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(一)前言柴油机主轴瓦和连杆瓦工作的可靠性在整个柴油机工作可靠性中占据重要地位,而轴瓦可靠工作的一个极为重要的参数就是余面高度。合适的余面高度可使轴瓦均匀可靠地贴合在轴承孔座上,达到足够的刚度和精度,有利轴瓦的散热,降低轴瓦的工作温度,从而提高轴瓦的承载能力。过大的轴瓦余面高度会使轴瓦在组装状态下瓦口向内勾缩,甚至超过瓦背材料的屈服限;过小的轴瓦余面高度会使轴瓦与座孔贴合不良,散热差,润滑恶化,在负荷的作用下会引起轴瓦工作表面烧损,甚至轴瓦
(A) of the preface The reliability of the diesel engine main bearing and connecting rod watts occupy an important position in the reliability of the entire diesel engine, and a very important parameter for the reliable work of the bearing bush is the excess surface height. Appropriate excess surface height allows the bearing bush to be evenly and reliably fitted to the bearing seat to achieve sufficient rigidity and precision, which is advantageous to the heat dissipation of the bearing bush and reduces the working temperature of the bearing bush so as to improve the bearing capacity of the bearing bush. Excessive bearing pad height will make the bearing bush in the assembled state inward retraction, even beyond the yield limit of the tile backing material; too small bearing pad surface height will fit the bearing bush and seat hole poor, poor heat dissipation, lubrication Deterioration, the role of the load will cause the bearing surface burn, or even bearing