PLF Series Planetary Reducer: NGW-Type & Floating Load-Sharing Heavy-Duty Solution
I. Product Overview
Weigao PLF Series Planetary Reducers, covering models PLF60, PLF80, PLF90, PLF120, and PLF160, are heavy-duty transmission devices integrating NGW-type planetary gear trains and floating load-sharing technology. Tailored for scenarios demanding uniform load distribution, strong impact resistance, and wide temperature adaptation such as heavy-duty conveyors, mining machinery, and industrial tower equipment, this series overcomes the shortcomings of traditional reducers such as uneven load bearing, poor impact resistance, and narrow temperature adaptation in heavy-load transmission fields. Compliant with ISO 6336 gear standards and ISO 9001 certification, with IP66 protection grade, it features integral forged gear sets, floating sun wheel structure, and reinforced cast iron (large models) and high-strength cast aluminum (small models) housing. Boasting advantages of floating load sharing, strong impact resistance, wide temperature adaptation, and reliable durability, it operates stably at -40℃ to +100℃, serving as a core transmission component for heavy-industry equipment worldwide.
II. Core Advantages
1. NGW-Type Planetary Structure, Floating Load Sharing
Adopting optimized NGW-type planetary gear train (sun wheel input, planetary架 output, inner gear ring fixed), the PLF series achieves efficient heavy-duty transmission through multi-point meshing of integral forged components. Gears are crafted from 40Cr alloy steel, undergoing调质 treatment, deep carburizing, quenching, and precision grinding to ISO 6-level accuracy (GB/T 10095.1-2008 equivalent), with tooth surface hardness up to HRC 58-62 and roughness ≤Ra 0.04μm. The innovative floating sun wheel structure ensures uniform load distribution among 3-6 planetary gears (3 for light load, 4-6 for heavy load), with load imbalance degree controlled within 5% to reduce single-gear wear. Detailed precision parameters: sun/planet gear tooth profile tolerance (f) ≤0.012mm, tooth direction tolerance (f) ≤0.010mm, cumulative pitch error (F) ≤0.030mm. Single-stage transmission efficiency hits 97%-98.5%, speed ratio 3:1-100:1 (multi-stage extendable to 3200:1), torque density reaches 17Nm/cm³, perfectly matching heavy-load impact transmission demands.
2. Reinforced Housing Design, Strong Impact Resistance
The series features reinforced structural design to withstand frequent impact loads in heavy-industry scenarios. PLF60-PLF160 form a complete product matrix: PLF60-PLF90 (high-strength cast aluminum housing) cover 0.5kW-37kW power and 300Nm-4000Nm torque for light-medium heavy load; PLF120-PLF160 (integral cast iron housing) cover 45kW-132kW power and 5000Nm-25000Nm torque for super heavy-load scenarios. Housing structure optimized via finite element simulation, with thickened wall (0.025a + 1mm, a为中心距) and dense reinforced ribs, enhancing integral rigidity by 30% and resisting deformation under 2 times rated load impact. Equipped with CARB圆环滚子轴承 at the output end, it compensates for shaft deformation while bearing radial impact loads, minimizing vibration during heavy-load operation and extending component service life.
3. Enhanced Sealing Protection, Harsh Environment Adaptation
Integrated wide-temperature and high-protection design ensures reliable operation in extreme industrial environments. Input/output ends adopt triple-lip fluorine rubber oil seals combined with labyrinth sealing and dust-proof cover, achieving IP66 protection to prevent dust, heavy rain, and corrosive media intrusion. Small models (PLF60-PLF90) adopt hard anodized anti-corrosion treatment, large models (PLF120-PLF160) electrophoretic treatment (C4 grade), adapting to coastal, mining, and high-humidity environments. Integrated cooling fins arranged by heat flow density ≥0.15W/cm², enhancing heat dissipation efficiency by 28%, and low-temperature resistant lubrication matching enables stable operation at -40℃ to +100℃. Operating noise ≤58dB at 1m, radial runout ≤0.015mm, service life extended to over 40000 hours under normal heavy-load continuous operation.
4. Heavy-Duty Lubrication, Low Maintenance Cost
The lubrication system adopts ISO VG 220 extreme pressure industrial gear oil, featuring excellent anti-wear, anti-oxidation, and high-temperature stability, matching heavy-load impact and wide-temperature operation. Oil bath lubrication with forced circulation design ensures uniform oil supply to meshing parts and bearings, forming a stable oil film to reduce wear. The housing is equipped with a high-precision oil level sensor, visual oil level window, and filter-equipped oil drain port, facilitating real-time monitoring and maintenance. Recommended oil change cycle: 12000 hours for continuous heavy-load operation, 8000 hours for high-impact scenarios. Modular design allows quick disassembly of gear sets and bearings, with standardized heavy-duty accessories ensuring consistent load-sharing performance after overhaul, reducing maintenance downtime and costs.
III. Typical Application Fields
- Mining Machinery: Ore conveyors, crusher auxiliary drives, floating load sharing withstanding impact load (PLF60-PLF90 for light load, PLF120-PLF160 for super heavy load)
- Industrial Towers: Cooling tower drives, ventilation tower transmission systems, wide temperature adaptation and IP66 protection adapting to outdoor harsh conditions
- Heavy-Duty Conveyors: Port container conveyors, steel mill billet conveyors, reinforced structure resisting long-term heavy-load operation
- Construction Machinery: Hoisting equipment auxiliary drives, concrete mixing machine transmissions, strong impact resistance matching construction scenarios
- Metallurgy Equipment: High-temperature roller tables, smelting auxiliary machinery, high-temperature resistance and corrosion protection adapting to metallurgical environments
IV. Key Technical Parameters
| Model | Planetary Gear Quantity | Rated Torque | Operating Temperature Range | Housing Material |
|---|
| PLF60 | 3 | 300Nm-800Nm | -40℃~+100℃ | High-Strength Cast Aluminum |
| PLF80 | 3-4 | 900Nm-2200Nm | -40℃~+100℃ | High-Strength Cast Aluminum |
| PLF90 | 4 | 2300Nm-4000Nm | -40℃~+100℃ | High-Strength Cast Aluminum |
| PLF120 | 4-5 | 5000Nm-15000Nm | -40℃~+100℃ | Integral Cast Iron |
| PLF160 | 5-6 | 16000Nm-25000Nm | -40℃~+100℃ | Integral Cast Iron |
V. Installation & Maintenance
Select models based on rated torque, transmission ratio, load type, and operating temperature (refer to the specification table). Ensure coaxiality error ≤0.02mm during installation, fasten bolts with specified torque (30-60N·m for PLF60-PLF90, 80-130N·m for PLF120-PLF160) in diagonal sequence, and install shock-absorbing bases for high-impact scenarios. Use ISO VG 220 extreme pressure gear oil, replace every 8000-12000 hours based on load intensity. Regularly inspect sealing performance, gear meshing status, and oil quality, calibrate load distribution every 12 months. Avoid overload operation exceeding 2 times rated torque, and entrust maintenance to professional heavy-duty equipment technicians.
Weigao PLF Series adheres to the philosophy of "load balance, heavy-duty durability, and extreme adaptation". Its NGW-type planetary structure and floating load-sharing design break through traditional reducers' load-bearing limitations, ensuring reliable operation in harsh heavy-industry scenarios. Backed by strict quality control and professional after-sales service, it provides high-performance solutions for mining, metallurgy, and port machinery, establishing itself as a trusted global partner in heavy-duty planetary transmission.
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