Bearing design

E. N. Bamberger, Bearing Design—Historical Aspects, Present Technology and Future Problems, American Society of Mechanical Engineers, New York, 1980, pp. 1-45. 

The choice of a turboexpander load may be influenced by the desire to optimize refrigeration. In other words, a dynamometer load may be chosen over a generator load due to speed considerations. Additionally, there are other constraints imposed on optimal design. Factors such as impeller peripheral velocity (tip speed), bearing design, axial load balance, material selection, and manufacturing methods (which have greatly improved in the recent decades) all have an influence. 

Bearing designs are also affeeted by the transition of the film from a laminar to a turbulent region. The transition speed Nt) ean be eomputed using the following relationship ... 

Herbage, B.S., High Speed Journal and Thrust Bearing Design, Proceedings of the 1st. Turbomachinery Symposium, Texas A M University, October 1972, pp. 56-61. 

Feopard, A.J., Principles of Fluid Film Bearing Design and Application, Proceedings of the 6th Turbomachinery Symposium, Texas A M University, December 1977, pp. 207-230. 

Salamone, D.J., Journal Bearing Design Types and Their Applications to Turbomachinery, Proceedings of the 13th Turbomachinery Symposium, Texas A M University, p. 179, 1984. 

Perform meehanieal designs (e.g., to obtain shaft diameter, supports, bearing designs, ete.). 

The maximum speed for these machines ranges from 500-4,000 rpm, depending upon bearing design and unit size. For comparison selections refer to Huffr and Patton. ... 

Classification of Drilling Bits 769. Roller Rock Bit 771. Bearing Design 774. Tooth Design 776. 

Features. Seven categories of bearing design and gauge protection are defined as features. Features 8 and 9 are reserved for future use. 

Figure 4-140. Roller cone bit bearings design [44], (Courtesy SPE.)...

Always select the best bearing design for the application and not the cheapest. The cost of the original bearing is usually small by comparison to the costs of replacement components and the down-time in production when premature bearing failure occurs because an inappropriate bearing was used. 

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