胡琼,肖洋,卢迪,曹志康,王旭华,王衍
HU Qiong,XIAO Yang,LU Di,CAO Zhikang,WANG Xuhua,WANG Yan

• 1:江苏海洋大学机械工程学院
• 2:南京航空航天大学直升机传动技术重点实验室

摘要(Abstract)：

为了提高环形间隙密封在封油时的泄漏率计算精度和效率,通过网格无关性检验和试验验证获得了较准确的数值计算方法,并基于此开展了不同关键因子(表面粗糙度、轴向锥度、偏心量和周向线速度)影响下的理论计算研究。结果显示:工业应用中,间隙内油液流动多为层流,油膜网格层数不小于4层,纵横比取1～1.5时,数值计算结果稳定;层流时,表面粗糙度对泄漏率没有影响,而紊流时,粗糙度越大,泄漏率越小;间隙的收敛或发散几乎不影响泄漏,将综合膜厚乘以2修正,理论泄漏率与数值结果十分吻合;两种方法间的计算偏差随偏心量的增大而增加,偏心量不大于0.2 mm时,吻合较好;泄漏率随转速的上升而明显减小,与一般结论不同。
In order to improve the calculation accuracy and efficiency of the leakage rate of the annular clearance seal when sealing oil,an accurate numerical calculation method was obtained through grid independence test and experimental verification.Based on this method,the theoretical calculation research under the influence of different key factors(surface roughness,axial taper,eccentricity and circumferential linear velocity) was carried out. The results show that in industrial application,the oil flow in the clearance is mostly laminar flow,the number of oil film grid layers is not less than 4,and when the aspect ratio is 1～1.5,the numerical result is stable;when the oil flow is laminar flow,the surface roughness has no effect on the leakage rate,when it is turbulent flow,the greater the roughness,the smaller the leakage rate;the convergence or divergence of the clearance is almost independent of the leakage,and the leakage rate obtained by multiplying the comprehensive film thickness by 2 is almost in good agreement with the numerical results;the calculated deviation between the two methods increases with the increase of eccentricity,and the agreement is good when the eccentricity is no more than 0.2 mm;the leakage rate decreases obviously with the increase of rotating speed,which is different from the general conclusion.

关键词(KeyWords)： 环形间隙密封;泄漏率;粗糙度;计算方法
annular clearance seal;leakage rate;surface roughness;calculation methods

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目（52105187,51805199）;; 江苏省自然科学基金项目（BK20191471）;; 江苏省高等学校自然科学研究面上项目（19KJB460010）;; 江苏海洋大学人才引进科研基金项目（KQ19004）;; 江苏省研究生科研创新计划项目（KYCX2021-047）

作者(Author): 胡琼,肖洋,卢迪,曹志康,王旭华,王衍
HU Qiong,XIAO Yang,LU Di,CAO Zhikang,WANG Xuhua,WANG Yan

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