Experimental study on artificial liquid nitrogen cooling process for valve seat rings during pressure fitting
GUO Chunhua
LIU Yuxin
MA Wei
QU Changming
Abstract：In response to the problem that no time basis for cooling and assembling during the valve seat ring being manually pressed with liquid nitrogen cooling technology,experiments are conducted on the outer diameter shrinkage of the valve seat ring during liquid nitrogen cooling and the outer diameter recovery at room temperature.The results show that the optimal cooling time for the valve seat ring is 10 minutes,ensuring a clearance fit between the valve seat ring and the bottom hole of the seat ring;the valve seat ring needs to be assembled within 1 minute after being removed from liquid nitrogen to ensure a transitional fit between the valve seat ring and the bottom hole of the seat ring,the quality of valve seat ring pressing can be improved.
Keywords：valve seatliquid nitrogencooling processtime
Publication Date：2023-12-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：4( 111-114 )