Three Types of Conveyor Belt Stretching

1. Elastic stretching
   1. Happens at the time of belt conveyor system acceleration or braking deceleration;
   2.  Happens at the time when pulling stress disappears, and can almost be fully recovered.

2. Structural stretching
   1. The possibility due to the conveyor belt fabric type is higher than that due to the textile type.
   2. In the fabrics that weaved according to traditional types, the frizzy

Yarn is easily to stretch when the belt conveyor system is loaded, certain part of this conveyor belt stretching is unable to be recovered.

3. Permanent change in length (permanent stretching)

Mainly caused by the fundamental fabric structure stretching, unrecoverable elastic stretching or structural stretching.

For more information, please visit http://www.pkbeltconveyor.com.

How to Select Model of Belt Conveyor

Belt conveyor is a continuous material delivering machinery by rubbing the drive with its main constitute including the frame, conveying belt, pulley, roller, the tightness adjusting device and the gearing device. It can deliver the

material from the primary feeding port to the ending discharging port.

Several aspects listed below are what we should pay attention to in the selection of thebelt conveyor.

1. Weight of the conveying material, external;
2. Dimensions, and handing method;
3. The length of the conveying line and its complex degree;
4. The working condition of belt conveyer and its work shift;
5. the running speed and productivity of the belt conveyor;
6. Special technological requirements.

For more information, please visit http://www.pkbeltconveyor.com.

What Causes the Failure of Belt Conveyor Components and the Solution

Basically, we cannot avoid the failing in work of belt conveyor. The following several points are common phenomenon of belt conveyor components failure analyzed by PK Machinery. We hope to bring you some assistance.

1. The belt fails in rotating;

The drive pulley belt slips and turns without moving forward after the starting of the belt conveyor motor. The belt failing in rotating is due to the insufficient belt tension, overlong of the belt, inappropriate adjustment of the tension equipment, too frequent start-up and the coal piled up at the end of the belt conveyor.

2. Belt is easy to break ;

This problem is mainly caused by the large belt joint, poor belt buckle quality, long time use of the belt and the unprofessional belt maintenance. In this case, we should tighten the tension equipment, change high quality belt in time and improve the maintenance level.

3. Abnormal sound from the reducer

One possible reason is that the abrasive wear of the bearing and gear causes a large gap between them. Or it is because the screw is too loose. In this case, we should replace the bearing, mend the gap and maintain or replace the reducer.

4. Temperature of the reducer rises too fast

It is due to the over mount of lubricant, poor heat dispersion, speed reducer burying in coal. The lubricant oil amount should be reduced and the coal should be removed to solve this problem.

5. Lubricant leakage of the reducer

The main reason includes the sealing ring is damaged, the reducer surface is not flat and the bolt is too loose. In this condition, we should change the sealing ring, tighten the connecting surface and the bearing cap bolts.

6. The roller failed in rotating

If the coal powder falls into the roller sealing ring, it will block the conveyor roller and cause strong stress, then the roller would not rotate and even bend. And thus bring damage to the roller bearing. If this happened, we should replace the roller, lower the height of discharging point and the landing point, or use impact roller at the landing point.

Belt running deviation and skid processing method of belt conveyor

• Running deviation has many reasons, according to the different reasons , we need to different treatment:

1. Adjust the carrying idler group.
2. Install the self-aligning roller group.
3. Tension adjustment, tension adjustment is an important link of belt conveyor running deviation.
4. Adjust the driving drum and redirection roller position. And the adjustment of the redirection roller driving drum is an important part of the belt running deviation adjustment.
5. Two-way adjust deviation of belt conveyor.

• Belt skid treatment method:

1. Adjustable tension when the belt conveyor in skid trip to increase tension. Sometimes tensioning trip has not enough, however, belt in the permanent deformation , the belt can be cut part to and sulfide.
2. In the use of nylon belt or EP,tension travel is longer,  when tension trip has not enough, sulfide or increase tension to solve.
3. Heavy hammer tensioning belt conveyor belt skid can add weight to solve,  added until not skid. But should add not too much, avoid belt  bear too much unnecessary tension and reduce the service life of the belt.

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 Select Belt Conveyor Pulley?

You need to provide following parameters before you purchase belt conveyor pulley.
1.Diameter of pulley wall(not include rubber thickness):_________mm.
2.Length of pulley wall:___________mm.
3.Diameter of pulley Shaft:_________mm.
4.Length of pulley Shaft:___________mm.
5.Material of Pulley wall:______________.
6.Material of Pulley shaft:_____________.
7.Bearing brand:_____________.
8.Keyless Locking Devices brand:____________.
9.Surface treatment:______________(coating rubber/galvanized/other)
(1)If coating rubber,thickness of rubber:__________mm
(2)Rubber type:____________(herringbone/rhombus/other)
10.Pulley type:_________(ordinary pulley or motorized pulley)

If motorized pulley,please confirm following information:
(1)Motor installation type:______________(exterior installation or interior installation)
(2)Motor Power:_________Kw.
(3)Motor Voltage:3 phase ______V______Hz.

Besides,in order to ensure conveyor pulley to meet your needs,please confirm the conveyor information:
1.Handling Capacity:________t/h.
2.Belt speed:__________m/s.
3.Driven device Power:_____________kw.
It’s better that if you can provide pulley drawings! 

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.

Tripper Introduction

Belt conveyor tripper is a mobile device which can unload materials at the arbitrary point of horizontal section of the conveyor; it’s a single part of the conveyor. Movable tripper can be divided into light-duty type and heavy-duty type.
► Features
    1.Durable
    2.High efficiency
    3.Simple structure
    4.Stable operation
    5.Easy to maintenance
    6.Multiple discharging points
    7.Moving freely with wheels
 

tripper

► Advantage

    1.Heavy duty structural frames and supports – to provide system rigidity

    2.Heavy duty inlet skirting – to eliminate spillage at discharge transition

    3.Abrasion resistant belting – to reduce wear and increase life span

    4.Heavy duty idlers with anti-friction bearings – to increase idler life and reduce horsepower requirements

    5.High torque drive units – to power through upset conditions 

    6.Modular design shipped with limited field assembly required for drop in, bolt in place field installation

    7.May be fitted to any new or existing conveyor

    8.Single and dual side discharge designs

    9.Evenly distribution of materials 

    10.Save storage space

    11.Powered tripper movement through cable/winch assembly or powered wheels, crowned bend pulleys for positive belt tracking 

    12.Shuttling cross conveyor belt design available with side to side movement

    13.Cross over platform/operator deck available on cross conveyor tripper

    14.Engineered to meet new project requirements and also to retrofit existing conveyors

►  Application
XLP Tripper is always used at a large belt conveyor, it applies in the occasion where the belt conveyor has a discharge requirement, such as mining, power plant, steel plant, port, etc.

Henan Pingyuan Mining Machinery Co., Ltd is the most professional manufacturer of Belt conveyor, and Vibrating screen, Bucket elevator, Screw conveyor, Scraper conveyor using the world's most advanced technology, we are willing to serve every company to meet your custom needs. our goal is "be the future global leader of mining machinery industry". have any questions, please contact us without any hesitation. 

Tel: +86 373 579 9198 

Fax: +86 373 507 1699  

Email: info@pkmachinery.com  

Address: 289 Yellow River Road, Xinxiang City, Henan Province, China