Analysis of Nonlinear Time-Domain Lubrication Characteristics of the Hydrodynamic Journal Bearing System

被引：2
作者：
Lin, Changgang [1 ,2 ,3 ]
Jian, Fan [4 ]
Sun, Shili [4 ]
Sima, Can [1 ,2 ,3 ]
Qi, Libo [1 ,2 ,3 ]
Zou, Mingsong [1 ,2 ,3 ]
机构：
[1] China Ship Sci Res Ctr, Wuxi 214082, Peoples R China
[2] Taihu Lab Deep Sea Technol Sci, Wuxi 214082, Peoples R China
[3] State Key Lab Deep Sea Manned Vehicles, Wuxi 214082, Peoples R China
[4] Harbin Engn Univ, Coll Shipbldg Engn, Harbin 150001, Peoples R China
来源：
LUBRICANTS | 2023年 / 11卷 / 03期
基金：
中国国家自然科学基金;
关键词：
time-domain; lubrication; hydrodynamic; journal bearing; inertia force; OIL-FILM; ROTOR; PERFORMANCE; STABILITY; DYNAMICS;
D O I：
10.3390/lubricants11030145
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The nonlinear time-domain lubrication characteristics of the hydrodynamic journal bearing system are studied in this paper. The motion equation of the hydrodynamic journal bearing system is established based on the balance of the relationship among the water film force, journal inertia force, and external load. The water film pressure distribution of the sliding bearing is calculated by the finite difference method. Firstly, the variation law of the water film pressure distribution with time under the external periodic load is calculated considering the inertial force of the journal. The influence of the initial eccentricity on the orbit of the journal center is studied. Secondly, the maximum water film pressure, the orbit of the journal center, eccentricity, water film pressure, and the minimum water film thickness of the bearing under the action of circumferential and unidirectional periodic external loads are calculated, and the effects of inertial force and rotational speed on the dynamic characteristics of the bearing are analyzed. Finally, the water film dynamic characteristics under low speed and heavy load are studied. The result shows that the pressure of the dimensionless water film caused by inertial force is reduced by 7 to 10 percent at the rotational speed between 200 r/min and 800 r/min, which means that the influence of inertia force cannot be ignored.
引用
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页数：28
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