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.

Maintenance Tips of Conveyor Belt

Maintenance Tips of Conveyor Belt

In the use and storage of conveyor belt, it should kept clean, avoid direct sunlight or exposed to rain and snow, prevent contact with acid, alkaline, oil, organic solvent and other substances, and also located at least one meter away from heating device. The temperature of the storage should maintained at between 18-40 ℃ , the relative humidity should maintained between 50-80℃.In the storage period, conveyor belt should be placed in rolls, but not folding; in the placement, it should turn-over once in every seasons. Different types and standards layers number of conveyor belt should not be connected together while used, the best connection is used the bonded process. Type, structure, standard, number of layers for conveyor belt should be used according to the reasonable choice.

Conveyor belt operating speed generally not more than 2.5 m/s. For large lump size, material with large abrasiveness and fixed unloading device should use low velocity. The relationship between driving pulley diameter and coating layer of conveyor belt, supporting of driving and bend pulley and also requirement for trough angle of idler roller should according to the design specification of conveyor belt, reasonable selection. Direction of feeding should along the operating direction of the conveyor belt, use chute in order to minimize the impact of material fall on receiving belt, reduce material’s free fall distance. The feeding section of conveyor belt should shortened the spacing of idler and use absorber idler as discharge section. The belt should use striker plate with moderately soft, to avoid the rigid striker plate will scrape the belt surface of conveyor belt.

Eight Factors will Affects the Quality of Conveyor Roller

 Conveyor roller is widely used in various types of industries, however, most customers lack of the knowledge for choosing the suitable conveyor roller. Let’s show you what are the factors that affecting the quality of roller.

1. Roller radial runout (the index directly affects the stability of the conveying materials)
2. Flexibility (the index affects the life-span of the roller and belt, as well as the driving power of the machine)
3. Dust resistance performance(the index affects the life-span of roller)
4. Shock resistance performance (the index affects the life-span of roller)
5. Rotational resistance (the index affects the life-span of tape)
6. Axial carrying capacity (the index affects the life-span of roller)
7. Water resistance performance(the index affects the life-span of roller)
8. Axial string momentum (the index affects the life-span of roller directly)

Five Maintenance Tips for Belt Conveyor Roller

Belt conveyor roller is an important part for belt conveyor. It accounts for 35% of a belt conveyor total cost and bears more than 70% of the resistance. So the maintenance of conveyor roller is particularly important. Today PK Machinery will share some maintenance tips with you:

1. Generally speaking, the roller normal service life is more than 20000 h and it doesn’t need maintain. But according to application place and load capacity, we should formulate a maintenance date correspondingly, as well as cleaning, adding grease and maintenance etc. For the rollers which with abnormal sound or rollers don’t rotate, please to replace timely.
2. When replace the bearing, keep the bearing opening outward, spare proper clearance when put the bearings into the roller.
3. The labyrinth seals should adopt original accessories, put the seals into the roller respectively when assembly.

4. During operation, the rollers should be protected from heavy items hitting the tube.
5. In order to ensure the roller sealing performance and using performance, free disassembly roller is prohibited.