NE (HE) Series Vibrating Screen Exciter

The NE (HE) series exciter is a gear-driven vibration unit that converts motor rotation into linear or circular motion for vibrating screens. Each model is defined by its maximum centrifugal force: NE-60 delivers 75 kN, NE-90 delivers 110 kN, NE-120 delivers 150 kN, NE-150 delivers 185 kN, NE-180 delivers 215 kN, NE-220 delivers 240 kN, and NE-260 delivers 260 kN. Operating speed options include 980 rpm for high-stroke applications, 1200 rpm for standard screening, and 1500 rpm for fine screening. The exciter housing is cast from high-tensile GG25 cast iron, and the gear pair is case-hardened 20CrMnTi steel with a surface hardness of HRC 58-62. This construction allows continuous operation at ambient temperatures from -20°C to +40°C without derating.

Typical applications include primary and secondary screening of crushed stone, ore, and coal. In a 300 t/h aggregate plant, two NE-150 exciters mounted on a 2.4 m × 6 m screen produce a 12 mm stroke at 980 rpm, effectively separating 0-5 mm fines from 5-20 mm aggregates. The oil-splash lubrication system requires only 2.5 liters of ISO VG 220 gear oil per exciter, with oil change intervals of 2,000 hours. This reduces maintenance downtime compared to grease-lubricated motor vibrators, which typically need re-greasing every 200 hours. The exciter's IP55 rating and F-class insulation allow operation in wash plants where water spray and humidity are constant.

Compared to other exciters in the same force class, the NE (HE) series offers a distinct advantage in serviceability. The counterweights are externally mounted and can be adjusted without removing the exciter from the screen. A single exciter can be re-phased from 0° to 180° in 15° increments to change the motion from linear to elliptical. This flexibility means one exciter model can serve multiple screen types, reducing spare parts inventory. Additionally, the bearing housing is designed with a labyrinth seal and a grease purge port, which extends bearing life to over 20,000 hours in dusty conditions. For plants that run 24/7, this translates to fewer unplanned stoppages and lower total cost of ownership.

• Gear-driven design with 98% mechanical efficiency, reducing energy consumption by up to 15% compared to belt-driven exciters.
• External counterweight adjustment allows force changes in 5% increments without disassembly, cutting maintenance time by 50%.
• Oil-splash lubrication with 2,000-hour oil change intervals and a 20,000-hour bearing life (L10h) under continuous load.