Seal for a piston rod of the stirling engine

摘要

A seal for a piston rod of the stirling engine sends a fluid enters an intermediate chamber 11 to return it has a chamber 13 filled with fluid via a scraper of oil 12 adjacent to this chamber. The chamber comprises an o-ring 22 fixed to the piston rod 8 has a location or the seal is located immediately to the - the top of the scraper of the oil when the piston rod is in its dead inferior. The intermediate chamber comprises a space 21 contiguous to the blade of an oil having a reduced diameter equal to the dimension of the outer diameter of the o-ring. When the piston rod descends to the dead point inferior, the o-ring is moved into the space a reduced diameter, to the scraper oil. As a result of the sliding contact under pressure between the outer circumference of the o-ring seal with the inner wall of the space a reduced diameter, the latter is pressurized in order to expel the fluid enters the intermediate chamber from the space a reduced diameter in order to make it enter the chamber filled with fluid passing through the scraper of oil. / p & & p & application to the stirling engines.