gelidusoptimus
19-03-2011, 03:51 AM
Good evening to everyone.
I´m taking a course on Copeland semi-hermetic compressor failures. It includes the de-assembly of several dead compressors. Right know we are looking at a case involving the revolving rotor cutting thorugh the windings due to bearing failure. The compressors is a 3DS , three cylinder unit. As far as I can see, there are three bearings supporting the crankshaft: frontal side, middle and back side. I´ve noticed that the middle bearing is not completely smooth, but rather has some kind of pattern formed on its surface: it looks like an "U". The instructor said that this bushing must be located in such a way that the crankshaft rests on this "U", whose function is to serve as an oil reservoir. From here, the rotating crankshaft picks oil up and carries it upward in order to lubricate the upper part of the bushing. Is this right ? There is a classmate who believes that the bushing must be located in such a way that the upper part of the crankshaft makes contact with the inverted "U", so that the flow of oil that comes out of the crankshaft orificies runs down through the "legs" of the inverted "U" pattern towards the lower part of the bearing. Does anynone know what is the correct positioning of this bearing ?
Thank you.
Regards.
I´m taking a course on Copeland semi-hermetic compressor failures. It includes the de-assembly of several dead compressors. Right know we are looking at a case involving the revolving rotor cutting thorugh the windings due to bearing failure. The compressors is a 3DS , three cylinder unit. As far as I can see, there are three bearings supporting the crankshaft: frontal side, middle and back side. I´ve noticed that the middle bearing is not completely smooth, but rather has some kind of pattern formed on its surface: it looks like an "U". The instructor said that this bushing must be located in such a way that the crankshaft rests on this "U", whose function is to serve as an oil reservoir. From here, the rotating crankshaft picks oil up and carries it upward in order to lubricate the upper part of the bushing. Is this right ? There is a classmate who believes that the bushing must be located in such a way that the upper part of the crankshaft makes contact with the inverted "U", so that the flow of oil that comes out of the crankshaft orificies runs down through the "legs" of the inverted "U" pattern towards the lower part of the bearing. Does anynone know what is the correct positioning of this bearing ?
Thank you.
Regards.