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Hermetic compressorRelated Patent Categories: Pumps, Motor Driven, Electric Or Magnetic Motor, Reciprocating Rigid Pumping MemberHermetic compressor description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070025864, Hermetic compressor. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of priority under 35 U.S.C. .sctn. 119 to Korean Patent Application No. 2005-68589, filed Jul. 27, 2005, the entire contents of which are incorporated herein by reference. This application may be related to commonly owned U.S. patent application Ser. No. 11/199,170, filed Aug. 9, 2005, and commonly owned U.S. patent application Ser. No. 11/232,936, filed Sep. 23, 2005, the contents of each of which are herein incorporated by reference. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to a hermetic compressor, and, more particularly, to a hermetic compressor in which a thrust bearing is in rolling contact with a rotating shaft to support an axial load of the rotating shaft. [0004] 2. Description of the Related Art [0005] In general, a hermetic compressor is an apparatus that enables a refrigeration cycle of an air conditioner or refrigerator by compressing and supplying fluid, such as refrigerant. The hermetic compressor includes a hermetic container forming the outer area of the compressor, a compression unit for compressing a refrigerant, and a drive unit for providing a refrigerant compression power, the compression unit and the drive unit being arranged in the hermetic container. [0006] The conventional hermetic compressor can supply oil to particular regions, such as a gap between rotating shaft and a hollow portion of a frame beneath a thrust bearing and frictional regions of the compression unit, by use of an oil supply configuration. However, the conventional hermetic compressor provides an insufficient oil supply to the thrust bearing, despite the fact that the load of the rotating shaft is substantially applied to the thrust bearing. As a result, after the compressor is used for a long time, upper and lower thrust washers and balls of the thrust bearing become worn, thereby inhibiting smooth rotation of the rotating shaft. Also, if dust (generally caused by wear) accumulates in the thrust bearing, it compromises the friction reducing efficiency of the thrust bearing, which results in degradation of the reliability of the compressor. SUMMARY OF THE INVENTION [0007] Therefore, the present invention has been made in order to solve the above problems, and it is an aspect of the invention to provide a hermetic compressor having an improved configuration for lubricating a thrust bearing which is in rolling contact with a rotating shaft to support an axial load of the rotating shaft, resulting in an improvement in the reliability of products. [0008] To this end, one non-limiting aspect of the present invention provides a hermetic compressor, the hermetic compressor including: a hermetic container having an oil sump defined in a bottom thereof; a frame arranged in the hermetic container and including a hollow portion; a rotating shaft rotatably inserted in the frame to penetrate through the hollow portion, the rotating shaft having an oil channel array to guide oil upward from the oil sump; and a thrust bearing inserted in a bearing installation groove, which is formed around an upper end of the hollow portion of the frame, the thrust bearing coming into rolling contact with the rotating shaft to support an axial load of the rotating shaft, wherein the oil channel array is configured to directly supply at least a portion of the oil to the thrust bearing. BRIEF DESCRIPTION OF THE DRAWINGS [0009] These and other aspects and advantages of the invention will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, of which: [0010] FIG. 1 is a side elevational view of a hermetic compressor in section according to a non-limiting aspect of the present invention; [0011] FIG. 2 is a partial side elevational view of a rotating shaft in section of the hermetic compressor according to another non-limiting aspect of the present invention; [0012] FIG. 3 is an enlarged perspective view of a non-limiting example of the rotating shaft of the hermetic compressor, showing the rotating shaft in partial section; [0013] FIG. 4 is a plan view of a branch channel in section of the rotating shaft of the hermetic compressor according to a non-limiting embodiment of the present invention; [0014] FIG. 5 is a side elevational view of the branch channel in section of the hermetic compressor according to another non-limiting embodiment of the present invention; and [0015] FIG. 6 is a side elevational view of the branch channel in section of the hermetic compressor according to another non-limiting embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS [0016] Reference will now be made in detail to non-limiting embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The embodiments are described below to explain the present invention by referring to the figures. [0017] By way of explanation, in the hermetic compressor, the compression unit and the drive unit may be located at upper and lower sides of a frame 11, respectively. The compression unit may include a cylinder and a piston 15. The cylinder may be arranged at a lateral location of an upper end of the frame 11 and may internally define a compression chamber. The piston 15 may be configured to linearly reciprocate in the compression chamber to compress a refrigerant. The drive unit may include a stator 12 connected to a lower end of the frame 11 and a rotor 13 located inside the stator 12 to electrically interact with the stator 12. [0018] A rotating shaft 20 may be mounted in the frame to transmit a driving force of the drive unit to the compression unit. The rotating shaft 20 may be rotatably inserted in a hollow portion 11a of the frame 11. [0019] A lower end portion of the rotating shaft 20 may protrude downward from the hollow portion of the frame so that it is press fitted into the rotor 13 to simultaneously rotate with the rotor 13. An upper end portion of the rotating shaft 20 may be laterally deviated to form an eccentric portion 22. The eccentric portion 22 of the rotating shaft 20 may be connected to the piston by interposing a connecting rod 18, so that a rotating motion of the rotating shaft 20 is converted into a linear reciprocating motion of the piston 15. Continue reading about Hermetic compressor... Full patent description for Hermetic compressor Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Hermetic compressor patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Hermetic compressor or other areas of interest. ### Previous Patent Application: Automatic inlet check valve release Next Patent Application: Electric motor having a coaxially associated pump Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Hermetic compressor patent info. IP-related news and info Results in 0.1616 seconds Other interesting Feshpatents.com categories: Tyco , Unilever , Warner-lambert , 3m 174 |
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