Working principle and performance advantages of NCZD500-1250-1 planetary gear reducer

The core of the working principle of the NCZD500-1250-1 planetary gear reducer is planetary gear train meshing transmission, which achieves an ultra-large reduction ratio through the synergy of the sun gear, planetary gear, and internal ring gear; its performance advantages revolve around 'ultra-large transmission ratio, ultra-high torque, and high stability', making it perfectly suitable for ultra-heavy and low-speed working conditions.

1. Working principle: three-stage meshing transmission of planetary gear train

The reducer is

Single-stage planetary transmission structure

('1' in the model represents level 1), through the transmission path of 'sun gear active → planetary wheel rotation → planetary carrier output', the high speed of the motor is converted into low speed and high torque. The specific process is divided into three steps:

1. Power input: sun gear receives power

   The motor output shaft is rigidly connected to of the reducer the sun gear . After the motor is started, it drives the sun gear to rotate at high speed (for example, the motor speed is 1500r/min). The sun gear serves as the driving wheel and drives the surrounding 3-4 planetary gears to rotate through tooth surface meshing.

2. Power transmission: planetary wheel 'revolution + rotation'

   The planet gear meshes with the sun gear (external gear) and the fixed internal gear gear (internal gear) at the same time. Constrained by the internal gear gear, the planet gear 'rotates' around its own axis and 'revolves' around the sun gear axis, forming an 'epicyclic gear train' transmission.

3. Power output: Planetary carrier outputs low speed and high torque

   All planetary gears are mounted on the planet carrier through bearings. The revolution of the planetary wheels directly drives the planet carrier to rotate at low speed. The planet carrier is then connected to the output shaft of the reducer, and finally transmits the power to the load.

   Because the transmission ratio (1250) is calculated by 'the number of internal ring gear teeth ÷ the number of sun gear teeth + 1', the input speed of 1500r/min can be finally reduced to about 1.2r/min (1500÷1250), and the torque is amplified 1250 times (ignoring efficiency loss), achieving 'low speed, super torque' output.

2. Performance advantages: 4 core highlights for adapting to super-heavy duty conditions

NCZD500-1250-1, as a super large frame size (500) and super large transmission ratio model, has performance advantages that specifically address the 'heavy load, low speed, continuous operation' requirements, which are specifically reflected in four aspects:

1. Ultra-large transmission ratio + ultra-high torque, suitable for ultra-low speed and heavy loads

The transmission ratio is as high as 1250, which is the upper limit of single-stage planetary transmission. It can directly realize the conversion of 'high motor speed → ultra-low load speed' without the need for multi-stage transmission superposition. With a high-rigidity structure of 500 bases, the rated output torque can reach 100,000-200,000 N·m (specifically based on the manufacturer's parameters). It can drive super-heavy loads such as large ball mills and heavy-duty rotary equipment to avoid equipment jamming due to insufficient torque.

2. High transmission efficiency and low energy loss

Compared with multi-stage cylindrical gear transmission, the single-stage planetary transmission structure has more meshing teeth (the planetary gear meshes with the sun gear and the internal ring gear at the same time), the load is evenly distributed, and the transmission efficiency can reach 97%-99% ; even when operating at full load, the efficiency loss is only 3%-1%, which is much lower than multi-stage transmission (usually 85%-90% efficiency). Long-term use can reduce electricity consumption and reduce operating costs.

3. Compact structure and small space occupation

The planetary gear train adopts a 'center-symmetric' layout, with all planetary gears evenly distributed around the sun gear. Under the same torque output, the equipment volume is only 1/3-1/2 of a traditional cylindrical gear reducer. Although the 500 base is a large-size model, it can still save installation space compared to other types of reducers with the same torque. It is especially suitable for heavy-duty industrial scenarios with compact plant layouts (such as metallurgical workshops and underground mines).

4. Strong impact resistance and high operational stability

• The integrated design of the inner ring gear and the casing has strong rigidity and can withstand instantaneous impact loads (such as material impact, equipment start-stop impact), and the impact load bearing capacity can reach 1.5-2 times the rated load to avoid tooth surface fracture due to impact.

• The planet wheels are evenly distributed so that radial loads cancel each other out. The radial runout error of the output shaft is ≤0.05mm. The vibration during operation is small (amplitude ≤0.04mm) and the noise is low (operating noise ≤75dB). It can reduce vibration interference to load equipment and extend the life of the overall production line.