Rokee® Customized Initial-rolling Gear Couplings For Large Hot-rolling Mill for Customers, Rokee® is a well-known high-quality supplier of couplings and technical services in China.
As the core component of heavy equipment transmission in the metallurgical industry, the initial rolling gear coupling of a large hot rolling mill undertakes the dual mission of transmitting large torque and compensating for complex working conditions.
The specialized gear coupling for large hot rolling mills adopts a double drum tooth meshing structure, and its core components include:
External gear sleeve: a spherical profile with a tooth tip curvature radius of 1.5-3m, and a tooth thickness gradually decreasing from the middle to both ends by 0.15-0.3mm. It is achieved through five axis CNC machining to achieve uniform contact across the entire tooth width. This design optimizes the contact stress distribution by 40% compared to straight tooth couplings, while maintaining an effective meshing area of over 85% even at an angular displacement of 1.5 °.
Internal gear ring: Made of 42CrMoA alloy steel, forged as a whole, and subjected to deep carburizing and quenching treatment (infiltration layer depth of 2.5-3.2mm), the tooth surface hardness reaches HRC58-62, and the core maintains HB280-320 toughness. The specially designed increased backlash (30% -50% larger than standard gears) ensures that edge contact is avoided during roll deflection.
Lubrication system: High end models are equipped with internal circulation forced thin oil lubrication (oil pressure 1.2-1.8 bar, flow rate 15L/min), which achieves full coverage lubrication of the tooth surface through centrifugal oil channels. Tests have shown that compared to grease lubrication, thin oil lubrication can reduce tooth wear by 60% and extend service life by 3-5 times.
Torque transmission mechanism
Main transmission path: Approximately 70% of the rated torque is transmitted through the normal force decomposition of the involute tooth profile
Auxiliary path: 30% of the torque is borne by the frictional force on the end face, and pre tightening force is applied using 12.9 grade alloy steel bolts
Configuration plan for hot rolling production line
Rough rolling unit: TG38 heavy-duty coupling (torque 19405kN · m) is selected, equipped with a double sealed thin oil lubrication system to adapt to ± 1.5 ° roll deflection
Precision rolling unit: using GIICLZ-3260 type (torque 6000kN · m), integrated phase adjustment module, dynamically compensating for rolling force fluctuations
Winder drive: matched with GCLD-580 type (torque 3150kN · m), specially designed for quick disassembly structure, reducing replacement time to 2 hours
Over the years, with excellent quality, we have been continuously providing many coupling products of various categories and uses complying with multiple standards and a full range of services, from the product selection to final installation and operation, for the industry fields of ferrous metallurgy, nuclear power, gas turbine, wind power, ropeway construction, lifting transportation, general equipment, etc. We strictly comply with quality system requirements and implement the whole process control to become a reliable and trustworthy partner of customers.
URL: https://m.rokee.com/coupling-cases/initial-rolling-gear-couplings-for-large-hot-rolling-mill.html