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Analysis model on trapped oil and backlash calculation in external gear pump |
Li Yulong, Sun Fuchun |
(Industrial Manufacturing College, Chengdu University, Chengdu, Sichuan 610106, China) |
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Abstract In order to resolve bigger errors in the current method applied to calculate backlash in external gear pumps, based on analyzing the impact of backlash and relief groove on trapped oil pressure and requiredbacklash, by the calculation of trapped volume and change rate of trapped volume and two majorleakage rates from trapped oil area through opening of relief groove and gap of backlash, a simple analysis model on trapped oil was established. By simulation of the maximum peak of trapped pressure, the accuratecalculation method was given to determine the reasonable backlash, and all results of backlash affected by working parameters were compared with that tested from existed literature. The results show that the established trapped oil model and calculated backlash are reliable, the effect of the air mixed in trapped oil and the outlet pressure on the select of backlash value can be ignored, but the rotate speed of pump has a greater effect on the select of backlash, in both combinations of narrow space distance of two relief grooves with small backlash and wide space distance of two relief grooves with small backlash, the former combination should be used preferentially. The accurate calculation of backlash value is proved to be a viable option for the design of the external gear pump.
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Received: 26 June 2010
Published: 30 March 2011
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[1]臧克江,周 欣,顾立志,等.降低齿轮泵困油压力新方法的研究[J].中国机械工程,2004,15(7):579-582.Zang Kejiang,Zhou Xin,Gu Lizhi,et al. Study on new method of reducing the trap pressure of gear pump [J]. China Mechanical Engineering ,2004,15(7):579-582.(in Chinese)[2]Strasser W. CFD investigation of gear pump mixing using deforming/agglomerating mesh[J]. Journal of Fluids Engineering ,2007,129(4):476-484.[3]Mucchi E,Rivola A.Influence of design and operational parameters on the dynamic behavior of gear pump[C]∥ Proceedings of the 14th International Congress on Sound Vibration .Cairns:IIAV and AAS,2007:9-12.[4]Borghi M,Paltrinieri F,Milani M,et al. The influence of cavitation and areation on gear pumps and motors meshingvolumes pressures[C]∥ Proceedings of the 2006 ASME International Mechanical Engineering Congress and Exposition . Chicago: ASME, 2006: 475-483.[5]Eaton M,Keogh P S,Edge K A. The modeling,prediction and experimental evaluation of gear pump meshing pressures with particular reference to aero engine fuel pumps[J]. Journal of Systems and Control Engineering ,2008,220 (5):365-379.[6]李玉龙,刘 焜.外啮合齿轮泵动态困油模型及其参数影响分析[J].农业机械学报,2009,40(9):214-219.Li Yulong,Liu Kun.Dynamic model of trapped oil and effect of related variables on trapped oil pressure in external spur gear pump[J]. Transactions of the Chinese Society for Agricultural Machinery ,2009,40(9):214-219.(in Chinese)[7]李玉龙.外啮合齿轮泵困油机理、模型及试验研究[D].合肥:合肥工业大学机械与汽车工程学院,2009.[8]河北远东泵业有限公司.怎样检查齿轮泵齿轮啮合状况[EB/OL].[2009-10-30].http:∥www.chilunbeng.org/Information/Info show.asp.[9]Dalpiaz G,Fernandez D A,Mucchi E. Modeling meshing phenomena in gear pumps[C]∥ Proceedings of the 2004 International Conference on Noise and Vibration Engineering, ISMA .Leuven,Belgium:Katholieke Universiteit Leuven,2004:949-963.[10]李玉龙,刘 焜.外啮合齿轮泵困油面积和卸荷面积计算式的建立[J].农业机械学报,2009,40(6):203-207.Li Yulong,Liu Kun.Established formulas for trapped oil area and relief load area of external spur gear pump [J]. Transactions of the Chinese Society for Agricultural Machinery ,2009,40(6):203-207.(in Chinese) |
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