排灌机械工程学报
   Home  About Journal  Editorial Board  Author Center  Subscriptions    中文 
Journal of Drainage and Irrigation Machinery Engin  2012, Vol. 30 Issue (2): 147-152    DOI: 10.3969/j.issn.1674-8530.2012.02.005
Current Issue | Next Issue | Archive | Adv Search Previous Articles  |  Next Articles  
Theoretical calculation of axial clearance in medium or high pressure external gear pumps
 LI  Yu-Long, SUN  Fu-Chun
(Industrial Manufacturing College, Chengdu University, Chengdu, Sichuan 610106, China)
 Download: PDF (1741 KB)   HTML (1 KB)   Export: BibTeX | EndNote (RIS)      Supporting Info
Abstract The study on theoretically estimating variable axial clearance in a medium or high pressure external gear pump is rare yet, thus a dynamics model for determining such a clearance was established in the paper based on an analysis on forced acted on a floating axial sleeve (side plate), which consisted of the pressure in squeezed film, the outside compensated forces on the sleeve, the pressure in trapped oil and the working oil pressure. Then variable axial clearances were iteratively estimated from the model in a meshing cycle by using the Runge-Kutta method. Subsequently, an analysis on the influence of compression ratio, different distributions of working oil pressure and trapped oil pressure on the clearance value was conducted. The results show that the axial clearance is about 0.13 mm in all the cases, and it is consistent with the actual value. The greater the total force of oil pressure due to the different distributions of operating oil pressure at the same compression ratio, the smaller the axial clearance. As the other conditions remain unchanged, the higher the compression ratio, the smaller the axial clearance. Moreover the operating oil pressure and compression ratio have a significant impact on the clearance, but the trapped oil pressure just has slight effect on it. Generally, in a medium or high pressure external gear pump the axial clearance really shows less variable, so that the mean value of the variable clearances can be applied in design to simplify subsequent calculations.
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
LI Yu-Long
SUN Fu-Chun
Key wordsexternal gear pumps   axial clearance   floating axial sleeve   axial vibration     
Received: 2011-10-16; Published: 2012-03-30
Cite this article:   
LI Yu-Long,SUN Fu-Chun. Theoretical calculation of axial clearance in medium or high pressure external gear pumps[J]. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(2): 147-152.
 
[1] 参考文献(References)
[2] 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.
[3] Jing Baode,Yang Lijuan,Lu Shuang. The research of contaminant abrasion on external gear pumps [C]//Proceedings of the Control and Decision Conference. Shenyang: Northeastern University Press, 2009: 3090-3093.
[4] Houzeaux G,Codina R.A finite element method for the solution of rotary pumps[J].Computers & Fluids, 2007,36(4):667-679.
[5] 黄健,刘振侠,张丽芬,等.端面间隙对齿轮泵性能影响的数值模拟研究[J].机床与液压, 2011,39(13):36-38.
Huang Jian,Liu Zhenxia,Zhang Lifen,et al. Numerical investigation of the influence of end clearance on the performance of gear pump[J].Machine Tool & Hydraulics, 2011,39(13):36-38.(in Chinese)
[6] 宫柏秋.齿轮泵参数化设计方法研究与系统实现[D].哈尔滨:哈尔滨工业大学机电工程学院,2008.
[7] 王海兰,邵汉强.齿轮泵轴向间隙泄漏与补偿研究[J].军事交通学院学报,2005,7(4):31-33.
Wang Hailan,Shao Hanqiang.Study of axial clearance leakage and compensation of gear pumps [J].Journal of Academy of Military Transportation,2005,7(4):31-33.(in Chinese)
[8] 杨杰.高压齿轮泵轴套轴向浮动性的研究[J].液压与气动,2010 (2):8-10.
[9] Yang Jie.Research of bearings axial floatability for high pressure gear pump[J].Chinese Hydraulics & Pneumatics,2010 (2):8-10.(in Chinese)
[10] Casoli P, Vacca A, Berta G L, et al. A CFD analysis of the flow field in the lateral clearance of external gear pumps[C]∥Proceedings of the 11th Scandinavian International Conference on Fluid Power.Linkoping: Linkoping University Press, 2009:786-794.
[11] Morgridge D, Evans H P, Snidle R W, et al. A study of seal lubrication in an aerospace fuel gear pump including the effects of roughness and mixed lubrication [J]. Tribology Transactions, 2011, 54(4):657-665.
[12] 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.
[13] 温诗铸,黄平.摩擦学原理[M].北京:清华大学出版社,2008.
[14] 李玉龙,许泽银,徐强.齿轮泵补偿面设计的参数化研究[J].农业机械学报,2005,36(8):70-74.
Li Yulong, Xu Zeyin, Xu Qiang.Parameter design of balance area for external gear pump[J].Transactions of the Chinese Society for Agricultural Machinery,2005,36(8):70-74.(in Chinese)
[15] 杨元模,刘朝晖.外啮合齿轮泵抽空现象探究及解决方法[J].液压与气动,2006(12):81-83.
[16] Yang Yuanmo,Liu Chaohui.Probe and solution to empty pumping in outerengaged gear pump[J].Chinese Hydraulics & Pneumatics,2006(12):81-83.(in Chinese)
[17] 李玉龙,孙付春.基于离心作用的齿轮泵容积效率和困油现象分析[J].农业工程学报,2011,27(3):147-151.
Li Yulong,Sun Fuchun.Theoretical analysis of volumetric efficiency and phenomenon of trapped oil under centrifugation in external spurgear pump [J].Transactions of the Chinese Society of Agricultural Engineering,2011,27(3):147-151.(in Chinese)
[18] 李玉龙,孙付春.齿轮泵困油的分析模型及侧隙计算 [J].排灌机械工程学报,2011,29(2):118-122.
Li Yulong,Sun Fuchun.Analysis model on trapped oil and backlash calculation in external gear pump[J].Journal of Drainage and Irrigation Machinery Engineering,2011,29(2):118-122.(in Chinese)
[1] Lin Chao, Hou Yujie,Gong Hai,Zeng Qinglong, Nie Ling. Flow characteristics of high-order ellipse bevel gear pump[J]. Journal of Drainage and Irrigation Machinery Engin, 2011, 29(5): 379-385.
[2] Li Yulong, Sun Fuchun. Analysis model on trapped oil and backlash calculation in external gear pump[J]. Journal of Drainage and Irrigation Machinery Engin, 2011, 29(2): 118-122.
[3] Zhang Weizheng, Yu Shurong, Ding Xuexing, Han Mingjun, Du Zhaonian. Dynamic response of axial vibration and structural optimization for dry gas seal system with spiral groove[J]. Journal of Drainage and Irrigation Machinery Engin, 2010, 28(3): 228-232.
[4] Yuan Danqing,Kang Shibin,Cong Xiaoqing,Liu Mengxian. Finite element analysis on gear tangency stress of straight conjugate internal gear[J]. Journal of Drainage and Irrigation Machinery Engin, 2009, 27(2): 111-114.

Copyright © 2011 Journal of Drainage and Irrigation Machinery Engineering
Support by Beijing Magtech Co.Ltd   E-mail: support@magtech.com.cn