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Some details information about Apron Feeder Construction


Apron feeder is one new type of feeder equipment, DSMAC custom-built machines are designed to suit individual requirements of capacity, size and material handled. Our apron feeder also has an integral matching scraper conveyor with built-in drive to handle spillage. In mining industry, the apron feeder is necessary, so it is better to know some details of apron feeder,such as the apron feeder construction.


The composition of apron feeder include frame, impact rails,Head shaft and sprockets, Tail shaft and traction wheels, Bearings, Lubrication, Carrier rollers, Return rollers, Chain, Drive systems,Hydraulic drive, Manganese steel flights.

The frame is welded, with rolled-steel longitudinal beams and cross members for rigid support of the carrying rollers.Modular carrier roller support frames are bolted to the cross beams for ease of removal and installation.

Impact rails incorporate Bolt on Bump Rail design for ease of maintenance and replacement. These are fitted to the feeder frame to prevent permanent distortion of the flights under severe impact loading. Clearance is maintained between the underside flight ribs and the impact rail to prevent the flights dragging on the rail during normal operation. These heavy-gauge structural members add rigidity to withstand the impact loads during loading.


Head shaft and sprockets
Segmental hardened steel sprockets are machined at the mounting interface with the sprocket hubs. The hubs are keyed to the drive shaft.Sprockets incorporate a hunting tooth design which have the effect of increasing the life of the sprockets.The segmented sprockets can be easily reversed for increased life.

Head shafts are high-strength steel and sized to suit the load requirements. The head shafts are fully machined to take bearings, sprocket hubs, seals and the drive. The drive may be located on either side of the feeder. Twin drives can be supplied when required.

Tail shaft and traction wheels
The traction wheels are a cast steel segmented design mounted to a steel hub, to allow maintenance and removal without the need to split or dismantle the feeder chain. They are machined and mounted to the tail shaft to accurately centre and track the chain. Each traction wheel hub is attached to the tail shaft with a friction grip locking assembly.

There is minimal load at the tail end of the feeder, which assures a long life for the traction wheels.
The carrier rollers are closely spaced, standard tractor components. They are designed and manufactured for long wear and maintenance-free service. Features include lifetime-lubricated fully sealed bearings, a hardened and ground shaft fitted with a central thrust shoulder, and hardened rollers.


The return rollers support the return-strand of the flights and chain. Each roller is a modified crawler tractor carrier roller, with lifetime lubricated seals. Each roller is supported by a bracket which is bolted to the main frame for ease of removal and installation. Inspection ports located in the main beams in close proximity to the Return Rollers offer visual inspection of Rollers condition and wear, without disturbing any components Sealed and Lubricated track chains are supplied as standard to give a long working life.

Pins and bushes are hardened on the wearing surfaces. The chain links are dropped-forged for increased load capacity. Their extra-wide design and large pin-bearing area reduces wear. Chain adjustment is carried out by loosening the tail shaft bearing housing mounting bolts and then opening the double acting hydraulic take-up cylinder to eliminate slack. Once this is complete, bearing housing bolts are re-tightened.

Hydraulic drives consist of a hydraulic motor, housed directly on the head shaft, and a hydraulic power unit.

Individual feeders can be driven by their own power unit. Or several feeders can draw their power from a single source.

The power unit can be custom-designed, with stand-by filters and pumps to reduce maintenance down-time.

Our standard flights are cast work-hardening manganese steel which has properties making it ideal for high impact and abrasive conditions. The flights are ribbed on the underside for extra strength and have a machined chain mounting interface. Alloy steel bolts fix the flights to the chain. The clearance between adjacent flights is minimised to reduce leakage.

More details about apron feeder construction and operation, maintenance, you can contact us online.