Patent ID: 6024548
Filing Date: 2000-02-15
Classification: F04C

Abstract:
In a high side rotary compressor having a shell with a first end and a second end, a cylinder having a bore containing pump structure including a piston coacting with said cylinder, said cylinder being fixedly located in said shell near said first end and defining with said first end a chamber, an oil sump located at the bottom of said chamber, a first bearing underlying said bore and secured to said cylinder and extending towards said first end, a second bearing having a bore and secured to said cylinder and overlying said bore in said cylinder and extending towards said second end, a motor including a rotor and a stator, a shaft supported by said first and second bearings and including an eccentric operatively connected to said piston, means for providing lubrication comprising:an axial bore in said shaft;an oil pickup tube extending from said sump to said axial bore;a plurality of oil distribution passages fluidly connected to said axial bore for delivering oil at axially spaced locations on said shaft;said shaft having first and second journals spaced by a recessed area defining an oil annulus with said journals being located in and supported by said bore of said second bearing;an axially extending groove in said bore of said second bearing coextensive with said first one of said journals which is located nearer said cylinder and a portion of said oil annulus;an axially extending groove in said shaft extending from said oil annulus the full length of said second journal and beyond said second bearing; andat least one of said oil distribution passages providing pressurized oil from said sump to said axially extending groove in said bore of said second bearing.