Patent ID: 8257063
Filing Date: 2012-09-04
Classification: F04C,F16J,F25B

Abstract:
1. A refrigerant compressor comprising a mechanical seal installed between an inner circumferential surface of a boss portion of a housing through which a rotating shaft penetrates and an outer circumferential surface of the rotating shaft and the mechanical seal shaft seals an inner side and an outer side of the housing; and an oil discharge hole provided to an outside of the mechanical seal of the boss portion and which discharges leaked oil to the outside, wherein the mechanical seal comprises: a stationary ring securely fastened to the inner circumferential surface of the boss portion; and a rotary ring securely fastened to the outer circumferential surface of the rotating shaft to the inside of the stationary ring so as to face the stationary ring and to form a sliding contact between the sides of the stationary ring and the rotary ring that face each other, the rotary ring having an outer diameter smaller than an inner diameter of the boss portion, wherein the inner circumferential surface of the boss portion to the outside of the stationary ring comprises an inclined portion in which the entire inner circumference or at least a gravitationally lower portion of the surface of the boss portion to the outside of the stationary ring enlarges from the stationary ring side toward the oil discharge hole located to the outside of the stationary ring, and the stationary ring comprises a second inclined portion in which the entire inner circumference or at least a gravitationally lower portion of the inner circumferential surface of the stationary ring gradually enlarges from the rotary ring side toward the outer side.