1. Working principle of
crane reducer/gearboxThe working principle of the reducer/gearbox is based on gear transmission, and the speed and torque conversion is achieved through the meshing of gears of different sizes. Common working methods include:
(1) Multi-stage gear reduction
The motor drives the input shaft to rotate at high speed, and the small gear (driving wheel) on the input shaft drives the large gear (driven wheel) to rotate.
Since the number of teeth on the large gear is far greater than that of the small gear, the speed is reduced and the torque is increased.
After multi-stage gear transmission (such as 2-3 stage reduction), the output shaft finally obtains low-speed and high-torque power.
(2) Planetary gear reduction (used by some cranes)
It consists of a sun gear, a planetary gear, and an inner ring gear, with a compact structure and a large transmission ratio.
The motor drives the sun gear to rotate, and the planetary gear revolves around the sun gear and drives the output shaft to reduce speed.
2. Common faults and maintenance of reducers/gearbox
Common faults of crane reducers/gearbox:
Gear wear: caused by long-term overload or poor lubrication.
Bearing damage: vibration is aggravated and needs to be replaced in time.
Oil leakage: seal aging, need to be repaired or replaced.
Maintenance of
crane reducers/gearbox:
Regularly check lubrication: ensure sufficient gear oil and avoid dry friction.
Monitor vibration and noise: abnormal vibration may mean gear wear or bearing damage.
The crane reducer/gearbox achieves speed reduction and torque increase through gear transmission, and is a key component to ensure the smooth operation of the crane. Depending on different lifting requirements, cylindrical gear, planetary gear or worm gear reducer can be selected. Reasonable maintenance of the reducer/gearbox can extend its service life and improve the working efficiency and safety of the crane.
