| 摘要 |
PURPOSE:To secure the sealing between an intermediate pressure chamber and an airtight vessel by providing a rummer to be interlocked with a crank shaft at the lower end of a frame and discharging refrigerating machine oil forcedly by suction to the runner via a bearing gap for filling the bearing gap constantly with oil. CONSTITUTION:A runner 20 is arranged on a crank shaft 4, and the suction port of the runner 20 is faced to a gap part 25 between the crank shaft 4 and a frame 18 for forcedly sucking a part of refrigerating machine oil supplied to a bearing part and refrigerating gas existing in the gap part 25 and returning them to an airtight vessel 1. As the said runner 20 is rotated, the pressure in a gap cavity 22 under the frame 18 is discharged by the runner 20 and lowered under the delivery pressure. Consequently, the oil is forcedly sucked into the cavity 22 via an oil hole 13 and an oil-feed hole 14, discharged by the runner 20, and then returned to an oil reservoir at the bottom of the airtight vessel 1 via a space 24. Since the bearing gap 25 is filled with the oil for sure, the sealing between an intermediate pressure chamber 16 and the airtight vessel 1 can be surely maintained for improving the capacity of a scroll compressor. |
