流体机械
流體機械
류체궤계
FLUID MACHINERY
2014年
5期
5-9
,共5页
孙晓锋%姜德龙%吕兆升%王大力
孫曉鋒%薑德龍%呂兆升%王大力
손효봉%강덕룡%려조승%왕대력
压电泵%双腔%并联%轮式平板阀%粘度
壓電泵%雙腔%併聯%輪式平闆閥%粘度
압전빙%쌍강%병련%륜식평판벌%점도
piezoelectricpump%double-chamber%inparallel%wheelplatevalve%viscosity
为使双腔并联压电泵能够输送较大粘度的液体，设计了一种以5～7μm厚度铍青铜材料加工而成的薄片型轮式平板阀。在理论上分析了阀的过流特性，确定了影响通过阀体流量的因素，即阀自身的几何尺寸、作用在阀两侧的压力差及液体粘度对其影响，并以试验的方法确定了当阀片半径为3．25mm、阀孔半径为2．75mm时，双腔并联压电泵输出流量最好。分别以不同浓度的甘油水溶液作为试验液体，测试了在不同液体粘度、不同工作频率下双腔并联压电泵的输出流量。试验发现，随着液体粘度的增加，阀开启时的阻力增大，开启量变小，阀和压电振子之间振动相位差不断加大，截止性能变差，压电泵净输出量减少。在液体粘度μ＝1．311mPa·s时，压电泵的最大输出流量可达1300mL/min，而当液体粘度μ＝234．6mPa·s时，压电泵的最大输出流量仅为30 mL/min左右。试验结果为获得双腔并联压电泵输送不同粘度液体的能力提供了可靠的数据。
為使雙腔併聯壓電泵能夠輸送較大粘度的液體，設計瞭一種以5～7μm厚度鈹青銅材料加工而成的薄片型輪式平闆閥。在理論上分析瞭閥的過流特性，確定瞭影響通過閥體流量的因素，即閥自身的幾何呎吋、作用在閥兩側的壓力差及液體粘度對其影響，併以試驗的方法確定瞭噹閥片半徑為3．25mm、閥孔半徑為2．75mm時，雙腔併聯壓電泵輸齣流量最好。分彆以不同濃度的甘油水溶液作為試驗液體，測試瞭在不同液體粘度、不同工作頻率下雙腔併聯壓電泵的輸齣流量。試驗髮現，隨著液體粘度的增加，閥開啟時的阻力增大，開啟量變小，閥和壓電振子之間振動相位差不斷加大，截止性能變差，壓電泵淨輸齣量減少。在液體粘度μ＝1．311mPa·s時，壓電泵的最大輸齣流量可達1300mL/min，而噹液體粘度μ＝234．6mPa·s時，壓電泵的最大輸齣流量僅為30 mL/min左右。試驗結果為穫得雙腔併聯壓電泵輸送不同粘度液體的能力提供瞭可靠的數據。
위사쌍강병련압전빙능구수송교대점도적액체，설계료일충이5～7μm후도피청동재료가공이성적박편형륜식평판벌。재이론상분석료벌적과류특성，학정료영향통과벌체류량적인소，즉벌자신적궤하척촌、작용재벌량측적압력차급액체점도대기영향，병이시험적방법학정료당벌편반경위3．25mm、벌공반경위2．75mm시，쌍강병련압전빙수출류량최호。분별이불동농도적감유수용액작위시험액체，측시료재불동액체점도、불동공작빈솔하쌍강병련압전빙적수출류량。시험발현，수착액체점도적증가，벌개계시적조력증대，개계량변소，벌화압전진자지간진동상위차불단가대，절지성능변차，압전빙정수출량감소。재액체점도μ＝1．311mPa·s시，압전빙적최대수출류량가체1300mL/min，이당액체점도μ＝234．6mPa·s시，압전빙적최대수출류량부위30 mL/min좌우。시험결과위획득쌍강병련압전빙수송불동점도액체적능력제공료가고적수거。
Inordertopumphighviscosityliquid,designinganewtypeofdouble-chamberpiezoelectricpumpinparallelwitha sheet type wheel flat valve processed by beryllium bronze of 5 ~7μm thickness.Theoretically analyzing the valve static overcurrent characteristics and determining influencing factors of flow-rate through valve,namely the valve size,acting on the valve pressure difference of both sides and the viscosity of the fluid.Double-chamber piezoelectric pump in parallel output flow-rate is best when the valve plate radius is 3.25mm and valve hole radius is 2.75mm determined by experimental method,.In order to obtain Influ-ence of liquid viscosity on output performance of double-chamber piezoelectric pump in parallel,testing output flow-rate in the dif-ferent operating frequencies of the different liquid viscosity with different concentrations of glycerol aqueous solution as the test liquid.The experiment results show that the resistance increased greatly as increase of the viscosity of the fluid increased ,valve opening quantity get smaller.With the phase difference between the vibration of the valve and the vibrator continue to increase , the net output performance of the pump is reduced.Under the conditions of 1.311mPa·s liquid viscosity,the maximum pump output flow rate up to 1300mL/min,but under the conditions of 234.6mPa·s,pumping output flow rate is only 30mL/min.Test results provide reliable data for obtaining the double-chamber piezoelectric pump in parallel capacity of the different viscosity fluid.
