Idler is an important part of belt conveyor. It has a large number of types and can support the weight of conveyor belt and materials. It accounts for 35% of the total cost of a belt conveyor and produces more than 70% of the resistance, so the quality of the idler is particularly important. It is made of steel and plastic.

Chinese name Idler, foreign name Roller, function, support, conveyor belt and material weight, nature, important parts of belt conveyor are classified into steel and plastic according to material quality

catalogue

1 Basic introduction

2 Main classification

▪ ceramics

▪ nylon

▪ Trough shape

▪ buffer

3 Scope of application

4 Bearing category

5 Type standard

▪ type

▪ standard

6 Working principle

7 Influencing factors

8 Welding process

9 Operation

10 Maintenance

Basic introduction, editing and broadcasting

The role of idler is to support the conveyor belt and material weight. The idler must operate flexibly and reliably. Reducing the friction between the conveyor belt and the idler 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 its structure is not complex, it is not easy to produce high-quality idler.

The criteria for judging whether the idler is good or bad are as follows: the radial runout of the idler; Flexibility of idler; Axial displacement.

Main category editing and broadcasting

1. It can be divided into rubber idler, ceramic idler, nylon idler and insulating idler according to the material.

2. There are mainly troughed idler groups, various parallel idler groups, various centering idler groups, and various buffer idler groups.

(1) Trough idlers include ordinary idlers, forward inclined idlers, quick change bearing idlers, hanging idlers, three chain idlers, reversible idlers, groove angle changing idlers, transition idlers, V-shaped idlers, etc;

(2) Parallel idlers include ordinary idlers, comb idlers, forward inclined idlers, steel rubber idlers, spiral idlers, etc;

(3) Self aligning idler includes universal idler, friction reversible idler, strong idler, tapered idler, spiral idler, combined idler, etc;

(4) Buffer idler includes spring plate idler, buffer ring idler, strong buffer idler, adjustable elastic idler, hanging idler, etc;

ceramics

Ceramic idler

Ceramic idler

Ceramic idlers are referred to as porcelain idlers for short. This product not only has the characteristics of wear resistance, acid and alkali resistance, oxidation resistance, stable operation, anti-theft and so on, but also can effectively prevent belt deviation, reduce local loss of the belt, extend the service life of the belt, and reduce the frequent replacement of idlers for use in harsh outdoor environments. Ceramic idlers have a much longer service life than ordinary idlers. Ceramic idler has high strength and good wear resistance. Ceramic idler has a long service life and can reduce belt wear. High temperature resistance, oxidation resistance, strong corrosion resistance, ceramic idler is suitable for various harsh environments. No static electricity, it is not easy to produce sparks when wearing and colliding, and the ceramic idler is suitable for coal well and other easy environments. Stable performance, which can effectively prevent belt conveyor from deviation, pulling fork and heating ignition.

nylon

Nylon idler: low friction coefficient, wear-resistant, not easy to damage the belt. It has excellent self-lubricating property, can operate under harsh environmental conditions without oil injection, is not easy to get stuck, and has good antimagnetic characteristics. It has strong corrosion resistance, aging resistance, corrosion resistance to weak acids, weak alkalis and organic solvents, non toxicity and pollution, and can withstand repeated shocks and vibrations. The nylon idler itself is light, only one third of the metal parts. It is easy to install, low maintenance rate, low noise, stable operation, energy saving, and can improve the service life of the nylon idler. The nylon idler has good dust-proof and waterproof performance. It is not easy to enter water when used in a dusty environment. The specifications and models of nylon idlers produced by Yima idlers are complete, and the diameter and length can be produced. Special specifications can be customized.

Features of nylon idler:

1. Nylon idler has extremely high wear resistance, extremely low friction coefficient, and is not easy to wear the belt;

2. Nylon idler has excellent self-lubricating property, no need to inject oil, and it is not easy to get stuck in bad conditions;

3. Nylon idlers are anti-static, anti smoldering, anti-aging, and resistant to chemical (acid, alkali and organic solvent) corrosion;

4. Can withstand repeated impact and vibration;

5. The ambient temperature range of nylon idler is - 40 ℃~80 ℃;

6. Excellent mechanical performance, light weight, convenient installation, no maintenance;

7. Nylon idlers have low noise (3-7DB), smooth operation and long service life (3-5 times the service life of metal idlers)

Trough shape

Performance characteristics of trough idler:

1. The grooved idler has the characteristics of corrosion resistance: acid, alkali and salt are difficult to corrode it.

2. The groove idler has strong hardness: strong wear resistance.

3. Good sealing performance: the grooved idler is fully sealed, and plastic labyrinth seals are installed at both ends. The oil and grease will not leak, which can make the rolling shaft last for a long time; The troughed idler operates in a fully sealed state.

4. Ceramic surface of troughed idler: it forms oxide film, has smooth surface, does not adhere to materials, has small contact friction coefficient with the conveyor belt, and reduces the winch driving force.

5. Long service life of grooved idlers: grooved idlers are 2-5 times longer than steel idlers, and can reduce belt wear, prevent belt from running away, and extend belt service life.

6. Low operating cost: trough idler can reduce the comprehensive cost of belt conveyor and reduce maintenance man hours.

Troughed idlers are widely used in the environment with large dust and high corrosivity in the open air, such as mines, power plants, steel plants, stone plants, cement plants, coal washing plants, salt plants, alkali plants, fertilizer plants, wharfs and other transportation sites.

buffer

Impact idler, which is used at the receiving place of belt conveyor to mitigate the impact of blanking on the conveyor belt, is a kind of idler developed mainly for corrosive environments such as coal washing plant, coking plant and chemical plant. Its toughness is more than 10 times that of ordinary metals, and its service life is five times that of traditional shoes. It is corrosion-resistant, flame retardant, anti-static, light weight, etc. It is widely used in mining. It is a special polymer material for idler body. Its mechanical properties are similar to that of bronze. It has good wear resistance and good self-lubricating performance, without damaging the belt. The buffer idler has excellent anti-corrosion performance. The roll body and sealing elements are made of high polymer materials, which are corrosion resistant. In corrosive occasions, the service life can reach more than 5 times of that of ordinary idler.

The buffer idler has light weight and small rotation inertia. The special polymer material for idler is light, with the specific gravity being one seventh of that of steel. The weight of idler made of this material is about one half of that of ordinary idler, with low rotation inertia and low friction between idler and belt.

The buffer idler is installed below the receiving section of the conveyor to reduce the impact of materials on the conveyor belt during blanking, so as to prolong the service life of the conveyor belt. The spacing of the buffer idler is generally 100-600mm.

In terms of installation, the first is to improve the installation density; Second, check frequently and replace the damaged idler in time. For the conveyor belt with large blanking drop, it is recommended to install a buffer air lock and replace the buffer idler with a buffer bed. In terms of purchasing, the following precautions are put forward according to the characteristics of the buffer idler: the radial runout, flexibility, axial displacement, dust prevention, waterproof, axial bearing and impact resistance of the idler.

(1) Temperature protection of buffer idler

When the temperature of the belt conveyor drum is out of limit due to the friction between the belt and the drum, the detection device installed close to the drum will send an overtemperature signal. After receiving the signal, the receiver will delay for 3s to execute part of the action, cut off the power supply of the motor, and the conveyor will stop automatically to protect the temperature.

(2) Idler group speed protection

In case of conveyor failure, such as motor burning, mechanical transmission part damage, belt or chain breaking, belt slipping, etc., the magnetic switch in the accident sensor SG installed on the driven part of the conveyor cannot be closed or cannot be closed at normal speed. In this case, the control system will operate according to the inverse time characteristics and after a certain delay, the speed protection circuit will work to make the executive part act and cut off the power supply of the motor to avoid the expansion of the accident.

(3) Coal level protection of buffer idler coal bunker

Two high and low coal level electrodes are set in the coal bunker. When there is no empty car in the coal bunker and the coal cannot be discharged, the coal level will gradually rise. When the coal level rises to the high level electrode, the coal level protection will act. Starting from the first belt conveyor, each conveyor will stop in turn due to the coal stacking at the tail of the machine.

Applicable scope Edit broadcast

Mining idler:

Ordinary idler: grain, loading and transfer

Trough idler: coal, cement, electric power

Trough type centering idler: metallurgy. Mine, electric power, cement, chemical industry, building materials, steel plant, transmission equipment.

Drum idler: metallurgy, chemical industry, coal, building materials

Floor roll: applicable to mining industry

Stop roll and vertical roll: applicable scope conveyor

Hanging idler: applicable scope Belt conveyor

Backstop idler: applicable to metallurgy. Mining, electric power, cement, chemical industry, building materials, steel

Spiral idler:

1) Spiral lower idler: applicable to coal, electric power, metallurgy, chemical industry, building materials

2) Spiral cleaning idler: Scope of application Coal mine machinery

3) Two way spiral rubber idler: applicable to conveyor, packaging machinery, food machinery, mining equipment and others

Parallel idler:

1) Parallel upper idler: parallel lower idler: scope of application Port terminal, mine conveying, mechanical equipment

2) Parallel centering idler. Parallel centering idler: scope of application to prevent belt deviation

Comb idler: mine, wharf, coal, power plant, coking, export trade

Tapered idler:

1) Tapered self-aligning idler: applicable to port, power, coal mine, machinery factory, grain transportation, chemical industry

2) Tapered lower centering idler: applicable to port, power, coal mine, machinery factory, grain transportation, chemical industry

Friction idler: metallurgy, chemical industry, coal, building materials

1 Friction aligning idler. Friction centering idler: scope of application Conveying machinery

Buffer idler: scope of application: power plant and cement plant

Rubber ring buffer idler: special for idler

Parallel buffer idler: application scope coal mine

Adjustable groove angle double spring buffer idler group: scope of application Port wharf, mine transportation, mechanical equipment

Spring plate buffer idler: Applicable scope Conveyor

Triple articulated idler: coal mine, wharf, export trade, conveyor

Single groove roller:

Double chain roller: widely used in machinery, mining, electronics, light industry, food, post, wood processing, tobacco, rubber, logistics distribution center and other industries.

O-belt roller: applicable to all conveying occasions

Conical roller: applicable to conveying, curve conveyor and track machine

Double groove roller: applicable to hardware, electronics and conveyor

Car made roller: applicable to machinery, food, electronics, wood industry, mining, etc

Power roller: applicable to all kinds of power and non power conveyors

Single chain roller: applicable to all kinds of power and non power conveyors

Non powered roller: applicable to food, tobacco, medicine, rubber, etc

Metal unpowered cone roll: applicable to food, tobacco, medicine, rubber, etc

Straight pipe cone sleeve non power cone roll, straight pipe rubber coating non power cone roll: applicable range Bearing/conveying/conveying/traction/power

Idler accessories

Buffer apron: It is applicable to the buffer idler of belt conveyor, and is widely used in petrochemical industry, iron and steel metallurgy, mining, food processing, automobile manufacturing and park amusement equipment.

Idler bracket: coal, chemical, mining and other transportation fields, applicable scope: mine accessories, applicable object: mine

Bearings: mechanical equipment for use

Bearing pedestal: mining belt conveyor idler and other conveying equipment

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

Sealing washer: applicable to automobiles, electrical appliances, bearings, pumps, cylinders, idlers and others

Stamping hook: applicable range Hardware

Comb shaped rubber ring: applicable to automobiles, bearings, idlers and others

Comb roll spacer: not found

Circlip: application scope Fasteners for mechanical industry

Idler shaft: applicable to power plants and mines

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

Elastic cylindrical pin: scope of application Fasteners for mechanical industry

Connector: application scope: indispensable pipeline connecting element in hydraulic transmission technology

Editing and broadcasting of bearing category

Idler bearing: Idler bearing is a kind of deep groove ball bearing, which can be customized according to different requirements of users. The price of products can be controlled through the process. Different bearing clearances can be made according to the required standards. For example, C3, C4, 4G, etc. Professional production is the basis of market competitiveness. KA bearing: KA bearing is a kind of nylon retainer bearing commonly used on idler. It is mainly used for mine conveying equipment. Nylon retainer can effectively prevent static electricity caused by rotating friction. Class 0 deep groove ball bearings: a one-stop production line specializing in the production of deep groove ball bearings, which can produce various models and meet the national standard. 60 80 180 open type and various non-standard deep groove ball bearings. Acting manufacturer bearings: The company has maintained a long-term friendly cooperative relationship with many bearing manufacturers, exchanging goods to make up for its product shortage. It is convenient for customers. Low noise motor bearing: the company acts as the agent of special motor bearing for a long time. Z1 Z2 Z3 silent bearing. It has absolute quality and price advantages. The following is an introduction to the types and models of bearings frequently used by idlers.

Open idler bearing

This type is the most common type of idler bearing. Open type bearing is also called flat bearing. Since the bearing itself does not have a seal, the idler is protected by several layers of nylon idler bearing seal rings. The sealing performance is already very good. The bearing is then sealed more to do more. Before installation of open type idler bearing, you can master the lubricating grease filling amount of the idler bearing according to the actual situation. The cost of the open idler bearing is also superior to that of the sealed idler bearing. It is convenient to improve the market competitiveness of idler and even conveyor!

Common types of open idler bearings:

six thousand two hundred and four

six thousand two hundred and five

six thousand two hundred and six

six thousand three hundred and five

six thousand three hundred and six

six thousand three hundred and seven

six thousand three hundred and eight

6204/C3

6205/C3

6206/C3

6305/C3

6306/C3

6307/C3

6308/C3

6204/C4

6205/C4

6206/C4

6305/C4

6306/C4

6307/C4

6308/C4

KA retainer bearing

This kind of bearing is mostly used for mine conveying machinery, and the mining materials must have coal safety certificate. The nylon retainer bearing conforms to the national coal safety certificate specifications. Useful to avoid static electricity caused by rolling bearings. The characteristics of the solid nylon stand are that the strength and elasticity have an outstanding connection, the nylon has an outstanding sliding function with the lubricated steel surface, and it is lubricated with the surface of the stand touched by the rolling body, with few conflicts, so the heating and wear in the bearing are very low. Low density data means that the inertia of the stick frame is very small. Nylon holder has excellent operation characteristics in case of lack of lubricant, which allows the bearing to run continuously for a period of time without locking and further damage soon.