Wheel Pair

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Wheel Pair


one of the main units of the running gear of a car or undercarriage of a locomotive. A wheel pair consists of an axle with two wheels mounted on it; it directs the motion of the car or locomotive along the rails. The wheel pairs accept and transmit all loads of the rolling stock to the rails and vice versa. Wheel pairs are joined in groups of two, three, or more in the trucks of a railroad car.

The wheels of the wheel pair usually are immovably attached to the axle. In some cases, the wheels may rotate on the axle or be displaced along it, moving together or apart depending on the track gauge. The wheel pairs of electric and diesel locomotives and of motor railcars are load bearing and accept the torque from the traction electromotors through a one-speed or two-speed gear drive or through a hydraulic reduction transmission. In this case a large transmission is mounted on the wheel pair axle.


Vagony. Edited by L. A. Shadur and I. I. Chelnokov. Moscow, 1965.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
For ease of fit in the curves of the track sections, these carts have 11 mm transverse stroke of the wheel pair relative to the sidewall.
Adhesion is a phenomenon caused by the rolling wheel pair subjected to a tangential traction, where the rolling pressure leads to deformation between the wheel and the rail as well as the continuous and stable contact surface between the wheel and the rail.
For a solution of the problem of dynamic interaction of wheel pair and rail gauge, the authors have proposed a block construction of the wheel set, which main feature is an independent rotation all surfaces their wheels contacting with surfaces of track rail.
Drugs were laid in the cache, which was located in wheel pair of the wagon, according to the press service.
Under such conditions, the wheel passes to compact contact with the rail and flange wear sharply slows down and takes place when both flange and the profile of the roll surface wear at the same time; mostly it gets to condemn the thickness of a wheel pair of flange 'B'.
1:p of new wheels equals to 1:20, and 1:p reaches 1:100, 1:200 and even more as wheels wear; [rho] is the radius of the wheel rolling circle, R--the curve radius, c--distance between side edge of rail head to axis, a--the distance between internal wheel pair flanges at altitude of where gauge width is measured and b--the flange thickness at altitude in the place where gauge width is measured.
To prevent spread of the weld pool and save welding consumables in surfacing, the wheel pair was inclined at the angle not less than 5[degrees] to horizon in such way that the wheel profile to be parallel to horizon [23].
According to Russian railways, the whetting with primal inductive heating is already effective with the whet 2.5-3 thousand wheel pair program.
Here the design must provide for the formation of a contact between wear-prone surfaces, and the condition of the wheel pair is difficult to predict.