Importance

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Abstract

A machine unit which includes a refrigerating compressor and an internal combustion engine of the trochoid type including pistons revolving in a planetary arrangement on eccentrics of the same eccentric shaft, as well as a ventilatable intermediate sealing arrangement provided in a central casing element between the casing elements of the internal combustion engine and the compressor. As disposed between the eccentric of the internal combustion engine and the main bearing, the intermediate sealing arrangement is composed of two slip rings revolving with the shaft; a stationary intermediate element is provided in the central casing element, the slip rings being in continuous sliding contact with the intermediate element with sealing action through insert rings pressed against the intermediate element under gas pressure respectively spring action, one of the slip rings is prevented from axial displacement in the direction towards the eccentric of the internal combustion engine by a shoulder of the shaft; a pin inserted into the shaft and in engagement with an axial groove in the ring, counters any tumbling and staggering movement in rotation; another slip ring is prevented from axial displacement and rotational tumbling and staggering movement by a ball engaging into a recess in the slip ring.

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First Claim