Reliability of roller bearing in pumps

Chye, Qua Toong (2005). Reliability of roller bearing in pumps B.Sc Thesis, School of Engineering, The University of Queensland.

       
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Author Chye, Qua Toong
Thesis Title Reliability of roller bearing in pumps
School, Centre or Institute School of Engineering
Institution The University of Queensland
Publication date 2005
Thesis type B.Sc Thesis
Supervisor Dr Martin Veidt
Total pages 67
Language eng
Subjects 290501 Mechanical Engineering
Formatted abstract

This thesis aims to review the reliability of hybrid ceramic bearings especially for pumps. Therefore, the reliability of hybrid ceramic bearings is compared to the commonly used steel bearings that are present in most machinery. The reliability of hybrid ceramic bearings, in terms of lifetime of the bearings and capability of the bearing to function under harsh operating conditions are discussed. It was found that hybrid ceramic bearings are typically 5 to 10 times more lasting than steel bearings. This is due to the properties of silicon nitride that contributes to the unique advantages it has over conventional steels. The use of hybrid ceramic bearings in pumps eliminate the possibility of electrical disturbances in the raceway like electrical pitting as ceramic is non-conductive to electricity, and allows the bearings to operate at a higher speed and maximum service temperature of about 800oC, or under a corrosive environment. This enables the bearings to perform at a higher degree of accuracy. The wear rate of hybrid ceramic bearings is about 7.14% that of the steel bearings as the rotation of the hybrid bearings generate little friction as compared to the steel bearings. Another important feature of the hybrid bearing is that the hardness of ceramic is twice that of steel, amounting to 1400-1700 on the Vicker’s Hardness scale. Therefore, the hybrid ceramic design is able to hold its shape better than the steel design. With all the mentioned advantages hybrid ceramic bearings have over steel bearings, it is only a matter of time before hybrid ceramic bearings replaces the conventional steel bearings.

Keyword Pumps
Hybrid ceramic bearings -- Reliability
Additional Notes * Mechanical engineering undergraduate theses. Sem 2, 2005

Document type: Thesis
Collection: UQ Theses (non-RHD) - UQ staff and students only
 
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