石油炼制与化工
石油煉製與化工
석유련제여화공
PETROLEUM PROCESSING AND PETROCHEMICALS
2014年
6期
90-95
,共6页
周维贵%郭小川%蒋明俊%郭婉晴
週維貴%郭小川%蔣明俊%郭婉晴
주유귀%곽소천%장명준%곽완청
锂基润滑脂%触变性%模量%表观黏度%应变幅度
鋰基潤滑脂%觸變性%模量%錶觀黏度%應變幅度
리기윤활지%촉변성%모량%표관점도%응변폭도
lithium lubricating grease%thixotropy%modulus%apparent viscosity%strain amp litude
以12-羟基硬脂酸锂皂稠化剂和矿物润滑基础油制备了锂基润滑脂。考察了基础油黏度、稠化剂含量及温度对锂基润滑脂的触变性、储存模量、应变幅度和表观黏度等流变学参数的影响,并对其影响机理进行了探讨。结果表明:基础油黏度增大,屈服应力先增大后减小,而表观黏度增大,400SN 的锂基润滑脂结构恢复最慢;皂含量增加,锂基润滑脂的屈服应力和表观黏度增大,结构恢复变慢;锂基润滑脂具有线性黏弹区,超过其屈服应力后,出现明显的剪切变稀,达到流动点,表现出黏性流体性质。
以12-羥基硬脂痠鋰皂稠化劑和礦物潤滑基礎油製備瞭鋰基潤滑脂。攷察瞭基礎油黏度、稠化劑含量及溫度對鋰基潤滑脂的觸變性、儲存模量、應變幅度和錶觀黏度等流變學參數的影響,併對其影響機理進行瞭探討。結果錶明:基礎油黏度增大,屈服應力先增大後減小,而錶觀黏度增大,400SN 的鋰基潤滑脂結構恢複最慢;皂含量增加,鋰基潤滑脂的屈服應力和錶觀黏度增大,結構恢複變慢;鋰基潤滑脂具有線性黏彈區,超過其屈服應力後,齣現明顯的剪切變稀,達到流動點,錶現齣黏性流體性質。
이12-간기경지산리조주화제화광물윤활기출유제비료리기윤활지。고찰료기출유점도、주화제함량급온도대리기윤활지적촉변성、저존모량、응변폭도화표관점도등류변학삼수적영향,병대기영향궤리진행료탐토。결과표명:기출유점도증대,굴복응력선증대후감소,이표관점도증대,400SN 적리기윤활지결구회복최만;조함량증가,리기윤활지적굴복응력화표관점도증대,결구회복변만;리기윤활지구유선성점탄구,초과기굴복응력후,출현명현적전절변희,체도류동점,표현출점성류체성질。
In order to study the rheological properties of lithium lubricating grease systematically, the lithium lubricating greases were prepared using 1 2-hydroxy stearic acid lithium soap thickener and mineral lubricating base oil.The influence of base oil viscosity,thickening agent dosage and tempera-ture on the thixotropy of lithium base grease,storage modulus,strain amplitude,the apparent viscosi-ty,and the corresponding mechanisms were examined.The results show that with increase of soap con-tent in lithium lubricating grease,the apparent viscosity increases while the yield stress shows the tend-ency of lowered after first increase.The 400SN lithium grease is the slowest one to restore its original structure,and that the yield stress and apparent viscosity increase with the soap dosage increasing, while the structure recovery rate decreases.Lithium grease possesses a linear sticky play area.Beyond the yield stress,the shear thinning appears.At the flow pour point,the grease shows its viscous flow properties.