Necessity of Installing Hopper on Conveying and Screening Equipment

Necessity of Installing Hopper on Conveying and Screening Equipment

Are you worried about the bearing capacity of your equipment? Today, PK Machinery will give you some useful advice.

Whether users adopt vibrating screen or belt conveyor, once those equipmrnt work with other facilities, it’s very important to choose proper equipment to joint them. Generally, it’s better to choose hopper as connection device, because it can not only reserve material, but also reduce the impact force to screen mesh when feeding material so that can prolong the lifespan of device. 

For instance, one of our customer ordered inclined screw conveyor, due to its small capacity and it is needed to feed material directly, so our engineers suggest that it’s better to lay out one set hopper on screw conveyor. In this way can it not only reserve material to make screw conveyor work continuously, but also increase the working efficiency.

With the purpose of improving the production efficiency, it’s necessary to install hopper above the conveyor equipment or vibrating screen. Thus, it can reduce the cost of production line and save costs.

hopper

Distinguish Ultrasonic Vibration Sieve From Ordinary Rotary Vibrating Screen

Distinguish Ultrasonic Vibration Sieve From Ordinary Rotary Vibrating Screen

Ultrasonic vibration sieve is equipped with a ultrasonic generator that can prevent blockage. Specially, it is suitable for screening light specific gravity materials or fine powder. Generally, ultrasonic screening system consists of oscillator, ultrasonic resonant power supply and resonance ring. The high-frequency vibration which is generated by ultrasonic resonant power supply will change into high-frequency longitudinal oscillation wave through oscillator. This vibration will be spread to resonance ring to make it sympathetic vibration, and then this kind of vibration will be transmitted to the screen mesh evenly through the resonance ring.

Ultrasonic vibrating screen can separate all kinds of powder, enen though the powder is hard screened. In general, ordinary rotary vibrating screen cannot do this. Ultra-fine powder will be effected by large ultrasonic acceleration through mechanical wave which is attached on screen mesh. Generally speaking, compared with ordinary rotary vibrating screen, the passing rate generated by ultrasonic vibrating screen will be increased by 50%-400%. Mainly performances are as follows:

1. Reduce time of cleaning mesh.
2. Doesn’t pollute to powder which is generated by bouncing ball and other auxiliary materials.
3. Reduce screening frequency, keep high precision screening.

Remember Cleaning Ways of Stainless Steel Vibrating Sieve

When You See Ways to Clean Stainless Steel Vibrating Sieve

After long time using, stainless steel vibration sieve will become matt. So know how to clean it efficiently can prolong its lifespan. This article will tell you how to do, and hope you can have a better understanding.

When users put the stainless steel vibration sieve into use, especially screening easy corrosion materials, it will make a passivation film on the surface of machine. Because of pitting corrosion reactions caused by self excitation response, it will generate small holes on the surface of vibrating screen where the passivation film corrosion resistance ability is weak. Meanwhile, along with the approach of chloridion, it will form strong corrosive solution, which will accelerate the corrosion reaction rate. This kind of situation will have a destructive effect on the surface of the stainless steel vibrating sieve.

Thus, there is no doubt that users should clean and maintain stainless steel surface timely if the machine under the situation of corrosive environment so that can extend its service life. What's more, users had better focus on avoiding scratch the surface during cleaning and using liquid bleaching composition or abrasives, steel wool and abrasive stuff. It is better to clean the machine with water again after finishing scrubbing so that washing liquid can be washed off.

More information, please visit www.pkmachinery.com

Brief Introduction of Circular Vibrating Screen

Brief Introduction of Circular Vibrating Screen

► Introduction 
Circular Vibrating Screen is a kind of new and highly effective vibrating screen that does circular vibrations and has multiple layers. Circular vibrating screen adopts cylinder postures eccentric block to produce strong exciting force. Its main body is connected by high strength screw bolts. A circular, elliptical vibration motion is created in order to sieve the materials efficiently. It is composed of screen box, screen mesh cloth, suspension (or support) device, underframe and motor.

► Working principleCircular vibrating screen separator uses eccentric block(YK type)/eccentric shaft(YA type) to produce strong exciting force, due to the unbalanced centrifugal force of inertia of the weights on the exciter, screen box vibrates, it can obtain different amplitudes by changing the exciter eccentric weight.

► Application
Ore circular vibrating screen is available for smelting , quarry , coal preparation, ore dressing, energy, power, chemical industry,construction material.

► Features
   1.Simple structure, easy maintenance, high production efficiency
   2.Using large clearance bearings and lubricated with thin oil, little noise and long service life
   3.Sieve beam and screen box adopts high strength bolt connection, no welding processing
   4.Small amplitude, high frequency, large dip angle structure to enable high screening efficiency and great handling capacity.
► Advantage

 A.Common features and performance of our Circular Vibrating Screen

1.High screening efficiency         

2.Strong vibration force created        

3.Adoption of punching sieve or steel made screening mesh in order to prevent blockage.        

4.Screen body connected by using high strength screw bolts.        

5.Adopts spring steel woven mesh or perforated sieve-plate, which is helps to prolong the service life and prevent blockage.        

6.Rubber vibration spring is used to reduce noise pollution and provide smooth vibration operation.     

B.Drive and Mounting of Circular Vibrating Screen

Drive is by electric motor and cardan shaft to the main drive shaft equipped with a single unbalance weight where required additional v-belt can be provided. The drive shaft is mounted on heavy duty roller bearing sets, lubricated with grease or oil. Like the linear vibratory screens, circular vibrating screens are mounted on reinforced rubber springs to prove the same benefits in performance and longer lifespan.

Introduce Circular Vibrating Screen

Introduce Circular Vibrating Screen

► Introduction 
Circular Vibrating Screen is a kind of new and highly effective vibrating screen that does circular vibrations and has multiple layers. Circular vibrating screen adopts cylinder postures eccentric block to produce strong exciting force. Its main body is connected by high strength screw bolts. A circular, elliptical vibration motion is created in order to sieve the materials efficiently. It is composed of screen box, screen mesh cloth, suspension (or support) device, underframe and motor.

► Working principleCircular vibrating screen separator uses eccentric block(YK type)/eccentric shaft(YA type) to produce strong exciting force, due to the unbalanced centrifugal force of inertia of the weights on the exciter, screen box vibrates, it can obtain different amplitudes by changing the exciter eccentric weight.

► Application
Ore circular vibrating screen is available for smelting , quarry , coal preparation, ore dressing, energy, power, chemical industry,construction material.

► Features
   1.Simple structure, easy maintenance, high production efficiency
   2.Using large clearance bearings and lubricated with thin oil, little noise and long service life
   3.Sieve beam and screen box adopts high strength bolt connection, no welding processing
   4.Small amplitude, high frequency, large dip angle structure to enable high screening efficiency and great handling capacity.

► Advantage

    A.Common features and performance of our Circular Vibrating Screen

    1.High screening efficiency 

    2.Strong vibration force created

    3.Adoption of punching sieve or steel made screening mesh in order to prevent blockage.

    4.Screen body connected by using high strength screw bolts.

    5.Adopts spring steel woven mesh or perforated sieve-plate, which is helps to prolong the service life and prevent blockage.

    6.Rubber vibration spring is used to reduce noise pollution and provide smooth vibration operation. 

 

    B.Drive and Mounting of Circular Vibrating Screen

Drive is by electric motor and cardan shaft to the main drive shaft equipped with a single unbalance weight where required additional v-belt can be provided. The drive shaft is mounted on heavy duty roller bearing sets, lubricated with grease or oil. Like the linear vibratory screens, circular vibrating screens are mounted on reinforced rubber springs to prove the same benefits in performance and longer lifespan.

Lubrication of Rigid Impeller Feeder

Lubrication of Rigid Impeller Feeder

When putting rigid impeller feeder in tio use, it's important to add enough 00# lithium lubricating grease to it so that this machine can operate normally.Here we mainly introduce you that different parts should be added different lubrication.

Add sufficient 00# lithium lubricating grease to reducer of rigid impeller feeder,within 6-10 months of being put into use, the transmission and bearing parts of rotary valve should be replaced and the grease also need to be changed. If rotary valve works in a high ambient temperature, humid or too much air return, please shorten the time of changing the new grease.

During operation, please check the lubrication parts every month.

Above mentioned lubrication time is just the minimum requirements, detailed time should be flexible and depends on the operation condition.

 

List of Lubrication parts
 

No.	Name of Lubrication part	Lubrication material	Lubrication part cycle	Lubrication method
1	Coupling	2# lubricating grease	1000 hours	Lubricator
2	Bearing seat	3# calcium base grease	1 month	Lubricator
3	Gearmotor	00# lithium lubricating grease	6 months	Lubricator

Brief Introduction of Gyratory Screen

Brief Introduction of Gyratory Screen

►Introduction
Gyratory Screen is a new developed equipment particularly for urea .The main function is to provide accurate separation of materials without product deterioration, thereby resulting greater product yields at higher production rates. This machine consists of top cover, top screen fame, spacer, bottom screen fame, the base space and the screen box. The unique gyratory motion of the near horizontal screen surface and the available screen mesh cleaning system secure the gyratory vibrating screen quality as a high capacity product that efficiently developed for materials screening purposes.

 

► Application

As one of new type and high standard screening equipment, gyratory screen can be used to screen raw materials and bean curd in large scale grease factory, and classify large granular urea, powder materials or granulated feed in feed mill. Also, it can be used for preliminary cleaning of raw material in feed mill as well as classifying intermediate products after regrinding in middle-sized feed mill. What's more, gyratory screen can be widely used to screen and classify materials or finished products for grain, sodium bicarbonate, large granular urea, urea granules, ceramsite, zirconia, reduced iron powder, barite, spice, plastic, mining industry, rubber, wood industry, plywood, medicine, sugar, mining, papermaking, chemical, refractory materials, building materials, activated carbon, food, PVC powder and other fine materials etc..With the development of market circulation economy, it is increasing to be used in waste plastic industry to classify, and also can do size grading for materials with broken.

 

► Working principle
Gyratory screen adopts Rotex technology, we also call it Rotex screen, which obviously improves the distribution of the material, thus it will enhance the screening efficiency and the effective utilization of the screen surface, also reduce the powder content of the final material .This design is totally enclosed without dust pollution,it can not only improve the operation environment but also reduce the dynamic ratio and foundation load effectively.

 

Six factors influences screening efficiency of vibrating screen

Six factors influences screening efficiency of vibrating screen

Vibrating screen is one most important sieving equipment in mining, metallurgical, chemical and other industries In the actual operation, many factors may influence the screening efficiency, here PK Machinery will introduce as follows:

1. crackle occurs on the steel channel of motor bracket

In the process of running, the platform vibrates strongly which will directly cause a large secondary vibration in the process of running which will make steel channel of motor bracket crack.

 

2. weight deviation of vibrator eccentric

Vibrator eccentric is to make the vibrating screen vibrate, its weight directly affects the vibrating amplitude value, if there is eccentric weight deviation, the vibration force will be scattered at running time, which is directly reflected on the screen body, and the amplitudes inconformity of each part, it will cause vibration sieve connection parts or welding joint cracking.

 

3. severe wear and deformation of outlet lining plate.

From wear condition of outlet side plate, soil and ore residue mixed and harden, during start-up and running processing, the vibrating screen vibrates and tamps constantly, soil becomes hardening and causes the soil and side plate striking.

4. crackle occurs on side plate and reinforcing rib crack, and the length is different.

Soil stuck seriously inside the outlet side plate, when vibrating screen works, soil compaction, and there will be a huge impact contact generated between vibrating screen and screen base frame. At the same time, it also seriously affects the linear motion of vibrating screen.

 

5. damping spring failure.

After using for a long time, the spring will occur permanent deformation due to the rubber aging or long-term stress which lead to the spring failure and vibrating amplitude inconformity of each part, causing the vibrating screen connection parts or welding joint cracking.

6. misalignment of eccentric plumb line and natural plumb line.

When install an exciter, after connecting the universal shaft coupling and exciter well, there will be misalignment of eccentric plumb line and natural plumb line due to the influence of the driving shaft torque which leads to eccentric rotation out of sync, and the inconformity of amplitude of vibrating screen each part, causing the vibrating screen connection parts or welding joint cracking.

4 Advantages of Linear Vibrating Screen with an Inclined Angle

4 Advantages of Linear Vibrating Screen with an Inclined Angle

Linear vibrating screen is widely used in mining, coal, refractory, metallurgy, building materials and other industries etc. PK Machinery can customized according to the client’s requirement and site space, such as the inlet and outlet location, vibrator motor installation location and linear vibrating screen can be inclined.

1. The motor angle of inclined linear vibrating screen can be adjusted freely, you can also enlarge the vibration source to get a amplitude which can meet the requirement of material screening.

2. The linear vibrating screen with an inclined angle can increase the screening production and improve production efficiency.

3. According to different material properties, the material can be sieved quickly due to the inclined angle of linear vibrating screen, it also can reduce the damage and friction of the screen mesh which brought by material.

4. When the angle is 15 °more than parallel, material are input as obtuse angle, it will increase the service life of the screen mesh effectively.

How to Solve the Noise Problem of Linear Vibrating Screen

How to Solve the Noise Problem of Linear Vibrating Screen

1.before start-up of linear vibrating screen, we should first check whether the bolts of every part are fastened properly or not, the purpose of fastening bolt is to make the parts more consolidated and reduce the unnecessary extra vibration during operation.

2. add rubber sheet on screen side plate, inlet, outlet and hopper to effectively inhibit the high frequency vibration and reduce the radiated noise. But in the actual production process of rubber ,due to heat and pressure ,it will transform or damage. So please check and replace after using a certain period of time.

3. adopt small elastic modulus ,low impact noise polyurethane sieve plate or rubber sieve plate instead of the punching steel sieve plate , rubber spring instead of steel spring.

 

4. damping treatment between inside and outside of the bearing housing, bearing roller can be made out to hollow roller or add some damping materials in the interior of the hollow roller.

5. Adopt flexible wheel disk gears instead of steel gears, which using rubber elasticity of gear wheel disk to transfer the torque, absorbing the vibration caused by engaging-in and engaging-out of the gear.