石油机械
石油機械
석유궤계
China Petroleum Machinery
2015年
10期
63-67
,共5页
解永超%陈国明%张叶%孙政委%张建宾
解永超%陳國明%張葉%孫政委%張建賓
해영초%진국명%장협%손정위%장건빈
叶片圆盘泵%压力脉动%扬程%径向力%数值模拟%蜗壳%叶片
葉片圓盤泵%壓力脈動%颺程%徑嚮力%數值模擬%蝸殼%葉片
협편원반빙%압력맥동%양정%경향력%수치모의%와각%협편
disc pump with radial straight blade%pressure fluctuation%pump head%radial force%numeri-cal simulation%volute%blade
开展叶片圆盘泵压力脉动相关研究对于了解其瞬态特性，提高其运行稳定性具有重要意义。应用Fluent软件对叶片圆盘泵内部流场进行了三维非定常数值模拟，在外特性试验验证的基础上，分析了设计工况下叶轮内压力、蜗壳内压力、扬程脉动情况以及叶轮径向力变化规律和影响因素。分析结果表明，泵内监测点压力脉动周期取决于叶轮叶片数目，且前、后盖板有叶区内监测点压力脉动规律基本相同，无叶区压力脉动幅值小于有叶区压力脉动幅值，隔舌附近压力脉动幅值最大，且蜗壳入口侧大于出口侧；扬程脉动周期与监测点压力脉动周期相同，当叶片转至隔舌时扬程为极小值，隔舌处于相邻2叶片中间位置时扬程为极大值。叶轮所受径向力变化周期与叶轮转动周期相同，径向力2垂直分量呈正弦规律变化。
開展葉片圓盤泵壓力脈動相關研究對于瞭解其瞬態特性，提高其運行穩定性具有重要意義。應用Fluent軟件對葉片圓盤泵內部流場進行瞭三維非定常數值模擬，在外特性試驗驗證的基礎上，分析瞭設計工況下葉輪內壓力、蝸殼內壓力、颺程脈動情況以及葉輪徑嚮力變化規律和影響因素。分析結果錶明，泵內鑑測點壓力脈動週期取決于葉輪葉片數目，且前、後蓋闆有葉區內鑑測點壓力脈動規律基本相同，無葉區壓力脈動幅值小于有葉區壓力脈動幅值，隔舌附近壓力脈動幅值最大，且蝸殼入口側大于齣口側；颺程脈動週期與鑑測點壓力脈動週期相同，噹葉片轉至隔舌時颺程為極小值，隔舌處于相鄰2葉片中間位置時颺程為極大值。葉輪所受徑嚮力變化週期與葉輪轉動週期相同，徑嚮力2垂直分量呈正絃規律變化。
개전협편원반빙압력맥동상관연구대우료해기순태특성，제고기운행은정성구유중요의의。응용Fluent연건대협편원반빙내부류장진행료삼유비정상수치모의，재외특성시험험증적기출상，분석료설계공황하협륜내압력、와각내압력、양정맥동정황이급협륜경향력변화규률화영향인소。분석결과표명，빙내감측점압력맥동주기취결우협륜협편수목，차전、후개판유협구내감측점압력맥동규률기본상동，무협구압력맥동폭치소우유협구압력맥동폭치，격설부근압력맥동폭치최대，차와각입구측대우출구측；양정맥동주기여감측점압력맥동주기상동，당협편전지격설시양정위겁소치，격설처우상린2협편중간위치시양정위겁대치。협륜소수경향력변화주기여협륜전동주기상동，경향력2수직분량정정현규률변화。
Study on pressure fluctuation of disc pump with radial straight blade has a great significance on un?derstanding the pump transient characteristics and improving its operating stability?Three?dimensional unsteady nu?merical simulation has been conducted on the inner flow field of the pump by using Fluent software?Pressure fluctu?ations in the impeller and the volute and the pump head pressure fluctuation, as well as the impeller radial force changing law and the influencing factors have been analyzed based on the validation of outer characteristic test?The results show that the pressure pulsation period of the monitoring point within the pump depends on the number of impeller blades?The pressure pulsation at the monitoring points in the front and back cover area with blades is basi?cally the same?The pressure pulsation amplitude in the non?blade area is smaller?The maximum pressure pulsation amplitude occurs near the volute tongue?The volute inlet side has larger pressure pulsation amplitude than the outlet side?The pump head pulsation cycle is the same as the pressure pulsation cycle of the monitoring points?The pump head has the minimum value when blade turns to the volute tongue and has the maximum value when the blade is at the center of two adjacent blades?The pump impeller radial force variation cycle is the same as the impeller rotation cycle?The vertical component of the radial force 2 varies in a sinusoidal way.
