Screw conveyors (or auger conveyors) are the core equipment in grain silos used for horizontal or small-angle grain conveying. Henan Jinrui manufactures screw conveyors specifically designed to handle the harsh working conditions in grain transportation, including grain feeding, discharging, and inter-silo transfer, thereby ensuring extremely low grain loss, minimal equipment maintenance, and continuous and stable conveying throughput.

The working principle of the screw conveyor is based on a simple yet highly efficient mechanical transmission design; its core components consist of a trough, helical blades, a helical shaft, a drive unit, and bearing assemblies. When the drive unit rotates the helical shaft, the blades—fixed to the shaft—propel the granular grains entering the trough in an axial direction, creating a continuous flow of material from the inlet to the outlet to complete the conveying operation. This design enables the screw conveyor to achieve unidirectional or bidirectional material transport without the need for complex auxiliary equipment; furthermore, by adjusting the rotational speed of the screw, the conveying volume can be precisely controlled, making it perfectly suited to meet the diverse material transfer requirements of various operating conditions within grain silos.

Henan Jinrui screw conveyor

Henan Jinrui has designed various types of screw conveyors specifically for grain silo applications. You can choose flexibly according to the storage capacity of the grain silo and the specific operating scenario.

(1) Portable Type: Portable screw conveyors are usually standard equipment in farm grain silos. They are very suitable for small grain silos on farms. They can easily complete the loading and unloading of grain silos and trucks, fully meeting the needs of modern farms for flexibility and mobility in grain transportation.

(2) Fixed Type: Fixed screw conveyors are often found in large commercial grain storage complexes. These types of screw conveyors are typically equipped with larger diameter screw blades, resulting in higher conveying capacity and enabling continuous transfer of materials between grain silos.

(3) Bottom Unloading Type: The bottom screw conveyor is designed specifically for the bottom unloading condition of grain silos. This type of screw conveyor adopts a fully enclosed structure, which effectively prevents dust leakage; its blades are treated with wear-resistant and corrosion-resistant materials, which can effectively prevent material from clogging at the bottom of the grain silo. This design ensures a smooth and uniform unloading process with minimal grain residue in the grain silo, making silo unloading more automated and worry-free.

Screw conveyor for grain silo

(1) Compact Structure: With a compact design and small footprint, the screw conveyor requires no complex installation space.

(2) Excellent Sealing: The fully enclosed trough design effectively prevents dust dispersion and material leakage during grain conveyance, minimizing product loss and ensuring a clean, hygienic working environment.

(3) High Versatility: Highly adaptable, the screw conveyor can handle a wide range of grains—including wheat, corn, paddy rice, and rapeseed—and supports multi-point intermediate loading and unloading.

(4) Stable and Safe Operation: The controllable conveying speed and enclosed structure reduce safety risks caused by grain friction and impact, lower the potential for dust explosions, and provide more reliable protection for grain storage operations.

Screw conveyor for grain conveying

Using the screw conveyor the right way and keeping it in good shape helps it work well for a long time. When you choose a screw conveyor, the screw size and turning speed depend on how big your silo is and what type of grain you are moving. Before you start it each day, check that the screw shaft turns freely and the bearings have enough oil. Do not overload it, or the motor may burn out and the conveyor may get blocked. After you turn it off, take out any leftover grain from the trough so it does not clump or go bad. For maintenance, often check the screw blades for wear, and fix or replace badly worn ones. Check bearings and seals from time to time to stop oil from leaking out and dust from getting in. Also, for units that run on electricity, check that the electrical parts are dry and have good insulation to keep things safe.

In short, from small farm granaries to large commercial grain storage facilities, screw conveyors have long been the core equipment for transporting grain inside granaries. Henan Jinrui's screw conveyors are simple in structure, highly efficient in conveying, and easy to adapt to various layout requirements. If needed, please feel free to contact us to discuss and determine the most suitable screw conveyor configuration for your grain silo project.