Two pinion girth gear drive Fig. 2A 1 Annulus, 2 pinions 2 Reducing gears, each 2 stage 2 Main motors 2 Turning gears Project B Central drive Fig. 2B Elastic mill sag by weight of mill balls and materia to grind A After temporary alignment of the teeth of pinion and girth gear with the
Jun 05, 20130183;32;These drive systems are based on ABB's ACS drives family and offer the following benefits and possibilities smooth starting, fast and precise control, reduced mechanical stress on the ring gear
alignment of the girth gear. Two SAG mills with rigid pinion drives. SAG mill with DOUBLE COMBIFLEX174; drive. 7 the motor and which have to be accepted by the mill structure. xThe hydraulic jack incorpo rated into the slide shoe support enables easy centring of motor stator and motor
Sag Mill Drives Girth Gears At 18 000 Hp Motors. Sag mill drives girth gears at 18000.Hpall mill girth gear alignment akms.Major projects sag mill drives girth gears at 18000 hp.Operation and performancehis paper was originally presented at the.Vancouver sag mill conference in 1996educing the fatigue.Life of a girth gear.
for pinion drives; girth gear, pinion, bearings, gear boxes (optionally) and motors require a precise alignment measures, e.g. inspections of the SAG mill. This avoids fixed speed pinion drives have to be stopped with a prior grinding out / drain out process before interruption and
Aug 28, 20110183;32;Re Ball Mill Girth Gear and Pinion Alignment 08/27/2011 207 AM pinion alighnment is done by coating the pinion with a lead based grease. after rotating the drum, the grease marks will show the contact area. the pinion should contact the girth quot;ringquot; near the center of the gears.
Among the different types of horizontal mills used in the mining industry, SAG, AG, rod and ball mills are usually equipped with lateral drives. We offer you a full package of complete drive systems, consisting of girth gears for single or dual drive pinions, main gear units and auxiliary drives.
Gear india is one of the top manufacturer,Supplier and exporter of industrial gears, segment gears, bearing housing for pinion shaft, bearing housing for support rollers, segment gears, girth gears, mill
The mill drive system consists of the main mill motor, the main reduction gear box, mill pinion and girth gear. The mill is also equipped with a barring drive which is either connected to the main drive reduction unit or alternatively mounted at the back of the main motor. Refer to Figure 2 for a schematic of the mill drive
David Brown delivered a girth gear weighing more than 65,000 kilograms to FL Minerals for a mining operation in Zangezour, Armenia. The original order was delivered in early 2008, and the company is currently working on a second girth gear order for 2009. The single helical SAG mill girth gear, which is cast in four pieces, has
The autogenous grinding mill (AG mill) and semi autogenous grinding mill (SAG mill) are two grinding equipment with crushing and grinding functions, which are mainly used in mineral processing industry CHAENG (Xinxiang Great Wall Steel Casting) with rich experience in manufacturing grinding mill girth gear according to users drawings, can provide high quality AG mill and SAG mill girth gear
2 QdX4 Mill Drivesystem QdX4TM Mill Drive system 3 7 MW 7 MW 14 MW 28 MW 7 MW 4 MW 7 MW 7 MW 7 MW 4 MW 7 MW 7 MW SAG mill 32 ft. single drive The natural progression in gear/pinion mill drives The QdX4TM Mill Drive provides the next step in the evolution of change in mill drive architecture,
Tamarack Consultants engineers are experts in the engineering, design, manufacture, installation, and maintenance of large girth gear systems. With industry specific knowledge and experience working with some of the worlds largest ball/AG/SAG mill drives, and kiln/dryer transmissions driven by gears over 40 feet in diameter.
Mill Components; Open Gearing. Girth Gears; Pinions; Industrial Gearboxes. Gearbox Rebuilds; Ball Mills SAG Mills AG Mills Rod Mills. Mill Components. Girth Gears amp; Pinions; Mill Shells; Sole Plates; Trommels; Shell amp; Head Liners; Trunnion Ends; Mill Gear Drives amp; Barring Drives; Feed Hoppers; Lubrication Sets; Coupling Sets
2 d4 TM Mill Drivesystem 7 MW 7 MW 14 MW 28 MW 7 MW 4 MW 7 MW 7 MW 7 MW 4 MW 7 MW 7 MW SAG mill 32 ft. single drive The natural progression in gear/pinion mill drives The QdX4TM Mill Drive provides the next step in the evolution of change in mill drive architecture, while allowing the system to be built with components that are within current manufacturing capabilities.
Girth Gear Applications Girth gears fall into two basic categories; flange mounted and tangential spring mounted. Flange mounted girth gears, the more common of the two, are most frequently utilized in cold processing equipment such as SAG (semi autogenous grinding) mills and ball mills for use in the mining and cement industries.
As the dimensions of such gears can be huge, it is often difficult to protect the gear teeth effectively against external media. In contrast to enclosed gears, dirt, abrasive cement and coal dust and salt water may enter the open drives, accelerating wear and corrosion. Additionally, girth gear drives are subject to heavy shock loads.
Both the SAG mill and ball mill are each driven by two gear units. Because, on a conventional drive variant, only one engagement per pinion with the girth gear is possible per side, an economic power limit of about 8 MW per drive is in effect. With the DMG2 gear units, Siemens said this limit expands to as much as 12 MW per drive.
We can provide all elements of a mill drive system as a fully optimised solution to suit your process exactly, or individual components as required. Mill drive gearboxes Girth gears Pinions Couplings. Designed to deliver exceptional levels of performance and value, David Brown Santasalo ball mill drives are optimised for primary
Girth gears (Gear wheels) are large ring gears which are normally fitted to the outside of ball mills or rotary kilns to provide the primary rotational drive,which is required to be operated in a long time So, the quality requirements during the actual production for the big gear ring are very high Girth gears are applied in the mining, cement, minerals industries used in various types of
In a ring gear (or girth gear) drive, Located at Kennecott Utah Copper near Salt Lake, this mill uses a ring motor drive, Figure 5. The SAG mill is followed by two 20 ft diam., 7,500 hp gear
The girth gear drives that are used in tube mills, coolers, washing drums, kilns, calciners and other machines have to transmit enor mous torques i.e. often up to 50,000 Nm. It is only natural that this kind of force subjects the gear wheels to very high stresses. Such gears are usually designed as spur or helical gears with
Due to the low speed nature of the drive train, a torque limiting coupling is fitted to protect pinion and girth gear from eventual transient torques. As a result, the air clutch that previously transferred the drive power to the mill can be removed, eliminating all air clutch related outages and maintenance activities.
Two general classifications of gearing are used for ball Mill drives. These are the spur gear and the helical gear. Helical gearing may be either of the single helical or double helical (Herringbone) design. SPUR GEARS These are generally furnished on the smaller diameter mills using V belt drives or reducer drives. Spur gears and pinions are
Our GMD eliminates all mechanical components of a conventional mill drive system, such as ring gear, pinion, gearbox, coupling, motor shaft and motor bearings By mounting the rotor poles directly onto the mill, the mill itself becomes the rotor of the gearless motor.