摘要
开发一种高压滑环组合密封——锥形滑环组合密封。它采用2个O型橡胶圈,以增大对滑环的挤压能力;在两O型圈之间装有一金属挡隔圈,左侧O型圈在密封腔内压作用下通过挡隔圈来挤压右侧O型圈,增大其变形,提高对滑环右端区域的挤压力;在滑环左侧设计一组弹性元件,安装时给予一定的预压缩量,以其弹性恢复力作为零内压时的密封动力,使密封件在启动时也具有良好的密封性能。该组合密封具有滑环磨损自补偿和根据密封腔内压变化自动调节O型圈截面直径压缩率的功能,适用于磨损严重的恶劣密封环境。数值模拟结果表明,该组合密封的静密封面和动密封面均能满足高压密封条件,且密封安全系数合理。
A kind of combined high-pressure slip ring sealing, combined tapered-slip-ring sealing was developed. Two O-shaped rubber rings were used to elevate the extrusion of slip rings, and a metal ring was used between them so that the left one can press the right one through the metal ring by internal pressure of seal cage to increase the pressure on the right of the slip ring. A set of elastic components were installed on the left of the slip rings. These elastic components were pressed before installation,which can provide a sealing drive by their restoring force when there is no inner pressure so as to ensure the sealing being at good condition when it is started up. The combined sealing has wear-self-compensation func- tion and the function of automatically adjusting the compression ratio of the section diameter of O-shaped seal ring in accordance with the pressure in seal cage. Therefore, it can be applied in bad seal environment even with serious wear. The numerical simulation indicates that this kind of combined sealing has a sufficient sealing performance under high pressure, and the safety factor of the sealing is reasonable.
出处
《润滑与密封》
CAS
CSCD
北大核心
2012年第6期31-36,40,共7页
Lubrication Engineering
基金
四川省教育厅科研项目(11ZB098)
国家"十一五"科技支撑项目(2008BADC4B15)
关键词
滑环组合密封
O型圈
动密封
静密封
sliding combined sealing
O-shape ring
dynamic seal
static seal
