考虑非牛顿流体特性的液膜密封温度场分析

Effects of Fluid Non-Newtonian Characteristics on Temperature Field of Liquid-film Seals

以高温油泵用螺旋槽液膜密封为研究对象,建立新型双端面液膜密封整体全尺寸三维模型,分析了幂律指数对螺旋槽液膜密封温度场影响规律。当幂律指数变大、密封端面温度升高、温度梯度逐渐增大时密封端面温度与幂律指数的相关性变大;转速升高、槽角变大、槽数增多、槽深加深,均导致密封环温度升高;当幂律指数一定时,缓冲液压力对密封环温度基本无影响,幂律指数越大,其对密封环温度影响越小。

A three-dimensional model of a new type of dual mechanical seal was established.The influence of power law index on the temperature field of spiral groove liquid film seal was studied.When the power law exponent increased,the temperature of the seal face increased,the temperature gradient increased,and the correlation between the temperature of the seal face and the power law exponent increased.As the speed increased,the groove angle became larger,the number of grooves increased,and the groove depth deepened,causing the temperature of the seal ring to rise.When the power law index was constant,the buffer hydraulic pressure had little effect on the temperature of the sealing ring.