Do You Know What are the Main Technical Requirements of Conveyor Roller

1.Conveyor roller cylindrical radial circular runout
In order to guarantee the belt conveyor run smoothly, it is necessary to make strict specifications on roller radial circular runout, otherwise it will cause conveyor belt vibration, increase conveyor belt running resistance and consume more power due to its higher value. Therefore, this is an important technology index for roller.

 

2.Rotational resistance after installation of conveyor roller
Excessive roller rotational resistance will cause conveyor roller damage in advance and conveyor belt wears rapidly, it will also cause the increasing of the driving power, so this is another important technical index for roller.
3.Waterproof, dustproof, sealing performance of conveyor roller
The service life of roller depends on its sealing performance to a great extent, good seal performance can prevent dirt and moisture entering into roller bearing roller way effectively. In order to improve its service life, we must develop better way of waterproof, dustproof, sealing performance.

 

4.Roller axial carrying capacity
Generally, roller bears the roll force for only one direction, therefore, we must ensure normal operation under axial load of roller.
5. Service life of conveyor roller
This is a comprehensive index which involving the scientific rationality of structure design, the manufacturing quality of roller, bearing selection, the choice of grease and grease filling and sealing effect etc.

 

testing of screw conveyor for Singapore

testing of screw conveyor for Singapore

Trial Run of Linear Vibrating Screen

When finished the installation of linear vibrating screen, check the fastening situation of bolts, and the relative positions of inlet, outlet and upper ,lower processing equipment to ensure no crash.

(1)Confirm the electric wiring is well connected. http://www.pkmachinery.com/faq/trial-run-of-linear-vibrating-screen.html
 

(2)Trial run should go ahead about 8 hours, and check all parameters of screen in operation according to the technical requirements. Such as whether the amplitude is reach specified value, amplitudes on corresponding points of screen box are conform, and the deviation should not exceed 1-2mm, and the voice should be lower than 85dB. When trial run in 4 hours, temperature of bearing is rising, and keep balance. In general, temperature of bearing shouldn’t be higher than 40℃, if there is a highly rising of the temperature, stop the machine and find reason. After trial run 4 hours, stop the machine and check all tightening bolts. If the trial run is normal, and can confirm the installation of linear vibrating screen is qualified.

(3)Increasing the feeding volume gradually when the machine is came into use, and checking the screening effect. If it is good, increasing feeding volume continuously until reach the rated output. When the machine is produced well, the exciting force is not the biggest, if the amplitude reduces in trial run and the screening effect is not good, take the shields apart, which are in the two sides of motor, increase the contact ratio of two eccentric blocks to increase the power. Ensure the contact ratios of two eccentric blocks are totally conform.

In addition, PK machinery supplies belt conveyor, bucket elevator, vibrating screen etc. for several years. With abundant engineering design experience, professional technical ability and strict fabricating specification, PK machinery wins the highly praise from clients all over the world, any inquiry, please feel free to contact us!

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

Suggestions for design and manufacturing of multi-layer trommel screen

2015-05-22

   When screening material quantity is bigger and need high screening efficiency, it would be better to use multi-layer trommel screen. Multi-layer trommel screen generally adopts gear transmission method, the cylinder body is multi layers. There are coarse mesh,  middle fine screen and fine mesh from inside to the outside of screen cylinder. Screen cylinder has a 7-10 degrees angle, which is convenient to the movement of materials along the length direction of screen cylinder. This kind of trommel screen can be added spray device according to the requirements in practical work, and its mesh should be cleaned timely. 

 

 

   Multi-layer trommel screen's power source is three-phase asynchronous motor, and screening material through the rotation of reducer gear which causes the rotation of screen mesh. Multi-layer trommel screen can be supported by more than two groups tug according to the length of screen cylinder to make the machine operate smoothly.

 

 

The common industry using multi-layer trommel screen is sand production line. When screening capacity is bigger, use this kind of screening machine, there are low cost, less maintenance and easy to maintain. So the multi-layer trommel screen is widely used. 

Bucket Elevator Maintenance Notes

1.During operation, all doors must be fully closed; there must be appropriate lighting facility in the place of the lower and upper section inspection doors which open frequently ,if there is failure during operation, please stop the bucket elevator at once and eliminate the failure, if there are any defects are not suitable to eliminate immediately, the impact to the work is nor too much, please keep it in the maintenance record and eliminate the failure when troubleshooting, the supervisor should always check the working condition of each part, but when the machine is running ,all cleaning and repairing work is not allowed.
2.The bucket elevator should be started up without load, and stop the machine before all materials inside the buckets are all discharged. 
3.The tension device of lower bucket elevator section should be appropriately adjusted, keeping the belt with normal working tension, the supervisor should always observe the working situation of bucket and belt, damaged buckets should be removed.

4.The bucket elevator can not reverse, if reverses, the chain will run off track, and it is very troublesome to eliminate this problems.
5.Even feeding, increasing the feeding rate suddenly is not allowed .The feeding rate can not exceed the transmission capacity of bucket elevator, otherwise it will be easy to cause material accumulation at the bottom.
6.Add lubricating oil appropriately in time.
7.Replace the chain and bucket which are badly worn or damaged timely.
http://www.pkmachinery.com/faq/bucket-elevator-maintenance-notes.html