Detailed Product Description

NEC  Electromagnetic Hammers are the perfect solution for Bulk Material Handling Problems in Spray Dryers, Bins, Hoppers, Cyclones, etc. The Electromagnetic Hammers are great for applications where sticky, clinging, or fine materials adhere or build-up on the inner surface of the container wall. They are compact, maintenance-free, and operate better than any other hammering system on the market today.

NEC Electromagnetic Hammers consist of a stator and rotor, which are made out of high-grade strip lamination to minimize iron losses. There are two salient poles on the stator over which excitation coils are placed. When the hammer is excited by a short duration electrical pulse, the rotor takes the position of minimum resistance to the magnetic path. The part movement of the rotor shaft is directly transmitted to the

hammer stroker. The stroker, in turn, hits the hopper with strong force and returns to its original position.

The excitation of the hammer coil is controlled by an electronic controller. A control panel with a sequential timer is required for the operation of the hammering system. Design of the control panel depends on the model and number of hammers to be installed on the container.

SELECTION GUIDE FOR THE ELECTROMAGNETIC HAMMER

Selection of Electromagnetic Hammer depends on various factors such as the

container wall thickness, design of stiffeners, type of product, etc. As a general guide-line use:

Model NEH-S for container wall thickness less than 2 mm

Model NEH-50 for container wall thickness 2 mm to 3 mm

Model NEH-75 for container wall thickness 4 mm to 8 mm

Model NEH 75B for container wall thickness > 8 mm

Note: Number of hammers depends on the geometry of the container.

A control panel with a sequential timer is required for the operation of thes

hammering system. Design of the control panel depends on the model and

number of hammers to be installed on the container.

Bridging

Electromagnetic Hammer designed to break up bridging by providing powerful impacts to the

sidewall of the container.

Arching

By creating powerful vibrations Electromagnetic Hammer loosens material and breaks

arches allowing free flow.

Rat Hole

Shaking the sides with cycled impacts insures constant flow of material and avoids rat holing.

Adhesion

Shakes down material stuck to the walls, allowing complete emptying of the container.

Clogging

Concise impact of Electromagnetic Hammer breaks up material & clears throat of build-up

allowing free flow.

INDUSTRIES SERVED

Milk Powder Grains Flour Salt Sugar Coffee Tea Dehydrated Food Products

Pharmaceutical Excipients

Metals

and Minerals

Ores of all types Coal (coke, mined, all grades) Phosphates Zinc Soda Ash Sand (all types)

Kaolin Fly Ash Lime, Cement & Clay Copper Gypsum Lead Limestone Aluminum

Other

Plastics Powdered Paints Detergents Fertilizers Resins Adhesives      Carbon