What is the working preparation for screw conveyor installation?

1.The screw conveyor foundation should be completed before installation for 20 days which will make the foundation secure and reliable,and will prevent screw conveyor from sinking and deformation to ensure screw conveyor with enough stability when running.
2.The casing installation should accord with following stipulation:
(1)Allowed longitudinal straightness error is 1/1000 of length,total length error is 3mm.
(2)Allowed horizontal straightness error is 1/5000 of width.
(3)The inner wall of the casing is equal to the two sides of the screw blade,and the error is allowed to be 2 mm,the bottom interval error is ±2 mm.
(4)The connection of casing should be closely,and no interval is allowed.
(5)The casing should be fully contacted with structure support.
3.Allowed overlap error of center line between shaft and bearing is 0.5mm.
4.There should be no apparent height difference between two adjacent casings.
5.Please adjust and steady casing before tightening foundation bolts.
6.Output shaft of driven device should be in the same axis line with screw conveyor shaft.
7.If the inlet and outlet need to be installed on site,please weld them after fixing the total machine.

The key points for screw conveyor selection

1.Conveyor capacity
Screw conveyor conveying capacity refers to the amount of material per unit time.Users should consider whether the conveyor can support the use of other production equipment before design in order to design a reasonable conveyor model.
2.Conveying speed
Conveying speed can improve the transmission capacity. For conveyor which adopts chain as traction, the transporting speed should not be too fast, in order to prevent the power load increasing .
3.Component dimensions
The component dimensions of conveyor includes conveyor trough width or pipe diameter , etc. Which directly affect the transmission capacity of screw conveyor.
4.Conveyor length and inclination
Conveyor length and inclination directly affects the total resistance and required power of the conveyor. Screw conveyors installation can be level and inclined, so please let us know the using condition when select the model.
5.Screw conveyor motors
Motor selection can be speed controlled motor or general motor to control the conveying speed and throughput per hour.
6.Others
Whether hopper should be considered in the inlet or not,as well as the feeding hopper size.  

Screw Conveyor

What is the required parameter for screw conveyor model selection?

In our daily life,screw conveyor is a common used equipment.In order to ask manufacturers  to select model and quote price more quickly and accurately,we need to provide complete machine technical parameter and requirement to manufacturers. Here,PK Machinery lists the parameter needs to offer for reference:
1. Material name _______
2. Material size _______mm
3.Size distribution_______%?
4 .Material water content _______%?
5 .Handling capacity________t/h
6 .Material density ________t/m3?
7 .Material temperature _______ ℃?
8. Material is corrosive or not_______?
9. Distances between inlet and outlet ______m
10.Voltage __V__HZ 3 phase
11.Upstream and downstream equipment _______
12.Working environment _______

What Factors that Affect the Screw Conveyor Conveying Efficiency ?

The factors are listed as follows:
1.The material has great viscosity and is easy to agglomerate. 
The viscous material is easy to stick on the screw blade and the inner wall of the screw conveyor, which will increase the resistance in the process of conveying, and directly affect the production efficiency.
2.The diameter size of the screw pipe.
Under the same conditions, conveying efficiency of the screw conveyor with larger diameter is higher than the conveyor with small diameter.

3.The dip angle and transportation distance of screw conveyor.
4.The particle size, temperature, moisture, abrasion and corrosion of the material.
Specific parameters can refer to: Screw conveyors and conveying technical parameters calculation formulas.
5.The rotate speed of the screw conveyor.
The rotating speed of the screw conveyor is related to the power of conveyor motor . The working speed of screw conveyor has a close relationship with the material characteristics. High speed screw conveyor requires strict assembly, and demands a better balance. 
Further information,please click:www.pkmachinery.com

Will You Know the Reasons to Screw Conveyor Blade Damage

Will You Know the Reasons to Screw Conveyor Blade Damage

Damages may occur in the process of using screw conveyor,screw conveyor blade damage is the most common one. Here PK Machinery will discuss the screw conveyor wear in using process.
General wear parts include: hanging bearing, tail & end of the screw conveyor and screw blade,the reasons lead to wear is not only due to natural causes : temperature, environment and material, but also due to structure factor and human factor. Here, we will analyze what are the reasons leading to screw conveyor blade damage.

Generally speaking, screw conveyor is not easy to occur blocking phenomenon in the outlet, it can run at a low speed, reduce the energy consumption, design with a long conveying distance. However, when convey life garbage and organic plant, it may cause the damage of screw blade.

Thicker spiral blade will be anti- wear and durable, it is suitable for conveying materials, screw blade mainly wears in the blade edge.The farther the screw blade away from the axis of rotation, the larger the force it will bear and the more the cracks it will form.  

If you operate like this, the screw conveyor will become a pile of scrap metal soon

Are you complaining that your screw conveyor always have problems and you feel you bought a bad quality conveyor? After reading this article you will change your opinion.
Based our investigation, we find that many users operate the screw conveyor in the way. It will not only result in conveyor damage, but also harm to the operating personnel. Please avoid the following wrong operating methods in order to hope utilize the screw conveyor reasonably.
1.Open the upper cover plate during conveyor running.
Users always open the upper cover in order to observe running situation easily, however, this behavior is forbidden. During running ,if sundries fall into conveyor, the conveyor will break down, such as screw blade deformation, shaft cracking, casing damage, etc.
2.Do not clean the residual material timely after using conveyor .
If the residual material is sticky and corrosive, the blade and shaft will be corroded which will lead to a shorter service life.
3.Motor is overloaded heavily.
It can make motor temperature become too high even it will lead to motor overburning. Please control the feeding flow strictly, vibrating feeder will be a good choice.
4.Do not add lubricating oil for bearing.
The dust can make the lubricating oil become viscous, thus it will influence shaft rotating, so please add oil regularly.
5.The temperature of reducer is too high.
The reason is reducer lack of lubricating oil, please check the oil amount before conveyor running.
6.After shutting down the conveyor, the shaft is forced to stop rotating.
This behavior is very dangerous, it will harm the screw blade, shaft and motor. We should stop the screw conveyor naturally.

Please click website www.pkmachinery.com to know more details.

Lubrication of Screw Conveyor

The lubrication requirement of driving device, please see the product manual that issued by the supplier.
Oil in proper amount of 2# lubricating grease between cross slide coupling intermediate plate and half-coupling when shut down the screw conveyor.
The bearings inside the tail and head end of bearing seats should be lubricated with 3# calcium base grease, and change the grease every month.

The rolling bearing inside the hanging bearing should be lubricated with engine oil every week. Note: please not oil in lubricating grease to avoid squeezing the sealing ring outside the roiling ring away.

Above mentioned lubrication time is just the minimum requirements, detailed time should be flexible and depends on the operation condition.
 

List of Lubrication parts

No.	Name of Lubrication part	Lubrication material	Lubrication part cycle	Lubrication method
1	Coupling	2# lubricating grease	1000 hours	Lubricator
2	Bearing seat	3# calcium base grease	1 month	Lubricator
3	Hanging bearing （Rolling bearing）	Engine oil	1 week	Lubricator
4	Gearmotor	00# lithium lubricating grease	6 months	Lubricator