液压支架用浓缩液凝结后复原性能研究

Research on Recovery Performance after Freeze of Concentrate Fluid for Hydraulic Support

针对水基液压液冬季凝结后复原慢的问题,从产品配方的角度,考察了降凝剂、无机盐缓蚀剂、乳化剂、缓冲剂和分散剂对试样凝结后复原时间的影响。试样在-25℃环境下凝结后,测定了试样在室温(18±2℃)、5℃和-5℃环境中的复原时间。从不同类型添加剂的化学结构和添加剂间相互作用关系的角度,对复原能力的差异性进行分析阐述,确定了能够快速提升试样复原能力的方法。实验表明:分散剂和乳化剂能够有效缩短试样凝结后的复原时间;随着添加量的增加,复原时间均呈阶梯状的下降;室温较-5℃更有利于凝结之后的复原。在水基液压液配方设计时,合理控制分散剂和乳化剂的添加量有利于产品在冬季快速复原。

Aiming at the problem of the slow recovery of water-based hydraulic fluid after freeze in winter, from the perspective of product formulation, the effects of pour point depressants, inorganic salt corrosion inhibitors, emulsifiers, buffers and dispersants on the recovery time of samples after freeze were investigated. After the sample was frozen at-25 ℃, the recovery time of the sample at room temperature(18±2 ℃), 5 ℃ and ﹣5 ℃ was measured. From the perspective of the chemical structure of different types of additives and the interaction relationship between additives, the difference of recovery ability was analyzed and explained, and the method that can quickly improve the recovery ability of the sample was determined. Experiments show that the dispersant and emulsifier can effectively shorten the recovery time after the sample was frozen. With the increase in the amount of addition, the recovery time decreases in a step-like manner. The room temperature is more conducive to the recovery after freeze than-5 ℃. When design water-based hydraulic fluid formulations, reasonable control of the amount of dispersant and emulsifier added is conducive to the rapid recovery of the product in winter.