RU2804615C1 - Lubricant composition for undercarriage systems based on rapeseed oil - Google Patents

Abstract

FIELD: lubricants.

SUBSTANCE: invention relates to a lubricating composition for running systems based on rapeseed oil, containing a base oil, an additive package, and a thickener, while rapeseed oil is used as the base oil, and contains “ДФ-11к” and “Т-43” additives as anti-wear, anti-friction, and extreme pressure additives, “ЦИАТИМ-203” lubricant is used as a thickening additive with the following ratio of components by weight: “ДФ-11к” - 3.9%; “Т-43” - 4.2%; “ЦИАТИМ-203” - 8.0%; rapeseed oil - up to 100%.

EFFECT: increased reliability due to reduced wear of friction pairs of running systems of agricultural machinery and improved environmental performance.

1 cl, 1 dwg, 1 tbl

Description

The claimed technical solution relates to lubricant compositions based on vegetable oils and can be used in running systems of agricultural machinery.

Lubricants for running systems of agricultural machinery based on petroleum and synthetic oils are known [1].

The disadvantage of such lubricants is that due to the low biodegradability of mineral oils and lubricants, they are one of the main sources of environmental pollution.

There are known lubricant compositions used for lubrication of components and mechanisms of agricultural machinery, containing vegetable oils as a base [2, 3]. However, the use of these lubricant compositions in running systems of agricultural machinery is not possible due to their physicochemical and tribological characteristics.

The closest analogue in technical essence to the claimed lubricant composition is TEP-15 (T-2-18) oil [4], which is used in friction units of wheeled and tracked vehicles and contains a mixture of mineral oils as a base. The disadvantage of the above oil is the relatively low anti-wear and anti-friction properties of the base oil, which leads to increased wear of parts. In addition, with inevitable leaks from components of the running systems of agricultural machinery during the use of oil, soil contamination with ecotoxic products occurs.

The objective of the proposed technical solution is to create a lubricant composition for running systems based on rapeseed oil with the required anti-wear, anti-friction and extreme pressure properties, ensuring increased reliability by reducing wear of friction pairs of running systems of agricultural machinery and improving the environmental performance of their operation.

The solution to the problem is achieved by replacing a lubricant based on mineral oils with a lubricant composition based on rapeseed oil, containing as anti-wear, anti-friction and extreme pressure additives: DF-11k and T-43 additives, as a thickening additive, CIATIM-203 lubricant, with the following ratio components by weight: DF-11k - 3.9%; T-43 - 4.2%; CIATIM-203 - 8.0%; rapeseed oil - up to 100%.

Additive DF-11k is an additive based on zinc dialkyldithiophosphates (TU 0257-103-40065452-2007), additive T-43 is a package of additives for transmission oils (TU 0257-002-40065452-97), CIATIM-203 is a lubricant based on mineral oil (GOST 8773-73).

The claimed lubricant composition for running systems based on rapeseed oil was prepared as follows. Additives DF-11k - 3.9%, T-43 - 4.2% and CIATIM-203 - 8% by weight were added to the prepared technical rapeseed oil, the mixture was heated to 200°C and constantly stirred for 1 hour. The resulting lubricant composition was slowly cooled to a temperature of 40°C and homogenized.

Experimental studies of lubricant samples were carried out on a four-ball friction machine MAST-1 and a roller friction machine 2070 SMT-1. In this case, the following parameters were determined: wear scar diameter, roller wear rate, mass roller wear, friction torque and time to scuffing. Research to optimize the content of additives for various purposes in the base oil to form a lubricant composition based on rapeseed oil for running systems of agricultural machinery was carried out according to the method of a full factorial experiment 3 ² . When conducting research on MAST-1, the wear scar diameter values were determined at various additive concentrations. The research results showed that the wear scar diameter decreases with increasing concentrations of DF-11k and T-43 additives and reaches a minimum value when 3.9% DF-11k additive and 4.2% T-43 additive are added to rapeseed oil. Further comparative studies of commercial lubricant and rapeseed oil with and without additives (Fig. 1) showed that adding DF-11k and T-43 additives to rapeseed oil in the above concentrations can reduce wear by 1.42 times compared with mineral lubricant and 1.55 times compared to pure rapeseed oil.

The results of a full factorial experiment on a MAST-1 type friction machine made it possible to determine the optimal concentrations of additives and use the obtained data for further optimization of the developed lubricant composition.

Next, studies were carried out on an SMT-1 machine in order to determine the dependence of the wear rate of the samples on the viscosity of the lubricant composition. CIATIM-203 lubricant was used as a thickening component, the concentration of which varied from 0 to 8% in increments of 4%. Based on the results of studies conducted using the method of a full factorial experiment, it was found that increasing the viscosity of a lubricant composition based on rapeseed oil and DF-11k and T-43 additives by adding CIATIM-203 lubricant to it in an amount of 4% contributed to a reduction in roller wear by 6%, and adding 8% CIATIM-203 lubricant - by 15%. The decrease in wear rate can be explained by an increase in the thickness of the lubricant layer in contact, caused by an increase in the viscosity of the lubricant composition. Thus, it is advisable to increase the viscosity of the lubricant composition by adding 8% CIATIM-203 lubricant to its composition.

Next, to evaluate the properties of the resulting lubricant composition based on rapeseed oil in comparison with other lubricants, comparative studies were carried out on an SMT-1 friction machine.

Wear studies showed (Table 1) that for the developed lubricant composition, wear of the samples is 3.4% lower compared to mineral lubricant and 14.4% lower compared to pure rapeseed oil. The contact temperature decreased by 12.7% compared to samples running on pure rapeseed oil, and was at the level of a mineral lubricant. In addition, it was found that the introduction of an additive complex and an increase in viscosity help reduce the friction torque by 24.4% and increase the time to pre-scuff condition by 97 s compared to pure rapeseed oil. Compared to a commercial mineral lubricant, the friction torque decreased by 8.8%, and the time to pre-scuff condition increased by 1 s.

Table 1
Results of comparative studies of lubricants on a roller friction machine Indicators Tep-15
(TM-2-18) Rapeseed oil 83.9% rapeseed oil
+ 3.9% DF-11k
+ 4.2% T-43
+ 8% CIATIM-203 Massive roller wear, mg 26.4 29.8 25.5 Friction moment, N⋅m 3.4 4.1 3.1 Temperature in the contact zone, °C 70 79 69 Time to pre-scuff state, s 263 167 264

Thus, the developed lubricating composition based on rapeseed oil meets the requirements for multi-purpose gear oils, reduces wear of friction pairs of running systems of agricultural machinery and improves the environmental performance of their operation.

Information sources

1. Mang, T. Lubricants. Production, application, properties / T. Mang. - St. Petersburg: Profession, 2010. - 956 p.

2. Patent No. 2760456 C1 Russian Federation, IPC C10M 169/04 (2006.01), C10M 101/00 (2006.01), C10M 155/02 (2006.01), C10M 137/10 (2006.01), C10N 30/06 (2006.01), C10N 40/08 (2006.01). Lubricant composition for hydraulic systems of agricultural machinery: No. 2021112134: application. 04/28/2021: publ.: 11/25/2021 / Volodko O.S., Bychenin A.P., Bazhutov D.N.; applicant Samara State Agrarian University. - 7 p.: ill. - Text: immediate.

3. Patent No. 2341555. Russian Federation, IPC C10M 169/04 (2006.01), C10M 101/00 (2006.01), C10M 129/10 (2006.01), C10M 143/06 (2006.01), C10M 155/02 (2006.01). Lubricant composition: No. 2007121290/04: appl. 06.06.2007: publ.: 12.20.2008 / Edukov D.A., Boldashev G.I.; applicant Samara regional organization VOIR. - 7 p.: ill. - Text: immediate.

4. GOST 23652-79 Transmission oils. Specifications [Text]. - M.: Standartinform, 2011. - 13 p.

Claims (1)

A lubricating composition for running systems based on rapeseed oil, containing a base oil, an additive package and a thickener, characterized in that rapeseed oil is used as a base oil, contains as anti-wear, anti-friction and extreme pressure additives: DF-11k and T-43 additives, in as a thickening additive, CIATIM-203 lubricant with the following ratio of components by weight: DF-11k - 3.9%; T-43 – 4.2%; CIATIM-203 – 8.0%; rapeseed oil – up to 100%.