What reasons lead to linear vibrating screen motor base crack ?

All users know that the vibration motor is the vibration source of linear vibrating screen , it will bring inconvenience of operation if the vibration motor base cracks and damages. Here are some analysis reasons for you:
1. Too large motor power ,model selection and exciting force which exceed the normal load of vibrating screen, it will cause damage of motor base for long time operation
2. Too thin steel plate thickness design with long time operation will cause crack.
3. There is a problem with steel plate material.
4. Welding quality can not meet the requirements.
5. The installation position of the motor does not conform to the design requirements of the vibration dynamic specifications.
More product information, please pay attention to www.pkmachinery.com

 

Guide Rail Makes Tripper or Bucket Elevator Perform Better

Guide rail is made of metal or other material to become groove or ridge which is a device that can withstand, fix and guide mobile device or reduce their friction. Longitudinal groove or ridge on the surface of guide rail is used for guiding or fixing machine parts. Moreover, it is also known as sliding rail or linear guides, used in the occasion of linear reciprocating motion. It has a higher rated load and can assume certain torque. At the same time, high-precision linear motion can be achieved in the case of high load.
Guide rail provides a precise operation track for the conveyor tripper car. Matched with the belt conveyor, conveyor tripper car can achieve the aim of discharging materials at any points in the certain length of belt conveyor through moving back and forth on the guide rail.

In general, guide rail is installed in the head, tail and middle part of chain bucket elevator. Also, it is usually made of wear-resistant steel and its surface is quite smooth, so on the one hand it can lessen the friction between chain and guide rail and reduce components depreciation rates, on the other hand it can prevent the chain being off tracking, so as to achieve the purpose of conveying materials efficiently.
PK Machinery adopts the best quality guide rail which is manufactured by Ma'anshan Iron&Steel that is best rail manufacturer in China, and it is used for conveyor tripper car and bucket elevator.

     

How to Resolve Chain Deviation of Buried Scraper Conveyor

1. Check installation quality and take measures to correct mounting dimensions.

1) Check and adjust the flange connections between conveyor casings, make sure the connections are smooth and tightly sealed.

2) Adjust the clearance between chain and conveyor trough. The appropriate clearance value will guarantee the conveyor to operate normally, reduce energy consumption, extend the service life of chain scraper & conveyor trough, and improve transport efficiency.

3) Check and adjust the surface flatness of guide rail. The joints between guide rails should be smooth.

4) Check and adjust head and tail pulleys, which should be on one center line and correct meshing.

5) Correct and replace the deformed scrapers.

6) Repair and replace the worn-out guide rails.

7) Adjust the tension device, make sure the elastic of chain & scraper is moderate, and the tensile force of left and right sides are the same.

2. Adjust material drop point.
Material impact is one of important factors that cause chain deviation. The solution is to install a retaining plate at the inlet. In this case, the material will fall in the middle position of scraper & chain to make sure the chain will be uniformly forced, so as to reduce chain deviation.

3. Install baffle plates on both sides of the chains to prevent deviation phenomenon.

Matters should be noted during belt sway switch installation and adjustment

Belt sway switch is used to check the belt running deviation of the belt conveyor, it is a safe protection device of automatic alarm and stop when the belt running deviation appears.Belt sway switch is fixed on the conveyor belt bracket, action bar is at the side of the belt, when the belt running deviation appears, force the action bar deviation, and touch the alarm micro switch. If the belt running deviation continues,will touch another group of contact, and the conveyor will be protective to stop.
In the installation and adjustment of belt sway switch, what matters should we pay attention to? PK Machinery will answer for you!
1. Belt sway switch should be located on both sides of the conveyor belt, the vertical roll should be vertical with conveyor belt edge flat, and both sides of the conveyor belt are located at 1/3 height of vertical roll.
2.The distance between the vertical roll of belt sway switch and the normal position of conveyor belt should be 50 ~ 100 mm.
3.The quantity of belt sway switch ought to be determined according to the length of the conveyor, types and arrangement. Commonly it is located on the conveyor head, tail, convex segment, concave segment and the middle position.(Note: when the conveyor is longer, a pair of belt sway switch can be located every 30 ~ 35 m.)
4.Belt sway switch connects the conveyor middle frame through the mounting bracket, switch bracket will be welded with conveyor frame after the installing completion of the conveyor, and belt sway switch shall be bolted in the bracket.

How to Select and Install Screen Cloth of Linear Vibrating Screen

The selection and installation of screen cloth is very important for linear vibrating screen. Select the most suitable screen cloth and install it according to correct way can improve the performance and prolong the service life of the linear vibrating screen.
1. How to select the most suitable screen cloth?
a. Because it is complicated for screen cloth installation of linear vibrating screen, we should select the screen cloth with thicker wire diameter.
b. While cutting screen cloth, we should keep the width of screen cloth consistent with the mesh frame, length should be 50-70mm longer than mesh frame.
2. How to install the screen cloth of linear vibrating screen?
a. Since the tensity of screen cloth will affect the screen efficiency directly, we should keep the screen cloth tension during installing the screen cloth.
b. Please confirm whether needs to add the bouncing balls according to mesh size and difficulty level of the screened material.
c. We should add suitable supported mesh size under the screen cloth if the mesh of the screen cloth is high or bulk density of the material is big.
d. While install the pressing plate, we should keep the flatness of the plate and line with strong scalability sponge sealing to lock it uniformly.
e. After completing installation, we should test the condition of feeding material and screening with few materials. If materials run forward uniformly, classify accurately without mixing phenomenon,linear vibrating screen can be used well. If not, we should adjust the linear vibrating screen mesh and test again.

Attapulgite clay rotary vibrating screen was dispatched to South Africa

Last week,PK Machinery dispatched its first batch of cargo from Qingdao port to Johannesburg port in the new year 2016!
The equipment,rotary vibrating screen is used for sieving attapulgite clay with 800kg/m3 density and 8% moisture,the total output is 2 tons per hour.Meanwhile,our client requires 4 lays,mesh sizes are:4mm,2mm,1.18mm,0.5mm.
After knowing well of client’s requirement,PK engineer configured model XZS-1500-4,which can achieve the expected output,besides,we also suggested some screen mesh and vertical motor as spare parts,client spoke highly of our considerate advice and expressed his wish to cooperate with PK Machinery again.
Well begun is half done,we are sure we will advance a further step in 2016!

Application & Development of Vibrating Screen in Food Industry

Vibrating screen used in food industry is a kind of high efficiency screening machinery for high precision fine powder and other materials , which is easy to operate, fully enclosed structure, suitable for granular, powder, mucus and other materials screening and filtering classification. 
Such as powdered sugar, starch, salt, rice flour, milk powder, milk, egg, soy sauce, vinegar, fruit juice, papaya powder, green tea powder, kudzu powder, and potato processing production which are commonly used in daily life,vibrating screen will be a good helper. 
Take starch or rice powder as example, usually the first procedures : impurity removal of raw materials - screening-weighing;secondly , soaking- coarse grinding-germ separation-fine grinding-screening of starch-protein separation-centrifugal dewatering- thermostatic drying, lastly,weighing-product packing. We can not imagine how to deal with the screening in the process of food without vibrating screen. Vibrating screen overcomes the difficulty of fine material screening easily, which also makes food diversified and entire food industry develop rapidly.

Happy 2016 Chinese Spring Festival

Spring festival is coming, which is the most important traditional festivals in China. Feb 8, 2016 is the Chinese traditional New Year of monkey. In China, monkey is a symbol of witty, clever and lively, which represents auspicious omen and our good wishes and luck in the New Year!

 

PK Machinery will have 8 days’ Spring Festival holiday (05/02/2016-12/02/2016), if you have any question or inquiry, please leave message to Mr. Can Wang:

Can Wang
Tel:+86 15836006651	Skype:pkmachinery12
Whats App: +86 15836006651	Wechat Ming751670143
Email: can@pkmachinery.com	QQ: 751670134

PK Machinery wishes all of you around the world a happy monkey’s year, good luck! Also hope we can establish good relationships with you and together to create a good year in 2016!
Thanks for your long time trust and support & Happy New Year!

Difference between forging and casting of scraper chain machining process

Forging and casting is commonly used in the mechanical processing of scraper chain, but do you know the differences? Today, PK Machinery will introduce it in details.
Forging is a processing method which uses the forging machinery occurs pressure to metal blank, make it produce plastic deformation to obtain a certain mechanical properties, a certain shape and dimension.
Casting is the process thatmakes the metal melt into a certain requirements of liquid and pour into the mold, after cooling, solidification, and cleaning the whole process to obtainwith a predetermined shape, size and performance of the casting (parts or blanks).
Generally forging chain mechanical properties are generally better than the same kind of casting chain, but the cost is higher. Although the cost of casting is low, but the production needs more materials and equipment, it will produce dust, harmful gases and noise which will pollute the environment, so we will choose forging chain as the traction component of scraper conveyor in most cases.

The application of conveyor belt fluid coupling

Fluid coupling is a used fluid transmission component. Motor drives coupling pump wheel rotation, pump impeller blade agitates intracavitary working liquid, under the centrifugal effect,pump wheel turns mechanical energy into liquid energy, then passes to the turbine blades, turbine passes the absorbent liquid energy to the machine.
Fluid coupling has the function of flexible transmission,slow down the impact and the isolation of torsional vibration, prolong the start-up time, reduce the starting current,make the motor light load start-up, solve the problem of heavy large inertia load start-up difficulties and protect the motor when overloads, energy and power saving effects are remarkable.
On the conveyor, fluid coupling has the function of connecting motor and reducer ,it replaces the mechanical coupling. The belt conveyor fluid coupling has two effects:
1.Overload protection
If the belt conveyor is overload, fluid coupling slip frequency increases, working fluid warms up, fluid coupling will spray without burning motor to a certain temperature. Of course sometimes coupling will be installed with a temperature control device, when work liquid superheats, temperature control device can control the motor and cut the power cut to protect the motor.
2. Flexible-start
When motor starts,belt conveyor starts slowly and acceleratedly , this can reduce the grid big impact to make the motor start up in light load. At the same time,it can reduce the effect of belt tension,protect belt and prolong life, especially under the heavy load start-up.