摘要
基于气体润滑理论,采用与螺旋槽端面密封的对比分析方法,研究了均匀分布激光加工多孔端面气体非接触机械密封的稳定性,数值分析了密封间隙、不对中角度和外界扰动对开启力、泄漏量、气膜刚度以及密封间隙扰动振幅等密封参数的影响规律.结果表明:多孔密封中的动压效应微弱,开启力与气膜刚度与转速无关,密封端面开启时容易发生接触磨损;多孔密封端面压力分布均匀,不对中引起的开启力波动幅度小,但是角向容易产生自激振动,密封环外侧容易发生接触磨损;多孔密封轴向气膜刚度较小,具有更小的扰动振幅,密封端面开启后有利于保持密封间隙的稳定,减少密封端面的接触摩擦.
For non-contact face mechanical seal,the stability of seal gap is a key parameter to keep the seal running steady.In the present paper,the stability of laser textured gas-lubricated non-contact mechanical seal（LST-MS） was numerically analyzed compared with spiral face mechanical seal.A series of simulations were carried out to analyze the influence of clearance,pitch angle and disturbance on seal performance.Numerical results showed that the dynamic effect was very weak for LST-MS,which led to contact friction and wear at start off of the mating seal faces.LST-MS has an evener pressure distribution on seal face,which will reduce disturbance of open force induced by pitch angle.LST-MS has a smaller gas film stiffness as well as a clearance disturbance amplitude,which meant the seal had less face contact and friction during running.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2010年第6期521-526,共6页
Tribology
基金
国家自然科学基金项目(50775206
50805130)
浙江省自然科学基金项目(Y1090620
R1090833)
浙江工业大学青年学术带头人和学术骨干支持计划项目(102004829)的资助
关键词
多孔端面
机械密封
气体润滑
稳定性
multi-pored face
mechanical seal
gas lubrication
stability
