Vitaliy Statsenko Scientific supervisor DSc. Leonid Bondarenko

Figure 1. Dependence of deviation angle ψ longitudinal axis of the wheel from the axis of the rails 1-adjusted coefficient of rolling friction K K3 a axis and;2 - the same respect in K K3 b 3 - the total value of rolling friction coefficient is given K PC, which falls on the sliding friction rim surface of the rails; 3’, 3” - normative coefficient of friction bearings for the flat and rounded surface.

Size a and b in the case of equal values of elastic modul and Poisson's ratio node wheels and rails are determined by the expressions [3] (15) Experimental value of the resistance movement of friction at Kp = 1 and the current value of Kr, (13) But given the value of coefficient of friction bearings (14)

Fig.2. Dependence of deviation angle ψ longitudinal axis of the wheel axis rails 1 - total experimental values of resistance movement W TP, which includes the friction surface sliding on rails, 2 - component, which accounted for only friction of flange; W EP ; 1̕, 2̕ - size, similar 1 and 2 with linear contact; 4,5 - power that is on a sliding W K 3 at contact lines and point ; 4’, 5’ - same with linear contact

We find values of resistance movement from the friction of the normative method W TP that component, which falls on the sliding friction wheels on rails W K3 surface due to a distortion angle. Calculations of conduct for wheel diameter = 250 mm unit with a static load P = 40 kN of linear and point contacts for crane trolley connected by flexible cable (Kp = 2) and d = 50mm; f = 0,4, f = 0, 3 - rounded and flat (B = 45 mm) head rails, if η = 0,1; μ = 0,15.

1. Factor that takes into account the friction of wheels on rail rebord consists of two main components: direct and friction rebordy component of sliding friction wheel rim on the back rails due to mismatch longitudinal axis with the axis of the wheel rails. 2. A component of sliding friction on the rim rail depends on the angle discrepancy axis rails and wheels and such at ψ = 3 ° is about 12% of the total value of point contacts - about 10% linear

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