How Does the NE (UE) Series Exciter Handle High-Tonnage Screening?
The NE (UE) series exciter is a gear-driven vibration unit that converts motor rotation into a controlled centrifugal force. Each model is defined by its maximum force output: the NE-20 delivers 20 kN, while the NE-180 reaches 180 kN. Speed options include 750 rpm for coarse scalping, 1000 rpm for medium-duty sizing, and 1500 rpm for fine screening. The exciter housing is cast from high-strength ductile iron (GGG-40 or equivalent), and the shaft is forged from 42CrMo alloy steel, heat-treated to HRC 28-32. Bearings are spherical roller type with C3 radial clearance, rated for 5,000 hours L10 life at maximum load. The unit mounts directly to the screen side plate using a flange pattern that matches most standard screen frames. This eliminates the need for separate motor bases and V-belts, reducing maintenance points and improving energy efficiency by 12-18% compared to belt-driven exciters.
Typical applications include primary and secondary screening in hard rock quarries, coal preparation plants, and iron ore beneficiation. In a coal prep plant, the NE-100 at 1000 rpm generates a 10 mm stroke on a 2.4 m x 6.1 m banana screen, handling 800 t/h of 50 mm feed. The exciter's IP55 rating means it survives the high-moisture, fine-dust environment of a wash box without additional enclosures. For aggregate producers, the NE-60 at 1500 rpm produces a 6 mm stroke on a 1.8 m x 4.8 m horizontal screen, achieving 95% separation efficiency at 300 t/h. The main pain point this solves is unscheduled downtime: traditional bolt-on vibrators loosen under cyclic loading, but the NE series uses a single-piece housing with through-bolts torqued to 450 Nm, eliminating fatigue failures at the mounting interface.
Compared to other exciters in the same force class, the NE (UE) series offers two distinct advantages. First, the gear timing is adjustable: you can change the phase angle between the two unbalanced shafts in 15-degree increments to switch between linear and elliptical motion without replacing the exciter. Second, the lubrication system is field-convertible from grease to oil. Grease is standard for ambient temperatures up to 40°C, but for continuous operation above 40°C or in high-altitude mines, an oil bath kit (part no. NE-OIL-KIT) extends bearing life by 40%. The NE-180 model, for example, is rated for 180 kN at 750 rpm and weighs 620 kg, making it suitable for 3.6 m wide double-deck screens. Smaller models like the NE-20 weigh 85 kg and fit 1.2 m wide lab or pilot screens.
- Force output from 20 kN to 180 kN, adjustable via counterweight stacks (each weight adds 5 kN).
- Bearing L10 life of 5,000 hours at maximum load, verified by ISO 281 calculation.
- IP55 ingress protection tested to IEC 60529, with labyrinth seals and Viton O-rings.
- Mounting flange drilled to SAE J518 standard, compatible with most OEM screen frames.
