Heavy load characteristics of micro-beveled heavy-duty hydrostatic bearing lubricant oil film

2020 ◽  
pp. 135065012092049
Author(s):  
Zhang Yanqin ◽  
Luo Yi ◽  
Ni Shiqian ◽  
Zhang Zhiquan
Keyword(s):  
Compensation Effect ◽  
Dynamic Pressure ◽  
Fluid Velocity ◽  
Lubricating Oil ◽  
Heavy Load ◽  
Oil Film ◽  
Lubricant Oil ◽  
Pressure Compensation ◽  
Volume Method ◽  
The Mathematical Model

This paper is based on the new Q1-205 micro-beveled double rectangular cavity heavy hydrostatic thrust bearing. According to the hydrostatic and dynamic pressure lubrication theory, the mathematical model of the dynamic and static bearing capacity of micro-beveled oil film is established under the conditions of considering the bearing oil supply system and the actual structural of the oil pad. Based on the finite volume method, the lubricating performance of the oil film is numerically simulated under heavy load of 10t, 15t, 20t, 25t and 30t, and the comprehensive influence law of oil cavity pressure, fluid velocity, vorticity and flow rate is revealed under the influence of extreme working conditions such as heavy load. Finally, the oil film pressure field affected by heavy load is tested under certain wedge parameters and rotational speed and verifies the theoretical analysis and simulation. It is found that the experimental and theoretical result of bearing is consistent with each other under heavy load. The dynamic pressure compensation effect of the bearing is better under the wedge oil pad condition. However, under heavy load, the extrusion and heating of lubricating oil are serious, which make the viscosity of lubricating oil drops sharply. In addition, the dynamic pressure effect of wedge oil pad is less affected by load. The compensation effect decreases slightly with the increase of load. The dynamic pressure compensation range of the bearing is 30%–10% under heavy load.

Influence of Working Parameters on Dynamic Pressure Effect of Heavy Constant Flow Hydrostatic Center Rest

2013 ◽  
Vol 274 ◽  
pp. 82-86
Author(s):  
Bo Wu ◽  
Xiao Dong Yu ◽  
Xue Mei Chang ◽  
Chao Yin
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Pressure Field ◽  
Pressure Effect ◽  
Dynamic Pressure ◽  
Lubricating Oil ◽  
Constant Flow ◽  
Oil Film ◽  
Working Parameters ◽  
Volume Method

In order to increase the working performance of a heavy constant flow hydrostatic center rest, a theoretical study concerning the lubricating oil film dynamic pressure effect of the heavy constant flow hydrostatic center rest is described. The Computational Fluid Dynamics and the Finite Volume Method have been used to compute numerically the static pressure field and the total pressure field of the lubricating oil film. The influences of spindle rotating rate, lubricating oil dynamic viscosity and inlet flow rate on the lubricating oil film dynamic pressure effect of the heavy constant flow hydrostatic center rest were analyzed based on the computational fluid dynamics and lubrication theory, and the influencing laws were revealed. By means of this method, the reasonable data can be provided for reasonably controlling dynamic pressure and structure optimal design of the heavy constant flow hydrostatic center rest.

scholarly journals A Study on the Effect of Elastic Deformation on the Performance of Dynamic Pressure Oil Film Bearing of the Ships

2014 ◽  
Vol 8 (1) ◽  
pp. 462-468
Author(s):  
Chao Liu ◽  
Fan-Chun Li
Keyword(s):  
Elastic Deformation ◽  
High Speed ◽  
Dynamic Pressure ◽  
Heavy Load ◽  
Oil Film ◽  
Low Elastic Modulus ◽  
The Difference ◽  
Coupling Algorithm ◽  
Oil Films ◽  
Oil Film Pressure

Dynamic pressure oil film bearing is an important mechanical component of the ship. With the development of large-sized ships, their dynamic pressure oil films often run at high speed and under heavy load generating high oil film pressure. In addition, due to the increased use of thin walled bearing shell with materials of low elastic modulus, the elastic deformation of the bearing shell which is in dynamic pressure oil film bearing cannot be ignored. During computation, if the effect of elastic deformation on the performance of dynamic pressure oil film bearing is ignored as is usually the practice, the difference between the theoretical and the actual results will be enormous. Therefore, this article has taken the effect of bearing shell's elastic deformation on bearing performance as the research target. A coupling algorithm program in Matlab is written to simulate and solve the oil film bearing dynamic pressure lubrication theory, considering elastic deformation of bearing shell in a way that is more aligned with the actual working conditions. A comparison is conducted between the above results and the results with no consideration of elastic deformation and the process and regularity of the effect of elastic deformation and other factors on the performance of oil film bearing shell in operation under dynamic lubrication are analyzed. Therefore, more accurate theoretical basis can be provided for the design and fault diagnosis of dynamic pressure oil film bearing of the ships.

scholarly journals Analysis of the multiphase lubricating oil effect on the performance of the tilting-pad journal bearing

2021 ◽  
pp. 92-92
Author(s):  
Yuchuan Zhu ◽  
Zhengyi Jiang ◽  
Ling Yan ◽  
Yan Li ◽  
Fangfang Ai ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
High Speed ◽  
Journal Bearing ◽  
Lubricating Oil ◽  
Loading Capacity ◽  
Heavy Load ◽  
Oil Film ◽  
Tilting Pad ◽  
Multiphase Fluid ◽  
Tilting Pad Journal Bearing

The multiphase fluid dynamics is used to model the oil film in the tilting-pad journal bearing. Particles are added to the lubricating oil and the change of loading capacity of oil film is studied numerically. The performance of the bearing under high-speed and heavy load are elucidated. The results show that the bearing capacity depends upon concentration, diameter and density of particles.

Summary of Research on Oil Film Temperature Characteristic of Hydrostatic and Hydrodynamic Thrust Bearings

2021 ◽  
Vol 14 ◽  
Author(s):  
Yanan Feng ◽  
Xiaodong Yu ◽  
Zelin Han ◽  
Shihao Li ◽  
Bangyao Tang ◽  
...  
Keyword(s):  
Temperature Rise ◽  
Thrust Bearing ◽  
Friction Pair ◽  
Dynamic Pressure ◽  
Operational Reliability ◽  
Lubricating Oil ◽  
Research Directions ◽  
Oil Film ◽  
Specific Research ◽  
Thrust Bearings

Background: In order to explore the temperature rise and distribution of the micro-gap lubricating oil film of the hydrostatic and hydrodynamic thrust bearing, further solve the problem of thermal deformation of the friction pair of the hydrostatic and hydrodynamic support and improve the operation accuracy and stability of the hydrostatic and hydrodynamic thrust bearing. Objective: Combined with the theory of dynamic and static pressure bearings, the problem of lubricating oil film temperature rise is analyzed, and specific research directions are proposed. It is hoped that it will be helpful to improve the research of bearing stability and provide a theoretical basis for the structural design and operational reliability of heavy hydrostatic bearings. Methods: This article summarizes the research status of the oil film temperature rise of hydrostatic and hydrodynamic thrust bearings, especially focusing on the influence of hot oil carrying on the temperature rise of the lubricating oil film, and finally the specific research directions and methods of the oil film temperature rise are prospected. Conclusion: Aiming at the research hotspots of lubricating oil film temperature rise and distribution, based on the analysis of the principle of hydrostatic and dynamic pressure bearings, the domestic and foreign literature on the influence of the micro-gap lubricating oil film temperature rise and distribution of hydrostatic and hydrodynamic thrust bearings is collected and analyzed. The research shows that although some research results have been made in this area, due to current research methods and angle analysis still have certain limitations, so the study of the oil film temperature rise is not comprehensive, and further detailed discussion and analysis are still needed.

scholarly journals Analysis of fluid–solid coupling characteristics of tripod sliding universal coupling based on cavitation and thermal effects

2020 ◽  
Vol 12 (5) ◽  
pp. 168781402092007
Author(s):  
Fuqin Yang ◽  
Jingwei Jiang ◽  
Dong Li ◽  
Linlin Sun
Keyword(s):  
Pressure Difference ◽  
Thermal Effects ◽  
Lubricating Oil ◽  
Ideal Condition ◽  
Oil Film ◽  
Lubricant Oil ◽  
Study Results ◽  
Calculation Results ◽  
Coupling Characteristics ◽  
Universal Coupling

In this article, a fluid–solid coupling analysis of tripod sliding universal coupling and lubricating oil film was conducted by taking into consideration cavitation and thermal effects. The coupling of the sleeve and slip pin with the lubricant oil film under different pressure differences and frequencies was investigated. Moreover, the study results were compared with the results of fluid–solid coupling under the ideal condition of negligible cavitation and thermal effects. When considering these effects, the deformation and stress values of the sleeve and the slip pin gradually increase as the pressure difference and frequency increase. The deformation and stress values of the sleeve are reduced relative to the calculation results of fluid–solid coupling in ideal conditions. However, the values of the slip pin are increased. Furthermore, when considering the thermal effect, the deformation and stress differences for the sleeve and slip pin decrease as the pressure difference increases. The stress difference of the sleeve grows sharply, whereas the deformation difference of the slip pin increases only slightly as the frequency increases.

The Research of Lubricating and Colling System of the Low-Speed and Heavy-Load Sliding Bearing

2013 ◽  
Vol 744 ◽  
pp. 95-99
Author(s):  
Pei Ming Sun ◽  
Xie Ben Wei ◽  
Shu Qin Chen
Keyword(s):  
Cooling System ◽  
Water Channel ◽  
System Structure ◽  
Lubricating Oil ◽  
Heavy Load ◽  
Monitoring Method ◽  
Sliding Bearing ◽  
Oil Film ◽  
Low Speed ◽  
Lubrication Performance

This paper analyzes the influence of lubricating oil film of the low-speed and heavy-load sliding bearing on a variety of factors. It introduces the operation of Bearing for lubricating oil film in monitoring method, common fault causes and treatment measures. Finally, the bearing cooling system structure is discussed, providing reference for practical engineering application. There are many reasons to cause the failure of the bearing lubrication such as bearing assembly defects, the error of size and cooling system problems. By detecting and contrast parameters, this study analyze the determine data and correct the fault. Through the use of reasonable structure of the oil tank and cooling water channel, we can improve the lubrication performance, and extend the bearing life. This paper analyzes the factors restricting the low speed and high load sliding bearing lubricant film, and solves the actual bearing lubrication problem.

The Numerical Analysis of the Velocity and Pressure Distribution of the Oil Film in Heavy Hydrostatic Thrust Bearing

2014 ◽  
Vol 541-542 ◽  
pp. 658-662
Author(s):  
Jian Li ◽  
Yuan Chen ◽  
Yang Chun Yu ◽  
Zhu Xin Tian ◽  
Yu Huang
Keyword(s):  
Mathematical Model ◽  
Numerical Analysis ◽  
Pressure Distribution ◽  
Working Conditions ◽  
Thrust Bearing ◽  
Rotation Speed ◽  
The Other ◽  
Surface Load ◽  
Oil Film ◽  
Volume Method

To study the velocity and pressure distribution of the oil film in a heavy hydrostatic thrust bearing, a mathematical model of the velocity is proposed and the finite volume method (FVM) has been used to simulate the flow field under different working conditions. Some pressure experiments were carried out and the results verified the correctness of the simulation. It is concluded that the pressure distribution varies small under different rotation speed when the surface load on the workbench is constant. But the velocity of the oil film is influenced greatly by the rotation speed. When the rotation speed of the workbench is as quick as enough, the velocity of the oil film on one radial side of the pad will be zero, that is to say the lubrication oil will be drained from the other three sides of the recess.

Numerical Simulation on Velocity Profiles of Mill Bearing Lubrication

2010 ◽  
Vol 145 ◽  
pp. 282-286
Author(s):  
Qing Xue Huang ◽  
Jian Mei Wang ◽  
Yu Gui Li ◽  
Li Feng Ma ◽  
Chun Jiang Zhao
Keyword(s):  
Cross Section ◽  
Velocity Profiles ◽  
Flow State ◽  
Oil Film ◽  
Velocity Gradients ◽  
Oil Flow ◽  
The Mathematical Model ◽  
The Relationship ◽  
General Velocity ◽  
Oil Film Pressure

No 460 oil-film bearing oil as the dedicated lubricant is regarded as the incompressible Newtonian fluid. To comprehensively analyze the real oil flow state, the mathematical model on velocity profiles, together with its dimensionless equations, is established, and the calculating program is developed to simulate the 3D velocity profiles and velocity gradients at different oil flow layers. The relationship between velocity profiles and the oil film pressure is discussed, and the velocity tendency is consistent with the general velocity profile of wedge cross section. The conclusions are beneficial to the further study on lubricating performances of heavy contact components and to prolong their service lives.

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