1973 Volume 16 Issue 92 Pages 441-446
A study was carried out on the oil flow in a short-bearing with a circumferential oil groove, in consideration of oil film disintegration and restoration on the unloaded side.(1) The ratio between dimensionless oil flow coefficient of the circumferentially grooved bearing (qT) and the hydrodynamic flow coefficient obtained by the short-bearing approximation (qH=2n) was found to be a function of the oil feed capacity number (Cnpf) only so far as the present experiment is concerned (Cn=2×10-3∼10-1, Cnpf=5×10-2∼2). Results of the experiment coincided well with the theoretical values.(2) qT/2n value of the circumferentially grooved bearing converged to zero as Cnpf increased to a large value, while, in bearings with an axial groove or an oil hole, qT/2n converged to finite values.(3) In the case of a circumferentially grooved bearing, unlike the other types of bearings, the oil flow could not be divided into two components resulting from the oil-feed pressure and the hydrodynamic film pressure, because the hydrodynamic component itself was affected by the oil-feed pressure.
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