化工学报
化工學報
화공학보
JOURNAL OF CHEMICAL INDUSY AND ENGINEERING (CHINA)
2015年
7期
2464-2473
,共10页
顾东升%孙见君%马晨波%陆建花
顧東升%孫見君%馬晨波%陸建花
고동승%손견군%마신파%륙건화
自泵送机械密封%正交试验%数值模拟%计算流体力学%优化
自泵送機械密封%正交試驗%數值模擬%計算流體力學%優化
자빙송궤계밀봉%정교시험%수치모의%계산류체역학%우화
self-pumping mechanical seal%orthogonal test%numerical simulation%CFD%optimization
提出了一种进液槽设置于静环、动压槽分布于动环的自泵送流体动压型机械密封;运用正交试验法设计了自泵送机械密封试验方案,并基于Fluent进行了数值模拟试验,探讨了各试验参数对端面开启力和泄漏率影响的显著性。研究结果表明:在试验参数范围内,影响端面开启力FO的显著因素为槽数Ng、槽长坝长比γ、槽台宽比d和压差p;影响泄漏量Q的显著因素为槽数Ng、槽长坝长比γ、槽台宽比d、转速n和压差p;具体表现为开启力随着槽长坝长比、槽台宽比、密封端面内外压差的增大呈上升趋势,随着槽数的增多呈下降趋势;泄漏量随着槽长坝长比、槽台宽比、转速、密封端面内外压差的增大呈上升趋势,随着槽数的增多而呈下降趋势。依据正交试验分析结果,提出了初步优化的密封端面型槽结构。
提齣瞭一種進液槽設置于靜環、動壓槽分佈于動環的自泵送流體動壓型機械密封;運用正交試驗法設計瞭自泵送機械密封試驗方案,併基于Fluent進行瞭數值模擬試驗,探討瞭各試驗參數對耑麵開啟力和洩漏率影響的顯著性。研究結果錶明:在試驗參數範圍內,影響耑麵開啟力FO的顯著因素為槽數Ng、槽長壩長比γ、槽檯寬比d和壓差p;影響洩漏量Q的顯著因素為槽數Ng、槽長壩長比γ、槽檯寬比d、轉速n和壓差p;具體錶現為開啟力隨著槽長壩長比、槽檯寬比、密封耑麵內外壓差的增大呈上升趨勢,隨著槽數的增多呈下降趨勢;洩漏量隨著槽長壩長比、槽檯寬比、轉速、密封耑麵內外壓差的增大呈上升趨勢,隨著槽數的增多而呈下降趨勢。依據正交試驗分析結果,提齣瞭初步優化的密封耑麵型槽結構。
제출료일충진액조설치우정배、동압조분포우동배적자빙송류체동압형궤계밀봉;운용정교시험법설계료자빙송궤계밀봉시험방안,병기우Fluent진행료수치모의시험,탐토료각시험삼수대단면개계력화설루솔영향적현저성。연구결과표명:재시험삼수범위내,영향단면개계력FO적현저인소위조수Ng、조장패장비γ、조태관비d화압차p;영향설루량Q적현저인소위조수Ng、조장패장비γ、조태관비d、전속n화압차p;구체표현위개계력수착조장패장비、조태관비、밀봉단면내외압차적증대정상승추세,수착조수적증다정하강추세;설루량수착조장패장비、조태관비、전속、밀봉단면내외압차적증대정상승추세,수착조수적증다이정하강추세。의거정교시험분석결과,제출료초보우화적밀봉단면형조결구。
A kind of self-pumping hydrodynamic mechanical seal, that the liquid inlet groove was arranged on the stationary ring and the dynamic pressure groove was distributed on the rotating ring, was put forward based on the principle of centrifugal pump. The experimental scheme of the self-pumping mechanical seals was designed by orthogonal test. The numerical simulation experiments were carried out based on Fluent, including discussing the significant effects of every parameter on the face opening force and the leakage rate. The numerical results showed that the groove number Ng, the ratio of groove length and dam lengthγ, the ratio of groove width and ridge width d, and the pressure p were the significant factors affecting the opening force FO and the leakage rate Q within the experimental ranges. Besides, the rotate speed n also affected Q significantly. Specifically, FO was increased with increasingγ, d and p, while decreased with increasing Ng. The influence ofγ, d, p and Ng on Q was similar to that on FO. But Q was also increased with increasing n. The preliminary optimization of sealing structure was brought forward by analyzing the results of orthogonal test.