轴瓦白合金碾堆易引起热轴故障。引起向合金碾堆的主要原因是轴瓦和轴颈的接触面积过小。本文根据轴瓦和轴颈的接触比压小于或等于许用比压的要求,计算出轴瓦与轴颈的最小接触角,从而认为厂段修规定的轴瓦与轴颈的接触面,D轴应为40～00%是正确的,应严格按此规定进行配瓦,才能保证行车安全。 Bearing white aluminum alloy heap easily lead to thermal axis failure. The main reason for causing the alloy to heap is that the contact area between the bearing bush and the journal is too small. In this paper, according to the contact pressure of bearing bush and journal less than or equal to the requirement of allowable specific pressure, the minimum contact angle between bearing bush and journal is calculated, so that the contact surface 40 ~ 00% is correct, should be strictly in accordance with the provisions of watts, in order to ensure traffic safety.