摘要:

AbstractBased on the need to develop indigenous synthetic base greases, the authors' organisation produced candidate greases based on polyesters of adipic acid, thickened with modified bentonites. The formulation and performance of these greases are presented, demonstrating their lubricity and stability characteristics, and conclusions are drawn as to their suitability, according to these characteristics, for various applications, including those in a petroleum‐origin fuel environmen

ISSN:0265-6582    

DOI:10.1002/jsl.3000030202

出版商:John Wiley&Sons, Ltd    

年代:1986

数据来源: WILEY

摘要:

AbstractA formulation study has been carried out to assess the feasibility of developing advanced gas turbine lubricants in the (4 cSt) viscosity range intermediate between current MIL‐L‐7808 and MIL‐L‐23699 lubricants. Using additive technology developed on advanced MIL‐L‐2 7502 oils the authors have formulated several 4 cSt polyol ester base stocks. Eight of the blends thus far tested have shown good to acceptable performance in the Erdco Bearing Rig Test run under MIL‐L‐27502 conditions. Various other key targets of a proposed new specification have been met or clo

ISSN:0265-6582    

DOI:10.1002/jsl.3000030203

出版商:John Wiley&Sons, Ltd    

年代:1986

数据来源: WILEY

摘要:

AbstractThis paper describes the structure and derivation of ‘classical’ silicone fluids, giving the reactions for the production of dimethyl fluids by Miiller‐Rochow synthesis, polymerisation, direct synthesis, hydrosilylation, and transesterification. The properties of siloxanes are described, and the applications of silicone fluids and compounds are discussed in relation to their properties, particularly insolubility in water, viscosity‐temperature characteristics, and dielectric pro

ISSN:0265-6582    

DOI:10.1002/jsl.3000030204

出版商:John Wiley&Sons, Ltd    

年代:1986

数据来源: WILEY

摘要:

AbstractAircraft engines contain gears that have to be lubricated under conditions of high speeds and extremely high temperatures, In this field of application scoring damage can occur. In Europe and partly also in the USA the scoring load capacity of gear oils is expressed in terms of FZG Scoring Load Stage; the FZG Gear Test Rig is described. The normal test procedure A/8.3/90 as standardised in DIN 51 354 using A‐type gears at a pitch line velocity of v = 8.3 m/s and a starting oil temperature of 90°C is presented. A modified procedure at double speed and increased oil temperature A/16.6/140 is discussed. The scoring load capacity of aircraft transmission lubricants is expressed worldwide in Ryder Gear Test results. Because of the high costs and problems with the availability of test gears a modified FZG Ryder Test was developed. The method is presented and comparative results of typical aircraft engine oils in the FZG, the FZG‐Ryder and the original Ryder Gear Test are shown. From this experience it becomes obvious that alternative test methods for the evaluation of scoring load capacity of aircraft transmission lubricants can be available in the near fu

ISSN:0265-6582    

DOI:10.1002/jsl.3000030205

出版商:John Wiley&Sons, Ltd    

年代:1986

数据来源: WILEY

ISSN:0265-6582    

DOI:10.1002/jsl.3000030206

出版商:John Wiley&Sons, Ltd    

年代:1986

数据来源: WILEY

ISSN:0265-6582    

DOI:10.1002/jsl.3000030207

出版商:John Wiley&Sons, Ltd    

年代:1986

数据来源: WILEY

ISSN:0265-6582    

DOI:10.1002/jsl.3000030208

出版商:John Wiley&Sons, Ltd    

年代:1986

数据来源: WILEY

ISSN:0265-6582    

DOI:10.1002/jsl.3000030209

出版商:John Wiley&Sons, Ltd    

年代:1986

数据来源: WILEY

ISSN:0265-6582    

DOI:10.1002/jsl.3000030201

出版商:John Wiley&Sons, Ltd    

年代:1986

数据来源: WILEY