Engineering sciences

Ibragimova S.I., Polischuk V. I.

TRANSPORTATION PROCESS CONDITION`S INFLUENCE ON THE OPERATION OF LOCOMATIVE TRACTION OF THE INDUSTRIAL RAILWAY

Ekibastuz technical engineering institute named after Academician K.I.Satpaev Ekibastuz E-mail: ibrsvetlana@mail. ru

It is considered the main features of operation The main features of maintenance of locomotive traction assemblies OPE-1 on cuts of the Ekibastuz opencast colliery operation condition of locomotive traction motors NB-412P, data about malfunction the reasons of their origination and measures increasing its reliability of traction motors at an industrial railway transportation are state

I. Introduction. Traction motors are concerned as the most loaded equipment of electric locomotives ( ELT). According to data specialists of the Project and design bureau of locomotive transport open joint-stock company «Russian railways» (LPDDB JSC RR Open Society "R.R- Russian Railways") principal views of failures ELT are connected with punctures of isolation of windings, turn-to-turn faults (TTF), decrease in an insulation resistance of armature windings and poles which make 34-47 % from the general number ELT, failed in 2006-2008 years. Expenses of Open Society "JSC -RR" for repair ELT have made for 2003-2008 years more than 6 billion rbl. [1]. Research and elimination of the reducing reasons of decrease in resource ELT is an actual problem.

II. The Statement of problem. On cuts of the Ekibastuz opencast colliery of operational condition ELT more complicated than on the main ways: a height above sea level about 1200 m, humidity of air to 90 % at 20 ^оС, a complex plan and a way profile (curves in radius 200м, insignificant length of sections with grades to 60 ‰); a temperature varying range(from-43 to +40 ^оС) [2]; the quantity of start-ups per days at times attains 1500, and changing direction of an armature to 300; frequent the wheel pairs, originating in a loading regime and at traffic on exit trensh [3]. Therefore it is necessary to spend qualitative analysis of features of damageability ELT in the conditions of Ekibastuz coal cuts.

III. Results. There are more than 500 ELT in operation at the Limited liability companies "Bogator Komir" (Open Company "BК") the faults which made up in 2007-2008 years have made 43-46 % from the general failure of traction assemblies. According to the data of railway equipment repair of emergency shutdowns of traction assemblies OPE-1 because of falling out ELT NB-412P it is possible to outlined repeating derangements: short circuit of excitation windings on the case, short circuit of closed armature winding, turn-to-turn windings, soldered connection commutate neck of a collecting channel, a slide of a small sprocket from the armature shaft, an armature shaft dog-leg. Distribution of basic failures ELT NB-412P for 2007-2008 years is shown in Table 1.

Table 1 Distribution of basic failures ELT NB-412P for 2007-2008

№	The fault’s name	Share in %
1	Test of isolation and TTF armature windings	33
2	Test of isolation and TTF main-pole windings	11
3	Test of isolation and TTF windings of additional poles	6
4	Test of isolation and TTF the compensating field	5
5	Reduction of isolation of anchor and polar windings	3
6	Faults of connectors	8
7	Faults of anchor bandages	2
8	Faults of anchor bearing	5
9	Armature shaft breakage	8
10	Faults of connection poles	3
11	Faults of brush knots, crossarms	3
12	Collecting channel faults	7
13	The others	6

From table 1 it is seen, that the greatest percent of ELT faults makes isolation test, TT an armature winding and the main poles. From a distribution bar graph on months for 2007-2008 (drawing 1) it is visible, that maximum quantity TTF originates in the coldest and hottest months.

Drawing 1 Bar graphs of isolation failures windings of armatures and excitation ELT NB-412P of traction assemblies OPE1 of the Powerful complex for 2007-2008 years

Principal causes of failures ELT low efficiency snow fence devices, hit of a coal dust in crazes of the multilayered insulating varnishes an unsatisfactory condition of a way with the raised rigidity. Promoting factors are: infringements of a regime of maintenance, sharp differences of voltage in the contact network, the increased temperature conditions, the reinforced loading at the expense of weight norms and heavy grades, an overloading of propellers at traffic on exit траншее, insufficient cooling.

Elimination of these failures and planed repair works and routine maintenance make the basic share of expenses under contents ELT in maintenance.

The considerable part of faults ELT can be eliminated only at factory repair which in repair depots on railway equipment repair is not carried out, and on external baselines was not carried out since 1995. In locomotive shed repair depots of Joint Company "BК" operating repairs (RR) are carried out only in which volume at ТР-RR1 diagnosing ELT by devices of Open Company "Transport" of Omsk («the Doctor 030», ILP-1, "Cedar", "Forecast", A contact less thermometer) on following parameters is done : resistance case and the interterm insulation, humidity factor; in volume RR-2, RR-3 – broach connection, replacement partially the compensating winding, replacement partially compoles, a coating method of dipping in the ML varnish, TO; in volume of capital repairs - replacement case and partially the interterm- insulation, replacement of bearings, restoration of cones of a shaft and beds of motorno-axial bearings, a coating method dipping in the ML varnish, TO (the operating time makes 2,5 - 4 years). Quality of repair not always meets the installed demands.

IV. Leading-outs.

From the above-stated follows, that existing methods of the account and elimination of failures ELT do not allow making qualitative analysis and absence of planned factory repairs reduces their resource. It is necessary to develop scientifically proved technical and organizational provisions to rise of resource ELT, considering features of operating conditions of traction assemblies OPE-1 on Ekibastuz coal cuts.

The literature:

1. O.L.Rapoport, D.N.Homchenko. Necessity of the system of monitoring of a thermal condition of railway motors.//the Locomotive. - 2009. - № 5. - с.37.

2. Open Company "Karaganda". Technical and economic account for choice conducting production mining engineering on a cut "Bogator" of Open Company " Bogator Access Komir". Volume 1, ELT 7220-SHZ. - Karaganda.: 1998 с.17.

3. Potapov M.G.Remont of an electrorolling stock of industrial transport. - М: Transport, 1982 - с.155.

Polichshuk Vladimir Iosifovich - the manager of chair "Electric power industry" of Ekibastuz Technical Engineering Institute named after academician K.Satpayev, a Cand.Tech.Sci. Graduted from the Pavlodar Industrial Institute in 1990г. Department of "Electric generating plants". The dissertation was defended in 2007г. at Omsk State Technical University on a theme «Development of the theory of construction and protection of a rotor of the synchronous generator from turn-to-turn short circuits»

Home address: 141216 Republic Kazakhstan, Pavlodar provence, Ekibastuz, Solar Green journey 1, sq. 55.

Ibragimova Svetlana Ivanovna - the senior lecturer of chair "Transport" of Ekibastuz Technical Engineering Institute named after academician K.Satpayev. graduated from the Ural Electromechanical Engineering Institute of the department railway transportation in 1972. "Electrorolling stock".

Home address: 141216 Republic Kazakhstan, the Pavlodar provence, Ekibastuz, Lenin's street, 68, apt. 80.

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