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.

Research on Temperature Field of Hydrostatic Thrust Bearing with Annular Cavity Multi-Pad

2011 ◽  
Vol 121-126 ◽  
pp. 3477-3481
Author(s):  
Xiao Dong Yu ◽  
Xiu Li Meng ◽  
Bo Wu ◽  
Chun Li Gao ◽  
Zhi Xin Qiu ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Temperature Field ◽  
Thermal Deformation ◽  
Thrust Bearing ◽  
Three Dimensional ◽  
Distribution Law ◽  
Simulation Research ◽  
Temperature Performance ◽  
Simulation Results ◽  
Volume Method

A simulation research concerning temperature field of hydrostatic thrust bearing having annular cavities multi-pad was described in order to solve the thermal deformation of the hydrostatic thrust bearing with annular cavity multi-pad in the heavy CNC equipment. The Finite Volume Method of CFX 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 rotating velocity 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 will be affected by rotating velocity easily, and oil cavity temperature increases by gradually with rotating velocity enhancing. Through this method, the safety of a hydrostatic thrust bearing having annular cavities multi-pad can be forecasted, and the optimal design of such products can be achieved, so it can provide reasonable data for design, lubrication, experience and thermal deformation computation for hydrostatic thrust bearing in the heavy CNC equipment.

Simulation on Temperature Field of Gap Oil Film in Constant Flow Hydrostatic Center Frame

2011 ◽  
Vol 121-126 ◽  
pp. 4706-4710
Author(s):  
Yong Hai Li ◽  
Xiu Li Meng ◽  
Xiao Dong Yu ◽  
Bo Wu ◽  
Chun Li Gao ◽  
...  
Keyword(s):  
Temperature Field ◽  
Angular Velocity ◽  
Thermal Deformation ◽  
Three Dimensional ◽  
Constant Flow ◽  
Distribution Law ◽  
Simulation Research ◽  
Oil Film ◽  
Temperature Performance ◽  
Volume Method

In order to solve the thermal deformation of the hydrostatic center frame in the heavy type horizontal lathe, a simulation research concerning temperature field of hydrostatic center frame is described. The Finite Volume Method of CFX has been used to compute three-dimensional temperature field of gap fluid between workpiece and bearing pillow. This research theoretically analyzes the influence of angular velocity on the bearing temperature performance according to lubricating theory and computational fluid dynamics, and it has revealed its temperature distribution law of gap oil film. Results indicate that an improved characteristic will be affected by angular velocity easily, and oil cavity temperature increases by gradually with angular velocity enhancing. Through this method, the safety of a hydrostatic center frame can be forecasted, and the optimal design of such products can be achieved, so it can provide reasonable data for design, lubrication, experience and thermal deformation computation for hydrostatic center frame in the heavy type horizontal lathe.

Influence Research of Recess Shape on Dynamic Effect of Hydrostatic Thrust Bearing

2013 ◽  
Vol 274 ◽  
pp. 57-60
Author(s):  
Xiao Dong Yu ◽  
Zhen Guo Li ◽  
De Fan Zhou ◽  
Heng Wei Li ◽  
Chun Li Gao ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Thermal Deformation ◽  
Thrust Bearing ◽  
Pressure Field ◽  
Three Dimensional ◽  
Dynamic Effect ◽  
Loading Capacity ◽  
Simulation Research ◽  
Simulation Results ◽  
Volume Method

This work describes a simulation research concerning dynamic effect of multi-pad hydrostatic thrust bearing having rectangular recess, sector recess, ellipse recess and I-shaped recess in order to solve the loading capacity of the hydrostatic thrust bearing. Three-dimensional pressure field of gap fluid between the rotation worktable and the base has been computed by using the Finite Volume Method. This study theoretically analyzes the influence of recess shape on dynamic effect of the bearing according to computational fluid dynamics and lubricating theory, and the simulation results indicate that an improved characteristic will be affected by recess shape easily. Through this method, the safety of a multi-pad hydrostatic thrust bearing having different cavities can be forecasted, and the optimal loading capacity of such products can be achieved, so it can provide reasonable data for design, lubrication, experience and thermal deformation computation for hydrostatic thrust bearing.

Contrastive Analysis on Thermal Deformation of Thrust Bearing Pad with Two Kind of Supporting

2014 ◽  
Vol 494-495 ◽  
pp. 554-557
Author(s):  
Yong Hai Li ◽  
Shi Bo Liu ◽  
Rong Kui Yao ◽  
Jian Wang ◽  
Ning Yang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Temperature Field ◽  
Thermal Deformation ◽  
Thrust Bearing ◽  
Deformation Field ◽  
Contrastive Analysis ◽  
Tilting Pad ◽  
Finite Element Numerical Simulation ◽  
Point Line

In order to solve thermal deformation, the finite element numerical simulation of two kind of tilting pad thrust bearing is made for the same pad surface, and thermal deformation is made to analyze comparatively. The results show that the temperature field, the deformation field and the values of pad are similar for two different supported thrust bearing (point, line support) under the same operating condition. The pad temperature and deformation will increase with the increasing of pv values. According to the calculation conditions, the temperature field rose about 1°C, and the thermal deflection increased 0.002mm with pv value increased by 10%.

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

scholarly journals Calculation and Analysis of Rotor Thermal Static Field for Inter-Turn Short Circuit of Large Hydro-Generator Excitation Winding

Energies ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1252
Author(s):  
Junqing Li ◽  
Luo Wang
Keyword(s):  
Temperature Field ◽  
Thermal Stress ◽  
Thermal Deformation ◽  
Short Circuit ◽  
Three Dimensional ◽  
Static Field ◽  
Heat Transfer Theory ◽  
Circuit Fault Diagnosis ◽  
Rotor Winding ◽  
Magnetic Poles

Rotor winding inter-turn short circuit a common fault in hydro-generators. This fault would change the temperature, stress, and other thermal fields of a rotor and threaten the safe operation of the generator. In this paper, the Three Gorges hydro-generator is taken as an example. Mathematical models of three-dimensional temperature field and thermal stress field of rotor magnetic poles are established based on heat transfer theory and solved by finite element method. The temperature field, thermal deformation, and thermal stress distribution of magnetic poles in rotor winding inter-turn short circuit are calculated. On the basis of the calculation, the effects of the different turn numbers and positions of short circuit on the temperature, thermal deformation, and thermal stress of rotor magnetic poles are further studied. It is concluded that the thermal stress of the winding adjacent to the shorted turn would decrease, the thermal stress of the winding farther away from the shorted winding would increase, and so on. The results of this paper can provide references for inter-turn short circuit fault diagnosis and lay a foundation for the further studies of related faults.

Simulation on Pressure Field of Gap Oil Film in Constant Flow Hydrostatic Center Frame

2013 ◽  
Vol 427-429 ◽  
pp. 289-292
Author(s):  
Xiao Dong Yu ◽  
Hong Ying Li ◽  
Xiu Li Meng ◽  
Li Tan ◽  
Zhi Qiang Wang ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Pressure Field ◽  
Three Dimensional ◽  
Constant Flow ◽  
Cavity Pressure ◽  
Distribution Law ◽  
Simulation Research ◽  
Oil Film ◽  
Simulation Results ◽  
Volume Method

In order to solve the force deformation of the hydrostatic center frame in the heavy type horizontal lathe, a simulation research concerning pressure field of hydrostatic center frame was described. The Finite Volume Method of CFX has been used to compute three-dimensional pressure field of gap fluid between the rotation workpiece and bearing pillow. This research theoretically analyzes the influence of angular velocity on the bearing pressure performance according to lubricating theory and computational fluid dynamics, and it has revealed its pressure distribution law of gap oil film. The simulation results indicate that an improved characteristic will be affected by rotating velocity easily, and oil cavity pressure creases by gradually with rotating velocity enhancing. Through this method, it can provide reasonable data for design, lubrication, experience and force deformation computation for hydrostatic center frame in the heavy type horizontal lathe.

Sensitivity Studies for the Shallow-Pocket Geometry of a Hydrostatic Thrust Bearing

2003 ◽  
Author(s):  
Robert E. Johnson ◽  
Noah D. Manring
Keyword(s):  
Closed Form ◽  
Thrust Bearing ◽  
Three Dimensional ◽  
Closed Form Expression ◽  
Pocket Depth ◽  
Thrust Bearings ◽  
Heavy Equipment ◽  
Load Carrying ◽  
Sensitivity Studies ◽  
Basic Features

Hydrostatic thrust bearings have been the object of considerable research for many years. The attention that these bearings have received is primarily due to the important role they play in the design and operation of heavy equipment. In this role, the hydrostatic thrust bearing is often considered to be the “Achilles heel” of the total machine system as failures result in catastrophic difficulties and expensive repairs. The objectives of this research are to examine the nuances of designing a hydorstatic thrust bearing using a shallow pocket as opposed to the more traditional deep pocket design. By using a two-dimensional model for this geometry, the basic features of the shallow pocket design are extracted in closed-form and behaviors that would be expected in the three-dimensional setting are identified. In this research, a single dimensionless parameter is used to describe the influence of the bearing speed under laminar flow conditions. The principal results of this research are closed-form expression that describe the load carrying capcity of the bearing, the tilting moment exerted on the bearing by a skewed pressure distribution, and the volumetric leakage of the bearing. Sensitivity studies are conducted using these results and the influence of small perturbations of the pocket depth are identified for bearings with different pocket widths. These results are discussed and conclusions are itemized in the final section of the paper.

Research on Velocity Influence on Thermal Deformation Field of Heavy Hydrostatic Thrust Bearing

2010 ◽  
Vol 129-131 ◽  
pp. 968-972
Author(s):  
Xiao Dong Yang ◽  
Jun Peng Shao ◽  
Xiao Qiu Xu ◽  
Yun Fei Wang ◽  
Chao Yin ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Theoretical Basis ◽  
Thermal Deformation ◽  
Thrust Bearing ◽  
Structure Design ◽  
Shape Deformation ◽  
Hydrostatic Bearing ◽  
Deformation Problem ◽  
Heavy Equipment ◽  
Wedge Shape

According to the structure of workbench and base of heavy hydrostatic bearing which is applied in heavy equipment, thermal deformation equations of the structure are deduced and boundary conditions for numerical simulation are established based on thermal elasticity theory. Then thermal deformation of hydrostatic bearing without load is calculated at different velocity. The results indicate that: temperature and velocity impacts a significant influence on thermal deformation of hydrostatic bearing. Thermal deformation increases as the velocity increases; workbench up-warps severely, oil-pad inclines towards outside to a certain extent, which results in the lubrication clearance emerges as wedge-shape deformation. The conclusions from thermal deformation calculation could provide theoretical basis for structure design of hydrostatic bearing and ravel out the thermal deformation problem.

Design and performance analysis on heat pipe hydrostatic thrust bearings based on rectangular oil pad

2018 ◽  
Vol 70 (7) ◽  
pp. 1251-1257
Author(s):  
Xibing Li ◽  
Weixiang Li ◽  
Xueyong Chen ◽  
Ming Li ◽  
Huayun Chen ◽  
...  
Keyword(s):  
Temperature Field ◽  
Heat Pipe ◽  
Temperature Rise ◽  
Dry Friction ◽  
Thermal Deformation ◽  
Thrust Bearing ◽  
Processing Quality ◽  
Content Type ◽  
Thrust Bearings

Purpose The purpose of this paper is to examine the effect of application of a heat pipe in an aspect of hydrostatic thrust bearings on thermal balance and deformation and the role of this application in increasing the rotating speed of a workbench. Design/methodology/approach Numerical simulations of oil film temperature field, the temperature field and thermal deformation of the bearing’s workbench and base were performed by finite element analysis (FEA) software for both the traditional hydrostatic thrust bearings and the heat pipe ones. Findings Oil pad and workbench of the hydrostatic thrust bearings are fabricated with a heat pipe cooling structure, which can take away most of the heat generated by shearing of the oil film, control the temperature rise and thermal deformation of the hydrostatic thrust bearing effectively, avoid the dry friction phenomenon and finally improve the processing quality of equipment. Originality/value The heat pipe hydrostatic thrust bearings could control the temperature rise and thermal deformation of the hydrostatic thrust bearing effectively, avoid the dry friction phenomenon and improve the processing quality of equipment.

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