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为消除泡沫对液压系统的危害,改善液压液配方消泡性能,预防支架动力不足和确保支架动作的精准性,进行了液压液消泡剂的配型研究。考察了液压液发泡的本质、消泡剂的相容性、消泡性、添加量和持久性;分析了相容性和消泡性的内在原因。试验证明:乳化剂和润滑剂均易引发液压液产生泡沫;消泡剂的添加量以略高于临界胶束浓度(CMC)为优;消泡剂与液压液中添加剂的化学结构相似度越高,相容性越好;不同消泡剂使液压液表面张力降低的程度不同。
In order to eliminate the harm of the foam to the hydraulic system, to improve the defoaming performance of the hydraulic fluid formulation, to prevent the scaffolding motility insufficiency and to ensure the precision of the scaffold movement, the matching research of the hydraulic fluid defoamer was carried out. The nature of hydraulic fluid foaming, compatibility of defoamer, defoaming, adding amount and durability were investigated. The reasons of compatibility and defoaming were analyzed. The experiment proves that both emulsifier and lubricant can easily lead to the formation of foam in the hydraulic fluid. The defoamer dosage is slightly higher than the critical micelle concentration (CMC); the chemical structure similarity between the defoamer and the additive in hydraulic fluid High, better compatibility; different defoamers to reduce the hydraulic fluid surface tension to varying degrees.