F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
F04D 29/08 (2006.01) F16J 15/34 (2006.01)
Patent
CA 2143174
A seal construction is provided for sealing a rotating pump shaft against passage of a fluid along its central axis. The seal construction includes front and rear sealing flanges mounted coaxially to and rotatable with the pump shaft. Stationary engaging members are provided adjacent the rear surface of the front sealing flange and the front surface of the rear sealing flange for sealing engagement therewith. Diaphragms are provided across fluid passageways associated with each engaging member thereby allowing the pressure of fluids adjacent each engaging member to dictate the force to be placed by the diaphragm on the sealing engagement between the corresponding engaging member and surface of the associated sealing flange. A temperature stabilized chamber is provided adjacent each sealing flange including means for recirculating and cooling fluid disposed therein so as to maintain the fluid between adjacent engaging members at a substantially constant temperature thereby maintaining a flatness of the sealing engagement between the sealing flange surfaces and the engaging members. The recirculating/cooling system includes a plurality of vanes mounted on and integrally formed with the sealing flange, the vanes causing the fluid within the chambers to flow circumferentially around the pump shaft and exit the chamber by way of an exit orifice, then reenter the chamber through an entry orifice with the fluid being cooled at a location in the circulation line remote from the chamber disposed between adjacent engaging members.
Environamics Corporation
Nexus Law Group Llp
LandOfFree
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