F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
F04B 35/01 (2006.01) F04B 25/00 (2006.01) F04B 31/00 (2006.01) F04B 37/12 (2006.01)
Patent
CA 2511254
A high-pressure gas compressor comprises a single-acting cam driven piston with a pressure compensation chamber disposed between the piston and the cam. A roller tappet assembly transmits reciprocating motion from the cam to the piston. A pressurized gas can be directed to the pressure compensation chamber to offset some of the forces acting on the piston from the gas pressure in the compression chamber, thereby reducing the Hertzian pressure between the tappet roller and the cam. In addition, overall efficiency and durability can be improved by reducing friction between compressor components, for example by employing thin film coatings to reduce friction coefficients, pressurized oil lubrication systems, and higher cylinder bore diameter to piston stroke ratios to reduce piston velocity. The service life of gas seals and compression efficiency can also be improved by thermal management strategies including liquid-cooled compressor cylinder liners and the use of intercoolers between compression stages. Finally, employing a poppet-style intake valve and reducing the parasitic volume in the compression chamber can also improve compressor's volumetric efficiency.
Bartunek Bernd
Blank Martin
Hilger Ulrich
Gowling Lafleur Henderson Llp
Westport Power Inc.
Westport Research Inc.
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