Steel wire rope for rotary drilling machine and preparation method thereof

Abstract

The invention discloses a steel wire rope for a rotary drilling machine and a preparation method thereof. The steel wire rope is a fully pressed solid-strand steel wire rope by twisting three layers of strands around a central strand; each strand is formed by twisting 6 outer-layer steel wires around a central steel wire; the steel wires on the outer layer are approximately trapezoid; the central steel wire is approximately hexagonal; and steel wires in the strands are in surface contact with the steel wires, wherein the twist direction of strands of the steel wire rope on the outer layer is opposite to the twist direction of strands on two inner layers, and oil is filled in the steel wire rope. In the preparation method of the steel wire rope for the rotary drilling machine of the invention, cold drawing is performed on steel wire rope strands by using a die when the strands are twisted by utilizing a production mode of die drawing, the shape of the steel wires in the strands is changed but the cross section area of the steel wires is basically not changed to ensure that the steel wires in the rope strands are in surface contact with the steel wires, and stranding is performed; and simultaneously a mode of spraying oil on the strands and allowing the steel wire rope to pass through an oil pan is adopted during the production. Compared with those of the prior art, the wear resistance, the fatigue resistance, the rotation resistance and the entire tensile force of the steel wire rope for the rotary drilling machine are all remarkably improved.

Description

technical field [0001] The invention relates to a steel wire rope, in particular to a steel wire rope for a rotary excavator and a preparation method thereof. Background technique [0002] The working environment of the rotary excavator is very harsh, so the requirements for the wire rope are particularly high. Current steel wire ropes for rotary excavators, such as 35W×7 series steel wire ropes, etc., have low breaking force, and are easily worn after a long contact time with hoisting and pulleys during use, and the service life is greatly reduced. Contents of the invention [0003] One object of the present invention is to propose a steel wire rope for rotary excavators with better breaking tension and wear resistance in view of the above-mentioned defects in the prior art. [0004] Another object of the present invention is to provide a method for preparing the above-mentioned steel wire rope for a rotary excavator. [0005] The technical scheme for realizing the abov...

AI Technical Summary

Problems solved by technology

The current steel wire ropes for rotary excavators, such as 35W×7 series steel wire ropes, etc., have low breaking force, and are easy to wear after a long contact time with the winch and pulley during use, and the service life is greatly reduced.

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