摘要:

AbstractThis paper describes a systematic study into the influence of molecular structure on lubricant shear stress in elastohydrodynamic (EHD) contacts. An infrared emission technique has been employed to measure surface temperatures in an EHD contact and thence to determine the shear stress profile of lubricant films therein. The effect of structure on shear stress has been investigated by comparing the behaviour of a range of well‐characterised, closely related, ester base fluids. Considerable variations in shear stress response to EHD conditions have been observed, depending upon the type and structure of the este

ISSN:0265-6582    

DOI:10.1002/jsl.3000090202

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractThe rationale is presented for the development of 315 °C bulk oil high‐temperature hydraulic fluids for future US Air Force systems. Four chemical classes of candidate fluids worthy of consideration are described along with their relative merits and limitations. The four fluids are: mineral oil based MIL‐H‐ 27601A, a synthetic hydrogenated polyalphaolefin, a synthetic silahydrocarbon (tetra alkyl silane), and a linear perjluoropolyalkylether. Questions for consideration in selecting a candidate high‐temperature hydraulic fluid are presented and discussed in relation to the intended specific app

ISSN:0265-6582    

DOI:10.1002/jsl.3000090203

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractPolyol ester lubricants are used in a wide range of temperature conditions, normally from −54 up to +220 °C, and their application can be limited by high temperature oxidation leading to viscosity increase, sludge, and/or formation of deposits. This paper is concerned with the chemical processes which take place during the oxidation of esters, particularly polyol esters, and discusses the selectivity of oxygen attack on ester molecules, and the formation and decomposition of hydroperoxides as well as other products formed as a result of ester oxidation. Proposed mechanisms of polyol ester lubricant oxidation are discussed, and unresolved problems which require additional research efforts are reveal

ISSN:0265-6582    

DOI:10.1002/jsl.3000090204

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractConcern at the amount of lubricants lost in the environment has prompted the search for environmentally considerate lubricants, i.e. lubricants which biodegrade as a result of the biological action of living organisms. Various test procedures and parameters are discussed, and the performance of various lubricants, including synthetics, is presented.

ISSN:0265-6582    

DOI:10.1002/jsl.3000090205

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

ISSN:0265-6582    

DOI:10.1002/jsl.3000090206

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

ISSN:0265-6582    

DOI:10.1002/jsl.3000090207

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

ISSN:0265-6582    

DOI:10.1002/jsl.3000090208

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

ISSN:0265-6582    

DOI:10.1002/jsl.3000090201

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY