WO2014038163A1 - 密閉型圧縮機 - Google Patents
密閉型圧縮機 Download PDFInfo
- Publication number
- WO2014038163A1 WO2014038163A1 PCT/JP2013/005122 JP2013005122W WO2014038163A1 WO 2014038163 A1 WO2014038163 A1 WO 2014038163A1 JP 2013005122 W JP2013005122 W JP 2013005122W WO 2014038163 A1 WO2014038163 A1 WO 2014038163A1
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- WIPO (PCT)
- Prior art keywords
- race
- hermetic compressor
- thin plate
- main
- thrust
- Prior art date
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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
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
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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
- F04B39/0005—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 adaptations of pistons
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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
- F04B39/0094—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 crankshaft
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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
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/122—Cylinder block
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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
- F04B39/128—Crankcases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
- F16C27/08—Elastic or yielding bearings or bearing supports, for exclusively rotary movement primarily for axial load, e.g. for vertically-arranged shafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
- F16C33/664—Retaining the liquid in or near the bearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/10—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for axial load mainly
Definitions
- the present invention relates to a hermetic compressor used in a refrigeration cycle system such as a refrigerator-freezer.
- FIG. 8 is an enlarged view of a part of the bearing device disclosed in Patent Document 1.
- FIG. 9 is a perspective view showing a support member of the bearing device shown in FIG. In FIG. 8, the vertical direction in the bearing device is shown as the vertical direction in the figure.
- the radial bearing hub 26 has an upper tubular extension 62 that supports the extension of the crankshaft 20.
- An axial rolling bearing 76 is attached outside the upper tubular extension 62.
- the axial rolling bearing 76 includes a circular cage 68 including a plurality of balls 66, and the plurality of balls 66 are supported by an upper annular race 64 and a lower annular race 70.
- the upper annular race 64 is seated on the surface of the peripheral flange 74 of the crankshaft 20.
- a support member 80 is disposed between the lower surface of the lower annular race 70 and the upper annular surface 60 of the radial bearing hub 26.
- the support member 80 is configured to be capable of vibrating with respect to each of the lower annular race 70 and the upper annular surface 60 of the radial bearing hub 26.
- the support member 80 is formed in an annular shape and has a pair of main surfaces (upper surface and lower surface). On the upper surface of the support member 80, a pair of upper contact surfaces 80a projecting upward from the upper surface is formed. In addition, a pair of lower contact surfaces 80 b projecting downward from the lower surface is formed on the lower surface of the support member 80.
- the upper contact surface 80a and the lower contact surface 80b are formed so as to be shifted by 90 degrees with respect to the axial direction of the crankshaft 20, respectively.
- the support member 80 is arranged so that the upper contact surface 80a and the lower surface of the lower annular race 70 are in contact with each other, and the lower contact surface 80b and the upper annular surface 60 of the radial bearing hub 26 are in contact with each other.
- a space (gap) is formed between a portion of the lower surface of the support member 80 facing (corresponding to) the upper contact surface 80 a and the upper annular surface 60 of the radial bearing hub 26.
- a space (gap) is formed between a portion of the upper surface of the support member 80 facing (corresponding to) the lower contact surface 80 b and the lower surface of the lower annular race 70. That is, the support member 80 is formed in a wave shape when viewed from the horizontal direction.
- the support member 80 can elastically support the axial rolling bearing 76.
- the present invention solves the above-described conventional problems, and even when high-speed operation is performed at a frequency exceeding the commercial power supply frequency, the shaft can be prevented from resonating in the vertical direction, and is a sealed type with low noise and vibration.
- An object is to provide a compressor.
- a hermetic compressor includes an electric element including a stator and a rotor, a compression element driven by the electric element, and the electric element and the compression element.
- a thrust rolling bearing disposed on a thrust surface of the upper race, and the thrust rolling bearing includes an upper race, a lower race, and a holder portion arranged between the upper race and the lower race.
- a plurality of rolling elements held by the holder portion, and main surfaces of the upper race and the lower race facing each other are provided with raceways formed from annular grooves, the upper race and the The rolling element is disposed on the race ring of the lower race, and an annular flat thin plate is disposed between the lower race and the thrust surface of the main bearing.
- the lubricating oil permeates between the thrust surface of the main bearing and the thin plate, and between the lower race and the thin plate, thereby avoiding the shaft from resonating in the vertical direction due to the damping effect of the lubricating oil film. be able to.
- the shaft can be prevented from resonating in the vertical direction, so that generation of noise and vibration can be suppressed.
- FIG. 1 is a longitudinal sectional view of a hermetic compressor according to the first embodiment.
- FIG. 2 is an enlarged schematic view of the main part of the hermetic compressor shown in FIG.
- FIG. 3 is an enlarged schematic view of the main part of the thrust rolling bearing of the hermetic compressor shown in FIG.
- FIG. 4 is an enlarged schematic view of a main part of the hermetic compressor according to the second embodiment.
- FIG. 5 is an enlarged schematic view of the main part of the hermetic compressor according to the third embodiment.
- FIG. 6 is a longitudinal sectional view of the hermetic compressor according to the fourth embodiment.
- FIG. 7 is an enlarged schematic view of the main part of the hermetic compressor shown in FIG.
- FIG. 8 is an enlarged view of a part of the bearing device disclosed in Patent Document 1.
- FIG. 9 is a perspective view showing a support member of the bearing device shown in FIG.
- a hermetic compressor includes an electric element including a stator and a rotor, a compression element driven by the electric element, the electric element and the compression element, and lubricating oil for lubricating the compression element is stored.
- the compression element includes a shaft having a main shaft portion to which a rotor is fixed and an eccentric shaft portion, a cylinder block having a compression chamber, a piston reciprocating in the compression chamber, and a piston And the eccentric shaft portion, a main bearing provided on the cylinder block for supporting the main shaft portion, and a thrust rolling bearing disposed on a thrust surface of the main bearing, the thrust rolling bearing is An upper race, a lower race, a holder portion disposed between the upper race and the lower race, and a plurality of rolling elements held by the holder portion, the main surfaces of the upper race and the lower race facing each other In A raceway formed by an annular groove is provided, and rolling elements are disposed on the raceways of the upper race and the lower race, and an annular flat shape is provided
- a plurality of thin plates may be disposed between the lower race and the thrust surface of the main bearing.
- the thin plate may include at least one metal among a metal group consisting of iron, copper, and aluminum.
- the thickness of the thin plate may be 1/5 or less of the thickness of the lower race.
- the thickness of the thin plate may be 0.1 mm or more and 0.2 mm or less.
- the flatness of the main surface in contact with the thrust surface in the thin plate may be smaller than the flatness of the thrust surface.
- the shaft is provided with a flange surface so as to face the other main surface of the upper race, and between the flange surface of the shaft and the other main surface of the upper race.
- a thin plate may be provided.
- FIG. 1 is a longitudinal sectional view of a hermetic compressor according to the first embodiment.
- FIG. 2 is an enlarged schematic view of the main part of the hermetic compressor shown in FIG.
- FIG. 3 is an enlarged schematic view of the main part of the thrust rolling bearing of the hermetic compressor shown in FIG. 1 to 3, the vertical direction of the hermetic compressor is shown as the vertical direction in the drawings.
- the hermetic compressor 100 stores lubricating oil 104 in the inner bottom portion of the hermetic container 102, and the compressor body 106 is closed by the suspension spring 108. Suspended within.
- the sealed container 102 is filled with, for example, R600a (isobutane), which is a refrigerant having a low global warming potential.
- R600a isobutane
- the compressor main body 106 includes an electric element 110 and a compression element 112 driven by the electric element 110.
- a power supply terminal 113 for supplying power to the electric element 110 is attached to the sealed container 102.
- the power supply terminal 113 is electrically connected to the inverter device 200 via the lead wire 201.
- a commercial power source 203 is electrically connected to the inverter device 200 via an electric wire 202.
- the inverter device 200 is configured to inverter-control the electric power supplied to the electric element 110 via the power supply terminal 113.
- the electric element 110 can be driven at a plurality of operating frequencies, and can rotate at a high speed, for example, at a frequency exceeding the commercial power supply frequency.
- the electric element 110 includes a stator 114 formed by winding a copper winding around an iron core in which thin plates are laminated, and a rotor 116 disposed on the inner diameter side of the stator 114.
- the compression element 112 is disposed above the electric element 110.
- the compression element 112 includes a shaft 118, a cylinder block 124, a piston 130, a connecting portion (connecting means) 136, and a thrust ball bearing (thrust rolling bearing) 176.
- the shaft 118 includes a main shaft portion 120 and an eccentric shaft portion 122 having an axis parallel to the axis of the main shaft portion 120. Further, the main shaft portion 120 and the eccentric shaft portion 122 are connected by a connecting portion 121.
- the connecting portion 121 has a flange surface 174 formed so as to be substantially perpendicular to the axis of the main shaft portion 120.
- a rotor 116 is fixed to the main shaft portion 120, and the main shaft portion 120 and the rotor 116 constitute a shaft assembly 118a. Further, the lower end of the shaft 118 is immersed in the lubricating oil 104, and the shaft 118 includes an oil supply mechanism 128 including a spiral groove 128 a provided on the surface of the main shaft portion 120.
- the cylinder block 124 is provided with a through hole extending in the vertical direction, and the through hole constitutes a lubricating oil discharge hole 177.
- the lubricating oil 104 supplied from the oil supply mechanism 128 to the shaft 118 and the like is discharged downward from the lubricating oil discharge hole 177.
- the cylinder block 124 includes a cylinder 134 that is a cylindrical hole, and a piston 130 is reciprocally inserted into the cylinder 134.
- the cylinder 134 and the piston 130 form a compression chamber 148.
- the shaft 118 and the piston 130 are connected by a connecting portion 136.
- the holes provided at both ends of the connecting portion 136 are respectively inserted into the piston pin 138 and the eccentric shaft portion 122 attached to the piston 130, thereby connecting the eccentric shaft portion 122 and the piston 130 to each other. is doing.
- a valve plate 146 is attached to the end surface of the cylinder 134.
- the cylinder head 150 is fixed so as to cover the valve plate 146 and cover it.
- a suction muffler 152 is disposed between the valve plate 146 and the cylinder head 150.
- the suction muffler 152 is molded from a resin such as PBT (polybutylene terephthalate), and a sound deadening space is formed inside.
- the cylinder block 124 includes a main bearing 126 having a cylindrical inner surface, and the main shaft portion 120 of the shaft 118 is rotatably inserted into and supported by the main bearing 126.
- the compression element 112 has a configuration of a cantilever bearing that supports the load acting on the eccentric shaft portion 122 by the main shaft portion 120 and the main bearing 126 arranged below the eccentric shaft portion 122.
- a thrust ball bearing 176 is interposed between the flange surface 174 of the shaft 118 and the main bearing 126 of the cylinder block 124. Thereby, the rotation of the shaft 118 is smoothed by the thrust ball bearing 176.
- the flange surface 174 is formed in a substantially circular shape with the main shaft portion 120 as the center when viewed from below.
- the connecting portion 121 of the shaft 118 is formed in a thick and substantially disk shape.
- the main shaft portion 120 is formed on the lower main surface of the connecting portion 121 so that the main shaft portion 120 extends downward from the center portion thereof, and the eccentric shaft portion 122 is formed on the upper main surface of the connecting portion 121 from the periphery thereof. Is formed to extend upward.
- the thrust surface 160 is formed on the main bearing 126 of the cylinder block 124 so as to be substantially perpendicular to the axis of the main bearing 126.
- the thrust surface 160 is formed in an annular shape when viewed from the vertical direction.
- a cylindrical tubular extension 162 is disposed on the inner peripheral portion of the thrust surface 160 so as to protrude upward from the thrust surface 160.
- the inner peripheral surface of the tubular extension 162 is formed to face the outer peripheral surface of the main shaft portion 120.
- the thrust ball bearing 176 includes an annular upper race 164, a plurality of balls (rolling elements) 166, an annular holder portion 168 that holds the balls 166, and an annular lower race 170.
- Each member constituting the thrust ball bearing 176 is arranged in the order of the lower race 170, the holder portion 168, and the upper race 164 from the thrust surface 160 to the upper side. More specifically, the lower race 170 and the holder portion 168 are arranged so that the tubular extension 162 is inserted through the center hole thereof. The upper race 164 is positioned above the tubular extension 162 and is disposed so that the main shaft 120 is inserted through the center hole thereof. An axial gap 178 is formed between the tubular extension 162 and the thrust ball bearing 176.
- the upper race 164 and the lower race 170 each have a pair of main surfaces.
- An annular groove is formed on the main surface (track surface) of the upper race 164 and the lower race 170 facing each other, and the groove constitutes a race ring 179.
- the race ring 179 is formed in an arc shape so that the cross-sectional shape is similar to the contour shape of the ball 166.
- the race 179 is formed by press forging or machining, and swells due to machining accuracy occur.
- the thrust ball bearing 176 is disposed between the flange surface 174 and the thrust surface 160, and the upper surface of the upper race 164 and the flange surface 174 are in contact with each other.
- An annular (annular) thin plate 180 having a central hole is disposed between the lower surface of the lower race 170 and the thrust surface 160. More specifically, the thin plate 180 is disposed so as to overlap the center of the revolution trajectory of the ball 166 when viewed in the vertical direction.
- the thin plate 180 is configured to include at least one metal among a metal group composed of iron, copper, and aluminum.
- the thin plate 180 may be comprised by SPCC (cold-rolled steel plate), for example, and may use a shim ring.
- the thin plate 180 may be formed so that the thickness thereof is 1/5 or less of the thickness of the lower race 170, and is formed so as to be 0.1 mm or more and 0.2 mm or less. Also good. If the thickness of the thin plate 180 is 0.1 mm or more, sufficient rigidity can be secured, and if it is 0.2 mm or less, even with the existing hermetic compressor 100, without changing the design, A thin plate 180 can be arranged.
- the length in the width direction of the thin plate 180 (half the difference between the outer diameter and the inner diameter) is larger than the dimension in the width direction of the race 179 from the viewpoint of suppressing the vertical resonance of the shaft 118. It may be less than the dimension of the thrust surface 160 in the width direction from the viewpoint of arrangement on the thrust surface 160.
- the thin plate 180 is formed so that its inner diameter is larger than the outer diameter of the tubular extension 162 and smaller than the outer diameter of the thrust surface 160 from the viewpoint of disposing it on the thrust surface 160.
- the thin plate 180 is formed so that its inner diameter is larger than the outer diameter of the main shaft portion 120.
- the thin plate 180 is formed so that the flatness of the pair of main surfaces is smaller than the flatness of the thrust surface 160, and the respective main surfaces are substantially parallel to each other.
- the pair of main surfaces of the thin plate 180 is not formed with swells (bends) like a wave washer.
- the flatness means an interval between two planes when the interval between the two parallel planes is minimized when the target plane is sandwiched between two geometrically correct parallel planes.
- the thrust surface 160 is formed with a surface having a flatness of about 50 ⁇ m or less by machining. For this reason, a fine gap 181 is formed on the entire surface between the thrust surface 160 and the lower surface of the thin plate 180. Similarly, a fine gap 182 is formed on the entire surface between the lower surface of the lower race 170 and the upper surface of the thin plate 180. Then, the lubricating oil 104 penetrates into the gaps 181 and 182 to form an oil film.
- the entire lower surface of the thin plate 180 is in contact with the thrust surface 160 via the oil film, and the upper surface of the thin plate 180 is in contact with the lower surface of the lower race 170 via the oil film.
- the whole oil film of the lubricating oil 104 existing in the gap 181 and the gap 182 functions as an oil damper.
- the oil film formed in the gap 181 and the gap 182 applies the lubricating oil 104 to the thin plate 180 or the like when the thin plate 180 and the thrust ball bearing 176 are disposed on the main bearing 126 in the manufacturing process of the hermetic compressor 100. By that, it is formed.
- the inverter device 200 supplies the power supplied from the commercial power supply 203 to the stator 114 of the electric element 110 via the lead wire 201 and the power supply terminal 113 and the like. As a result, a magnetic field is generated in the stator 114 and the rotor 116 rotates, whereby the main shaft portion 120 of the shaft 118 fixed to the rotor 116 rotates.
- the eccentric rotation of the eccentric shaft portion 122 accompanying the rotation of the main shaft portion 120 is converted by the connecting portion 136 and causes the piston 130 to reciprocate within the cylinder 134. Then, when the volume of the compression chamber 148 changes, a compression operation is performed in which the refrigerant in the sealed container 102 is sucked into the compression chamber 148 and compressed.
- the refrigerant in the sealed container 102 is intermittently sucked into the compression chamber 148 through the suction muffler 152 and compressed in the compression chamber 148, and then the high-temperature and high-pressure refrigerant is discharged into the discharge pipe. Etc., and sent to the refrigeration cycle (not shown) from the sealed container 102.
- the lubricating oil 104 is supplied to the main shaft portion 120 by the oil supply mechanism 128 and lubricates the main shaft portion 120. Thereafter, a part of the lubricating oil 104 is supplied to each part of the compression element 112 from the axial gap 178 and lubricates each sliding part, and then is discharged downward from the lubricating oil discharge hole 177 of the cylinder block 124. Is done. Further, another part of the lubricating oil 104 is supplied to the thrust ball bearing 176 from the axial gap 178.
- the lubricating oil 104 supplied to the thrust ball bearing 176 makes the thrust surface 160 rich, and then part of the lubricating oil 104 penetrates into the gap 181 and the gap 182, and the other is discharged downward from the lubricating oil discharge hole 177. Is done.
- a thrust ball bearing 176 is provided in the hermetic compressor 100 according to the first embodiment. For this reason, since the ball 166 rolls between the upper race 164 and the lower race 170, the sliding loss of the shaft 118 can be suppressed, and the torque for rotating the shaft 118 can be reduced. Thereby, the electric power supplied to the electric element 110 can be reduced, and the efficiency of the hermetic compressor 100 can be improved.
- loads such as the shaft 118 and the rotor 116 act on the race 179 via the upper race 164 and the lower race 170.
- the race 179 has undulations due to processing accuracy.
- the ball 166 on the raceway ring 179 is subjected to vibration due to swell.
- This vibration is particularly large during high-speed operation in a hermetic compressor equipped with an inverter motor that rotates at high speed, and the shaft 118 may resonate up and down via the upper race 164 and the lower race 170.
- a flat thin plate 180 is disposed between the lower race 170 and the thrust surface 160.
- the lubricating oil 104 permeates the gap 181 between the thrust surface 160 and the lower surface of the thin plate 180 and the gap 182 between the upper surface of the thin plate 180 and the lower surface of the lower race 170, and the damping effect due to the oil film formed on the entire surface appear.
- the vertical resonance of the shaft 118 can be avoided by the damping effect, and the increase in noise and vibration of the hermetic compressor 100 can be suppressed.
- the support member 80 is disposed between the lower surface of the lower annular race 70 and the upper annular surface 60 of the radial bearing hub 26.
- the member 80 is formed in a wave shape when viewed from the horizontal direction.
- a space (gap) is formed between a portion of the lower surface of the support member 80 facing (corresponding to) the upper contact surface 80a and the upper annular surface 60 of the radial bearing hub 26.
- a space (gap) is formed between a portion of the upper surface of the support member 80 facing (corresponding to) the lower contact surface 80 b and the lower surface of the lower annular race 70.
- the hermetic compressor according to the second embodiment exemplifies a mode in which a plurality of thin plates are disposed between the lower race and the thrust surface of the main bearing.
- FIG. 4 is an enlarged schematic view of a main part of the hermetic compressor according to the second embodiment.
- the vertical direction in the hermetic compressor is shown as the vertical direction in the figure.
- the hermetic compressor 100 according to the second embodiment has the same basic configuration as the hermetic compressor 100 according to the first embodiment, but a plurality of thin plates 180 (here, 3) is different. Specifically, the thin plate 180C, the thin plate 180B, and the thin plate 180A are arranged in this order from the thrust surface 160 to the upper side.
- a gap 184 is formed between the thin plate 180C and the thin plate 180B, and a gap 183 is formed between the thin plate 180B and the thin plate 180A. Then, the lubricating oil 104 penetrates into the gap 183 and the gap 184.
- the hermetic compressor 100 according to the second embodiment a further damping effect is generated as compared with the hermetic compressor 100 according to the first embodiment. This can be avoided more and the noise and vibration increase of the hermetic compressor 100 can be further suppressed.
- the shaft is provided with a flange surface so as to face the other main surface of the upper race, and between the flange surface of the shaft and the other main surface of the upper race. 2 illustrates a mode in which a thin plate is disposed.
- FIG. 5 is an enlarged schematic view of the main part of the hermetic compressor according to the third embodiment.
- the vertical direction in the hermetic compressor is shown as the vertical direction in the figure.
- the hermetic compressor 100 according to the third embodiment has the same basic configuration as the hermetic compressor 100 according to the first embodiment, but the flange surface 174 of the shaft 118 and the upper surface are the same. A difference is that an annular (annular) thin plate 190 having an inner peripheral surface and an outer peripheral surface is disposed between the upper surface of the race 164.
- the thin plate 190 is basically configured in the same manner as the thin plate 180, but the configuration of the inner peripheral surface and the outer peripheral surface thereof is different. Specifically, the thin plate 190 is formed such that the diameter of the inner peripheral surface thereof is larger than the diameter of the outer peripheral surface of the main shaft portion 120 from the viewpoint of not suppressing the rotation of the shaft 118. Further, the outer peripheral surface of the thin plate 190 can be arbitrarily set within a range in which the rotation of the shaft 118 is not suppressed.
- the flange surface 174 of the shaft 118 is formed with a surface having a flatness of about 50 ⁇ m or less by machining. For this reason, a fine gap 185 is formed between the flange surface 174 and the upper surface of the thin plate 190. Similarly, a fine gap is formed between the lower surface of the thin plate 190 and the upper surface of the upper race 164 (not shown). Then, the lubricating oil 104 penetrates into these gaps, and an oil film is formed.
- the hermetic compressor 100 according to the third embodiment compared to the hermetic compressor 100 according to the first embodiment, a further damping effect is generated, so that the shaft 118 can resonate in the vertical direction. This can be avoided more and the noise and vibration increase of the hermetic compressor 100 can be further suppressed.
- the present invention is not limited to this.
- a configuration in which a plurality of thin plates 190 are disposed may be employed.
- the configuration in which one thin plate 180 is disposed is adopted, but the present invention is not limited to this, like the hermetic compressor 100 according to the second embodiment.
- a form in which a plurality of thin plates 180 are disposed may be employed.
- FIG. 6 is a longitudinal sectional view of the hermetic compressor according to the fourth embodiment.
- FIG. 7 is an enlarged schematic view of the main part of the hermetic compressor shown in FIG. 6 and 7, the vertical direction in the hermetic compressor is represented as the vertical direction in the drawings. Moreover, in FIG. 6, illustration of an inverter device and the like is omitted.
- the hermetic compressor 100 according to the fourth embodiment has the same basic configuration as the hermetic compressor 100 according to the first embodiment, but the compression element 112 is electrically operated.
- the point of being arranged below the element 110 is different from the point that the rotor 116 is provided with a flange surface 174.
- the thrust ball bearing 176 is disposed between the flange surface 174 of the rotor 116 and the thrust surface 160 of the main bearing 126.
- the same operational effects as those of the hermetic compressor 100 according to the first embodiment are exhibited.
- the configuration in which one thin plate 180 is disposed is adopted, but the present invention is not limited to this, like the hermetic compressor 100 according to the second embodiment.
- a configuration in which a plurality of thin plates 180 are disposed may be employed, and a configuration in which the thin plates 190 are disposed as in the hermetic compressor 100 according to the third embodiment may be employed.
- the hermetic compressor according to the present invention can prevent the shaft from resonating in the vertical direction even when high-speed operation is performed, and can suppress noise and vibration of the hermetic compressor, such as an air conditioner or a vending machine.
- the present invention can be widely applied to a hermetic compressor used in equipment using the refrigeration cycle.
- crankshaft 26 radial bearing hub 60 upper annular surface 62 upper tubular extension 64 upper annular race 66 ball 68 circular cage 70 lower annular race 74 peripheral flange 76 axial rolling bearing 80 support member 80a upper contact surface 80b lower contact surface 100 sealed type Compressor 102 Airtight container 104 Lubricating oil 106 Compressor body 108 Suspension spring 110 Electric element 112 Compressor element 113 Power supply terminal 114 Stator 116 Rotor 118 Shaft 118a Shaft assembly 120 Main shaft portion 121 Connection portion 122 Eccentric shaft portion 124 Cylinder block 126 Main Bearing 128 Oil supply mechanism 128a Groove 130 Piston 134 Cylinder 136 Connecting portion 138 Piston pin 146 Valve plate 148 Compression chamber 150 Cylinder head 152 Suction muffler 160 Thrust surface 162 Tubular extension 164 Upper race 166 Ball 168 Holder portion 170 Lower race 174 Flange surface 176 Thrust ball bearing 177 Lubricating oil discharge hole 178 Axial clearance 179 Track
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- General Engineering & Computer Science (AREA)
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Abstract
Description
[密閉型圧縮機の構成]
図1は、本実施の形態1に係る密閉型圧縮機の縦断面図である。図2は、図1に示す密閉型圧縮機の要部を拡大した模式図である。図3は、図1に示す密閉型圧縮機のスラスト転がり軸受の要部を拡大した模式図である。なお、図1~図3においては、密閉型圧縮機における上下方向を図における上下方向として表している。
次に、実施の形態1に係る密閉型圧縮機100の動作について、図1~図3を参照しながら説明する。
次に、実施の形態1に係る密閉型圧縮機100の作用効果について、図1~図3を参照しながら説明する。
本実施の形態2に係る密閉型圧縮機は、薄板が、下レースと主軸受のスラスト面の間に複数配設されている態様を例示するものである。
図4は、本実施の形態2に係る密閉型圧縮機の要部を拡大した模式図である。なお、図4においては、密閉型圧縮機における上下方向を図における上下方向として表している。
本実施の形態3に係る密閉型圧縮機は、シャフトには、上レースの他方の主面と対向するようにフランジ面が設けられ、シャフトのフランジ面と上レースの他方の主面との間に薄板が配設されている態様を例示するものである。
図6は、本実施の形態4に係る密閉型圧縮機の縦断面図である。図7は、図6に示す密閉型圧縮機の要部を拡大した模式図である。なお、図6及び図7においては、密閉型圧縮機における上下方向を図における上下方向として表している。また、図6においては、インバータ装置等の図示を省略している。
26 ラジアル軸受ハブ
60 上部環状面
62 上部管状延長部
64 上部環状レース
66 ボール
68 円形ケージ
70 下部環状レース
74 周囲フランジ
76 アキシアル転がり軸受
80 支持部材
80a 上部接触面
80b 下部接触面
100 密閉型圧縮機
102 密閉容器
104 潤滑油
106 圧縮機本体
108 サスペンションスプリング
110 電動要素
112 圧縮要素
113 電源端子
114 固定子
116 回転子
118 シャフト
118a シャフトアッシー
120 主軸部
121 接続部
122 偏心軸部
124 シリンダブロック
126 主軸受
128 給油機構
128a 溝
130 ピストン
134 シリンダ
136 連結部
138 ピストンピン
146 バルブプレート
148 圧縮室
150 シリンダヘッド
152 吸入マフラー
160 スラスト面
162 管状延長部
164 上レース
166 ボール
168 ホルダー部
170 下レース
174 フランジ面
176 スラストボールベアリング
177 潤滑油排出穴
178 軸方向隙間
179 軌道輪
180 薄板
180A 薄板
180B 薄板
180C 薄板
181 隙間
182 隙間
183 隙間
184 隙間
185 隙間
190 薄板
200 インバータ装置
201 リード線
202 電線
203 商用電源
Claims (7)
- 固定子と回転子を備える電動要素と、
前記電動要素によって駆動される圧縮要素と、
前記電動要素と前記圧縮要素が収容され、前記圧縮要素を潤滑する潤滑油が貯留されている密閉容器と、を備え、
前記圧縮要素は、前記回転子が固定された主軸部と偏心軸部とを有するシャフトと、圧縮室を備えたシリンダブロックと、前記圧縮室内で往復運動するピストンと、前記ピストンと前記偏心軸部とを連結する連結部と、前記シリンダブロックに設けられ前記主軸部を軸支する主軸受と、前記主軸受のスラスト面に配設されたスラスト転がり軸受と、を備え、
前記スラスト転がり軸受は、上レースと、下レースと、前記上レース及び前記下レースの間に配置されているホルダー部と、前記ホルダー部に保持された複数の転動体と、を備え、
前記上レースと前記下レースの互いに対向する主面には、環状の溝から形成される軌道輪が設けられ、
前記上レース及び前記下レースの軌道輪には、前記転動体が配置されており、
前記下レースと前記主軸受のスラスト面との間に環状で平坦状の薄板が配設されている、密閉型圧縮機。 - 前記薄板が、下レースと主軸受のスラスト面の間に複数配設されている、請求項1に記載の密閉型圧縮機。
- 前記薄板は、鉄、銅、及びアルミニウムからなる金属群のうち、少なくとも1の金属を含む、請求項1又は2に記載の密閉型圧縮機。
- 前記薄板の厚みが、前記下レースの厚みの1/5以下である、請求項1~3のいずれか1項に記載の密閉型圧縮機。
- 前記薄板の厚みが、0.1mm以上、かつ、0.2mm以下である、請求項1~4のいずれか1項に記載の密閉型圧縮機。
- 前記薄板における前記スラスト面と接触する主面の平面度が、前記スラスト面の平面度よりも小さい、請求項1~5のいずれか1項に記載の密閉型圧縮機。
- 前記シャフトには、前記上レースの他方の主面と対向するようにフランジ面が設けられ、
前記シャフトのフランジ面と前記上レースの他方の主面との間に前記薄板が配設されている、請求項1~6のいずれか1項に記載の密閉型圧縮機。
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CN201380044925.XA CN104603459B (zh) | 2012-09-04 | 2013-08-29 | 密闭型压缩机 |
US14/423,987 US20150211507A1 (en) | 2012-09-04 | 2013-08-29 | Sealed compressor |
JP2014534176A JP6199293B2 (ja) | 2012-09-04 | 2013-08-29 | 密閉型圧縮機 |
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JP2012193776 | 2012-09-04 | ||
JP2012-193776 | 2012-09-04 |
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US (1) | US20150211507A1 (ja) |
JP (1) | JP6199293B2 (ja) |
CN (1) | CN104603459B (ja) |
WO (1) | WO2014038163A1 (ja) |
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WO2015033536A1 (ja) * | 2013-09-03 | 2015-03-12 | パナソニックIpマネジメント株式会社 | 密閉型圧縮機およびそれを搭載した冷蔵庫または冷凍装置 |
US20180100415A9 (en) * | 2015-04-22 | 2018-04-12 | Carrier Corporation | Systems of preventing engine bearing damage |
ES2809377T3 (es) * | 2016-06-03 | 2021-03-04 | Gree Electric Appliances Inc Zhuhai | Rodamiento y acondicionador de aire |
JP6704309B2 (ja) * | 2016-07-27 | 2020-06-03 | 日立グローバルライフソリューションズ株式会社 | 密閉型圧縮機 |
CN111287942B (zh) * | 2018-12-10 | 2022-05-03 | 安徽美芝制冷设备有限公司 | 压缩机 |
CN112523996B (zh) * | 2020-12-05 | 2022-06-21 | 江西泛宇压缩机科技有限公司 | 一种压缩机曲轴 |
CN112539156B (zh) * | 2020-12-05 | 2022-07-08 | 江西泛宇压缩机科技有限公司 | 一种快速上油的压缩机曲轴 |
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US20150211507A1 (en) | 2015-07-30 |
JPWO2014038163A1 (ja) | 2016-08-08 |
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