Bulletin of
Vitebsk State
Technological
University

Abstract

The features of the formation of the structure and properties of the environmentally friendly lubricants (EFL) based on the mixture of the vegetable and mineral oils are investigated. The formulation and technological regimes of the manufacturing of the soap lithium-calcium grease and liquid lubricant were developed using the results of experimental and statistical modeling. It is shown that for the production of the EFL the highly purified oil of group III according to the API standard is advisable to use as the mineral component of the oil composition, that is characterized by high rheological and tribological properties as well as improved environmental qualities. The obtaining method of the environmentally friendly grease with the mixed dispersion medium (the mixture of the rapeseed and mineral group III according to the API standard oils) is described, that allows to reduce the harmful effects of the water and high temperature on the vegetable component of the dispersion medium and to improve the properties of the grease. This grease has higher rheological (temperature dropping point– 180 °С, colloidal stability – 8 %) and tribological (welding load – 1960 N, wear index – 0,46 mm) values than the greases thickened with the single lithium (grease Litol-24) or the single calcium (grease Solidol C) soap. The lubricating oil for the saw chains made from domestic raw materials is developed, that has the parameter similar to the analog oil of the Husqvarna Bio Advanced brand. The biodegradability of the developed environmentally friendly liquid and plastic lubricants is 93 % and 89 % respectively, while the developed EFLs are characterized by high stability (for at least 12 months) of the rheological and tribological properties.

Environmentally Friendly Lubricants Based on the Mixture of the Vegetable and Mineral Oils