The NGW‑L82‑20‑55kW planetary gear reducer realizes speed reduction and torque increase through the turntable system of 'Sun wheel → Planetary wheel → Internal ring': solar wheel input, internal ring fixation, and planet carrier output. It uses multiple teeth to simultaneously mesh to obtain high load-bearing and high efficiency, and the dual-stage structure further expands the speed ratio and torque output.
Structure and working principle
Basic composition: sun gear (input), multiple planetary wheels, internal ring gear (fixed in the box), planet carrier (output).
Movement transmission: The sun gear drives the planet wheel to rotate both on and around the sun gear; the planet carrier converts the rotation of the planet wheel into output, achieving deceleration and increasing moment.
Load balance: Use structures such as sun gear or planetary carrier floating to evenly distribute the loads of multiple planetary wheels to reduce vibration and noise.
Transmission efficiency: The double-stage efficiency is about 94%-96%, and it can operate stably for a long time under rated operating conditions.
Relationship between speed ratio and torque (principle)
Transmission ratio (common formula for single-stage, 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 stages are the product of two-stage speed ratios.
Torque relationship: Output torque ≈ Input torque × Transmission ratio × Efficiency; the 55 kW model can provide corresponding output torque under rated operating conditions.
Applicable and restrictive (related to principles)
Applicable conditions: high-speed shaft speed ≤1500 r/min; gear circumferential speed ≤15 m/s; ambient temperature -40℃~+45℃; can be rotated forward and reverse.
Limitation and maintenance: High requirements for installation coaxiality, lubrication and sealing; overload, impact or poor lubrication will significantly affect life and efficiency.
