压力角对齿轮泵整体性能的耦合影响与分析.pdfVIP

压力角对齿轮泵整体性能的耦合影响与分析

摘要：为挖掘压力角对齿轮泵整体性能的综合影响及分析，以20。标准压力角及25。大压力角和大侧

隙齿轮副为例，在分析压力角对齿轮副传动平稳性、泵内密封、输出流量特性、泵轻量化效果等性能的基础

上，重点分析大压力角对重迭系数和卸荷面积及其困油压力的综合影响。结果表明：相对于20。的标准压力

角，25。时虽然重迭系数下降9.64%,流量脉动系数下降7.33%，单位排量泵体积下降0.37%，最大困油流量

下降49.14%，但齿顶压力角增大10.58%，顶齿厚角下降16.36%，卸荷面积大幅下降69.20%,由此虽然明

显改善了流量脉动，但是降低了传动平稳性和径向密封效果，且对泵的轻量化效果和困油现象的改善很小；

轴向缝隙对困油现象的缓解效果更灵敏更明显;针对齿轮泵整体性能的改善而言，大压力角并非有效方案。

关键词：齿轮泵;压力角；整体性能;综合影响；重迭系数;卸荷面积；困油压力

ComprehensiveInfluenceandFollowingAnalysisofPressure-angleon

OverallPerformanceofGearPumps

Abstract:Inordertoexploreandanalysethecomprehensiveeffectofpressure-angleontheoverallperformanceof

gearpumps,byalargepressure-angleof25°relativetothestandardpressure-angleof20°andgearpairwithlarge

backlashasexample,theinfluenceofpressure-angleontheperformanceofgeartransmissionstability,radialseal

insidegearpump,outputflowcharacteristics,pumplightweighteffectfirstly；thecomprehensiveeffectofhigh

pressure-angleonoverlapcoefficient,reliefareaandfollowingtrapped-oilpressureisanalyzedfinally.Allresults

showthatcomparedw让hthestandardpressure-angleof20°,contactratio,flowripplefactor,pumpvolumeperunit

displacement,themaximumtrapped-oilflowrespectivelydecreasedby9.64%,7.33%,0.37%,49.14%at

25°,butaddendumpressureangleincreasedby10.58%,addendumthicknessangledecreasedby16.36%,and

reliefareadecreasedby69.20%significantly;therefore,flow-rippleisobviouslyimproved,butthetransmission

stabilityandradialsealingeffectarereduced,andthe丘ghtweighteffectandtrappedoilphenomenonarelittle

improved；theaxialgaphasamoresensitiveandobviouseffectontherelievingtrapped-oilphenomenon,etc.Itis

concludedthatthelargepressure-angleisnotaneffectiveschemetoimproveoverallperformanceofgearpump.

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