尾索をもつ巻索の動張力について
ロープガイド立坑ロープの振動に関する研究 (第2報)
1985 年 101 巻 1165 号 p. 151-156
詳細
1985 年 101 巻 1165 号 p. 151-156
An abnormal dynamic tension on winding rope with a tail rope installed in rope guided winding shaft may be resulted from an emergency braking or a rough loading into the cage. This paper discusses the effectiveness of tail rope on such the dynamic tension of winding ropes. Some results obtained are as follows:
(1) Following on an emergency braking or a rough loading into the cage, the excursion of the acceleration value at the cage reaches almost twice of that value at the driving sheave.
(2) During emergency braking, ascending tail rope tends to float, by which the necessary grip on the driving sheave may be lost.
(3) When a load is dropped into the cage with zero head, the winding rope with no tail rope performs the 1st mode vibration. On winding rope with tail rope, the 2nd and 3rd mode vibrations are significant when the cage is nearby the pit mouth.
(4) At the cage depths where the tail rope is twice as long as the winding rope, the dynamic tension on the winding rope caused by a sudden loading is effectively reduced.
(5) A dynamic tension of 4-5 times greater than the loaded weight may appear at the driving end. when the load is dropped into the cage with a head of 0.1-0.2m.
(6) As the loading weight increases, the ratio of the peak value of dynamic tension to the loaded weight decreases.
