A decanter centrifuge consists of three main components: the bowl, the scroll conveyor, and the differential gearbox. The bowl provides the space for centrifugal separation, the scroll conveyor moves settled solids toward the discharge end, and the differential gearbox maintains the speed difference between the bowl and the scroll. These components work together to support continuous solid-liquid separation and solids discharge.
Bowl
The bowl is the main component of a decanter centrifuge. It consists of a conical section, a cylindrical section, and end covers at both ends. Its internal structure and outlet configuration affect the separation process and the discharge of solids and liquid.
Six liquid outlets are arranged axially at the larger end of the bowl. Adjustment plates control the liquid level to meet the requirements for liquid discharge. At the smaller end, eight solids outlets are arranged radially. Each outlet is fitted with a wear-resistant bushing to improve wear resistance and service life at the discharge openings.
Scroll conveyor
The scroll conveyor consists of an inner cylinder, flights, and a flange. The flights are welded to the cylinder to form a continuous helical structure. During operation, the scroll uses the speed difference between itself and the bowl to push settled solids along the bowl wall toward the solids discharge end.
The scroll flights remain in contact with the solids being conveyed, so wear resistance affects their service life. A hard alloy coating is applied to the flight surfaces to improve wear resistance.
A feed acceleration cone is installed at the scroll discharge opening. It helps reduce the impact of material entering the liquid pool and supports stable operation during centrifugal separation.
Differential gearbox
A decanter centrifuge uses a planetary differential gearbox to provide differential drive between the bowl and the scroll conveyor. This type of gearbox offers high transmission efficiency, reliable operation, and a compact structure.
The outer housing of the differential gearbox rotates in sync with the bowl, while its output shaft drives the scroll conveyor. The gearbox maintains a speed difference between the two components, allowing the scroll to move settled solids continuously toward the discharge end and supporting uninterrupted solids discharge.
Custom machining for industrial equipment components
The bowl, scroll conveyor, and associated structures in a decanter centrifuge have specific design and assembly requirements. For non-standard equipment or components designed to fit a particular configuration, Hansheng Automation provides custom precision machining based on customer supplied drawings and technical requirements.
Our drawing based machining services also cover components for other industries, including functional parts for tobacco packaging and filling machinery, as well as precision components for yachts and remote controlled racing cars. We manufacture custom parts according to the drawings provided by customers.
