Experimental study on thermal deformation and clamping force characteristics of hydraulic spool valve

doi:10.1016/j.engfailanal.2021.105698

CORC > 兰州理工大学 > 兰州理工大学

	Experimental study on thermal deformation and clamping force characteristics of hydraulic spool valve
	Qian-peng, Chen; Hong, Ji; Hui-hui, Xing; Hong-ke, Zhao
刊名	ENGINEERING FAILURE ANALYSIS
	2021-11
卷号	129
关键词	Hydraulic spool valve Reliability Thermal deformation Clamping force Measurement experiments
ISSN号	1350-6307
DOI	10.1016/j.engfailanal.2021.105698
英文摘要	Spool clamping is an important source of reliability decline and failure of hydraulic machinery. Aiming at the problem of spool clamping caused by thermal deformation, the viscous heating experiment of V-groove spool was carried out to find out the temperature difference between the two; the thermal deformation diameters of the spool and valve body were measured by constant temperature control method; a measuring device was set up to measure the spool clamping force at different temperatures. The results show that the temperature of the spool under the viscous heating is always higher than that of the valve body, the temperature difference can reach 47.5 degrees C or even higher. For the spool valve with 20 mm diameter and unilateral clearance of 7 similar to 20 mu m, the thermal deformation of the spool and valve hole can reach 20 mu m and 41 mu m respectively after the temperature increases from 25 degrees C to 120 degrees C. When the temperature of the valve body is constant, the temperature, thermal deformation and clamping force of the spool are positively correlated. Clamping always occurs under a certain temperature and diameter difference between the spool and valve body, which is related to the machining shape error. The greater the temperature difference between the spool and the valve body, the longer the clamping time, the greater the number of pulsations of the clamping force and the greater the peak value of the clamping force. When the valve body temperature is 25 degrees C, the spool can produce a clamping force of 27.41 N at 95 degrees C, and the clamping force can last for 19.1 s, which would obviously affect the working performance of the construction machinery. This study provides a theoretical reference for the design and production of non-clamping spool valves.
WOS研究方向	Engineering ; Materials Science
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000700587400005
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148638]
专题	兰州理工大学
作者单位	Lanzhou Univ Technol, Energy & Power Engn Dept, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Qian-peng, Chen,Hong, Ji,Hui-hui, Xing,et al. Experimental study on thermal deformation and clamping force characteristics of hydraulic spool valve[J]. ENGINEERING FAILURE ANALYSIS,2021,129.
APA	Qian-peng, Chen,Hong, Ji,Hui-hui, Xing,&Hong-ke, Zhao.(2021).Experimental study on thermal deformation and clamping force characteristics of hydraulic spool valve.ENGINEERING FAILURE ANALYSIS,129.
MLA	Qian-peng, Chen,et al."Experimental study on thermal deformation and clamping force characteristics of hydraulic spool valve".ENGINEERING FAILURE ANALYSIS 129(2021).