Design of the Hydrostatic Thrust Spherical Bearing with Restrictors (Fitted Type)

Ahmad Waguih Yacout Elescandarany

doi:doi:10.11648/j.ijmea.20190702.11

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Design of the Hydrostatic Thrust Spherical Bearing with Restrictors (Fitted Type)

Ahmad Waguih Yacout Elescandarany

Published in International Journal of Mechanical Engineering and Applications (Volume 7, Issue 2)

Received: 1 March 2019 Accepted: 26 April 2019 Published: 29 May 2019

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Abstract

The hydrostatic bearings are broadly observed in industrial applications owing to their potential characteristics of low running friction, high load-carrying capacity, high stiffness and small viscous dissipation. Spherical bearings have advantages over other configurations of bearings because of their self-aligning property and also their capacity to accept both radial and thrust loads. Operation of the spherical bearings is unaffected by angular miss-alignment. They are mainly used in machine tools, precision measuring instruments, hydraulic piston pumps and motors, gyroscope gimbals, telescopes, radar tracking units, air craft engines and rotary drum of centrifugal separator for enriched uranium. The main objective of this part of study is to handle the fitted bearing design taking into consideration the combined effects of rotational inertia, surface roughness and the fluid film viscosity variability. The mathematical expressions derived in part 2 for this type of bearings with its different configurations (with and without recess; hemispherical and partial hemispherical seats) have been used in the detailed bearing design. Improving the previous design through developing some mathematical expressions, a new conception is adopted to reveal the bearing consistency showing how the fluid flow rate pulsation or intermittent could be prevented. The detailed design procedures show the advantages of this method to get the central pressure ratio mathematically through maximizing the flow rate with minimizing the supply pressure which means minimum pump power to get maximum discharge. This design showed very high mean static stiffness of all the bearing configurations and an acceptable temperature rise for a heavy duty bearing without the need to a use a cooling system.

Published in	International Journal of Mechanical Engineering and Applications (Volume 7, Issue 2)
DOI	10.11648/j.ijmea.20190702.11
Page(s)	34-45
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2019. Published by Science Publishing Group

Keywords

Hydrostatic Bearings, Spherical Bearings Design, Surface Roughness, Inertia, Viscosity Effects

References

[1]	Dowson D. and Taylor M. Fluid inertia effect in spherical hydrostatic thrust bearings. ASLE Trans. 1967, 10, 316- 324.
[2]	Rowe W. B. and Stout K. J. Design data and a manufacturing technique for spherical hydrostatic bearings in machine tool applications, Int. J. Mach. Tool Des. Res. 1971, Vol. 11, pp. 293-307.
[3]	Cheng and W. B. Rowe, 'A selection strategy for the design of externally pressurized journal bearings', Tribology International, vol. 28, no. 7, pp. 465-474, 1995.
[4]	Shijiang Yuan and Decheng Zhou, "Design procedure of an advanced spherical hydrostatic bearing used in rotary forging press", The International Journal of Machine tools and manufacture 1997, Vol. 37, No. 5, pp. 649-656.
[5]	Toshiharu Kazama," Optimum design of hydrostatic spherical bearing in fluid film lubrication", Transactions of ASME 2000, Vol. 122, pp. 866-869.
[6]	Sharma SC, Jain SC and Bharuka DK. "Influence of Recess Shape on the Performance of a Capillary Compensated Circular Thrust Pad Hydrostatic Bearing", Tribology International 2002 Vol. 35, pp. 347-365.
[7]	Singh N, Sharma SC, Jain SC, Reddy SS. "Performance of membrane compensated multi-recess hydrostatic/hybrid flexible journal bearing system considering various recess shapes", Tribology International 2004, Vol. pp. 11-24.
[8]	J. R. Lin, Ch. F. Chiang, "Effect of surface roughness and rotational inertia on the optimal stiffness of hydrostatic thrust bearings", International journal of applies mechanics and engineering. 2002, Vol.7, No. 4, pp: 1247- 1261.
[9]	Ahmad W. Yacout, Ashraf S. Ismaeel, Sadek Z. Kassab, "The combined effects of the centripetal inertia and the surface roughness on the hydrostatic thrust spherical bearing performance", Tribolgy International Journal 2007, Vol.40, No. 3, 522-532.
[10]	Lu Lihua, Su Hao, Liang Yingchun, Zhang Qiang," Research on Static Stiffness of Hydrostatic Bearing using Fluid-Structure Interaction Analysis", Procedia Engineering 2012, 29, 1304 – 1308.
[11]	Ahmad W. Y. Elescandarany, “The Effect of the fluid film variable viscosity on the hydrostatic thrust spherical bearing performance in the presence of centripetal inertia and surface roughness (Part 1 Un-recessed fitted bearing)”, The International Journal of Mechanical Engineering and Applications2018,Vol.6, No. 1, pp. 1-12.
[12]	Ahmad W. Y. Elescandarany, “The Effect of the fluid film variable viscosity on the hydrostatic thrust spherical bearing performance in the presence of centripetal inertia and surface roughness (Part2 Recessed fitted bearing)”, The International Journal of Mechanical Engineering and Applications2018, Vol.6, No. 3, pp. 73-90.

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Ahmad Waguih Yacout Elescandarany. (2019). Design of the Hydrostatic Thrust Spherical Bearing with Restrictors (Fitted Type). International Journal of Mechanical Engineering and Applications, 7(2), 34-45. https://doi.org/10.11648/j.ijmea.20190702.11

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ACS Style

Ahmad Waguih Yacout Elescandarany. Design of the Hydrostatic Thrust Spherical Bearing with Restrictors (Fitted Type). Int. J. Mech. Eng. Appl. 2019, 7(2), 34-45. doi: 10.11648/j.ijmea.20190702.11

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AMA Style

Ahmad Waguih Yacout Elescandarany. Design of the Hydrostatic Thrust Spherical Bearing with Restrictors (Fitted Type). Int J Mech Eng Appl. 2019;7(2):34-45. doi: 10.11648/j.ijmea.20190702.11

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@article{10.11648/j.ijmea.20190702.11,
  author = {Ahmad Waguih Yacout Elescandarany},
  title = {Design of the Hydrostatic Thrust Spherical Bearing with Restrictors (Fitted Type)},
  journal = {International Journal of Mechanical Engineering and Applications},
  volume = {7},
  number = {2},
  pages = {34-45},
  doi = {10.11648/j.ijmea.20190702.11},
  url = {https://doi.org/10.11648/j.ijmea.20190702.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmea.20190702.11},
  abstract = {The hydrostatic bearings are broadly observed in industrial applications owing to their potential characteristics of low running friction, high load-carrying capacity, high stiffness and small viscous dissipation. Spherical bearings have advantages over other configurations of bearings because of their self-aligning property and also their capacity to accept both radial and thrust loads. Operation of the spherical bearings is unaffected by angular miss-alignment. They are mainly used in machine tools, precision measuring instruments, hydraulic piston pumps and motors, gyroscope gimbals, telescopes, radar tracking units, air craft engines and rotary drum of centrifugal separator for enriched uranium. The main objective of this part of study is to handle the fitted bearing design taking into consideration the combined effects of rotational inertia, surface roughness and the fluid film viscosity variability. The mathematical expressions derived in part 2 for this type of bearings with its different configurations (with and without recess; hemispherical and partial hemispherical seats) have been used in the detailed bearing design. Improving the previous design through developing some mathematical expressions, a new conception is adopted to reveal the bearing consistency showing how the fluid flow rate pulsation or intermittent could be prevented. The detailed design procedures show the advantages of this method to get the central pressure ratio mathematically through maximizing the flow rate with minimizing the supply pressure which means minimum pump power to get maximum discharge. This design showed very high mean static stiffness of all the bearing configurations and an acceptable temperature rise for a heavy duty bearing without the need to a use a cooling system.},
 year = {2019}
}

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TY  - JOUR
T1  - Design of the Hydrostatic Thrust Spherical Bearing with Restrictors (Fitted Type)
AU  - Ahmad Waguih Yacout Elescandarany
Y1  - 2019/05/29
PY  - 2019
N1  - https://doi.org/10.11648/j.ijmea.20190702.11
DO  - 10.11648/j.ijmea.20190702.11
T2  - International Journal of Mechanical Engineering and Applications
JF  - International Journal of Mechanical Engineering and Applications
JO  - International Journal of Mechanical Engineering and Applications
SP  - 34
EP  - 45
PB  - Science Publishing Group
SN  - 2330-0248
UR  - https://doi.org/10.11648/j.ijmea.20190702.11
AB  - The hydrostatic bearings are broadly observed in industrial applications owing to their potential characteristics of low running friction, high load-carrying capacity, high stiffness and small viscous dissipation. Spherical bearings have advantages over other configurations of bearings because of their self-aligning property and also their capacity to accept both radial and thrust loads. Operation of the spherical bearings is unaffected by angular miss-alignment. They are mainly used in machine tools, precision measuring instruments, hydraulic piston pumps and motors, gyroscope gimbals, telescopes, radar tracking units, air craft engines and rotary drum of centrifugal separator for enriched uranium. The main objective of this part of study is to handle the fitted bearing design taking into consideration the combined effects of rotational inertia, surface roughness and the fluid film viscosity variability. The mathematical expressions derived in part 2 for this type of bearings with its different configurations (with and without recess; hemispherical and partial hemispherical seats) have been used in the detailed bearing design. Improving the previous design through developing some mathematical expressions, a new conception is adopted to reveal the bearing consistency showing how the fluid flow rate pulsation or intermittent could be prevented. The detailed design procedures show the advantages of this method to get the central pressure ratio mathematically through maximizing the flow rate with minimizing the supply pressure which means minimum pump power to get maximum discharge. This design showed very high mean static stiffness of all the bearing configurations and an acceptable temperature rise for a heavy duty bearing without the need to a use a cooling system.
VL  - 7
IS  - 2
ER  -

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Author Information

Ahmad Waguih Yacout Elescandarany

Mechanical Department, Faculty of Engineering, Alexandria University, Alex, Egypt

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Plain Text BibTeX RIS

APA Style

Ahmad Waguih Yacout Elescandarany. (2019). Design of the Hydrostatic Thrust Spherical Bearing with Restrictors (Fitted Type). International Journal of Mechanical Engineering and Applications, 7(2), 34-45. https://doi.org/10.11648/j.ijmea.20190702.11

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ACS Style

Ahmad Waguih Yacout Elescandarany. Design of the Hydrostatic Thrust Spherical Bearing with Restrictors (Fitted Type). Int. J. Mech. Eng. Appl. 2019, 7(2), 34-45. doi: 10.11648/j.ijmea.20190702.11

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AMA Style

Ahmad Waguih Yacout Elescandarany. Design of the Hydrostatic Thrust Spherical Bearing with Restrictors (Fitted Type). Int J Mech Eng Appl. 2019;7(2):34-45. doi: 10.11648/j.ijmea.20190702.11

Copy | Download

@article{10.11648/j.ijmea.20190702.11,
  author = {Ahmad Waguih Yacout Elescandarany},
  title = {Design of the Hydrostatic Thrust Spherical Bearing with Restrictors (Fitted Type)},
  journal = {International Journal of Mechanical Engineering and Applications},
  volume = {7},
  number = {2},
  pages = {34-45},
  doi = {10.11648/j.ijmea.20190702.11},
  url = {https://doi.org/10.11648/j.ijmea.20190702.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmea.20190702.11},
  abstract = {The hydrostatic bearings are broadly observed in industrial applications owing to their potential characteristics of low running friction, high load-carrying capacity, high stiffness and small viscous dissipation. Spherical bearings have advantages over other configurations of bearings because of their self-aligning property and also their capacity to accept both radial and thrust loads. Operation of the spherical bearings is unaffected by angular miss-alignment. They are mainly used in machine tools, precision measuring instruments, hydraulic piston pumps and motors, gyroscope gimbals, telescopes, radar tracking units, air craft engines and rotary drum of centrifugal separator for enriched uranium. The main objective of this part of study is to handle the fitted bearing design taking into consideration the combined effects of rotational inertia, surface roughness and the fluid film viscosity variability. The mathematical expressions derived in part 2 for this type of bearings with its different configurations (with and without recess; hemispherical and partial hemispherical seats) have been used in the detailed bearing design. Improving the previous design through developing some mathematical expressions, a new conception is adopted to reveal the bearing consistency showing how the fluid flow rate pulsation or intermittent could be prevented. The detailed design procedures show the advantages of this method to get the central pressure ratio mathematically through maximizing the flow rate with minimizing the supply pressure which means minimum pump power to get maximum discharge. This design showed very high mean static stiffness of all the bearing configurations and an acceptable temperature rise for a heavy duty bearing without the need to a use a cooling system.},
 year = {2019}
}

Copy | Download

TY  - JOUR
T1  - Design of the Hydrostatic Thrust Spherical Bearing with Restrictors (Fitted Type)
AU  - Ahmad Waguih Yacout Elescandarany
Y1  - 2019/05/29
PY  - 2019
N1  - https://doi.org/10.11648/j.ijmea.20190702.11
DO  - 10.11648/j.ijmea.20190702.11
T2  - International Journal of Mechanical Engineering and Applications
JF  - International Journal of Mechanical Engineering and Applications
JO  - International Journal of Mechanical Engineering and Applications
SP  - 34
EP  - 45
PB  - Science Publishing Group
SN  - 2330-0248
UR  - https://doi.org/10.11648/j.ijmea.20190702.11
AB  - The hydrostatic bearings are broadly observed in industrial applications owing to their potential characteristics of low running friction, high load-carrying capacity, high stiffness and small viscous dissipation. Spherical bearings have advantages over other configurations of bearings because of their self-aligning property and also their capacity to accept both radial and thrust loads. Operation of the spherical bearings is unaffected by angular miss-alignment. They are mainly used in machine tools, precision measuring instruments, hydraulic piston pumps and motors, gyroscope gimbals, telescopes, radar tracking units, air craft engines and rotary drum of centrifugal separator for enriched uranium. The main objective of this part of study is to handle the fitted bearing design taking into consideration the combined effects of rotational inertia, surface roughness and the fluid film viscosity variability. The mathematical expressions derived in part 2 for this type of bearings with its different configurations (with and without recess; hemispherical and partial hemispherical seats) have been used in the detailed bearing design. Improving the previous design through developing some mathematical expressions, a new conception is adopted to reveal the bearing consistency showing how the fluid flow rate pulsation or intermittent could be prevented. The detailed design procedures show the advantages of this method to get the central pressure ratio mathematically through maximizing the flow rate with minimizing the supply pressure which means minimum pump power to get maximum discharge. This design showed very high mean static stiffness of all the bearing configurations and an acceptable temperature rise for a heavy duty bearing without the need to a use a cooling system.
VL  - 7
IS  - 2
ER  -

Copy | Download