Spiral conveyor structure characteristics

The helical conveyors are available in three types of helical blades: solid helical surface, belt helical surface, and blade helical surface. The solid helical surface is known as the S method, with a helical pitch of 0.8 times the blade diameter for the GX type, and the LS type helical conveyors are suitable for conveying powdered and granular materials. The belt helical surface, also called the D method, has a helical pitch equal to the diameter of the helical blade, and is suitable for conveying powdered and small-sized materials. The blade helical surface is used less frequently, mainly for conveying materials with high viscosity and compressibility. During conveyance, it also completes processes such as stirring and mixing, with a helical pitch approximately 1.2 times the diameter of the helical blade.

(2) The spiral conveyors feature left-hand and right-hand spiral orientations for the spiral blades.

(3) Types of screw conveyors include horizontal fixed and vertical screw conveyors. The horizontal fixed type is a commonly used model. The vertical screw conveyor is used for short-distance lifting of materials, with a lifting height generally not exceeding 8 meters. The screw blades are solid face-type, requiring horizontal screw feeding to ensure necessary feed pressure.

(4) For the material outlet of LS and GX type screw conveyors, 1/2 to 1 turn of reverse spiral vanes should be installed to prevent powder from blocking the end.

(Spiral conveyors are composed of three main parts: the spiral drum, the in and out feed ports, and the driving unit.)

The spiral machine consists of a head bearing, tail bearing, suspension bearing, spiral, casing, cover, and base, etc.

The drive unit is composed of an electric motor, a reducer, a coupling, and a base.