Large Size Herringbone Girth Gear Castings and Forgings for Mining Ball Mill and Conveyor
1.Herringbone Gear Introduction | Castings and Forgings
Helical gears generate axial thrust on the shaft during operation. This axial force increases bearing load and accelerates wear of transmission components. To eliminate this force, a gear is designed with two sets of helical teeth in symmetrical and opposite directions. It looks like the Chinese character "人", hence the name herringbone gear, also known as double helical gear.
Herringbone gears have a complex structure and relatively complicated machining process. They can be manufactured by the generating method. However, hobbing has limitations and cannot process all types of herringbone gears. Milling is commonly adopted for large-size herringbone gears with high machining difficulty. We support custom production of castings and forgings, suitable for heavy-load, high-impact and continuous-operation mining working conditions.
2. Technical Specifications of Herringbone Gear Castings and Forgings
|
Item
|
Details
|
|
Module
|
10-45mm
|
|
Outer Diameter
|
100mm-12000mm
|
|
Pressure Angle
|
Standard 20°, 30° and non-standard available
|
|
Precision Grade
|
Grade 6 for OD less than 4mGrade 8 for OD more than 4m
|
|
Manufacturing Process
|
Casting, Forging, Welding
|
|
Common Materials
|
42CrMo, 20CrMnTi, 20CrNiMo, 17CrNiMo6, 45# steel and other alloy steels. Heat treatment such as carburizing quenching and normalizing can be provided according to working conditions.
|
3. Application Scenarios of Herringbone Gear Castings and Forgings
(1) Transmission Parts for Ball Mills
Widely used as girth gears and driving gears in the main transmission system of dry and wet ball mills in mineral processing plants and sand yards. Ball mills work under persistent ore impact load. The nearly zero axial thrust characteristic of herringbone gears protects main bearings and stabilizes grinding performance. They are core transmission spare parts for mineral grinding systems.
(2) Reduction Transmission Components for Mine Hoists
Matched with reducers of mine hoists for heavy-load transmission of ore, materials and personnel transport in vertical and inclined shafts. Mine hoisting equipment requires extremely high stability and safety for transmission. Herringbone gears run smoothly with low impact, effectively reducing vibration during start-up and stop, and ensuring safe operation of hoisting systems.
(3) Supporting Transmission Gears for Crushers
Suitable for gearboxes of cone crushers, jaw crushers and roller presses. Crushers face fluctuating feeding and strong instantaneous impact load. The multi-tooth simultaneous meshing advantage of herringbone gears can withstand sudden impacts, reduce tooth breakage failures and prolong continuous working time of crushing equipment.
(4) Reduction Components for Scraper Conveyors and Belt Conveyors
Applied to reduction units of long-distance mine scraper conveyors and large belt conveyors. Underground conveying equipment needs non-stop operation for long hours. The self-canceling axial force design cuts bearing wear and lowers maintenance frequency, perfect for narrow underground spaces with difficult maintenance.
(5) Spare Parts for Other Heavy-Duty Mining Equipment
Also applicable to rotary kilns, mine dryers, feeders and other heavy-duty mining supporting equipment. We provide non-standard custom service based on drawings or samples, and accept orders for large herringbone gear castings and forgings.
Castings and Forgings
Castings and Forgings
Castings and Forgings
Your message must be between 20-3,000 characters!
