| 摘要 |
A pressure vessel comprises a rigid envelope enclosing a chamber and consisting of a body and cover, the rim of the cover being inserted in the rim of the body, and the body and cover being secured to each other. Defined between the overlapping rims is an annular groove adapted to receive a flange at the periphery of a circular flexible diaphragm, which serves to divide the chamber into two compartments of variable volume. There is a fluid orifice in both the body and cover, the two orifices being axially alinged and communicating one with each variable-volume compartment. To ensure a good seal between the compartments, and to enhance retention of the flange in the groove, the annular groove is of less height and greater width than the flange on the diaphragm, before the flange is sandwiched into the groove between the rims of the cover and body, so that the flange is deformed into the groove, when the cover is assembled on the body. The rims on the cover and body may be shouldered for good co-operation therebetween and the shoulder reinforced on the outside of the vessel so that it does not collapse when the vessel is pressurized. |
