Study of The Flow Force on Spool Type Valve

• Main Authors: yi-zhong Lin, 林義忠
• Other Authors: Minter Cheng
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/31542381328492200620

碩士 === 逢甲大學 === 機械工程學所 === 97 === The objective of this research is to investigate the effects of spool configuration and spool opening on spool axial force, three-dimensional flow field inside the valve chamber, flow force, and volume flow rate of a spool type hydraulic control valve. The analysis is carried out by using numerical technique, and a computational fluid dynamic software FLUENT is applied in this study. Three spool configurations, standard spool, bevel spool, and extend surface spool are studied in this research. It is observed that spool axial force and volume flow rate increase as valve opening increases. As valve opens from its closed position, the flow force increases with increasing the valve opening and reaches to its maximum as the valve opening is 1.5 cm. However, the flow force decreases for further increasing the valve opening. For extend surface spool, the spool axial force decreases with increasing extend surface angle when fluid flow from small inlet to large exit, however, the phenomenon is opposite as the flow direction is reversed.