Design Principles: Thrust Collar, Shaft Sleeve and Shaft Mounts

[ginsoakedboy]

Howdy folks,

I need to perform the structural design of Thrust Collar and Shaft Sleeve for (hydrodynamic) tilting-pad Thrust and Journal Bearings, respectively. Can someone point me to guidelines / best practices to be followed for the mechanical design of these elements? To be specific, I would like to obtain guidance on the following:

1. How to determine the maximum allowable (elastic) deformation of Thrust Collar surface under thrust load?
2. How to determine the maximum allowable stress in the Thrust Collar due to combined loading?
3. How to determine the minimum contact pressure between the Shaft Sleeve and the Shaft with due consideration to torque (power loss), operating speed, and shaft diameter for Journal Bearing?
4. How to determine the minimum radial cross-section of Shaft Sleeves for a given application?
5. What are the available alternative means to mount Collars and Sleeves on Shafts in applications where reliability, robustness and longevity are important? (Shrink-fits being one of the means.)

"The engineer's first problem in any design situation is to discover what the problem really is."

"A good scientist is a person with original ideas. A good engineer is a person who makes a design that works with as few original ideas as possible."

 

[unclesyd]

Can you post a drawing or sketch of the end of the shaft?
This will clear up any problems with nomenclature.

 

[ginsoakedboy]

unclesyd, I have posted a graphic of the proposed configuration.



"The engineer's first problem in any design situation is to discover what the problem really is."

"A good scientist is a person with original ideas. A good engineer is a person who makes a design that works with as few original ideas as possible."

 

[ginsoakedboy]

Also, a follow-up question:

Most people (as evident by the literature) are concerned about the distortion of the Thrust Pads, but not the "coning" or "bowing" of the Thrust Collar. A simple FE analysis shows that the Thrust Collar deformation under bearing load is many-fold compared to film thickness. Why is this not a considered to be an issue?