Two general classifications of gearing are used for ball mill drives. We are the best ball mill suppliers and manufacturers of ball mill, close circuits ball mill, open. Unusual noises were also reported from the machine. Repairs entail extra work for girth gear dismantling. Mill and kiln gears are usually rated in accordance with the appropriate agma standard, although. This article focuses on ball and rod mills excluding sag and ag mills.
With more than girth gears sold over the world citicic gear is a leading supplier in the cement and mineral industry. Buy right angle worm gear speed reducers direct from motion industries. The company had a spare mill on hand, but due to operational demands and a foundation crack, they were unable to install the new gearset until 10 to 12 months later. The 2 contacting surfaces or gear meshing between pinion and girth gear will. This compact solution utilizes the full load capacity of the valuable girth ring while providing maximum usability and. Manufacturers and suppliers of girth gears, large gears, industrial girth gears, industrial gears, precision girth gears, cement plant girth gears, steel girth gears, girth gear, spur girth gear, helical girth gear, double helical girth gear, bronze girth gear from ashhoka engineering exports a unit of ashoka machine tools international private limited, new delhi, india. The inching drive, also known as a barring or auxiliary drive, is an important.
Girth gear is a rotary kiln, mill main transmission parts and other equipment, mainly driven by the motor pinion drive, pinion drive mounted on the barrel of a large gear, so that the mill drive, large gear and the barrel cooperation. Nov 03, 2015 the repair left the mill shell distorted, which caused the axial and radial runouts to fall outside of the recommended values. A s well a3 delicate alignment problems, tendency to mill position shift and impairment of running. Girth gear is an important transmission part of rotary kiln and ball mill equipment. For example, if the wheel gear has 60 teeth and the worm gear has 1 tooth, then the velocity ratio is 160 1. Ball mill close circuits ball mill and open circuits. Some consultants have the view that the gear drive is limited in power. Ball mill girth gear and pinion alignment cr4 discussion thread.
The rotation is through the ball mill motor driven pinion gear shift operation, the material in the feed gradually into the hollow. Pin measurement provides an accurate and convenient method of determining tooth thickness of a gear of any diameter within the capacity of the available micrometers. The raw meal is grinded into fine powder by the motion and squeezing of steel balls. Boston gear g1217 grooved pulley, fits round belts 0. Video of the processes to manufacture a girth gear completely inhouse.
One side drive provides a power range up to approximately 8,000 kw when engaged with the girth gear of your ball mill. Damage to mill cylinder cannot endanger gear teeth. It is only natural that this kind of force subjects the gear wheels to very high stresses. One of the latest cutting edge, innovative and pioneering technologies is onsite girth gear machining using the fcb novagear.
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. There are differences in the gear blank shapes between the two systems. Grinding mills, girth gears, pinions mill shells, mill. Surya engineering works offering surya engineering works stage wise ball mill girth gear at rs 500000unit in new delhi. Great wall steel casting has large production capability in steel castings, so we can provide girth gear with short cast period and large amount. The girth gear is connected to the cylinder shell by bolt. These adjustment features are utilized to compensate for normal stackup of con forming geometric errors on the multi component grinding mill assembly. 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. Monroe has a large variety of speed ball handles made out of ductile iron castings. Ball mill girth gear installation pdfsand making machine is the most widely used equipment in artificial sandball mill girth gear pinion alignment, filetype pdf. For larger diameter gears a span measurement or gear tooth.
The boston gear molded delrin polyoxymethylene with brass inserts spur gear with 20degree pressure angle pa and a diametral pitch dp of 24 transmits torque between parallel shafts to provide rotational power to another part of a motorized system. A dial gauge e is placed at the midpoint of girth gear tooth width. Therefore, the ball mill girth gear and pinion materials are required to have sufficient strength, high wear resistance and good processing performance. Girth gear is the key component to support the transmission system stability of rotary kiln and ball mill. Girth gear industrial girth gear and kiln girth gears. What is the ball mill gear material crusher mills, cone. 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. It is a basic dimension from which many other features of. Kedar rubber mill rubber liners manufacturer in india. Gear mesh misalignment may result in shifts in the load distribution of a gear pair that results in increasing contact and bending stresses, moving the peak bending stresses to the edge of the face width, and might also increase gear noise. Needless to say, they mate only with gears of the same module and number of teeth.
Spur gears these are generally furnished on the smaller diameter mills using vbelt drives or reducer drives. Common types of grinding mills include ball mills and rod mills. The tooth engagement exerts forces detrimental to the mill. Gear milling standard inserts gear milling tailormade inserts u style 3 cutting edges see page 7 see page 17 ut style 1 cutting edge tailormade inserts for gear, spline and rack gear milling tool range end mill shell mill disc mill solid carbide din 3972 basic profile u style 3 cutting edges see page 6. Globals thirdparty gear engineering team specializes in girth gear reliability and failure analysis consulting for gear driven mills. Crossed by drawing and stay out allowance, alignment, connection, processing both. Gear for mill, girth gear, spare parts manufacturer supplier in china, offering girth gear for ball mill, helical gear, e. Long term solution with high quality girth gear and pinion from vulcan is. Gear cases machined from rigid housings to ensure optimum shaft alignment, reduced noise and dynamic deflections. Open gear drives are very common in the raw materials industry. The destruction of the edgedrive ball mill gear and pinion is mainly due to the wear and bending of the tooth surface.
Fat line precision golf ball alignment tool sink more putts, hit more fairways and save strokes. So customer requirements for large ring gear is very high and strict. Ball mill close circuits ball mill and open circuits ball mill. Manufacturer of machinery girth gear mill girth gears, cement mill girth gear offered by stotz gears pvt. Ball bearing inserts sb 200 pti series csb 200 pti series normal duty set screw lock metric and inch bores. Boston gear manufactures gears, gear drives, bearings, valves, shaft collars, couplings, and other power and fluid transmission components. We pride ourselves on being able to provide realistic and site specific rcm based maintenance plans and solutions for risk improvement, critical asset reliability and up time. 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. The blanks are not finished and tapped and reamed are drilled and faced.
For gear run out measurements, never place sensors on the side where the teeth are engaging. Kumera active drive will correct the alignment of the pinion and backlash can be. We are engaged in manufacturing and supplying girth gear, industrial girth gear, kiln girth gears. Mill girth gears, ring gears, bull gears, pinions and shafts. The traditional method of inspecting a gear for correct size is the measurement over pins or balls with a micrometer. Girth gear for ball mill spare parts buy girth gear,ball. The girth gear drives that are used in tube mills, coolers, washing drums, kilns, calciners and other machines have to transmit enormous torques i. Ball mill girth gear and pinion alignment cr4 discussion. Girth gear is the key part grinding mill, gearx engaged in manufacturing and supplying girth gear. Mill drive gearboxes are designed to complement the girth gear to deliver cost effectiveness across the entire system. Refer to figure 2 for a schematic of the mill drive system. The velocity ratio of a wormandspur gears is easily calculated because the worm has only one tooth. 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. Kiln girth gear manufacturer from china symmen metal.
Damage to mill cylinder, neck or stub endanger girth gear and pinion. Successful gear systems often depend as much on selecting the right gear for the job as on the proper design of the individual parts. 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. Metallurgical contentball mill maintenance manualon mill installation and maintenanceball mill concrete foundationsgrinding mill foundationgroutingball mill sole plate am sure your ball mill is considered the finest possible grinding mill available. Girth gears more than just metal and teeth steve lovell introduction the clear majority of published knowledge about gear manufacturing relates to two main subjects. In the table below, we illustrate the differences in various angles and dimensions for typical straight bevel gear pairs. Kedar rubber is one of the leading manufacturer and exporter of rubber liner and mill rubber liners in ahmedabad, gujarat and india. The company, founded in 1877, is headquartered in charlotte, nc, and meets international organization for standardization iso standard 9001. An elementary guide to gear inspection gear solutions. Ball mill repairs gears without downtime kluber usa. Gear unit that perfectly fits your ball mill flsmidth. Ball mill is an efficient tool for grinding many materials into fine powder. Apart from loads and speeds, interface dimensions and site specific conditions are also needed. With continuous efforts on process optimization on the basis of rich manufacturing experience and advanced equipment, chaeng is able to offer high quality cast steel girth gears according to users drawings and requirements.
Surya engineering works stage wise ball mill girth gear, rs. Over the 30 years of experience in gear manufacturing industries, pushpak has come to know as eminent manufacturer and supplier of gigantic gears and its applications, pushpaks high reliability girth gears are used to drive horizontal ball mills sag mills and are designed for ultimate strength and reliability in service. Intelligent gearing systemsolution to understand and. Automobile industry business machinery industry product information milling machines machine tools tool industry. Download as xlsx, pdf, txt or read online from scribd. After being crushed, the raw meal enters the raw material mill.
The wear maintenance approach of rotating tubes driveline this document is the sole property of novexa and must not be copied, issued or reproduced without authorisation 1 average shutdown period reduction days strategy preventive approach development business on site machining specialist headquarters. The optimal ball diameter in a mill 333 the grinding efficiency of the narrow particle size fractions with ball charge of various diameters has been observed through the constant of milling rate k in the equation of the grinding kinetics law for the first order grinding rr 0. Hi we have replaced the girth gear of a ball mill used for coke grinding, and we have completed gear alignment. 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. Boston gear ypb2416 spur gear, molded delrin with brass. Open gearing, girth gear, pinions harcliff mining services. In most cases, the mechanical accuracy of the gear blank is taken for granted and, after all, preparing a gear blank normally consists of. The gear tooth is a component of a mechanical power transmission system that does not lack for descriptive terminology. How to choose suitable ball mill girth gear and pinion. Cutting edge technology onsite machining of girth gears. The mill drive system consists of the main mill motor, the main reduction gear box, mill pinion and girth gear. Girth gear,rotary kiln girth gear,ball mill girth gear.
Girth gear reliability and failure analysis global. If you need large diameter girth gears in your process machinery, then you need a product you can rely on. Gear misalignment makes the natural rotation of the gears more difficult since they must fight their way through an area where the gear teeth are misaligned. Machinery girth gear mill girth gears manufacturer from. The motor drives the pinion and pinion drives the girth gear mounted on the cylinder shell, because of this, the ball mill start driving. Set screw type with snap ring and groove dimension bearing shaft dia. Uherek this paper outlines the design considerations that go into construction of a drive system in order to explain the importance of specific data, why it is required, and where design freedom is necessary. The capital cost of girth gears is lower than others and they take less time to install. Photographs of a glass ended laboratory ball mill show action of ball mass within the mill. The pitch circle is a circle on the face of a gear that passes through points that are radially half way up the working depth of the teeth.
Gear mesh misalignment gear solutions magazine your. Gears can be made in a wide variety of forms, each with its own strengths and weaknesses. This includes all rotating mills with heavy grinding media loads. With these gears developed for achieving superior finish strength and process reliability, these can be designed for different kw applications as well as in diameter and weight choices. The fft turns this phenomenon into amplitude peaks at. Mill barring gear and braking system barring gear model with motor baseplate and braking system for ball mills request quotation. The micrometer pointer is to be vertically measured to measure the radial runout of girth gear. 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. Black grease was noticed at the couplingend pillow block bearing as well as a loose bearing nut. Agma 6014 mill gearing astm e2905 technical contact agma 9005 industrial gear lubrication agma 6014 mill gearing agma 919 condition monitoring girth gear engineering condition assessment for machinery reliability, and asset optimization.
As such you will find it is designed and constructed according to heavy duty specifications. Item in stock at a motion fulfillment center and qualifies to ship out same day of order placed by 5. Gear theory boston gear rack and pinion catalog1 schlenkent. Helical gearing may be either of the single helical or double helical herringbone design. 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. High mill vibrations due to poor quality of girth gear or pinion will results in more maintenance cost. Concern was expressed over the gearbox and ball mill at a power plant. 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. We are engaged in manufacturing and supplying ball mill, close circuits ball mill, open circuits ball mill, girth gear ball mill, ball mill for cement grinding, pinion drive ball mill, central drive ball mill, integral drive ball mill, slide shoe bearing ball mill, trunnion bearing ball mill. Obviously, if we can normally 14 gear technology fig. The raw material mill manufactured by great wall machinery can meet the raw material supply of 2502500td cement production line. Lateral drive alignment ball mill crusher mills, cone. Cm1 girth gear report gear mechanical engineering free 30. Although their concepts are very similar, they are not discussed here.
In order to choose suitable ball mill girth gear and pinion, you must make sure the materials. Spur gears and pinions are cut with teeth of the full depth involute tooth. Girth gear applications girth gears fall into two basic categories. In the conical mill, the largest balls being kept at the greatest diameter in the cone by centrifugal force, have greater height of fall and greater peripheral speed than the smaller balls which are found at the smallest diameter in the mill. Introduction to gear design chapter 2 what kind of gears should i use. Proper alignment is the largest factor in determining the life of bearings, seals and couplings. The overall life of these gears depends upon proper lubrication and alignment. Kumera active drive girth gear ensures optimal load distribution on girth gear teeth. Gear cutting of a split girth gear for a cement mill having an input power of 2200 hp 5.
Girth gear pinion alignment filetype pdf marcopolosenago. Gearx supply grinding mill girth gear according to customers demand around the globe. This manual needs to be available for use during installation of the girth gearing supplied. Mr craig denecki falk milwaukee in his paper, presented at the 1996 sag mill conference, provided details of the then largest gear drive in operation on a sag mill 34ft x 18ft at escondida. Dickinson group of companies is a representative fives cement and minerals technologies in southern and east africa. And as member of agma american gear manufacturers association, we do actively take part in defining the standard for gear rating calculations and service factors. Ball mill girth gear and pinion alignment 08272011 2. This gear reducer is most suitable for driving a cement raw mill a clinker mill, a coal mill, and a slag mill, etc we are one of the worlds leading companies for a gear reducer of a mill and have supplied more than 500 sets to worlds customers which are highly evaluated. Girth gears more than just metal and teeth gear technology. Get best price and read about company and get contact details and address. Loss of initial life due to poor quality of girth gear or pinion means less overall life of the mill. Central or girth gear drive for ball mills 1 scribd. Cr4 allows you to subscribe to a discussion so that you can be notified of new comments to. The causes a momentary binding slowing of the rotation.
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