Not to be dismissed is the friction drive which for two. 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. Jan 07, 2018 check where to position a dial gauge to measure radial runout of a girth gear, hope this helps, thanks for viewing. A practical guide to shaft alignment plant services. Home crusher plantsequipment for measuring girth gear.
Hi we have replaced the girth gear of a ball mill used for coke grinding, and we have completed gear alignment. Girth gear industrial girth gear and kiln girth gears. We are engaged in manufacturing and supplying girth gear, industrial girth gear, kiln girth gears. A girth gear is divided into 816 segments, which are joined by bolts. This division at to ensure alignment and runout integrity. The top countries of suppliers are china, india, and pakistan, from which the percentage of girth gear supply is 94%, 4%, and 1% respectively. What are the insandouts of quality inspection of girth gears, from both a. There are 832 suppliers who sells girth gear on, mainly located in asia. 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. Figure 5 traditional girth, pinion planetary gearbox kiln drive a recent installation for a 2500 mtd clinker plant uses a 2 pier support design kiln having a diameter of. 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 pyro processing applications.
Ball mill girth gear and pinion alignment cr4 discussion thread. The pinions are new but the girth gear is refurbished with two or three hand ground areas. After instal lation, the teeth of a girth gear of 7. Industrial gear units, segmented girth gear seweurodrive. 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. Usually fitted to the outside of horizontal mills, rotary mills and kilns, girth gears provide the systems primary rotational drive and as such need to be robust, efficient and built to. As a guideline for the alignment of large girth gear drives, the. Recognize different gearing systems and relative advantages and disadvantages between them. 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. Bogipinion casing independent from girth gear casing for self alignment and permanently good positioning onto girth gear. Understand gear trains and how to calculate ratios.
Selfalignment of the output pinions ensures full tooth contact to the girth gear and adapts to movements and runouts. The flexible concept from seweurodrive has simplified manufacturing, transport and assembly. Girth gears are used to drive large, rotating systems such as dryers, rotary kilns or horizontal mills. The gear tooth is a component of a mechanical power transmission system that does not lack for descriptive terminology. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any sizereduction requirements including, equipment for measuring girth gear runout, quarry, aggregate, and different kinds of minerals. Mill and kiln gears 3 david brown mill and kiln gears rev.
They may be used in all spur or helical girth gear drives, irrespective of the subsequent lubrication method. Girth gears more than just metal and teeth gear technology. Industrial gear units girth gear series girth gears are used to drive large, rotating systems such as dryers, rotary kilns or horizontal mills. Dec 28, 2017 have you ever seen a kiln girth gear with 14 jointscheck it out here in this video. Rubber seals of neck shoe bearings and girth gear cover. Girth gears for critical applications 02 03 girth gears are used in a number of the worlds critical industries, including mining, cement and minerals. The tooth engagement exerts forces detrimental to the mill. Thyssenkrupp industrial solutions selects the appropriate drive variant for the specific application requirements. 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. Gear oils based on polyalphaolefin pao and synthetic hydrocarbon. The hertz contact pressure will be uniformized and, therefore, be minimized allong the complete tooth. So, the quality requirements during the actual production for the big gear ring are very high. 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.
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. Alignment surface, horizontal alignment surface, vertical these symbols indicate the oillevel checking procedure using the oil dipstick. A girth gear can be assembled to a drum with a flanged connection or with spring elements. A s well a3 delicate alignment problems, tendency to mill position shift and impairment of running.
Joint faces on the gear rim below the tooth root are not a close fit and alignment of each joint is effected by an axial dowel. If your girth gear cannot be repaired at site, our proposals team will strive to minimise the costs associated with removing your girth gear from its application. The 2 contacting surfaces or gear meshing between pinion and girth gear will permanently adapt to each other. Check where to position a dial gauge to measure radial runout of a girth gear, hope this helps, thanks for viewing. Never run out of space for all your photos, videos, and files with for the price but 57. Self alignment of the output pinions ensures full tooth contact to the girth gear and adapts to movements and runouts. The dmg2 gear units cover the entire power range from 1,200 to 10,000 kw in standalone operation and up to 20,000 kw with the use of a dual drive. Cm1 girth gear report gear mechanical engineering scribd. Meshing of the kiln girth gear depends on the thermal condition of the kiln. However, for this to work your gears must offer increased service life. Ball mill girth gear and pinion alignment cr4 discussion. 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.
Ball mill girth gear and pinion alignment 08272011 2. The only available option for lessening the impact of high cost gearing is to stretch your amortization. Possible areas of application for gear units of this series are mainly the cement and oreprocessing industries. This study is focused on predicting the fatigue life expectancy of girth gear pinion assembly used in cement industries. The gear unit is designed only for the application specified in section 1, technical data. Gear alignment is the most important technical procedure for optimum operation of two gears in mesh. Rscs dedicated professional field staff delivers emergency onsite services 7 days a week, 24 hours a day for minor repairs and for complete gear replacement. In most cases, the mechanical accuracy of the gear blank is taken for granted and, after all, preparing a gear blank normally consists of.
January 2010 spring plates girth gear bogipinion kgd reaction arm cardan shaft. Product introduction 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. Possible areas of application for gear units of this series are particularly the cement and ore processing industries. Open gear drives do the heaviest krupp polysius ag work in many branches of industry. Equipment for measuring girth gear runout products. 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. For gear run out measurements, never place sensors on the side where the teeth are engaging.
A wide variety of girth gear options are available to you, such as steel, stainless steel, and iron. Run out measurement of girth gears on rotary kilns, rotary dryers and ball mills. Girth gears with durable, heavyduty performance flsmidth. It is polysius kiln and girth gear is mounted over shell with welded u clamps and supporting clits, it has been fixed with 8. Request pdf the selection and application of lubricants for rotary kiln girth gears and pinions the lubrication of rotary kiln girth gearing presents a unique. Have you ever seen a kiln girth gear with 14 jointscheck it out here in this video. Rotating girth gear using alignment fixtures duration. Careful alignment of the girth gear and of the transmission gear is of critical impor. The flender girth gear unit described in these instructions has been designed for driving a tubular mill. Alignment in gearing i by geometer shafts driven one from another by gearing may be disposed parallel, at an angle or cross wiseaccording to the type of gearing employedand satisfactory operation can often depend as much on alignment of the gears on the shafts, as on the spacing of these or on precision in the gear teeth profiles. Guide values for adjustment and assembly the commission engineer of open gear drives is faced with toughest requirements when aligning or correcting the drive. Girth gears made of handy, easytoinstall segments for driving large, rotating systems. The selection and application of lubricants for rotary kiln girth. Rotary service company rsc is the company of choice for kiln girth gears.
Flender gear units girth gear unit for tubular mills dmg2 sizes 18, 22, 25. Gear design objectives understand basic principles of gearing. Laser alignment is an essential component of a viable maintenance. The flender girth gear unit described in these instructions is designed for driving a tube mill. The gear unit is designed only for the application specified. Great wall steel casting has large production capability in steel castings, so we can provide girth gear with short cast period and large amount.
Gear unit that perfectly fits your ball mill flsmidth. The symmetrical casing of our lgdx gear unit is made of ductile cast iron and divided into four sections, with every part of the gear unit manufactured to a high standard. Priming lubricants are products containing a high percentage of additives and are applied prior to the initial operation of gear drives. Gear design and modeling was carried out using a cad package and analysis. What are the insandouts of quality inspection of girth gears, from both a manufacturer and buyer perspective. If you need large diameter girth gears in your process machinery, then you need a product you can rely on.
Combiflex, ring motor and direct drives are among the welltried and reliable highperformance systems. In addition to our manufacturing work, we provide field maintenance repair services for rotary parts. Your heavyduty processes need components that are up to the task and our maag gear girth gears deliver highperformance for your mill or kiln. Girth gear is the key component to support the transmission system stability of rotary kiln and ball mill. Gear and pinion alignment our most recent inquiry from alan in the asiapacific region. Idmdrivers runtime engine from national instruments file name. In addition to the very slow operating speeds, there are significant thermal, alignment, and cleanliness issues that need to be addressed. Terms and definitions of an open gear girth gears are manufactured from segments.
Worldwide, over 400 of these large gear units have already been deployed successfully. We differ from other rotary kiln and ball mill companies through our extensive knowledge, experience and customer relationship in rotary and ball mill repairs. The selection and application of lubricants for rotary kiln girth gears. The gear unit is designed only for the application specified in the section 1. Understand geometry of different gears and their dimensional pro perties. A girth gear can be single or double pinion driven. Utilising more than 150 years of global gear engineering expertise, we.