VL81

The body of the VL81 electric locomotive is a similar in type body of the VL80 T electric locomotive, but with significant changes that are associated with the use of some new electrical equipment and the suspension of traction motors. The length of the body is the same as that of the VL83 electric locomotive. The only difference is that the body VL81 in spring suspension has only cylindrical springs, and friction dampers are installed parallel to the axle box springs. The diameter of the wheels is 1250 mm, the total wheelbase of the section is 10,400 mm, the wheelbase of the carriages is 2700 mm. Spring suspension has a static deflection, the deflection of the first stage is equal to 55.8 mm, the second stage of 73.5 mm. As well as on the VL83 electric locomotive, inclined rods are used, which serve to transfer braking and traction effort. The main elements of a traction drive are a hollow pin with a bearing unit, a single-sided single-stage spur gearbox, a coupling with elastic elements and parts that are used when attaching the coupling to the wheel center and the center of the gear wheel. The gearbox has a gear ratio of 65: 22 = 2.955, the module of gears and gears is 14.

The VL81 electric locomotive in its design has electric motors NB-507 with compensation windings. This electric motor is six-pole, collector. At the main poles there is a “Monolith −2” insulation, at the other poles there is polyamide insulation. The electric motor has a mass of 4700 kg, the anchor has a maximum speed of 1570 r / min. Here are installed: the main switch (VOV-25-4M), the main controller (ECG-8ZH), the rectifier unit (VUK-4000T) and a number of auxiliary machines and devices the same as on the VL80T electric locomotive; The electric circuit of this electric locomotive is basically saved. On the VL81 electric locomotive, an ODCE-5000 / 25V transformer is installed, which, unlike the VL80 T electric locomotive installed on an ODCE-5000 / 25B transformer, has oil cooling radiators arranged in two rows.

The VL81 electric locomotive has a modern combined ventilation system that reduces the pressure losses on the transformer cooling, rectifier units and smoothing reactors, traction motors, and also reduces air consumption. Due to this, the VL81 electric locomotive spends 8% of the total energy consumption, and for other types of electric locomotives, this figure is 18%. With continuous operation mode, the efficiency of the electric locomotive is 0.86; the mass of an electric locomotive is 200 tons, and the power factor is 0.855.

The VL81 electric locomotive is equipped with a resistance brake, in which the power of the braking resistors is 7400 kW, and at a speed of 80 km / h the braking force is 324 kN (33 000 kgf).

Compared to the VL80T electric locomotive, the VL81 electric locomotive has a much higher thrust force and power (with a design speed of 20% higher power, and with the hourly mode, 13.8 and 15%, respectively).

In 1977, after preliminary assessments of the dynamic qualities and adjustment tests of the ventilation system, the VL81 electric locomotive went into service at the Bataysk depot. Trolleys with frame-hanging after carrying out their tests were replaced by carts with axle-suspension of traction motors. Instead of the traction engine NB-408Kb, the traction engine NB-507 was installed. Having passed all these replacements, the electric locomotive returned to operation.