NGC MHC Series Air Cooled Island Gearbox Introduction

The MHC Series Air Cooled Island Gearbox, independently developed by Nanjing High Speed Gear (NGC), is a high-performance transmission core customized for air-cooled condenser (ACC) systems in thermal power plants, cement, and chemical industries. Targeting the unique operational demands of air-cooled islands—including continuous heavy load, outdoor harsh conditions, and strict reliability requirements—this series integrates modular design, precision manufacturing, and industry-specific optimization, becoming a benchmark product in the global air-cooled transmission field.

Modular design is the core advantage of the MHC Series. NGC has optimized the component structure based on years of air-cooled system experience, realizing high interchangeability of gears, shafts, and housings. This design not only allows flexible customization according to different ACC unit specifications (such as cooling fan speed, power matching) but also shortens production and delivery cycles by 30% compared to non-modular products. Meanwhile, the modular structure simplifies on-site maintenance, reducing downtime and maintenance costs for power plant operations.

In terms of core performance, the MHC Series adopts high-strength alloy steel gears, undergoing strict carburizing, quenching, and precision grinding processes. Advanced tooth profile and helix modification technology are applied to optimize load distribution on tooth surfaces, while root shot peening treatment enhances gear bending fatigue strength by 20%+. The series achieves a torque range of 6.6–470 kN.m and is compatible with speed ratios matching air-cooled fan operation, ensuring efficient power transmission with low noise (≤85dB) and minimal vibration. Compared to traditional air-cooled gearboxes, it achieves a 25%-30% weight reduction under the same load capacity, reducing the load on ACC support structures.

Compliant with international standards such as ISO1328-1995 (gear accuracy), ISO6336-2006 (strength calculation), and ANSI/AGMA6010-E88, the MHC Series meets global market access requirements. Aiming at outdoor operation scenarios of air-cooled islands, it is equipped with an enhanced multi-layer sealing structure to effectively prevent oil leakage and dust ingress, adapting to extreme temperatures (-40℃ to +50℃) and high-humidity, dusty environments. Optional accessories such as temperature sensors, oil level monitors, and anti-backlash devices further improve operational safety and intelligence.

Widely applied in large thermal power plants at home and abroad, the MHC Series has been verified in projects of state-owned power giants such as Datang Group and Huaneng Group, realizing seamless replacement of imported gearboxes. With a design service life of over 10 years and a mean time between failures (MTBF) exceeding 20,000 hours, it provides a reliable, cost-effective transmission solution for air-cooled island systems, contributing to energy conservation and stable operation of power equipment.

NGC MHC Series Air Cooled Island Gearbox Specifications

Note: Air-cooled dedicated gearboxes for cooling tower/air-cooled condenser applications, with optimized sealing, thrust bearings, and forced lubrication. Weights are for standard reducer only (motor weight additional; IEC/NEMA/DIN frames compatible).