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3)宽度(即轴瓦的轴向长度) 国外实践证明:轴瓦越宽,轴瓦的负荷能力恶化,且易产生边缘负荷,造成负荷不均匀。因此油膜越薄且宽度较窄的轴承,负荷能力相应提高。鉴于此情,国外现对连杆轴瓦其宽度与直径之比缩到L/d=0.4;主轴瓦缩到L/d=0.35～0.40,无油槽时,甚至于达到L/d=0.30。 而国内呢?L/d基本上都相当大,某些发动机(如6140发动机)主轴瓦L/d =0.65。所以容易产生边缘疲劳损坏和加速磨损, 4)油槽和油孔
3) Width (ie axial length of bearing bush) Foreign practice has proved that: the wider bearing bush, the bearing capacity of bearing bush is deteriorated, and the edge load is easily generated, resulting in uneven load. Therefore, the film thinner and narrower width of the bearing, the corresponding increase in load capacity. In view of this situation, the ratio of width to diameter of the connecting rod bearing bush is reduced to L / d = 0.4 in foreign countries; the main bearing bush is shrunk to L / d = 0.35-0.40, or even L / d = 0.30 when there is no oil tank. While in China? L / d are basically quite large, some engines (such as the 6140 engine) main bearing L / d = 0.65. So prone to edge fatigue damage and accelerated wear and tear, 4) tank and hole