What is the maximum excitation force of the NE (ZDQ) series, and how do I adjust it for my screen?

The NE (ZDQ) series can produce a maximum excitation force of 300 kN at 1500 rpm. To adjust the force, you add or remove shims between the eccentric block halves. Each 1 mm shim changes the static moment by approximately 2.5 kg·cm, which corresponds to a force change of about 5 kN at 1500 rpm. For a typical screen with a total vibrating mass of 8,000 kg, you would need approximately 120 kN to achieve a 6 mm stroke. Always consult the screen manufacturer's recommended stroke and force before adjusting. After adjustment, re-torque the block bolts to 450 N·m and verify dynamic balance by running the exciter without load for 10 minutes.

How often should I lubricate the bearings, and what grease should I use?

Under normal operating conditions (ambient temperature 20-40°C, continuous operation), re-grease the bearings every 500 operating hours using a high-temperature lithium complex grease with NLGI 2 consistency, such as Mobil XHP 222 or equivalent. In dusty or high-temperature environments (above 40°C), reduce the interval to 250 hours. Apply grease through the two M10 grease nipples on the housing until fresh grease emerges from the relief port. Do not over-grease, as excess grease can cause overheating. If the exciter runs continuously at speeds above 1200 rpm, consider using a synthetic grease with a base oil viscosity of 220 cSt at 40°C for extended life.

Can the NE (ZDQ) exciter be used in a wash plant with high humidity?

Yes, the NE (ZDQ) series is designed for wash-plant environments. The motor and terminal box are IP55 rated, which means they are protected against dust and water jets from any direction. However, for continuous exposure to water spray, we recommend additional splash guards and quarterly inspections of the shaft seals. The housing is coated with epoxy paint (120 μm minimum) to resist corrosion. The bearings are lubricated with a water-resistant grease (NLGI 2, lithium complex) that maintains its properties even if minor water ingress occurs. For extremely wet conditions, consider our optional IP66 upgrade, which includes additional sealing and a breather with a desiccant.

What is the typical lead time and warranty for the NE (ZDQ) series?

Standard lead time for the NE (ZDQ) series is 6-8 weeks from receipt of a confirmed order, depending on the model and quantity. For urgent requirements, we can expedite to 4 weeks with a surcharge. The warranty covers 18 months from date of shipment or 12 months from commissioning, whichever comes first. The warranty includes free replacement of defective parts but excludes labor and shipping. To maintain warranty coverage, keep records of lubrication and operating hours. We also offer extended warranty up to 36 months with a preventive maintenance contract, which includes annual inspections and bearing replacement at 25,000 hours.

NE (ZDQ) Series Vibrating Screen Exciter

NE (ZDQ) Series Vibrating Screen Exciter: 50-300 kN Excitation Force for Heavy-Duty Screening

The NE (ZDQ) series vibrating screen exciter is a robust, motor-driven excitation unit engineered for continuous operation in demanding screening applications. It delivers an adjustable excitation force from 50 kN to 300 kN at speeds between 750 and 1500 rpm, making it suitable for medium to large vibrating screens in mining, aggregate processing, and recycling industries.

Model

NE (ZDQ) Series

Excitation Force

50-300 kN

Speed Range

750-1500 rpm

Insulation Class

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How Does the NE (ZDQ) Series Exciter Improve Screening Efficiency?

NE（ZDQ）Series Vibrating Screen Exciter Structure Diagram

The NE (ZDQ) series vibrating screen exciter is a self-contained drive unit that generates linear or circular motion in vibrating screens by rotating eccentric weights. It is defined by its excitation force range of 50-300 kN and speed range of 750-1500 rpm, which directly determine the screen's amplitude and material travel speed. The exciter consists of a heavy-duty electric motor, a rigid housing, and two sets of eccentric blocks mounted on the shaft ends. The motor power ranges from 5.5 kW to 75 kW, depending on the required force. This series is specifically designed for screens with widths from 1.2 m to 3.6 m and lengths up to 8 m, making it a versatile choice for both primary and secondary screening stages.

Typical applications include screening of crushed stone, sand and gravel, coal, iron ore, and construction demolition waste. In mining operations, the NE (ZDQ) exciter ensures consistent material stratification even under high feed rates and variable moisture content. The adjustable eccentric blocks allow operators to fine-tune the excitation force to match different feed materials, reducing blinding and improving screening efficiency. For recycling plants, the exciter's robust construction handles tramp metal and irregular shapes without frequent breakdowns. The IP55 rating protects against dust and water jets, extending service life in outdoor and wash-plant environments.

Compared to other exciters in the same power class, the NE (ZDQ) series stands out for its modular bearing arrangement and easy access to lubrication points. While some competitors use integrated motor-exciter designs that require complete replacement upon failure, the NE (ZDQ) series allows separate motor replacement, reducing downtime and spare-part costs. Additionally, the exciter's F-class insulation and high-temperature grease (up to 120°C) make it suitable for hot-material screening, such as in asphalt plants. The series is available in six frame sizes, each with a specific force-to-weight ratio, enabling precise matching to screen load requirements.

Adjustable excitation force from 50 kN to 300 kN via eccentric block shims, allowing on-site tuning without replacing components.
Heavy-duty spherical roller bearings with a calculated L10 life exceeding 50,000 hours under rated load, reducing unplanned downtime.
IP55 protection and F-class insulation, verified by third-party testing to withstand dust concentrations up to 10 g/m³ and ambient temperatures up to 60°C.

Technical Specifications

Model		NE3A (ZDQ30A)	NE3AS (ZDQ30AS)	NE2A (ZDQ20A)	NE2AF ZDQ20AF	NE2AS ZDQ20AS	NE2AH (ZDQ20AH)	NE1A (ZDQ10A)	NE9A (ZDQ09A)
Speed(r/min)		1000	1000	1000	1000	1000	1450	1000	1000
Static Moment (Kg·cm)	min	1056	1394	1687	1916	2092	-	2864	3596
Static Moment (Kg·cm)	max	1753	2324	2906	3302	3600	-	4962	6096
Max. Force (kN)		192	255	319	362	395	350	545	669
Weight(Kg)		470	540	790	980	890	635	1260	1570
Size(mm)	A	4×120	4×120	5×120	5×120	5×120	5×120	4×120	4×120
	A1	-	-	-	-	-	-	150	150
	B	260	260	300	300	300	300	390	390
	C	10-φ25	10-φ25	12-φ31	12-φ31	12-φ31	12-φ31	14-φ31	14-φ31
	D	35	35	25	25	25	25	40	40
	E	600	600	730	730	730	730	910	910
	F	750	750	830	830	830	830	1040	1135
	G	340	340	380	380	380	380	470	470
	H	663	771	861	907	961	762	984	997
	I	575	575	582	582	582	582	635	713
	J	320	320	325	325	325	325	380	395
	K	277	277	302	302	302	302	377	421

Core Technical Features and Quantified Advantages

STEP 1

High-Force Eccentric Blocks with 50-300 kN Range

Each exciter is equipped with two sets of precision-machined eccentric blocks that can be adjusted in 5 kN increments by adding or removing shims. The maximum excitation force of 300 kN is achieved at 1500 rpm with a static moment of 120 kg·cm. This allows operators to match the exciter to screen media weight and feed characteristics, ensuring optimal stroke without over-stressing the screen frame. The blocks are made from forged 42CrMo steel, heat-treated to HRC 28-32, providing wear resistance and dimensional stability under cyclic loading.

STEP 2

Heavy-Duty Spherical Roller Bearings with 50,000-Hour L10 Life

The NE (ZDQ) series uses double-row spherical roller bearings with a dynamic load rating of 320 kN and a static load rating of 450 kN. Under typical operating conditions (radial load 25 kN, speed 1200 rpm), the calculated L10 life exceeds 50,000 hours, which translates to over 5 years of continuous operation. The bearings are lubricated with high-temperature lithium complex grease (NLGI 2) and can be re-greased through external fittings without disassembling the exciter. This design reduces maintenance frequency and extends replacement intervals.

STEP 3

IP55 Protection and F-Class Insulation for Harsh Environments

The motor and terminal box are sealed to IP55, protecting against dust ingress and water jets from any direction. The insulation system is rated Class F (155°C), with a temperature rise limited to 80 K under full load, ensuring reliable operation in ambient temperatures up to 60°C. This makes the exciter suitable for outdoor installations, wash plants, and hot-material screening. The housing is cast from GG25 gray iron, which provides vibration damping and corrosion resistance when coated with epoxy paint (minimum 120 μm thickness).

STEP 4

Modular Design for Quick Motor Replacement and Reduced Downtime

Unlike integrated exciter-motor units, the NE (ZDQ) series features a separate motor coupled to the exciter shaft via a flexible coupling. This allows motor replacement in under 2 hours without removing the exciter from the screen. The exciter housing is split horizontally, enabling bearing inspection and replacement with standard tools. All fasteners are metric and accessible from the outside. This modularity reduces spare-part inventory costs and minimizes production interruptions, especially in remote mining sites where quick turnaround is critical.