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1.
水-乙二醇液压液极压抗磨添加剂二聚酸钾的研究   总被引:3,自引:0,他引:3  
本对合成的一种应用于水-乙二醇液压液的极压抗磨添加剂二聚酸钾进行了润滑性能测试和抗磨作用机理研究.四球实验表明,二聚酸钾的水溶性能和抗磨性能优于水溶性改性ZDDP和Lubrizol5642,以二聚酸钾作为极压抗磨添加剂的水-乙二醇液压液KGY的润滑性能与N46抗磨液压油相当。钢球磨斑表面元素EDS分析表明,在极压条件下,二聚酸钾与摩擦表面发生某种摩擦化学反应,形成了一层有机类抗磨膜。  相似文献
2.
有机钼复合添加剂摩擦磨损性能的研究   总被引:2,自引:0,他引:2  
以合成的有机钼与碱性石油磺酸钙按一定的配比,制备了复合添加剂加入到基础润滑油中,在四球摩擦试验机上测试了其摩擦磨损性能。结果表明,这种复合添加剂可使基础油的摩擦系数显著降低,可较大地提高基础油的承载能力和抗磨损性能,并有效地抑制温升。  相似文献
3.
低硫柴油润滑性的研究   总被引:2,自引:0,他引:2  
探讨了低硫柴油燃料的润滑性和活性抗磨添加剂。低硫柴油抗磨性能既取决于含氧、含氮极性物质,又随粘度增加线性提高。醇、醚、酯、羧酸以及酰胺等化合物均具有一定的抗磨性能,脂肪酸和酯性能比较突出,且与结构类型有关,其中长链脂肪酸单脂抗磨性能最为优越。  相似文献
4.
Carbon nano-onions have better tribological properties than graphite powder when used as additives dispersed in a poly-alpha-olefin base oil. Carbon nano-onions give a better dispersion in the liquid base oil due to their nanometre-scale size. In particular, the anti-wear efficiency of carbon onions under boundary lubrication and mild wear regime is much better than that of graphite powder. This effect can be attributed to the different structure of the carbon layers in the two species. High-resolution transmission electron microscopy and electron energy-loss spectroscopy were used to characterize the carbon samples, and significant differences in the carbon layer spacing and the density were shown. Wear debris were also observed by the same techniques. In the tribofilm material we depicted new chemical and crystal nano-structures species similar to some microstructures observed in chondrite meteorites, the most interesting one being maghemite iron oxide. The origin of the low friction and wear is still largely unknown.  相似文献
5.
Various synthetic esters are widely applied as lubricating fluid to reduce friction and wear at tribological contact. Among them low viscous synthetic esters are expected to improve fuel efficiency by minimizing the fluid friction. These low viscous esters are composed of short-chain fatty acids. Therefore, low viscous synthetic esters are inherently polar molecules. Since efficiency of anti-wear additives decreases with increase of polarity of the base oil, new additive technology is requested.In this work, hydroxyalkyl phosphates [P(O)(OCHRCH2OH)3], and hydroxyalkyl phosphonates [P(OH)n(OCHRCH2OH)3−n, where n=1,2] are proposed as novel anti-wear additives for polar synthetic esters. The anti-wear additives are evaluated under the boundary conditions. The additives prevent wear in polar esters, in which conventional anti-wear additives do not work at all. Interestingly, effects of substituent in additive molecule on anti-wear properties are found. Alkyl and aryl derivatives reduce wear remarkably, whereas allyl derivatives exhibit poor results. It is speculated that the anti-wear inefiiciency of allylic compounds is due to auto-oxidation of the additives.A facile preparative method for hydroxyalkyl derivatives characterizes the present additive system. They are prepared in situ by simply mixing phosphonic acid and substituted epoxides. Flexiblity of lubricant design can be made possible by the present additive system.  相似文献
6.
The effects of some anti-wear additives on the friction and wear behaviour of plasma-sprayed Cr2O3 coating were investigated using a block-on-ring tester at ambient conditions. The results show that zinc dialkyldithiophosphate (ZDDP), tricesyl phosphate (TCP) and tributyl phosphate (TBP) significantly reduce the wear of Cr2O3 coating lubricated by paraffin oil. Additive concentrations as well as sliding time have great influence on the wear. The friction coefficient varies slightly with test conditions. The analysis by XPS of worn surfaces indicates that the wear resistance of these additives is due to the formation of tribochemical reaction films by reacting with Cr2O3 coatings.  相似文献
7.
合成了一种水溶性改性抗磨剂壬基酚聚氧乙烯醚磷酸锌配合物(ZnDDP-EO),并对其中间体壬基酚聚氧乙烯醚磷酸酯的合成条件进行了探讨,得出了较佳的合成工艺条件,即:原料摩尔比(OP-10∶P2O5)为(2.0~2.5)∶1.0,反应温度为100℃,反应时间为4~5 h。利用四球试验机考察了水溶性抗磨剂在水中的润滑性能。结果表明,该剂在水中具有优良的承载能力和抗磨减摩性能。Auger电子能谱(AES)的分析显示出该剂的抗磨性能与摩擦表面中存在锌、磷等活性元素有关。  相似文献
8.
通过大量台架试验,提出传动效率是反映蜗轮蜗杆油润滑性能的最重要指标;温升是蜗轮蜗杆油润滑性能优劣的间接反映;抗胶合能力反映出蜗轮蜗杆油的极压特性;配方是影响蜗轮蜗杆油使用性能的决定因素;并提出应用蜗轮蜗杆油的思路.  相似文献
9.
通过对15种不同添加剂配方的试验蜗轮蜗杆油进行传动效率台架评定试验,以考察不同类型、不同含量的极压抗磨剂、油性剂等对蜗杆副传动效率的影响结果.  相似文献
10.
通过对15种不同添加剂配方的试验蜗轮蜗杆油进行胶合承载能力台架评定试验,以考查不同类型、不同含量的极压抗磨剂、油性剂等对蜗轮蜗杆承载能力影响的结果。  相似文献
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