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分析了轴承腔的主要热源。建立了轴承及石墨密封摩擦热的计算模型、密封热泄漏量的计算模型、对流换热系数的计算模型及温度场的计算模型。用热网络法建立了轴承腔的热平衡方程组，并采用拟牛顿法求解了该方程组。获得了１０种不同工况下的温度场计算结果，该结果与本文的测试结果基本吻合。
The main heat source of the bearing cavity is analyzed. The calculation model of friction heat of bearing and graphite seal, the calculation model of heat leakage of seal, the calculation model of convection heat transfer coefficient and the calculation model of temperature field are established. The thermal equilibrium equations of the bearing cavity were established by the heat network method. The equations were solved by quasi-Newton method. The calculation results of temperature field under 10 different conditions are obtained, which are in good agreement with the test results in this paper.