Volume No. 7 Issue No.: 1A Page No.: 346-353 July-September 2012

 

ANALYSIS OF STATIC AND DYNAMIC LOAD ON HYDROSTATIC BEARING WITH VARIABLE VISCOSITY AFFECTED BY THE ENVIRONMENTAL TEMPERATURE

 

Srinivasan V.

School of Mechanical Engineering, Bharath University, Chennai, (INDIA)

 

Received on : May 05, 2012

 

ABSTRACT

 

Hydrostatic bearing find wide application in machine tools with various technology because of their high stiffness and damping characteristic. With the advantage of new cutting materials, modern tool design is to increased speeds. For high speed applications it is necessary to have design data including the effect of rotational lubricant inertia. This research work contain the design data including the rotational effect have been obtained for annular recess conical bearing, multi recess pad and multi pad bearing with varying viscosity and pressure differences and the relationship with the environmental temperature. Expressions are obtained for the viscosity variation in an externally pressurized thrust bearing the condition when one bearing surface is rotated. The influence of centripetal acceleration and the combined effect of rotational and radial inertia terms are included in this analysis. Rotation of the bearing causes the lubricant to have a velocity component in an axial direction towards the rotating surface as it spirals radically outwards between the bearing surfaces. The environmental conditions, such as low and high temperatures, dust and dirt, moisture and unusual mounting conditions, can also affect a bearing’s performance adversely. Therefore, both mechanical and environmental factors may affect the choice of a bearing and its performance. The more complex the system, the more important it is to assess the application characteristics, to select the proper bearing type and features, and to optimize the lubricant type.

 

Keywords : Hydrostatic, Applications , Temperatures, Lubricant, Environmental

 

 

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