| 摘要 |
The invention relates to a device for insuring the tight seal of a closed space filled with a gas at high pressure through one wall of which an outlet rod is positioned, said outlet rod being subject to reciprocating rectilinear movement. Between the walls of the closed space and the outlet rod, two dynamic seals and a rolling diaphragm are successively positioned. Between these two seals, the outlet rod has a shoulder such that in combination with two non-return valves, it acts as a pump which sucks the gas from the chamber formed by the intermediate seal and the rolling diaphragm and delivers this gas to the closed space, thereby maintaining a relatively low pressure on the rolling diaphragm despite leakage of the seals and valves. This invention is particularly applicable to Stirling engines. |
