Traction sheave elevator

摘要

The object of the invention is a method for modernizing an elevator, and a traction sheave elevator, which elevator comprises at least an elevator car and a traction sheave that moves the elevator car by means of elevator ropes, the rim of which traction sheave comprises one or more rope grooves. In connection with modernization a traction sheave is installed as the traction sheave of the elevator, the rope grooves of which traction sheave comprise a material, the frictive traction achieved by which is greater than the frictive traction between the parent material of the metallic traction sheave and the elevator ropes.

主权项

1. A traction sheave elevator, comprising:
an elevator car; and a traction sheave that moves the elevator car via elevator ropes, the traction sheave includes one or more rope grooves corresponding to a number of elevator ropes, each rope groove includes at least two different materials in contact with the corresponding elevator rope, of which a first material is a hard and inflexible material, and a second material is a flexible material, wherein the second material is fitted into the rope groove of the traction sheave and supports the elevator rope, whereby a radial force exerted on the second material by the elevator rope is smaller than a resulting radial force exerted on the elevator rope by the second material, and wherein the second material is narrower in width than the rope groove, whereby air gaps between sidewalls of the second material and sidewalls of the rope groove are formed when the second material is fitted symmetrically in the rope groove, which air gaps accommodate an expansion of the second material when the elevator rope presses the second material towards a base of the rope groove.