摘要
基于无限窄槽理论推导螺旋槽液膜润滑非接触式机械密封压力分布公式,并校正螺旋槽进出口处的边缘影响系数;计算表征液膜密封性能的承载力、泄漏量、摩擦扭矩等参数,并进行验证;根据双向组合螺旋槽液膜密封的特点,提出基于权重叠加的流场计算方法,并以交错槽为例进行计算,并与Fluent模拟结果进行对比。结果表明:提出的边缘影响系数计算方法更为合理;利用叠加法计算双向组合槽流场得到的结果与Fluent模拟结果的误差在工程允许范围内,验证该方法的可行性,为工程设计与分析提供了可靠的计算方法。
Based on the theory of infinite narrow grooves,the pressure distribution formula of liquid film lubricated noncontacting mechanical sealing with spiral grooves was derived,and the edge effect coefficient to the inlets and outlets of spiral grooves was modified. Parameters representing the liquid sealing performance,including bearing capacity,leakage rate and friction torque were calculated and verified. According to the characteristics of the liquid film seals with bidirectional combination of spiral grooves,a flow field computing method which based on weighted superposition theory was proposed. The flow field was calculated by choosing the staggered spiral groove as the example,and the calculation result was compared with that of Fluent simulation. The results show that the calculation method of edge effect coefficient is much more reasonable. The errors are in allowable range of engineering field between the method to calculate bidirectional combination groove flow field using weighted superposition theory and the method of Fluent simulation,which verifies the feasibility of the method of superposition,and provides reliable calculation method for engineering design and analysis.
出处
《润滑与密封》
CAS
CSCD
北大核心
2016年第4期1-6,共6页
Lubrication Engineering
基金
青岛市黄岛区科技项目(14-1-16)
关键词
液膜密封
边缘影响系数
交错螺旋槽
叠加法
liquid film seal
end effects
staggered spiral groove
method of superposition
