Abstract: The present invention relates to a self-cleaning rotary viewing hole and a centrifugal machine provided with said rotary viewing hole. The proposed rotary viewing hole includes a stationary frame (10); a transparent stationary panel (11) attached to said stationary frame by means of a leak-tight joint (41); a rotary frame (20) connected to said stationary frame (10) by means of a rotary joint (40); a transparent rotary panel (21) attached to said rotary frame (20) by means of a joint, said transparent rotary panel (21) being arranged opposite and spaced apart from the transparent stationary panel (11) by means of an intermediate chamber (1); and a motor (30) connected to said transparent rotary panel (21) or to said rotary frame (20), wherein the joint between the transparent rotary panel (21) and the rotary frame (20) is an interference joint (43) attached by means of a dimensional interference fit.

Abstract: The scraper device for centrifuge includes a tubular runner mounted on a fixed base with the capacity to rotate around and slide along a vertical central axis through the action of a rotation actuator and an up and down actuator, respectively, a scraper assembly including a blade and an blow nozzle fixed at a lower end of the tubular runner, a tubular rod coaxially installed inside the tubular runner and fixed at its upper end to the fixed base by a support, and upper and lower gas pipes telescopically coupled to one another, located inside the tubular rod, fixed to the tubular rod and to the tubular runner, respectively, and connected to a pressurized gas supply device and to the blow nozzle, respectively.