WO2015128977A1 - テーパランド型スラスト軸受装置、及び、該軸受装置を備えるターボチャージャ - Google Patents
テーパランド型スラスト軸受装置、及び、該軸受装置を備えるターボチャージャ Download PDFInfo
- Publication number
- WO2015128977A1 WO2015128977A1 PCT/JP2014/054798 JP2014054798W WO2015128977A1 WO 2015128977 A1 WO2015128977 A1 WO 2015128977A1 JP 2014054798 W JP2014054798 W JP 2014054798W WO 2015128977 A1 WO2015128977 A1 WO 2015128977A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- land
- hole
- thrust
- bearing device
- recesses
- Prior art date
Links
Images
Classifications
-
- 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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
- F16C33/1075—Wedges, e.g. ramps or lobes, for generating pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
- F01D25/166—Sliding contact bearing
- F01D25/168—Sliding contact bearing for axial load mainly
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
-
- 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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
- F16C17/045—Sliding-contact bearings for exclusively rotary movement for axial load only with grooves in the bearing surface to generate hydrodynamic pressure, e.g. spiral groove thrust bearings
-
- 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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
- F16C17/047—Sliding-contact bearings for exclusively rotary movement for axial load only with fixed wedges to generate hydrodynamic pressure
-
- 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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
- F16C17/18—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with floating brasses or brushing, rotatable at a reduced speed
-
- 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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
- F16C33/107—Grooves for generating pressure
-
- 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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
- F16C33/128—Porous bearings, e.g. bushes of sintered alloy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/40—Application in turbochargers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/10—Two-dimensional
- F05D2250/18—Two-dimensional patterned
- F05D2250/182—Two-dimensional patterned crenellated, notched
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/10—Two-dimensional
- F05D2250/18—Two-dimensional patterned
- F05D2250/183—Two-dimensional patterned zigzag
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/10—Two-dimensional
- F05D2250/19—Two-dimensional machined; miscellaneous
- F05D2250/191—Two-dimensional machined; miscellaneous perforated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/20—Three-dimensional
- F05D2250/29—Three-dimensional machined; miscellaneous
- F05D2250/292—Three-dimensional machined; miscellaneous tapered
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/60—Structure; Surface texture
- F05D2250/61—Structure; Surface texture corrugated
- F05D2250/611—Structure; Surface texture corrugated undulated
-
- 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
- F16C2360/00—Engines or pumps
- F16C2360/23—Gas turbine engines
- F16C2360/24—Turbochargers
Definitions
- the present disclosure relates to a taper land type thrust bearing device and a turbocharger including the bearing device.
- a turbocharger for an automobile includes a turbine and a compressor, and turbine blades of the turbine and an impeller of the compressor are connected via a rotor shaft.
- the rotor shaft is rotatably supported by a thrust bearing that supports an axial load.
- the thrust bearing described in Patent Document 1 is a taper land type thrust bearing, and includes a thrust collar fitted to the rotor shaft, and a thrust member that is penetrated by the rotor shaft and arranged to face the thrust collar. ing.
- the thrust member a plurality of tapered surfaces and a plurality of land surfaces are alternately provided in the circumferential direction in an annular region facing the thrust collar.
- Patent Document 2 describes that dimples are formed on the upper surface of a slide bearing having steps to increase the lubricating film pressure.
- the mechanical loss can be reduced by reducing the length of the land surface in the circumferential direction, that is, the land surface area and the central angle.
- reducing the length of the land surface in the circumferential direction means changing the contour shape of the land surface, and slightly changing the inclination angle of the taper surface to increase the circumferential length of the taper surface. It must be enlarged and high machining accuracy is required. For this reason, especially when the outer diameter of the land surface is small, it is difficult to reduce the circumferential length of the land surface.
- Patent Document 2 it is described that dimples are formed on the upper surface of a slide bearing having a step.
- mechanical loss is reduced by reducing the circumferential length of the land surface.
- an object of at least one embodiment of the present invention is to reduce the land surface area substantially without changing the contour shape of the land surface even if the land surface area is small, and to make the taper land excellent in mechanical efficiency.
- An object of the present invention is to provide a type thrust bearing device and a turbocharger including the bearing device.
- a taper land type thrust bearing device A rotation axis; A flange portion having a first thrust portion, fitted to the rotary shaft; A through-hole penetrated by the rotating shaft, and a thrust member provided around the through-hole and having a second thrust part facing the first thrust part of the flange part,
- One of the first thrust part and the second thrust part is A plurality of land surfaces that are parallel to a plane orthogonal to the axis of the rotation axis and are provided at intervals in the circumferential direction of the through hole; Provided between each of the plurality of land surfaces, connected to a land surface boundary on one side in the circumferential direction of the through hole via a step, and on the other land surface in the circumferential direction of the through hole.
- a taper surface continuously connected to the boundary; And at least one recess provided in each of the plurality of land surfaces.
- the bearing gap between the first thrust portion and the second thrust portion is enlarged in the region where the concave portion is formed, and the area of the land surface is substantially reduced. Can be reduced.
- reducing the substantial area of the land surface mechanical loss is reduced and mechanical efficiency is improved.
- forming the recess is easier than changing the contour shape of the land surface to reduce the area. For this reason, according to this configuration, even if the land surface is small, the substantial area of the land surface can be reduced with high accuracy.
- the plurality of land surfaces are composed of three or more land surfaces,
- the diameter of the outer periphery of the plurality of land surfaces is 15 mm or less,
- the inclination angle of the tapered surface is in the range of 1e-5 ° to 1.0 °.
- the plurality of land surfaces are composed of three or more land surfaces, the diameter of the outer periphery of the land surface is 15 mm or less, and the inclination angle of the taper surface is 1e-5 ° or more and 1.0 ° or less.
- the substantial area of the land surface can be easily reduced without changing the contour shape of the land surface.
- the at least one recess comprises a plurality of recesses. According to this configuration, since the substantial area of the land surface is reduced by the plurality of concave portions, the substantial area of the land surface can be reduced with high accuracy by adjusting the number of the concave portions. .
- the plurality of recesses are composed of a plurality of first recesses arranged along the radial direction of the through hole, In each of the plurality of land surfaces, the plurality of first recesses are located in a region of 10% or more and 20% or less at a central angle from the boundary of the land surface, Each of the plurality of first recesses has a depth in the range of 0.001 mm to 0.025 mm. According to this configuration, since the first recesses arranged in the radial direction in a predetermined region near the boundary have a depth in the range of 0.001 mm or more and 0.025 mm or less, the first recesses substantially reduce the land surface. A reliable area can be surely reduced.
- the plurality of recesses are arranged along a radial direction and a circumferential direction of the through hole, A part of the plurality of recesses includes a plurality of first recesses arranged along the radial direction of the through hole, In each of the plurality of land surfaces, the plurality of first recesses are located in a region of 10% or more and 20% or less at a central angle from the boundary of the land surface, Each of the plurality of first recesses has a depth in the range of 0.001 mm to 0.025 mm.
- the first recesses arranged in the radial direction in a predetermined region near the boundary have a depth in the range of 0.001 mm or more and 0.025 mm or less, the first recesses substantially reduce the land surface. A reliable area can be surely reduced.
- the opening area of the first recess gradually increases from the inside toward the outside in the radial direction of the through hole. According to this configuration, by increasing the opening area of the first recess toward the outer side in the radial direction, the ratio at which the circumferential length of the land surface is substantially shortened is made constant regardless of the radial position. Can do.
- the depth of the plurality of recesses changes stepwise along the circumferential direction of the through hole. According to this configuration, the pressure distribution of the lubricating oil in the bearing gap formed by the land surface can be adjusted by changing the depth of the concave portion stepwise.
- the plurality of recesses are arranged in a spiral shape or a herringbone shape. According to this configuration, the lubricating oil can be guided along the circumferential direction of the land surface in the bearing gap formed by the land surface by the plurality of concave portions arranged in a spiral shape or a herringbone shape. The pressure of the lubricating oil in the gap can be increased efficiently.
- One of the first thrust portion and the second thrust portion, on which the plurality of land surfaces are formed extends along the outer peripheral edge of the land surface and the outer peripheral edge of the tapered surface in the circumferential direction of the through hole. Further having an annular surface, The surface roughness of the land surface is larger than the surface roughness of the annular surface.
- the lubricating oil When lubricating oil is supplied onto the tapered surface from the inner side to the outer side in the radial direction of the through hole, the lubricating oil tends to flow toward the outer side in the radial direction even in the bearing gap formed by the land surface. . If the flow direction of the lubricating oil can be made to follow the circumferential direction, the pressure of the lubricating oil can be increased in the bearing gap. In this regard, when the surface roughness of the land surface is made larger than the surface roughness of the annular surface, the annular surface is smooth, so that a relatively thick boundary layer is formed on the annular surface compared to the land surface. .
- a plurality of fine holes are formed in each of the plurality of land surfaces, Each of the plurality of fine holes has a depth of 1/10 to 1/100 of the depth of the at least one recess.
- the surface roughness of the land surface is made to be greater than the surface roughness of the annular surface. Can also be increased.
- the plurality of fine holes in the land surface are formed by pores of a porous material
- the annular surface is formed by a covering material that covers the porous material. According to this configuration, in the region where the annular surface is formed, the surface roughness of the annular surface can be made smaller than that of the land surface by covering the porous material with the covering material.
- a turbocharger includes: Any one of the taper land type thrust bearing devices described above; A centrifugal compressor having an impeller; A turbine having turbine blades, The turbine blade and the impeller are connected via the rotating shaft.
- turbochargers since the tapered land type thrust bearing device has excellent mechanical efficiency, the torque of the turbine rotor blade is transmitted to the impeller with low loss. As a result, turbochargers also have excellent mechanical efficiency.
- the land surface area is small, the land surface area is substantially reduced without changing the contour shape of the land surface, and the taper land type thrust having excellent mechanical efficiency is achieved.
- a bearing device and a turbocharger including the bearing device are provided.
- FIG. 1 is a longitudinal sectional view schematically showing a turbocharger according to some embodiments of the present invention. It is a figure for demonstrating the attachment structure of the thrust bearing with respect to a drive shaft. It is a top view which shows a thrust member roughly.
- FIG. 4 is an enlarged view of a region IV in FIG. 3. It is a perspective view which expands and shows the area
- FIG. 5 is a developed view of a partial cross section taken along line VI-VI in FIG. 4.
- FIG. 5 is a schematic plan view corresponding to FIG. 4 according to some embodiments.
- FIG. 8 is a diagram showing an expanded partial cross-section along line VIII-VIII in FIG. 7.
- FIG. 5 is a schematic plan view corresponding to FIG. 4 according to some embodiments.
- FIG. 10 is a diagram showing a developed partial cross-section along the line XX in FIG. 9.
- FIG. 5 is a schematic plan view corresponding to FIG. 4 according to some embodiments.
- FIG. 12 is a diagram illustrating a partial cross section along line XII-XII in FIG.
- FIG. 5 is a schematic plan view corresponding to FIG. 4 according to some embodiments. It is a figure which shows the partial cross section which follows the XIV-XIV line
- FIG. 5 is a schematic plan view corresponding to FIG. 4 according to some embodiments.
- FIG. 5 is a schematic plan view corresponding to FIG. 4 according to some embodiments.
- FIG. 5 is a schematic plan view corresponding to FIG. 4 according to some embodiments.
- FIG. 5 is a schematic plan view corresponding to FIG. 4 according to some embodiments.
- FIG. 5 is a schematic plan view corresponding to FIG. 4 according to some embodiments.
- FIG. 5 is a schematic plan view corresponding to FIG. 4 according to some embodiments. It is a schematic perspective view for demonstrating the shape of the recessed part which concerns on some embodiment. It is a schematic perspective view for demonstrating the shape of the recessed part which concerns on some embodiment. FIG. 5 is a schematic plan view corresponding to FIG. 4 according to some embodiments.
- FIG. 1 is a longitudinal sectional view schematically showing a turbocharger according to some embodiments of the present invention.
- the turbocharger is applied to an internal combustion engine such as a vehicle or a ship.
- the turbocharger has a turbine 10 and a centrifugal compressor 12.
- the turbine 10 includes a turbine housing 14 and a turbine blade (turbine impeller) 16 rotatably accommodated in the turbine housing 14, and the compressor 12 is rotatably accommodated in the compressor housing 18 and the compressor housing 18.
- Impeller (compressor impeller) 20 Impeller (compressor impeller) 20.
- the turbine housing 14 and the compressor housing 18 are fixed to the bearing housing 22 by a fastening member (not shown), and the turbine rotor blade 16 of the turbine 10 and the impeller 20 of the compressor 12 are driven in a drive shaft (turbine rotor) 24 that extends in the bearing housing 22.
- a drive shaft turbine rotor
- the turbine rotor blade 16 of the turbine 10 is rotated by, for example, exhaust gas discharged from the internal combustion engine, and thereby the impeller 20 of the compressor 12 is rotated via the drive shaft 24.
- the intake air supplied to the internal combustion engine is compressed by the rotation of the impeller 20 of the compressor 12.
- the turbine housing 14 includes a cylindrical portion (shroud portion) 28 that houses the turbine rotor blade 16 and a scroll portion 30 that surrounds a portion of the cylindrical portion 28 on the bearing housing 22 side.
- the scroll portion 30 has an exhaust gas inlet (not shown) and communicates with the cylindrical portion 28 via the throat portion 32.
- the opening of the cylindrical portion 28 on the side opposite to the bearing housing 22 forms an exhaust gas outlet.
- the end wall 34 of the bearing housing 22 is fitted into the opening of the turbine housing 14 on the bearing housing 22 side.
- a cylindrical seal portion 36 is integrally and coaxially provided on the end wall 34, and the seal portion 36 forms a seal hole that penetrates the center of the end wall 34.
- An end of the drive shaft 24 on the turbine blade 16 side is disposed in the seal portion 36, and a seal ring 38 is disposed in a gap between the drive shaft 24 and the seal portion 36.
- An annular back plate 40 is disposed in an annular recess between the end wall 34 and the rear surface of the turbine rotor blade 16.
- the outer peripheral portion of the back plate 40 is sandwiched between the turbine housing 14 and the bearing housing 22, and the inner peripheral edge of the back plate 40 surrounds the seal portion 36.
- a bearing portion 44 is provided integrally with the peripheral wall 42, and a bearing hole is formed in the bearing portion 44.
- two floating bushes 46 are disposed as radial bearings, and the central portion of the drive shaft 24 is disposed in the bearing hole of the bearing portion 44 in a state of passing through the floating bush 46.
- a plate-shaped thrust member 48 orthogonal to the axis 26 is fixed to the end face of the bearing portion 44 on the compressor 12 side, and the drive shaft 24 passes through the through hole of the thrust member 48.
- a thrust collar 50 and a thrust sleeve 52 are fitted to the drive shaft 24, and the thrust member 48, the thrust collar 50, and the thrust sleeve 52 constitute a thrust bearing device.
- the peripheral wall 42 of the bearing housing 22 is provided with an oil supply port 54 and an oil discharge port 56, and the bearing portion 44 and the thrust member 48 are used for supplying lubricating oil to the bearing clearances of the radial bearing and the thrust bearing.
- An oil supply path is formed.
- an oil deflector 58 is installed so as to cover the surface of the thrust member 48 on the compressor 12 side in order to prevent the lubricating oil from scattering in the direction of the compressor 12.
- a lid member 60 having a seal hole in the center is fitted into the opening of the bearing housing 22 on the compressor 12 side, and the lid member 60 is fixed to the bearing housing 22 by a fixing ring 62.
- the thrust sleeve 52 passes through the seal hole of the lid member 60, and a seal ring (not shown) is disposed in the gap between the thrust sleeve 52 and the seal hole.
- cylinder portion 64 that houses the compressor housing 18 and the impeller 20, and a scroll portion 66 that surrounds a portion of the cylinder portion 64 on the bearing housing 22 side.
- the scroll portion 66 has an air supply outlet (not shown) and communicates with the cylindrical portion 64 via the diffuser portion 68.
- the opening of the cylindrical portion 64 opposite to the bearing housing 22 forms an intake inlet.
- FIG. 2 is a view for explaining a structure for attaching a thrust bearing to the drive shaft (rotary shaft) 24.
- the impeller 20 includes a hub 70 and a plurality of wings 72.
- the hub 70 has a rotationally symmetric shape about the axis 26. In the direction along the axis 26, one end side of the hub 70 is located on the intake inlet side, and the other end side of the hub 70 is located on the diffuser portion 68 side.
- the outer peripheral surface 74 of the hub 70 has a trumpet shape that expands toward the other end side, and the hub 70 has a back surface 76 that faces the lid member 60 on the other end side.
- the hub 70 is provided with mounting holes 78 that pass through the hub 70 along the axis 26, and the mounting holes 78 are open at both ends of the hub 70.
- the plurality of blades 72 are integrally attached to the outer peripheral surface 74 of the hub 70, and are arranged at a predetermined interval in the circumferential direction of the hub 70.
- the plurality of blades 72 include a full blade 72a and a splitter blade 72b that is shorter than the full blade 72a in the direction along the axis 26, and the full blade 72a and the splitter blade 72b alternate in the circumferential direction. Placed in.
- the drive shaft 24 has a shaft portion 80, a large diameter portion 82, and an intermediate portion 84 that are integrally formed with each other.
- the shaft portion 80 extends inside the mounting hole 78 of the impeller 20, and the large diameter portion 82 is separated from the impeller 20.
- the intermediate portion 84 is located between the shaft portion 80 and the large diameter portion 82.
- the intermediate portion 84 has a smaller diameter than the large diameter portion 82, and a stepped portion 86 is formed at the boundary between the intermediate portion 84 and the large diameter portion 82.
- a female screw is formed on the tip side of the shaft portion 80 located on one end side of the impeller 20, and a nut as a fastening member 88 is screwed to the female screw.
- the fastening member 88 abuts on one end side of the impeller 20 and applies an axial force toward the stepped portion 86 in a direction along the axis 26 to the impeller 20.
- At least one flange 90 is fitted to the intermediate portion 84 of the drive shaft 24.
- the thrust collar 50 and the thrust sleeve 52 fitted in series with the intermediate portion 84 each have a flange 90 (90a, 90b).
- the thrust collar 50 and the thrust sleeve 52 each have a sleeve portion 92 (92a, 92b) formed integrally with the flange portion 90 (90a, 90b), and the sleeve portion 92 (92a, 92b) is an intermediate portion 84. Is fitted.
- the sleeve portion 92a is positioned between the flange portion 90a and the flange portion 90b, and the sleeve portion 92b is disposed between the flange portion 90b and the impeller 20.
- the thrust collar 50 and the thrust sleeve 52 are sandwiched between the back surface 76 of the impeller 20 and the stepped portion 86 by the axial force of the fastening member 88 and are configured to rotate together with the drive shaft 24.
- the through hole 94 of the thrust member 48 is penetrated by the intermediate portion 84, and a sleeve portion 92 a is disposed between the inner peripheral surface of the through hole 94 and the outer peripheral surface of the intermediate portion 84.
- the thrust member 48 has a thrust portion 96 that is in sliding contact with the flange portions 90 a and 90 b in the direction along the axis 26 around the through hole 94.
- the thrust member 48 has thrust portions 96 (96a, 96b) on both sides in the direction along the axis 26.
- the thrust member 48 is provided with an oil supply hole 98 that forms an oil supply passage, and an outlet of the oil supply hole 98 is open to the inner peripheral surface of the through hole 94.
- the lubricating oil that has flowed out from the outlet of the oil supply hole 98 passes through the gap between the outer peripheral surface of the sleeve portion 92a and the inner peripheral surface of the through hole 94, and between the thrust portion 96 (96a, 96b) and the flange portion 90 (90a, 90b). It is comprised so that it may be supplied to.
- FIG. 3 is a plan view schematically showing the thrust member 48.
- FIG. 4 is an enlarged view of a region IV in FIG.
- FIG. 5 is an enlarged perspective view showing a region IV in FIG.
- FIG. 6 is a developed view of a partial cross section taken along line VI-VI in FIG.
- the thrust portion 96 of the thrust member 48 has a plurality of land surfaces 100 and a plurality of tapered surfaces 102 that are alternately arranged in the circumferential direction of the through hole 94.
- the plurality of land surfaces 100 are parallel to the axis of the drive shaft (rotating shaft) 24, that is, parallel to the surface orthogonal to the axis 26, and are provided at intervals in the circumferential direction of the through hole 94.
- Each land surface 100 has boundaries 104 and 106 on both sides in the circumferential direction, and the boundaries 104 and 106 extend along the radial direction of the through hole 94.
- the contour shape of each land surface 100 has a sector shape, and each land surface 100 is arranged flush with a surface orthogonal to the axis 26.
- the plurality of tapered surfaces 102 are respectively provided between the plurality of land surfaces 100 in the circumferential direction of the through hole 94.
- Each tapered surface 102 is connected to the boundary 106 of the land surface 100 on one side in the circumferential direction of the through hole 94 via a step 108, and the boundary of the land surface 100 on the other side in the circumferential direction of the through hole 94.
- 104 is continuously connected. Therefore, one boundary 110 of the tapered surface 102 is separated from the land surface 100 in the axial direction of the through hole 94.
- Each tapered surface 102 extends spirally around the axis 26 and is inclined at an inclination angle ⁇ t with respect to a plane orthogonal to the axis 26.
- the boundary 104 is located upstream of the boundary 106 in the rotation direction R of the flange 90 facing the thrust part 96.
- the flange portion 90 includes a thrust portion 112 that is in sliding contact with the plurality of land surfaces 100 via lubricating oil, and the thrust portion 112 is formed by an annular flat surface that faces the plurality of land surfaces 100 and the plurality of tapered surfaces 102. Has been.
- the flat surface of the thrust portion 112 is parallel to a surface orthogonal to the axis 26, and a tapered wedge-shaped space that gradually narrows along the rotation direction R between the flat surface of the thrust portion 112 and the tapered surface 102.
- a bearing gap G is formed between the flat surface of the thrust portion 112 and the land surface 100 parallel to each other and the wedge-shaped space.
- the diameter of the outer peripheral edge of the flat surface forming the thrust portion 112 of the flange 90 is substantially equal to the diameter D of the outer peripheral edge of the land surface 100.
- Each of the plurality of land surfaces 100 is provided with at least one recess 114.
- the thrust portion 96 of the thrust member 48 is in sliding contact with the thrust portion 96 via the lubricating oil in the region where the recess 114 is formed.
- the bearing gap G between the thrust portions 112 of the flange portion 90 is enlarged, and the area or circumferential length of the land surface 100 can be substantially reduced.
- the substantial area or circumferential length of the land surface 100 being reduced, the mechanical loss of the thrust bearing device is reduced, and the mechanical efficiency is improved.
- the recess 114 is easier than changing the contour shape of the land surface 100 to reduce the area. For this reason, according to this configuration, even if the land surface 100 is small, the substantial area of the land surface 100 can be reduced with high accuracy.
- the method for forming the recess 114 is not particularly limited.
- the recess 114 can be formed by pressing a mold having a protrusion against the land surface 100 or irradiating the land surface 100 with a laser.
- turbochargers since the thrust bearing device has excellent mechanical efficiency, the torque of the turbine rotor blade 16 is transmitted to the impeller 20 with low loss. As a result, turbochargers also have excellent mechanical efficiency.
- the plurality of land surfaces 100 are composed of three or more land surfaces 100, the diameter D of the outer periphery of the land surface 100 is 15 mm or less, and the inclination angle ⁇ t of the taper surface 102 is 1e ⁇ 5 ° or more. Even if the angle is 0 ° or less, the substantial area of the land surface 100 can be easily reduced without changing the contour shape of the land surface 100 by forming at least one recess 114.
- At least one recess 114 comprises a plurality of recesses 114. According to this configuration, since the substantial area of the land surface 100 is reduced by the plurality of recesses 114, the effective area of the land surface 100 can be reduced with high accuracy by adjusting the number of the recesses 114. can do.
- the plurality of recesses 114 includes a plurality of first recesses 114 a arranged along the radial direction of the through-hole 94, and the plurality of first recesses 114 a is formed on each of the plurality of land surfaces 100.
- the center angle from the boundary 104 of the land surface 100 is 10% or more and 20% or less. That is, the central angle ⁇ c of the region where the first recess 114 a is formed is in the range of 10% to 20% of the central angle ⁇ a of the land surface 100.
- each of the some 1st recessed part 114a has the depth dc of the range of 0.001 mm or more and 0.025 mm or less.
- the first recesses 114a arranged in the radial direction in a predetermined region near the boundary 104 have a depth dc in the range of 0.001 mm or more and 0.025 mm or less.
- the substantial area of the surface 100 can be reliably reduced. Specifically, the area can be substantially reduced on the upstream side of the land surface 100 in the rotation direction R by the first recess 114a.
- FIG. 7 is a schematic plan view corresponding to FIG. 4 according to some embodiments.
- FIG. 8 is a developed view of a partial cross section along the line VIII-VIII in FIG.
- the plurality of first recesses 114 b arranged along the radial direction of the through hole 94 has a central angle of 10% from the boundary 106 of the land surface 100. It is located in the region of 20% or less. That is, the central angle ⁇ c of the region where the first recess 114 a is formed is in the range of 10% to 20% of the central angle ⁇ a of the land surface 100.
- each of the some 1st recessed part 114b has the depth dc of the range of 0.001 mm or more and 0.025 mm or less.
- the first recesses 114b arranged in the radial direction in a predetermined region near the boundary 106 have a depth dc in the range of 0.001 mm or more and 0.025 mm or less.
- the substantial area of the surface 100 can be reliably reduced. Specifically, the area can be substantially reduced on the downstream side of the land surface 100 in the rotation direction R by the first recess 114b.
- FIG. 9 and 11 are schematic plan views respectively corresponding to FIG. 4 according to some embodiments.
- 10 and FIG. 12 are developed views showing partial cross sections along line XX in FIG. 9 and line XII-XII in FIG. 11, respectively.
- the plurality of recesses 114 are arranged along the radial direction and the circumferential direction of the through-hole 94.
- a part of the plurality of recesses 114 includes a plurality of first recesses 114 a and 114 b arranged along the radial direction of the through-hole 94, and the plurality of first recesses 114 a and 114 b are provided on each of the plurality of land surfaces 100. Is located in the region of 10% or more and 20% or less at the central angle from the boundaries 104, 106 of the land surface 100.
- each of several 1st recessed part 114a, 114b has the depth dc of the range of 0.001 mm or more and 0.025 mm or less.
- the first recesses 114a and 114b arranged in the radial direction in a predetermined region near the boundaries 104 and 106 have a depth dc in the range of 0.001 mm or more and 0.025 mm or less.
- the substantial area of the land surface 100 can be reliably reduced by the recesses 114a and 114b.
- the depth of the plurality of recesses 114 changes stepwise along the circumferential direction of the through hole 94.
- the pressure distribution of the lubricating oil in the bearing gap G formed by the land surface 100 can be adjusted by changing the depth of the recess 114 stepwise. 9 and 10, the depth of the concave portion 114 becomes shallower as it goes downstream in the rotational direction R. On the contrary, in FIGS. The depth of the concave portion 114 becomes deeper as it advances.
- FIG. 13 is a schematic plan view corresponding to FIG. 4 according to some embodiments.
- FIG. 14 is a view showing a partial cross section taken along line XIV-XIV in FIG.
- the thrust portion 96 extends along the outer peripheral edge of the land surface 100 and the outer peripheral edge of the tapered surface 102 in the circumferential direction of the through hole 94.
- An annular surface 116 is further included.
- the annular surface 116 is formed by a flat surface that is flush with the plurality of land surfaces 100, and the surface roughness of the land surface 100 is larger than the surface roughness of the annular surface 116.
- the lubricating oil When lubricating oil is supplied onto the tapered surface 102 from the inner side toward the outer side in the radial direction of the through hole 94, the lubricating oil is also radially outward in the bearing gap G formed by the land surface 100 by centrifugal force. Try to spill toward. If the flow direction of the lubricating oil can be made to follow the circumferential direction, the pressure of the lubricating oil can be increased in the bearing gap G. In this regard, when the surface roughness of the land surface 100 is made larger than the surface roughness of the annular surface 116, the annular surface 116 is smooth, and therefore a relatively thick boundary on the annular surface 116 compared to the land surface 100. A layer is formed.
- a plurality of micro holes 118 are formed in each of the plurality of land surfaces 100, and the plurality of micro holes 118 are formed at the depth of at least one recess 114 or the first recesses 114 a and 114 b. It has a depth of 1/10 to 1/100 of the depth dc. According to this configuration, a plurality of micro holes 118 having a depth of 1/10 to 1/100 of the depth of the recess 114 or the depth dc of the first recesses 114a and 114b are provided separately from the recess 114.
- the surface roughness of the land surface 100 can be made larger than the surface roughness of the annular surface 116.
- FIG. 15 is a schematic plan view corresponding to FIG. 4 according to some embodiments.
- the plurality of micro holes 118 in the land surface 100 are formed by the pores of the porous material, and the annular surface 116 is formed by the covering material 116a covering the porous material as shown in FIG. Has been.
- the porous material is made of, for example, a sintered material, and the covering material 116a is made of, for example, resin. According to this configuration, the surface roughness of the annular surface 116 can be made smaller than that of the land surface 100 by covering the porous material with the covering material 116 a in the region where the annular surface 116 is formed.
- FIG. 16 is a schematic plan view corresponding to FIG. 4 according to some embodiments.
- the plurality of recesses 114 are arranged along the circumferential direction and the radial direction of the through hole 94.
- each depth of the plurality of recesses 114 is in the range of 0.001 mm to 0.025 mm, and the total opening area of the plurality of recesses 114 is 10% to 50% of the area of each land surface 100. Is in range.
- the recesses 114 are arranged in a zigzag or zigzag shape in the circumferential direction, but may be arranged in a row in the circumferential direction.
- FIG. 17 is a schematic plan view corresponding to FIG. 4 according to some embodiments.
- the plurality of recesses 114 are arranged in a spiral.
- the plurality of recesses 114 are arranged so as to form a plurality of rows each extending so as to gradually deviate from the radial direction as approaching the radially outer side.
- Each row is arranged so as to approach the upstream in the rotation direction R as it approaches the radially outer side.
- each depth of the plurality of recesses 114 is in the range of 0.001 mm to 0.025 mm
- the total opening area of the plurality of recesses 114 is 10% to 50% of the area of each land surface 100. Is in range.
- the lubricating oil can be guided along the circumferential direction of the land surface 100 in the bearing gap G formed by the land surface 100 by the plurality of concave portions 114 arranged in a spiral shape.
- the pressure of the lubricating oil in the gap G can be increased efficiently.
- the plurality of recesses 114 are arranged in a herringbone or V-shape.
- each depth of the plurality of recesses 114 is in the range of 0.001 mm to 0.025 mm, and the total opening area of the plurality of recesses 114 is 10% to 50% of the area of each land surface 100. Is in range.
- the lubricating oil is landed in the bearing gap G formed by the land surface 100 by the plurality of concave portions 114 arranged in a herringbone shape or in a V shape opened upstream in the rotation direction R.
- the guide can be guided along the circumferential direction of the surface 100, and the pressure of the lubricating oil in the bearing gap G can be increased efficiently.
- the recess 114 has a hemispherical shape with a circular opening.
- the shape of the recess 114 is a rectangular parallelepiped shape having a rectangular opening or a square frustum shape.
- the shape of the concave portion 114 is not limited to these, and the concave portion 114 may have a circular truncated cone shape, and the concave portion 114 may have an elliptical shape or an elliptical shape. 114 may be groove-shaped.
- FIG. 21 is a schematic plan view corresponding to FIG. 4 according to some embodiments.
- the opening areas of the plurality of first recesses 114 a are formed so as to increase stepwise from the radially inner side to the outer side of the through hole 94.
- the first recess 114b of FIG. 7 is also formed so as to increase stepwise from the radially inner side to the outer side of the through hole 94.
- the present invention is not limited to the above-described embodiments, and includes forms obtained by changing the above-described embodiments and combinations of these forms as appropriate.
- the annular surface is similar to some embodiments shown in FIGS. 116 may be provided.
- the thrust collar 50 and the thrust sleeve 52 in which the sleeve portion 92 (92a, 92b) and the flange portion 90 (90a, 90b) are integrated are used, but the sleeve portion 92 and the flange portion 90 are used. May be separate. It is only necessary that the flange portion 90 is fitted to the drive shaft 24 and the flange portion 90 is configured to be rotatable together with the drive shaft 24.
- the thrust member 48 is sandwiched between the two flange portions 90 (90a, 90b), and the thrust portions 96 are formed on both sides of the thrust member 48.
- the thrust portion is formed only on one side. 96 may be provided, and one collar portion 90 may be disposed opposite to the thrust portion 96.
- the thrust portion (second thrust portion) 96 of the fixed thrust member 48 is provided with the land surface 100, the tapered surface 102, and the concave portion 114, and the thrust portion (first portion) of the movable collar 90 is provided.
- (1 thrust portion) 112 is provided with an annular flat surface, but conversely, an annular flat surface is provided on the thrust portion 96 of the fixed thrust member 48 and the thrust portion 112 of the movable collar 90 is provided.
- the land surface 100, the tapered surface 102, and the recess 114 may be provided on the surface.
- the shaft portion 80, the large diameter portion 82, and the intermediate portion 84 are integrally formed.
- the shaft portion 80 and the intermediate portion 84 are stud bolts that are separate from the large diameter portion 82. Etc. may be formed.
- the step portion 86 may be formed by a retaining ring or the like fitted to the intermediate portion 84.
- the centrifugal compressor may be a variable displacement type.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Combustion & Propulsion (AREA)
- Metallurgy (AREA)
- Supercharger (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
Description
例えば特許文献1に記載されたスラスト軸受は、テーパランド型スラスト軸受であり、ロータ軸に嵌合されるスラストカラーと、ロータ軸によって貫通されてスラストカラーと対向配置されるスラスト部材とを有している。スラスト部材には、スラストカラーと対向する環状の領域に、複数のテーパ面と複数のランド面が周方向に交互に設けられている。
回転軸と、
前記回転軸に嵌合された、第1スラスト部を有する鍔部と、
前記回転軸によって貫通される貫通孔、及び、該貫通孔の周囲に設けられて前記鍔部の第1スラスト部と対向する第2スラスト部を有するスラスト部材とを備え、
前記第1スラスト部及び前記第2スラスト部のうち一方は、
前記回転軸の軸線に直交する面にそれぞれ平行であって、前記貫通孔の周方向に間隔を存して設けられた複数のランド面と、
前記複数のランド面間にそれぞれ設けられ、前記貫通孔の周方向にて一方の側のランド面の境界には段差を介して連なり、前記貫通孔の周方向にて他方の側のランド面の境界には連続的に連なるテーパ面と、
前記複数のランド面の各々に設けられた少なくとも1つの凹部とを有する。
一方、凹部を形成することは、ランド面の輪郭形状を変更して面積を縮小するよりも容易である。このため、この構成によれば、ランド面が小さくても、ランド面の実質的な面積を高精度にて縮小することができる。
前記複数のランド面は、3つ以上のランド面からなり、
前記複数のランド面の外周の直径は15mm以下であり、
前記テーパ面の傾斜角度は1e-5°以上1.0°以下の範囲に入っている。
この構成では、複数のランド面が3つ以上のランド面からなり、ランド面の外周の直径が15mm以下であって、テーパ面の傾斜角度が1e-5°以上1.0°以下であっても、少なくとも1つの凹部を形成することによって、ランド面の輪郭形状を変更することなく、ランド面の実質的な面積を容易に縮小することができる。
この構成によれば、複数の凹部によってランド面の実質的な面積を縮小しているので、凹部の数を調整することによって、ランド面の実質的な面積を高精度にて縮小することができる。
前記複数の凹部は、前記貫通孔の径方向に沿って配列された複数の第1凹部からなり、
前記複数のランド面の各々において、前記複数の第1凹部は、前記ランド面の境界から中心角にて10%以上20%以下の領域内に位置しており、
前記複数の第1凹部の各々は、0.001mm以上0.025mm以下の範囲の深さを有する。
この構成によれば、境界近傍の所定の領域内において径方向に配列された第1凹部が
0.001mm以上0.025mm以下の範囲の深さを有するので、第1凹部によってランド面の実質的な面積を確実に縮小することができる。
前記複数の凹部は、前記貫通孔の径方向及び周方向に沿って配列され、
前記複数の凹部のうち一部は、前記貫通孔の径方向に沿って配列された複数の第1凹部からなり、
前記複数のランド面の各々において、前記複数の第1凹部は、前記ランド面の境界から中心角にて10%以上20%以下の領域内に位置しており、
前記複数の第1凹部の各々は、0.001mm以上0.025mm以下の範囲の深さを有する。
この構成によれば、境界近傍の所定の領域内において径方向に配列された第1凹部が0.001mm以上0.025mm以下の範囲の深さを有するので、第1凹部によってランド面の実質的な面積を確実に縮小することができる。
この構成によれば、径方向外側ほど第1凹部の開口面積が大きくなることで、ランド面の周方向長さが実質的に短縮される比率を、径方向位置によらずに一定にすることができる。
この構成によれば、凹部の深さが段階的に変化することで、ランド面によって形成される軸受隙間における潤滑油の圧力の分布を調整することができる。
この構成によれば、スパイラル状又はヘリングボーン状に配列された複数の凹部によって、ランド面によって形成される軸受隙間において、潤滑油をランド面の周方向に沿うように案内することができ、軸受隙間での潤滑油の圧力を効率的に高くすることができる。
前記第1スラスト部及び前記第2スラスト部のうち前記複数のランド面が形成された一方は、前記貫通孔の周方向にて前記ランド面の外周縁及び前記テーパ面の外周縁に沿って延在する環状面を更に有し、
前記ランド面の表面粗さは、前記環状面の表面粗さよりも大である。
この点、ランド面の表面粗さを環状面の表面粗さよりも大にした場合、環状面が滑らかであるため、ランド面上に比べ、環状面上に相対的に厚い境界層が形成される。このため、軸受隙間から径方向外側に向かって流出するとき、潤滑油の速さは、ランド面の外周縁を超えると遅くなり、これに対応して潤滑油の圧力が上昇する。この圧力差が障壁となることで、潤滑油が軸受隙間から径方向外側に向かって流出するのが抑制され、潤滑油を周方向に沿って流すことができる。
前記複数のランド面の各々には複数の微細穴が形成され、
前記複数の微細穴の各々は、前記少なくとも1つの凹部の深さの1/10~1/100の深さを有する。
前記環状面は、前記多孔質材を覆う被覆材によって形成されている。
この構成によれば、環状面を形成する領域において、多孔質材を被覆材で覆うことで、ランド面よりも環状面の表面粗さを容易に小さくすることができる。
上記した何れか1つのテーパランド型スラスト軸受装置と,
インペラを有する遠心式コンプレッサと、
タービン動翼を有するタービンとを備え、
前記回転軸を介して前記タービン翼と前記インペラが連結されている。
ターボチャージャは、タービン10と、遠心式のコンプレッサ12とを有する。タービン10は、タービンハウジング14と、タービンハウジング14内に回転可能に収容されたタービン動翼(タービンインペラ)16とを有し、コンプレッサ12は、コンプレッサハウジング18と、コンプレッサハウジング18に回転可能に収容されたインペラ(コンプレッサインペラ)20とを有する。
インペラ20は、ハブ70と、複数の翼72とからなる。ハブ70は、軸線26の回りに回転対称な形状を有する。軸線26に沿う方向にて、ハブ70の一端側は吸気の入口側に位置し、ハブ70の他端側はディフューザ部68側に位置している。ハブ70の外周面74は他端側に向かって拡大するラッパ形状を有し、ハブ70は他端側に蓋部材60と対向する背面76を有する。
また、スラストカラー50及びスラストスリーブ52は、鍔部90(90a,90b)と一体に形成されたスリーブ部92(92a,92b)をそれぞれ有し、スリーブ部92(92a,92b)は中間部84に嵌合されている。スリーブ部92aは、鍔部90aと鍔部90bの間に位置し、スリーブ部92bは、鍔部90bとインペラ20の間に配置されている。
スラストカラー50及びスラストスリーブ52は、インペラ20の背面76と段差部86との間にて締結部材88の軸力をもって挟まれており、駆動軸24とともに回転するように構成されている。
図3~図6に示したように、スラスト部材48のスラスト部96は、貫通孔94の周方向に交互に配置された複数のランド面100と複数のテーパ面102とを有する。
なお、鍔部90のスラスト部112を形成する平坦面の外周縁の直径は、ランド面100の外周縁の直径Dに略等しい。
この構成によれば、ランド面100に少なくとも1つの凹部114を設けることで、凹部114が形成された領域において、スラスト部材48のスラスト部96と、該スラスト部96と潤滑油を介して摺接する鍔部90のスラスト部112の間の軸受隙間Gが拡大され、ランド面100の面積又は周方向長さを実質的に縮小することができる。そして、ランド面100の実質的な面積又は周方向長さが縮小される結果、スラスト軸受装置の機械損失が低減され、機械効率が向上する。
なお、凹部114の形成方法は特に限定されることはなく、例えば、突起を有する型をランド面100に押し付けたり、ランド面100にレーザを照射することによって凹部114を形成することができる。
この構成では、複数のランド面100が3つ以上のランド面100からなり、ランド面100の外周の直径Dが15mm以下であって、テーパ面102の傾斜角度θtが1e-5°以上1.0°以下であっても、少なくとも1つの凹部114を形成することによって、ランド面100の輪郭形状を変更することなく、ランド面100の実質的な面積を容易に縮小することができる。
この構成によれば、複数の凹部114によってランド面100の実質的な面積を縮小しているので、凹部114の数を調整することによって、ランド面100の実質的な面積を高精度にて縮小することができる。
この構成によれば、境界104近傍の所定の領域内において径方向に配列された第1凹部114aが0.001mm以上0.025mm以下の範囲の深さdcを有するので、第1凹部114aによってランド面100の実質的な面積を確実に縮小することができる。具体的には、第1凹部114aによって、回転方向Rにてランド面100の上流側にて実質的に面積を縮小することができる。
図7及び図8に示すように、幾つかの実施形態では、貫通孔94の径方向に沿って配列された複数の第1凹部114bは、ランド面100の境界106から中心角にて10%以上20%以下の領域内に位置している。すなわち、第1凹部114aが形成されている領域の中心角θcは、ランド面100の中心角θaの10%以上20%以下の範囲内にある。そして、複数の第1凹部114bの各々は、0.001mm以上0.025mm以下の範囲の深さdcを有する。
この構成によれば、凹部114の深さが段階的に変化することで、ランド面100によって形成される軸受隙間Gにおける潤滑油の圧力の分布を調整することができる。なお、図9及び図10では、回転方向Rにて下流に進むほど、凹部114の深さが浅くなっており、これとは逆に、図11及び図12では、回転方向Rにて下流に進むほど、凹部114の深さが深くなっている。
図13及び図14に示したように、幾つかの実施形態では、スラスト部96は、貫通孔94の周方向にてランド面100の外周縁及びテーパ面102の外周縁に沿って延在する環状面116を更に有する。環状面116は、複数のランド面100と面一な平坦面によって形成され、ランド面100の表面粗さは、環状面116の表面粗さよりも大である。
この点、ランド面100の表面粗さを環状面116の表面粗さよりも大にした場合、環状面116が滑らかであるため、ランド面100上に比べ、環状面116上に相対的に厚い境界層が形成される。このため、軸受隙間Gから径方向外側に向かって流出するとき、潤滑油の径方向速さur1は、ランド面100の外周縁を超えると径方向速さur2まで遅くなり、これに対応して潤滑油の圧力が上昇する。この圧力差が障壁となることで、潤滑油が軸受隙間Gから径方向外側に向かって流出するのが抑制され、潤滑油を周方向に沿って流すことができる。
この構成によれば、凹部114とは別に、凹部114の深さ、又は、第1凹部114a,114bの深さdcの1/10~1/100の深さを有する複数の微細穴118を設けることで、ランド面100の表面粗さを環状面116の表面粗さよりも大きくすることができる。
幾つかの実施形態では、ランド面100の複数の微細穴118は、多孔質材の細孔によって形成され、環状面116は、図15に示したように多孔質材を覆う被覆材116aによって形成されている。多孔質材は例えば焼結材からなり、被覆材116aは例えば樹脂からなる。
この構成によれば、環状面116を形成する領域において、多孔質材を被覆材116aで覆うことで、ランド面100よりも環状面116の表面粗さを小さくすることができる。
図16に示したように、幾つかの実施形態では、複数の凹部114は、貫通孔94の周方向及び半径方向に沿って配列されている。例えば、複数の凹部114の各深さは0.001mm以上0.025mm以下の範囲に入っており、複数の凹部114の総開口面積は、各ランド面100の面積の10%以上50%以下の範囲に入っている。
この構成によれば、複数の凹部114を形成することで、複数の凹部114を含めた平均的な軸受隙間Gを拡大し、機械損失を低減することができる。なお、図16では、凹部114は周方向に千鳥状又はジグザグ状に配列されているが、周方向に一列に配列されていてもよい。
図17に示したように、幾つかの実施形態では、複数の凹部114は、スパイラル状に配列されている。具体的には、複数の凹部114は、径方向外側に近づくほど径方向から徐々に逸れるようにそれぞれ延びる複数の列をなすように配列されている。各列は、径方向外側に近づくほど、回転方向Rにて上流に近づくように配列されている。例えば、複数の凹部114の各深さは0.001mm以上0.025mm以下の範囲に入っており、複数の凹部114の総開口面積は、各ランド面100の面積の10%以上50%以下の範囲に入っている。
この構成によれば、スパイラル状に配列された複数の凹部114によって、ランド面100によって形成される軸受隙間Gにおいて、潤滑油をランド面100の周方向に沿うように案内することができ、軸受隙間Gでの潤滑油の圧力を効率的に高くすることができる。
図18に示したように、幾つかの実施形態では、複数の凹部114は、へリングボーン状又はV字状に配列されている。例えば、複数の凹部114の各深さは0.001mm以上0.025mm以下の範囲に入っており、複数の凹部114の総開口面積は、各ランド面100の面積の10%以上50%以下の範囲に入っている。
この構成によれば、ヘリングボーン状又は回転方向Rにて上流に向かって開いたV字状に配列された複数の凹部114によって、ランド面100によって形成される軸受隙間Gにおいて、潤滑油をランド面100の周方向に沿うように案内することができ、軸受隙間Gでの潤滑油の圧力を効率的に高くすることができる。
図19では、凹部114の形状は、開口が円形の半球形状である。図20では凹部114の形状は、開口が矩形状の直方体形状若しくは四角錘台形状である。凹部114の形状はこれらに限定されることはなく、凹部114は、開口が円形の円錐台形状であってもよく、凹部114の開口形状は長円形状や楕円形状であってもよく、凹部114は溝状であってもよい。
図21に示したように、幾つかの実施形態では、複数の第1凹部114aの開口面積は、貫通孔94の径方向内側から外側に向かって段階的に大きくなるように形成されている。
この構成によれば、径方向外側ほど第1凹部114aの開口面積が大きくなることで、ランド面100の周方向長さが実質的に短縮される比率を、径方向位置によらずに一定にすることができる。
幾つかの実施形態では、図7の第1凹部114bについても、貫通孔94の径方向内側から外側に向かって段階的に大きくなるように形成される。
例えば、図7、図9、図11、図16~図18及び図21に示された幾つかの実施形態においても、図13~図15に示した幾つかの実施形態のように、環状面116をもうけてもよい。
上述した幾つかの実施形態では、スリーブ部92(92a,92b)と鍔部90(90a,90b)が一体のスラストカラー50及びスラストスリーブ52が用いられていたが、スリーブ部92と鍔部90は別体であってもよい。駆動軸24に鍔部90が嵌合され、鍔部90が駆動軸24とともに回転可能に構成されていればよい。
上述した幾つかの実施形態では、固定されたスラスト部材48のスラスト部(第2スラスト部)96にランド面100、テーパ面102及び凹部114が設けられ、可動の鍔部90のスラスト部(第1スラスト部)112に環状の平坦面が設けられていたが、これとは逆に、固定されたスラスト部材48のスラスト部96に環状の平坦面を設け、可動の鍔部90のスラスト部112にランド面100、テーパ面102及び凹部114を設けてもよい。
更に、遠心式コンプレッサは可変容量タイプであってもよい。
12 コンプレッサ
14 タービンハウジング
16 タービン動翼
18 コンプレッサハウジング
20 インペラ
22 軸受ハウジング
24 駆動軸(回転軸)
26 軸線
28 筒部
30 スクロール部
32 スロート部
34 端壁
36 シール部
38 シールリング
40 バックプレート
42 周壁
44 軸受部
46 浮動ブッシュ
48 スラスト部材
50 スラストカラー
52 スラストスリーブ
54 給油ポート
56 排油ポート
58 オイルデフレクタ
60 蓋部材
62 固定リング
64 筒部
66 スクロール部
68 ディフューザ部
70 ハブ
72 翼
72a フルブレード
72b スプリッタブレード
74 外周面
76 背面
78 取付孔
80 軸部
82 大径部
84 中間部
86 段差部
88 締結部材
90(90a,90b) 鍔部
92(92a,92b) スリーブ部
94 貫通孔
96(96a,96b) スラスト部(第2スラスト部)
98 給油孔
100 ランド面
102 テーパ面
104 境界
106 境界
108 段差
110 境界
112 スラスト部(第1スラスト部)
114 凹部
114a 第1凹部
116 環状面
116a 樹脂材
118 微細穴
Claims (12)
- 回転軸と、
前記回転軸に嵌合された、第1スラスト部を有する鍔部と、
前記回転軸によって貫通される貫通孔、及び、該貫通孔の周囲に設けられて前記鍔部の第1スラスト部と対向する第2スラスト部を有するスラスト部材とを備え、
前記第1スラスト部及び前記第2スラスト部のうち一方は、
前記回転軸の軸線に直交する面にそれぞれ平行であって、前記貫通孔の周方向に間隔を存して設けられた複数のランド面と、
前記複数のランド面間にそれぞれ設けられ、前記貫通孔の周方向にて一方の側のランド面の境界には段差を介して連なり、前記貫通孔の周方向にて他方の側のランド面の境界には連続的に連なるテーパ面と、
前記複数のランド面の各々に設けられた少なくとも1つの凹部とを有する
ことを特徴とするテーパランド型スラスト軸受装置。 - 前記複数のランド面は、3つ以上のランド面からなり、
前記複数のランド面の外周の直径は15mm以下であり、
前記テーパ面の傾斜角度は1e-5°以上1.0°以下の範囲に入っている
ことを特徴とする請求項1に記載のテーパランド型スラスト軸受装置。 - 前記少なくとも1つの凹部は複数の凹部からなる
ことを特徴とする請求項1又は2の何れか一項に記載のテーパランド型スラスト軸受装置。 - 前記複数の凹部は、前記貫通孔の径方向に沿って配列された複数の第1凹部からなり、
前記複数のランド面の各々において、前記複数の第1凹部は、前記ランド面の境界から中心角にて10%以上20%以下の領域内に位置しており、
前記複数の第1凹部の各々は、0.001mm以上0.025mm以下の範囲の深さを有する
ことを特徴とする請求項3に記載のテーパランド型スラスト軸受装置。 - 前記複数の凹部は、前記貫通孔の径方向及び周方向に沿って配列され、
前記複数の凹部のうち一部は、前記貫通孔の径方向に沿って配列された複数の第1凹部からなり、
前記複数のランド面の各々において、前記複数の第1凹部は、前記ランド面の境界から中心角にて10%以上20%以下の領域内に位置しており、
前記複数の第1凹部の各々は、0.001mm以上0.025mm以下の範囲の深さを有する
ことを特徴とする請求項3に記載のテーパランド型スラスト軸受装置。 - 前記第1凹部の開口面積は、前記貫通孔の径方向にて内側から外側に向かって段階的に大きくなっている
ことを特徴とする請求項4又は5に記載のテーパランド型スラスト軸受装置。 - 前記複数の凹部の深さは、前記貫通孔の周方向に沿って段階的に変化している
ことを特徴とする請求項5に記載のテーパランド型スラスト軸受装置。 - 前記複数の凹部は、スパイラル状又はヘリングボーン状に配列されている
ことを特徴とする請求項3に記載のテーパランド型スラスト軸受装置。 - 前記第1スラスト部及び前記第2スラスト部のうち一方は、前記貫通孔の周方向にて前記ランド面の外周縁及び前記テーパ面の外周縁に沿って延在する環状面を更に有し、
前記ランド面の表面粗さは、前記環状面の表面粗さよりも大である
ことを特徴とする請求項1乃至8の何れか一項に記載のテーパランド型スラスト軸受装置。 - 前記複数のランド面の各々には複数の微細穴が形成され、
前記複数の微細穴の各々は、前記少なくとも1つの凹部の深さの1/10~1/100の深さを有する
ことを特徴とする請求項9に記載のテーパランド型スラスト軸受装置。 - 前記ランド面の複数の微細穴は、多孔質材の細孔によって形成され、
前記環状面は、前記多孔質材を覆う被覆材によって形成されている
ことを特徴とする請求項9又は10に記載のテーパランド型スラスト軸受装置。 - 請求項1乃至11の何れか一項に記載のテーパランド型スラスト軸受装置と、
インペラを有する遠心式コンプレッサと、
タービン動翼を有するタービンとを備え、
前記回転軸を介して前記タービン動翼と前記インペラが連結されている
ことを特徴とするターボチャージャ。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016504922A JP6250786B2 (ja) | 2014-02-27 | 2014-02-27 | テーパランド型スラスト軸受装置、及び、該軸受装置を備えるターボチャージャ |
CN201480074123.8A CN105934593B (zh) | 2014-02-27 | 2014-02-27 | 斜面式推力轴承装置和具备该轴承装置的涡轮增压器 |
US15/113,894 US10072707B2 (en) | 2014-02-27 | 2014-02-27 | Tapered land thrust bearing device and turbocharger provided with the bearing device |
EP14884172.9A EP3112706B1 (en) | 2014-02-27 | 2014-02-27 | Tapered land thrust bearing device and turbocharger provided with said bearing device |
PCT/JP2014/054798 WO2015128977A1 (ja) | 2014-02-27 | 2014-02-27 | テーパランド型スラスト軸受装置、及び、該軸受装置を備えるターボチャージャ |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2014/054798 WO2015128977A1 (ja) | 2014-02-27 | 2014-02-27 | テーパランド型スラスト軸受装置、及び、該軸受装置を備えるターボチャージャ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015128977A1 true WO2015128977A1 (ja) | 2015-09-03 |
Family
ID=54008346
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2014/054798 WO2015128977A1 (ja) | 2014-02-27 | 2014-02-27 | テーパランド型スラスト軸受装置、及び、該軸受装置を備えるターボチャージャ |
Country Status (5)
Country | Link |
---|---|
US (1) | US10072707B2 (ja) |
EP (1) | EP3112706B1 (ja) |
JP (1) | JP6250786B2 (ja) |
CN (1) | CN105934593B (ja) |
WO (1) | WO2015128977A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPWO2017042925A1 (ja) * | 2015-09-10 | 2017-10-12 | 三菱重工業株式会社 | ターボチャージャの軸受装置、及びターボチャージャ |
CN111989501A (zh) * | 2018-04-18 | 2020-11-24 | 兼房株式会社 | 带凹部的工件及凹部的加工方法 |
WO2022168897A1 (ja) * | 2021-02-05 | 2022-08-11 | 三菱重工エンジン&ターボチャージャ株式会社 | スラスト軸受装置及びターボチャージャ |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3061750B1 (fr) * | 2017-01-10 | 2019-08-23 | Renault S.A.S | Butee fixe d'un systeme de butees fixe et tournante destine a supporter une charge axiale. |
DE102017216621A1 (de) * | 2017-09-20 | 2019-03-21 | Continental Automotive Gmbh | Rotor für einen Turbolader |
DE102018201963A1 (de) * | 2018-02-08 | 2019-08-08 | BMTS Technology GmbH & Co. KG | Keilloses, rotationssymmetrisches Axiallager |
GB2580180B (en) * | 2018-12-24 | 2022-11-09 | Cummins Ltd | Compressor seal system |
US11560900B2 (en) | 2020-06-09 | 2023-01-24 | Emerson Climate Technologies, Inc. | Compressor driveshaft assembly and compressor including same |
EP4047227A1 (de) * | 2021-02-19 | 2022-08-24 | Flender GmbH | Wellenanordnung, getriebe, industrie-applikation und computerprogrammprodukt |
CN113187877A (zh) * | 2021-05-11 | 2021-07-30 | 中国船舶重工集团公司第七0三研究所 | 一种用于高速重载斜齿轮传动系统的轴向力锥面止推结构 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2408938A1 (de) * | 1973-04-04 | 1974-10-10 | Sp K Bjuro Turbonagnetatelei | Axial-gleitlager |
JPH01133559U (ja) * | 1988-03-07 | 1989-09-12 | ||
JPH10213130A (ja) * | 1997-01-31 | 1998-08-11 | Mitsubishi Heavy Ind Ltd | すべり軸受 |
JP2011131289A (ja) * | 2009-12-22 | 2011-07-07 | Hamai Co Ltd | 平面ラップ/ポリッシュ盤 |
WO2013099600A1 (ja) * | 2011-12-27 | 2013-07-04 | 三菱重工業株式会社 | 過給機のスラスト軸受装置 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1494010A (en) * | 1924-05-13 | Thrust bearing | ||
AT74991B (de) * | 1915-12-14 | 1918-11-25 | En Der Maschinenfabriken Esche | Ringförmiges Spurlager mit mehreren der Hauptsache nach radial angeordneten Schmiernuten. |
GB829481A (en) * | 1956-01-16 | 1960-03-02 | Napier & Son Ltd | Rotary thrust bearings or fluid seals |
US3293931A (en) * | 1964-05-22 | 1966-12-27 | Ford Motor Co | Thrust bearings |
JPS5945850B2 (ja) * | 1979-07-13 | 1984-11-09 | 株式会社日立製作所 | スラスト軸受 |
JPS5887935U (ja) * | 1981-12-10 | 1983-06-15 | 石川島播磨重工業株式会社 | 過給機のスラスト軸受 |
EP0092920B1 (en) * | 1982-04-22 | 1987-03-04 | Holset Engineering Company Limited | Turbocharger |
DE4125165A1 (de) * | 1991-07-30 | 1993-02-04 | Hoechst Ceram Tec Ag | Gebranntes, keramisches erzeugnis mit strukturierter oberflaeche und verfahren zu seiner herstellung |
JP2003222123A (ja) * | 2002-01-25 | 2003-08-08 | Mitsubishi Heavy Ind Ltd | テーパランドスラスト軸受およびそれを備えた回転機械 |
US20060051000A1 (en) * | 2003-01-09 | 2006-03-09 | Izhak Etsion | Laser surface textured fluid-film bearing |
JP4511412B2 (ja) | 2005-05-11 | 2010-07-28 | 株式会社デンソー | スクロール型圧縮機 |
JP2008095903A (ja) | 2006-10-13 | 2008-04-24 | Ihi Corp | テクスチャを有するすべり軸受とその性能予測方法 |
JP2009197772A (ja) | 2008-02-25 | 2009-09-03 | Mitsubishi Heavy Ind Ltd | 排気ターボ過給機のスラスト軸受装置 |
BR102012022690A2 (pt) * | 2012-09-06 | 2014-06-10 | Whirlpool Sa | Mancal hidrodinâmico aplicado em interface de contato de compressor de fluidos baseado em mecanismo tipo espiral |
CN103277184B (zh) * | 2013-05-27 | 2015-09-09 | 北京理工大学 | 立式涡轮增压器 |
CN103422976A (zh) * | 2013-08-05 | 2013-12-04 | 天津机辆轨道交通装备有限责任公司 | 适用于焦炉煤气内燃机用燃机涡轮增压器 |
-
2014
- 2014-02-27 US US15/113,894 patent/US10072707B2/en active Active
- 2014-02-27 JP JP2016504922A patent/JP6250786B2/ja active Active
- 2014-02-27 WO PCT/JP2014/054798 patent/WO2015128977A1/ja active Application Filing
- 2014-02-27 EP EP14884172.9A patent/EP3112706B1/en active Active
- 2014-02-27 CN CN201480074123.8A patent/CN105934593B/zh active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2408938A1 (de) * | 1973-04-04 | 1974-10-10 | Sp K Bjuro Turbonagnetatelei | Axial-gleitlager |
JPH01133559U (ja) * | 1988-03-07 | 1989-09-12 | ||
JPH10213130A (ja) * | 1997-01-31 | 1998-08-11 | Mitsubishi Heavy Ind Ltd | すべり軸受 |
JP2011131289A (ja) * | 2009-12-22 | 2011-07-07 | Hamai Co Ltd | 平面ラップ/ポリッシュ盤 |
WO2013099600A1 (ja) * | 2011-12-27 | 2013-07-04 | 三菱重工業株式会社 | 過給機のスラスト軸受装置 |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPWO2017042925A1 (ja) * | 2015-09-10 | 2017-10-12 | 三菱重工業株式会社 | ターボチャージャの軸受装置、及びターボチャージャ |
EP3249192A4 (en) * | 2015-09-10 | 2018-08-01 | Mitsubishi Heavy Industries, Ltd. | Bearing device for turbocharger, and turbocharger |
CN111989501A (zh) * | 2018-04-18 | 2020-11-24 | 兼房株式会社 | 带凹部的工件及凹部的加工方法 |
CN111989501B (zh) * | 2018-04-18 | 2022-08-02 | 兼房株式会社 | 带凹部的工件及凹部的加工方法 |
WO2022168897A1 (ja) * | 2021-02-05 | 2022-08-11 | 三菱重工エンジン&ターボチャージャ株式会社 | スラスト軸受装置及びターボチャージャ |
DE112022000286T5 (de) | 2021-02-05 | 2023-09-14 | Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. | Drucklagervorrichtung und turbolader |
JP7506002B2 (ja) | 2021-02-05 | 2024-06-25 | 三菱重工エンジン&ターボチャージャ株式会社 | スラスト軸受装置及びターボチャージャ |
Also Published As
Publication number | Publication date |
---|---|
JPWO2015128977A1 (ja) | 2017-03-30 |
EP3112706B1 (en) | 2021-08-25 |
CN105934593A (zh) | 2016-09-07 |
US20160348721A1 (en) | 2016-12-01 |
EP3112706A1 (en) | 2017-01-04 |
EP3112706A4 (en) | 2017-03-01 |
JP6250786B2 (ja) | 2017-12-20 |
CN105934593B (zh) | 2018-10-09 |
US10072707B2 (en) | 2018-09-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6250786B2 (ja) | テーパランド型スラスト軸受装置、及び、該軸受装置を備えるターボチャージャ | |
JP6250787B2 (ja) | 浮動ブッシュ軸受装置、及び、該軸受装置を備えるターボチャージャ | |
JP6405473B2 (ja) | ターボチャージャの軸受装置、及びターボチャージャ | |
JP5524427B2 (ja) | 過給機のスラスト軸受装置 | |
US10473207B2 (en) | Oil-drain device for thrust bearing device and turbocharger provided with the same | |
KR101117943B1 (ko) | 전동 과급기 | |
WO2017046842A1 (ja) | ターボチャージャ | |
US8317400B2 (en) | High performance thrust bearing pad | |
JP6222613B2 (ja) | 開閉弁装置、及び回転機械 | |
JPS58190524A (ja) | タ−ボチヤ−ジヤ | |
US20050066657A1 (en) | Variable geometry turbocharger | |
EP3163018A1 (en) | Turbine | |
EP2966280A1 (en) | Turbocharger | |
WO2017010450A1 (ja) | 多円弧軸受および過給機 | |
US20150330240A1 (en) | Turbocharger outboard purge seal | |
US11236669B2 (en) | Turbine and turbocharger | |
WO2020250635A1 (ja) | 過給機 | |
JP5974501B2 (ja) | ターボ機械の可変静翼機構 | |
WO2022168897A1 (ja) | スラスト軸受装置及びターボチャージャ | |
US20230272738A1 (en) | Turbine and turbocharger | |
JP6125277B2 (ja) | ガスタービン | |
JP2020051393A (ja) | 排気ターボ過給機の軸受の構造 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14884172 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2016504922 Country of ref document: JP Kind code of ref document: A |
|
REEP | Request for entry into the european phase |
Ref document number: 2014884172 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2014884172 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15113894 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |