Views
6 months ago

MDA Technologies 3/2014

MDA Technologies 3/2014

Machine Elements 02 FAG

Machine Elements 02 FAG X-life tapered roller bearings: Power loss was reduced considerably thanks to optimized contact geometry elastohydrodynamic lubricating film to be formed more rapidly, which reduces wear and temperature development. The design characteristics mentioned above not only save on fuel, but also slow down lubricant aging. The improved rolling contact surfaces and the use of high-quality materials increase the dynamic load-carrying capacity by up to 20 %. This makes it possible to extend the operating life by 70 %. Downsizing of gearbox designs while maintaining or even increasing performance capacity, can result in considerable advantages with regard to cost and competitiveness. Reengineered contact geometry between the roller and raceway, called profiling, counteracts harmful edge pressure and plastification in the rolling contact caused by impact loads or major shaft tilting under full loads (such as when tilling), preventing premature bearing failure and thus machine failure. Consequently, FAG X-life tapered roller bearings increase gearbox efficiency, longevity, and reliability in mobile work machines, thereby making a significant contribution in lowering lifecycle costs. 03 FAG tandem angular contact ball bearings are comparable to roller bearings with regard to their load-carrying capacity and installation space An alternative to tapered roller bearings The load-carrying capacity and installation space of FAG tandem angular contact ball bearings from Schaeffler are comparable to those of roller bearings, thanks to the integration of two perfectly balanced rows of balls. By adjusting the ball size, the clearance between the rows, and the contact angle, it is possible to make adjustments that are ideal for axial and radial operating loads. Unlike the line contact of the roller bearing, the point contact between the ball and the raceways considerably reduces power loss inside the bearing under most operating conditions. In the tandem angular contact ball bearing, the lubricant is subjected to less thermal and mechanical strain, which can lengthen the intervals for changing the lubrication fluid. Since the gearbox temperature is lower, lubricants with a lesser temperature spread can be 26 MDA Technologies 3/2014

Machine Elements used that have optimized properties for the smaller temperature range involved. By using more suitable oils, the lubrication film between metallic surfaces in the bearings as well as in the tooth contacts can arise more rapidly, thereby preventing wear. No bearing preload losses caused by wear, which occur with tapered roller bearings, are to be expected. Setting the operating clearance of the individual bearing rows as mentioned at the beginning enables the bearing to be adjusted directly to the operating conditions of the customer’s application. For pinion shaft bearing support, all bearing rows are operated in the preload range – to attain the required rigidity on the one hand, and an optimum operating life for the bearings on the other. In addition, the point contact has a cushioning effect in the drive train due to its greater elasticity. With regard to friction, there is a considerable advantage if the pinion shaft spins at maximum tractor speed (up to 4500 rpm) in transport operation, since there is no sliding contact between the roller and rib as occurs in tapered roller bearings. Tandem angular contact ball bearings can therefore offer an efficient and dependable alternative to tapered roller bearings in mobile work machine gearboxes and have already proven themselves in numerous applications, including the automobile industry. Conclusion Schaeffler’s wide product range offers numerous alternative solutions for the diverse range of demands for mobile work machines in agriculture. Depending on the specific application conditions, FAG X-life tapered roller bearings and FAG tandem angular contact ball bearings provide technical and economically optimized solutions that are designed by Schaeffler using the very latest calculation tools and application-specific technological expertise to meet every demand. Whether for cultivation at walking speed, rapid road travel for performing logistical tasks, or operating a wide variety of implements in the partial 04 Both FAG X-life tapered roller bearings and FAG tandem angular contact ball bearings demonstrate good performance when it comes to power loss inside the bearing 05 FAG tandem angular contact ball bearings: With regard to friction, there is a considerable advantage if the pinion shaft spins at maximum tractor speed (up to 4500 rpm) in transport operation and full load range: Modern bearing support components play an important role not only in satisfying application demands, but also in maintaining statutory provisions for pollutant emissions (Tier IV), ensuring economical operation management and low lifecycle costs, and especially in achieving high machine reliability and thus availability. www.schaeffler.com About Company name: Schaeffler Technologies Brands: INA, LuK and FAG Headquarters: Herzogenaurach, Germany Turnover: € 11,2 bn (2013) Employees: over 79,000 worldwide Products: Rolling bearing and plain bearing solutions, linear and direct drive technology, as well as high-precision products for the automotive industry MDA Technologies 3/2014 27

E-PAPER KIOSK:

WORLD OF INDUSTRIES - MOTION, DRIVE & AUTOMATION 1/2017
WORLD OF INDUSTRIES - MOTION, DRIVE & AUTOMATION 2/2017
WORLD OF INDUSTRIES - MOTION, DRIVE & AUTOMATION 3/2017
WORLD OF INDUSTRIES - MOTION, DRIVE & AUTOMATION 4/2017
WORLD OF INDUSTRIES - MOTION, DRIVE & AUTOMATION 5/2017
Automation Technologies 1/2016
Automation Technologies 2/2014
Automation Technologies 2/2015
Automation Technologies 2/2016
Automation Technologies 3/2014
Automation Technologies 3/2015
Automation Technologies 3/2016
Automation Technologies 4/2014
Automation Technologies 4/2015
Automation Technologies 4/2016
Automation Technologies 5/2014
Automation Technologies 5/2015
Automation Technologies 5/2016
WORLD OF INDUSTRIES - Industrial Automation 1/2017
WORLD OF INDUSTRIES - Industrial Automation 2/2017
WORLD OF INDUSTRIES - Industrial Automation 3/2017
WORLD OF INDUSTRIES - Industrial Automation 4/2017
WORLD OF INDUSTRIES - Industrial Automation 5/2017