The present invention relates to lubrication systems for hermetic compressors and in particular vertically oriented hermetic compressors having a pick-up tube or shaft end which extends into the oil contained in a sump.
Hermetic compressors having hollow shafts or pick-up tubes which extend into the oil contained in a sump are used for drawing lubricant from the sump and providing it to moving parts of the compressor assembly. Often these tubes or shafts are provided with a paddle for pumping the oil through the shaft or tube. A problem experienced with pick-up tubes or shafts is that on their rotation they tend to create vortices around the end of the shaft or tube which extends into the oil. These vortices hinder the performance of oil delivery into the tube or shaft. A way of preventing the formation of these vortices is desirable.