Influence of the Oil Cavity Depth on Dynamic Pressure Effect of Hydrostatic Thrust Bearing

2009 ◽  
Author(s):  
Junpeng Shao ◽  
Limin Zhou ◽  
Hongmei Li ◽  
Xiaodong Yang ◽  
Yanqin Zhang ◽  
...  
Keyword(s):  
Thrust Bearing ◽  
Pressure Effect ◽  
Dynamic Pressure ◽  
Cavity Depth

scholarly journals Study on dynamic characteristics of gas films of spherical spiral groove hybrid gas bearings

2019 ◽  
Vol 233 (8) ◽  
pp. 1169-1181
Author(s):  
Chenhui Jia ◽  
Haijiang Zhang ◽  
Shijun Guo ◽  
Ming Qiu ◽  
Wensuo Ma ◽  
...  
Keyword(s):  
Pressure Effect ◽  
Dynamic Pressure ◽  
Iteration Algorithm ◽  
Unstable State ◽  
Gas Bearings ◽  
Damping Coefficients ◽  
The Stability ◽  
Stiffness And Damping ◽  
Film Stiffness ◽  
Gas Bearing

According to the gas film force variation law, when the bearing axis is slightly displaced from the static equilibrium position, displacement and velocity disturbance relation expressions for the gas film force increment are constructed. Moreover, combined with the bearing rotor system motion equation, calculation model equations for the gas film stiffness and damping coefficients are established. The axial and radial vibration and velocity of the gas bearings during operation are collected. The instantaneous stiffness and damping coefficients of the gas film are calculated by the rolling iteration algorithm using MATLAB. The dynamic changes in the gas film stiffness and damping under different motion states are analyzed, and the mechanism of the gas film vortex and oscillation is studied. The results demonstrate the following: (1) When the gas bearing is running in the linear steady state in cycle 1, the dynamic pressure effect is enhanced and the stability is improved by increasing the eccentricity; when the gas supply pressure is increased, the static pressure effect is enhanced and the gas film vortex is reduced, but the oscillation is strengthened. (2) With the increase in rotational speed, the gas film vortex force gradually exceeds the gas film damping force, and the stability gradually worsens, causing a fluctuation in the gas film stiffness and damping, following which singularity occurs and a half-speed vortex is formed. Meanwhile, the gas film oscillation is intensified, and the rotor enters the nonlinear stable cycle 2 state operation. (3) As the fluctuation of the film force increases, the instantaneous stiffness and damping oscillation of the film intensifies, most of the stiffness and damping coefficients exhibit distortion, and the rotor operation will enter a chaotic or unstable state. Therefore, the gas bearing stiffness and damping variation characteristics can be used to study and predict the gas bearing operating state. Finally, measures for reducing the vortex and oscillation of the gas film and improving the stability of the gas bearing operation are proposed.

The Analysis and Design of Turbocharger Thrust Bearing

2011 ◽  
Vol 308-310 ◽  
pp. 1333-1336 ◽  
Author(s):  
Li Jun Qiu ◽  
Jia Yang ◽  
Su Ying Xu
Keyword(s):  
High Speed ◽  
Thrust Bearing ◽  
Dynamic Pressure ◽  
Film Structure ◽  
Lubricating Oil ◽  
Axial Position ◽  
Analysis And Design ◽  
Bearing Life ◽  
Bearing Stiffness ◽  
Turbine Shaft

Turbocharger turbine shaft thrust bearing is the role of high-speed rotating turbine to withstand the axial force generated by the turbine shaft and a part of the axial position. Fixed on the intermediate thrust bearing on the two sides and both sides of the ring, respectively, relative sliding. Sliding contact surface produces a condition of dynamic pressure oil film structure and shape of the oil wedge. Bearing the sides of the structural design of the oil wedge slot and forming a design to solve the main content. Bearing thrust bearing stiffness and rotation in the process of stress state and the smooth line is to improve the bearing life. Rotating turbine shaft to ensure the accuracy of key factors. Method of lubricating oil to the oil and oil Xie in the shape and precision bearings to ensure the prerequisite conditions and service life.

Numerical Calculation and Analysis of Dynamic Pressure Effect for Heavy Hydrostatic Bearing Disk with Multiple Oil Pads

2011 ◽  
Vol 4 (8) ◽  
pp. 2561-2565 ◽  
Author(s):  
Junpeng Shao ◽  
Chunxi Dai ◽  
Xiaoqiu Xu ◽  
Yunfei Wang ◽  
Yanqin Zhang ◽  
...  
Keyword(s):  
Numerical Calculation ◽  
Pressure Effect ◽  
Dynamic Pressure ◽  
Hydrostatic Bearing

The Effect of Oil Cavity Depth on Temperature Field in Heavy Hydrostatic Thrust Bearing

2011 ◽  
Vol 23 (5) ◽  
pp. 676-680 ◽  
Author(s):  
Jun-peng Shao ◽  
Chun-xi Dai ◽  
Yan-qin Zhang ◽  
Xiao-dong Yu ◽  
Xiao-qiu Xu ◽  
...  
Keyword(s):  
Temperature Field ◽  
Thrust Bearing ◽  
Cavity Depth

Analysis of the Stiffness and Damping of an Inherently Compensated, Multiple-Inlet, Circular Thrust Bearing

1974 ◽  
Vol 96 (3) ◽  
pp. 329-336 ◽  
Author(s):  
A. K. Stiffler
Keyword(s):  
Reynolds Equation ◽  
Thrust Bearing ◽  
Dynamic Pressure ◽  
External Pressure ◽  
Periodic Load ◽  
Small Perturbations ◽  
Central Disk ◽  
Squeeze Number ◽  
Stiffness And Damping ◽  
Disk Region

A circular thrust bearing with inherently compensated feedholes evenly distributed around an interior radius is analyzed. The feedhole boundary between the central disk region and exterior annular region is modeled as a line source. A periodic load disturbance is imposed on the bearing, and the dynamic pressure distribution is determined by small perturbations of the Reynolds equation. The solution is given in terms of Kelvin functions. Design curves are presented for the stiffness and damping as a function of squeeze number, external pressure, restrictor coefficient and feedhole location.

Three-Dimensional CFD Simulation for Water-Lubricated Guide Bearing of Large Tubular Pump

2014 ◽  
Vol 574 ◽  
pp. 160-166
Author(s):  
Hua Rong Xin ◽  
Ming Yue Zhang
Keyword(s):  
Cfd Simulation ◽  
Pressure Effect ◽  
Load Capacity ◽  
Dynamic Pressure ◽  
Water Pressure ◽  
Three Dimensional ◽  
Water Film ◽  
Static Characteristics ◽  
Pressure Distributions ◽  
High Speeds

A numerical simulation for flow field in water-lubricated guide bearing of large tubular pump is conducted by software Fluent, which shows the pressure distribution of water film with different rotating speeds and the rule of the influence of relevant parameters on the amount of lubricating water, dynamic and static characteristics of guide bearing.The result shows that the pressure distributions of water film at low and high speeds are very different, and with the obvious dynamic pressure effect, the bearing inner can be in a state of reflux and the water-lubricated amount and clearance are reduced. The load capacity and stiffness of guide bearing are increased along with the speed and water pressure increase meanwhile the amount of water is increased along with the speed lowering and the water pressure and clearance increase.

Research on Dynamic Pressure of Hydrostatic Thrust Bearing Under the Different Recess Depth and Rotating Velocity

2014 ◽  
Vol 7 (2) ◽  
pp. 439-446 ◽  
Author(s):  
Xiaodong Yu ◽  
Zhiqiang Wang ◽  
Xiuli Meng ◽  
Huanhuan Li ◽  
Dan Liu ◽  
...  
Keyword(s):  
Thrust Bearing ◽  
Dynamic Pressure

Dynamic pressure effect on horse and horse rider during riding

2014 ◽  
Vol 17 (3) ◽  
pp. 143-150 ◽  
Author(s):  
Graeme Nicol ◽  
Graham P. Arnold ◽  
Weijie Wang ◽  
Rami J. Abboud
Keyword(s):  
Pressure Effect ◽  
Dynamic Pressure

Simulation Research on Temperature Field of Circular Cavity Hydrostatic Thrust Bearing

2009 ◽  
Vol 419-420 ◽  
pp. 141-144 ◽  
Author(s):  
Xiao Dong Yu ◽  
Xiu Li Meng ◽  
Bo Wu ◽  
Jun Peng Shao ◽  
Yan Qin Zhang ◽  
...  
Keyword(s):  
Temperature Field ◽  
Thermal Deformation ◽  
Thrust Bearing ◽  
Three Dimensional ◽  
Circular Cavity ◽  
Cavity Radius ◽  
Distribution Law ◽  
Cavity Depth ◽  
Simulation Research ◽  
Heavy Equipment

In order to solve the thermal deformation of the hydrostatic thrust bearing in the heavy equipment, a simulation research concerning temperature field of multi-pad hydrostatic thrust bearing having circular cavities was described. The Finite Volume Method of Fluent has been used to compute three-dimensional temperature field of gap fluid between the rotation worktable and base. This study theoretically analyzes the influence of cavity radius and cavity depth on the bearing temperature performance according to computational fluid dynamics and lubricating theory. It has revealed its temperature distribution law. The simulation results indicate that an improved characteristic can be gotten from a circular cavity hydrostatic thrust bearing, oil cavity temperature decreases by gradually with cavity radius enhancing, oil cavity temperature decreases by gradually with cavity depth. Through this method, the safety of a hydrostatic thrust bearing having circular cavities multi-pad can be forecasted, and the optimal design of such products can be achieved, so it can provide reasonable data for design and lubrication and experience and thermal deformation computation for hydrostatic thrust bearing in the heavy equipment.

Sign in / Sign up

Export Citation Format

Share Document