DETERMINATION OF THE SUPPLEMENTAL VERTICAL DISPLACEMENT OF THE PANTOGRAPH RESULTING FROM THE CURVATURE OF THE STRIP AND THE POSITION OF THE CONDUCTOR IN THE PLANE

OPREDELENIE DOPOLNITEL'NOGO VERTIKAL'NOGO PEREMESHCHENIIA TOKOPRIEMNIKA ZA SCHET KRIVIZNY POLOZA I RASPOLOZHENIIA PROVODA V PLANE

Pantograph shoes with positive curvature (middle portion raised above end points where the horn begins) are applied in practice. It is interesting to clarify the influence of this characteristic of the construction upon the current removal in the established mode of operations. The presence of positive curvature leads to the degradation of conditions of dynamic interaction of the current collector with the catenary suspension due to the appearance of supplementary vertical movements of the runner leading to the increase of the vertical accelerations at the same train speed. It was shown earlier that in order to improve the current removal it is necessary to have negative curvature (directed downwards). With this it is possible to attain a position at which the mass of the runner will not have acceleration in motion along a lead installed with positive sag. The article goes on to discuss the raise of the runner at various distances of the lead from the angle of the track, the dependence of the raise of the runner upon the height of the rise of the current collector at any point of the span of a simple suspension with zigzag, the rise of the runner at any point of the span of a chorded suspension, and the total vertical movement of the runner due to the positive curvature and the changes of the height of the suspension. The report concludes that (1) the supplementary movements of the runner due to the presence of positive curvature depend upon a series of factors and can be defined according to the proposed formulas for various types of catenary suspensions. (2) The supplementary motion of the runner increases with the increase of the distance from the axis of the track and the decrease of the radius of curvature. (3) The supplementary motion of the runner is different at various points of the span, during which for the simple suspension with zigzag on sections the best motion is obtained under a fulcrum and for chorded suspension--in the middle of the span. (4) The received analytical expressions for defining the height of the current collector rise due to curvature can be easily introduced into methods for calculating on the computer the interaction of the current collector with the suspension, and this allows connection of the radius of curvature with the trajectory and the catenary depression of the current collector.

  • Supplemental Notes:
    • Abstract only is available in English, original untranslated as of November 1976.
  • Corporate Authors:

    Omsk Scientific Research Institute (Om.I.I.Ta.)

    Omsk,   USSR 
  • Authors:
    • Mikheev, V P
  • Publication Date: 0

Language

  • Russian

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00130296
  • Record Type: Publication
  • Source Agency: Federal Railroad Administration
  • Report/Paper Numbers: No. 137 Proceeding
  • Files: TRIS, USDOT
  • Created Date: Dec 1 1977 12:00AM