Introduce the working principle of NGW-L82-20-55KW planetary gear reducer

The NGW-L82-20-55kW planetary gear reducer achieves reduction and torque increase through a rotating wheel system of "sun gear → planet gear → inner ring gear": the sun gear is input, the inner ring gear is fixed, and the planetary carrier is output. It uses multiple teeth to mesh simultaneously to achieve high load and efficiency, and the two-stage structure further expands the speed ratio and torque output.
Structure and Working Principle

Basic components: sun gear (input), multiple planetary gears, internal gear ring (fixed to the casing), planetary carrier (output).

Motion transmission: The sun gear drives the planetary gears to both rotate and revolve around the sun gear; The planetary carrier converts the revolution of the planetary gears into output, achieving deceleration and torque increase.

Load balancing: Using structures such as floating sun gears or planetary carriers to evenly distribute the load among multiple planetary gears, reducing vibration and noise.

Transmission efficiency: The two-stage efficiency is about 94% -96%, and it can operate stably for a long time under rated conditions.

Relationship between speed ratio and torque (principle)

Transmission ratio (commonly used single-stage formula, fixed ring gear, planetary carrier output): i=(zR+zS)/zS, where zR is the number of ring gear teeth and zS is the number of sun gear teeth; Double stage is the product of two speed ratios.

Torque relationship: Output torque ≈ Input torque × Transmission ratio × Efficiency; The 55 kW model can provide corresponding output torque under rated operating conditions.

Application and limitations (related to principles)

Applicable conditions: High speed shaft speed ≤ 1500 r/min; Gear circumferential speed ≤ 15 m/s; Environmental temperature -40 ℃ to+45 ℃; Can be reversed.

Limitations and Maintenance: High requirements for installation coaxiality, lubrication, and sealing; Overloading, impact, or poor lubrication can significantly affect lifespan and efficiency.