US 11,692,547 B2
Hermetic compressor having oil guide that surrounds rotating shaft
Junghoon Park, Seoul (KR); Sungyong Ahn, Seoul (KR); Taekyoung Kim, Seoul (KR); and Seheon Choi, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Mar. 16, 2022, as Appl. No. 17/696,236.
Claims priority of application No. 10-2021-0036174 (KR), filed on Mar. 19, 2021.
Prior Publication US 2022/0299024 A1, Sep. 22, 2022
Int. Cl. F04C 18/02 (2006.01); F04C 29/02 (2006.01); F04C 23/00 (2006.01); F04C 29/12 (2006.01)
CPC F04C 18/0215 (2013.01) [F04C 23/008 (2013.01); F04C 29/02 (2013.01); F04C 29/12 (2013.01); F04C 2240/30 (2013.01); F04C 2240/40 (2013.01); F04C 2240/50 (2013.01); F04C 2240/60 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A hermetic compressor, comprising:
a casing having an inner space defined therein and hermetically sealed;
a driving motor disposed in the inner space of the casing;
a rotating shaft coupled to the driving motor;
a compression unit disposed in the inner space of the casing and coupled to the rotating shaft;
a main frame disposed between the driving motor and the compression unit, the main frame comprising a shaft support protrusion that has an annular shape, that extends toward the driving motor, and that supports the rotating shaft;
a refrigerant suction pipe that passes through the casing and is coupled to the compression unit, the refrigerant suction pipe being in fluid communication with the compression unit;
a refrigerant discharge pipe that passes through the casing and is in fluid communication with the inner space of the casing;
a balance weight disposed at the rotating shaft and disposed between the driving motor and the main frame; and
an oil guide that surrounds the rotating shaft and is disposed between the driving motor and the main frame,
wherein the main frame and the rotating shaft are spaced apart from each other in a radial direction to thereby define a main bearing surface therebetween,
wherein the oil guide is disposed radially outward relative to the shaft support protrusion and surrounds the main bearing surface,
wherein the oil guide comprises an oil block that is fixed to the balance weight and extends toward the main frame, the oil block surrounding the main bearing surface,
wherein the balance weight comprises:
a fixed mass portion that has an annular shape and is fixed to the rotating shaft, and
an eccentric mass portion that extends from the fixed mass portion in the radial direction such that a weight of the balance weight is eccentric in the radial direction,
wherein the oil block is coupled to the eccentric mass portion, and
wherein an inner diameter of the oil block is less than an outer diameter of the eccentric mass portion and greater than an outer diameter of the fixed mass portion.