Author: Josiah Doss Knight
Publisher:
ISBN:
Category : Bearings (Machinery)
Languages : en
Pages : 310
Book Description
Non-adiabatic Thermal Effects in Tilting Pad and Multilobe Journal Bearings
Author: Josiah Doss Knight
Publisher:
ISBN:
Category : Bearings (Machinery)
Languages : en
Pages : 310
Book Description
Publisher:
ISBN:
Category : Bearings (Machinery)
Languages : en
Pages : 310
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 942
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 942
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 936
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 936
Book Description
Tilted Pad Journal Bearings: The Effects of Input Uncertainty on THPAD Temperature Predictions
Author: Michael Witt
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The Shock and Vibration Digest
Author:
Publisher:
ISBN:
Category : Shock (Mechanics)
Languages : en
Pages : 442
Book Description
Publisher:
ISBN:
Category : Shock (Mechanics)
Languages : en
Pages : 442
Book Description
Dissertation Abstracts International
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 734
Book Description
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 734
Book Description
A Novel Computational Model for Tilting Pad Journal Bearings with Soft Pivot Stiffnesses
Author: Yujiao Tao
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A novel tilting pad journal bearing model including pivot flexibility as well as temporal fluid inertia effects on the thin film fluid flow aims to accurately predict the bearing forced performance. The predictive model also accounts for the thermal energy transport effects in a TPJB. A Fortran program with an Excel GUI models TPJBs and delivers predictions of the bearing static and dynamic forced performance. The calculation algorithm uses a Newton-Raphson procedure for successful iterations on the equilibrium pad radial and transverse displacements and journal center displacements, even for bearings pads with very soft pivots. The predictive model accounts for the effect of film temperature on the operating bearing and pad clearances by calculating the thermal expansion of the journal and pad surfaces. The pad inlet thermal mixing coefficient (lambda) influences moderately the predicted fluid film temperature field. Pad pivot flexibility decreases significantly and dominates the bearing stiffness and damping coefficients when the pivot stiffness is lower than 10% of the fluid film stiffness coefficients (with rigid pivots). Pivot flexibility has a more pronounced effect on reducing the bearing damping coefficients than the stiffness coefficients. Pad pivot flexibility may still affect the bearing behavior at a light load condition for a bearing with a large pad preload. Pad pivot flexibility, as well as the fluid inertia and the pads' mass and mass moment of inertia, could influence the bearing impedance coefficients, in particular at high whirl frequencies. The stiffness and damping coefficients of a TPJB increase with a reduction in the operating bearing and pad clearances. The work delivers a predictive tool benchmarked against a number of experimental results for test bearings available in the recent literature. The static and dynamic forced performance characteristics of actual TPJBs can not be accurately predicted unless their pad flexibility and pivot flexibility, fluid film temperature, pad inlet thermal mixing coefficient, operating bearing and pad clearances, among others are well known in advance. However, the extensive archival literature showcasing test procedures and experimental results for TPJBs does not report the above parameters. Thus, reasonable assumptions on the magnitude of certain elusive parameters for use in the predictive TPJB model are necessary. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/148299
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A novel tilting pad journal bearing model including pivot flexibility as well as temporal fluid inertia effects on the thin film fluid flow aims to accurately predict the bearing forced performance. The predictive model also accounts for the thermal energy transport effects in a TPJB. A Fortran program with an Excel GUI models TPJBs and delivers predictions of the bearing static and dynamic forced performance. The calculation algorithm uses a Newton-Raphson procedure for successful iterations on the equilibrium pad radial and transverse displacements and journal center displacements, even for bearings pads with very soft pivots. The predictive model accounts for the effect of film temperature on the operating bearing and pad clearances by calculating the thermal expansion of the journal and pad surfaces. The pad inlet thermal mixing coefficient (lambda) influences moderately the predicted fluid film temperature field. Pad pivot flexibility decreases significantly and dominates the bearing stiffness and damping coefficients when the pivot stiffness is lower than 10% of the fluid film stiffness coefficients (with rigid pivots). Pivot flexibility has a more pronounced effect on reducing the bearing damping coefficients than the stiffness coefficients. Pad pivot flexibility may still affect the bearing behavior at a light load condition for a bearing with a large pad preload. Pad pivot flexibility, as well as the fluid inertia and the pads' mass and mass moment of inertia, could influence the bearing impedance coefficients, in particular at high whirl frequencies. The stiffness and damping coefficients of a TPJB increase with a reduction in the operating bearing and pad clearances. The work delivers a predictive tool benchmarked against a number of experimental results for test bearings available in the recent literature. The static and dynamic forced performance characteristics of actual TPJBs can not be accurately predicted unless their pad flexibility and pivot flexibility, fluid film temperature, pad inlet thermal mixing coefficient, operating bearing and pad clearances, among others are well known in advance. However, the extensive archival literature showcasing test procedures and experimental results for TPJBs does not report the above parameters. Thus, reasonable assumptions on the magnitude of certain elusive parameters for use in the predictive TPJB model are necessary. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/148299
Design Guide for Gas-lubricated Tilting-pad Journal and Thrust Bearings with Special Reference to High-speed Rotor
Author: Edgar J. Gunter
Publisher:
ISBN:
Category : Gas-lubricated journal bearings
Languages : en
Pages : 236
Book Description
Publisher:
ISBN:
Category : Gas-lubricated journal bearings
Languages : en
Pages : 236
Book Description
THERMAL EFFECTS IN JOURNAL BEARINGS..
Author: Elsayed Morsi Aly Afify
Publisher:
ISBN:
Category : Bearings (Machinery)
Languages : en
Pages : 152
Book Description
Publisher:
ISBN:
Category : Bearings (Machinery)
Languages : en
Pages : 152
Book Description
Thermal Analysis of Fixed and Tilting Pad Journal Bearings Including Cross-film Viscosity Variations and Deformations
Author: Branagan Lyle Arthur
Publisher:
ISBN:
Category : Journal bearings
Languages : en
Pages : 726
Book Description
Publisher:
ISBN:
Category : Journal bearings
Languages : en
Pages : 726
Book Description