Bearing and bearing support for rotary piston engine for compressing and expanding gases

摘要

A rotary piston engine for compressing or expanding gases, which comprises a housing formed of two cylindrical semi-cups of two equal size cylindrical hollow bodies, said cups facing each other along longitudinal openings. In the housing there are provided two shafts of equal pitch diameter which shafts are rotatable about the central axis of one of two hollow bodies and mesh with a fine-toothed labyrinth with each other. Between each one of the shafts and the inner surface of the hollow body surrounding the pertaining shaft there is formed a working chamber intended for an adiabatic inner compression or expansion of the gases. The shafts respectively comprise a rotary piston extending over the length of the hollow body and extending with slight play to the inner wall of the hollow body and forming with the respective engaging parts of the inner wall of the hollow body a surface forming a gap seal or labyrinth gap seal. The shafts also have a recess adjacent the rotary piston and extend in an axis-parallel manner while the recess has a dimension making possible the meshing of the rotary piston of the other shaft, the two shafts being connected to two control gears which are rotatable about the central axis of said shafts outside the housing and mesh with each other. One of the shafts forms a hollow shaft while the recess in the hollow shaft has such a depth that in this hollow shaft a slot parallel to the axis of the shaft is formed and that the hollow shaft is rotatable about a hollow inner cylinder slit open over the length of the slot. The inner cylinder serves as outlet or inlet conduit while an opening in the housing correspondingly serves as inlet or outlet opening for the gases, and parts such as parts of the housing or of the shafts which have different temperatures and engage each other and are mechanically firmly connected to each other and are rotation symmetric about a common axis are separated from each other by an air gap provided on the conical surface of a cone with the axis of the cone located in the common axis of the parts to be interconnected. In the air gap there are provided connecting bodies of a material which is a poor heat conductor and will withstand high mechanical and thermal stresses. Such material may be quartz glass or porcelain or the like. The connecting bodies are so provided on those sides of the parts to be interconnected which face the air gap that in response to a heat expansion of the hotter part of the parts to be interconnected, the colder part is, due to a spring force, anchored in the two parts to be interconnected displaced in the direction of the common axis.