What Are Conveyor Belt Idlers

- Dec 26, 2018-

Rollers are important parts of belt conveyors. They are available in a wide variety and can support the weight of conveyor belts and materials. It accounts for 35% of the total cost of a belt conveyor and produces more than 70% resistance, so the quality of the rollers is particularly important. It is available in both steel and plastic.

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Basic Information

Name: Roller

Function: support conveyor belt and material weight

Nature: important parts of belt conveyor

Classified by material: steel and plastic

basic introduction

The role of the rollers is to support the conveyor belt and material weight. The roller must be flexible and reliable. Reducing the friction between the conveyor belt and the idler roller plays a key role in the life of the conveyor belt, which accounts for more than 25% of the total cost of the conveyor. Although the idler is a small part in the belt conveyor and the structure is not complicated, it is not easy to manufacture a high quality roller.


The criteria for judging the quality of the roller are as follows: the radial runout of the idler; the flexibility of the idler; the axial turbulence.

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Fold edit this paragraph main classification

1. According to the material, it is divided into rubber roller, ceramic roller, nylon roller and insulated roller.


2. There are mainly grooved roller sets, various types of parallel roller sets, various types of self-aligning roller sets, and various types of buffer roller sets.


(1) The trough-shaped idler has a common type of idler, a forward-tilt type idler, a quick-change type bearing type idler, a hanging type idler, a three-chain idler, a reversible idler, a variable-angle angle type idler, and a transition type. Roller, V-roller, etc.;


(2) Parallel idlers include ordinary type idlers, comb type idlers, forward-tilt type idlers, steel-type idlers, spiral idlers, etc.;


(3) The self-aligning roller has a universal type, a friction reversible type idler, a strong type idler, a cone idler, a spiral type idler, a combined type idler, and the like;


(4) The buffer roller has a spring plate type idler, a buffer ring type idler, a strong buffer type idler, an adjustable elastic type idler, a hanging type idler, and the like;


Folding ceramic

Ceramic roller is referred to as porcelain roller. This product not only has the characteristics of wear resistance, acid and alkali resistance, oxidation resistance, stable operation, anti-theft, etc., but also ceramic roller can effectively prevent belt deviation, reduce local loss of belt and extend belt use. The service life is reduced, and the frequent replacement of the idler roller is used in the harsh environment of the open air. The ceramic roller has a much longer life than the ordinary roller. The ceramic roller has high strength and good wear resistance. Ceramic rollers have a long service life and reduce belt wear. High temperature resistance, oxidation resistance and corrosion resistance. Ceramic rollers are suitable for various harsh environments. No static electricity, it is not easy to produce sparks when it is worn and worn, and the ceramic roller is suitable for easy environment such as coal well. The performance is stable, which can effectively prevent the belt conveyor from running off, pulling the fork and heating the fire.


Folded nylon

Nylon roller: low friction coefficient, wear resistance, not easy to damage the belt. It has excellent self-lubricating property, can be operated under harsh environmental conditions without oiling during use, is not easy to be stuck, and has good anti-magnetic properties. Corrosion resistance, strong aging resistance, resistance to weak acid, weak alkali and organic solvent corrosion, non-toxic and non-polluting can withstand repeated shock and vibration. The nylon roller itself is light in weight, only one-third of the metal parts, easy to install, low maintenance rate, low noise, stable operation, energy saving, and can improve the use period of the nylon roller dustproof, waterproof performance, in a multi-gray environment Use, not easy to enter the water. The nylon roller produced by the wing horse roller has a complete range of specifications, which can be produced in diameter, length and special specifications.


Nylon roller features:


1. The nylon roller has extremely high wear resistance, extremely low friction coefficient, and is not easy to wear the belt;


2, nylon roller has excellent self-lubricating, no oil injection, it is not easy to be stuck under harsh conditions;


3, nylon roller has anti-static, anti-smoldering, anti-aging, chemical resistance (acid, alkali and organic solvents) corrosion;


4, can withstand repeated shocks and vibrations;


5, nylon roller use ambient temperature range: -40 ° C ~ 80 ° C;


6, excellent mechanical performance, light weight, easy to install, no maintenance;


7, nylon roller low sound (3-7DB) running smoothly, long life (3-5 times the life of the metal roller)


Folded trough

Performance characteristics of the grooved roller:


1. The grooved roller has the characteristics of corrosion resistance: the acid and alkali salts are hard to corrode.


2. The grooved roller has strong hardness: strong wear resistance.


3. Good sealing: the grooved roller is fully sealed, plastic labyrinth sealing ring is installed at both ends, oily grease will not leak, and the rolling shaft can be long-term; the grooved roller is in full sealing state.


4. Grooved roller ceramic surface: The oxide film is formed, the surface is smooth, the material is not adhered, and the friction coefficient with the conveyor belt is small, which reduces the driving force of the hoisting.


5. The long life of the grooved roller: the grooved roller is 2-5 times longer than the steel roller, and can reduce the belt wear, the belt does not run, and prolongs the service life of the belt.


6. Low operating costs: The trough-type idler can reduce the overall cost of the belt conveyor and reduce maintenance man-hours.


The trough type roller is widely used in all kinds of transportation places such as mines, power plants, steel plants, stone factories, cement plants, coal washing plants, salt plants, alkali plants, fertilizer plants, docks, etc. Grooved rollers are often used.


Folding buffer

Impulse idler, buffer roller used in belt conveyor to reduce the impact of blanking on the conveyor belt, mainly for the corrosive environment of coal washing plant, coking plant, chemical plant and other types of rollers It has 10 times more toughness than ordinary metal, five times the life of traditional column shoes, corrosion-resistant flame retardant, anti-static, light weight and other characteristics, widely used in mining. The special polymer material for the roller body has mechanical properties similar to bronze, has good wear resistance, and has good self-lubricating properties, and does not hurt the belt. The cushioning roller has excellent anti-corrosion performance. The roller body and the seal are made of polymer material and are corrosion resistant. Used in corrosive applications, the service life can reach more than 5 times that of ordinary rollers.


The cushioning roller is light in weight and has a small rotational inertia. The special polymer material for the roller is light in weight and the specific gravity is one-seventh of that of the steel. The roller made of this material has a weight of about one-half of that of the ordinary roller, and the rotation inertia is small, between the roller and the belt. The friction is small.


The buffer roller is installed under the receiving section of the conveyor to reduce the impact of the material on the conveyor belt during the blanking, and the service life of the conveyor belt is generally 100-600 mm.


In the installation of the buffer roller, the density of the installation is increased; the second is to check frequently and replace the damaged roller in time. It is recommended to install a buffer locker for the conveyor belt with a large drop drop, and replace the buffer idler with a buffer bed. According to the characteristics of the buffer roller, some considerations are given in the purchase: the radial runout of the idler, the flexibility of the idler, the axial turbulence, the dustproof performance of the roller, the waterproof performance, the axial load bearing capacity of the idler, Roller impact resistance and so on.


(1) Buffer roller temperature protection


When the belt conveyor roller and the belt friction cause the temperature to exceed the limit, the detection device attached to the drum will send an over-temperature signal. After receiving the signal, the receiver will delay the 3s to perform part of the action, cut off the motor power supply, and the conveyor automatically Stopped for temperature protection.


(2) Roller set speed protection


If the conveyor fails, such as motor burnout, mechanical transmission damage, belt or chain breakage, belt slip, etc., the magnetron switch installed in the accident sensor SG on the conveyor is not closed or cannot be closed at normal speed. At this time, the control system will perform a certain delay after the inverse time characteristic, and the speed protection circuit will act to perform part of the action and cut off the power supply of the motor to avoid accident expansion.


(3) Buffer roller coal bunker protection


There are two high and low coal level electrodes in the coal bunker. When the coal bunker can't put coal out of the empty car, the coal level will gradually increase. When the coal level rises to the high electrode, the coal level protection action starts from the first belt conveyor. Each conveyor will stop in turn due to the tail coals.


Folding and editing this paragraph

Mining roller:


Ordinary roller: grain, loading and transportation


Groove roller: coal, cement, electricity


Groove centering roller: metallurgy. Mine, electric power, cement, chemical, building materials, steel plants, conveying equipment.


Drum type roller: metallurgy, chemical industry, coal, building materials


Ground Roller: Mining in the applicable field


Roller, vertical roller: applicable range conveyor


Hanging roller: applicable range belt conveyor


Reverse stop roller: metallurgy for applicable fields. Mine, electric power, cement, chemical, building materials, steel


Spiral roller:


1) Spiral lower roller: applicable scope coal, electric power, metallurgy, chemical industry, building materials,


2) Spiral cleaning roller: scope of application of coal mining machinery


3) Two-way spiral rubber roller: suitable for object conveyor, packaging machinery, food machinery, mining equipment, other


Parallel rollers:


1) Parallel upper roller: parallel lower roller: applicable range port terminal, mine transportation, mechanical equipment


2) Adjust the heart roller in parallel. Adjust the heart roller in parallel: Scope of application to prevent belt deviation


Comb-shaped rollers: mines, docks, coal, power plants, coking, export trade


Conical roller:


1) Conical upper heart roller: applicable fields port, electric power, coal mine, machinery factory, grain transportation, chemical industry


2) Conical lowering heart roller: applicable fields port, electric power, coal mine, machinery factory, grain transportation, chemical industry


Friction roller: metallurgy, chemical, coal, building materials


1 Friction up the heart roller. Friction down-centering roller: Scope of application conveyor


Buffer Roller: Scope of Application Power Plant, Cement Plant


Rubber ring cushion roller: applicable range roller


Parallel buffer roller: scope of application


Adjustable groove angle double spring buffer roller set: applicable range port terminal, mine transportation, mechanical equipment


Spring plate cushioning roller: applicable range conveyor


Triple articulated roller: coal mine, dock, export trade, conveyor


Single grooved roller:


Double-chain roller: It is widely used in machinery, mining, electronics, light industry, food, postal, wood processing, tobacco, rubber, logistics and distribution centers.


O belt roller: applicable range of various conveying occasions


Conical roller: suitable for conveying, curved conveyor, rail machine


Double grooved roller: suitable for hardware, electronics, conveyor


Roller for vehicles: Applicable to machinery, food, electronics, wood, mining, etc.


Power roller: The scope of application is applicable to all kinds of power and non-power conveyors.


Single-chain roller: Applicable to all types of power and non-powered conveyors


Unpowered roller: Scope of application of food, tobacco, medicine, rubber, etc.


Metal unpowered cone roller: Scope of application Food, tobacco, medicine, rubber, etc.


Straight tube taper sleeve without power cone roller, straight tube rubberized non-power cone roller: applicable range bearing / conveying / conveying / traction / power


Roller accessories


Buffer rubber ring: suitable for belt conveyor cushion roller, widely used in petrochemical, steel metallurgy, mining, food processing, automobile manufacturing and park amusement equipment.


Roller bracket: coal, chemical, mining and other transportation fields, applicable range of mine accessories, applicable to mining


Bearing: use mechanical equipment


Bearing housing: mining belt conveyor idler and other conveying equipment


Rolling bearing housing products are mainly used in various mining machinery, metallurgy, paper, textile and other fields.


Gasket: Scope of application Automotive, electrical appliances, bearings, pumps, cylinders, rollers, other


Stamping Hook: Scope of Application Hardware


Comb-shaped apron: applicable range car, bearing, roller, other


Comb roll spacer: not found


Snap spring: application range of fasteners for the mechanical industry


Roller shaft: applicable range power plant, mine


Retaining ring: application range mechanical bearing electrical appliances, mechanical equipment


Elastic Cylindrical Pin: Application Range Mechanical Industry Fasteners


Connector: the indispensable pipe connection component in the hydraulic transmission technology