyword(s):  
Pressure Drop ◽  
Film Thickness ◽  
Liquid Film ◽  
Annular Flow ◽  
Lubrication System ◽  
Air Velocity ◽  
Film Distribution ◽  
Air Lubrication ◽  
Calculation Results ◽  
Simulation Results

Fluctuation characteristics of the pressure drop distribution and liquid film distribution along a pipe of the oil-air annular flow in oil-air lubrication system are calculated respectively introducing Chisholm constant c base on the Chisholm theory and simulated by Fluent in this paper. The results show that the theoretical calculation results of the pressure drop and liquid film agree qualitatively with the simulation results, and the fluctuation characteristics of the pressure drop and liquid film thickness are augmented respectively when the air velocity increases. These conclusions will do favors for predicting and controlling the lubricant in the oil-air lubrication system.

Study on Distribution Performance of a New Oil-Air Distributor in Oil-Air Lubrication System

2014 ◽  
Vol 889-890 ◽  
pp. 352-357
Author(s):  
Qi Guo Sun ◽  
Zheng Hui Zhou ◽  
Hong Bo Lv ◽  
Yue Fei Wang
Keyword(s):  
Two Phase Flow ◽  
Phase Distribution ◽  
Spherical Surface ◽  
Flow Distribution ◽  
Domain Model ◽  
Conical Surface ◽  
Phase Flow ◽  
Lubrication System ◽  
Two Phase ◽  
Air Lubrication

The fluid domain model of a new oil-air distributor in oil-air lubrication system is built and the phase distribution of oil and air two-phase flow on distribution interface is simulated based on the CFD model in Fluent, the mass flow rate of oil and air are collected from three different cross sections when the structures of oil-air guidance slot are designed as a plane, sphere and cone shape respectively, then the influence of oil-air guidance slot structure on the performance of distributor is analyzed in the oil-air lubrication system in this paper. The results show that the spherical surface and conical surface of oil-air guidance slot can improve the uniformity and stability of the oil and air two-phase flow distribution, promote the flow pattern to form a continuous annular oil film. Among these three structures of oil-air guidance slot, we also find that the distribution performance of conical surface is the best.

Experiment of Effects of Oil Volume-Per-Cycle on Oil Film’s Thickness under Oil-Air Lubrication

2014 ◽  
Vol 620 ◽  
pp. 476-480
Author(s):  
Qi Guo Sun ◽  
Zheng Hui Zhou ◽  
Yue Fei Wang
Keyword(s):  
Annular Flow ◽  
Evaluation Criterion ◽  
Lubrication System ◽  
Special Test ◽  
Test Rig ◽  
Two Phase ◽  
Oil Film ◽  
System Experiment ◽  
Air Lubrication

Abstract: Thickness of oil film, a parameter of an oil-air lubrication system, is an important evaluation criterion for two-phase annular flow flowed in the system. Experiment of the effects of oil volume-per-cycle on oil film’s thickness is done on a special test rig using ECT technology, and then the changing rule of oil film’s thickness is analyzed in this paper. The results show that, at the first the thickness of oil film is thinness and weakness, and then it changes to thickness and stabilization, at the last the oil focusing on the bottom of tube. The break of annular flow and the blocking of oil at elbow tube have been studied experimentally and theoretically.

scholarly journals Assessment of the Propulsion System Operation of the Ships Equipped with the Air Lubrication System

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1357
Author(s):  
Mariusz Giernalczyk ◽  
Piotr Kaminski
Keyword(s):  
Fuel Consumption ◽  
Propulsion System ◽  
Operating Parameters ◽  
Lubrication System ◽  
System Operation ◽  
Propulsion Efficiency ◽  
Fuel Consumption Reduction ◽  
Consumption Reduction ◽  
Air Lubrication ◽  
Operation Parameters

This paper is an attempt to evaluate the effectiveness of the ship’s hull air lubrication system in order to reduce the drag leading to fuel consumption reduction by ships. The available papers and reports were analyzed, in which records of the operation parameters of the propulsion system of ships equipped with this system were presented. These reports clearly show the advantages of using air lubrication system. On the basis of collected operating parameters of the propulsion system the authors performed analysis of operation effectiveness of the Air Lubrication System on the modern passenger ship was. The results of this analysis do not allow for a clearly positive opinion about its effectiveness. Additionally, the conditions that should be met for the system to be more effective and to significantly increase the propulsion efficiency were indicated.

Sign in / Sign up

Export Citation Format

Share Document