Screw Conveyor Engineering Guide
The KWS Screw Conveyor Engineering Guide will provide assistance in the design of a screw conveyor or system, yielding optimum performance and efficiency.Screw Conveyor Engineering Guide – Index
- Types of Screw Conveyors
- Types of Screw Feeders
- Bulk Material Characteristics
- Component / Bearing Series
- Factors Influencing Screw Conveyor Design
- Bulk Material Table
- Screw Conveyor Capacity
- Screw Conveyor Horsepower
- Screw Conveyor Torque
- Screw Conveyor Example
- Dimensional Layout of a Screw Conveyor
- Interactive Calculators
Primary considerations for the selection of a screw conveyor are:
- Type and condition of the bulk material to be conveyed including maximum particle size and specific bulk density
- Capacity or feed rate of bulk material to be conveyed expressed in pounds per hour, tons per hour, or cubic feet per hour
- Required distance and incline the bulk material is to be conveyed
- Design conditions such as materials of construction, inlet feed conditions and operating temperature
Typical KWS Screw Conveyor
The Engineering Guide provides the necessary information for selecting a screw conveyor in a series of five steps. These steps are arranged in logical order and are divided into separate sections for simplicity.The five steps are:
- Establish characteristics of the bulk material to be conveyed.
- Determine conveyor size and speed based on capacity.
- Calculate horsepower requirements.
- Verify torque rating of components.
- Select conveyor components.
Frequently Asked Questions
What is the difference between a screw conveyor and a screw feeder?
Although they look similar, screw conveyors and screw feeders are designed for very different functions. A screw conveyor is intended to transfer bulk materials from one point to another at a consistent trough loading. The goal is to efficiently transport a constant and pre-regulated flowrate of bulk materials. Screw conveyors typically use a uniform screw pitch and always operate under control fed conditions.
A screw feeder is designed to meter bulk materials at a consistent and predictable rate. Screw feeders regulate flow from hoppers, bins, or silos into downstream equipment. To achieve accurate feeding, screw feeders use a variable screw pitch with flights that are closer together in the inlet area and flights that are further apart after the inlet. Screw feeders always operate under flood fed conditions.
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