What are the requirements for idler rollers used in coal mines?

Coal mine conditions are complex,with high dust levels,high humidity,and strong material impacts,placing strict requirements on the safety,wear resistance,sealing,explosion-proof performance,and durability of idler rollers.

Idler rollers must possess excellent sealing performance,employing a multi-labyrinth seal structure to prevent coal dust,coal powder,and mud from entering the bearings,avoiding jamming,abnormal noise,and premature damage,and adapting to the high dust and high humidity environment underground.High-strength steel idler rollers are preferred,with thick walls,impact resistance,and wear resistance,capable of withstanding long-term scouring and impact from coal and gangue.

Buffer idler rollers,equipped with rubber buffer rings,should be used at coal mine discharge points and transfer points to reduce the impact of falling materials,protect the conveyor belt and frame,and reduce equipment failure rates.Idler rollers should have low rotational resistance and flexible rotation to reduce belt wear and motor load,improve conveying efficiency,and reduce energy consumption.

In terms of safety,coal mine idler rollers must meet mine safety standards,with a stable structure,firm welding,good dynamic balance,smooth operation without jumping,and elimination of safety hazards.Simultaneously,long service life and easy maintenance are required to reduce the frequency of underground replacements and lower labor and downtime costs.

Only coal mine-specific idlers that meet these requirements can adapt to harsh working conditions,ensure continuous and stable operation of conveyors,and improve coal mine production efficiency.

GB/T 7714：

MT/T 157‑2000.煤矿用带式输送机托辊技术条件[S].北京:煤炭工业出版社,2000;ISO 15236‑2:2007.Belt conveyors—Safety requirements—Part 2:Conveyors for bulk materials[S].Geneva:International Organization for Standardization,2007;CEMA.Belt Conveyors for Bulk Materials–Idlers,2019 Edition[S].[Online].Available:https://www.cemanet.org

APA：

MT/T 157‑2000.(2000).煤矿用带式输送机托辊技术条件[Technical specifications for coal mine belt conveyor idlers].Beijing:Coal Industry Press.

ISO 15236‑2:2007.(2007).Belt conveyors—Safety requirements—Part 2:Conveyors for bulk materials.Geneva:International Organization for Standardization.

CEMA.(2019).Belt Conveyors for Bulk Materials–Idlers(2019 Edition).Retrieved from https://www.cemanet.org

MLA：

MT/T 157‑2000.煤矿用带式输送机托辊技术条件.北京:煤炭工业出版社,2000.

ISO 15236‑2:2007.Belt Conveyors—Safety Requirements—Part 2:Conveyors for Bulk Materials.Geneva:International Organization for Standardization,2007.

CEMA.Belt Conveyors for Bulk Materials–Idlers.2019 Edition.https://www.cemanet.org