添加减阻剂的前混合磨料射流切割性能试验研究

摘要

In order to improve the cutting ability of pre⁃mixed abrasive water jet and the efficiency of emergency repairing, cat⁃ionic polyacrylamide (PAM) and cetyl trimethyl ammonium chloride (CTAC) are used as drag reducing agents and the cutting depth is chosen as the evaluation index to carry out the cutting experiment of X60 steel plate. The results show that:the addition of drag re⁃ducing agent can improve the cutting ability of pre⁃mixed abrasive jet effectively;during the pressure range of 25~40 MPa, the opti⁃mal additive amount of PAM is 20 mg/kg, and the optimum additive amount of CTAC/NaSal is 30 mg/kg;CTAC/NaSal is better than PAM in term of resistance reduction effect; with the addition of CTAC/NaSal, the same cutting depth can still be obtained while pump pressure is reduced by 5 MPa.%为提高前混合磨料射流的切割能力和应急抢修的作业效率，选用阳离子聚丙烯酰胺（PAM）和十六烷三甲基氯化铵（CTAC）作为减阻剂，以切割深度为评价指标，对X60钢板进行切割试验。结果表明：减阻剂的添加能够有效提高前混合磨料射流的切割能力；在压力为25~40 MPa时，PAM的最优添加量为20 mg/kg，CTAC/NaSal的最优添加量为30 mg/kg；CTAC/NaSal的减阻效果优于PAM，添加CTAC/NaSal后泵压调低5 MPa，仍可以获得与无减阻剂时相同的切割深度。