Contact surfaces of a track part and railway wheel
AssigneeBWG Butzbacher Weichenbau GmbH
InventorsRuediger Ziethen, Erich Nuding, Sebastian Benenowski
Life of this patent
Estimating the term…
Abstract
To achieve low wear and hence a greater shape durability of track parts, it is proposed that the contact surface of a track part have a curvature having a constant difference .DELTA.K in relation to the curvature of the corresponding current contact surface of the wheel supported on it, or that successive contact surfaces of the track part and the wheel have a continually changing curvature difference .DELTA.K with the curvature difference between the contact surfaces of the track part and wheel lessening as the angle of contact tangent increases.
Claims13
A track part and a railway wheel combination comprising:
- a railway wheel having a pre-wear contact surface with a continually changing curvature across a width thereof;
- a track part having a pre-wear contact surface adapted for contact with the continually changing curvature of said railway wheel so as to form an angle of contact at contacting points of said contact surfaces, each said angle of contact being defined by an angle that forms between a normal force vector and a vertical force vector of a contact force that develops at the contacting point of said contact surface of said track part;
- said contact surface of said track part having a width-wise continually changing curvature, and said contact surfaces being dimensioned such that a constant curvature difference is maintained between said contacting surfaces as a function of the angles of contact along the width-wise continually changing curvature of the rail contact surface, and wherein said constant curvature difference is equal to a value other than zero.
A track part and a railway wheel combination, comprising:
- a railway wheel having a contact surface with a continually changing curvature across a width thereof;
- a track part having a contact surface adapted for contact with the continually changing curvature of said railway wheel so as to form an angle of contact at contacting points of said contacting surfaces, each said angle of contact being defined by an angle that forms between a normal force vector and vertical force vector of a contact force that develops at the contacting point of said contact surface of said track part;
- said contact surface of said track part having a width-wise continually changing curvature, and said contact surfaces being dimensioned such that a curvature difference exists between the curvature of the contacting surfaces as a function of the angle of contact, and such that the curvature difference between the contacting surfaces decreases as the angle of contact increases.
A track part for use with a railway wheel, the railway wheel having a pre-wear contact surface with a width-wise continually changing curvature, said track part having a pre-wear contact surface adapted for contact with the pre-wear contact surface of the railway wheel so as to form an angle of contact at contacting points of said contact surfaces, each said angle of contact being defined by an angle that forms between a normal force vector and a vertical force vector of a contact force that develops at the contacting point of said contact surface of said track part, said contact surface of said track part having a width-wise continually changing curvature, and said contact surface of said track part being dimensioned such that there exists curvature differences between the contacting curvatures of the wheel and said track part for differing angles of contact between said contact surfaces, and said curvature differences ranging from a constant curvature difference for all angles of contact between the contact surfaces to curvature differences which decrease as the angle of contact increases, and wherein all of said curvature differences being equal to a value other than zero.
Dependencies are inferred from the claim text.