차량용 마그네틱클러치의 마찰특성
Friction Characteristics of Magnetic Clutch Used in Automobiles
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초록
A magnetic clutch consists of pulley and disk. It delivers and isolates the power needed for the operation of the compressor used in automotive air conditioning system. To improve the performance, efficiency and durability of automotive air conditioning system, appropriate design of pulley, disk and system working parameters(the magnitude of magnetic force, and so on) is necessary. For that goal, it is required to understand the friction haracteristics of magnetic clutch for the initial operating time. In this study, friction tests were carried out in order to investigate the effect of sliding velocity on the friction characteristics of magnetic clutch using pinon-disk type friction and wear tester. For experiments, pulley and disk used in real automotive air conditioning system were considered. Friction experiments were conducted under various sliding velocities, and coefficients of kinetic friction were obtained. Under the experimental conditions considered in this study, the coefficients of kinetic friction increased with the increase of test number(sliding distance) and decreased with the increase of sliding velocity.
Abstract
A magnetic clutch consists of pulley and disk. It delivers and isolates the power needed for the operation of the compressor used in automotive air conditioning system. To improve the performance, efficiency and durability of automotive air conditioning system, appropriate design of pulley, disk and system working parameters(the magnitude of magnetic force, and so on) is necessary. For that goal, it is required to understand the friction haracteristics of magnetic clutch for the initial operating time. In this study, friction tests were carried out in order to investigate the effect of sliding velocity on the friction characteristics of magnetic clutch using pinon-disk type friction and wear tester. For experiments, pulley and disk used in real automotive air conditioning system were considered. Friction experiments were conducted under various sliding velocities, and coefficients of kinetic friction were obtained. Under the experimental conditions considered in this study, the coefficients of kinetic friction increased with the increase of test number(sliding distance) and decreased with the increase of sliding velocity.
참고문헌 (4)
- Marklund, P, "Wet Clutch Friction Characteristics Obtained from Simplified Pin on Disk Test", Tribology International, 41, pp.824~830 (2008)
- Eguchi, M, "Shear Characteristics of a Boundary Film for a Paper-based Wet Friction Material: Friction and Real Contact Area Measurement", Tribology International, 38, pp.327~335 (2005)
- Bhushan, B, "Principles and applications of tribology, Chap. 4&6" (1999), JOHN WILEY & SONS, INC
- Rabinowicz, E, "Friction and wear of materials, Chap. 4" (1995), JOHN WILEY & SONS, INC