TY - JOUR AB - In timing chain drives, the chain is the critical component regarding the wear. Relative movements take place at the chain joint between pin and bush, which lead to wear of the chain joint due to friction and so to chain elongation. The chain joint is generally lubricated with oils, through which elastohydrodynamic processes can occur in the gap between the pin and the bush of the chain joint. A simulation model is developed here to examine these elastohydrodynamic processes considering a mass conserving cavitation model, the Newtonian flow behaviour of the lubricant and the structuring of the bush surface, whereby the real form of the bush is considered. MBS simulations are used to obtain realistic loads on the chain joint. AU - Simo Kamga, Lionel AU - Meffert, Dominik AU - Magyar, Balázs AU - Oehler, Manuel AU - Sauer, Bernd ID - 34434 JF - Tribology International KW - EHL-simulation KW - Cavitation KW - Chain drives KW - Chain joint KW - Micro-structuring SN - 0301-679X TI - Simulative investigation of the influence of surface texturing on the elastohydrodynamic lubrication in chain joints VL - 171 ER - TY - CONF AB - Several positioning tasks demand translatory drive instead of rotary motion. To achieve drives that are capable e.g. to drive the sunroof of a car or to lift a car's window, multiple miniaturized motors can be combined. But in this case many other questions arise: the electromechanical behavior of the individual motors differs slightly, the motor characteristics are strongly dependent on the driving parameters and the driven load, many applications need some extra power for special cases like overcoming higher forces periodically. Thus, the bundle of motors has to act well organized and controlled to get an optimized drive that is not oversized and costly. AU - Hemsel, Tobias AU - Mracek, Maik AU - Wallaschek, Jörg AU - Vasiljev, Piotr ID - 9519 IS - Vol.2 KW - drives KW - electromechanical effects KW - linear motors KW - ultrasonic motors KW - car sunroof KW - car window KW - electromechanical behavior KW - high power ultrasonic linear motors KW - multiple miniaturized motors KW - positioning tasks KW - translatory drive KW - Costs KW - Electromagnetic forces KW - Frequency KW - Laboratories KW - Manufacturing KW - Mechatronics KW - Micromotors KW - Ultrasonic imaging KW - Vibrations KW - Voltage SN - 1051-0117 T2 - Ultrasonics Symposium, 2004 IEEE TI - A novel approach for high power ultrasonic linear motors VL - 2 ER -