How to Identify Counterfeit and Genuine Bearings of Vibration Motor

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.

Gyratory Screen used for Tea was Delivered to India

On September 11th, 2015, one set gyratory screen ordered by our Indian customer was delivered from Qingdao Port. This kind of machine is used to screen tea and its capacity is 100-150kg/h. According to our customer’s requirements, the engineer selected model 5PXZS1236 to meet the needs.

 

Gyratory screen has 5 layers and the size of screen of every layer is 8 mesh, 10 mesh, 12 mesh, 16 mesh, 20 mesh respectively. So this type can meet customer’s demand well. Actually, this business can realize our mutual benefit.

 

In addition, PK Machinery has abundant experience in doing business with foreign customers and exportingvibrating screen, belt conveyor, bucket elevator, scraper conveyor and screw conveyor for many years. We anticipate your enquiry sincerely.

Bucket Elevator Holdback Problems during Operation

While using bucket elevator, sometimes there is abnormal holdback operation phenomenon during operation, do you know the reason?
In fact, during the operation of bucket elevator, sometimes there will be operation stopping inevitably due to malfunction or heavy-loading, even the breakage of link chain or belt could occur, then cause reversal. The reverse operating can cause collision of the bucket and material that remain in the bottom, this could easily cause deformation of bucket and will not function well due to severe damage. Overloading situation is easy to occur if not pay attention to feeding capacity.
Under normal circumstances, the bucket of bucket elevator will lift the material from the bottom to the discharge port which is located on top of bucket elevator and then throw out. In order to ensure the production, when designing and manufacturing equipment, manufacturers just consider that the equipment will not reverse under the non-load condition, because bucket of lower part is two more than upper part, which will be much heavier than the upper. In order to prevent the breakage of belt or link chain or reversal occur in the bucket and link chain, especially when the bucket elevator is under the overload condition, the backstop should be installed at the external of bucket elevator in order to avoid the problem of overload.

 

The bucket elevator holdback consists of reverse rod, revolving shaft, retracting spring and dowel pin etc. In the process of normal operation of bucket elevator, the reverse rod will be upswing after hit by the sleeve, it will fall under the action of retracting spring force, then upswing after hit by another sleeve, not affecting the normal operation of equipment. If there is reversal of bucket elevator, the dowel pin will halt the reverse rod, so it will no longer swing down, and the sleeve will also be blocked by the reverse rod, hence the whole link chain could not reverse. If there is too much material spilled inside the body of machine and fall on the reverse rod, it will cause the failure of holdback. 

If there is too much materials outside the bucket elevator, it will affect the rotation axis of screw. We may see there will be stacked with material in the pit of bucket elevator on the user’s site, which will seriously affect the operation of the relevant parts of holdback.

Rotary Vibrating Screen

Description

►Customer reference list

CUSTOMER REFERENCE LIST (YEAR 2012-2014)
NO.	EQUIPMENT	VENDOR'S SCOPE OF SUPPLY	QUANTITY	TIME
		PROJECT LOCATION
11	Rotary Vibrating Screen	Namibia	6 Sets	20121000
18	Rotary Vibrating Screen	Britain	2 Sets	20130316
24	Rotary Vibrating Screen	Philippines	1 Set	20130624
32	Rotary Vibrating Screen	Russia	1 Set	20132014
34	Rotary Vibrating Screen	Iran	3 Sets	20140129
41	Rotary Vibrating Screen	Venezuela	1 Set	20140500
45	Rotary Vibrating Screen	Philippines	1 Set	20140817
46	Rotary Vibrating Screen	Britain	1 Set	20140926
51	Rotary Vibrating Screen	Cyprus	1 Set	20150112
52	Rotary Vibrating Screen	Australia	1 Set	20150220
57	Ultrasonic Vibrating Screen	Norway	1 Set	20150420

► Introduction and working principle：Rotary vibrating screen is designed as a high-precision screening machinery. Round vibrating sieve is composed of vertical motor,and eccentric weight installed at two ends.We can produce horizontal, vertical, inclined motions by adjusting the upper and lower eccentric weight.Diameter can be ranged from 400mm to 2000mm, with single or multiple screening decks.

► Working Principle：

XZ Rotary Vibrating Screen is a vertical-motor system, with eccentric hammers being installed on top and bottom of the machine, where the motor acts as the vibratory source. The direction of the eccentric hammers may change its rotational mode either in horizontal, vertical and inclined movement onto the sieving screener surface. The trajectories of the materials on the sieving machine can be change by adjusting the phase angle on both top and bottom parts.

 Running Track of Rotary Vibrating Screen

► Application :
    Powder rotary vibrating screen is widely used in many kind of industries
    Food industry: sugar, salt, alkali, glucose powder, monosodium glutamate, soy milk, yeast, wheat starch, wheat flour, rice flour, skimmed milk powder, fruit juice, dehydrated vegetables, thick, pineapple juice, soy sauce, corn starch.
    Chemical industry: pigment, medicine powder, oil, rubber, plastic, epoxy resin, PVC resin, polyethylene powder, vinyl chloride resin, aggregate grains,cosmetics.
    Ceramic industry: glass powder, refractory material, silica sand, spray soil particles, mud, grinding materials, nano brick materials, artificial graphite, kaolin, lime hydrate, mica, aluminum oxide, calcium carbonate Oxygen, diamond powder
    Metallurgy mining industry: lead oxide, zinc powder, aluminum powder, iron powder.
Pollution treatment: waste water, waste oil, pig dried urine, dyeing wastewater.
Other industries: carbon black, pearl powder, light calcium, additive, etc..

► Features
-Layers can be up to five layers
-Fully enclosed design,continuous operation,small volume and low noise
-Self-cleaning device(bouncing balls),avoiding blockage, mesh size can reach to 500 mesh ( 0.028 mm)
-High precision, high efficiency, powder, granule and mucus are applicable

► Advantage :

1. Low energy consumption, low noise, 
2. High screening accuracy, large capacity, simple structure. 
3. Fully enclosed structure, good sealing, prevent dust spillover, automatic discharge, more suitable for assembly line work. 
4. Screen body parts are used copper plate and section welded together (part group between body for bolt connection) overall stiffness is good, strong and reliable. 
5. Unique design of screen structure, convenient and quickly to change screen (only 3 to 5 minutes); And her mother screen fully supporting the fine screen, so fine screen can be long life, so as to reduce the consumables cost of the fine screen; In addition this design allows to using all kinds of screen (nylon, special dragon, PP network).  

► Selection condition :

To choose the most suitable machine for you ,please provide us more detail information as the followings:

1．Material: 

  -Material name:_____

  -Feeding size:_____mm

  -Material density:_____t/m3

  -Material distribution:_____%

  -Separation destination:_____

2．Screen machine

  -Capacity:_____t/h

  -Screen deck: _____ 

3．Particle size distribution of each layer:  

  -Opening size:_____mm

  -Construction material:_____

 

A lot customers only knows the micron term and don’t know the meaning of mesh when purchasing a rotary vibrating screen. In fact, the conversion of micron into mesh is simple. Let’s PK Machinery explain the specific conversion method. 

 

At first, let’s us briefly understand what is mesh definition. The mesh refers to the number of inches of screen holes per square. 50 holes per square inch refer to the 50 mesh. The bigger the number of mesh means the more holes per square inch. Besides, it also used to express the screen mesh particle size. The higher the number of mesh means the smaller the particle size. 

The powder particle size is known as particle size. The granularity means particles can pass through the screen mesh size with 1 inch (25.4 mm) the number of mesh width of the screen mesh representation is known as mesh. There is no unified standard size of powder technology in the world. Each enterprise has its granularity index definition and representation. Different country has different screen size. Hence, it is difficult to be standardized.

Fixed Belt Conveyor

Description

►Brief Introduction
Fixed Belt Conveyor is a friction drive conveyor transported materials continuously. Belt conveyor machine comprises the rack, conveyor belt, pulley, rollers, tensioning devices, driving unit and other components. It not only conveys material, but also can cooperate with various industrial equipments to form a rhythmic transport line.

►Features
1) Long distance
2) Easy maintenance
3) Steady operation
4) Convenient loading and unloading
5) Wide applications

►Advantage

The advantages of belt conveyor are 

   1.Large conveying capacity

   2.Long conveying distance

   3.Low horsepower compared with other types of conveyor

   4.Low cost of operating and maintenance

   5.Stable performance and reliable operation

   6.High universality and easy maintenance

   7.Labour saving

   8.No product degradation during conveying process

   9.Conveyor can have changes in elevation (horizontal, inclined or combination)

   10.Weight belt section can be added for continuous product weighing

   11.Belt conveyors can pivot at one end allowing the discharge to be moved over an arc (radial stacking).

►Working PrinciplesBelt conveyor is composed by two endpoint pulleys and a closed conveyor belt.  The pulley that drives conveyor belt rotating is called drive pulley or transmission drum; the other one–only used to change conveyor belt movement direction–is called bend pulley. Drive pulley is driven by the motor through reducer, and conveyor belt dragging relies on the friction drag between the drive pulley and the conveyor belt. The drive pulleys are generally installed at the discharge end in order to increase traction and be easy to drag. Material is fed on the feed-side and landed on the rotating conveyor belt, then rely on the conveyor belt friction to be delivered to discharge end.

►Application
Long distance belt conveyor can transport bulk materials or bagged goods, such as stone, sand, coal, concrete, cement, gravel, fertilizer, mineral ore, limestone, coke, sawdust, wood chip, bulk material, grain, corn flakes, carbon black, component/part, etc.

►Components of Belt Conveyor

Main components of a belt conveyor are:

   1.Belt is used for moving and supporting surface on which the conveyed material rides. It is the tractive element. The type of belt used need to depend on the nature of materials to be transported. 

   2.Idlers are the supports for the carrying and return stands of the belt.

   3.Drive that imparts power to one or more pulleys to move the belt and its loads.

   4.Structure is the support and maintains the alignments of the idlers and pulleys. Besides, it also supports the driving machinery. 

Other components included: 

   5.Loading chute or feeder chute that organizes the flow of material and directs it on the belt conveyor.

   6.Take-up device which is used to maintain the proper tension of the belt for effective power transmission.

   7.Belt cleaner that keeps the belt free from materials sticking to the belt.

   Tramp removal device, which is optionally used in case the conveyed material bears the chance of having tramp iron mixed with it and subsequent handling of the material, demands its removal. 

   8.Continuous weighing device for constantly measuring the load being carried by the conveyor belt.

   9.Discharge chutes to guide the discharged projectile to subsequent conveyor or other receiving point.

   10.Surge hopper and feeder, which is essential for supplying material to the conveyor at uniform rate when the supply of material is intermittent.

 

   11.Tripper arrangement to discharge material at different point or to other device.


 

►Selection condition

1. What is the conveying material and its physical characteristics? such as bulk density, feeding size, temperature, mositure content etc.

2. What is the processing capacity of the belt conveyor?

3. What is the conveying length of the belt conveyor?

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 pulleydiameter 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.

Horizontal scraper chain conveyor

Description

►Customer reference list

CUSTOMER REFERENCE LIST (YEAR 2012-2014)
NO.	EQUIPMENT	VENDOR'S SCOPE OF SUPPLY	QUANTITY	TIME
		PROJECT LOCATION
8	Scraper Conveyor	Ukraine	1 Set	20120829
16	Scraper Conveyor	Russia	4 Sets	20121119
23	Scraper Conveyor	Russia	12 Sets	20130516
55	Scraper Conveyor	Pakistan	2 Sets	20150220

► Brief Introduction:
Horizontal scraper chain conveyor is bulk material conveying equipment, which consists of head section with driving device, connect section, tail section, tension device, as well as scraper and chains.By means of moving chains, it can continuously transport the materials in closed rectangular casing horizontally or at a slight incline.
MS buried scraper conveyor is widely used in cement plant, coal, metallurgy, mining, light, construction, chemical, grain, power industries etc.

► Working principle :
When scraper chain conveyor transports horizontally, the pressure which comes from chains in conveying direction to the materials, and the action which comes from the materials themselves cause internal friction. This friction ensures the stable situation between material layers, and it can overcome external frictional resistance which caused by moving materials in the trough and make materials transport as a whole fluid.

► Features:
1.Totally enclosed structure, light weight, small volume;
2.Convenient installation and maintenance;
3.Horizontal or slightly inclined transport from 0° to 30°
4.Multiple material feeding point and discharging point;
5.Conveying distance is up to 80m with material temperature lower than 120℃
6.Widely used in cement plant, coal, metallurgy, mining, light, construction, chemical, grain, power industries etc.

► Advantages :

    1.Totally enclosed structure, light weight, small volume

    2.Convenient installation and maintenance

    3.Horizontal or slightly inclined transport from 0˚ to 30˚

    4.Multiple material feeding point and discharging point

    5.Conveying distance is up to 80m with material temperature lower than 120˚C

► Applications :

MS buried scraper conveyor is widely used in cement plant, coal, metallurgy, mining, light, construction, chemical, grain, power industries etc.

► Selection condition :

    1. Material need to be processed_____?

    2. Feeding size____mm, bulk density____t/m3, material temperature_____degree ?

    3. Processing capacity____t/h ?

    4. Conveying length(distance between inlet and outlet)_____m?

    5. Inclination angle of conveyor______degree?