Water Quench Rolls,Water Quench Steel,Water Quench Rolls Aluminum,Water Quench Rolls Carbon Steel Jiangsu Kinuo Furnace Roller Co., Ltd. , https://www.jskinuoroller.com
The slewing mechanism of the portal crane is the main mechanism supporting the door machine operation, including the slewing bearing device and the slewing drive device. The slewing drive mechanism realizes power and speed transmission of the rotary portion of the door machine relative to the non-rotating portion. This kind of device needs to meet the requirements of low speed forward and reverse rotation, stable braking, safe and reliable.
The upper part of the crane's working range ranges from a standard toroidal surface to a ring-shaped surface of a standard stadium type with a wide range of variations and variable running and moving speeds. Therefore, the slewing mechanism gear ring, the horizontal wheel and the raceway are subjected to a large period, a non-periodic dynamic load and inertial force of the tower crane price.
Therefore, the teeth and raceways are prone to accumulation and fatigue damage. In the case where the life of the whole machine has expired, the failure situation is more frequent.
However, the damage of the rotating ring gear, in addition to the excessive force of the gear caused by the eccentricity of the slewing mechanism, the periodic stress damage and the life failure, will also cause problems caused by the poor meshing of the gear teeth due to the skew of the pinion gear of the drive reduction gearbox. Therefore, limiting the eccentric load and ensuring the correct and reliable positioning of the drive reduction gearbox is essential to protect and extend the operational safety of the slewing mechanism.