Rotary expansible chamber devices – Heat exchange or non-working fluid lubricating or sealing – Non-working fluid passage in inner working or reacting member
Patent
1975-01-20
1976-05-25
Vrablik, John J.
Rotary expansible chamber devices
Heat exchange or non-working fluid lubricating or sealing
Non-working fluid passage in inner working or reacting member
418113, 277 26, F01C 1902, F01C 2106, F16J 1500
Patent
active
039589072
ABSTRACT:
An improved sealing structure for rotary engines of the type having a housing with a rotor therein, the latter having at least two apices. The rotor includes a plurality of grooves corresponding to the number of apices and each groove is located at a respective one of the apices. A plurality of apex seals is provided with one disposed in each of the grooves so as to extend partially out of the groove to engage the housing. Each seal includes an internal closed cavity and the cavity, in turn, is only partially filled with a body of vaporizable material. The material has the characteristic of undergoing a phase change to the vapor phase when subjected to the relatively high temperatures present within the housing due to combustion gasses and frictional contact with the housing and from the vapor phase when subjected to the relatively lower temperature of the rotor. The material circulates within the seal while undergoing phase changes to continuously cool the seals to preclude distortion of the same.
REFERENCES:
patent: 1763574 (1930-06-01), Williams
patent: 3007600 (1961-11-01), Horner
patent: 3113526 (1963-12-01), Paschke
patent: 3180564 (1965-04-01), Fuhrmann et al.
Caterpillar Tractor Co.
Vrablik John J.
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