Noria drum Ø 500 mm

Bucket Elevator Drum Ø 500 mm

The driven bucket elevator drum with a diameter of 500 mm is a fundamental operating component of the lower tension station (boot) for industrial bucket elevators (norias) of the NC-50 and NC-100 types. Its primary technological task is to ensure stable centering and maintain the specified tension of the multi-ply rubber-fabric belt during intensive scooping of bulk material in the working chamber.

From an engineering perspective, the outer dimension of Ø 500 mm is a kinematic constant for this equipment line. This specific diameter determines the calculated bending radius of the traction element, preventing structural delamination of the belt while ensuring the correct trajectory and speed of the buckets at the lower loading point. At the same time, the working width of the unit is a variable value and is designed individually based on the declared capacity of the line. For example, for a standard transport system of 50 t/h with a 300 mm belt, a drum with a working surface of 330 mm is manufactured. For higher-capacity units, the frame width increases proportionally to accommodate a wider belt or even a double-row bucket arrangement without changing the base diameter of 500 mm.

Design Features of the Bucket Elevator Drum

Given the specific operating conditions of the elevator's tension unit, where some product inevitably falls onto the inner side of the belt, the drum is manufactured in a slat-type (winged) design. This engineering configuration eliminates the formation of a solid contact surface between the metal and the traction element. Thanks to the technological gaps between the slats, grain that ends up between the belt and the drum passes freely through the internal space of the frame without being subjected to mechanical pressure. This technical solution preveNC the crushing and mechanical damage of grain trapped under the traction element and eliminates the formation of dense deposits or product buildup on the unit's working surfaces.

Special attention during design is paid to the geometry of the working surface. The drum slats form a precise crown (barrel-shaped) profile with a smooth increase in diameter toward the central axis. This profile creates a physical self-centering effect: under tension, the belt naturally tends to occupy the position with the largest bending radius—strictly at the center of the drum. This allows the traction element to be stably maintained in the specified trajectory without the installation of additional guide rollers or sides, significantly reducing belt edge wear and preventing friction against the inner walls of the elevator shaft during intensive operation.

Manufacturing Specifications of the Bucket Elevator Drum

The operational lifespan of the tension drum under continuous handling cycles depends heavily on the kinematic strength of its central axis. To counteract constant static bending loads arising from the high working tension of the multi-ply belt, the design is based on the use of a reinforced solid metal shaft. The spatial rigidity of the frame itself is ensured by the integration of massive internal discs (flanges), which securely bond the shaft to the outer contour of the working slats and prevent geometric deformation even under peak seasonal loads.

A critical stage of production is ensuring the absolute coaxiality of all mechanism elemeNC. The assembly and formation of the frame's weld seams are carried out using rigid part centering, which eliminates the risk of thermal distortion of the metal. The final machining of the shaft mounting seats (journals) is performed strictly to the size of the bearing supports, adhering to precise fit tolerances. This technological approach guarantees ideal rotation geometry, completely eliminating radial runout of the drum and preventing the subsequent transmission of destructive vibrations to the bearing units, tension mechanisms, and the boot housing.

Available Custom Configurations

Although the 500 mm outer diameter is a standardized value for the NC-50 and NC-100 lines, the total length of the central shaft and the diameters of its mounting seats (journals) are individual parameters. They directly depend on the housing width of the specific boot, the type of bearing units used, and the design of the tension mechanism. Therefore, drum manufacturing is typically carried out with mandatory adaptation to your equipment. The process begins with data collection: the customer provides a sketch, drawing, or actual dimensions of the drum and shaft. If there are matches in the Zavod Moroza database, a proven standard solution is used; for non-standard or modernized lines, an individual design is developed.

It is worth noting that the plant's production capacity is not limited to the serial production of 500 mm diameter tension drums. Our range includes the design and manufacture of both drive (upper) and tension (lower) drums for the entire model range of industrial bucket elevators. The final configuration of the unit, its dimensions, and the type of working surface (slat-type, smooth, or lagged) are selected based on the technical specifications of the customer's existing transport equipment.

In addition to manufacturing elevator drums, the Zavod Moroza technical base can fully meet the needs of enterprises for componeNC for grain handling systems—from traction elemeNC (belts and buckets) to power units (counter-drives and gearboxes). Our in-house engineering department allows us to perform complex calculations for the deep modernization of legacy lines or the development of new systems from scratch. This comprehensive approach allows customers to go beyond simple component replacement and systematically scale the capacity of their facilities, adapting equipment to increasing harvest handling volumes.

The finished bucket elevator drum can be supplied as a basic standalone unit or in an expanded configuration with associated parts (bearing supports, fasteners, etc.)—the final set is formed exclusively based on the current needs of your facility. Shipment is carried out directly from our plant, and if necessary, we can organize delivery to your enterprise (using Zavod Moroza's own vehicles or third-party logistics providers).

To begin cooperation, simply contact our specialists in any way convenient for you. Depending on the available input data—whether it is a standard Soviet-era elevator, equipment we have previously serviced, or a custom-built line—we will select the fastest workflow. Our goal is to ensure the continuity of your technological process. Therefore, we handle all possible engineering, production, and logistics tasks to promptly provide you with a finished, geometrically precise unit for trouble-free harvest handling that will operate effectively for many seasons.