CAJ | 학술논문

研究接触式机械密封端面平均温度与端面摩擦因数相耦合的计算方法问题。将机械密封环简化为等截面当量筒体，推导出了接触式机械密封端面平均温度的计算式，给出了密封环简化为当量筒体的具体方法；基于分形理论，建立了接触式机械密封端面摩擦因数计算模型。考虑端面平均温度与端面摩擦因数的相互耦合关系，提出了端面平均温度的具体计算方法。通过模拟计算，对B104a-70型机械密封端面平均温度的影响因素进行了分析。结果表明，端面平均温度随着弹簧比压或密封流体压力的增大，线性地增大；随着转速的增大，近似线性地增大，且端面越光滑，线性越好，增大的幅度也越大；随着端面分形维数的增大或特征尺度系数的减小，非线性地增大，当端面较粗糙时，端面平均温度的变化较小；当端面较光滑时，随着端面分形维数的增大或特征尺度系数的减小，端面平均温度迅速增大。
연구접촉식궤계밀봉단면평균온도여단면마찰인수상우합적계산방법문제。장궤계밀봉배간화위등절면당량통체，추도출료접촉식궤계밀봉단면평균온도적계산식，급출료밀봉배간화위당량통체적구체방법；기우분형이론，건립료접촉식궤계밀봉단면마찰인수계산모형。고필단면평균온도여단면마찰인수적상호우합관계，제출료단면평균온도적구체계산방법。통과모의계산，대B104a-70형궤계밀봉단면평균온도적영향인소진행료분석。결과표명，단면평균온도수착탄황비압혹밀봉류체압력적증대，선성지증대；수착전속적증대，근사선성지증대，차단면월광활，선성월호，증대적폭도야월대；수착단면분형유수적증대혹특정척도계수적감소，비선성지증대，당단면교조조시，단면평균온도적변화교소；당단면교광활시，수착단면분형유수적증대혹특정척도계수적감소，단면평균온도신속증대。
Mutual coupling calculating method of average temperature and friction factor of end face for contact mechanical seal was studied. Simplifying the mechanical seal ring as equal cross-section equivalent cylinder, average temperature calculation equation of end face for contact mechanical seal was derived, and the method of simplifying the mechanical seal ring as equal cross-section equivalent cylinder was given. Friction factor calculation model of end face for mechanical seal was established based on fractal theory. Taking into account the mutual coupling relationship between average temperature and friction factor of end face, the calculation method of average temperature was proposed. Influence factors of average temperature for B104a-70 mechanical seal were analyzed by simulation. Average temperature of end face increased linearly with increasing spring pressure and sealant pressure, and increased approximately linearly with increasing rotating speed, and the smoother the end face, the better the linear relationship and the greater the increase. Average temperature of end face increased nonlinearly with increasing fractal dimension or decreasing characteristic length scale. The change of average temperature was small when end face was coarse. It increased rapidly with increasing fractal dimension or decreasing characteristic length scale when end face was smooth.