轴承是影响内燃机安全运行的重要零件,内燃机的主要运动件中,大多采用滑动轴承。滑动轴承采用流体动力润滑,曲轴的旋转作用形成油楔承载,同时零件表面对油膜挤压产生承载力。内燃机的轴承承载油膜压力由旋转油膜压力和剂压油膜压力构成。主轴瓦和连杆轴瓦在交变载荷下工作,轴承载荷的方向、大小都是周期变化的,所以轴承内不能保持均匀、恒定的承载油膜。在高速、高负荷,特别是在润滑状态不良或进入磨料时,轴承中产生较大的摩擦损失,摩擦损失转变成热量使轴承温 Bearing is an important part affecting the safe operation of internal combustion engines. The main moving parts of internal combustion engines are mostly sliding bearings. Sliding bearings using hydrodynamic lubrication, the role of crankshaft rotation of the formation of oil wedge bearing, while parts of the surface of the oil film extrusion bearing capacity. The internal combustion engine bearing bearing oil film pressure by the rotating oil film pressure and pressure oil film composition. Bearing and connecting rod bearing bush work under alternating load, bearing load direction, the size is periodic changes, so the bearing can not maintain a uniform, constant bearing oil film. In high-speed, high load, especially in poor lubrication or into the abrasive, the bearings have a greater friction loss, the friction loss into heat so that the bearing temperature