大型拖拉机液压转向系统热平衡研究
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摘要
针对某款东方红大型拖拉机作业时,液压转向系统发热偏高,危害系统正常运行的问题,对拖拉机液压转向系统热平衡进行研究.通过分析系统的运行工况、产热和散热特点,提供了系统各元件产热功率和散热功率的计算方法,并建立了系统的热平衡数学模型,利用Matlab进行数值仿真,模拟了系统对外界环境的相对温度变化特性.改进了原系统模型,将新旧方案进行仿真对比后得出结论:增大系统油管管径,可有效降低管路功率损失;增大油箱体积,可提高系统高油液总量和散热面积,从而降低系统温升速率和热平衡温度,改善温度过高状况.
The heat balance of the hydraulic steering system in a certain Dongfanghong tractor is studied,to solve the problem that the heat balance temperature is a little too high,which endangers the system normal operation.By analyzing the operating conditions,heat generation and heat dissipation characteristics of the system,the calculation methods of heat generation power and heat dissipation power of each component in the system are provided,and the mathematical model of heat balance relationship of the system is established.The numerical analysis is carried out by using Matlab to simulate the change characteristics of the the system relative temperature to the environment.The original system model is improved,the new and old model are simulated and compared.The conclusions are drawn that increasing the diameter of the system tubes can effectively reduce their power loss;increasing the volume of the tank can improve the total amount of oil and heat dissipation area,thus the temperature rise rate and heat balance temperature of the system can be reduced,and the heating condition of the system can be improved.
The heat balance of the hydraulic steering system in a certain Dongfanghong tractor is studied,to solve the problem that the heat balance temperature is a little too high,which endangers the system normal operation.By analyzing the operating conditions,heat generation and heat dissipation characteristics of the system,the calculation methods of heat generation power and heat dissipation power of each component in the system are provided,and the mathematical model of heat balance relationship of the system is established.The numerical analysis is carried out by using Matlab to simulate the change characteristics of the the system relative temperature to the environment.The original system model is improved,the new and old model are simulated and compared.The conclusions are drawn that increasing the diameter of the system tubes can effectively reduce their power loss;increasing the volume of the tank can improve the total amount of oil and heat dissipation area,thus the temperature rise rate and heat balance temperature of the system can be reduced,and the heating condition of the system can be improved.
引文
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[2]王剑鹏,秦四成,杨立光,等.装载机转向液压系统的热平衡分析与比较[J].中南大学学报(自然科学版),2016(5):27-32.WANG J P,QIN S C,YANG L G,et al.Thermal balance analysis and comparison of loader steering hydraulic system[J].Journal of Central South University(Natural Science Edition),2016(5):27-32.
[3]张林慧.闭式液压系统油温过高的分析与计算[J].煤矿机械,2011(11):38-40.ZHANG L H.Analysis and calculation of high oil temperature in closed hydraulic system[J].Coal Mining Machinery,2011(11):38-40.
[4]栾新立,栾文博.液压系统热平衡计算和冷却方式的设计[J].拖拉机与农用运输车,2008(1):59-60.LUAN X L,LUAN W B.Heat balance calculation of hydraulic system and design of cooling mode[J].Tractors and Agricultural Transporters,2008(1):59-60.
[5]张伟,贾福音,董孟娟,等.液压系统热平衡匹配研究[J].液压气动与密封,2013(1):49-53.ZHANG W,JIA F Y,DONG M J,et al.Study on thermal balance of hydraulic system[J].Hydraulic Pneumatic and Seal,2013(1):49-53.
[6]陈纪军.320吨静力压桩机液压系统热平衡研究[D].长沙:中南大学,2012.CHEN J J.Research on thermal balance of hydraulic system of320tons static pile driver[D].Changsha:Central South University,2012.
[7]崔秦洲,吴海霞.804P拖拉机液压系统热平衡问题的解决[J].农业装备与车辆工程,2012,50(10):54-56.CUI Q Z,WU H X.Solution to heating balance of hydraulic system in 804P tractor[J].Agricultural Equipment and Vehicle Engineering,2012,50(10):54-56.
[8]岳丽敏,文晓娟,索小娟.D08-32型捣固车液压系统工作油温过高原因分析及改造方案的探讨[J].机床与液压,2015,43(20):179-182.YUE L M,WEN X J,SUO X J.D08-32tamping truck hydraulic system working oil temperature is too high cause analysis and reform program discussion[J].Machine Tool and Hydraulics,2015,43(20):179-182.
[9]牛宏杰,李盛龙,唐斌.滑移装载机液压系统热平衡研究与优化分析[J].工程机械,2013,44:16-19.NIU H J,LI S L,TANG B.Research and optimization analysis on thermal balance of hydraulic system in sliding loader[J].Construction Machinery,2013,44:16-19.
[10]褚克勤,潘云霓.恒流泵的原理与选用[J].拖拉机,1994(2):22-24.CHU K Q,PAN Y N.Principle and selection of constant-flow pump[J].Tractor,1994(2):22-24.
[11]雷天觉.新编液压工程手册[M].北京:机械工业出版社,2001:3-130.LEI T J.New manual of hydraulic engineering[M].Beijing:Machinery Industry Press,2001:3-130.
[12]秦彦凯.掘进机液压系统热平衡研究[J].煤矿机械,2014,35(6):44-46.QIN Y K.Research on heat balance of roadheader hydraulic system[J].Coal Mine Machinery,2014,35(6):44-46.
[13]章熙民,任泽霈,梅飞鸣.传热学[M].北京:中国建筑工业出版社,2001.ZHANG X M,REN Z P,MEI F M.Heat transfer[M].Beijing:China Construction Industry Press,2001.
[14]林青山.小五吨叉车液压油温过高分析计算及解决方案[J].叉车技术,2014(4):15-18.LIN Q S.Analysis and solutions to excessive hydraulic oil temperature of small five-ton forklift truck[J].Forklift Technology,2014(4):15-18.
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