Vertical Screw Feeder

Introduction of Vertical Screw Feeder

Vertical screw feeder is used to move materials in the vertical direction, it is the most economical and space-saving solution for conveying powder or granular materials from the lower level to the higher level, the vertical height can reach 8 meters, usually used for limited space or needs Transport materials to higher-level applications such as grain elevators or food processing plants.

The vertical screw feeder consists of a horizontal feed screw and a vertical screw. The horizontal feed screw consists of a short pipe section, which is fed from a silo or hopper or fed by an upstream feeding device. Vertical section helical tubes usually consist of one long tube, connected to the outlet of the horizontal feed helix, a sloping outlet at the top, end flanges welded to each conveying pipe section, rotation in one or more sections screws, with couplingings at each end, base bearing assemblies with sliding bushings, and some intermediate hanger bearings (if required for the overall height of the conveyor), with integrated end bearing assemblies (where the screw hangs top) and a self-adjusting shaft-sealed top mounted drive unit is suitable for this application for transferring powder or granular material from low to high.

Types

Q235 carbon steel: The most conventional material type, general materials are common, no special properties, generally do the whole machine spray paint to prevent excessive rust and corrosion.

SS304 stainless steel: Corrosion-resistant, rust-free, and hard-wearing, the material does not contain harmful substances, it can be used for the transportation of food or medical materials, and it can also be used in the chemical and environmental protection industry.

Fixed vertical screw feeder: fixed production site transportation, strong stability.

Mobile vertical screw feeder: Added mobile wheel design, which can be quickly arranged and stowed, suitable for use in situations where the site changes frequently.

Technical parameters

There are a variety of vertical screw feeders available for you to choose from. If you have special needs, we will design them free of charge according to your actual situation.

Spiral diameter (mm)	Screw speed (r/min)	Delivery capacity (m³/n)	Conveying height (m)
KLS200	200	350	2.5-15
KLS250	250	300	2.5-15
KLS300	315	2808	2.5-15

special design

Video

Application

Vertical Screw Feeder is used in the situation where your space is limited but the material must be lifted. It is very effective in conveying most powdery and granular materials. However, due to the influence of the lifting height, some materials will inevitably retreat, making They have requirements on the state of the material being delivered, and in general, the Vertical Screw Feeder is good at improving the following materials:

1. Granular to powder

2. Free-flowing to slightly viscous

3. Density from 1010 PCF to 50 PCF (medium density)

4. Dried to materials with low water content

5. Low abrasion and not easy to break

6. Non-perishable

Specific examples: grain, feed, cement, chemical raw materials, flour, sugar, lime, etc.

There are always exceptions to everything. Some materials require specific judgment. You can consult the manufacturer.

materials	Lifting height（meters）	Conveying capacity (t/h)	model
Sand	6	6	LC273
Iron oxide	7	1	LC219
coffee powder	4	1	LC159
Soybeans	5	5	LC160
Aluminum block	4	1	LC245
salt	1.5	5	LC219
catalyst	4	10	LC315

Features and Benefits

1. Space-saving design: materials can be conveyed vertically, thereby saving valuable floor space in production or processing facilities, which is especially important in areas with limited space or height restrictions.

2. Efficient conveying: The silo can hold 100-300kg of material, the hourly conveying volume can reach 140 cubic meters, and the material can be lifted to 8 meters.

3. Versatility: Can be customized to handle a variety of materials, including powder, granular, sticky or abrasive materials. They can also be designed to handle different capacities, discharge heights and material types.

4. Low maintenance: low maintenance cost, few moving parts and minimal wear and tear. This helps reduce maintenance costs and downtime, thereby increasing productivity.

5. Customizable design: Can be customized to fit existing production systems and can be designed with various discharge options such as hoppers, chutes or valves. This enables manufacturers to tailor the feeder? to their specific needs and optimize its operation.

Comparison of Vertical Screw Feeder with Bucket Elevator and Large Angle Belt

project	Vertical Screw Feeder	Vertical Bucket Elevator	Climbing Belt Conveyor
Floor area	the smallest	smaller	maximum
Delivery angle	90°	90°	Generally used for inclined conveying below 70°
Delivery capacity	good	excellent	good
Suitable material	granular or powdery material	Dry bulk material, no special requirements	Parcels and other large-volume products or fruit and vegetable foods, etc.
Advantage	Small footprint, no dust flying	Capable of substantial vertical lift of 40m	Simple structure, the least cost among similar lifting and conveying products
shortcoming	Stricter requirements on the materials to be transported	The price is higher, and high-value or large-volume production can achieve the best cost performance	Not suitable for conveying powder or fine particles, not recommended for vertical conveying

Vertical Screw Feeder horsepower calculation formula:

1. The horsepower required to drive the Vertical Screw Feeder with no load

HPf=（L*N*Fd*Fb）/1000000

2. The horsepower required to push the conveying material:

HPv=（Cw*L*Fv）/1000000 or HPv=（Cv*W**L*Fv）/1000000

3. Total shaft horsepower:

HPt=[（HPf+HPv+Fi）*Fo]/e

Symbol meaning：
L	Vertical Lift Height	N	Conveyor Speed
Fd	Diameter Factor	Fb	Bushing Factor
Cw	Conveyor Capacity (Pounds per Hour)	Cv	Conveyor Capacity (Cubic Feet per Hour)
W	Density (Pounds per Cubic Foot)	Fv	Material Horsepower Factor (From Materials Table)
Fi	Incline Factor	e	Motor Efficiency
Fo	Overload Factor (Correction for calculated horsepowers of less than five horsepower)
The above are the calculation formulas under ideal conditions, and the specific design is based on the actual suggestions given by Dahan Machinery.

Structure of Vertical Screw Feeder

Vertical screw feeder is composed of driving device (motor, reducer, coupling), screw, bearing, trough, feed port, discharge port and so on.

Driving device: Generally, there are two types of layout:

① Top drive: suitable for occasions with low conveying height and occupy a small area;

② Bottom drive, suitable for occasions with high conveying height, with large footprint.

Material inlet and outlet: The required inclination angle can be made according to the situation of the work site, and it can be connected and fixed with other supporting equipment.

The vertical screw feeder is a rotating screw blade that pushes the material for conveying by the screw conveyor. The low speed required for the vertical screw to push the material upward is called the critical speed. In the case of running and meeting the requirements of the conveying capacity, choosing a lower speed can reduce the wear of the material on the spiral blades and the casing, so as to improve its service life.

Selectable options

Depending on the specific application and material handling requirements, vertical screw feeders are available in a variety of options. Here are some common options:

Screw Design: Can be designed in different types of screw configurations such as single screw or multiple screws. Screws can also be designed with different pitches, diameters and flight configurations to optimize material transport and handling.

Shell Design: The shell or pipe can be designed with different materials and configurations according to the material to be conveyed. Housing materials can include carbon steel, stainless steel, or plastic, and can be designed in a variety of thicknesses and diameters.

Discharge options: Can be designed with different discharge options such as hoppers, chutes or valves. Discharge options can be customized to meet the specific needs of the application and can be designed to regulate the flow of material.

Motor and Drive Options: Motor and drive systems can be customized to meet application-specific requirements. Options may include variable frequency drives, motor starters, and explosion-proof motors for use in hazardous environments.

Control and Automation: Can be equipped with control and automation systems to optimize material handling and increase operational efficiency. This may include sensors, etc.

Safety features: Safety features such as guards, emergency stop buttons, and warning signs can be designed to prevent accidents and injuries.

Vertical Screw Feeder Dimensions Chart

VERTICAL SCREW FEEDER - DIMENSION TABLE
	Ø C
	114	139	168	193	219	273	323
A	Variable on demand min.800		Variable on demand min.1500			Variable on demand min.2000
M	330	330	460	460	520	520	670
E	120	130	160	175	190	215	240
F	150	150	200	200	200	200	200
G	350	350	440	440	500	550	550
H	Variable on demand
W	215	215	285	285	355	355	355
U x V	155x90	155x90	205x125	205x125	205x160	205x160	255x200
T	Variable, max. 1040		Variable, max. 1390			Variable, max. 1600
Z	Variable, max. 515		Variable, max. 690			Variable, max. 890

Solutions by Industry

Explore more vertical lifting equipment

Vertical Bucket Elevator：



It is suitable for large-volume granular, block, irregular or fragile bulk materials, with a small footprint and a large height lift of 40 meters. There are various forms.

Climbing Belt Conveyor



The simplest lifting equipment, 30°-90° inclined vertical conveying, with minimal budget, for transporting parcels, granules or bulk products, the conveying capacity decreases with the increase of slope.

• 

  Vertical Screw Feeder for feeding the silo

• 

  Vertical Screw Feeder with belt conveyor for food processing plants