Methods to install the screw conveyor before operation

In order to ensure the screw conveyor with adequate stability during operation, it is necessary to do the installed base, making it solid and reliable, to prevent screw conveyors deformation or sinking  in the process.
1.Assembled cabinet shall meet the following requirements:
(1)Longitudinal straightness tolerance of 1/1000 length, full-length straightness tolerance of 3mm.
(2)lateral straightness tolerance for the width of 1/5000.
(3)gap on both sides of the enclosure wall and the screw should be equal between, its tolerance is 2mm, the bottom of the gap tolerance of ± 2mm.
(4)casing joints should be tight fitting, do not have clearance.
(5)should be sufficient contact between the housing and the rack.
(6)Two adjacent the inner surface of the shell, their mutual joints can not be shifted significantly.
2.Axis coincides with the center line of bearing tolerance is 0.5mm.
3.screw machine sections to be safe after all adjustments, then tighten the bolt.
4.The low-speed shaft drive means and screw machine should be in a unified front axle axis.
5.Feed, spout as required site installation, then the whole machine fixed later welding.

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screw conveyor

How to Select the Suitable Screw Conveyor During the Operation?

Do you really know how to select the suitable screw conveyor during the operation?Here this article will introduce the key points as follows.Hope you have a better understanding.

U-Type Screw Conveyor

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

The Maintain Tips of Screw Conveyor

1. Check operating status of screw conveyor components regular when in use, pay attention to fasteners. If any looseness of fasteners, tight screw at once.

2. When beginning feeding by screw conveyor, should increase the feeding speed gradually to reach the rated capacity. Feeding smooth, otherwise there may be blocking in transporting materials and overload of drive device which may cause premature damage of machine.

3. To ensure requirement of non-load start, no feeding before stopping screw conveyor, and it will stop after materials in casing are completely transported.

4. No large size materials to avoid the blocking and damage of screw conveyor.

5. Pay special attention to the screw between connection shaft. If any looseness, falling down or breakage, stop the machine at once and correct it.

6. Don’t remove the cover of screw conveyor when operating to avoid accidents.

7. Add lubricating oil regular for components of screw conveyor.

(1) Reducer should be added HQ-10 lubricating oil, and change oil 3-6 month once.

(2) Bearing boxes on both ends of conveyor should use 5g lithium base lubricating grease  half a month once.

(3) Hanging bearing should use lubricating grease every 3-5 month once.

8. Check every abnormal phenomenon of screw conveyor and solve the problems. 

How to Solve the Common trouble of screw conveyor?

How to Solve the Common trouble of screw conveyor?

If the screw conveyor blockage during the operation,how do you solve the problem?Here PK Machinery would like to introduce the common troubles and troubleshooting of screw conveyor as follows.Hope you have a better understanding.

screw conveyor

1.Screw conveyor blockage

Strict enforcement of operation rules, make sure that when the machine start and stop it is no-load and feeding continuous and even or increase the outlet. The reason doing this is that solve the problem of blockage or too late to discharge avoid screw conveyor blockage.

2.Screw conveyor motor burning out

If the incoming material is too large then it will result in the motor loading is too large, the motor will heating and burning out. In order to avoid motor heating result in motor burning out you should keep feeding uniformly and finish the conveying before the machine stop.

3.Screw conveyor gives out too much noise 

If the inner shaft or both axes head occurs bend will caused friction between screw blade and tube wall. The reducer and motor will be burn out if you do not deal with the problem of screw conveyor gives out too much noise immediately.

screw conveyor

If you start the screw conveyor occurs problem of excessive noise, you should stop the machine immediately. Then take out the inner shaft of the screw conveyor to check out that whether the spindle nose bend or shaft bend. After confirming the problem then you just need to adjust it.

If you have any interest,welcome to contact us via info@pkmachinery.com or www.pkmachinery.com

 

How to Select the Suitable Screw Conveyor Model?

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 _______

screw conveyor

Thus PK Machinery can select model as per your requirement.

Further information please click:www.pkmachinery.com 

screw conveyor

Common Troubles and Solutions of Screw Conveyor

 1. Connecting bolts are easy to be broken.

Connecting bolts in head section support the torque of load motor of screw conveyor which is composed of several screws. And connecting bolts in middle and tail sections support lower torque. So bolts in head section is easy to be broken.

Solution: Use high-strength bolt in head section, or use three connecting bolts if necessary to ensure the normal operating and avoid the connecting bolts are too short.

2. Hanger bearings are easy to wear.

There are many factors affecting the wear of hanger bearing, such as working environment, conditions, property of conveying materials, structure type of hanger bearing, quality, etc. Especially when hanger bearings are buried in materials in operation, and the sealing and lubrication are not good, it is easy cause that materials enter bearing and shaft neck contact surface and make wear quickly.

Solution: Select bearings with wear resistance and high quality, and ensure good sealing and lubrication to extend the service life of hanger bearings.

3. Screw is broken because of improper installation position of hanger bearing.

Solution: Install hanger bearing which is concentric with connecting shaft, and ensure that all hanger bearings concentricity and keep the coaxility of screws. The hanger bearings should secure connection, and keep a proper gap with connecting shaft to ensure the flexible rotation of screws.

4. Blocking in inlet.

It is easy to occur blocking for materials with strong arch feature, high humidity, big blocks, etc. Especially in the situation of non-uniform feeding.

Solution: Don’t feeding the material non-conformity to the requirement. And keep uniform feeding without beating inlet.   

Further more information, welcome to contact us via info@pkmachinery.com or www.pkmachinery.com

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

screw conveyor

Why Should We Pickling of Stainless Steel Screw Conveyor?

（1）Why Should We Pickling of Stainless Steel Screw Conveyor?

In the u-type screw conveyor process, the stainless steel appearance due to the oxidation of oxidation will appear black, yellow skin.In order to improve the appearance and corrosion resistance of stainless steel, processed stainless steel must take the pickling passivation treatment.Acid pickling removes the welding and oxide produced after high temperature processing.So that it can make the surface of the stainless steel bright silver light, and the treated surface forming a layer of oxide film.And then it will not produce secondary oxygen erosion, thereby improving the quality of surface corrosion of stainless steel products , prolong the service life of equipment.

shaft of screw conveyor

（2）What is acid pickling processing?

Acid pickling processing  is one way to clean metal surface，With acid solution to remove scale and rust on the steel surface method.Metal surface after pickling was silvery white, while the passive surface and improve the corrosion resistance of stainless steel.Pickling process currently used due to the long pickling time, leading to high processing costs. In view of this situation, usually at room temperature fast pickling process. The process under room temperature can quickly remove thick stainless steel surface oxide, especially for welding black and inclusion removal effect is good, clean and bright surface after pickling, non-volatile light fading, yellowing.More information or any interest, please visit www.pkmachinery.com 

u-type screw conveyor

The Truth Reason About the Screw Conveyor Blade Damage

The Truth Reason About the Screw Conveyor Blade Damage

Screw conveyor blade is an indispensable parts of the screw conveyor which plays an important role in this kind of machinery. So know the reasons why screw blade damages is necessary and then we can adopt corresponding methods to solve it. Today PK Machinery will introduce the methods how to protect the screw blade.Wish you have a better understanding according to the following passage.

Spiral Blade

Hanging bearing, bolt ends and spiral screw conveyor blade three parts are frequently wear parts. In addition to temperature, environment, materials and other natural causes, as well as structural factors and human factors. Here, we will analyze the reasons for the screw conveyor spiral blade damage as follows.
When the screw conveyor in the event of clogging or not material discharge opening, the operator should reduce the operating speed and reduce power consumption.Screw conveyor can transport long distance,so it often uses a multi-stage series-mounted. When transport the garbage and organic plant, it will inevitably cause damage to the spiral blade.

U-type Screw Conveyor

Spiral blade wear mainly in the blade edge, the farther away from the axis of rotation, the greater the force, the number of void formation to produce the more cracks. In order to make the spiral blade wear more durable, better transportation of materials, production often thick spiral blade.
For more information,please do free to contact us via info@pkmachinery.com.
Our website:www.pkmachinery.com

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.

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

Daily Maintenance for Screw Conveyor

Screw conveyor is bulk material handling equipment, which usually consists of a tube containing either a spiral blade coiled around a shaft (sometimes called an auger), driven at one end and held at the other, it is widely used in chemical, metallurgy, paper making, and construction industries, etc. Below you will see its daily maintenance methods:

1. When operate the screw conveyor, bearings, gears and transmission chain should be added lubricating oil regularly.
2. After machine stops, the spiral blade wear condition should be checked, if wears seriously, please repair welding.

 

3. The conveying capacity can not be overloaded, or the material can’t be discharged which will cause the screw axis bends and box damages.
4.During the operation of screw conveyor, any shrill noise, please open the cover and check, eliminate the noise timely.
Hope above mentioned maintenance will be helpful!

Cement Screw Conveyor for Cement Industry

Cement screw conveyor is bulk material handling equipment, which usually consists of a tube containing either a spiral blade coiled around a shaft (sometimes called an auger), driven at one end and held at the other. The main parts include tube, shaft with spiral blades, inlet and outlet chutes, as well as driving device.

Working principle
Within a tube, the LSY screw conveyor uses a rotating helical screw blade, to move granular and powdery materials. Cement screw feeder is usually installed at a incline in many industries, such as concrete mixing station, bulk material transit storage, etc. 

Main Features
1.Simple structure, good sealing, easy operation and low power invest cost. 
2.It has the features of small screw diameter, high rotation speed and large capacity, specially suitable for inclined transport. The angle is up to 60 degree. 
3.Widely used in chemical, metallurgy, paper making, and construction industries, etc. 
4.Axle head and conveying spiral adopt spline connection, with features of convenient mounting&disassembling, large load capacity and stability. 
5.All sections of screw conveyor are connected with flange. Also screw blades are integral connection. 
6.Inlet and outlet chutes have many kinds of connections, such as flange, sack, universal joint, etc.

Selection condition

Primary considerations for the selection of a screw conveyor are as follow:    1.Type and condition of the materials to be handled, including maximum particle size, and, if available, the specific bulk density of the material to be conveyed.   2.Quantity of transported material, expressed in pounds or tons per hour.    3.The distance for which the material is to be conveyed.Below is the necessary information for the selection of a screw conveyor system, presented in a series of five

Henan Pingyuan Mining Machinery Co., Ltd is the most professional manufacturer of Belt conveyor, and Vibrating screen, Bucket elevator, Screw conveyor, Scraper conveyor using the world's most advanced technology, we are willing to serve every company to meet your custom needs. Our goal is "be the future global leader of mining machinery industry". Have any questions, please contact us without any hesitation.

Website:www.pkmachinery.com                    
E-mail: info@pkmachinery.com
Tel: +86 373 579 9188
Fax: +86 373 507 1699
Address: 289 Yellow River Road, Xinxiang City, Henan Province, China

If you want to know more information about the production of PK machinery,please pay a close attention to anneguo@linkedin.Thank you!               E-mail:anneguo329@gmail.com  Skype:pkmachinery09

Introduction of Pipe Screw Conveyor

GX tubular screw conveyor is bulk material handling equipment, which usually consists of a tube containing either a spiral blade coiled around a shaft (sometimes called an auger), driven at one end and held at the other. The main parts include tube, shaft with spiral blades, inlet and outlet chutes, as well as driving device.

The closed pipe-type screw conveyor is a pipe with a shaft inside with welded screw blades and passive bearing. The screw’s blades have different pitch which depends on the type of the transported raw material and the planned capacity. This type of conveyor is closed, which means that the screw cannot be accessed directly. Due to the closed structure, the transported raw material does not spill outside the machine during transport.

1. The machine can be equipped with a pull screw. In this version, the drive unit is located in the direction of the raw material feeding. Some screw conveyors are equipped with push screws with gear motor installed on the feeding side. The screw conveyor is fitted with an initial or end bearing. Depending on the type of transported raw material, slide or bearing rests are installed.     Horizontal screw conveyor has the advantages of sealed operation, simple structure. screw conveyor suitable for conveying powdery, granular and small bulk materials horizontally or aslope, such as coal, ash, slag, cement, food, etc. screw conveyor is an new transportation equipment.
2. The working principle is that screw conveyor consists of power device, gear box, coupling, screw axis and hanging bearing. The screw axis is made of several sections which connected with spline. Hence, the conveyor hold large load capacity and convenient to dismounting. It is open a besel on the casing to ensure a safe operation. The material moves along the spiral within the tube. The unique action of the flexible spiral conveyor eliminates the risk of the product separation that can take place in conventional pneumatic conveying systems where mixed materials have components of different densities and particle size.

Henan Pingyuan Mining Machinery Co., Ltd is the most professional manufacturer of Belt conveyor, and Vibrating screen, Bucket elevator, Screw conveyor, Scraper conveyor using the world's most advanced technology, we are willing to serve every company to meet your custom needs. Our goal is "be the future global leader of mining machinery industry". Have any questions, please contact us without any hesitation.

Website:www.pkmachinery.com                    
E-mail: info@pkmachinery.com
Tel: +86 373 579 9188
Fax: +86 373 507 1699
Address: 289 Yellow River Road, Xinxiang City, Henan Province, China

Blocking Fault Analysis of Screw Conveyor

Since screw conveyor conveying space is small and it is sensitive to material, intertwining phenomenon is easy to occur when screw shaft rotates, blockage occurs in the place of hanging bearing. So blocking problem is the most common fault of screw conveyor which will affect production and increase power consumption, even the motor will burn out and screw shaft twist off which will affect the normal production. Blocking problem is caused by many reasons, we can take measures to avoid this problems:

 1. Select reasonable screw conveyor technical parameters, for example, if using low speed screw conveyor the rotating speed can not be too fast.
2. Carry out the operation procedures strictly, non-load start-up and stop to ensure continuous evenly material feeding. 
3. Increase the outlet or extend the chute end dimension to solve the problem of unsmooth discharging or can not discharge material timely .At the same time, you can also install a section of reversed screw blade to avoid blocking. 
4. Clean up the material inside the screw conveyor in order to prevent big impurity or fibrous material enter into the screw conveyor and occurs blocking.

 5. Reduce the transverse dimensions of intermediate bearing as much as possible in order to reduce the possibility of material passing through the intermediate bearing.
6. Install a level sensor and blockage sensor which can achieve the purpose of automatic control and alarm. 



Henan Pingyuan Mining Machinery Co., Ltd is the most professional manufacturer of Belt conveyor, and Vibrating screen, Bucket elevator, Screw conveyor, Scraper conveyor using the world's most advanced technology, we are willing to serve every company to meet your custom needs. our goal is "be the future global leader of mining machinery industry". have any questions, please contact us without any hesitation.