摘要
基于热力单向耦合理论,对螺旋槽机械密封摩擦副界面的热流体进行Fluent数值模拟,得到密封环的温度场分布规律;将得到的温度场作为边界条件之一导入到密封环端面中进行耦合力变形分析,并研究密封环的转速以及介质压力对动静环最大变形影响。结果表明:动静环的最高温度都出现在液膜和环的接触处,且温度由密封端面开始向两端逐渐降低;密封环的变形量相对于液膜厚度较大,其中静环的变形梯度较动环大,其更容易失效;动静环端面最大变形量随转速和介质压力的升高而增大,在选择工况条件时可适当降低转速和介质压力来减少端面变形量。
Based on the unilateral thermal-stress coupling theory, the heat fluid on the on friction pair interface of spiral groove mechanical sealwas numerically simulated by using Fluent to the get distribution rules of temperature field of the sealing ring.The temperature field was imported to the sealing ring as a boundary condition for coupling deformation analysis, and the influences of the rotation speed and the different pressure of fluid film on the maximum deformation of the sealing ring were further studied.The results show that the highest temperature of the static and dynamic ring appears at the contact area of the liquid membrane and the ring, and the temperature is gradually reduced from the surface to both ends of the seal.The deformation of the sealing ring is relatively large with respect to the film thickness, among which the deformation gradient of the static ring is bigger than the dynamic ring, thus the static ring is more susceptible to failure.The maximum deformation of end surface of the dynamic and static ring is increased with the increasing of rotational speed and medium pressure, so that the suitable choice of speed and medium pressure can reduce the deformation.
出处
《润滑与密封》
CAS
CSCD
北大核心
2016年第10期91-97,共7页
Lubrication Engineering
基金
国家自然科学基金项目(51165043)
关键词
机械密封
热力耦合
温度场
密封环
mechanical seal
thermal-solid coupling
temperature field
sealing ring
