Position:

Structure and characteristics of screw conveyor

2023-07-20
Pageviews:
Share:
A screw conveyor is a conveying device that uses the rotation of spiral blades to push loose materials forward along the casing.

1、 Structure of screw feeder
It is composed of driving device, casing, cover plate, spiral shaft, spiral blade, feeding port, feeding port, and other components.
1. Spiral blade: It can be divided into several forms, including full blade type, belt blade type, paddle type, toothed type, etc.
Full blade type: With simple structure and strong conveying capacity, it is suitable for conveying dry particles or powder materials, and has good dispersion performance. It is a widely used blade type.
Paddle type spiral blade: It has a strong mixing and stirring effect while completing the conveying operation. For example, used for circular sieves, separating blades and kernels of milling machine mixers.

The blade type and tooth type are less commonly used in oil processing plants.
2. Enclosures: There are two forms of "U" row enclosures and circular enclosures, with circular enclosures mainly used as raw materials for sealing equipment. The twisted dragon of a circular casing is also known as a sealed twisted dragon.
3. Screw shaft: hollow, made of steel pipe, with high strength, light weight, and convenient connection. Use a small section of solid shaft at the connection between the shaft and where bearings are installed. Extend the solid shaft into the hollow shaft at the connection point, and use high-strength bolts to thread in the direction perpendicular to each other between the hollow shaft and the solid shaft, fixing the connecting screw shaft.

2、 Characteristics of screw conveyors
Advantages: Simple structure, low manufacturing cost, convenient maintenance, good sealing of the machine tank, multi-point feeding and unloading, one conveyor can simultaneously transport materials in two directions, and during the transportation process, it can also carry out processes such as mixing, stirring, loosening, heating, and cooling of materials.
Disadvantages: During the transportation process, the friction between the material and the shell and the spiral body, as well as the stirring and flipping of the spiral body on the material, leads to easy wear of the groove and spiral blades, and has a certain crushing effect on the material, resulting in high power consumption during transportation. The screw conveyor is sensitive to overload and needs to be fed evenly, otherwise it can easily become clogged. When the screw conveyor is tilted or vertically arranged, its conveying efficiency will be greatly reduced; The conveying length is limited.
Therefore, it is commonly used for horizontal short distance transportation. The conveying length is generally less than 40m, and the vertical conveying height is generally not more than 8m; Not suitable for conveying long fiber like, hard, large blocks, easily bonded into blocks, and easily broken materials.
Recommended news
Ultrasonic rotary vibrating screen
Application and Development of Ultrasonic Anaerobic Screening Technology in Powder Metallurgy Industry
The ultrasonic anaerobic screening technology uses an ultrasonic transmission system to transmit ultrasonic energy to the screen, disrupting the surface tension of the screen, avoiding the adsorption of ultrafine powder, reducing the probability of screen blockage, and promoting the screening or grading of ultrafine powder or easily adsorbed powder through the screen
View More+
rotary vibrating screen
Efficient screening solution to meet German customers’ requirements for pea classification
In order to meet the requirements of German customers for pea grading, we offer you an efficient screening solution. We recommend using a rotary vibrating screen with three layers in diameter, equipped with woven meshes with apertures of 9mm, 7mm and 5mm. The parts in contact with the material are made of 304 stainless steel.
View More+
vibration motor
Working principle of horizontal motor
Horizontal vibration motor is a common vibration equipment, widely used in chemical industry, metallurgy, mining and construction industries. It uses a combination of asymmetrical weight fit and opposite steering to achieve vibration, and can control the vibration amplitude and frequency by adjusting the weight and rotational speed.
View More+
welconme
your inquiry
Copyright © Xinxiang Dayong Vibration Equipment Co., LTD.
Technical Support: COVERWEB