Friction liner and traction sheave

A liner for a traction sheave comprising

• a top surface and a bottom surface mutually spaced on a height-wise axis (H), a front surface and a back surface mutually spaced on lengthwise axis (L), and a plurality of side surfaces including a first side surface and a second side surface mutually spaced in a widthwise axis (W),
• wherein in a first cross sectional profile of the liner, defined by the plurality of side surfaces forms convergent-divergent profile, such that:
• the first cross sectional profile includes a first neck portion intermediate of the top and bottom surfaces, whereat the liner is widthwise narrowest;
• a top portion of the liner is height-wise above the first neck portion and a bottom portion of the liner is height-wise below the first neck portion;
• in the top portion of the liner, the plurality of side surfaces converge between the top surface and the first neck portion;
• in the bottom portion of the liner, the plurality of side surfaces diverge between the first neck portion and the bottom surface;
• and
• first and second grooves are formed to extend height-wise upwardly from the bottom surface and toward the top surface, intermediate of widthwise ends of the bottom surface, wherein the first and second grooves are widthwise spaced apart from each other.