Lubricants used in various friction units may lose their properties under the influence of high temperatures. In this case, a change in their state of aggregation or decay into separate fractions is observed. The consequences of such a situation are, as a rule, the failure of the mechanical unit. high-temperature lubricants based on various components help to exclude such an option.
Features of different types of greases resistant to high temperatures
The scope of application of high-temperature lubricants depends on the type and type of thickener. For example, one of the popular domestic pastes used in the temperature range from -50 to +400 degrees Celsius - VNIINP 232, contains lithium stearate and molybdenum disulfide in its formulation. Despite the widespread misconception that this lubricant is obsolete, there is no compelling reason to confirm this fact.
Some high temperature greases are used in narrower temperature ranges. For example, TOTAL COPAL EP 00, due to the introduction of an aluminum complex as a thickener, has proven itself well at temperatures up to 150 degrees. It should be noted that lubricants can retain their anti-friction and extreme pressure properties even at higher or lower temperatures. But, as a rule, this operation in this mode is an abnormal situation and if such an event occurs, it must be eliminated as soon as possible.
The use of new components used as thickeners has increased the service life of lubricants up to 10 years. One such example is the TOMFLON XSP 190 grease, which contains polytetrafluoroethylene.
In general, the use of Teflon in lubricants has given them completely new properties. Due to the presence in the composition of PTEF, such greases resist extrusion, washout and shedding under the influence of significant loads. At the same time, the effect of minimizing vibration and reducing noise is observed, as well as reducing resistance during starting loads.
