| DOPPSTADT SST 725 E |  | Drum screening station |
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Drum screening station - SST 725 E
Drive
The drum is driven by 2 spur wheel back-geared motors which drive friction wheels via elastic couplings. The Vulkolan-coated friction wheels transfer their torque to the mechanically processed running surfaces of the drum. All drives are situated outside the drum drive area, making them easily accessible for maintenance and cleaning work.
Drum movement
The screening drum is mounted on axial and radial rollers. The axial rollers consist of two Vulkolan-coated heavy load wheels each on the input and output sides. The radial rollers consist of a total of 4 friction wheels, also coated with Vulkolan to ensure low-noise operation.
Base drum element
The screening drum is designed as a rolled welded structure with a wall thickness of 8 - 15 mm, depending on the application. Mesh sizes from 15 - 200 mm are available. The material transport within the drum is carried out by means of the welded-on transport screw which guarantees high screening quality. The drum jacket area is smooth so that a cleaning brush or scraper can be applied. It is possible to replace the drum from either the left or right side (for instance to change the mesh size). The running surfaces of the drum are mechanically processed to ensure high concentric precision as well as a low-wear, jolt-free load on the drive.
Machine frame / body
The basic structure of the machine frame is a profile steel tube structure onto which the various attachments for drive, rollers, protective doors and chutes are mounted. 2 large-surface protective doors are swivel-mounted on each of the long sides. When open, the drum can be lifted out from the side (for instance to replace the drum). To reduce dust and noise, the entire drum area is enclosed on top with screw-on cover plates. The roof area is equipped with pipe connection pieces and flange connections so that a dedusting facility can be connected. The basic frame includes all material guiding panels and chutes, both in the drum entrance and exit areas as well as in the fine grain collection area. The front-side material chutes are equipped with rubber inserts to minimise noise and wear.
Maintenance, inspection, repair
The drum is generally cleaned automatically by the cleaning scraper situated against the outside of the drum jacket. For special thorough cleaning, the two-panel side doors can be opened.
All lubrication work is performed from the central lubrication blocks located in the accessible area beneath the drum.
A maintenance catwalk is mounted on the machine frame on one side. The associated stairs are included as standard. Stairs and catwalks are constructed in accordance with the relevant regulations with grid panels and grid stairs. All catwalks include hand rail, foot and knee bars.
Inspection openings are provided in the machine cover at the important material transfer points. The drum exit area can be walked on.
All drives are situated outside the drum operating area, making them easily accessible for all maintenance and cleaning work. |
| |   | Short description | - Stationary drum screening station with screening drum, specially developed for systems engineering
- completely enclosed for various applications
- drum diameter 2500 mm
- drum length 7000 mm
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