US20050089416A1 - Hermetic compressor - Google Patents
Hermetic compressor Download PDFInfo
- Publication number
- US20050089416A1 US20050089416A1 US10/781,300 US78130004A US2005089416A1 US 20050089416 A1 US20050089416 A1 US 20050089416A1 US 78130004 A US78130004 A US 78130004A US 2005089416 A1 US2005089416 A1 US 2005089416A1
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- United States
- Prior art keywords
- oil
- hermetic compressor
- rotating shaft
- bearing seat
- thrust bearing
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- Abandoned
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- 238000007599 discharging Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 2
- 230000006835 compression Effects 0.000 abstract description 29
- 238000007906 compression Methods 0.000 abstract description 29
- 239000003507 refrigerant Substances 0.000 abstract description 17
- 230000005672 electromagnetic field Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/02—Lubrication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/02—Lubrication
- F04B39/0223—Lubrication characterised by the compressor type
- F04B39/023—Hermetic compressors
- F04B39/0238—Hermetic compressors with oil distribution channels
- F04B39/0246—Hermetic compressors with oil distribution channels in the rotating shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/122—Cylinder block
Definitions
- the present invention relates, in general, to hermetic compressors and, more particularly, to a hermetic compressor which uses a bearing to execute a smooth operation between moving parts of the hermetic compressor.
- compressors are machines that compress a substance, such as a gas refrigerant, to reduce a volume and thus increase a pressure of the substance or change a phase of the substance.
- a substance such as a gas refrigerant
- hermetic compressors are typically used in refrigeration systems to compress a gas refrigerant within a hermetic compression chamber while converting a rotating motion into a rectilinear motion, prior to discharging the compressed refrigerant to a condenser.
- hermetic compressors having the above-mentioned use have a hermetic casing.
- the hermetic casing is fabricated with upper and lower casing parts assembled into a single body, and has a compression unit and a drive unit therein.
- the compression unit draws and then compresses a gas refrigerant, while the drive unit generates a drive power to operate the compression unit.
- the compression unit has a cylinder block which is integrated with a frame and defines a compression chamber therein, and a cylinder head which is mounted to the cylinder block.
- the cylinder head has both a suction chamber to draw the gas refrigerant into the compression chamber and an exhaust chamber to release the compressed refrigerant from the compression chamber to an outside of the hermetic casing.
- the conventional hermetic compressors further include a piston which is received in the compression chamber to execute a rectilinear reciprocating motion in the compression chamber.
- the drive unit is placed under the compression unit in the hermetic casing, and includes a stator along which an electromagnetic field is generated when electricity is applied to the stator.
- the drive unit further includes a rotor which rotates by the electromagnetic field generated along the stator, and a rotating shaft which axially penetrates a center of the rotor so as to rotate along with the rotor.
- the rotating shaft is set in a bore of the frame, with an eccentric part provided at an upper end of the rotating shaft.
- the frame has a bearing seat at an upper end of the bore, and a thrust bearing is seated in the bearing seat of the frame, thus supporting the eccentric part of the rotating shaft.
- the above-mentioned conventional hermetic compressor is problematic as follows. When an impact is applied to the rotating shaft during a refrigerant compressing operation of the piston in the compression chamber, the impact is concentrated on a ball of the thrust bearing. The ball of the thrust bearing is thus overloaded, so that the thrust bearing cannot smoothly rotate and thereby cannot effectively support a rotation of the eccentric part of the rotating shaft.
- a hermetic compressor which has an improved bearing seat structure to seat a thrust bearing therein while allowing the thrust bearing to smoothly rotate, regardless of a load imposed on the thrust bearing during an operation of the hermetic compressor, thus effectively supporting a rotation of a rotating shaft of a drive unit.
- a hermetic compressor including: a hollow frame; a rotating shaft placed in a hollowed part of the frame so as to rotate relative to the frame; an eccentric part provided on the rotating shaft as to eccentrically rotate; a piston to rectilinearly move, in response to an eccentric rotation of the eccentric part; a cylinder provided on an upper end of the hollow frame so as to allow the piston to compress a fluid in the cylinder; a bearing seat provided on an upper end of the hollowed part of the frame; a thrust bearing seated in the bearing seat so as to support the eccentric part; an oil path provided in the rotating shaft so as to guide oil upward; an oil discharge hole to communicate with the oil path, thus discharging the oil to an outer surface of the rotating shaft; and an oil slot provided in the bearing seat, thus allowing the oil discharged from the oil discharge hole to flow through the oil slot.
- the oil slot may extend on a bottom surface of the bearing seat in a radial direction.
- the bearing seat may include an inclined surface which is formed around the bottom surface of the bearing seat while being inclined upward and outward, with a diameter of the inclined surface increasing in an outward direction from an inside edge to an outside edge of the inclined surface.
- the oil slot may extend to the inclined surface of the bearing seat and to an edge of the hollowed part of the frame, thus having extension slot parts with predetermined lengths.
- the oil slot may comprise a plurality of oil slots which are formed on the bearing seat while being spaced apart from each other at predetermined angular intervals.
- the oil slot may be widened at an oil inlet of the oil slot.
- the oil slot may be shaped in a helical manner, with a width of the oil slot reducing in a direction from an oil inlet to an oil outlet of the oil slot.
- FIG. 1 is a side sectional view showing a construction of a hermetic compressor, according to the present invention
- FIG. 2 is an exploded perspective view of a frame of the hermetic compressor, according to a first embodiment of the present invention
- FIG. 3 is a plan view showing a shape of an oil slot of the frame of FIG. 2 ;
- FIGS. 4 and 5 are plan views respectively showing shapes of oil slots, according to second and third embodiments of the present invention.
- FIG. 1 is a side sectional view showing a construction of a hermetic compressor, according to the present invention.
- the hermetic compressor includes a hermetic casing 10 which is fabricated with upper and lower casing parts 11 and 12 assembled into a hermetic single body.
- the hermetic compressor further includes a compression unit 20 to draw and compress a gas refrigerant, and a drive unit 30 to drive the compression unit 20 .
- the compression unit 20 has a cylinder block 22 which is integrated with a frame 21 and defines a compression chamber 22 a therein, and a cylinder head 23 which is mounted to the cylinder block 22 .
- the cylinder head 23 has both a suction chamber 23 a to draw the gas refrigerant into the compression chamber 22 a and an exhaust chamber 23 b to release the compressed refrigerant from the compression chamber 22 a to an outside of the hermetic casing 10 .
- the hermetic compressor further includes a piston 24 which is received in the compression chamber 22 a to execute a rectilinear reciprocating motion in the compression chamber 22 a.
- the hermetic compressor further includes a valve plate 25 .
- the valve plate 25 is interposed between the cylinder block 22 and the cylinder head 23 to control flows of the refrigerant drawn into and discharged from the compression chamber 22 a.
- the drive unit 30 is placed under the compression unit 20 in the hermetic casing 10 , and includes a stator 31 along which an electromagnetic field is generated when electricity is applied to the stator 31 .
- the drive unit 30 further includes a rotor 32 which rotates by the electromagnetic field generated along the stator 31 , and a rotating shaft 33 which axially penetrates a center of the rotor 32 so as to rotate along with the rotor 32 .
- the rotating shaft 33 has an eccentric part 34 which is provided at an upper end of the rotating shaft 33 to eccentrically rotate.
- the eccentric part 34 of the rotating shaft 33 includes a balance weight 34 a to allow the rotating shaft 33 to rotate while keeping balance thereof regardless of the eccentric part 34 , and an eccentric shaft 34 b which extends upward from the balance weight 34 a to a predetermined length and eccentrically rotates during a rotation of the rotating shaft 33 .
- the piston 24 is connected to the eccentric shaft 34 b of the eccentric part 34 through a connecting rod 35 , so that the eccentric rotation of the eccentric shaft 34 b is converted into a rectilinear reciprocation of the piston 24 by the connecting rod 35 .
- the rotating shaft 33 is set in a bore 21 a of the frame 21 .
- the frame 21 has an annular bearing seat 40 around an upper end of the bore 21 a , and a thrust bearing 50 is seated in the bearing seat 40 of the frame 21 , thus supporting the eccentric part 34 of the rotating shaft 33 .
- the thrust bearing 50 includes a plurality of balls 51 which are supported between upper and lower races 52 and 53 .
- the rotating shaft 33 has an oil path 33 a .
- the oil path 33 a extends through the rotating shaft 33 from a lower end of the rotating shaft 33 to the eccentric shaft 34 b , thus drawing and guiding oil L to the eccentric shaft 34 b .
- the rotating shaft 33 further includes a spiral oil groove 33 b .
- the spiral oil groove 33 b is formed around an outer surface of the rotating shaft 33 from a position where the rotating shaft 33 is in sliding contact with the frame 21 .
- the spiral oil groove 33 b communicates with the oil path 33 a via both an oil suction hole 33 d and an oil discharge hole 33 c which are respectively provided at upper and lower ends of the spiral oil groove 33 b.
- the oil L is drawn from a bottom of the hermetic casing 10 into the oil path 33 a of the rotating shaft 33 , and flows upward to a predetermined height along the oil path 33 a , prior to being discharged from the oil path 33 a to the spiral oil groove 33 b through the oil discharge hole 33 c .
- the discharged oil thereafter, flows along the spiral oil groove 33 b , thus forming lubrication layers in the junction gaps between the rotating shaft 33 and the frame 21 and between the rotating shaft 33 and the thrust bearing 50 .
- the hermetic compressor of the present invention further includes a plurality of oil slots 43 which are formed on the bearing seat 40 while being spaced apart from each other at regular angular intervals, as shown in FIG. 2 .
- the bearing seat 40 includes an annular bottom surface 41 , with an annular inclined surface 42 which is formed around the annular bottom surface 41 while being inclined upward and outward.
- a diameter of the annular inclined surface 42 gradually increases in an outward direction from an inside edge to an outside edge of the annular inclined surface 42 .
- Each of the oil slots 43 extends from a predetermined portion of the annular inclined surface 42 to an edge of the upper end of the bore 21 a , so that each of the oil slots 43 has an upper extension slot part 45 with an oil outlet and a lower extension slot part 44 with an oil inlet.
- the oil L flows under a lower surface of the thrust bearing 50 , thus the oil L hydraulically supports the lower race 53 of the thrust bearing 50 .
- shapes of the oil slots 43 may be alternately designed without affecting the functioning of the invention, as shown in FIGS. 3, 4 and 5 .
- the oil slots 43 are formed on the bearing seat 40 such that each of the oil slots 43 extends in a radial direction while having a constant width, as shown in FIG. 3 .
- the oil slots 43 are formed to respectively have widened oil inlets 43 a , as shown in FIG. 4 .
- the oil slots 43 are shaped in a helical manner, with a width of each of the oil slots 43 gradually reducing in a direction from the oil inlet 43 a to the oil outlet 43 b , as shown in FIG. 5 .
- the oil L is smoothly introduced into the oil slots 43 , during an operation of the hermetic compressor.
- the oil L flows upward along the oil path 33 a of the rotating shaft 33 .
- a part of the oil L is discharged from the oil path 33 a to the spiral oil groove 33 b through the oil discharge hole 33 c .
- the discharged oil thereafter, flows along the spiral oil groove 33 b while lubricating the rotating shaft 33 and the thrust bearing 50 .
- the oil L further flows through the plurality of oil slots 43 which are placed under the lower surface of the thrust bearing 50 , thus the oil L hydraulically supports the lower race 53 of the thrust bearing 50 upward.
- the impact load imposed on the thrust bearing 50 is evenly distributed along a junction between the lower race 53 and the all balls 51 of the thrust bearing 50 , because the oil L hydraulically supports the lower race 53 of the thrust bearing 50 upward.
- the thrust bearing 50 thus smoothly rotates and thereby effectively supports the rotation of the eccentric part 34 of the rotating shaft 33 .
- the hermetic compressor of the present invention thus reduces vibration of the balls 51 and the lower race 53 of the thrust bearing 50 , and attenuates noise caused by the vibration.
- the hermetic compressor further has improved operational efficiency.
- the present invention provides a hermetic compressor, in which a plurality of oil slots are formed on a bearing seat that seats a thrust bearing therein. During an operation of the hermetic compressor, oil flows through the plurality of oil slots while hydraulically supporting a lower surface of the thrust bearing upward.
- the hermetic compressor of the present invention reduces vibration of the balls and the lower race of the thrust bearing, and attenuates noise caused by the vibration.
- the hermetic compressor further has improved operational efficiency.
Abstract
A hermetic compressor, in which a plurality of oil slots are formed on a bearing seat that seats a thrust bearing therein. During an operation of the hermetic compressor, oil flows through the plurality of oil slots while hydraulically supporting a lower surface of the thrust bearing upward. Therefore, even when an impact is applied from a piston to a rotating shaft during a refrigerant compressing operation of the piston in a compression chamber, the impact load imposed on the thrust bearing is evenly distributed along a junction between a lower race and all balls of the thrust bearing, because the oil hydraulically supports the lower race of the thrust bearing upward. The thrust bearing thus smoothly rotates and effectively supports the rotation of an eccentric part of the rotating shaft. Therefore, the hermetic compressor reduces vibration of the balls and the lower race of the thrust bearing, and attenuates noise caused by the vibration. The hermetic compressor further has improved operational efficiency.
Description
- This application claims the benefit of Korean Patent Application No. 2003-75214, filed Oct. 27, 2003 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.
- 1. Field of the Invention
- The present invention relates, in general, to hermetic compressors and, more particularly, to a hermetic compressor which uses a bearing to execute a smooth operation between moving parts of the hermetic compressor.
- 2. Description of the Related Art
- Generally, compressors are machines that compress a substance, such as a gas refrigerant, to reduce a volume and thus increase a pressure of the substance or change a phase of the substance. As an example of the compressors, hermetic compressors are typically used in refrigeration systems to compress a gas refrigerant within a hermetic compression chamber while converting a rotating motion into a rectilinear motion, prior to discharging the compressed refrigerant to a condenser.
- Conventional hermetic compressors having the above-mentioned use have a hermetic casing. The hermetic casing is fabricated with upper and lower casing parts assembled into a single body, and has a compression unit and a drive unit therein. The compression unit draws and then compresses a gas refrigerant, while the drive unit generates a drive power to operate the compression unit.
- In the conventional hermetic compressors, the compression unit has a cylinder block which is integrated with a frame and defines a compression chamber therein, and a cylinder head which is mounted to the cylinder block. The cylinder head has both a suction chamber to draw the gas refrigerant into the compression chamber and an exhaust chamber to release the compressed refrigerant from the compression chamber to an outside of the hermetic casing. The conventional hermetic compressors further include a piston which is received in the compression chamber to execute a rectilinear reciprocating motion in the compression chamber.
- The drive unit is placed under the compression unit in the hermetic casing, and includes a stator along which an electromagnetic field is generated when electricity is applied to the stator. The drive unit further includes a rotor which rotates by the electromagnetic field generated along the stator, and a rotating shaft which axially penetrates a center of the rotor so as to rotate along with the rotor.
- The rotating shaft is set in a bore of the frame, with an eccentric part provided at an upper end of the rotating shaft. The frame has a bearing seat at an upper end of the bore, and a thrust bearing is seated in the bearing seat of the frame, thus supporting the eccentric part of the rotating shaft.
- The above-mentioned conventional hermetic compressor is problematic as follows. When an impact is applied to the rotating shaft during a refrigerant compressing operation of the piston in the compression chamber, the impact is concentrated on a ball of the thrust bearing. The ball of the thrust bearing is thus overloaded, so that the thrust bearing cannot smoothly rotate and thereby cannot effectively support a rotation of the eccentric part of the rotating shaft.
- In a detailed description, because the load imposed on the thrust bearing is unevenly distributed on all balls of the thrust bearing, friction between the balls and a lower race of the thrust bearing increases. The conventional hermetic compressor thus generates noise, and has reduced operational efficiency.
- Accordingly, it is an aspect of the present invention to provide a hermetic compressor, which has an improved bearing seat structure to seat a thrust bearing therein while allowing the thrust bearing to smoothly rotate, regardless of a load imposed on the thrust bearing during an operation of the hermetic compressor, thus effectively supporting a rotation of a rotating shaft of a drive unit.
- Additional aspects and/or advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
- The above and/or other aspects are achieved by providing a hermetic compressor, including: a hollow frame; a rotating shaft placed in a hollowed part of the frame so as to rotate relative to the frame; an eccentric part provided on the rotating shaft as to eccentrically rotate; a piston to rectilinearly move, in response to an eccentric rotation of the eccentric part; a cylinder provided on an upper end of the hollow frame so as to allow the piston to compress a fluid in the cylinder; a bearing seat provided on an upper end of the hollowed part of the frame; a thrust bearing seated in the bearing seat so as to support the eccentric part; an oil path provided in the rotating shaft so as to guide oil upward; an oil discharge hole to communicate with the oil path, thus discharging the oil to an outer surface of the rotating shaft; and an oil slot provided in the bearing seat, thus allowing the oil discharged from the oil discharge hole to flow through the oil slot.
- The oil slot may extend on a bottom surface of the bearing seat in a radial direction.
- The bearing seat may include an inclined surface which is formed around the bottom surface of the bearing seat while being inclined upward and outward, with a diameter of the inclined surface increasing in an outward direction from an inside edge to an outside edge of the inclined surface.
- The oil slot may extend to the inclined surface of the bearing seat and to an edge of the hollowed part of the frame, thus having extension slot parts with predetermined lengths.
- The oil slot may comprise a plurality of oil slots which are formed on the bearing seat while being spaced apart from each other at predetermined angular intervals.
- The oil slot may be widened at an oil inlet of the oil slot.
- The oil slot may be shaped in a helical manner, with a width of the oil slot reducing in a direction from an oil inlet to an oil outlet of the oil slot.
- These and other aspects and advantages of the invention will become apparent and more readily appreciated from the following description of the preferred embodiments, taken in conjunction with the accompanying drawings of which:
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FIG. 1 is a side sectional view showing a construction of a hermetic compressor, according to the present invention; -
FIG. 2 is an exploded perspective view of a frame of the hermetic compressor, according to a first embodiment of the present invention; -
FIG. 3 is a plan view showing a shape of an oil slot of the frame ofFIG. 2 ; and -
FIGS. 4 and 5 are plan views respectively showing shapes of oil slots, according to second and third embodiments of the present invention. - Reference will now be made in detail to the present preferred 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 in order to explain the present invention by referring to the figures.
-
FIG. 1 is a side sectional view showing a construction of a hermetic compressor, according to the present invention. - As shown in
FIG. 1 , the hermetic compressor according to the present invention includes ahermetic casing 10 which is fabricated with upper andlower casing parts compression unit 20 to draw and compress a gas refrigerant, and adrive unit 30 to drive thecompression unit 20. - In the hermetic compressor, the
compression unit 20 has acylinder block 22 which is integrated with aframe 21 and defines acompression chamber 22 a therein, and acylinder head 23 which is mounted to thecylinder block 22. Thecylinder head 23 has both asuction chamber 23 a to draw the gas refrigerant into thecompression chamber 22 a and anexhaust chamber 23 b to release the compressed refrigerant from thecompression chamber 22 a to an outside of thehermetic casing 10. The hermetic compressor further includes apiston 24 which is received in thecompression chamber 22 a to execute a rectilinear reciprocating motion in thecompression chamber 22 a. - The hermetic compressor further includes a
valve plate 25. Thevalve plate 25 is interposed between thecylinder block 22 and thecylinder head 23 to control flows of the refrigerant drawn into and discharged from thecompression chamber 22 a. - The
drive unit 30 is placed under thecompression unit 20 in thehermetic casing 10, and includes astator 31 along which an electromagnetic field is generated when electricity is applied to thestator 31. Thedrive unit 30 further includes arotor 32 which rotates by the electromagnetic field generated along thestator 31, and arotating shaft 33 which axially penetrates a center of therotor 32 so as to rotate along with therotor 32. - The rotating
shaft 33 has aneccentric part 34 which is provided at an upper end of the rotatingshaft 33 to eccentrically rotate. Theeccentric part 34 of the rotatingshaft 33 includes abalance weight 34 a to allow the rotatingshaft 33 to rotate while keeping balance thereof regardless of theeccentric part 34, and aneccentric shaft 34 b which extends upward from thebalance weight 34 a to a predetermined length and eccentrically rotates during a rotation of the rotatingshaft 33. Thepiston 24 is connected to theeccentric shaft 34 b of theeccentric part 34 through a connectingrod 35, so that the eccentric rotation of theeccentric shaft 34 b is converted into a rectilinear reciprocation of thepiston 24 by the connectingrod 35. Therefore, when theeccentric part 34 rotates along with therotating shaft 33, thepiston 24 rectilinearly reciprocates in thecompression chamber 22 a. The rotatingshaft 33 is set in abore 21 a of theframe 21. Theframe 21 has anannular bearing seat 40 around an upper end of thebore 21 a, and a thrust bearing 50 is seated in thebearing seat 40 of theframe 21, thus supporting theeccentric part 34 of the rotatingshaft 33. The thrust bearing 50 includes a plurality ofballs 51 which are supported between upper andlower races - The rotating
shaft 33 has anoil path 33 a. Theoil path 33 a extends through the rotatingshaft 33 from a lower end of the rotatingshaft 33 to theeccentric shaft 34 b, thus drawing and guiding oil L to theeccentric shaft 34 b. The rotatingshaft 33 further includes aspiral oil groove 33 b. Thespiral oil groove 33 b is formed around an outer surface of the rotatingshaft 33 from a position where the rotatingshaft 33 is in sliding contact with theframe 21. Thespiral oil groove 33 b communicates with theoil path 33 a via both anoil suction hole 33 d and anoil discharge hole 33 c which are respectively provided at upper and lower ends of thespiral oil groove 33 b. - Therefore, the oil L is drawn from a bottom of the
hermetic casing 10 into theoil path 33 a of therotating shaft 33, and flows upward to a predetermined height along theoil path 33 a, prior to being discharged from theoil path 33 a to thespiral oil groove 33 b through theoil discharge hole 33 c. The discharged oil, thereafter, flows along thespiral oil groove 33 b, thus forming lubrication layers in the junction gaps between therotating shaft 33 and theframe 21 and between therotating shaft 33 and thethrust bearing 50. - The hermetic compressor of the present invention further includes a plurality of
oil slots 43 which are formed on the bearingseat 40 while being spaced apart from each other at regular angular intervals, as shown inFIG. 2 . - The bearing
seat 40 includes anannular bottom surface 41, with an annularinclined surface 42 which is formed around theannular bottom surface 41 while being inclined upward and outward. Thus, a diameter of the annularinclined surface 42 gradually increases in an outward direction from an inside edge to an outside edge of the annularinclined surface 42. Each of theoil slots 43 extends from a predetermined portion of the annularinclined surface 42 to an edge of the upper end of thebore 21 a, so that each of theoil slots 43 has an upperextension slot part 45 with an oil outlet and a lowerextension slot part 44 with an oil inlet. - Due to the plurality of
oil slots 43, the oil L flows under a lower surface of thethrust bearing 50, thus the oil L hydraulically supports thelower race 53 of thethrust bearing 50. - In the present invention, shapes of the
oil slots 43 may be alternately designed without affecting the functioning of the invention, as shown inFIGS. 3, 4 and 5. - In a first embodiment of the present invention, the
oil slots 43 are formed on the bearingseat 40 such that each of theoil slots 43 extends in a radial direction while having a constant width, as shown inFIG. 3 . In a second embodiment of the present invention, theoil slots 43 are formed to respectively have widenedoil inlets 43 a, as shown inFIG. 4 . In a third embodiment of the present invention, theoil slots 43 are shaped in a helical manner, with a width of each of theoil slots 43 gradually reducing in a direction from theoil inlet 43 a to theoil outlet 43 b, as shown inFIG. 5 . In the second and third embodiments of the present invention, the oil L is smoothly introduced into theoil slots 43, during an operation of the hermetic compressor. - The operation and effect of the hermetic compressor according to the present invention will be described herein below.
- When the hermetic compressor is powered on, an electromagnetic field is generated along the
stator 31, and therotor 32 rotates by the electromagnetic field generated along thestator 31. In the above state, the rotatingshaft 33 that axially penetrates the center of therotor 32 rotates along with therotor 32. Because thepiston 24 is connected to theeccentric shaft 34 b of theeccentric part 34 through the connectingrod 35, thepiston 24 rectilinearly reciprocates within thecompression chamber 22 a by the rotation of therotating shaft 33, thus drawing the refrigerant into thecompression chamber 22 a and compressing the refrigerant, prior to discharging the refrigerant from thecompression chamber 22 a. - During the rotation of the
rotating shaft 33, the oil L flows upward along theoil path 33 a of therotating shaft 33. In the above state, a part of the oil L is discharged from theoil path 33 a to thespiral oil groove 33 b through theoil discharge hole 33 c. The discharged oil, thereafter, flows along thespiral oil groove 33 b while lubricating the rotatingshaft 33 and thethrust bearing 50. The oil L further flows through the plurality ofoil slots 43 which are placed under the lower surface of thethrust bearing 50, thus the oil L hydraulically supports thelower race 53 of the thrust bearing 50 upward. - Therefore, even when an impact is applied to the
rotating shaft 33 during a refrigerant compressing operation of thepiston 24 in thecompression chamber 22 a, the impact load imposed on thethrust bearing 50 is evenly distributed along a junction between thelower race 53 and the allballs 51 of thethrust bearing 50, because the oil L hydraulically supports thelower race 53 of the thrust bearing 50 upward. Thethrust bearing 50 thus smoothly rotates and thereby effectively supports the rotation of theeccentric part 34 of therotating shaft 33. - The hermetic compressor of the present invention thus reduces vibration of the
balls 51 and thelower race 53 of thethrust bearing 50, and attenuates noise caused by the vibration. The hermetic compressor further has improved operational efficiency. - As apparent from the above description, the present invention provides a hermetic compressor, in which a plurality of oil slots are formed on a bearing seat that seats a thrust bearing therein. During an operation of the hermetic compressor, oil flows through the plurality of oil slots while hydraulically supporting a lower surface of the thrust bearing upward.
- Therefore, even when an impact is applied from a piston to a rotating shaft during a refrigerant compressing operation of the piston in a compression chamber, the impact load imposed on the thrust bearing is evenly distributed along a junction between a lower race and all balls of the thrust bearing, because the oil hydraulically supports the lower race of the thrust bearing upward. The thrust bearing thus smoothly rotates and effectively supports the rotation of an eccentric part of the rotating shaft. Therefore, the hermetic compressor of the present invention reduces vibration of the balls and the lower race of the thrust bearing, and attenuates noise caused by the vibration. The hermetic compressor further has improved operational efficiency.
- Although a few preferred embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
Claims (7)
1. A hermetic compressor, comprising:
a hollow frame;
a rotating shaft placed in a hollowed part of the frame so as to rotate relative to the frame;
an eccentric part provided on the rotating shaft so as to eccentrically rotate;
a piston to rectilinearly move, in response to an eccentric rotation of the eccentric part;
a cylinder provided on an upper end of the hollow frame so as to allow the piston to compress a fluid in the cylinder;
a bearing seat provided on an upper end of the hollowed part of the frame;
a thrust bearing seated in the bearing seat so as to support the eccentric part;
an oil path provided in the rotating shaft so as to guide oil upward;
an oil discharge hole to communicate with the oil path, thus discharging the oil to an outer surface of the rotating shaft; and
an oil slot provided in the bearing seat, thus allowing the oil discharged from the oil discharge hole to flow through the oil slot.
2. The hermetic compressor according to claim 1 , wherein the oil slot extends on a bottom surface of the bearing seat in a radial direction.
3. The hermetic compressor according to claim 2 , wherein the bearing seat comprises an inclined surface which is formed around the bottom surface of the bearing seat while being inclined upward and outward, with a diameter of the inclined surface increasing in an outward direction from an inside edge to an outside edge of the inclined surface.
4. The hermetic compressor according to claim 3 , wherein the oil slot extends to the inclined surface of the bearing seat and to an edge of the hollowed part of the frame, thus having extension slot parts with predetermined lengths.
5. The hermetic compressor according to claim 2 , wherein the oil slot comprises a plurality of oil slots which are formed on the bearing seat while being spaced apart from each other at predetermined angular intervals.
6. The hermetic compressor according to claim 2 , wherein the oil slot is widened at an oil inlet of the oil slot.
7. The hermetic compressor according to claim 2 , wherein the oil slot is shaped in a helical manner, with a width of the oil slot reducing in a direction from an oil inlet to an oil outlet of the oil slot.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2003-0075214A KR100538522B1 (en) | 2003-10-27 | 2003-10-27 | Hermetic Compressor |
KR2003-75214 | 2003-10-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050089416A1 true US20050089416A1 (en) | 2005-04-28 |
Family
ID=34511112
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/781,300 Abandoned US20050089416A1 (en) | 2003-10-27 | 2004-02-18 | Hermetic compressor |
Country Status (6)
Country | Link |
---|---|
US (1) | US20050089416A1 (en) |
JP (1) | JP3965393B2 (en) |
KR (1) | KR100538522B1 (en) |
CN (1) | CN1611788A (en) |
BR (1) | BRPI0400839A (en) |
IT (1) | ITRM20040096A1 (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050008502A1 (en) * | 2001-08-31 | 2005-01-13 | Manke Adilson Luiz | Axial bearing arrangement for a hermetic compressor |
WO2007061103A1 (en) * | 2005-11-22 | 2007-05-31 | Matsushita Electric Industrial Co., Ltd. | Hermetic compressor |
WO2007063077A1 (en) * | 2005-11-30 | 2007-06-07 | Arcelik Anonim Sirketi | A compressor |
WO2008102517A1 (en) * | 2007-02-23 | 2008-08-28 | Panasonic Corporation | Hermetic compressor |
WO2008132775A1 (en) * | 2007-04-25 | 2008-11-06 | Panasonic Corporation | Hermetic reciprocating compressor with thrust ball bearing |
US20090068035A1 (en) * | 2007-08-16 | 2009-03-12 | Danfoss Compressors Gmbh | Refrigerant compressor arrangement |
WO2009054099A1 (en) * | 2007-10-25 | 2009-04-30 | Panasonic Corporation | Compressor |
WO2009139138A1 (en) * | 2008-05-12 | 2009-11-19 | Panasonic Corporation | Closed type compressor and freezing apparatus using the same |
US20100158721A1 (en) * | 2006-12-01 | 2010-06-24 | Matsushita Electric Industrial Co., Ltd. | Hermetic compressor and method of manufacturing the same |
WO2011022799A1 (en) * | 2009-08-27 | 2011-03-03 | Whirpool S.A. | Block for a reciprocating refrigeration compressor |
US20110200462A1 (en) * | 2008-10-27 | 2011-08-18 | Panasonic Corporation | Sealed compressor |
US20110250083A1 (en) * | 2008-10-28 | 2011-10-13 | Lg Electronics Inc. | Linear compressor |
CN105673456A (en) * | 2016-01-11 | 2016-06-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Cylinder seat, compressor and machining method for cylinder seat |
US9617986B2 (en) | 2012-06-13 | 2017-04-11 | Panasonic Intellectual Property Management Co., Ltd. | Hermetic compressor |
US11536258B2 (en) * | 2018-10-22 | 2022-12-27 | Lg Electronics Inc. | Compressor including cylinder block corresponding to outer rotor type motor |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100598021B1 (en) | 2005-06-16 | 2006-07-13 | 삼성광주전자 주식회사 | Hermetic compressor |
JP4687581B2 (en) * | 2006-06-23 | 2011-05-25 | パナソニック株式会社 | Hermetic compressor |
JP4687605B2 (en) * | 2006-08-03 | 2011-05-25 | パナソニック株式会社 | Hermetic compressor |
JP4687634B2 (en) * | 2006-11-15 | 2011-05-25 | パナソニック株式会社 | Hermetic compressor |
JP5040488B2 (en) * | 2007-07-12 | 2012-10-03 | パナソニック株式会社 | Hermetic compressor |
KR101451660B1 (en) * | 2008-06-02 | 2014-10-16 | 엘지전자 주식회사 | Friction reduce device for hermetic compressor |
CN102364100B (en) * | 2011-11-11 | 2015-01-07 | 黄石东贝电器股份有限公司 | Axial thrust bearing supporting structure for crankshaft of refrigeration compressor |
CN108591015A (en) * | 2017-12-25 | 2018-09-28 | 珠海格力节能环保制冷技术研究中心有限公司 | Pump assembly, piston compressor and heat-exchange system for piston compressor |
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US4325679A (en) * | 1980-07-22 | 1982-04-20 | White Consolidated Industries, Inc. | Oil pump for hermetic compressor |
US4717263A (en) * | 1985-07-26 | 1988-01-05 | Compact Spindle Bearing Corporation | Gas bearing |
US4772188A (en) * | 1986-05-15 | 1988-09-20 | Mitsubishi Denki Kabushiki Kaisha | Scroll compressor with oil grooves in thrust bearing |
US5857780A (en) * | 1997-05-22 | 1999-01-12 | Emerson Electric Co. | Self-aligning/rigid spherical bearing assembly |
US6152640A (en) * | 1997-12-12 | 2000-11-28 | Kabushiki Kaisha Somic Ishikawa | Ball joint |
US6419049B1 (en) * | 1999-06-25 | 2002-07-16 | Samsung Kwangju Electronics Co., Ltd. | Main shaft bearing lubricating apparatus for sealing-type reciprocating compressor |
US6702067B2 (en) * | 2000-10-28 | 2004-03-09 | Danfoss Compressors Gmbh | Piston compressor, particularly hermetically enclosed refrigerant compressor |
US6948418B2 (en) * | 2003-05-09 | 2005-09-27 | Samsung Gwangju Electronics Co., Ltd. | Hermetic reciprocating compressor |
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- 2003-10-27 KR KR10-2003-0075214A patent/KR100538522B1/en not_active IP Right Cessation
-
2004
- 2004-02-18 US US10/781,300 patent/US20050089416A1/en not_active Abandoned
- 2004-02-24 IT IT000096A patent/ITRM20040096A1/en unknown
- 2004-03-01 JP JP2004055827A patent/JP3965393B2/en not_active Expired - Fee Related
- 2004-03-03 BR BR0400839-1A patent/BRPI0400839A/en not_active Application Discontinuation
- 2004-03-04 CN CNA2004100074656A patent/CN1611788A/en active Pending
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Publication number | Priority date | Publication date | Assignee | Title |
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US3674382A (en) * | 1970-06-25 | 1972-07-04 | Tokyo Shibaura Electric Co | Hermetically sealed electric compressor |
US4325679A (en) * | 1980-07-22 | 1982-04-20 | White Consolidated Industries, Inc. | Oil pump for hermetic compressor |
US4717263A (en) * | 1985-07-26 | 1988-01-05 | Compact Spindle Bearing Corporation | Gas bearing |
US4772188A (en) * | 1986-05-15 | 1988-09-20 | Mitsubishi Denki Kabushiki Kaisha | Scroll compressor with oil grooves in thrust bearing |
US5857780A (en) * | 1997-05-22 | 1999-01-12 | Emerson Electric Co. | Self-aligning/rigid spherical bearing assembly |
US6152640A (en) * | 1997-12-12 | 2000-11-28 | Kabushiki Kaisha Somic Ishikawa | Ball joint |
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US6948418B2 (en) * | 2003-05-09 | 2005-09-27 | Samsung Gwangju Electronics Co., Ltd. | Hermetic reciprocating compressor |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7137791B2 (en) * | 2001-08-31 | 2006-11-21 | Empresa Brasileira De Compressores S.A. | Axial bearing arrangement for a hermetic compressor |
US20050008502A1 (en) * | 2001-08-31 | 2005-01-13 | Manke Adilson Luiz | Axial bearing arrangement for a hermetic compressor |
WO2007061103A1 (en) * | 2005-11-22 | 2007-05-31 | Matsushita Electric Industrial Co., Ltd. | Hermetic compressor |
US20090136369A1 (en) * | 2005-11-22 | 2009-05-28 | Matsushita Electric Industrial Co., Ltd. | Hermetic compressor |
WO2007063077A1 (en) * | 2005-11-30 | 2007-06-07 | Arcelik Anonim Sirketi | A compressor |
US20100158721A1 (en) * | 2006-12-01 | 2010-06-24 | Matsushita Electric Industrial Co., Ltd. | Hermetic compressor and method of manufacturing the same |
WO2008102517A1 (en) * | 2007-02-23 | 2008-08-28 | Panasonic Corporation | Hermetic compressor |
US20100221129A1 (en) * | 2007-02-23 | 2010-09-02 | Seigo Yanase | Hermetic compressor |
WO2008132775A1 (en) * | 2007-04-25 | 2008-11-06 | Panasonic Corporation | Hermetic reciprocating compressor with thrust ball bearing |
US20090116982A1 (en) * | 2007-04-25 | 2009-05-07 | Kosuke Tsuboi | Hermetic reciprocating compressor with thrust ball bearing |
US20090068035A1 (en) * | 2007-08-16 | 2009-03-12 | Danfoss Compressors Gmbh | Refrigerant compressor arrangement |
US8348638B2 (en) | 2007-10-25 | 2013-01-08 | Panasonic Corporation | Compressor |
WO2009054099A1 (en) * | 2007-10-25 | 2009-04-30 | Panasonic Corporation | Compressor |
US20100047093A1 (en) * | 2007-10-25 | 2010-02-25 | Panasonic Corporation | Compressor |
WO2009139138A1 (en) * | 2008-05-12 | 2009-11-19 | Panasonic Corporation | Closed type compressor and freezing apparatus using the same |
US8721304B2 (en) * | 2008-10-27 | 2014-05-13 | Panasonic Corporation | Sealed compressor |
US20110200462A1 (en) * | 2008-10-27 | 2011-08-18 | Panasonic Corporation | Sealed compressor |
US20110250083A1 (en) * | 2008-10-28 | 2011-10-13 | Lg Electronics Inc. | Linear compressor |
CN102483051A (en) * | 2009-08-27 | 2012-05-30 | 惠而浦股份有限公司 | Block for a reciprocating refrigeration compressor |
WO2011022799A1 (en) * | 2009-08-27 | 2011-03-03 | Whirpool S.A. | Block for a reciprocating refrigeration compressor |
US9109588B2 (en) | 2009-08-27 | 2015-08-18 | Whirlpool S.A. | Block for a reciprocating refrigeration compressor |
US9617986B2 (en) | 2012-06-13 | 2017-04-11 | Panasonic Intellectual Property Management Co., Ltd. | Hermetic compressor |
CN105673456A (en) * | 2016-01-11 | 2016-06-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Cylinder seat, compressor and machining method for cylinder seat |
US11536258B2 (en) * | 2018-10-22 | 2022-12-27 | Lg Electronics Inc. | Compressor including cylinder block corresponding to outer rotor type motor |
Also Published As
Publication number | Publication date |
---|---|
KR100538522B1 (en) | 2005-12-23 |
BRPI0400839A (en) | 2005-06-21 |
JP3965393B2 (en) | 2007-08-29 |
KR20050040158A (en) | 2005-05-03 |
CN1611788A (en) | 2005-05-04 |
JP2005127305A (en) | 2005-05-19 |
ITRM20040096A1 (en) | 2004-05-24 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: SAMSUNG GWANG JU ELECTRONICS CO., LTD., KOREA, REP Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LEE, SUNG TAE;REEL/FRAME:015011/0456 Effective date: 20040202 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |