Temperature field analysis of ultra-high speed radial double-face mechanical seal
In order to improve the reliability of the ultra-high-speed radial double-end mechanical seal of the torpedo turbine,a thermal-fluid coupling simulation model of the mechanical seal was established.The temperature characteristics of the end face during the operation of the mechanical seal was analyzed,and the influence of the water groove of rotating ring and the rotating speed of the rotating ring on the temperature of the seal end face were studied.The results show that the tem-perature of the inner seal end face increases first and then decreases along the radius growth direction,with a maximum of 150 ℃.The temperature of the outer seal end face gradually increases along the radius growth direction,with a maximum temperature of 210 ℃,which is higher than the cooling water vaporization temperature of 195 ℃,and the leakage risk of the outer seal is higher.The water groove of rotating ring of mechanical seal can effectively enhance its cooling effect.The tem-perature of the seal end face decreases with the increase of the depth of the water groove.When the depth of the water groove is 3 mm,the maximum temperature of the outer seal end face is 188 ℃,which is lower than the vaporization temperature of the cooling water.The temperature of the inner and outer seal faces increases with the increase of the rotating speed of the ro-tating ring.When the rotating speed increases from 10000 r/min to 50000 r/min,the maximum temperature of the inner seal face increases from 60 ℃ to 125 ℃,and the maximum temperature of the outer seal face increases from 70 ℃ to 185 ℃.
ultra-high speedradial double end facemechanical sealend face temperature
NETL
NSTL
万方数据
