Offshore platform

根据承载能力要求，海上平台起重机回转支承通常采用四点接触球式回转支承和三列滚子内齿回转支承。海上平台起重机使用的回转支承对材料有特殊要求。材料的机械性能必须能够保证在极端载荷下的安全系数。锻造取样冲击试验可达到平均值42J@-20℃或27J@-40℃。成品轴承必须经船级社认证。

Crane slewing bearing structure is divided into two parts: the top structure and the bottom structure. The top structure is connected to the upper mast, and the bottom structure is connected to the lower turntable. The mast and the turntable are connected together by pins. The driving device of the slewing structure is located at the bottom and mainly consists of three parts: a slewing motor, a slewing brake, and a slewing reducer, all of which are fixed on the lower turntable. The rotary motor is connected to the rotary brake through splines, and the rotary brake transmits power to the rotary reducer through the splines. The rotary reducer completes the rotary motion through the cooperation of the small gear and the large gear fixed on the intermediate base column.