Journal of South China University of Technology (Natural Science Edition) ›› 2014, Vol. 42 ›› Issue (1): 17-21.doi: 10.3969/j.issn.1000-565X.2014.01.004

• Mechanical Engineering • Previous Articles     Next Articles

Calculation and Analysis of Deflection on Piston Rod of Slim Hydraulic Hoist Cylinder

Ding Wen- si Zhang Xu Fan Ya- jun   

  1. School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2013-08-31 Revised:2013-11-11 Online:2014-01-25 Published:2013-12-01
  • Contact: 丁问司(1968-)，男，博士，教授，主要从事机、电、液一体传动与控制研究． E-mail:wsding@scut.edu.cn
  • About author:丁问司(1968-)，男，博士，教授，主要从事机、电、液一体传动与控制研究．
  • Supported by:

    国家自然科学基金资助项目(11272122);广东省 － 教育部产学研重大项目(2012A090300011);广东省高新技术产业开发区发展引导项目(2012B011000031);韶关市科技计划项目(2012CX- G22)

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Abstract:

In this paper,first,the flexural deflections on the cylinder and the piston rod of slim hydraulic hoist arecalculated and analyzed based on an improved ladder pole model,and the effects of some parameters,such as theinstallation angle of the cylinder, the fit clearance between the cylinder and the piston rod, the dead load of the pis-ton rod and the oil mass,on the transverse deformation of the shaft,are taken into consideration. Then,accordingto the basic theory of solid mechanics,the load and deformation of the cylinder and the piston rod are calculated,and an analytical expression describing the deflection on the cylinder and the piston rod is deduced by establishingand solving deflection equations. Finally,an engineering instance is given,and the results show that the proposedmethod is superior to the finite element method because it is of a small calculation error of less than 5%.

Key words: hydraulic equipment, hoist, cylinder, piston rod, deflection, analytical calculation

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