Abstract
The paper deals with the “teeth ends - footstep” friction couple operating conditions of the gear pump applied in the long - stroke low - speed compressors cylinders cooling systems. The NSh-32K gear pump “teeth ends - footstep” friction couple operating conditions are considered in the paper. The fundamental principles and calculation data on the basis of “classical” theory and using the fractal approach for rough friction surfaces describing of the sliding friction couple are represented. The results show the principal results agreement of the friction couple operating conditions estimation on both theories. It was concluded that the fractal approach of the friction couple rough surfaces representation is the most appropriate one for the tight fixed joints describing under the saturated contact of the interacting rough surfaces microroughnesses at the rough surfaces relative contact area high values.
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