Apparatus for preventing the rise of oil in a Stirling engine.

摘要

An apparatus for preventing lubricating oil from rising to the working spaces of a Stirling engine has a first and a second oil-absorbing member (31, 33) disposed within a cylindrical member (16) in which a rod (19) reciprocates. The first oil-absorbing member (31) is secured to the rod (19) with its outer periphery in sliding contact with the inner wall of the cylindrical member (16), and the second oil-absorbing member (33) is secured to the cylindrical member (16) with its inner periphery in sliding contact with the rod (19). A first baffle plate (34) having a hole which is larger than the rod (19) is secured to the cylindrical member (16) immediately below and in intimate contact with the second oil-absorbing member (33). The first baffle plate (34) makes the flow speed of gas through the second oil-absorbing member (33) higher from above to below than from below to above. As a result, oil is continually blown downwards by a blast of accelerated gas and is returned to the crankcase (1) of the engine.