The air winch Operator shall ensure that the winch wire is moving freely in the derrick (possibly guided by pulleys) to avoid any damage to the steel structure, especially the fingerboard.
3
对绳槽硬度从HB170 ~ HRC60的各种滑轮对钢丝绳疲劳损伤的影响进行了研究。
Influence of groove hardness of steel sheave on fatigue life of wire rope from HB170 to HRC60 is investigated.