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国内外大多数中、大功率的柴油机滑动轴承,其结构设计在受力瓦(主轴瓦为下瓦、连杆瓦为上瓦)和非受力瓦上开半圆或一定角度弧长的油槽。并将油槽收尾处设计成与轴瓦内圆相切向收尾的形式。(如图1)所示为 PA6V280连杆上瓦结构图。这种设计润滑油经油槽流入轴承内表面与轴颈间的间隙处将是连续,平稳地,有利于油膜的建立和形成,不会因自然收尾所形成的棱角凸峰使其油道截面的突变。引起润滑油流动的不平稳波动。产生紊流以及瞬时低压构成气泡,造成气蚀现象,破坏油膜的形成。造成临界摩擦,严重时将导致熔焊而抱轴。
Most of the domestic and foreign, high-power diesel engine sliding bearings, the structural design of the force in the tile (the main bearing tile for the next tile, connecting rod tile on the tile) and non-force tile to open a semicircle or an arc angle of the tank. And the oil tails at the end of the design and the bearing inner tangential tangential end form. (Figure 1) shows the PA6V280 link on the tile structure. This design of the oil into the bearing through the oil groove between the bearing surface and the journal will be continuous and smooth, conducive to the establishment and formation of oil film, will not be due to the natural end of the formation of angular convex peak so that the oil section mutation. Causes uneven flow of lubricant. Turbulence and the formation of instantaneous low pressure bubbles, resulting in cavitation, damage the formation of oil film. Caused critical friction, severe welding will lead and hold the shaft.