摘要
The existing leakage models,which include smooth plane leakage model,rough and waveform surface leakage model,and tapered-face leakage model,can not be applied to describing the active state of contacting mechanical seal.In these models,only prime microscopic surface topography and constant leakage rate are taken into consideration.Based on fractal geometry theory,a leakage model was established with consideration of the change of microscopic surface topography and time-correlation of leakage rate.The relationship between leakage rate,the change of microscopic surface topography of seal surface and leaking channel under operation conditions was described quantitatively by fractal parameter with unattached dimension.There existed an optimum fractal parameter during the mechanical seal running,which corresponded to the lowest leakage rate.The research results helped to ascertain the roughness and waviness of seal surface,and to select machining methods of sealing members.According to the leakage model presented in this paper,the leakage rate of contacting mechanical seal can be forecasted,which may be used as reference in the maintenance and operation of mechanical seals.
The existing leakage models, which include smooth plane leakage model, rough and waveform surface leakage model, and tapered-face leakage model, can not be applied to describing the active state of contacting mechanical seal. In these models, only prime microscopic surface topography and constant leakage rate are taken into consideration. Based on fractal geometry theory, a leakage model was established with consideration of the change of microscopic surface topography and time-correlation of leakage rate. The relationship between leakage rate, the change of microscopic surface topography of seal surface and leaking channel under operation conditions was described quantitatively by fractal parameter with unattached dimension. There existed an optimum fractal parameter during the mechanical seal running, which corresponded to the lowest leakage rate. The research results helped to ascertain the roughness and waviness of seal surface, and to select machining methods of sealing members. According to the leakage model presented in this paper, the leakage rate of contacting mechanical seal can be forecasted, which may be used as reference in the maintenance and operation of mechanical seals.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2006年第7期1626-1631,共6页
CIESC Journal
基金
江苏省高校自然科学基金项目(04KJD530090)
南京工业大学博士论文创新基金项目(38002014).~~
关键词
机械密封
泄漏模型
表面微观形貌
分形几何
contacting mechanical seal
leakage model
microscopic surface topography
fractal geometry
