Education of the republic of uzbekistan tashkent state technical university named after islam karimov

Mechanical Engineering
237 
Prof. A. A. Experimental studies conducted by Rengevich on mine electric locomotives 
operating in both coal and ore mines 
0

(the latter have high values of) provided the basis for the 
following rules that determine the characteristics of the coupling [18]. 
1. The description of the coupling is expressed in the form of two curved lines with 
intersecting points at the point with the following coordinates 
А



0
and 
A
u
u

0
.
2.
Speed 
const
сек
м
u


/
1
,
0
0
. 
3. Adhesion characteristic stiffness 
0
0
016
,
0
7
,
0
10
03
,
0






, (сек/м) (4) 
According to the formula, 
1
,
0
0


when 
0


we have, and this 

corresponds to an 
enlargement in the full slip zone. 
CONCLUSION. 
In conclusion, the analysis of the methods for determining the coefficient of 
adhesion between the wheel and the rails, which affects the torsional vibrations in the traction 
transmissions of mainline locomotives, shows that Prof. A. A. The methodology of 
measurements adopted in Rengevich's research is N. N. It has less accuracy than the Menshutin 
method. 
The increase in the coefficient of adhesion in the sliding zone was observed by the candidate 
of technical sciences O. M. It was determined by Janson by testing a model of a mining electric 
locomotive at the Lengrad Mining Institute.
References: 
 
[1]
Faizibaev Sh.S., Mamaev Sh.I. Refinement of the wear assessment model and 
substantiation of the rational profile of locomotive wheelsets. TashIIT Bulletin. 2008. No. 
1. P.33. 
[2]
Faizibaev Sh.S., Avdeeva A.N., Mamaev Sh.I. Calculation of stresses in the material of 
tires during the formation of wheelsets in factories. St. Petersburg Scientific and Technical 
Conference “Problems of Strength of Structures in Railway Transport, 2008. 
[3]
Faizibaev Sh.S., Avdeeva A.N., Mamaev Sh.I. Evaluation of the wear of the tire wheel pair 
at rolling friction. South Asian Academic Research Journals (Kurukshetra, Iydia, vol.10, 
Issue 6, Junt 2020 1602-06). 
[4]
Rakhimov R.V., Mamaev Sh.I. UDC 629.463.23 640 VTP tipli tarozi tekshirish 
wagonlaring metal construction blue nazari tadқiқotlari. International Uzbek-Belarusian 
Scientific and Technical Conference composite and metal-polymer materials for various 
industries and agriculture May 21-22, 2020 State Unitary Enterprise "Fan va taragiyot" 
Tashkent -2020. 
[5]
Сагtег F. W. On the stability of running of locomotives. Proc. of the Royal Soc. 1926, ser 
A, vol 121, №788. 
[6]
Fedyaeva G.A. Traction electric drive control at the limit of wheel-rail adhesion and 
suppression of frictional auto-oscillations. Fedyaeva, S.Yu. Matyushkov, G.V. Rogovtsev, 
A.N. Tarasov // West. East Ukr. nat. un-that. Technical sciences T. 1. - Lugansk: 
Publishing house of VNU, 2011. - No. 4.- P. 31-36. 

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