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.
 

(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.

Belt Conveyors And Vibrating Screens Are Ready For Delivery

On 29th May, linear vibrating screens, rotary vibrating screens and belt conveyors ordered by our Thailand client are ready for delivery. The screens are used for drying sand screening line, the belt conveyors with length 5m,9m,11m are used for feeding materials to the screens.

 

We are sure client will be satisfied with our products and we do believe we can establish long-term business relationship and redound to our mutual benefit!

 

 

PK Machinery offer the widest range of belt conveyor, bucket elevator, screw conveyor, vibrating screen etc. applied to different industries .With rich design experience and professional service ,we are sure PK Machinery is the best choice !Welcome to contact us if you are interest in our products:

 

 

 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

Application and Features of Vibration Platform

Vibration platform is widely used in metallurgy, molding, food, chemical, construction and other industries, and making the granule and powder material from in bulk to massive and shaped, etc. in the production processing.

Features of vibration platform are as follows.

1, in the operation of vibration platform, we can adjust exciting force of vibration motor to realize ideal material form in the platform.

2, vibration source is vibration motor with low noise, small power consumption and easy to maintenance.

3, ZDP series vibration platform has simple structure and is reliable operation, light weight, small volume and easy to install. 

4, vibration platform has three modes of vibration. Up and down, screw and three dimensional vibration.

   a, simple structure, reliable operation, light weight, small volume and easy to install.

   b, high power and big platform. The maximum power is 7.5kw, exciting force is 80KN, and weight bearing of sand box is 8T. 

   c, adjustable height of platform, which is suitable for assembly line using.

   d, three dimensional vibration used in complex mold casting.

   e, infinitely variable speeds can achieve the best tight effect without hurting model in molding process.

   f, self-locking function to ensure pinpoint in production line. 

The selection methods of quantitative control of impeller feeder

 When impeller feeder has model selection, it should start from the following aspects:

1.Determine the output of impeller feeder; and then according to output, choose appropriate caliber of impeller feeder.

 

2.When determining the basic model of impeller feeder, we need to pay attention to whether the working environment of impeller feeder is "positive voltage" or "negative voltage". When there is wind presure, impeller feeder must select lock wind type (Usually there is a mechanical lock the wind which has machine finishing to impeller and valve body of impeller feeder. After finishing machining, gap becomes smaller. When it works, the material can fill the gap to achieve the purpose of air lock. What’s more, there is flexible air lock. According to different materials, we can choose wear-resisting canvas belt and stainless steel sheets fixed on the wheel rimand beyond the rim 5-10mm. In the process of rotation, it can depend on the deformation of stainless steel sheet or canvas belt to block gap between rim andvalve body to achieve the purpose of air lock).

 

3. Select the appropriate caliber of impeller feeder: In general, the caliber of impeller feeder is round or square in the both ends. But if non-standard customized, its one side can be round while the other is square. 

 

4.After determining the basic forms, we can make sure that whether it needs frequency control according to the specific feeding range. If needs, the drive motor  of impeller feeder can be chosen as  for variable frequency speed control, frequency control of motor speed can be chosen as variable-frequency and variable-speed motor.

 

5.The normal speed of impeller feeder is generally 24-43 rpm.When the feeding amount is very small, it can choose the double stage motor to reduce the speed and adjust the feeding.

 

Debugging of Screw Conveyor

All the hanging bearings of screw conveyor should be hanging on the connecting shaft reliably without stuck and bending of screw. When installation, adjusting the gaskets number of hanging bearing to make no gap in subdivision surface while a proper radial gap between bearings and connecting shaft.

 

Hanging bearing should be installed in the center of connecting shaft, the distance between end face and two screw pipes should be over 10mm when D≦400mm and over 20mm when D≧500mm.

 

To adjust the accumulative error between chassis and screw, there should be padding asbestos lining between the flange of the chassis when installation. Padding waterproof canvas between chassis and cover according to the requirements for sealing.

 

When the difference of center heights of driving gear reducer shaft at low speed and screw conveyor is too much, using the gaskets to adjust the height of driving unit.

 

When no-loading running, if there is oil leakage phenomenon, removing the bearing and adjusting the tightness of spring in sealing ring until no leakage.

 

When no-loading running, overheating of hanging bearing indicates the installation position of hanging bearing is improper which leads the locking of connecting shaft, there should be loosing the fasten bolt and adjusting the position of hanging bearing.
 

 

Introduction and Advancement of Gyratory Screen

Gyratory Screen is the introduction of foreign advanced technology developed by a new type of urea screening equipment. The machine has reasonable design, simple 

stable operation, fully enclosed structure, dust pollution, anti-cratering, sticking network and so on. 

   Especially for its hygroscopic, sticky, easy to block holes and sticky net urea, it is more apparent. As a result of the plane rotary movement principle, it effectively reduces the movement of equipment and basic dynamic load ratio. The device uses a rotary shaker plane up and down vibration, automatic cleaning equipment under the net, the more traditional line screen, the improved screen life, low noise, large screening area, the efficiency increased from 93 to 95 increased to 98.5 good promotion prospects. Gyratory Screen screening machine is a new screening equipment for screening large pieces of urea development, is also widely used in chemical, food refractories, building materials and other industries screening operations. 

Its advanced nature: 

a, no vertical vibration, screen long life (6-12 months); 

b, each screen has a screen cleaning device attempts to prevent. Screen not plugging holes, extend operating cycle. Screening machine in working condition for a

continuous cycle to clean the screen. 

c, due to the use of plane rotation principle, significantly improved the distribution of the material, thereby increasing the effective utilization of the screen surface, and ultimately improve screening efficiency and reduce the powder content in the finished material; 

d, fully enclosed structure no dust pollution, improve 

f, on the basis of dynamic load is small; salesman's job is not operating environment

 

Features and Maintenance of Portable Belt Conveyor

Features:

1.Portable belt conveyor can work in any applicable site , and avoid operating in rainy day.

2.Because of its good performance so that you can directly for loading and unloading car, material handling, etc.

3.Easy to operate, no need for manual duty and start work once boot.This machine is equipped with electric control box which contains a master switch and a lift the switch.

Maintenance:

1.Avoid operating in damp environment and rainy day as much as possible to protect machine body from rust damage.

2.Regular check to ensure smooth running direction, to avoid the unnecessary loss due to conveyor belt running deviation.

3.Regular check the fasteners of machine body to ensure the bolt tension equipment in good condition. Add lubricating oil in time to ensure that the bearing lubrication. Regular check roller and other replacement of damaged parts to ensure the normal use of belt conveyor.

 

The problem of vibration damping of vibration sieve

Damping vibration sieve, the key lies in the generator is fixed on the damping.

  Energy saving unit with built-in shock absorber is through with the seismic performance of the rubber shock absorber and steel chassis isolation, so unless the occasions with high requirements to be increased again in isolation device between the steel chassis and the foundation,  allow the steel frame and foundation for direct installation

    For a fixed set of non energy saving built-in shock absorbers must isolation device is additionally arranged between the steel frame and foundation for shock absorber.

     Vibration and noise of shock absorber installation can reduce the ground based, there are several different shock absorbers, The spring shock absorber damping effect is best, the isolation efficiency is up to 98%; glass fiber absorber efficiency is 75% ~ 85%;   Rubber shock absorber is 50% ~ 80%. For the geological and environmental special shockproof requirements, The foundation shall be arranged around the width of 25 ~ 30mm is arranged at the bottom of the isolation trench, base isolation layer, then the foundation bottom ramming, withcement,cinder,asphalt paving thickness of about 200mm, and then concrete is poured on the isolation layer.

  Generator shall anchor bolts with M18 diameter steel frame is fixed to the ground, to prevent movement.

    In addition, generating around the unit must set aside sufficient maintenance space, at the end of the outer periphery of cooling water tank, require the distance with the room wall of not less than 1.5m, the height from the top of the unit room roof height distance shall be not less than 1.5m,usually require a real high low voltage 4.5m, this is the minimum distance that must hold for ventilation and heat dissipation and maintenance unit lifting machine. The base station from the ground at least 150mm.

Vibrating Feeder

Introduction:

Vibrating Feeder is a kind of feeding equipment that can bring bulk, granular and powdery materials from the warehouse or funnel to the receiving equipment continuously or quantitatively in the production process. It can stepless adjust feeding amount and realize the centralized control and automatic control. It can feed material for belt conveyor, bucket elevator, vibrating machinery, crusher, pulverizer etc.

Application :

Vibrating Feeder can be widely used in crushing and screening equipment of metallurgy, coal, mineral separation, construction materials, chemical industry, abrasive and other industries.

Advantages:

1. High efficiency, low operating costs

Vibrating Feeder has high efficiency because its amplitude is stable enough to ensure the liquidity of vibration materials so that can reduce the channel blockage phenomenon. Its structure is simple. Therefore, there are little vulnerable parts. Also, it can save more energy because the power consumption is very low. 

2. High adaptability, low investment

Vibrating Feeder has high adaptability that can work at dusty or moist environment. And the volume is small, the weight is light. Also, the cost performance is high because less investment can gain more.

3.Low noise, little pollution

The noise of machine is low. Through the closed structure,it can prevent dust pollution.

 

 

The analysis of moving trajectory of trommel screen screening material

In the process of movement of material, the screen surface has a frictional influence on it. Therefore, the material will go up along the mesh of trommel screen in a radial direction. After reaching a certain height, the material will go down automatically because its friction is less than its gravity. Moreover, the inlet of trommel screen is high while the outlet is low generally. Thus, materialin the drum goes forward in a “S” type way.

   In general, the screen in the inlet is fine screen while it in the outlet is coarse screen. And the closer the material nears inlet, the slighter the screening material is. Due to low power consumption of trommel screen, easy to achieve large scale and layout in the production process, the inletand outlet is easy to lay out. The most common production process is as following: belt conveyor / screw conveyor -----> trommel screen -----> belt conveyor / screw conveyor.