轴向柱塞式电液泵的油隙损耗与机械效率
|
摘要
介绍了轴向柱塞式电液泵的结构与工作过程,分析了轴向柱塞式电液泵的各种机械损耗,建立了其机械效率的计算模型,在此基础上给出了定子与转子间油隙损耗与机械效率随转速、压力、温度变化的曲线.计算结果表明,研究的这种轴向柱塞式电液泵在油温50℃、转速4 000 r/min、压力28 MPa时的油隙损耗只占总机械功率的1.737%,大大低于传统电机-泵组中电机的风扇与机械损耗,此时电液泵机械效率为92.6%,高于传统电机-泵组.机械效率的提高使得轴向柱塞式电液泵的总效率高于传统电机-泵组.分析了油隙长度对其损耗的影响,结果表明该电液泵油隙长度仍有减小的空间.
From the innovation perspective,the structure and working process of axial piston EHP were described. With various mechanical losses analyzed,the mechanical efficiency calculation model of EHP was established and the oil gap loss as well as mechanical efficiency varying with speed,pressure and temperature was respectively presented. The simulation at the temperature of 50 ℃,the speed of 4 000 r /min and the pressure of 28 MPa shows a relatively high working efficiency. The oil gap loss of EHP is 1. 737%,which is much lower than the van and mechanical losses of motors in traditional motor-pump set. And the mechanical efficiency is 92. 6%,which is higher than traditional motor-pump set. The mechanical efficiency improvement makes the overall efficiency of the axial piston EHP higher than motor-pump set. The influences to the loss by the oil gap length were analyzed,and the result indicates that the oil gap length can be further reduced.
From the innovation perspective,the structure and working process of axial piston EHP were described. With various mechanical losses analyzed,the mechanical efficiency calculation model of EHP was established and the oil gap loss as well as mechanical efficiency varying with speed,pressure and temperature was respectively presented. The simulation at the temperature of 50 ℃,the speed of 4 000 r /min and the pressure of 28 MPa shows a relatively high working efficiency. The oil gap loss of EHP is 1. 737%,which is much lower than the van and mechanical losses of motors in traditional motor-pump set. And the mechanical efficiency is 92. 6%,which is higher than traditional motor-pump set. The mechanical efficiency improvement makes the overall efficiency of the axial piston EHP higher than motor-pump set. The influences to the loss by the oil gap length were analyzed,and the result indicates that the oil gap length can be further reduced.
引文
[1]付永领,李祝锋,安高成,等.电液泵发展现状与关键技术综述[J].机床与液压,2012,40(1):143-149Fu Yongling,Li Zhufeng,An Gaocheng,et al.Review of the stateof the art and core techniques of edropump[J].Machine Tool and Hydraulics,2012,40(1):143-149(in Chinese)
[2]Fu Y L,Li Z F,Zhang P,et al.Mechanical and hydraulic joint modeling and simulation about elec-pump[J].Advanced Materials Research,2013,694-697:614-620
[3]Leslie M C,Robert C H.Integrated electric motor driven in line hydraulic pump:USA,5708311[P].1998-01-13
[4]Allan A V.Integrated motor pump combination:USA,4850812[P].1989-07-25
[5]Kazunori K,Masaaki S.Masahito H.Fluid pressure generating device:USA,5591013[P].1997-01-07
[6]Franz A,Gunther N.Motor driven pump unit:USA,US2004/0136847 A1[P].2004-07-15
[7]Gerd H,Franz A.Motor-pump unit:USA,US7381036 B2[P].2008-06-03
[8]付永领,安高成,李祝锋,等.一种永磁伺服内啮合齿轮式电液泵:中国,201320327018.3[P].2013-09-29Fu Yongling,An Gaocheng,Li Zhufeng,et al.Permanent magnet servo internal gear electro-hydaulic pump:China,201320327018.3[P].2013-09-29(in Chinese)
[9]刘锦波,张承慧.电机与拖动[M].北京:清华大学出版社,2006:359Liu Jinbo,Zhang Chenghui.Electric machinery and electric drives[M].Beijing:Tsinghua University Press,2006:359(in Chinese)
[10]黄闽宗,吴有章,谢圣平.电液复合泵浦气隙油膜效应模拟分析[J].机械月刊,2005,31(8):143-150Huang Minzong,Wu Youzhang,Xie Shengping.Simulation andanalysis on electro-hydraulic pump air gap film effect[J].Machinery Monthly,2005,31(8):143-150(in Chinese)
[11]冀宏,孙磊,王峥嵘,等.液压电机泵中浸油电机的负载效应[J].兰州理工大学学报,2009,35(4):52-56Ji Hong,Sun Lei,Wang Zhengrong,et al.Load effect of electromotor of hydraulic electro-motor pump[J].Journal of Lanzhou University of Technology,2009,35(4):52-56(in Chinese)
[12]张斌.轴向柱塞泵的虚拟样机及油膜压力特性研究[D].杭州:浙江大学,2009:54Zhang Bin.Study on virtual prototype and pressure characteristics of oil film for axial piston pump[D].Hangzhou:Zhejiang University,2009:54(in Chinese)
[13]许耀铭.油膜理论和液压泵和马达的摩擦副设计[M].北京:机械工业出版社,1987:140Xu Yaoming.Film theory and friction design of hydraulic pumps and motors[M].Beijing:Machinery Industry Press,1987:140(in Chinese)
[14]黄坚,郭中醒.实用电机设计计算手册[M].上海:上海科学技术出版社,2010:291-319Huang Jian,Guo Zhongxing.Practical manual for motor calculation and design[M].Shanghai:Shanghai Science and Technology Press,2010:291-319(in Chinese)
[15]王益群,高殿荣.液压工程师技术手册[M].北京:化学工业出版社,2010:140-164Wang Yiqun,Gao Dianrong.Technical manual for hydraulic engineers[M].Beijing:Chemical Industry Press,2010:140-164(in Chinese)
[2]Fu Y L,Li Z F,Zhang P,et al.Mechanical and hydraulic joint modeling and simulation about elec-pump[J].Advanced Materials Research,2013,694-697:614-620
[3]Leslie M C,Robert C H.Integrated electric motor driven in line hydraulic pump:USA,5708311[P].1998-01-13
[4]Allan A V.Integrated motor pump combination:USA,4850812[P].1989-07-25
[5]Kazunori K,Masaaki S.Masahito H.Fluid pressure generating device:USA,5591013[P].1997-01-07
[6]Franz A,Gunther N.Motor driven pump unit:USA,US2004/0136847 A1[P].2004-07-15
[7]Gerd H,Franz A.Motor-pump unit:USA,US7381036 B2[P].2008-06-03
[8]付永领,安高成,李祝锋,等.一种永磁伺服内啮合齿轮式电液泵:中国,201320327018.3[P].2013-09-29Fu Yongling,An Gaocheng,Li Zhufeng,et al.Permanent magnet servo internal gear electro-hydaulic pump:China,201320327018.3[P].2013-09-29(in Chinese)
[9]刘锦波,张承慧.电机与拖动[M].北京:清华大学出版社,2006:359Liu Jinbo,Zhang Chenghui.Electric machinery and electric drives[M].Beijing:Tsinghua University Press,2006:359(in Chinese)
[10]黄闽宗,吴有章,谢圣平.电液复合泵浦气隙油膜效应模拟分析[J].机械月刊,2005,31(8):143-150Huang Minzong,Wu Youzhang,Xie Shengping.Simulation andanalysis on electro-hydraulic pump air gap film effect[J].Machinery Monthly,2005,31(8):143-150(in Chinese)
[11]冀宏,孙磊,王峥嵘,等.液压电机泵中浸油电机的负载效应[J].兰州理工大学学报,2009,35(4):52-56Ji Hong,Sun Lei,Wang Zhengrong,et al.Load effect of electromotor of hydraulic electro-motor pump[J].Journal of Lanzhou University of Technology,2009,35(4):52-56(in Chinese)
[12]张斌.轴向柱塞泵的虚拟样机及油膜压力特性研究[D].杭州:浙江大学,2009:54Zhang Bin.Study on virtual prototype and pressure characteristics of oil film for axial piston pump[D].Hangzhou:Zhejiang University,2009:54(in Chinese)
[13]许耀铭.油膜理论和液压泵和马达的摩擦副设计[M].北京:机械工业出版社,1987:140Xu Yaoming.Film theory and friction design of hydraulic pumps and motors[M].Beijing:Machinery Industry Press,1987:140(in Chinese)
[14]黄坚,郭中醒.实用电机设计计算手册[M].上海:上海科学技术出版社,2010:291-319Huang Jian,Guo Zhongxing.Practical manual for motor calculation and design[M].Shanghai:Shanghai Science and Technology Press,2010:291-319(in Chinese)
[15]王益群,高殿荣.液压工程师技术手册[M].北京:化学工业出版社,2010:140-164Wang Yiqun,Gao Dianrong.Technical manual for hydraulic engineers[M].Beijing:Chemical Industry Press,2010:140-164(in Chinese)