Arrangement comprising a hydrodynamically journalled reciprocable and rotatable piston.

摘要

An arrangement, more particularly a freely reciprocating engine, comprising a piston which can reciprocate and also rotate in a cylinder (1) and which is journalled in the cylinder by means of a hydrodynamic groove bearing, the piston having two end faces which are acted upon during operation by different fluid pressures (P @SB1,P2), and the piston being provided with at least one sealing part (2) having a circular-cylindrical smooth sealing surface and with at least one bearing part (3) which is provided in its peripheral surface with a hydrodynamically acting groove pattern.