高速高压双圆弧斜齿齿轮泵空化抑制措施研究.pdfVIP

高速高压双圆弧斜齿齿轮泵空化

抑制措施研究

摘要：双圆弧斜齿齿轮泵在高速高压工况下其内部流场空化现象严重，对齿轮泵的性能产生不利影响。为抑制齿轮泵的空化，

建立了双圆弧斜齿齿轮泵吸油腔近啮合区域压力数学模型，以该区域压力值最大为目标函数，利用遗传算法对其各个影响因素求

最优解，重新建立齿轮泵三维模型并设定模拟工况，利用动网格技术，通过PUMPLINX对齿轮泵内部流场的空化现象进行数值模

拟，并分析了抑制空化后对齿轮泵的影响。结果表明：抑制空化后齿轮泵内部流场空化现象明显减小，齿轮泵的空化现象得到了

有效的抑制,验证了吸油腔近啮合区域压力数学模型的正确性；相对于抑制空化前，抑制空化后的齿轮泵流量脉动和流量脉动率

明显减小，泵出口流量脉动率减小了25.63%，泵出口平均流量提高了4.4L/min，泵容积效率提高了10.04%，显著提高了双圆弧

斜齿齿轮泵的性能。

关键词：双圆弧斜齿齿轮泵；高速高压；遗传算法；空化抑制；数值模拟

StudyonCavitationSuppressionMeasuresofDoubleCircular-arcHelical

GearPumpwithHigh-speedandHigh-pressure

Abstract:Thedoublecircular-archelicalgearpumphasseriouscavitationinitsinternalflowfieldunderhigh-speedandhigh-pressure,which

adverselyaffectstheperformanceofthegearpump.Inordertosuppressthecavitationofthegearpump,amathematicalmodelofthepressure

inthenearmeshingregionoftheoilsuctioncavityofthedoublecircular-archelicalgearpumpwasestablished.Takingthemaximumpressure

valueintheregionastheobjectivefunction,thegeneticalgorithmwasusedtofindtheoptimalsolutionofeachinfluencingfactor.The3D

modelofthegearpumpwasre-establishedandthesimulationconditionswereset.Thenumericalsimulationofcavitationintheinternalflow

fieldofthegearpumpwascarriedoutbyPUMPLINX,andtheinfluenceofcavitationsuppressiononthegearpumpwasanalyzed.Theresults

showthatthecavitationphenomenonintheinternalflowfieldofthegearpumpdecreasesobviouslyandiseffectivelysuppressed,whichverifies

thecorrectnessofthepressuremathematicalmodelinthenearmeshingregionoftheoilsuctioncavity.Comparedwithbeforecavitation

suppression,theflowpulsationandflowpulsationrateofthegearpumpdecreasedsignificantly,theflowpulsationrateofthepumpoutlet

decreasedby25.63%,theaverageflowrateofthepumpoutl