Screw Conveyor

Introduction of Screw Conveyor

Screw Conveyor is mainly used for horizontal, inclined or vertical conveying of powdery, granular and small block materials, such as cement, concrete, fly ash, coal powder, grain, etc., widely used in chemical industry, building materials, metallurgy, coal, electric power, grain , food and other industries. Dahan Screw Conveyor equipment has many specifications and models, and can be customized according to the user's requirements for conveying materials, conveying length and conveying volume.

Screw Conveyor Videos

conveying sawdust

Conveying Slurry Mud

Screw Conveyor Application

Screw Conveyor can be used in grain, food, chemical, wood, agriculture, building materials and other industries to convey powdery, granular, and small lump materials, such as: flour, grain, wheat, sawdust, feed, cement, fertilizer, sand, coke, coal Powder, ashes, etc.

Screw Conveyor Classification

Tubular Screw Conveyor: welded seamless steel pipe, pipe wall thickness ≥10mm, powder/granule/small material conveying equipment, conveying capacity: 142 cubic meters per hour, conveying length: 40~70 meters, pipe diameter: 100mm~1250mm

U-shaped Screw Conveyor: Short distance/small inclination to convey bulk materials, conveying capacity: 134 cubic meters per hour, length: 10-20 meters, pipe diameter: 200mm-600mm.

Double-shaft Screw Conveyor: The two helical blades rotate in opposite directions, which can prevent material clogging and can mix/stir the material, The conveying capacity is large, 1.5-2 times that of a single shaft; conveying capacity: 458 cubic meters per hour; length: 2-70 meters.

Shaftless Screw Conveyor: no central shaft, specially designed for viscous/easy-to-wind materials; the conveying capacity can reach 458 cubic meters, which is 1.5 times that of the shafted screw conveyor, and the conveying length: ≤15 meters.

Horizontal Screw Conveyor: Horizontal or slightly inclined (20°) conveying small particles/powder/small block materials, conveying capacity: 9-140t/h.

Vertical Screw Conveyor: Convey non-sticky powdery and granular dry materials vertically (90°) or at a large inclination, conveying capacity: 140 cubic meters per hour, conveying height: 2.5-15 meters.

Inclined Screw Conveyor: ≤90° to convey various bulk materials, conveying capacity: 142 cubic meters per hour, conveying length: 1-70 meters.

Stainless Steel Screw Conveyor: Made of 304 stainless steel, clean and hygienic, in line with food and pharmaceutical industry hygiene standards.

Carbon Steel Screw Conveyor: Made of carbon steel, low cost, suitable for general material transportation.

Screw Conveyor Features

1. Adopt small diameter, variable pitch design, high speed, can transport 458 cubic meters of powdery, granular and small block materials per hour, and the conveying length can reach 70 meters.

2. The head and tail bearings are moved to the outside of the casing, eliminating the possibility of reducing the life of the bearings due to material leakage due to poor sealing.

3. The intermediate suspension bearing adopts two interchangeable rolling and sliding structures, both of which are equipped with dust-proof sealing devices, using labyrinth seals, and the seals are made of nylon and plastic king, which has strong sealing performance and good wear resistance. Sliding tiles need to be added Lubricant cast copper tiles, alloy wear-resistant cast iron tiles and copper-based graphite oil-less lubricating tiles, the bearing life can reach 10,000 hours.

4. The surface of the spiral blade is coated with wear-resistant materials, and its service life can be doubled compared with conventional blades.

5. The transmission part adopts a cycloid reducer, which has low noise, strong adaptability, and convenient operation and maintenance.

How does the Screw Conveyor work?

Screw Conveyor Technical Parameters

LS type	100	160	200	250	315	400	500	630	800	1000	1250
GX type			200	250	300	400	500
Spiral diameter (mm)	100	160	200	250	315	400	500	630	800	1000	1250
Pitch (mm)	100	160	200	250	315	355	400	450	500	560	630
Speed (r/min)	140	120	90	90	75	75	60	60	45	35	30
Delivery capacity QΦ=0.33 (m³/h)	2.2	7.6	11	22	36.4	66.1	93.1	160	223	304	458
功率Pd 1=10m（KW）	1.1	1.5	2.2	2.4	3.2	5.1	4.1	8.6	12	16	24.4
Power Pd 1=30m (KW)	1.6	2.8	3.2	5.3	8.4	11	15.3	25.9	36	48	73.3
Speed (r/min)	120	90	75	75	60	60	45	45	35	30	20
Delivery capacity QΦ=0.33 (m³/h)	1.9	5.7	18	18	29.1	52.9	69.8	125	174	261	305
Power Pd 1=10m (KW)	1.0	1.3	2.1	2.1	2.9	4.1	4.7	6.8	9.4	14.1	16.5
Power Pd 1=30m (KW)	1.5	2.3	4.5	4.5	7	8.9	11.6	20.4	28.3	42.2	49.5
Speed (r/min)	90	75	60	60	45	45	35	35	30	20	16
Delivery capacity QΦ=0.33 (m³/h)	1.4	4.8	15	15	21.8	39.6	54.3	97	149	174	244
Power Pd 1=10m (KW)	0.9	1.2	1.9	1.9	2.5	3.4	4.3	5.4	8.1	9.5	13.3
Power Pd 1=30m (KW)	1.2	2.2	3.8	3.8	5.4	6.8	9.2	16	24.4	28.6	39.9
Speed (r/min)	75	60	45	45	35	35	30	30	20	16	13
Delivery capacity QΦ=0.33 (m³/h)	1.2	3.8	11	11	17	31.7	46.5	73.0	99.3	139	199
Power Pd 1=10m (KW)	0.75	1.1	1.6	1.6	2.1	3.1	3.7	4.6	5.7	7.7	11
Power Pd 1=30m (KW)	1.1	1.8	3.4	3.4	4.4	5.6	8	14	16.7	23.2	33

Screw Conveyor Structure

Screw Conveyor consists of three parts: conveyor body, material inlet and outlet and driving device. The spiral body is composed of three parts: the head section, the middle section and the tail section.

Driving device: Q series reducer + Y series motor, YTC gear reduction motor.

Feeding and discharging device: There are four kinds of feeding port, square discharging port, hand-push discharging port and rack-type discharging port. Openings are welded on the body by the user at the site of use. When arranging the positions of the inlet and outlet ports, care should be taken to ensure the distance from the feed port to the end, and at the same time avoid the contact between the feed port and the oil cup of the hanging bearing, the connecting flange of the casing, and the base.

Screw machine body: the head section is equipped with thrust bearings to bear the axial force, and the middle section and tail section are equipped with bearings to support the screw shaft. At the same time, there is an axially movable radial bearing in the tail joint of the Screw Conveyor to compensate for the error in the length of the screw shaft and adapt to temperature changes.

Screw Conveyor Dimensions

Key points of Screw Conveyor selection

1. Conveying materials: Material properties including water content, corrosiveness, temperature, abrasiveness, etc. determine the selection of Screw Conveyor material and blade type. The common materials of conveyors can be divided into carbon steel and stainless steel, and can be divided into shaft and shaftless according to the difficulty of material transportation.

2. Conveying volume: The size of the conveying volume determines the selection of the Screw Conveyor model. Users with a large conveying volume can choose a larger model of Screw Conveyor, with a diameter from 100 to 1250mm, and the conveying capacity can reach 458 cubic meters per hour. Choose the appropriate model for the size.

3. Conveying inclination angle: The conveying angle affects the selection of motor power and pipe wall thickness. The larger the conveying angle, the greater the motor power, and the corresponding pipe wall thickness should also increase.

Note: GX type inclination > 20°, LS type ≤ 15°.

4. Conveying distance: When choosing a conveyor, the conveying distance should also be explained. The conveying length of a single Screw Conveyor can reach 60 meters, and it can also be designed according to user requirements, but the corresponding components should also be adjusted.