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- Gess - Wastewater Worm Pumps
Gess - Wastewater Worm Pumps
The pumps (original designation YBA) are designed for the transport of heavily contaminated liquids, sludges, etc. with a temperature of up to 50 ° C. They have the ability to transport liquids with larger or even fibrous admixtures without the need for their prior mechanical pre-cleaning. They are designed for inclinations of 30 to 38. They belong to the group of lifting pumps. They are simple robust constructions, with high operational reliability, long service life, simple operation and high efficiency.
Screw pumps are designed primarily for pumping sewage in wastewater treatment plants, pumping in the sewer network and everywhere where it is necessary to transport heavily contaminated liquids and sludge containing solid impurities. Automatic regulation from zero to maximum allows you to economically pump a variable amount of liquid depending on the level of the inflow level. With automatic control, the pumps have a high efficiency over a wide range of pump flow.
The screw pumps work in such a way that the rotor rotating in the chute is immersed at the lower end in the liquid, which it absorbs into the closed spaces formed by the walls of the screw and the chute. The liquid is moved from the inflow level to the outflow level.
Screw pumps consist of a screw rotor inclined 30 to 38 to the horizontal plane, which is mounted in an upper and lower bearing, and a half-cylindrical trough.
The rotor (screw) consists of a tubular shaft with flanges on which the blades of two or three-pass screws are welded. At the upper end, the rotor is provided with a pin for its mounting in the bearing and for wedging the coupling. The lower end is also terminated by a pin having a replaceable sleeve.
For small pumps, the semi-cylindrical trough is made of sheet metal with a built-in spray bar and feet for fixing to the base. For large pumps, the trough is made of concrete, which can be lined with abrasion-resistant tiles (basalt, etc.) or stainless steel sheet as required. On the left side of the concrete gutter (when viewed from the drive) there is a spray bar.
The upper bearing absorbs axial and radial force, is rolling, lubricated with lubricating grease.
The lower bearing is sliding, fitted with a replaceable sleeve and lubricated with grease using a lubricator located in the engine room.
The main parts of the pump are usually made of structural steel class. 11, less stressed gray cast iron parts. The surface design made of structural steel can be provided with zinc plating and provided with a suitable coating. The auger, tube, spray bar and chute can in special cases be made of stainless steel.
The pumps are clockwise (when viewed from the drive side). The drive is performed by an electric motor via a gearbox. Geared electric motors are used for small screw pumps. Flexible couplings are inserted between the individual parts of the drive and the pumps. Screw pump designs are processed separately for each length. A binding dimensional sketch is also issued for each.
The pumps are manufactured in two dimensional series:
- * in the standard dimensional range of outer diameters of screws and
- * in a number of diameters graduated by 100 mm.
Diameters and lengths can be adjusted in special cases according to customer requirements or according to the real situation on the construction site.