Drehkolbenmaschine

摘要

The invention relates to a rotary piston type machine in which an externally toothed wheel and an internally toothed ring form displacement chambers, and one of the toothed elements is connected by way of a universal joint shaft to a rotary slide which, together with a valve part connected to the other toothed element, forms a diversion valve. In such machines the connection between the one toothed element and the associated rotary slide, by way of the universal joint shaft, results in a certain amount of play. This causes leading and lagging between cooperating valve parts with the result that the machine suffers a loss in capacity because of imprecise control of the rotary slide. The lead and lag angles are even greater if the universal joint shaft is coupled to the main shaft and undergoes additional torsion with increasing input and output capacity of the machine. Means are provided to slightly rotate one of the valve elements relative to the main shaft in the reversed direction to compensate for the leading or lagging tendencies referred to.