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China Suppliers Factory Impact Idler Roller - Corrosion-Resistant Rubber Buffer for Belt Conveyors
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China Suppliers Factory Impact Idler Roller - Corrosion-Resistant Rubber Buffer for Belt Conveyors
Introducing the Impact Idler, a specialized component designed for corrosive environments such as coal washing plants, coking plants, and chemical plants. This product is essential for belt conveyors, effectively reducing the impact of falling materials on the conveyor belt. Engineered with advanced polymer materials, the Impact Idler boasts over 10 times the toughness of conventional metals and five times the lifespan of traditional column shoes. Its unique properties include exceptional corrosion resistance, flame retardancy, anti-static characteristics, and lightweight design, As a leading supplier and factory in China, we ensure that our Impact Idlers are crafted to deliver outstanding performance in mining operations. The roller body is designed to mimic the mechanical properties of bronze, providing excellent wear resistance and self-lubricating performance, all while preventing damage to the belt. With superior anti-corrosion capabilities, our buffering rollers feature polymer materials in both the roller body and sealing components, significantly enhancing durability. In corrosive environments, the service life of our Impact Idlers can exceed five times that of ordinary rollers, making them the ideal choice for your industrial needs
The buffer roller is lightweight and has low rotational inertia. The specialized polymer material for rollers is lightweight, with a specific gravity of one seventh that of steel. Rollers made from this material weigh about half of ordinary rollers, have low rotational inertia, and low friction between rollers and belts.
Purpose
Buffer rollers are installed below the receiving section of the conveyor to reduce the impact of materials on the conveyor belt during material dropping, thereby extending the service life of the conveyor belt. The spacing between buffer rollers is generally 100–600 millimeters.
Standard Diameter Parameters
According to the Chinese national conveyor industry standards, there are four standard types of buffer roller diameters for belt conveyors with a belt width of 500mm–1400mm:
Ø 89 mmØ 108 mmØ 133 mmØ 159 mm
With the emergence of wide belt conveyors, the diameter of buffer rollers has also shown an increasing trend.
Installation and Selection
In terms of installation, the buffer roller is designed to increase the density of installation. It is also important to regularly inspect and replace damaged rollers in a timely manner. For conveyor belts with large drop heights, it is recommended to install buffer air locks and replace the buffer rollers with buffer beds.
In terms of purchasing, the following precautions should be taken based on the characteristics of the buffer roller:
Radial runout of the roller
Flexibility of the roller
Axial displacement
Dust and water resistance of the roller
Axial bearing capacity of the roller
Impact resistance of the roller
Protection
1
Buffer Roller Temperature Protection
When the temperature of the belt conveyor drum exceeds the limit due to friction with the belt, the detection device installed closely to the drum sends an overtemperature signal. After receiving the signal, the receiver delays for 3 seconds, causing the execution part to act, cutting off the power supply to the motor, and the conveyor automatically stops running, providing temperature protection.
2
Roller Group Speed Protection
If the conveyor malfunctions — such as the motor burning out, the mechanical transmission part being damaged, the belt or chain being pulled apart, or the belt slipping — 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. At this time, the control system will follow the inverse time characteristic and, after a certain delay, the speed protection circuit will take effect, causing the executing part to act and cutting off the power supply to the motor to avoid the accident from expanding.
3
Buffer Roller Coal Bunker Coal Level Protection
There are two coal level electrodes in the coal bunker — high and low. When there is no empty car in the bunker, the coal level will gradually rise. When the coal level reaches the high level electrode, the coal level protection will be activated. Starting from the first belt conveyor, each conveyor will stop one by one due to the stacking of coal at the tail of the machine.
Frequently Asked Questions (FAQ)
Q
What makes buffer rollers lighter than ordinary rollers?
Buffer rollers are made from specialized polymer materials with a specific gravity of only one seventh that of steel. As a result, rollers manufactured from this material weigh approximately half as much as conventional steel rollers, significantly reducing rotational inertia and belt friction.
Q
Where are buffer rollers installed on a conveyor system?
Buffer rollers are installed below the receiving section of the conveyor. Their primary role is to absorb the impact of falling materials on the conveyor belt, thereby reducing wear and extending the belt's service life. The recommended spacing between buffer rollers is 100–600 mm.
Q
What are the standard diameter sizes for buffer rollers?
According to Chinese national conveyor industry standards, four standard buffer roller diameters are available for belt conveyors with a belt width of 500mm to 1400mm: Ø 89mm, Ø 108mm, Ø 133mm, and Ø 159mm. Larger diameters are increasingly used with wide belt conveyor systems.
Q
What should be considered when selecting buffer rollers?
When purchasing buffer rollers, key performance factors to evaluate include: radial runout, roller flexibility, axial displacement tolerance, dust and water resistance ratings, axial bearing capacity, and overall impact resistance. Selecting rollers with optimal ratings in these categories ensures longer service life and reliable operation.
Q
How does temperature protection work for buffer rollers?
A detection device is installed in close contact with the conveyor drum. If the drum temperature exceeds safe limits due to excessive belt friction, an overtemperature signal is sent. After a 3-second delay, the system cuts power to the motor and stops the conveyor automatically to prevent damage or fire hazards.
Q
What happens when the coal level in the bunker reaches the high-level electrode?
When the coal level rises to the high-level electrode inside the coal bunker, the coal level protection system is triggered. Beginning with the first belt conveyor in the sequence, each conveyor shuts down one by one due to coal stacking at the tail end, preventing overflow and equipment overload.
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