I N T R 0 D U C T I 0 N In recent years, the application of double-flow rotary vane compressor in automotive air-conditioning systems has been increased because of its multiple cylinder characteristic. A certain problem is its high friction loss at higher speeds. The greatest amount of the friction is caused by the lubrication systems between the vane tip and the cylinder wall and between vane ...

Hydrodynamic effect is one of the key phenomena in journal bearing lubrication. Many researches have been carried out on supporting force bearing, motion suspension shaft and lubrication effect. This paper studies hydrodynamic from another point view, that is, pumping caused by rotation eccentric with fixed axis. The clearance between rotor stator divided into two sections inlet port outlet por...

Lubrication, one of mankind's oldest engineering disciplines, in the 19th century gained from Reynolds' classical hydrodynamic description a theoretical base unmatched by most of the theories developed in Tribology to date. In the 20th century, however, increasing demands on lubricants shifted the attention from bulk film to ultrathin film lubrication. Finite size limitations imposed constraint...

Based on the sealing mechanism of reciprocating seal, inverse-hydrodynamic-lubrication (IHL) method was adopted in this study to solve Reynolds equation, and a multi-field coupled seal mixed lubrication numerical model established. Considering seals used for aircraft actuators as an example, we obtained performance parameters such leakage friction at different oil pressures, speeds, temperature...

The present study aims to establish a mixed lubrication model for staved stern tube bearings lubricated with water, in which the average Reynolds equation and KE elastic–plastic contact are introduced calculate hydrodynamic pressure pressure, respectively. difference behaviors between circular- flat-staved is compared; moreover, effects of number staves on mixed-lubrication performance these tw...

the objective of this research is geometrical optimization of half toroidal continuously variable transmission (cvt) in order to achieve high power transmission efficiency and low weight. after dynamic analysis of the system, the contact between the disk and the roller is modeled according to elasto-hydrodynamic lubrication principles. accordingly, a computer model is created with geometric, th...

In this paper an analytical model for cold rolling of strip has been described. This model is developed based on the slab method of analysis and the hydrodynamic lubrication. The characteristics of rolling are obtained from the equations of equilibrium and the plate was allowed to strain harden assuming that the lubricant behaves as a Newtonian fluid. The shear stress to the plate is obtained b...

In this paper an analytical model for cold rolling of strip has been described. This model is developed based on the slab method of analysis and the hydrodynamic lubrication. The characteristics of rolling are obtained from the equations of equilibrium and the plate was allowed to strain harden assuming that the lubricant behaves as a Newtonian fluid. The shear stress to the plate is obtained b...