Compressor device for controlling oil level in two-stage high dome compressor

摘要

A multi-stage compressor assembly including an arrangement for controlling the oil level having first and second capillary tubes. First capillary tube connects between the second stage high pressure housing at a level above the normal oil sump level to the first stage low pressure housing. The second capillary tube connects from the first stage housing at a point above the normal sump level to a point on the second stage suction tube. The oil level is automatically self compensating by the location of the capillary tube inlets and by differential housing pressure urging oil migration through the capillary tubes.