| 摘要 |
PURPOSE:To prevent the generation of pressure rise in a circumferential hydraulic escape groove section communicated with the outside, and to improve the stability of the bearing by forming the groove at the central section of a plain surface. CONSTITUTION:The circumferential hydraulic escape groove 2 is formed to the inner circumferential surface of the bearing 1 while hydraulic escape holes 5a, 5b communicated with the outside of the bearing from the bottom of the groove are formed. When the quantity of lubricating oil supplied is too much and the quantity of the oil flowing into the groove 2 is increased, oil pressure is generated in the groove, but pressure in the groove is not increased and kept because the groove 2 is communicated with the outside. Accordingly, the pressure distribution of a bearing oil film is separated positively at the groove section, the ratio of apparent effective length to a bearing diameter is decreased, the rate of eccentricity is elevated, and stability is improved. |
