CH447444A - Liquid lubricant - Google Patents

Description

  

  Liquid lubricant Swiss Patent No. 420458 of December 30, 1963 describes a liquid lubricant for gears, in particular for transmissions, gearboxes, motor gear bridges, consisting, per 100 parts by weight of an oil quality mineral from 0.5 to 5 parts of dispersant additives and / or viscosity additives, from 6 to 10 parts of extreme pressure additives, from 0.2 to 15 parts of compound additives, lubricants solids formed from MoS2 and graphite in an amount of 0.2 to 1 part of lybdenum disulphide and 0.02 to 0.05 part of synthetic purity graphite.



  It has now been discovered that the content of dispersant additives and / or viscosity additives can be lower. An example of a lubricant according to the invention is given below
EMI0001.0007
  
     Information on the aforementioned brand products can be found in the aforementioned patent.



  Systematic tests have been carried out in the laboratory; these tests, which were carried out, among others, on four ball machines and on a TIMKEN machine and on the Marine Technical Service test machine, to monitor wear (or cavity diameter for the four ball machine), seizure loads and welding loads have given exceptional results by their qualities.



  In-service tests have also been carried out which have made it possible to observe a) a noticeable reduction in noise, noticeable even for a little exercised ear; to 5 parts and can even go down to 0.2 part, without harming the advantageous properties of the lubricant.



  The present invention therefore relates to a liquid lubricant for gears, characterized in that it essentially contains, for 100 parts by weight of a quality mineral oil, at least 0.2 part, but less than 0.5 part, dispersant additives and / or viscosity additives, 6 to 10 parts of extreme pressure additives, 0.2 to 15 parts of compound additives, solid lubricants formed from MoS2 and graphite at a rate of 0 , 2 to 1 part of molybdenum disulphide and 0.02 to 0.05 part of synthetic purity graphite.

      b) the disappearance of pitting (or the formation of holes) on certain components subjected to heavy loads (in particular screw-type vehicle axles; c) great flexibility of the gearbox: gear change was made more easily, the difference being especially noticeable in extreme cold (-200 to -300 C during the winter of 1962/1963);

    d) the reduction in friction has been demonstrated - by the reduction in the temperatures of the gearboxes measured after identical service (ambient temperature 30 C on the motorway)
EMI0002.0001
  
    oil <SEP> lubricant <SEP> liquid
<tb> extreme <SEP> pressure <SEP> next
<tb> classic <SEP> invention
<tb> <SEP> Peugeot <SEP> 404 <SEP> >> <SEP> 125,) <SEP> C <SEP> 1l5 <SEP> C - by an increase in the efficiency of the gearbox resulting in a gain at top speed.



  These various results clearly confirm the value and the qualities of the lubricant according to the invention.

 

Claims (1)

CLAIM Liquid lubricant for gears, characterized in that it contains essentially, per 100 parts by weight of a quality mineral oil at least 0.2 part, but less than 0.5 part of dispersant additives and / or viscosity additives, from 6 to 10 parts of extreme pressure additives, from 0.2 to 15 parts of compound additives, solid lubricants formed from MoS2 and graphite in a proportion of 0.2 to 1 part of molybdenum disulphide and 0.02 and 0.05 part of synthetic purity graphite.