摘要
根据Fourier定律导出了双金属轴承工作过程的温升计算模型和衬层厚度设计公式。温升是载荷功率和摩擦系数的线性增函数,其比例系数反映了双金属轴承结构和材料热特性对轴承温升的综合影响作用,它是衬层导热系数λ1的非线性减函数,是衬层厚度δ1的双面函数:当λ1>λ2时为非线性减函数;当λ1<λ2时为非线性增函数。衬层厚度存在临界值,当λ1>λ2时衬层厚度越大越好,但是当λ1<λ2时衬层厚度越小越好。
A computational model for the temperature rise and design formulas for the liner thickness of the bimetal bearing in service are built based on the Fourier＇s law. The temperature rise is a linear increasing function of load power and friction coefficient, and its proportional coefficient is named a thermal - structure factor of the bimetal bearing to express the thermal and structural effects on temperature rise. It is also found that the thermal - structure factor is always a nonlinear decreasing function of the thermal conductivity λ1 of the liner materials. However the thermal - structure factor is a two - sided function of the liner thickness δ1, a nonlinear increasing function （ when λ1〈λ2 ） or a nonlin- ear decreasing function（ when λ1〉λ2 ）. There exists a critic value of the liner thickness, the larger thickness than the critic one is supposed when λ1〉λ2, however, a smaller thickness than the critic one is supposed when λ1〈λ2.
出处
《轴承》
北大核心
2012年第1期12-14,40,共4页
Bearing
关键词
双金属滑动轴承
结构
温升
衬层厚度
bimetal bearing
structure
temperature rise
liner thickness
