Volume 02 Issue 06-2022
84
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
02
I
SSUE
06
Pages:
84-86
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
OCLC
–
1121105677
METADATA
IF
–
5.582
Publisher:
Oscar Publishing Services
Servi
ABSTRACT
This article examines ways to improve the polishing properties of transmission oils. The operating conditions of gears
are characterized by high loads in the contact zone of the teeth, relatively high speeds of mutual movement of the
rubbing surfaces. The polishing properties of the oils should protect the transmission parts from wear and the
undesirable phenomenon of jamming, abrasion of gears. In complex additives (chlorine, phosphorus, sulfur), sulfide
films prevent bullying, while chloride films, due to their elasticity, reduce wear and energy costs to overcome the
friction force.
KEYWORDS
Transmission oil, gears, transmission, viscosity, polishing properties, additives.
INTRODUCTION
Transmission oil is the "vital basis" of the transmission.
It plays an extremely important role in its durability and
operability.
The operating conditions of gears are characterized by
high loads in the contact zone of the teeth, relatively
high speeds of mutual movement of the rubbing
Research Article
IMPROVING THE POLISHING PROPERTIES OF TRANSMISSION OILS BY
ADDING ADDITIVES
Submission Date:
June 09, 2022,
Accepted Date:
June 19, 2022,
Published Date:
June 30, 2022
Crossref doi:
https://doi.org/10.37547/ajast/Volume02Issue06-13
Alimova Zebo Khamidullaevna
Professor, Tashkent State Transport University, Uzbekistan
Ibrahimov Karimjon
Associate professor, Tashkent State Transport University, Uzbekistan
Turakulov Bahtiyor
Senior lecturer, Tashkent State Transport University, Uzbekistan
Journal
Website:
https://theusajournals.
com/index.php/ajast
Copyright:
Original
content from this work
may be used under the
terms of the creative
commons
attributes
4.0 licence.
Volume 02 Issue 06-2022
85
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
02
I
SSUE
06
Pages:
84-86
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
OCLC
–
1121105677
METADATA
IF
–
5.582
Publisher:
Oscar Publishing Services
Servi
surfaces and significant temperatures in the contact
zone.
Energy losses in the transmission account for up to 20%
of the total power consumption of the car. If 25% of the
so-called useful engine power goes to the transmission
without taking into account losses, then in the general
system of transmission units due to their own losses in
the units, this power transmitted to the driving wheels
is reduced to 12%.
Transmission oils should, on the one hand, maintain
high viscosity at operating temperatures so that the
film does not collapse and the gaps are normally
sealed, and on the other hand, do not become too
viscous so that at the beginning of the mechanism,
cold oil in the unit would not interfere with the free
rotation of the gears.
RESEARCH ANALYSIS
The time of oil ingress into the oil channels of the
gearbox bearings and drive axles significantly depends
on both the viscosity of the oil and its temperature.
The polishing properties of the oil are the ability of
individual elements of the lubricant to interact with
metals and at the same time form new substances that
differ in mechanical properties from the base metal. To
form a polishing film on metal, chemically active
substances phosphorus, sulfur, chlorine, etc. are
needed. However, there are no such components in
transmission oils. They are introduced with additives
that have polishing properties. As a result of the
chemical interaction of these substances with the
metal surface, new products are formed, characterized
by a lower melting point and an increase in plasticity.
For example, sulfur forms metal sulfides. The melting
point of iron sulfide is 350 °C lower than the melting
point of iron, and iron phosphide is 515 °C. The flow of
the alloy at the points of contact produces chemical
polishing of the surface, as a result of which the
specific pressure and temperature decrease.
The combination of wedging and polishing action is
especially effective when the effect of chemical
polishing agents and polar substances with long chains
is simultaneously manifested. This circumstance is a
consequence of the formation of an adsorbed film of
polar substances on a chemically polished surface.
Currently, substances containing sulfur, chlorine,
phosphorus in one combination or another are used as
polishing additives - all of them are capable of giving
compounds with metals with more favorable
antifriction properties.
Under conditions of increased loads and temperatures,
sulfur-containing compounds: sulfides, polysulfides of
the compound interact with metal. When the
temperature rises, the iron sulfide film, which has a
lower melting point than the base, melts and is an
additional lubricant that prevents wear and tear.
The adsorption layer, getting into the microcracks of a
solid, quickly spreads deep into the crack and has a
significant wedging effect on the walls, contributing to
the destruction of the surface layers.
We conducted a study of samples of industrial oils, and
samples with the addition of XFS-9 additives, which
perform a polishing and extreme pressure function.
It is believed that the process of chemisorption of the
additive on the metal plays an independent positive
role, also in severe friction modes.
Transmission oils 85W-140 and additive XFS-9 (1-8%)
were selected as the object of the study. To conduct
experiments, the oils with the additive were analyzed
according
to
physico-chemical
parameters
in
accordance with the requirements and norms. The test
results of transmission oils with an additive are shown
in Table 1.
Volume 02 Issue 06-2022
86
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
02
I
SSUE
06
Pages:
84-86
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
OCLC
–
1121105677
METADATA
IF
–
5.582
Publisher:
Oscar Publishing Services
Servi
Test results of transmission oils 85W-140
with XFS-9 additive
(chlorine 2.8%, phosphorus 2.5%, sulfur 3.7%)
Quality indicators
Additive Content - XFS-9, %
1
2
3
4
5
6
7
8
Viscosity, mm2/s at
t=100
о
C
14
14,2
14,4
14,6
14,8
15,6
16,8
17,2
Polishing properties,%
10
12
14
16
18
20
22
25
CONCLUSIONS
From the results of the analysis, we selected the
additive content of 5% X FS9, which shows the optimal
viscosity value. With a further increase in the
concentration, the viscosity increases greatly, which
can lead to increased friction losses.
REFERENCES
1.
Kuzmin N.A. Scientific foundations of the
processes of technical change
the condition of cars. Monograph, N.Novgorod,
NSTU, 2012. -270s.
2.
Abdurakhmanov A.A. Improvement of the system
for cleaning working fluids of hydromechanical
transmissions of cars in order to improve their
operational properties: Diss. Candidate of
Technical Sciences, Tashkent, 1993. 158s.
3.
Alimova Zebo Khamidullaevna, & Sobirova
Dilorom Kobulovna. (2022). Development of
Technology for the Production of Grease Based on
Local and Secondary Raw Materials. Texas Journal
of Engineering and Technology, 7, 5–7.
4.
Khamidullayeva, A. Z., & Narinbaevna, I. M. (2021).
Improving the Lubricating Properties of Gear Oils
Used in Agricultural Machinery by Adding
Additives. Design Engineering, 4197-4204.
5.
Alimova,
Z.
K.,
Makhamajanov,
M.,
Akhmatjanovich, I., & Magdiev, K. I. (2021).
6.
Research Of Anti-Corrosion Properties Of Engine
Oils When The Engine Is Running. The American
Journal of Agriculture and Biomedical Engineering,
3(11), 28-33.
7.
Alimova, Z. X., Ibragimov, K. I., & Turakulov, B. H.
(2022). The influence of the operational properties
of the working fluid on the reliability of
hydromechanical transmissions of cars. The
American Journal of Interdisciplinary Innovations
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