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Requirements for specific applications of wire ropes for aviation
2024-10-24
Aviation wire rope is mainly used to control rudder, aileron, engine, landing gear, compass and so on. Due to the special use environment, aviation wire rope needs to be safe and reliable, can be used for a long time, and has higher performance requirements than ordinary wire rope. For example, the tensile strength should be above 1865MPa, and the fatigue test should be carried out under different tension according to the structure and specifications. After the fatigue test, the worn parts should have sufficient strength, that is, the breaking force (see wire rope inspection) should not be less than 50% of the specified breaking force of the wire rope. Wire ropes for aviation also require high corrosion resistance. For example, a jet flying at an altitude of 10,000 meters has 90% of its flight time at minus 50 ° C. When landing in atmospheric conditions, the temperature changes very fast, and the surface of the wire rope is often dewy; In addition, when the brake lands, the engine blows smoke back through the aileron, aileron and vertical direction, which also has strong corrosion and pollution to the wire rope used. The varieties of steel wire rope for aviation are single steel wire rope, steel wire rope with movement and metal wire rope. The raw materials of steel wire rope for aviation are galvanized steel wire and carbon structural steel stainless steel wire. Galvanized steel wire coating should be uniform, continuous, no cracks and spalling. After passing the inspection of the raw material, it should be tightly and neatly wrapped on the I-wheel according to the technical requirements, and the laying length of the aviation wire rope loaded into the stranding machine should be 6 to 8 times the diameter of the wire rope, and the laying length of the strand and single strand wire should not exceed 12 times the diameter of the strand. The laying length of strands and wires shall be consistent throughout their length. The diameter of the center wire of the aviation wire rope should be thickened. The twisted wire rope should also be tempered at low temperature with oil as the tempering medium to eliminate the torsion stress of the wire rope, further remove the hydrogen in the galvanized steel wire, and improve the fatigue resistance and breaking force of the aviation wire rope. |
