Introduction of Motor IP Grade :The Meaning of First Number

Motor IP (INGRESS PROTECTION) grade system is drafted by IEC (INTERNATIONAL ELECTROTECHNICAL COMMISSION ).IP grade is composed of two numbers, the first number represents for anti-invasion grade of external objects and dust, the second the number shows that the sealing degree of anti- invasion of moisture and water, if the number is greater, the degree of protection will be higher.
0: no special protection
1: it can prevent external objects with solid diameter larger than 50 mm entering into the casing.
2: it can prevent external objects with solid diameter larger than12 mm entering into the casing.
3: it can prevent external objects with solid diameter larger than 2.5 mm entering into the casing.
4: it can prevent external objects with solid diameter larger than 1 mm entering into the casing.
5: protection against dust, it can prevent dust from entering to affect the normal operation of the product, and prevent dust contacting the inner casing or parts.
6: sealing against dust, it can completely prevent dust from entering into the casing and prevent the dust contacting the inner casing or parts.

Installation,Debugging and Operation for Tripper Conveyors

Tripper conveyor is a mobile device which can unload materials at the arbitrary point of horizontal section of the belt conveyor, it’s a single part of the belt conveyor. The installation, debugging and operation notes are as follows:
Installation
The installation and primary debugging of tripper conveyor are finished before leaving factory, the only thing needs to place the tripper conveyor on the guide rail, and the conveyor belt should be through the pulley, roller group of tripper conveyor and make sure the conveyor belt goes by the driving pulley of head section, the turnabout pulley of tail section of belt conveyor.

Debugging and operation
Upon the completion of the conveyor belt connection, tripper conveyor cable arrangement, you can debug according to the following steps:
Please check whether the reducer is lubricant, whether there are obstacles that the tripper conveyor may collide when it walks around before start-up .
Inching run the tripper conveyor the first time in order to see if the brake of tripper conveyor is adjusted well, it can not only avoid it collides with the potential barriers, but also can check the facilitating conditions of the guide rail and the walking wheel of tripper conveyor, as well as the operation situation of every part of tripper conveyor.
After confirming all above mentioned operations are normal, the tripper conveyor can be operated on the guide rail at any point, the purpose of the test is mainly observing the walking flexibility, reliability, walking wheel and the guide rail, please adjust it if necessary.
After the above mentioned is qualified, the tripper conveyor can be put into use.

Troubleshooting of Abnormal Noise during the Operation of Bucket Elevator

1. The base plate and chain bucket of bucket elevator collide with each other: adjust the take-up device of base in order to stretch the chain.
2. The driving shaft and driven shaft key is flabby, the sprocket is drift, chain bucket collides with casing: the position of sprocket needs to be adjusted and the key needs to be stretched.
3. The guide plate collides with chain bucket: readjust the position of guide plate.

 

4. There are some materials mingled in the guide plate and chain bucket: enlarge the inputs angle of material inside the base.
5. The failure bearing causes inflexible operation of bucket elevator: the bearing need to be replaced.
6. The pieces of materials or other objects stuck in the casing: stop the operation of bucket elevator and remove the materials. 
7. Gear profile of sprocket (driving and driven sprocket) is abnormal: correct the gear profile of sprocket or replaced driving sprocket. 
8. Gear profile of driving sprocket and chain is out of order: the sprocket gear profile needs to be corrected. 
9. Drive chain idling: adjust the length of chain.
10. The casing is not installed properly: the full length of vertical alignment of casing needs to be adjusted.

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