Abstract
This paper uses numerical simulation to study the influences of viscosity ratio on the static characteristics of hydrostatic thrust bearing compensated by various restrictors. The design parameters of open type hydrostatic bearing include: effective area, supply pressure, restriction constants of restrictor and bearing pad, and specific value of average viscosity of the lubricant passing through restrictor and bearing pad film. The optimal design requirements of restrictors and hydrostatic bearing and the corresponding range of design parameters for excellent bearing characteristics can be obtained from the relationships between these design parameters together with their composed parameters and ratios, and the static load capacity and film stiffness and worktable displacement of hydrostatic bearing. Fixing the other design parameters and changing viscosity ratio, the simulation results depict that the lubricant viscosity during restrictor being greater than that in bearing pad film will make the load capacity decrease, but will improve the film static stiffness.
Highlights
Hydrostatic bearings according to their applications can be divided into thrust, radial and biaxial three kind bearing systems
The restrictors can apply constant compensations such as capillary, orifice and slot, or variable compensations such as pressure feedback driving membranetype and spool-type restrictors, or use one recess connected to one constant flow pump or valve to adjust supply pressure into working pressure by constant flow compensation
Bouzidane and Thomas [5-6] studied the vibration control of an ER hydrostatic journal bearing. They found that the viscosity of a negative ER (NER) fluid will decrease with an electric field applied
Summary
Hydrostatic bearings according to their applications can be divided into thrust, radial and biaxial three kind bearing systems. Bouzidane and Thomas [5-6] studied the vibration control of an ER hydrostatic journal bearing They found that the viscosity of a negative ER (NER) fluid will decrease with an electric field applied. They didn't discussed the influence of viscosity caused by temperature for the load capacity and static stiffness These previous studies of hydrostatic bearing applied electromagnetic rheological fluid as lubricant. When the local external magnetic field affected lubricant viscosity as it pass through at the same time, the characteristics of bearing have been changed This is mainly caused by the difference between the viscosity of lubricant flowing through the restrictor and supporting film within the system. This study investigated the influences of viscosity ratio of lubricant passing through restrictor to supporting film on the static characteristics and performances of hydrostatic bearing
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
