Screw conveyor

Screw Conveyor by Zavod Moroza

The screw conveyor is a key component of highly efficient closed logistics for bulk materials at modern agro-industrial and processing enterprises. The principle of continuous operation of this unit is based on the kinematics of translational movement of the working mass through the rotation of a steel spiral inside a stationary guide housing. In complex technological schemes where strict spatial constraints prevent the installation of bulky belt trestles or chain (scraper) systems, a screw for grain or other bulk loads serves as the optimal and often unrivaled engineering solution. Due to its compact cross-sectional dimensions and the possibility of precise route design at any required angle of inclination, this equipment ensures high transport chain throughput with a minimal integration footprint within the existing architecture of the elevator complex.

Housing Types of the Zavod Moroza Screw Conveyor

The choice of housing design for a screw conveyor for grain or other bulk loads is determined by the specific technological line requirements and the spatial configuration of the route. Zavod Moroza manufactures conveyors in two basic modifications: enclosed tube and U-shaped trough:

• Tubular housing is the optimal solution for inclined transportation (at angles up to 45–60 degrees) and systems requiring a high degree of sealing. The closed circuit eliminates product spillage and blocks the release of fine dust into the environment, which is particularly important for compliance with sanitary standards and fire safety requirements inside elevator premises.
• Trough design (U-shaped) is primarily used on long horizontal sections. The main advantage of this architecture is the presence of quick-release top covers along the entire length of the mainline. This provides service personnel with instant inspection access for sanitary cleaning, visual monitoring of the spiral's condition, and rapid removal of foreign objects without the need to dismantle entire shaft sections.

Regardless of the cross-sectional shape, every screw conveyor for grain is manufactured from wear-resistant sheet steel using high-precision CNC bending, which guarantees strict adherence to alignment tolerances and maintenance of the calculated clearance between the housing and the screw edge - a factor that directly affects the unit's efficiency.

Conditions for Safe Grain Movement via Screw Conveyors

In the agro-industrial environment, there is a common technical stereotype that the screw transportation method is inevitably accompanied by a high percentage of mechanical product damage. However, a professionally designed grain screw is capable of neutralizing this risk. The primary factor for gentle handling is precisely verified geometry of the working component and strict kinematic control. The engineering department at Zavod Moroza pays great attention to calculating the technological clearance between the outer edge of the steel blade and the inner wall of the housing. This parameter is calibrated individually, strictly accounting for the average fraction size of the transported agricultural crop. A mathematically precise clearance, combined with the perfectly smooth surface of the spiral, significantly reduces the possibility of pinching, grinding, and crushing of the material during its translational movement. An additional guarantor of integrity preservation, especially when working with delicate materials, is the limitation of flow velocity. Careful selection of the shaft rotation speed through the adjustment of the gear ratio prevents the occurrence of excessive centrifugal forces, ensuring smooth, uniform, and safe movement of the bulk mass.

Reliability of the Grain Screw Conveyor Drive Unit

Uninterrupted operation and a high service life of the equipment directly depend on the reliability of the drive station and the precision centering of rotating elements. The screw conveyor of our production can be equipped with industrial gear motors with a high safety margin, ensuring stable torque transmission even under peak (starting) loads when the working circuit is completely filled.

One of the priorities for Zavod Moroza engineers is the design of long-distance mainlines. When the transport route exceeds 4–6 meters in length, there is a risk of the support shaft sagging under its own mass and the weight of the moved product. To eliminate radial runout and prevent friction of the spiral against the housing walls, specialized intermediate (hanger) bearings are utilized. Furthermore, the bearing units are equipped with a multi-level sealing system, guaranteeing absolute isolation of the rolling elements from the penetration of abrasive agricultural dust. This structural solution ensures perfect screw centering throughout the conveyor, reduces vibration levels, and significantly increases the service intervals of the screw conveyor.

Multipurpose Application of the Zavod Moroza Screw Conveyor

While the priority task of our equipment is the safe and gentle handling of agricultural crops, the screw conveyor for grain designed by Zavod Moroza possesses high potential for inter-industry integration with minor modifications. The mechanical strength and technical characteristics of the units allow for the effective use of screws for the continuous transportation of a wide range of bulk, powdered, and small-piece materials. The equipment is easily adapted for operation with aggressive or heavy media - from animal feed, fuel pellets, and flour to industrial loads such as cement, mineral fertilizers, and polymer raw materials.

Zavod Moroza does not limit itself to the sale of cookie-cutter units; our engineering department performs a deep analysis of the customer's technological process, carrying out precise calculations of the required productivity, route geometry, and drive station power. By ordering a screw conveyor from our enterprise, you receive a reliable, durable, and energy-efficient mechanism manufactured in compliance with all current industrial standards. The modular architecture of our conveyors guarantees high maintainability and provides the opportunity for rapid scaling of the production line in the future.

To coordinate an individual technical assignment, calculate node specifications, and arrange direct delivery, contact the specialized experts at Zavod Moroza - we will provide your enterprise with reliable tools for continuous in-plant logistics.