WO2014097417A1 - 浮動ブッシュ軸受装置及びこれを備える過給機 - Google Patents
浮動ブッシュ軸受装置及びこれを備える過給機 Download PDFInfo
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- WO2014097417A1 WO2014097417A1 PCT/JP2012/082893 JP2012082893W WO2014097417A1 WO 2014097417 A1 WO2014097417 A1 WO 2014097417A1 JP 2012082893 W JP2012082893 W JP 2012082893W WO 2014097417 A1 WO2014097417 A1 WO 2014097417A1
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- WIPO (PCT)
- Prior art keywords
- floating bush
- peripheral surface
- bush
- inner peripheral
- floating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
- F16C17/028—Sliding-contact bearings for exclusively rotary movement for radial load only with fixed wedges to generate hydrodynamic pressure, e.g. multi-lobe bearings
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- 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
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- 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
- F01D25/18—Lubricating arrangements
- F01D25/183—Sealing means
- F01D25/186—Sealing means for sliding contact bearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/053—Shafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
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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
- 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
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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
- F16C33/02—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
- F16C33/1045—Details of supply of the liquid to 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
- 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
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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
- F16C33/02—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
- F16C33/1085—Channels or passages to recirculate the liquid in the bearing
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- 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
- F05D2260/00—Function
- F05D2260/98—Lubrication
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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
- F16C2360/00—Engines or pumps
- F16C2360/23—Gas turbine engines
- F16C2360/24—Turbochargers
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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
- F16C2360/00—Engines or pumps
- F16C2360/44—Centrifugal pumps
Definitions
- the present disclosure relates to a floating bush bearing device that rotatably supports a rotating shaft, and a supercharger including the floating bush bearing device.
- a floating bush bearing device in which a floating bush is rotatably disposed between a bearing housing and a rotating shaft (see, for example, Patent Document 1).
- This floating bush bearing device forms an oil film by supplying lubricating oil to the clearance between the bearing housing and the floating bush, and the clearance between the floating bush and the rotation shaft, and the rotation shaft is formed by the oil film formed in these clearances. It is comprised so that rotation may be supported.
- the rotary shaft, the inner and outer peripheral surfaces of the floating bush, and the cross-sectional shape of the inner peripheral surface of the bearing housing are each formed in a circular shape.
- the present inventors have found that with such a conventional floating bush bearing device, asynchronous vibration that is not synchronized with the rotation of the rotating shaft is likely to occur. This asynchronous vibration may occur more significantly in, for example, a small turbocharger mounted on an automobile engine.
- At least one embodiment of the present invention has been made in view of the problems of the prior art as described above, and the object thereof is a floating bush bearing device having excellent vibration stability and low bearing loss, and It is providing the supercharger provided with this floating bush bearing apparatus.
- At least one embodiment of the floating bush bearing device of the present invention includes: In the floating bush bearing device that rotatably supports the rotating shaft, A bearing housing; A floating bush rotatably disposed between the rotary shaft and the inner peripheral surface of the bearing housing in the bearing housing; A bush-side oil supply hole penetrating the floating bush and capable of supplying lubricating oil between the rotating shaft and the inner peripheral surface of the floating bush, An inner peripheral surface of the floating bush is formed in a non-circular shape, whereby a gap portion having a predetermined gap or more is provided between the rotating shaft and the inner peripheral surface of the floating bush regardless of the relative position of both. And the bush side oil supply hole is formed in communication with the gap.
- the inner peripheral surface of the floating bush is formed in a non-circular shape, and the gap between the inner peripheral surface of the floating bush and the rotating shaft is formed unevenly in the circumferential direction. Regardless of the relative position, a gap portion having a predetermined gap or more is formed. For this reason, the cross term is relatively reduced with respect to the bearing dynamic characteristic direct term, and the vibration stability of the bearing device is improved. Further, since the average clearance between the inner peripheral surface of the floating bush and the rotating shaft is increased, the bearing loss can be reduced as compared with the case where the inner peripheral surface of the floating bush is formed in a perfect circle shape.
- the bush side oil supply hole is formed in communication with the gap portion, the oil supply characteristic inside the floating bush is improved, the vibration stability is improved, and the bearing loss can be reduced.
- the inner peripheral surface of the floating bush is formed in a multi-arc shape or an elliptical shape formed by combining a plurality of arcs having different center points.
- the inner peripheral surface of the floating bush having the non-circular shape described above can be easily configured geometrically.
- the gap between the rotating shaft and the inner peripheral surface of the floating bush can be gradually changed as compared with the case where the inner peripheral surface of the floating bush is formed in an uneven shape.
- the bearing housing On the inner peripheral surface of the bearing housing, recesses having different areas are formed in the load direction of the rotary shaft and in the direction opposite to the load direction, and the bearing housing includes a recess having a larger area.
- a housing-side oil supply hole capable of supplying lubricating oil communicates between the outer peripheral surface of the floating bush and the inner peripheral surface of the bearing housing.
- the recesses function as an oil reservoir, and the oil supply characteristics inside the floating bush are improved.
- An oil groove is formed on the inner peripheral surface of the bearing housing to connect two concave portions formed in the load direction of the rotary shaft and in the direction opposite to the load direction.
- the housing-side oil supply hole communicates with a first recess formed on the inner peripheral surface of the bearing housing in a direction opposite to the load direction of the rotating shaft.
- the rotary shaft since the housing-side oil supply hole communicates with the first recess formed in the direction opposite to the load direction of the rotary shaft, the rotary shaft has its load caused by the above-described difference in the oil supply pressure. It is further pressed toward the direction of action. This further increases the eccentricity of the floating bush and improves the vibration stability of the bearing.
- the housing-side oil supply hole communicates with a second recess formed in the load direction of the rotary shaft on the inner peripheral surface of the bearing housing.
- a circumferential groove provided along the circumferential direction is formed on the outer peripheral surface of the floating bush.
- the friction torque on the outer peripheral surface of the floating bush is reduced and the rotational speed of the floating bush is increased, so that the bearing loss inside the floating bush can be reduced.
- the damping effect of the lubricating oil film is enhanced by the squeezing effect by the circumferential groove, vibration stability is also improved.
- a plurality of partial grooves are formed on the outer peripheral surface of the floating bush, and the bush-side oil supply holes communicate with the partial grooves.
- the oil supply characteristic inside the floating bush is improved, the vibration stability is improved, and the bearing loss can be reduced.
- the partial groove is formed in a plane V shape in which two groove portions extending obliquely in different directions with respect to the axial direction intersect, and the opening side of the V shape is the rotational direction side of the floating bush.
- the bush side oil supply holes communicate with the intersecting portions of the two groove portions.
- At least one embodiment of the supercharger of the present invention is: A rotation axis; A compressor rotor coupled to one end of the rotating shaft; The floating bush bearing device according to the above-described embodiment that rotatably supports the rotating shaft is provided.
- FIG. 1 is a cross-sectional view showing a floating bush bearing device according to an embodiment of the present invention.
- the floating bush bearing device 1 a of the present embodiment includes a bearing housing 10 and a floating bush 20, and is configured to rotatably support a rotating shaft R.
- the bearing housing 10 is formed in a cylindrical cross section as shown in FIG.
- a first recess 14a is formed on the inner peripheral surface 10a at the upper position in the figure, and a second recess 14b is formed on the opposite side in the circumferential direction.
- the first recess 14a and the second recess 14b are formed in different areas.
- the area of the first recess 14a is larger in both.
- An arrow F in the figure indicates the load direction of the rotation axis R, and the second recess 14b described above is formed in the load direction F of the bearing housing inner peripheral surface 10a.
- the bearing housing 10 of FIG. 1 is formed such that the width Ba of the first recess 14a is larger than the width Bb of the second recess 14b. Further, the length La of the first recess 14a and the length Lb of the second recess 14b are formed to be equal. Thereby, the area Aa of the first recess 14a is formed larger than the area Ab of the second recess 14b.
- the first recess 14 a and the second recess 14 b are connected to each other by an oil groove 16 formed in the circumferential direction on the inner peripheral surface 10 a of the bearing housing 10.
- the housing side oil supply hole 12 penetrates the bearing housing 10 in the radial direction.
- the pressurized lubricating oil is supplied between the outer peripheral surface 20b of the floating bush 20 and the inner peripheral surface 10a of the bearing housing 10 via the housing-side oil supply hole 12, and an oil film is formed between the two. It is like that.
- the housing-side oil supply hole 12 communicates with the first recess 14a having a large area, and the oil recess 16 described above, the bearing housing inner peripheral surface 10a, and the floating bush are connected to the second recess 14b.
- Lubricating oil is supplied through a gap in the outer peripheral surface 20a. For this reason, the hydraulic pressure of the first recess 14a is higher than the hydraulic pressure of the second recess 14b.
- the supply hydraulic pressure at which the first recess 14a pushes down the floating bush 20 (the hydraulic pressure in the first recess 14a ⁇ the first Is configured to be larger than the hydraulic pressure at which the second recess 14b pushes up the floating bush 20 (the hydraulic pressure in the second recess 14b ⁇ the area of the second recess 14b).
- the floating bush 20 is disposed inside the bearing housing 10 between the rotary shaft R and the inner peripheral surface 10 a of the bearing housing 10. And it is arrange
- the floating bush 20 is formed in a multi-circular shape formed by combining three circular arc portions 20A each having an inner peripheral surface 20a having different center points. And even if it is a case where the rotating shaft R which consists of a circular cross section moves the inside of the floating bush 20 as shown with the dashed-two dotted line in a figure, regardless of relative position of both, the rotating shaft R and a floating bush are used.
- a gap portion g having a predetermined gap or more is formed between the inner peripheral surface 20a of the twenty.
- the bushing side oil supply hole 22 penetrates the floating bush 20 in the radial direction and communicates with the gap g described above.
- the lubricating oil supplied to the clearance between the floating bush outer peripheral surface 20b and the bearing housing inner peripheral surface 10a also enters the clearance between the rotary shaft R and the floating bush inner peripheral surface 20a via the bush-side oil supply hole 2.
- An oil film is formed in the gap between the two.
- the bush-side oil supply hole 22 is formed so as to communicate with the gap g, so that the lubricating oil is stably supplied to the inside of the floating bush 20 regardless of the position of the rotating shaft R.
- the three arc portions 20A described above have outer peripheral surfaces 20b having different center points.
- a gap g ′ having a predetermined gap or more is formed between the inner peripheral surface 10 a of the bearing housing 10 and the outer peripheral surface 20 b of the floating bush 20 regardless of the position of the floating bush 20.
- the bush side oil supply hole 22 mentioned above is formed in communication with this gap
- the inner peripheral surface 20a of the floating bush 20 is formed in a noncircular shape having a multi-arc shape, and the floating bush 20
- the gap between the inner peripheral surface 20a and the rotation axis R is formed unevenly in the circumferential direction.
- interval part g which has a predetermined gap or more irrespective of both relative position is formed.
- the cross term is relatively reduced with respect to the bearing dynamic characteristic direct term, and the vibration stability of the bearing device is improved.
- the average gap between the rotary shaft R and the inner peripheral surface 20a of the floating bush 20 is increased, the bearing loss can be reduced as compared with the case where the floating bush inner peripheral surface 20a is formed in a perfect circle shape.
- the bush-side oil supply hole 22 is formed in communication with the gap portion g, the oil supply characteristic inside the floating bush 20 is improved, the vibration stability is improved, and the bearing loss is reduced. I can do it.
- the housing-side oil supply hole 12 communicates with the first recess 14a having a large area, it floats due to the difference in the oil supply pressure between the two recesses, the first recess 14a and the second recess 14b.
- the bush 20 is pressed toward the second recess 14b. As a result, the eccentricity of the floating bush 20 is increased, and the vibration stability is improved.
- the first recess 14a and the second recess 14b function as an oil reservoir, respectively.
- the oil supply characteristic inside 20 is improved.
- the housing-side oil supply hole 12 communicates with the first recess 14 a formed in the direction opposite to the load direction F of the rotation shaft R. For this reason, the rotating shaft R is further pressed toward the load direction F due to the difference in hydraulic pressure between the first recess 14a and the second recess 14b. As a result, the eccentricity of the floating bush 20 is further increased, and the vibration stability of the bearing can be improved.
- the housing-side oil supply hole 12 is configured to communicate with the second recess 14b formed in the load direction F of the rotating shaft R. You can also. According to such a configuration, since the housing-side oil supply hole 12 communicates with the second recess 14b formed in the load direction F of the rotating shaft R, the pressure supplied from the housing-side oil supply hole 12 is increased. The floating bush 20 is lifted by the lubricating oil. As a result, an oil film is formed in the gap between the inner peripheral surface 10a of the bearing housing 10 and the outer peripheral surface 20b of the floating bush 20 at an early stage, so that the bearing loss at the start of rotation is reduced and the startability is improved.
- the gap between the inner peripheral surface 10a of the bearing housing 10 and the outer peripheral surface 20b of the floating bush 20 is formed unevenly in the circumferential direction, and the gap portion g ′ described above is formed in the gap between the two. ing.
- the floating bush bearing device 1 of the present invention is not limited to this. If at least the gap between the rotating shaft R and the inner peripheral surface 20a of the floating bush 20 is formed unevenly and the gap g described above is formed in the gap between the two, the floating bush bearing device 1c shown in FIG. As described above, the gap between the inner peripheral surface 10a of the bearing housing 10 and the outer peripheral surface 20b of the floating bush 20 may be formed uniformly in the circumferential direction.
- the floating bush 20 is formed in a multi-arc shape configured by combining three arc portions 20A each having an inner peripheral surface 20a having a different center point.
- the floating bush bearing device 1 of the present invention is not limited to this, and can be configured by appropriately combining an appropriate number of arc portions.
- the number of arc portions to be combined is preferably in the range of 2 to 5 from the viewpoint of manufacturability.
- FIG. 5 shows an example of a floating bush bearing device 1d having a floating bush 20 configured by combining two arc portions 20B each having an inner peripheral surface 20a having different center points.
- the inner peripheral surface 20a of the floating bush 20 can be formed in an elliptical shape.
- the inner peripheral surface 20a of the floating bush 20 having the non-circular shape described above can be easily configured geometrically. Further, for example, the gap between the rotation shaft R and the inner peripheral surface 20a of the floating bush 20 can be gradually changed as compared with the case where the inner peripheral surface 20a of the floating bush 20 is formed in an uneven shape.
- FIG. 7 is a longitudinal sectional view showing a floating bush according to a floating bush bearing device according to an embodiment of the present invention.
- the floating bush 20 according to the present embodiment has basically the same configuration as the floating bush 20 of the above-described embodiment, and the same reference numerals are given to the same configuration, and detailed description thereof is omitted. .
- the floating bush 20 of the present embodiment is formed with a circumferential groove 24 provided along the circumferential direction on the outer circumferential surface 20 b.
- the circumferential groove 24 is preferably formed continuously over the entire circumference of the outer peripheral surface 20b, but there may be a portion where the circumferential groove 24 is not partially formed in the circumferential direction.
- the number of circumferential grooves 24 is not particularly limited. In the example shown in FIG. 7, for example, one circumferential groove 24 is continuously formed over the entire circumference of the outer peripheral surface 20 b of the floating bush 20.
- the bush-side oil supply hole 22 described above may be provided in communication with the circumferential groove 24.
- FIG. 8 is an external view showing a floating bush according to an embodiment of the present invention.
- the floating bush 20 according to the present embodiment has basically the same configuration as the floating bush 20 of the above-described embodiment, and the same reference numerals are given to the same configuration, and detailed description thereof is omitted. .
- the floating bush 20 of the present embodiment has a plurality of partial grooves 26a formed on the outer peripheral surface 20b.
- the partial groove 26a is formed in a plane V shape in which two grooves 27a and 28a extending obliquely in different directions with respect to the axial direction intersect each other. Further, the partial groove 26a is oriented so that the rotation direction side thereof is the V-shaped opening side with respect to the rotation direction r of the floating bush 20. And the bush side oil supply hole 22 mentioned above communicates and is provided in the cross
- the lubricating oil easily gathers at the intersection through the grooves 27a and 28a. And since the bush side oil supply hole 22 is connected to the intersection where this lubricating oil is easy to gather, the oil supply characteristic inside the floating bush 20 is further improved.
- the embodiment of the partial groove 26 is not limited to the embodiment of the partial groove 26a shown in FIG.
- the above-described bush-side oil supply hole 22 communicates with the position on the opposite side with respect to the rotational direction r of the floating bush 20 in the elongated partial groove 26b, As the floating bush 20 rotates, the lubricating oil easily collects in the bush-side oil supply holes 22, and the oil supply characteristics inside the floating bush 20 are further improved.
- FIG. 10 is a schematic view showing an embodiment of a supercharger equipped with the floating bush bearing device of the present invention.
- the supercharger 100 of the present embodiment is capable of rotating the rotating shaft R, the compressor rotor 102 and the turbine rotor 104 connected to both ends of the rotating shaft R, and the rotating shaft R, respectively.
- the turbocharger 100a includes the above-described floating bush bearing device 1 to be supported.
- the compressor rotor 102 is disposed in the intake passage of the engine.
- the turbine rotor 104 is disposed in the exhaust passage of the engine. Then, the turbine rotor 104 is rotated by the exhaust gas discharged from the engine, and the compressor rotor 102 is coaxially driven along with this, so that the air flowing through the intake passage is compressed and the supercharged air is supplied to the engine. Is done.
- the supercharger 100 of this invention is not limited to the turbocharger 100a mentioned above.
- an electric motor 106 may be provided in place of the turbine rotor 104, and the electric rotor 106 may be configured as an electric supercharger 100 b that is driven by the compressor rotor 102 when the rotation shaft R is rotated by the electric motor 106. It is.
- At least one embodiment of the present invention is suitably used as a floating bush bearing device that rotatably supports a rotating shaft, for example, in a small turbocharger mounted on an automobile engine.
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- 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)
- Sliding-Contact Bearings (AREA)
- Supercharger (AREA)
- Support Of The Bearing (AREA)
Abstract
Description
回転軸を回転可能に支持する浮動ブッシュ軸受装置において、
軸受ハウジングと、
前記軸受ハウジングの内部において、前記回転軸と前記軸受ハウジングの内周面との間に回転可能に配置された浮動ブッシュと、
前記浮動ブッシュを貫通し、前記回転軸と前記浮動ブッシュの内周面との間に潤滑油を供給可能なブッシュ側給油孔と、を備え、
前記浮動ブッシュの内周面は非円形状に形成され、これにより、前記回転軸と前記浮動ブッシュの内周面との間には、両者の相対位置に関わらず所定以上の隙間を有する間隙部が形成されるとともに、該間隙部と連通して、前記ブッシュ側給油孔が形成されていることを特徴とする。
前記浮動ブッシュの内周面は、中心点の異なる複数の円弧を組み合わせて構成した多円弧形状、又は楕円形状に形成されている。
前記軸受ハウジングの内周面において、前記回転軸の荷重方向及び該荷重方向と反対方向にはそれぞれ面積の異なる凹部が形成されており、この内、面積の大きい方の凹部には、前記軸受ハウジングを貫通し、前記浮動ブッシュの外周面と前記軸受ハウジングの内周面との間に潤滑油を供給可能なハウジング側給油孔が連通している。
前記軸受ハウジングの内周面には、前記回転軸の荷重方向及び該荷重方向と反対方向にそれぞれ形成されている2つの凹部を接続する油溝が形成されている。
前記ハウジング側給油孔は、前記軸受ハウジングの内周面において、前記回転軸の荷重方向と反対方向に形成されている第1の凹部に連通している。
前記ハウジング側給油孔は、前記軸受ハウジングの内周面において、前記回転軸の荷重方向に形成されている第2の凹部に連通している。
前記浮動ブッシュの外周面には、周方向に沿って設けられた周方向溝が形成されている。
前記浮動ブッシュの外周面には、複数の部分溝が形成されており、前記ブッシュ側給油孔は、前記部分溝に連通している。
前記部分溝は、軸方向に対してそれぞれ異なる方向に斜めに延伸する2条の溝部が交差してなる平面V字状に形成され、該V字の開口側が前記浮動ブッシュの回転方向側となるように配向されるとともに、前記ブッシュ側給油孔は、前記2条の溝部の交差部に連通している。
回転軸と、
前記回転軸の一端部に連結されたコンプレッサロータと、
前記回転軸を回転可能に支持する上述した実施形態にかかる浮動ブッシュ軸受装置と、を少なくとも備えることを特徴とする。
ただし、本発明の範囲は以下の実施形態に限定されるものではない。以下の実施形態に記載されている構成部品の寸法、材質、形状、その相対配置などは、本発明の範囲をそれにのみ限定する趣旨ではなく、単なる説明例に過ぎない。
10 軸受ハウジング
10a 軸受ハウジング内周面
12 ハウジング側給油孔
14a,14b 凹部
16 油溝
20 浮動ブッシュ
20a 浮動ブッシュ内周面
20b 浮動ブッシュ外周面
20A,20B 円弧部
22 ブッシュ側給油孔
24 周方向溝
26a,26b 部分溝
27a,28a 溝部
100 過給機
100a ターボチャージャ
100b 電動過給機
102 コンプレッサロータ
104 タービンロータ
106 電動機
Claims (10)
- 回転軸を回転可能に支持する浮動ブッシュ軸受装置において、
軸受ハウジングと、
前記軸受ハウジングの内部において、前記回転軸と前記軸受ハウジングの内周面との間に回転可能に配置された浮動ブッシュと、
前記浮動ブッシュを貫通し、前記回転軸と前記浮動ブッシュの内周面との間に潤滑油を供給可能なブッシュ側給油孔と、を備え、
前記浮動ブッシュの内周面は非円形状に形成され、これにより、前記回転軸と前記浮動ブッシュの内周面との間には、両者の相対位置に関わらず所定以上の隙間を有する間隙部が形成されるとともに、該間隙部と連通して、前記ブッシュ側給油孔が形成されていることを特徴とする浮動ブッシュ軸受装置。 - 前記浮動ブッシュの内周面は、中心点の異なる複数の円弧を組み合わせて構成した多円弧形状、又は楕円形状に形成されていることを特徴とする請求項1に記載の浮動ブッシュ軸受装置。
- 前記軸受ハウジングの内周面において、前記回転軸の荷重方向及び該荷重方向と反対方向にはそれぞれ面積の異なる凹部が形成されており、この内、面積の大きい方の凹部には、前記軸受ハウジングを貫通し、前記浮動ブッシュの外周面と前記軸受ハウジングの内周面との間に潤滑油を供給可能なハウジング側給油孔が連通していることを特徴とする請求項1または2に記載の浮動ブッシュ軸受装置。
- 前記軸受ハウジングの内周面には、前記回転軸の荷重方向及び該荷重方向と反対方向にそれぞれ形成されている2つの凹部を接続する油溝が形成されていることを特徴とする請求項3に記載の浮動ブッシュ軸受装置。
- 前記ハウジング側給油孔は、前記軸受ハウジングの内周面において、前記回転軸の荷重方向と反対方向に形成されている第1の凹部に連通していることを特徴とする請求項3または4に記載の浮動ブッシュ軸受装置。
- 前記ハウジング側給油孔は、前記軸受ハウジングの内周面において、前記回転軸の荷重方向に形成されている第2の凹部に連通していることを特徴とする請求項3または4に記載の浮動ブッシュ軸受装置。
- 前記浮動ブッシュの外周面には、周方向に沿って設けられた周方向溝が形成されていることを特徴とする請求項1から6のいずれか一項に記載の浮動ブッシュ軸受装置。
- 前記浮動ブッシュの外周面には、複数の部分溝が形成されており、前記ブッシュ側給油孔は、前記部分溝に連通していることを特徴とする請求項1から6のいずれか一項に記載の浮動ブッシュ軸受装置。
- 前記部分溝は、軸方向に対してそれぞれ異なる方向に斜めに延伸する2条の溝部が交差してなる平面V字状に形成され、該V字の開口側が前記浮動ブッシュの回転方向側となるように配向されるとともに、前記ブッシュ側給油孔は、前記2条の溝部の交差部に連通していることを特徴とする請求項8に記載の浮動ブッシュ軸受装置。
- 回転軸と、
前記回転軸の一端部に連結されたコンプレッサロータと、
前記回転軸を回転可能に支持する請求項1から9のいずれか一項に記載の浮動ブッシュ軸受装置と、を少なくとも備えることを特徴とする過給機。
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201280077265.0A CN104813044B (zh) | 2012-12-19 | 2012-12-19 | 浮动衬套轴承装置以及具有该浮动衬套轴承装置的增压器 |
| PCT/JP2012/082893 WO2014097417A1 (ja) | 2012-12-19 | 2012-12-19 | 浮動ブッシュ軸受装置及びこれを備える過給機 |
| EP16174154.1A EP3098465B1 (en) | 2012-12-19 | 2012-12-19 | Floating bush bearing device and supercharger including the same |
| US14/650,811 US9885384B2 (en) | 2012-12-19 | 2012-12-19 | Floating bush bearing device and supercharger including the same |
| EP12890467.9A EP2937582B1 (en) | 2012-12-19 | 2012-12-19 | Floating bush bearing device and supercharger provided with same |
| JP2014501362A JP5730436B2 (ja) | 2012-12-19 | 2012-12-19 | 浮動ブッシュ軸受装置及びこれを備える過給機 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2012/082893 WO2014097417A1 (ja) | 2012-12-19 | 2012-12-19 | 浮動ブッシュ軸受装置及びこれを備える過給機 |
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| WO2014097417A1 true WO2014097417A1 (ja) | 2014-06-26 |
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| PCT/JP2012/082893 Ceased WO2014097417A1 (ja) | 2012-12-19 | 2012-12-19 | 浮動ブッシュ軸受装置及びこれを備える過給機 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9885384B2 (ja) |
| EP (1) | EP2937582B1 (ja) |
| JP (1) | JP5730436B2 (ja) |
| CN (1) | CN104813044B (ja) |
| WO (1) | WO2014097417A1 (ja) |
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| CN105940229B (zh) | 2014-02-27 | 2018-09-28 | 三菱重工发动机和增压器株式会社 | 浮动衬套轴承装置以及具有该轴承装置的涡轮增压器 |
| GB201507390D0 (en) * | 2015-04-30 | 2015-06-17 | Rolls Royce Plc | Transfer couplings |
| JPWO2017010450A1 (ja) * | 2015-07-16 | 2018-04-19 | 株式会社Ihi | 多円弧軸受および過給機 |
| CN108779801B (zh) * | 2016-02-02 | 2021-03-09 | 博格华纳公司 | 轴承及其制造和使用过程 |
| CN105697548A (zh) * | 2016-05-03 | 2016-06-22 | 袁静 | 一种轴套 |
| DE102016111757B3 (de) * | 2016-06-27 | 2017-09-14 | Ks Gleitlager Gmbh | Gleitlagerbuchse |
| DE102017211046A1 (de) | 2017-06-29 | 2019-01-03 | Robert Bosch Gmbh | Verfahren zum Herstellen von Bauteilen eines Kippsegmentlagers und Kippsegmentlager |
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| CN216158100U (zh) * | 2018-06-28 | 2022-04-01 | 博格华纳公司 | 轴承元件和涡轮增压器轴承系统 |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2937582A4 (en) | 2015-12-02 |
| EP2937582B1 (en) | 2016-11-30 |
| US20150330442A1 (en) | 2015-11-19 |
| CN104813044A (zh) | 2015-07-29 |
| CN104813044B (zh) | 2017-05-17 |
| US9885384B2 (en) | 2018-02-06 |
| JPWO2014097417A1 (ja) | 2017-01-12 |
| EP2937582A1 (en) | 2015-10-28 |
| JP5730436B2 (ja) | 2015-06-10 |
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