Introduction of Motor IP Grade :The Meaning of First Number

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.

Common Troubleshooting Methods of Vibration Motor

Common Troubleshooting Methods of Vibration Motor

1. after connect the power supply, motor is unable to start, please check:
(1) if power supply is lack of phase;
(2) if motor is loss of phase;
(3) if protective cover is damaged or rub eccentric block.

2. after start-up, there is big motor noise or motor heats, please check:
(1) if the contact surface roughness of vibration machine and motor foundation is in line with the installation requirements;
(2)if the anchor bolts are not tighten up ;
(3) if the vibration acceleration is in line with the requirements;

3. after the adjustment of eccentric block, amplitude changes abnormally please check:
If eccentric block on both ends of the rotor axis is symmetrical.

4. when two vibrating motors of vibration machine vibrate at the same time, if its phase does not conform to the requirements, please adjust the phase sequence of the single unit, don't adjust the total phase sequence of two vibrating motors.

How to Identify Counterfeit and Genuine Bearings of Vibration Motor

How to Identify Counterfeit and Genuine Bearings of Vibration Motor

As the power source of mining machine, it is very important to identify counterfeit and genuine bearings of vibration motor. Otherwise it will affect the normal operation of mining machinery. So it needs us to pay attention.

Due to the special structure principle of vibration motor, the quality and lifespan of vibration motor directly affected by bearings, of course will be embodied in the price level of vibration motor. So it is really necessary to choose a good bearing manufacturer, the following methods will help us identify counterfeit bearings:

1. Packaging

Formal original packing of genuine bearing is comparatively normative which includes inner and outer packaging with unified standard and clear writing. However, the counterfeit bearing packaging material is inferior, printing is rough.

2. Color

Specific parts of genuine bearing present a certain color, for example: chamfer is black, if there is any other colors, it may be counterfeit bearings.

 

3. Appearance 

The writing letters of genuine bearing outer packing adopt special carving or spraying technology design, however, the counterfeit bearing printing is blurry.

4. Material 

Material selection of the genuine bearing is standard steel material, however counterfeit bearing adopts cheap ,fake inferior and unqualified material in order to reduce the manufacturing cost, the weight is light.

5. Processing technology

Genuine bearing manufacturing process is fine which can rotate smoothly However counterfeit bearing manufacturing process is poor with coarse surface ,it can not rotate smoothly.

Maintenance Tips of Conveyor Belt

Maintenance Tips of Conveyor Belt

Conveyor belt is the most important part in the belt conveyor. It carries almost all of weight of materials. So it is better to keep the belt in a good condition and maintain it in daily life.

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.

Useful tips of selective purchasing and storing conveyor belt

Useful tips of selective purchasing and storing conveyor belt

How much dou you know about the selection and storage of conveyor belt? Here PK Machinery will analysis some useful tips for you. Hope it can help you.

Selective purchasing

1.Describe the name and characteristics of specific materials accurately, specially the particle size, temperature and if acid ,alkali resistance or special requirement. For instance, illustrate the temperature used for the heat resistance conveyor belt.

2.Describe the specific application areas, requirement specification (width, length, number of piles, thickness, etc.), especially the temperature used and convey capacity of heat resistance conveyor belt.

Storing

1.In the process of conveyor belt transport and storage , it should keep clean and keep it from direct sunlight ,rain and snow, prevent it from contacting with acid, alkaline, oil, organic solvent and other substances, and also locate it at least one meter away from heating device. 

2.The temperature of the storage should be maintained between 18-40 ℃ , the relative humidity should be maintained between 50-80℃.

3. In the period of storage, conveyor belt should be placed in rolls instead of folding and it should be turned over once every season.

 

Installation,Debugging and Operation for Tripper Conveyors

Installation,Debugging and Operation for Tripper Conveyors

Belt conveyor tripper is a mobile device which can unload materials freely. Here PK Machinery will introduce you something about its installation, debugging and operation.

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.

The Role of Conveyor Belt Cleaning Device

The Role of Conveyor Belt Cleaning Device

What the cleaning device plays role in belt conveyor is that to help sweep the sticky materials.If not remove those sticky materials, they will affect the efficiency of belt conveyor and damage the return rollers.

The belt conveyor is often used to transport viscous materials, such as coal dust, mud, powder materials and etc.. Some of them will stick on the working surface of belt conveyor, which cannot be removed when discharged the materials. At this time, the adhesive material will then enter the return idler, the roller become dirty as attachment stick on it. Materials enter the roller casing, thereby increasing the radial and thrust load of bearing block, causing rapid wear of bearing. The materials deposit on the roller casing will tear the rubber surface of the belt conveyor, accelerate the wear out failure of belt conveyor. If sticky materials enter the tail bend pulley, it will stick on the surface of roller. The more the viscous materials stick on it, the greater the force of the sticky materials, which will result belt deviation and increase belt wear, leading to serious consequences.

The remaining material on the belt conveyor will increase the friction force on roller, sometimes it may cause the tear on the rubber surface of belt conveyor and also the layer of roller encapsulate. If the cleaning device can function well, it can prolong the service life of the roller, belt conveyor and etc.. This shows that the cleaning device has a significant effect on belt conveyor. In the process of operation, if you want to clean the sticky material on the tail bend pulley through anthropogenic removal, it often prone to serious bodily injury or death. Hence, in order to ensure the normal operation of the belt conveyor, the sticky material must be cleaned up by cleaning device before materials enter into the snub pulley.

 

8 Factors will Affects the Quality of Conveyor Roller

8 Factors will Affects the Quality of Conveyor Roller

Actually, conveyor roller has a great significance for belt conveyor. It is important for customers to choose suitable conveyor rollers. Here, PK Machinery will analysis 8 factors that can affect the quality of conveyor rollers.

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

Five Maintenance Tips for Belt Conveyor Roller

Belt conveyor rollers play an important role in transporting materials for belt conveyor. So know how to maintain rolllers is much important. Today we will introduce you some useful tips.

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.