It transfers the torque and speed from the mill motor to rotate the ball mill. For smaller gears a flexible probe like a piece of thick vinyl can conform to any gear shape required. These large coal crushing drive systems are usually rotated by motordriven gearing. Our factory advantages manual gear pumps of ball mill pdf. Lateral drive alignment ball mill crusher mills, cone. In progress part three rotating girth gear using alignment fixtures duration. Flange mounted gears rely, in large part, on the mill structure to provide the stiffness and geometric stability. The kiln girth gears are available mainly in bipart, four parts, 8 parts or multi segments as per the requirement and suitability with the application of gear. Re ball mill girth gear and pinion alignment 08272011 2 07 am pinion alighnment is done by coating the pinion with a lead based grease. With a variety of options for cast, fabricated steel or sg iron and multisegmented gears, david brown santasalo is your one stop shop for girth gears for ag, sag, ball mill, kiln and dryer applications. The femethod is utilized for deformation and stress calculation of a whole girth gear including the strength calculation of the fixing structure. This problem may not be identified during a cold alignment check. Make rotary kiln girth gear in the basically correct position, turn the kiln body, use dial indicator to measure the radial and endon jerk value. Ball mill pinion alignment pdf alianzcanineitaliait cr4 thread ball mill girth gear and pinion alignment re ball mill girth gear and pinion alignment 08272011 207 am pinion alighnment is done by coating the pinion with a lead based grease after rot.
A plate steel gear guard is furnished with the mill for safety in operation and to protect the gear and pinion from dirt or grit. Ball mill girth gear and pinion alignment cr4 discussion thread. As soon as the gear and pinion have been cleaned and coated with the proper lubricant, the gear guard should be assembled and set on its foundation. The pinion shaft failures usually occur as a result of a fatigue fracture, which originates from the corner of the keyway in the pinion shaft. Singlepinion and dualpinion fixedspeed gear drives offer. Ball mill close circuits ball mill and open circuits ball mill.
We can provide all elements of a mill drive system as a fully optimised solution to suit your process exactly, or individual mill drive gearboxes, girth gears, pinions and couplings as required. 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. The pinion and girth gears of two 9 mw ball mills exhibited severe scoring within five months of lubrication failure, torsional vibrations, alignment and gear. A complete range of gear and pinion sets, inspections, design, installation and alignment services to drive your mill s performance. Open gear drives are very common in the raw materials industry. This manual needs to be available for use during installation of the girth gearing supplied. Mill and kiln gears installation maintenance gear screw scribd. The girth gear driving pinion ends up getting aligned to the reducer, causing a misalignment issue between the girth gear teeth and the driving pinion teeth fig. Lewicki nasa ames research center summary in this paper, the authors show a detailed analysis of the vibration signal from the destructive testing of a spiral bevel gear and pinion pair containing seeded faults. This includes all rotating mills with heavy grinding media loads. Mill drive gearbox girth gear pinions barring drive auxiliary equipment including couplings, brakes, pedestal bearings and clutches whichever option you chose, be assured that your girth gear will be. What is the ball mill gear material crusher mills, cone. Shramdeep engineering offering ball mill girth gear. Denver ball mill tablas free download as pdf file pdf text file txt or read online for free be sure to list size and description of machines total length of the shell may colvist of several shell lengths flanged together to provide the desired mill length liners bearings gears and drives are similar to those standard on all.
The david brown standard is a maximum temperature difference deltat of 6 degrees celsius across the face width of the girth gear. Symetro gear unit the ideal central drive solution for your ball mills around the world more than 1 000 gear units are in operation some of them since more the eighty years spare parts for all gear units supplied since 1926 are still available based on our comprehensive documentation files the symetro gear. Detailed vibration analysis of pinion gear with time. Chaeng arranges lineation process several times, in order to make ensure the machining accuracy and position accuracy of girth gear. The raw meal is grinded into fine powder by the motion and squeezing of steel balls. How to choose suitable ball mill girth gear and pinion.
Cm1 girth gear report free download as excel spreadsheet. This article focuses on ball and rod mills excluding sag and ag mills. Shell deformation measurement on rotary kilns or ball mills with laser distance sensors. Repairs entail extra work for girth gear dismantling. By current standards, girth gears can be as large as 14 meters 46 feet in diameter, 1. Girth gears with durable, heavyduty performance flsmidth. As a guideline for the alignment of large girth gear drives, the. Get best price and read about company and get contact details and address. Department of machine design, kth, se100 44 stockholm. You can expect the same quality supported by decades of gearing and oem expertise. Girth gear is with super large diameter, the module is more than 10mm. The girth gear cracking usually initiates from a defect in the gear. Girth gears more than just metal and teeth gear technology. Girth ring gears if you need large diameter girth gears in your process machinery, then you need a product you can rely on.
This girth gear is widely demanded in different industries to be installed in different machines such as rotary kilns, rotary dryers and ball mills, girth gear for ball mill, girth gear for cement mill, girth gear for raw mill, girth gear for rod mill, gear for ball mill, gear for rod mill, gear. Chaeng ball mill girth gear in the grinding process of metal mines, ball mill plays an important and irreplaceable role, and the girth gear is rotating device of ball mill, playing a big role in long term stable operation of ball mill. Elastic mill sag by weight of mill balls and materia. Girth gears can be supplied individually, or as part of a fully optimised mdx mill drive package which includes. So, the quality requirements during the actual production for the big gear ring are very high. Phased array eddy current array testing provides 100% coverage of root and load face in one pass and ideally suited for mill and kiln girth gears testing with two probes able to cover most sizes. In order to maintain alignment of the girth gear and mill pinion, standard practice in the industry is to measure the temperature difference across the face width of the girth gear. If the ball mill would be equipped with fixed speed motors, then they will have to be washed out, isolated and stopped.
Mwl, department of vehicle engineering, kth, se100 44 stockholm. Damage to mill cylinder cannot endanger gear teeth. Raw material mill, also called raw meal mill, is important grinding equipment in cement production process. Pcm specialist in vibr, laser, gear alignment, condition based maintenance on mills. This can be an internal or and external surface defect. A ball mill consists of a hollow cylindrical shell rotati. The girth gear and pinions manufactured as our standard offering are governed by the specification under agma 60146114a06, published in 2006 this is. Normally i would treat the mill as the datum and align everything back to the motor as the last adjustment. Maintenance and replacement of rotary kiln girth gear. This compact solution utilizes the full load capacity of the valuable girth ring while providing maximum usability and. After temporary alignment of the teeth of pinion and girth gear with the mill empty, fig. It is attached to the girth gear and provides continuously the. What are the insandouts of quality inspection of girth gears, from both a.
Damage to mill cylinder, neck or stub endanger girth gear and pinion. Our symetro gear is a split torque central drive unit for ball mills. Mill drive gearboxes girth gears pinions couplings. Generally use gear root as alignment reference, and weld girth gear with spring plate through electric welding. We bring forth a highly advanced ball mill, specifically engineered for both wet as well as dry cement grinding applications. Gear unit that perfectly fits your ball mill flsmidth. Detailed vibration analysis of pinion gear with timefrequency methods marianne mosher, anna h. Pinion pittings in open girth gear pinion pittings in open girth gear rkarthik mechanical. Cr4thread ball mill girth gear and pinion alignment.
The rotation is through the ball mill motor driven pinion gear shift operation, the material in the feed gradually into the hollow. The gear unit with its integral selfaligning drive pinions forms a single unit together with the girth gear, sliding shoe bearing assembly, slide ring and axial guide. Its normally fixed in the outer sphere of the metal shell. Great wall castings big gears are applied in rotary kiln and ball mill of 5000 tpd cement production line in domestic famous cement enterprises, such as xinjiang tianshan building material group, henan mengdian group, etc.
Measurement tools for the cement industry mechanical condition monitoring on rotary kilns 15. The girth gear is the major component used in rotary kiln and ball grinding mill 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. Cement mill girth gear pinion alignment procedure pdf cr4 thread ball mill girth gear and pinion alignment 183 re ball mill girth gear and pinion alignment 08 27 2011 2 07 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. Gears and pinion for ball mill crusher mills, cone.
Such gears are usually designed as spur or helical gears with. In dual arrangement, with one gear unit on either side of the mill, our maag lgdx gear unit covers grinding applications up to 14,000 kw. Every combiflex drive is equipped with its own auxiliary drive unit. One side drive provides a power range up to approximately 8,000 kw when engaged with the girth gear of your ball mill. Senior design engineer maag gear ag rocco amato head of mill gear engineering maag gear ag. The girth gear drives that are used in tube mills, coolers, washing drums, kilns, calciners and other machines have to transmit enormous torques i.
The shim may span several bolts in sectors where the required thickness is substantially constant. Girth gear testing using advanced ndt phased array eddy. Cm1 girth gear report gear mechanical engineering free 30. It is only natural that this kind of force subjects the gear wheels to very high stresses. Industrial gear units, segmented girth gear seweurodrive. Maag gear symetro gear unit spare parts and accessories. Kumera active drive girth gear ensures optimal load distribution on girth gear teeth throughout the years of operation without a need for high accuracy alignment. Flangemounted 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.
New girth gears and drive pinions for two ball mills. Moving the pinion to achieve alignment to the gearbox will disturb the pinion to girth gear alignment. Common types of grinding mills include ball mills and rod mills. Your heavyduty processes need components that are up to the task and our maag gear girth gears deliver highperformance for your mill or kiln. Standard girth gear castings confirming to specified levels of mechanical properties covering hardness, tensile, yield and elongation is given in the table below. Metso is proud to announce the launch of our new rebranded offer. A ring gear may be fastened in one of several ways depending on the application, e. Highly resilient girth gears and pinions were used to modernize two ball mills. Girth gears mill pinion gear s the results of detailed investigations have indicated that fatigue failures have occurred in the majo rity of cases. Classified depending on the circuit design, bearing, grinding type and drive, the selection is made on the basis of the product fineness, quality, and nature of raw material, site conditions and specific requirements. Cement mill girth gear pinion alignment procedure pdf. Although their concepts are very similar, they are not discussed here. High vibrations on a ball mill amp maintenance forums. Mill and kiln gears method of mounting flange tangent plate or other max.
Unfortunately, to get what is required, this information needs translation into something that the gear. Gear cutting of a split girth gear for a cement mill having an input power of 2200 hp 5. The girth gear of ball mill is the major component used in rotary kiln and ball grinding mill which is required to be operated in a long time. Great wall steel casting has large production capability in steel castings, so we can provide girth gear with short cast period and large amount. Idmdrivers runtime engine from national instruments file name. Open gear drives of kilns and ball mills are often exposed to harsh operating conditions. Grinding ball mill girth gear root clearance cr4 discussion thread.
Girth gear industrial girth gear and kiln girth gears. Ball mill gear guard a plate steel gear guard is furnished with the mill for safety in operation and to protect the gear and pinion from dirt or grit. Pitch circle diameter of girth gear mm 70 60 50 40 30 20 10 0 1. Besides particle size reduction, ball mills are also widely used for mixing. We firmly perform our quality policy, we hold iso9001. Hi we have replaced the girth gear of a ball mill used for coke grinding, and we have completed gear alignment. The mill is driven by a girth gear bolted to the shell of.
Optimize girth gear based on the operation characteristics of the rotary kiln and ball mill, to ensure the stability of the girth gear during the long time operation and extend its service life. Industrial gear units girth gear series girth gears are used to drive large, rotating systems such as dryers, rotary kilns or horizontal mills. After being crushed, the raw meal enters the raw material mill. Jul 21, 2018 therefore, the ball mill girth gear and pinion materials are required to have sufficient strength, high wear resistance and good processing performance. The flexible concept from seweurodrive has simplified manufacturing, transport and assembly. This type is suitable for rotary kiln and ball mills as transmission gear. We are engaged in manufacturing and supplying girth gear, industrial girth gear, kiln girth gears. A typical application consists of a motordriven primary singlestage reducer that, through a flexible coupling, drives a large open pinion which in turn, meshes with a large ball mill ring girth gear that is attached directly to the ball mill. 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. Ball mill girth gear and pinion alignment 08272011 2. A ball mill is a type of grinder used to grind, blend and sometimes for mixing of materials for use in mineral dressing processes, paints, pyrotechnics, ceramics and selective laser sintering.
1274 1143 40 237 756 545 518 608 283 921 198 749 1577 1414 907 1419 624 381 527 1156 895 395 1200 1175 781 465 77 845 691 205 1058 972 226 327