Never Do like this, or Screw Conveyor will be Scrap Iron

Never Do like this, or Screw Conveyor will be Scrap Iron

Are you still complaining about your screw conveyor? So do you still think you buy a inferior machine? After having read this article, I believe you will change your mind. Based on our survey, we have found that many users adopt wrong operation method, it will not only damage screw conveyor, but also harm person safety of operators. Therefore we hope you can adopt right operation way.

Wrong operations are as follows:

1.Open the upper cover during operation

It’s forbidden that open upper cover during operation even if in order to observe the running conditions. If there are foreign bodies falling into screw conveyor, it will damage the screw blade, shaft and casing.

2.Doesn’t clean the rested material after having used screw conveyor

If the rested materials has property of stickness and corrosion, they will corrode screw blade and shaft as well as shorten conveyor lifespan.

3.Much overload on motor

This kind of situation will cause motor has high temperature even damage motor. Thus please strictly control feeding quantity.

4.Seldom add lubricating oil into bearing

Dust will make lubricating oil thickness so that can influence the rotation of shaft. Please add lubrication oil timely.

5.Force to stop screw shaft rotating after turning off machine

It’s very dangerous to do like this, otherwise it will make a great damage on screw shaft and motor. Therefore, we should make the machine stop naturally.

More information, please visit http://www.pkengineeringsol.com/

Why does Screw Conveyor Occur Material Backflow

Why does Screw Conveyor Occur Material Backflow

As we all know, screw conveyor has widely application in various industries, such as building materials, chemicals, power, metallurgy, coal carbon, food and other industries, and could be suitable for horizontal or inclined conveying. During operation of screw conveyor, once there are materials blocked in hanging bearing, which is called material backflow. If screw conveyor always occurs the phenomenon of backflow, then it will cause screw conveyor throughput greatly decrease. With regard to large capacity screw conveyor, the material backed flow is likely to undermine reducer, and result in reducer overburn as well as economic losses.

If it is seen from transportation process of screw conveyor, the speed of controller and slipping material determines the speed of material which is conveyed from screw conveyor. What’s more, conveyor filling coefficient determines the discharge time, and the speed is large or small depends on the size of screw arbor and motor. Therefore raise these two components size can successfully address the material backflow problem.

U Type and Pipe Screw Conveyor Introduction Combining with Actual Cases

U Type and Pipe Screw Conveyor Introduction Combining with Actual Cases

Have you ever encountered such a problem that you don’t know U type screw conveyor or Tube type screw conveyor is more suitable in your production line? Here PK Machinery will give you some suggestion as follows:

U type screw conveyor

The casing is designed to U type with a top cover which can be dismounted. It can be closed type or open type according to the working condition. For example: The following engineering drawing is a limestone production line of our Philippine client which consist of U type screw conveyor, bucket elevator and vibrating screen etc. U type screw conveyor is installed under the vibrating screen machine, which will transport different particle size material to the downstream machine. Here we suggest U type screw conveyor, the reasons are 1) Separately horizontally transport and transporting with 10 degree angle; 2) The limestone material is very abrasive, the top cover is easy to disassemble to change the screw blade and other wear parts, convenient to maintain; 3) Top cover has a better sealing, and it is easy to connect the dust collector etc.

Inclined pipe screw conveyor

The structure is pipe type with special gearbox, the rotate speed is faster than common conveyor. Then can achieve angle more than 60 degree. For instance: The following on-site screw conveyor picture is our Russian customer (AKER SOLUTIONS)’s projects. The “Aker solutions” purchased 18 sets LSY model screw conveyor for a cement production line which are installed under the cement silo. Here we propose Tube type screw conveyor, because: 1) It need to transport with 50 degree; 2) The material is easy to transport, almost no maintenance, running steady; 3) It has a good sealing performance, no dust pollution; 4) There are universal joint at the inlet and outlet, and easy to connect with others equipment.

Briefly Introduce Cement Screw Conveyor Spare Parts

Briefly Introduce Cement Screw Conveyor Spare Parts

Cement screw conveyor spare parts mainly include spiral blade, reducer, intermediate bearings, tailstock, flanges, universal joints,etc.

Spiral blade surface with continuous cold rolled will generate cold hardening, its hardness and wear resistance have improved greatly. Due to smooth surface structure and low resistance, it can improve transporting efficiency.

 

Making use of the spherical and other devices, universal joint can achieve shaft power output at different directions. According to whether there is obvious elasticity on the reverse direction, universal joint can be divided into rigid and flexible universal joint.

Specialized reducer has new hardened tooth surface, high precision, small size, light weight, strong bearing capacity, high transfer efficiency, easy installation and other advantages.

Intermediate bearings mainly bear the weight of the shaft, the radial load deformation and radial load. Intermediate bearing is divided into sliding bearing and rolling bearing according to its basic structure and form of friction.

Installation Requirements of Screw Conveyor

Installation Requirements of Screw Conveyor

1. The foundation of screw conveyor should be completed 20 days early before installing screw conveyor so that it can make foundation solid and reliable and keep the spiral machine from subsidence or deformation, to ensure there is sufficient stability when screw machine is running. 

2. The casing assembly shall meet the following requirements: 

(1)Longitudinal straightness tolerance accounts for 1/1000 length, full-length straightness tolerance is 3mm. 

(2)Lateral straightness tolerance accounts for 1/5000 width. 

(3)The gap on both sides of the inner wall of casing and screw shaft should be equal, its tolerance is 2mm, the bottom of the gap tolerance also is 2mm. 

(4)The casing joints should be tight fitting. 

(5)The casing and frame should contact well. 

3. The tolerance between shaft and bearing center line registration is 0.5mm. 

4. The inner surface of the two adjacent casing, their mutual joints may not have obviously shifted. 

5. The foundation bolts should be tightened after screw machine sections have adjusted well. 

6. The low-speed shaft of driving device and forward shaft of screw machine should be in a unified axis. 

7. It should be welded inlet and outlet after the whole machine is installed well if they require site installation.

The key points for screw conveyor selection

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.

Why Is Screw Conveyor Blade Damaged

Why Is Screw Conveyor Blade Damaged

During application of screw conveyor, it’s hard to avoid damaging screw blade. But do you have a better understanding about the reasons of screw conveyor blade damage? Today we will discuss it.

The most easily worn parts are hanging bearing, head or tail of screw conveyor, screw blade. Apart from temperature, environment and material, structure and human factors can also cause the screw blade. Then we will analyze the reasons why screw blade damages.

When the screw conveyor occurs blocking phenomenon in the outlet, it will cause screw blade damage. At this time, users can make the machine in a lower speed running. Sometime, when this machine conveys life garbage or organic plant, it also will lead to damage of screw blade.

In addition, the edge of screw blade is easier to be worn. Generally, if screw blade is far away from the axis of rotation, it will suffer the larger force and generate more cracks.