Comparative study on corrosion resistance and lubrication function of lithium complex grease and polyurea grease

Ren, Guanlin; Zhang, Pengfei; Ye, Xiangyuan; Li, Wen; Fan, Xiaoqiang; Zhu, Minhao

doi:10.1007/s40544-019-0325-z

Cited by 28 publications

(8 citation statements)

References 33 publications

(28 reference statements)

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“…In the last section, the problems about friction and lubrication failures of wind turbine bearings were discussed and analyzed. For decreasing bearing failure problems, it is highly meaningful to improve lubrication technologies for assuring stable operation and longer service life of wind turbine equipment [ 115 , 116 , 117 ]. Better lubrication not only protects the rolling element and the bearing itself by reducing friction, but also avoids corrosion and damage caused by the external environment [ 118 , 119 ].…”

Section: Research On Bearings Lubrication Technology Of Wind Turbinementioning

confidence: 99%

Review of Tribological Failure Analysis and Lubrication Technology Research of Wind Power Bearings

et al. 2022

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Wind power, being a recyclable and renewable resource, makes for a sizable portion of the new energy generation sector. Nonetheless, the wind energy industry is experiencing early failure of important components of wind turbines, with the majority of these issues also involving wind power bearings. Bearing dependability is directly tied to the transmission efficiency and work performance of wind turbines as one of its major components. The majority of wind turbine failures are due to bearings, and the vast majority of bearing failures are due to lubrication. The topic of improving the accuracy and life of wind power bearing motion is becoming increasingly essential as the wind power industry develops rapidly. This study examines the various constructions and types of wind turbines, as well as their bearings. We also examined the most typical causes of friction and lubrication failure. Furthermore, contemporary research on wind turbine bearings has been compiled, which mostly comprises the study and development of lubrication technology and other areas. Finally, a conclusion and outlook on current challenges, as well as future research directions, are offered.

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Section: Research On Bearings Lubrication Technology Of Wind Turbinementioning

confidence: 99%

Review of Tribological Failure Analysis and Lubrication Technology Research of Wind Power Bearings

et al. 2022

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“…Ren et al performed a comparative study between lithium‐complex and PU greases regarding their corrosion resistance and lubrication performance. It was shown that for certain base oil (PAO or 500SN Mineral Oil) and thickener (PU or lithium complex) mixture proportions, PU‐based grease mixtures displayed a superior physicochemical and lubrication performance as compared to the lithium complex grease mixtures thus creating a multi‐functional lubricant for extreme conditions 30 …”

Section: Application Of Greases In Ev Industry and Current Challengesmentioning

confidence: 99%

Latest developments in designing advanced lubricants and greases for electric vehicles—An overview

Shah¹,

Gashi²,

Rosenkranz

2022

Lubrication Science

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According to the Environmental Protection Agency, transportation is the largest contributor of greenhouse gas emissions (28% of total emissions). Electric vehicles have remarkably grown in popularity and represent a greener future for the automotive industry. This growth has prompted lubricant and grease technology to adapt to an entirely new environment, which is exposed to new factors including external electric currents/fields and extreme temperatures and pressures originating from electric motors and power electronics. Consequently, novel lubricants and greases need to be developed and explored to ultimately improve fuel efficiency and performance. Nano-additives have offered exceptional opportunities to enhance electrical, thermal and tribological properties of the lubricants and greases used. It is thus vital to fully explore and understand the effects of nanoparticles' addition to lubricants and greases, as well as the mechanisms by which improvements are obtained. This perspective summarises the recent trends of developing lubricants and greases for electric vehicles.

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“…The dependence of the structure and properties of the polymer greases on the concentration of lithium stearate was established. Also, the scientific works of the authors [9][10][11][12] are devoted to various aspects of the use of greases in technical applications. At the same time, the analysis of studies has shown that little attention has been paid to the study of the deformation properties of greases under various conditions of tribological contact.…”

Section: Literatuter Reviewmentioning

confidence: 99%

Determination of the dynamic hardness of greases as a characteristic of deformation properties in a tribocontact

Dykha

Staryi

Dytyniuk

et al. 2022

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The efficiency of plastic oil is determined by the duration of its retention on the surface. Evaluation of the effectiveness of plastic lubricants depends on their mechanical properties. It is proposed to use the dependence of hardness on time when pressing a spherical indenter as one of the basic characteristics of the mechanical properties of plastic oils. The method of determining the function of oil hardness is based on the mechanics of contact interaction of a solid ball and a plane presented in this work, which has the property of creep according to the flow theory. One of the main methods of testing the deformation properties of plastic lubricants is to determine the number of penetrations. The number of oil penetrations is determined by the depth of indentation of the indenter; more informative for such a process is the ultimate pressure (hardness), which actually reflects the phenomenon of resistance to indenter indentation in the material. For uniform distribution of pressure under a spherical indenter the technique of construction of function of dynamic hardness of plastic materials is defined and on the basis of tests results of construction of dynamic hardness are received. Tests on contact creep of plastic lubricants are carried out, functions of dynamic hardness are received and the analysis of influence of character of change of dynamic hardness on wear processes in the presence of lubricants is carried out. To analyze the influence of deformation properties on the tribological properties of lubricants, comparative tests of the two above-mentioned types of lubricants on a four-ball friction device were performed. It was found that Litol-24 oil has the best wear resistance. The nonlinear period of running-in for this oil is practically absent that, obviously, under the given conditions of tests is connected with more stable in time deformation properties.

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Comparative study on corrosion resistance and lubrication function of lithium complex grease and polyurea grease

Cited by 28 publications

References 33 publications

Review of Tribological Failure Analysis and Lubrication Technology Research of Wind Power Bearings

Review of Tribological Failure Analysis and Lubrication Technology Research of Wind Power Bearings

Latest developments in designing advanced lubricants and greases for electric vehicles—An overview

Determination of the dynamic hardness of greases as a characteristic of deformation properties in a tribocontact

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