NGC Successfully Deploys New 2250kW Permanent Magnet-Gear Drive System for Tower Mills

With increasingly stringent national environmental policies and the mining industry's transformation towards intensive and green operations, energy conservation, emission reduction, and equipment upgrades have become crucial for mining companies to enhance their competitiveness. The continuously growing demand for high-grade concentrate has placed higher demands on ore crushing and grinding processes. Traditional high-grade concentrate production processes are complex and energy-intensive, and inconsistent raw ore grades lead to significant fluctuations in product quality. The mining industry urgently needs a reliable, efficient, and intelligent grinding drive system to reduce energy consumption and enable flexible production.

Nanjing High Speed Gear Co., Ltd. (Nanjing High Speed Gear) actively responds to the needs of the national and mining industries, leveraging its strategic transformation "from transmission to drive," and has developed a new permanent magnet-gear drive system for tower mills. This system adopts an electromechanical integrated design, combining a permanent magnet motor, gear transmission, and frequency converter control system, fully utilizing the advantages of the high efficiency of the permanent magnet motor, the high torque density ratio of the gear transmission, and the intelligent control of the frequency converter system. Compared to traditional asynchronous drive systems, the tower mill permanent magnet-gear drive system is 40% lower in height, 25% lighter, and achieves energy savings of over 8%, fully embodying the product philosophy of "reliability, efficiency, greenness, and added value."

Product Introduction：

Reliable

The tower mill's permanent magnet-gear drive system adopts a low-speed drive scheme, significantly reducing vibration and noise. The product has undergone multiple tests before leaving the factory, including permanent magnet motor type testing, drive system no-load testing, and mechanical seal testing. On-site testing by the customer shows that under full load operation, the system vibration value is <2.0mm/s, noise <80dB(A), permanent magnet motor temperature rise <45K, and gear temperature rise <35K. The drive system operates stably and reliably, fully meeting the operating requirements of the tower mill main unit.

High Efficiency

By integrating the low-speed permanent magnet motor and gear transmission, the transmission chain is shortened, reducing energy loss. The low-speed permanent magnet motor has high energy efficiency characteristics, the system has no coupling losses, and the gear part has forced lubrication with no oil churning losses. The overall efficiency exceeds 94%, which is about 8% higher than the traditional asynchronous motor + gearbox (oil-immersed lubrication) drive system, significantly reducing long-term operating costs.

Green

Under the same power and load conditions, the permanent magnet-gear drive system achieves a 40% reduction in height, significantly saving on plant construction height; a 25% reduction in weight, significantly reducing the use of raw materials in the drive system; and highly efficient energy-saving characteristics significantly reduce power consumption, helping mining enterprises achieve green and low-carbon production.

Value Added

Equipped with an intelligent variable frequency closed-loop vector control system, it has full-load soft-start capability, with a starting current only 1/3 that of asynchronous systems, effectively reducing the factory's transformer capacity requirements; by adjusting the drive system speed, it precisely matches the mineral processing process, adapting to different ore grades, significantly improving production flexibility and economic efficiency.

The successful application of Nanjing High Speed Gear's "2250kW Tower Mill Permanent Magnet-Gear Drive System" has brought a brand-new solution to the mining industry, helping the industry accelerate its progress towards green, efficient, and intelligent manufacturing.