Shaftless Screw Conveyor Horizontal Flexible Easy Maintenance
Reliable Work Rotating Screw
Application
Screw conveyor is a kind of machinery that uses a motor to drive
spiral rotation and push materials to achieve the purpose of
conveying. It can be transported horizontally, obliquely or
vertically , and has the advantages of simple structure, small
cross-sectional area, good sealing, convenient operation, easy
maintenance, and convenient closed transportation. Screw conveyors
are divided into two types, shaft screw conveyors and shaftless
screw conveyors in conveying form, and U-shaped screw conveyors and
tubular screw conveyors in appearance . Shaft screw conveyors are
suitable for non-viscous dry powder materials and small particle
materials (for example: cement, fly ash, lime, grain, etc.) while
shaftless screw conveyors are suitable for conveyors with viscous
and easy-to-wind materials. (For example: sludge, biomass, garbage,
etc.) The working principle of the screw conveyor is that the
rotating screw blade pushes the material to be conveyed by the
screw conveyor. The force that prevents the material from rotating
with the screw conveyor blade is the weight of the material itself.
The frictional resistance of the screw conveyor casing to the
material. The spiral blade welded on the rotating shaft of the
screw conveyor, the surface of the blade has solid surface, belt
surface, blade surface and other types according to the different
materials to be conveyed. The screw shaft of the screw conveyor has
a thrust bearing at the end of the material movement direction to
give the axial reaction force of the screw with the material. When
the length of the machine is long, an intermediate suspension
bearing should be added.
Parameters
| Parameters | spiral Nominal diameter (mm)
spiral dia (mm) | Type | LS-200W | LS-250W | LS-300W | LS-350W | LS-400W |
| 200 | 250 | 300 | 350 | 400 |
| 185 | 235 | 285 | 320 | 385 |
| Capacity | installation angle | 0° | 1.5 | 3.6 | 6 | 8.4 | 11.7 |
| 5° | 1.35 | 3.24 | 5.4 | 7.56 | 10.53 |
| 15° | 1.05 | 2.52 | 4.2 | 5.88 | 8.19 |
| 25° | 0.9 | 2.16 | 3.6 | 5.04 | 7.02 |
| Spiral speed n(r/min) | | 12 to 16 |
| Motor N(KW) | 0.75-5.5 (according to L and angle) |
| installation size(mm) | A | 0+40 |
| B | 0 + 110 |
| Bi | Matching with corresponding equipment |
| L | According to user requirements |
| Li | Matching with corresponding equipment |
| l_2 | (L-1000)/2-(L-71000)/3 |
| L3 | 250 | 250 | 300 | 350 | 400 |
| H | Matching with corresponding equipment |
| Hi | 140 | 165 | 188 | 210 | 240 |
| H2 | H-150 |
| H3 | | Matching with corresponding equipment |
Features and applications
screw conveyor has the following features:
1) The structure is relatively simple and the cost is low.
2) Reliable work, easy maintenance and management.
3) Compact size, small section size, and small floor space. It is
easy to get in and out of hatches and carriages during unloading
operations in ports.
4) Sealed transportation can be realized, which is conducive to
the transportation of flying, hot and strong-smelling materials,
which can reduce environmental pollution and improve the working
conditions of port workers.
5) Easy to load and unload. The horizontal screw conveyor can be
loaded and unloaded at any point on the conveying line; the
vertical screw conveyor can be equipped with a relatively
screw-type reclaiming device to have excellent reclaiming
performance.
6) It can convey in reverse, and it can also make a conveyor
convey materials in two directions at the same time, that is,
towards the center or away from the center.
7) The unit energy consumption is relatively large.
8) The material is easy to be crushed and worn during the
conveying process, and the spiral blade and the trough are also
worn seriously.
Structural features
(1) The spiral blades of the screw conveyor have three types:
solid spiral surface type, belt spiral surface type and blade
spiral surface type. The solid spiral surface is called the s
manufacturing method. The spiral pitch of the GX type is 0.8 times
the diameter of the blade. The LS type screw conveyor is suitable
for conveying powder and granular materials. The belt spiral
surface is also called the D manufacturing method, and its spiral
pitch is the same as the diameter of the spiral blade, which is
suitable for conveying powder and small materials. The blade type
spiral surface is less used, and is mainly used for conveying high
viscosity and compressible materials. During the conveying process,
stirring and mixing are completed at the same time. The spiral
pitch is about 1.2 times the diameter of the spiral blade.
(2) The screw blades of the screw conveyor have two rotation
directions, left-handed and right-handed.
(3) The types of screw conveyors include horizontal fixed screw
conveyors and vertical screw conveyors. The horizontal fixed screw
conveyor is the most commonly used type. The vertical screw
conveyor is used to lift materials in a short distance. The
conveying height is generally no more than 8m. The screw blade is a
solid surface type. It must have a horizontal screw feeding to
ensure the necessary feeding pressure.
(4) At the material outlet end of LS and GX screw conveyors, 1/2
to 1 turn of reverse screw should be installed to prevent the end
from being blocked by powder.
(5) The screw conveyor is composed of three parts: the screw
body, the inlet and outlet and the driving device.
The screw machine body is composed of a head bearing, a tail
bearing, a suspension bearing, a screw, a casing, a cover plate and
a base.
The driving device is composed of a motor, a reducer, a coupling
and a base.
Screw conveyor is a kind of machinery that uses a motor to drive
spiral rotation and push materials to achieve the purpose of
conveying. It can be transported horizontally, obliquely or
vertically , and has the advantages of simple structure, small
cross-sectional area, good sealing, convenient operation, easy
maintenance, and convenient closed transportation. Screw conveyors
are divided into two types, shaft screw conveyors and shaftless
screw conveyors in conveying form, and U-shaped screw conveyors and
tubular screw conveyors in appearance . Shaft screw conveyors are
suitable for non-viscous dry powder materials and small particle
materials (for example: cement, fly ash, lime, grain, etc.) while
shaftless screw conveyors are suitable for conveyors with viscous
and easy-to-wind materials. (For example: sludge, biomass, garbage,
etc.) The working principle of the screw conveyor is that the
rotating screw blade pushes the material to be conveyed by the
screw conveyor. The force that prevents the material from rotating
with the screw conveyor blade is the weight of the material itself.
The frictional resistance of the screw conveyor casing to the
material. The spiral blade welded on the rotating shaft of the
screw conveyor, the surface of the blade has solid surface, belt
surface, blade surface and other types according to the different
materials to be conveyed. The screw shaft of the screw conveyor has
a thrust bearing at the end of the material movement direction to
give the axial reaction force of the screw with the material. When
the length of the machine is long, an intermediate suspension
bearing should be added.
Features and applications
screw conveyor has the following features:
1) The structure is relatively simple and the cost is low.
2) Reliable work, easy maintenance and management.
3) Compact size, small section size, and small floor space. It is
easy to get in and out of hatches and carriages during unloading
operations in ports.
4) Sealed transportation can be realized, which is conducive to
the transportation of flying, hot and strong-smelling materials,
which can reduce environmental pollution and improve the working
conditions of port workers.
5) Easy to load and unload. The horizontal screw conveyor can be
loaded and unloaded at any point on the conveying line; the
vertical screw conveyor can be equipped with a relatively
screw-type reclaiming device to have excellent reclaiming
performance.
6) It can convey in reverse, and it can also make a conveyor
convey materials in two directions at the same time, that is,
towards the center or away from the center.
7) The unit energy consumption is relatively large.
8) The material is easy to be crushed and worn during the
conveying process, and the spiral blade and the trough are also
worn seriously.
Structural features
(1) The spiral blades of the screw conveyor have three types:
solid spiral surface type, belt spiral surface type and blade
spiral surface type. The solid spiral surface is called the s
manufacturing method. The spiral pitch of the GX type is 0.8 times
the diameter of the blade. The LS type screw conveyor is suitable
for conveying powder and granular materials. The belt spiral
surface is also called the D manufacturing method, and its spiral
pitch is the same as the diameter of the spiral blade, which is
suitable for conveying powder and small materials. The blade type
spiral surface is less used, and is mainly used for conveying high
viscosity and compressible materials. During the conveying process,
stirring and mixing are completed at the same time. The spiral
pitch is about 1.2 times the diameter of the spiral blade.
(2) The screw blades of the screw conveyor have two rotation
directions, left-handed and right-handed.
(3) The types of screw conveyors include horizontal fixed screw
conveyors and vertical screw conveyors. The horizontal fixed screw
conveyor is the most commonly used type. The vertical screw
conveyor is used to lift materials in a short distance. The
conveying height is generally no more than 8m. The screw blade is a
solid surface type. It must have a horizontal screw feeding to
ensure the necessary feeding pressure.
(4) At the material outlet end of LS and GX screw conveyors, 1/2
to 1 turn of reverse screw should be installed to prevent the end
from being blocked by powder.
(5) The screw conveyor is composed of three parts: the screw
body, the inlet and outlet and the driving device.
The screw machine body is composed of a head bearing, a tail
bearing, a suspension bearing, a screw, a casing, a cover plate and
a base.
The driving device is composed of a motor, a reducer, a coupling
and a base.
