WO2011013536A1 - 旋回軸受および風車の旋回部支持装置 - Google Patents
旋回軸受および風車の旋回部支持装置 Download PDFInfo
- Publication number
- WO2011013536A1 WO2011013536A1 PCT/JP2010/062165 JP2010062165W WO2011013536A1 WO 2011013536 A1 WO2011013536 A1 WO 2011013536A1 JP 2010062165 W JP2010062165 W JP 2010062165W WO 2011013536 A1 WO2011013536 A1 WO 2011013536A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spacer
- wind turbine
- slewing bearing
- ball
- bearing
- 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0204—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor for orientation in relation to wind direction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/70—Bearing or lubricating arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
- F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/20—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows with loose spacing bodies, e.g. balls, between the bearing balls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/37—Loose spacing bodies
- F16C33/3706—Loose spacing bodies with concave surfaces conforming to the shape of the rolling elements, e.g. the spacing bodies are in sliding contact with the rolling elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/50—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
- F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
- F16C2208/20—Thermoplastic resins
- F16C2208/60—Polyamides [PA]
-
- 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
- F16C2210/00—Fluids
- F16C2210/02—Fluids defined by their properties
- F16C2210/04—Fluids defined by their properties by viscosity
-
- 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
- F16C2220/00—Shaping
- F16C2220/02—Shaping by casting
- F16C2220/04—Shaping by casting by injection-moulding
-
- 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
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/10—Application independent of particular apparatuses related to size
- F16C2300/14—Large applications, e.g. bearings having an inner diameter exceeding 500 mm
-
- 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
- F16C2360/31—Wind motors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Definitions
- the present invention relates to, for example, a turning part for a yaw and blade of a wind power generator, a turning bearing used as a turning seat for a deck crane and the like, and a turning part support device for a windmill.
- Slewing bearings used in yaw of wind turbines (wind power generators) for wind power generation, rotating parts for blades, and the like have been put into practical use.
- a wind power generator it is necessary to change the angle of a blade and the direction of a nacelle at any time according to a wind state.
- the blade and the nacelle are each supported by a swivel bearing so as to be swiveled, and are swung by driving means (not shown).
- a cage type of the slewing bearing there is a spacer type, that is, a rolling element separator type (Patent Document 1) or a cage type.
- Slewing bearings used for wind turbines receive radial loads and moment loads in addition to axial loads.
- a cage type used for a slewing bearing of a construction machine or a crane is a resin spacer type.
- Ball size used for slewing bearings for yaw and blades of large wind power generators with a power generation capacity of 1 MW or more is generally large, and a ball diameter exceeding 30 mm is often used. Since the resin spacer used for a ball having a diameter exceeding 30 mm is a thick product, voids are likely to be generated inside or on the surface of the resin spacer during injection molding.
- An object of the present invention is to provide a slewing bearing and a wind turbine slewing portion supporting device that can suppress incidental expenses such as mold costs and can solve the lack of strength due to voids.
- the slewing bearing of the present invention is a slewing bearing in which a raceway groove is formed in each of the inner ring and the outer ring, and a plurality of balls and a spacer interposed between these balls are provided between the raceway grooves of the inner and outer rings,
- This slewing bearing is a four-point contact ball bearing in which the cross-sectional shape of each raceway groove is formed so that the ball contacts the inner surface of the raceway groove of the inner and outer rings, and the spacer is made of a resin material.
- the resin material had a melt viscosity at a temperature of 270 ° C. of 1000 Pa ⁇ s to 2000 Pa ⁇ s.
- the resin material of the spacer has a melt viscosity of 1000 Pa ⁇ s (temperature 270 ° C.) or more, generation of voids in the interior and surface of the spacer can be suppressed even when the spacer is thick. . This can prevent the spacer from becoming insufficient in strength. Since the size of the spacer is determined for each ball size, it can be used for various bearing sizes regardless of the ball PCD. For this reason, incidental expenses such as mold costs can be suppressed. Therefore, the manufacturing cost of the slewing bearing can be reduced. Moreover, since the ball is a four-point contact ball bearing in which the ball contacts the inner surface of the raceway groove of the inner and outer rings, an axial load in both directions can be applied.
- the spacer may have a concave shape in which the ball contact surfaces on both sides are deeply recessed toward the center, and the gate position of a mold for injection molding the spacer may be arranged at the bottom of the concave shape.
- the gate position of the mold is arranged at the outer diameter portion of the spacer, the void generation rate is increased, and the strength in the circumferential direction of the spacer (after the bearing is assembled) may be uneven.
- the gate position of the mold is arranged at the bottom of the concave shape, it is possible to reduce the incidence of voids and prevent the occurrence of bias in the circumferential strength of the spacer.
- the spacer has a concave shape in which the ball contact surfaces on both sides are deeply recessed as it reaches the center, and a recess is provided at the center of the recess in addition to the recess, and the gate of the mold for injection molding the spacer. You may provide a position in the said recessed part.
- the resin material of the spacer may be PA6.
- PA6 is a polyamide obtained by ring-opening polycondensation of caprolactam, and is also referred to as “nylon 6”.
- the diameter of the ball may be 30 mm or more and 80 mm or less.
- the product is thicker than a spacer used for a ball having a diameter of less than 30 mm. Even in such a thick spacer, since the resin material of the spacer has a melt viscosity of 1000 Pa ⁇ s (temperature 270 ° C.) or more, generation of voids in the spacer or on the surface is suppressed. Can be prevented from becoming insufficient in strength.
- the wind turbine blade is supported so as to be pivotable about the axis substantially perpendicular to the main shaft axis with respect to the main shaft, and the wind turbine nacelle is supported. It can be suitably used for pivotally supporting the table.
- the wind turbine swivel support device of the present invention supports the wind turbine blade by the swivel bearing so as to be pivotable about the axis substantially perpendicular to the main shaft axis with respect to the main shaft.
- the wind turbine blade can be swung around an axis substantially perpendicular to the main shaft axis, and can be controlled to an optimum turning angle in accordance with the wind condition.
- the wind turbine swivel support device of the present invention is such that the wind turbine nacelle is supported by the swivel bearing so as to be pivotable with respect to a support base. According to this configuration, the direction of the nacelle can be changed at any time according to the wind condition.
- This slewing bearing is, for example, a bearing that supports the blade of a wind turbine for wind power generation so that it can pivot about an axis substantially perpendicular to the main shaft axis or a nacelle of the wind turbine relative to a support base. Used as a bearing to support.
- the slewing bearing includes an inner ring 1, an outer ring 2, and a plurality of rows of rolling grooves interposed between the double row raceway grooves 1a, 1b, 2a and 2b of the inner and outer rings 1 and 2, respectively. , And spacers 4 interposed between the balls 3 in each row.
- Each of the raceway grooves 1a, 1b, 2a, 2b of the inner and outer rings 1, 2 is composed of two curved surfaces 1aa, 1ab, 1ba, 1bb, 2aa, 2ab, 2ba, 2bb.
- each raceway groove 1a, 1b, 2a, 2b are Gothic arch-shaped cross-sectional arcs each having a radius of curvature larger than that of the ball 3 and having different centers of curvature. Between a pair of curved surfaces constituting each track groove 1a, 1b, 2a, 2b, there are groove portions 1ac, 1bc, 2ac, 2bc.
- Each ball 3 is in contact with the curved surfaces of the inner ring raceway grooves 1a and 1b and the outer ring raceway grooves 2a and 2b at the contact points, and contacts the four points.
- a ball diameter of 30 mm or more and 80 mm or less is applied.
- This slewing bearing is configured as a four-point contact double row ball bearing.
- a plurality of bolt holes 5 in which female threads are formed are provided on the end surface of the outer ring 2 at regular intervals in the circumferential direction, and gears 6 are provided on the outer peripheral surface of the outer ring 2.
- the gear 6 is means for transmitting a turning driving force from a driving source (not shown) to the outer ring 2.
- the plurality of bolt holes 5 are holes for connecting and fixing the outer ring 2 to a support base or the like, for example.
- the inner ring 1 has a race ring main body 7 and plugs 8 and 8 fitted into insertion holes 9 and 9 (described later) of the race ring main body 7, and further includes a connector 10 and an annular seal member 11. Have.
- the bearing ring main body 7 and the upper and lower plugs 8 and 8 in FIG. 1 are concentrically arranged and have the same inner diameter and outer diameter.
- the raceway ring body 7 is formed with double rows of raceway grooves 1a and 1b, and the outer diameter surfaces of the plugs 8 and 8 form part of the circumferential direction of the raceway grooves 1a and 1b of each row.
- the distance between the raceway grooves 1a and 1b of the inner ring 1 and the distance between the raceway grooves 2a and 2b of the outer ring 2 are set to the same dimensions in design.
- Insertion holes 9, 9 are provided in the bearing ring main body 7 so as to penetrate in the bearing radial direction.
- Each through hole 9 is formed in a cylindrical hole shape (see FIG. 2B).
- the insertion holes 9 and 9 are arranged at positions close to the circumferential direction, that is, at a position where the phase angle ⁇ is 4 degrees to 5 degrees, for example.
- the phase angle ⁇ is not limited to 4 degrees to 5 degrees.
- the race ring main body 7 is provided with plugs 8 that are fitted into the respective insertion holes 9, and the plugs 8 are fixed to the race ring main body 7 by a connector 10.
- a taper pin is applied as the connector 10.
- the bearing ring body 7 and the plug 8 are formed with connecting holes 7a and 8a corresponding to the circumferential positions of the through holes 9, and the tapered pins are press-fitted into the connecting holes 7a and 8a in the axial direction.
- An annular groove 8b is formed on the outer peripheral surface of the stopper 8 that is located on the inner diameter side of the connecting hole 8a.
- An annular seal member 11 is fitted into the annular groove 8b to enhance the sealing performance of the plug 8 with respect to the insertion hole 9 of the bearing ring body 7.
- the annular seal member 11 is made of rubber such as an O-ring or an elastic body made of resin.
- the bearing spaces of the inner and outer rings 1 and 2 are filled with grease, and both ends in the axial direction of the bearing spaces are sealed by seal members or the like not shown.
- the spacer 4 is made of a resin material such as PA6, for example.
- a resin material such as PA6, for example.
- a melt viscosity at a temperature of 270 ° C. of 1000 Pa ⁇ s or more and 2000 Pa ⁇ s or less is adopted.
- the resin material is not limited to PA6, and PA66 and PA46 may be applied, and any resin material having a melt viscosity of 1000 Pa ⁇ s to 2000 Pa ⁇ s at a temperature of 270 ° C. is sufficient.
- the spacer 4 has a concave shape in which the ball contact surfaces 4a and 4a on both sides form a spherical surface that is deeply recessed toward the center.
- a recessed portion 4h that is further recessed than the recessed portion is provided in the central portion of the recessed surface.
- the gate position P1 of the injection mold 12 that forms the spacer 4 is defined as the recessed portion. 4h. In other words, the gate position P1 is arranged at the bottom of the ball contact surface 4a on one side. As shown in FIGS.
- the ball contact surfaces 4a and 4a on both sides of the spacer 4 have a single spherical shape slightly larger than the ball radius R of the ball 3 indicated by a dotted line in FIG. .
- the spherical surface including the ball contact surface 4a is represented by a solid line “R1”.
- the ball contact surface 4a is not limited to a spherical shape as will be described later.
- the mold 12 has an upper mold 13 and a lower mold 14.
- the cavity 15 is formed in a state where the upper mold 13 and the lower mold 14 are clamped.
- a gate G is provided in the upper mold 13, and a position where the gate G opens into the cavity 15 is the gate position P ⁇ b> 1.
- the resin material heated and melted in the cavity 15 is filled from an injection molding machine (not shown), controlled to a predetermined pressure, and cooled. Thereafter, the mold is opened, and the spacer 4 as a molded product is protruded from the mold 12.
- a plurality of cavities 15 may be formed in the mold 12 so that the plurality of spacers 4 can be molded simultaneously.
- FIG. 6 is a cross-sectional view for explaining a spacer crushing test method
- FIG. 7 is a diagram showing the relationship between the gate position, melt viscosity, and crushing load.
- the subject of examination is A material having a high melt viscosity according to the present application (for example, a melt viscosity of 1110 Pa ⁇ s at a temperature of 270 ° C.) and a gate position disposed in the recess, A material having a low melt viscosity of Comparative Example (1) (for example, a melt viscosity of 490 Pa ⁇ s at a temperature of 270 ° C.) and a gate position disposed in the recess, A material having a low melt viscosity of Comparative Example (2) (for example, a melt viscosity of 490 Pa ⁇ s at a temperature of 270 ° C.) and a gate position disposed on the outer diameter portion of the spacer, It is.
- a high melt viscosity according to the present application for example, a melt viscosity of 1110 Pa ⁇ s at a temperature of 270 ° C.
- Comparative Example (1) for example, a melt viscosity of 4
- this testing machine has a seat 16, a cylindrical member 17, and a pressing member 18.
- the seat 16 has a cylindrical seat body 16 a including a concave seat surface 16 aa that can support the steel ball 19.
- a flange portion 16b is provided radially outward from the outer periphery of the seat body 16a, and the flange portion 16b and the seat body 16a are placed and supported.
- the tubular member 17 is fitted to the outer periphery of the seat body 16a and is connected to the flange portion 16b by a plurality of bolts 20.
- the inner diameter of the cylindrical member 17 is larger than the spacer and the steel ball 19 to be tested by a predetermined size. Therefore, the spacer and the steel ball 19 can be inserted into the cylindrical member 17.
- the pressing member 18 includes a columnar pressing member main body 18a including a concave pressing surface 18aa that presses the steel ball 19 and a flange portion 18b.
- a spacer and one steel ball 19 to be tested are sequentially inserted through one steel ball 19 supported on the seat surface 16aa.
- the ball contact surfaces 4a, 4a on both sides of the spacer come into contact with the upper and lower steel balls 19, 19, respectively.
- the pressing member main body 18a is slidably inserted into the inside of the upper end side of the cylindrical member 17, and presses the upper steel ball 19 by the pressing surface 18aa. Therefore, a predetermined load can be applied to the spacer at a predetermined speed and the crushing load can be measured. In this crushing test method, a load was applied to the spacer at a speed of 1.6 kN / sec via the steel ball 19 and the crushing load was measured. However, the maximum load was 196 kN.
- the resin material is the spacer 4 having a melt viscosity of 1000 Pa ⁇ s (temperature 270 ° C.) or more, generation of voids in the spacer 4 can be suppressed. This can prevent the spacer 4 from becoming insufficient in strength. Since the size of the spacer 4 is determined for each ball size, it can be used for various bearing sizes regardless of the ball PCD, that is, the ball pitch circle diameter. For this reason, incidental expenses such as mold costs can be suppressed. Therefore, the manufacturing cost of the slewing bearing can be reduced.
- the gate position P1 of the mold 12 is arranged in the recess 4h, it is possible to reduce the occurrence rate of voids inside and on the surface of the spacer 4 and to cause unevenness in the strength of the spacer 4 in the circumferential direction. Can be prevented.
- the diameter of the ball 3 is 40 mm or more. In the case of the spacer 4 used for the ball 3 having such a diameter, the product is thicker than the spacer 4 used for a ball having a diameter of less than 40 mm.
- the resin material of the spacer 4 has a melt viscosity of 1000 Pa ⁇ s (temperature 270 ° C.) or more, generation of voids in the spacer 4 or on the surface is suppressed.
- the spacer 4 can be prevented from becoming insufficient in strength.
- the inner ring 1 has a bearing ring main body 7, and the insertion holes 9 and 9 for inserting the balls 3 and the spacers 4 are inserted between the raceway grooves 1 a and 1 b and between the raceway grooves 2 a and 2 b.
- the ring body 7 is provided so as to penetrate in the bearing radial direction.
- the plugs 8 and 8 fitted into the insertion holes 9 and 9 are fixed by the connector 10, and the plugs 8 and 8 constitute part of the raceway grooves 1a and 1b.
- the raceway grooves 1a and 1b are formed in a state where the stopper 8 is once fixed to the insertion hole 9 of the raceway ring body 7 before the assembly of the bearing.
- each plug 8 is so-called non-quenched that is not subjected to heat treatment, so that at least the circumferential position where the insertion holes 9 and 9 are formed in the raceway ring body 7 is in an installation state where a load is not applied so much. It is desirable to do.
- the insertion holes 9 and 9 are arranged at positions close to the circumferential direction, so that the bearing ring body 7 can be in a desired installation state. Therefore, the bearing life can be further extended.
- the ball contact surfaces 4a and 4a on both sides of the spacer 4 are contact surface inner diameter portions 4aa made of a rotating body-shaped curved surface that is a trajectory obtained by making one turn of arcs having different center curvatures and curvature centers. It is good also as a compound curved surface shape which connected the contact surface outer diameter part 4ab.
- the contact surface inner diameter portion 4aa has a spherical portion having a diameter substantially equal to the ball radius R (see FIG. 3) as a ball contact portion.
- the spacer 4 connects the ball contact surfaces 4a and 4a on both sides with a contact surface inner diameter portion and a contact surface outer diameter portion formed by conical surfaces having different center angles instead of the above-described compound curved surface shape.
- a composite conical surface shape or a single conical surface shape may be used.
- the ball contact surfaces 4a, 4a on both sides may have a Gothic arch-like cross-sectional shape composed of two arcs having different curvature centers.
- a wind turbine turning unit support device will be described. 9 and 10 show an example of a wind turbine for wind power generation.
- This windmill 21 is provided with a nacelle 23 on a support base 22 so as to be able to turn horizontally, and a main shaft 25 is rotatably supported in a casing 24 of the nacelle 23.
- a blade 26 which is a wing is attached.
- the other end of the main shaft 25 is connected to the speed increaser 27, and the output shaft 28 of the speed increaser 27 is coupled to the rotor shaft of the generator 29.
- the nacelle 23 is rotatably supported by a slewing bearing BR1, and the slewing bearing of the first embodiment shown in FIGS. 1 to 4 is used for the slewing bearing BR1.
- a plurality of drive sources 30 are installed in the casing 24, and pinion gears are fixed to the drive sources 30 via reduction gears (not shown).
- the gear 6 of the outer ring 2 of the slewing bearing shown in FIG. 1 is arranged so as to mesh with the pinion gear.
- the outer ring 2 is connected and fixed to the support base 22 by a plurality of bolt holes 5, and the inner ring 1 is fixed to the casing 24.
- the plurality of drive sources 30 are driven in synchronization, and this turning driving force is transmitted to the outer ring 2. Therefore, the nacelle 23 can turn relative to the support base 22.
- the blade 26 is rotatably supported by the slewing bearing BR2.
- a slewing bearing BR2 for example, an integral inner ring is applied instead of the split inner ring 1 shown in FIG. 1, and instead of the gear 6 provided on the outer ring 2, an inner circumferential surface of the integral inner ring is applied.
- a gear is provided.
- a driving source for rotating the blade 26 is provided at the protruding end portion 25 a of the main shaft 25.
- An outer ring of the slewing bearing is connected and fixed to the distal end portion 25a, and a gear attached to the inner peripheral surface of the inner ring is engaged with the pinion gear of the drive source.
- the blade 26 can turn by driving the driving source and transmitting the turning driving force to the inner ring.
- the slewing bearing BR2 can support the wind turbine blade 26 with respect to the main shaft 25 so as to be rotatable about an axis L2 substantially perpendicular to the main shaft axis L1. In this way, the angle of the blade 26 and the direction of the nacelle 23 can be changed at any time according to the wind condition.
- the slewing bearing according to each of the above embodiments can be applied to construction machines such as hydraulic excavators and cranes other than those for wind power generation, rotary tables of machine tools, gun seats, parabolic antennas, and the like.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Rolling Contact Bearings (AREA)
- Wind Motors (AREA)
- Bearings For Parts Moving Linearly (AREA)
Abstract
Description
旋回軸受の保持器形式として、間座形式つまり転動体セパレータ形式(特許文献1)、または保持器形式がある。風車等に使用される旋回軸受はアキシアル荷重の他、ラジアル荷重、モーメント荷重を受ける。
メリット:
(1)ボールPCDに拘わらず樹脂間座を兼用可能
(2)質量 小
(3)価格 低
デメリット:
(1)ボイドによる強度不足
(2)保持器形式に対して、ボールの離合集散がし易い
肉ぬすみ等でボイド対策する方法が一般には考えられるが、強度面を考えると、得策とは言えない。
図3、図4に示すように、間座4の両側のボール接触面4a,4aは、図3において点線で表記したボール3のボール半径Rよりも若干大径の単一の球面形状としている。同図3に示すように、前記ボール接触面4aを含む球面を、実線「R1」にて表記する。なお、ボール接触面4aは後述するように球面形状に限定されるものではない。
ゲート位置による強度差、溶融粘度による強度差を確認するため、間座の圧壊試験を実施した。図6は間座の圧壊試験方法を説明するための断面図であり、図7はゲート位置および溶融粘度と、圧壊荷重との関係を表す図である。
試験対象の間座は、
本願の溶融粘度が高い材料(例えば、温度270℃における溶融粘度1110Pa・s)で且つゲート位置を凹み部に配置したもの、
比較例(1)の溶融粘度が低い材料(例えば、温度270℃における溶融粘度490Pa・s)で且つゲート位置を凹み部に配置したもの、
比較例(2)の溶融粘度が低い材料(例えば、温度270℃における溶融粘度490Pa・s)で且つゲート位置を間座の外径部に配置したもの、
である。
溶融粘度の違う二つの材料にてボイド発生率を比較検証した。その他の成形条件は全て統一した。
溶融粘度が低い材料(例えば、温度270℃における溶融粘度490Pa・s)の場合:間座400個中13個ボイドが発生した。
溶融粘度が高い材料(例えば、温度270℃における溶融粘度1110Pa・s)の場合:間座400個中ボイドが発生したものは0個であった。
詳しくは、接触面内径部4aaは、ボール接触部として、ボール半径R(図3参照)に略等しい径の球面部を有する形状としてある。間座4は、両側のボール接触面4a,4aを、上記のような複合曲面形状とする代わりに、互いに中心角度の異なる円すい面からなる接触面内径部と接触面外径部とを繋いだ複合円すい面形状、または単一の円すい面形状としても良い。また、両側のボール接触面4a,4aを、曲率中心の異なる2つの円弧で構成されるゴシックアーチ状の断面形状としても良い。
図9および図10は風力発電用の風車の一例を示す。この風車21は、支持台22上にナセル23を水平旋回自在に設け、このナセル23のケーシング24内に主軸25を回転自在に支持し、この主軸25のケーシング24外に突出した一端に、旋回翼であるブレード26を取付けてなる。主軸25の他端は増速機27に接続され、増速機27の出力軸28が発電機29のロータ軸に結合されている。
2…外輪
1a,1b,2a,2b…軌道溝
3…ボール
4…間座
4h…凹み部
7…軌道輪本体
8…栓
12…金型
21…風車
23…ナセル
25…主軸
26…ブレード
P1…ゲート位置
Claims (8)
- 内輪および外輪にそれぞれ軌道溝が形成され、これら内外輪の軌道溝間に複数のボールおよびこれらのボールの間に介在する間座が設けられた旋回軸受であって、
この旋回軸受は、ボールが内外輪の軌道溝の内面に4点接触する形状に前記各軌道溝の断面形状が形成された4点接触玉軸受であり、
前記間座は樹脂材料からなり、この樹脂材料を、温度270℃における溶融粘度1000Pa・s以上2000Pa・s以下とした旋回軸受。 - 請求項1において、前記間座は両側のボール接触面が、中心部に至るに従って深く凹む凹面形状とされ、この間座を射出成形する金型のゲート位置を前記凹面形状の底部に配置した旋回軸受。
- 請求項1において、前記間座の樹脂材料をPA6とした旋回軸受。
- 請求項1において、前記ボールの直径を30mm以上80mm以下とした旋回軸受。
- 請求項1において、風車のブレードを主軸に対して、主軸軸心に略垂直な軸心回りに旋回自在に支持する旋回軸受。
- 請求項1において、風車のナセルを支持台に対して旋回自在に支持する旋回軸受。
- 請求項1に記載の旋回軸受により、風車のブレードを主軸に対して、主軸軸心に略垂直な軸心回りに旋回自在に支持した風車の旋回部支持装置。
- 請求項1に記載の旋回軸受により、風車のナセルを支持台に対して旋回自在に支持した風車の旋回部支持装置。
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP18167172.8A EP3366936B1 (en) | 2009-07-27 | 2010-07-20 | Slewing bearing and rotating section support device for wind turbine |
| IN618DEN2012 IN2012DN00618A (ja) | 2009-07-27 | 2010-07-20 | |
| KR1020127002675A KR101659881B1 (ko) | 2009-07-27 | 2010-07-20 | 선회 베어링 및 풍차의 선회부 지지 장치 |
| EP10804282.1A EP2461057B1 (en) | 2009-07-27 | 2010-07-20 | Rotating shaft bearing and rotating section support device for wind turbine |
| US13/384,698 US8944692B2 (en) | 2009-07-27 | 2010-07-20 | Slewing bearing and rotating section support device for wind turbine |
| CN201080033307.1A CN102472322B (zh) | 2009-07-27 | 2010-07-20 | 旋转轴承和风车的旋转部支承装置 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-174261 | 2009-07-27 | ||
| JP2009174261A JP5763292B2 (ja) | 2009-07-27 | 2009-07-27 | 旋回軸受 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011013536A1 true WO2011013536A1 (ja) | 2011-02-03 |
Family
ID=43529195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2010/062165 Ceased WO2011013536A1 (ja) | 2009-07-27 | 2010-07-20 | 旋回軸受および風車の旋回部支持装置 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US8944692B2 (ja) |
| EP (2) | EP3366936B1 (ja) |
| JP (1) | JP5763292B2 (ja) |
| KR (1) | KR101659881B1 (ja) |
| CN (1) | CN102472322B (ja) |
| IN (1) | IN2012DN00618A (ja) |
| WO (1) | WO2011013536A1 (ja) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012155946A1 (en) * | 2011-05-13 | 2012-11-22 | Aktiebolaget Skf | Spacer for rolling bearing, notably used in a wind turbine |
| WO2012155945A1 (en) * | 2011-05-13 | 2012-11-22 | Aktiebolaget Skf | Spacer for rolling bearing, notably used in a wind turbine |
| WO2013029684A1 (en) * | 2011-09-02 | 2013-03-07 | Aktiebolaget Skf | Spacer for rolling bearing, notably used in a wind turbine |
| WO2013108344A1 (ja) * | 2012-01-18 | 2013-07-25 | 宇部興産株式会社 | 樹脂組成物及びポリアミド樹脂とガラス繊維とを含む組成物 |
| US20140199171A1 (en) * | 2011-06-01 | 2014-07-17 | Wobben Properties Gmbh | Large rolling bearing |
| CN105041848A (zh) * | 2014-04-23 | 2015-11-11 | 通用电气公司 | 用于轴承的间隔件组件 |
| DE102016113786A1 (de) | 2016-07-27 | 2018-02-01 | Thyssenkrupp Ag | Verfahren zur Anstellwinkelverstellung eines Rotorblattes einer Windkraftanlage und Windkraftanlage |
| CN114483772A (zh) * | 2022-01-25 | 2022-05-13 | 中国铁建重工集团股份有限公司 | 一种具有高承载能力的回转支承 |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130199314A1 (en) * | 2012-01-26 | 2013-08-08 | Roller Bearing Company Of America, Inc. | Flywheel assembly for gyroscopic applications having ball bearing slug separators |
| JP2013185659A (ja) * | 2012-03-08 | 2013-09-19 | Ntn Corp | 球面間座、軸受、直動装置および球面間座の製造方法 |
| CN103511451A (zh) * | 2013-09-07 | 2014-01-15 | 安徽枞晨回转支承有限公司 | 一种一圆一方双滚道偏航轴承 |
| GB2524054A (en) * | 2014-03-13 | 2015-09-16 | Marine Current Turbines Ltd | Connector |
| US9303689B2 (en) | 2014-04-29 | 2016-04-05 | Roller Bearing Company Of America, Inc. | Non-rhythmically spaced rolling elements for reduction in bearing non-repeatable run-out |
| EP3001059B1 (en) * | 2014-09-29 | 2020-05-06 | Aktiebolaget SKF | Plug assembly, rolling bearing comprising such plug assembly and machine comprising such rolling bearing |
| CN105545962A (zh) * | 2016-01-26 | 2016-05-04 | 河北书浩轴承有限公司 | 一种高速密封轧机用定位轴承 |
| US10465751B2 (en) * | 2016-05-09 | 2019-11-05 | Alan Robert Gillengerten | Rotating conduit joints |
| EP3312414B1 (en) | 2016-10-24 | 2021-03-03 | Nordex Energy Spain, S.A. | Wind turbine and pitch bearing of the wind turbine |
| DE102017222788A1 (de) * | 2017-12-14 | 2019-06-19 | Aktiebolaget Skf | Lageranordnung |
| CN109519481A (zh) * | 2018-12-29 | 2019-03-26 | 苏州市希格曼智能制造有限公司 | 一种ct机回转支承装置 |
| CN109737006B (zh) * | 2018-12-29 | 2024-10-11 | 北京金风科创风电设备有限公司 | 一种轴承、风力发电机组的变桨装置及其变桨方法 |
| KR102681686B1 (ko) * | 2022-11-03 | 2024-07-04 | 우림피티에스(주) | 대형 풍력발전기용 피치 베어링과 요 베어링 어셈블리 시스템 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01174626A (ja) | 1987-12-29 | 1989-07-11 | Takashima Kinshi Kk | 金銀糸の製造方法 |
| JP2004324854A (ja) * | 2003-04-28 | 2004-11-18 | Nsk Ltd | 転がり軸受 |
| JP2008082380A (ja) * | 2006-09-26 | 2008-04-10 | Ntn Corp | 転がり軸受、保持器付ころ、および風力発電機の主軸支持構造 |
Family Cites Families (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3361501A (en) | 1966-11-21 | 1968-01-02 | Messinger Bearings Inc | Rolling bearings |
| DE2752487C2 (de) * | 1977-11-24 | 1979-10-04 | Maschinenfabrik Buckau R. Wolf Ag, 4048 Grevenbroich | Kugelgelagerte Drehverbindung für Bagger, Drehkräne o.dgl |
| JP2535587B2 (ja) * | 1988-03-29 | 1996-09-18 | 日本トムソン株式会社 | 薄肉形クロスロ―ラ軸受 |
| JP2511112B2 (ja) * | 1988-07-12 | 1996-06-26 | 日本トムソン株式会社 | 蓋付き旋回輪軸受の潤滑装置 |
| JP2583608B2 (ja) * | 1989-07-05 | 1997-02-19 | 日本トムソン株式会社 | 転動体挿入蓋付き旋回輪軸受とその加工方法 |
| JPH08303466A (ja) * | 1995-04-28 | 1996-11-19 | Ntn Corp | 転がり軸受 |
| JP3695195B2 (ja) * | 1998-06-02 | 2005-09-14 | 日本精工株式会社 | ボールねじ機構、および直動装置 |
| JP2000170754A (ja) * | 1998-12-02 | 2000-06-20 | Harmonic Drive Syst Ind Co Ltd | クロスローラベアリング |
| US6565947B2 (en) * | 2000-01-11 | 2003-05-20 | Nsk Ltd. | Retaining piece structure |
| JP2002339981A (ja) * | 2001-05-22 | 2002-11-27 | Ntn Corp | 単列玉旋回軸受 |
| JP2003097564A (ja) * | 2001-09-25 | 2003-04-03 | Harmonic Drive Syst Ind Co Ltd | 4点接触ボールベアリング |
| EP1353092B1 (en) * | 2002-04-11 | 2009-06-17 | NSK Ltd., | Linear motion device |
| JP2005207264A (ja) * | 2004-01-21 | 2005-08-04 | Ntn Corp | 小型風力発電機主軸用軸受 |
| JP4800599B2 (ja) * | 2004-07-05 | 2011-10-26 | Ntn株式会社 | 円すいころ軸受 |
| JP4422646B2 (ja) * | 2005-03-31 | 2010-02-24 | 日本トムソン株式会社 | 転動体間にセパレータを配設した転がり案内装置 |
| DK200500899A (da) | 2005-06-17 | 2006-12-18 | Lm Glasfiber As | Vinge med hængslet vingetip |
| JP2007092983A (ja) * | 2005-09-01 | 2007-04-12 | Ntn Corp | ころ軸受 |
| JP4884886B2 (ja) * | 2005-09-01 | 2012-02-29 | Ntn株式会社 | ころ軸受 |
| US8523451B2 (en) | 2005-09-01 | 2013-09-03 | Ntn Corporation | Roller bearing |
| WO2007058351A1 (ja) * | 2005-11-18 | 2007-05-24 | Nsk Ltd. | 樹脂製保持器及び転がり軸受 |
| EP1977126B1 (en) * | 2006-01-23 | 2009-10-28 | Vestas Wind Systems A/S | A bearing, a wind turbine and methods of manufacturing a bearing |
| JP2007278178A (ja) * | 2006-04-06 | 2007-10-25 | Nabtesco Corp | 風車 |
| CN101568735B (zh) * | 2006-12-18 | 2012-02-01 | 维斯塔斯风力系统有限公司 | 轴承及通过风轮机的轴承传递力的方法 |
| JP4957964B2 (ja) * | 2007-06-18 | 2012-06-20 | 株式会社ジェイテクト | 電動パワーステアリング装置 |
| JP2009156295A (ja) * | 2007-12-25 | 2009-07-16 | Ntn Corp | 風力発電装置用転がり軸受 |
| JP2010281352A (ja) * | 2008-06-06 | 2010-12-16 | Ntn Corp | 旋回軸受およびその軌道溝加工方法 |
| CN201487047U (zh) * | 2009-09-01 | 2010-05-26 | 中机洛阳轴承科技有限公司 | 一种兆瓦风电机组叶轮系统专用轴承 |
| JP5893421B2 (ja) * | 2012-02-06 | 2016-03-23 | 日本トムソン株式会社 | 旋回軸受 |
-
2009
- 2009-07-27 JP JP2009174261A patent/JP5763292B2/ja not_active Expired - Fee Related
-
2010
- 2010-07-20 EP EP18167172.8A patent/EP3366936B1/en active Active
- 2010-07-20 KR KR1020127002675A patent/KR101659881B1/ko not_active Expired - Fee Related
- 2010-07-20 CN CN201080033307.1A patent/CN102472322B/zh not_active Expired - Fee Related
- 2010-07-20 WO PCT/JP2010/062165 patent/WO2011013536A1/ja not_active Ceased
- 2010-07-20 EP EP10804282.1A patent/EP2461057B1/en not_active Not-in-force
- 2010-07-20 IN IN618DEN2012 patent/IN2012DN00618A/en unknown
- 2010-07-20 US US13/384,698 patent/US8944692B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01174626A (ja) | 1987-12-29 | 1989-07-11 | Takashima Kinshi Kk | 金銀糸の製造方法 |
| JP2004324854A (ja) * | 2003-04-28 | 2004-11-18 | Nsk Ltd | 転がり軸受 |
| JP2008082380A (ja) * | 2006-09-26 | 2008-04-10 | Ntn Corp | 転がり軸受、保持器付ころ、および風力発電機の主軸支持構造 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP2461057A4 |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9482279B2 (en) | 2011-05-13 | 2016-11-01 | Aktiebolaget Skf | Spacer for rolling bearing, notably used in a wind turbine |
| WO2012155945A1 (en) * | 2011-05-13 | 2012-11-22 | Aktiebolaget Skf | Spacer for rolling bearing, notably used in a wind turbine |
| US9995340B2 (en) | 2011-05-13 | 2018-06-12 | Aktiebolaget Skf | Spacer for rolling bearing, notably used in a wind turbine |
| WO2012155946A1 (en) * | 2011-05-13 | 2012-11-22 | Aktiebolaget Skf | Spacer for rolling bearing, notably used in a wind turbine |
| CN103534496A (zh) * | 2011-05-13 | 2014-01-22 | Skf公司 | 特别用于风力涡轮机中的滚动轴承的垫片 |
| CN103534496B (zh) * | 2011-05-13 | 2016-11-16 | Skf公司 | 用于风力涡轮机中的滚动轴承的垫片 |
| US9541126B2 (en) * | 2011-06-01 | 2017-01-10 | Wobben Properties Gmbh | Large rolling bearing |
| US20140199171A1 (en) * | 2011-06-01 | 2014-07-17 | Wobben Properties Gmbh | Large rolling bearing |
| US9341249B2 (en) | 2011-09-02 | 2016-05-17 | Aktiebolaget Skf | Spacer for rolling bearing, notably used in a wind turbine |
| CN103890422B (zh) * | 2011-09-02 | 2016-07-27 | Skf公司 | 特别是用在风轮机中的用于滚动轴承的间隔器 |
| CN103890422A (zh) * | 2011-09-02 | 2014-06-25 | Skf公司 | 特别是用在风轮机中的用于滚动轴承的间隔器 |
| WO2013029684A1 (en) * | 2011-09-02 | 2013-03-07 | Aktiebolaget Skf | Spacer for rolling bearing, notably used in a wind turbine |
| WO2013108344A1 (ja) * | 2012-01-18 | 2013-07-25 | 宇部興産株式会社 | 樹脂組成物及びポリアミド樹脂とガラス繊維とを含む組成物 |
| CN105041848A (zh) * | 2014-04-23 | 2015-11-11 | 通用电气公司 | 用于轴承的间隔件组件 |
| DE102016113786A1 (de) | 2016-07-27 | 2018-02-01 | Thyssenkrupp Ag | Verfahren zur Anstellwinkelverstellung eines Rotorblattes einer Windkraftanlage und Windkraftanlage |
| CN114483772A (zh) * | 2022-01-25 | 2022-05-13 | 中国铁建重工集团股份有限公司 | 一种具有高承载能力的回转支承 |
| CN114483772B (zh) * | 2022-01-25 | 2023-10-31 | 中国铁建重工集团股份有限公司 | 一种具有高承载能力的回转支承 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101659881B1 (ko) | 2016-09-26 |
| EP2461057A1 (en) | 2012-06-06 |
| IN2012DN00618A (ja) | 2015-06-12 |
| EP3366936B1 (en) | 2019-12-11 |
| EP3366936A1 (en) | 2018-08-29 |
| CN102472322B (zh) | 2015-09-30 |
| EP2461057B1 (en) | 2018-12-26 |
| US8944692B2 (en) | 2015-02-03 |
| US20120195538A1 (en) | 2012-08-02 |
| JP5763292B2 (ja) | 2015-08-12 |
| EP2461057A4 (en) | 2017-03-29 |
| JP2011027188A (ja) | 2011-02-10 |
| KR20120038463A (ko) | 2012-04-23 |
| CN102472322A (zh) | 2012-05-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5763292B2 (ja) | 旋回軸受 | |
| AU2010201623B2 (en) | Gear box for wind turbine generator and wind turbine generator | |
| ES2933289T3 (es) | Turbina eólica con un rodamiento de anillo giratorio y procedimiento para ensamblar un rodamiento de anillo giratorio con una precarga predeterminada | |
| ES2965725T3 (es) | Cojinete de deslizamiento esférico para un tren de potencia de turbina eólica | |
| US11725633B2 (en) | Pitch bearing for a wind turbine | |
| CN201368188Y (zh) | 行星轮的支承结构 | |
| EP2937585B1 (en) | Spacer assembly for a bearing | |
| US11174895B2 (en) | Bearing for a wind turbine drivetrain having an elastomer support | |
| US10655610B2 (en) | Wire races for wind turbine bearings | |
| WO2011013551A1 (ja) | 旋回軸受のシール構造および旋回部支持装置 | |
| CN102588429A (zh) | 风力涡轮机叶片轴承 | |
| EP3470671B1 (en) | Wind turbine pitch bearing with line contact rolling elements | |
| US20170002795A1 (en) | Pitch assembly for a wind turbine rotor blade | |
| CN112105816A (zh) | 用于风力涡轮的变桨轴承 | |
| EP3614003B1 (en) | Ball plug retention for a slewing ring bearing | |
| US9938959B2 (en) | Hub and bearing system and a turbine comprising the hub and bearing system | |
| CN210484409U (zh) | 一种风电增速箱圆柱滚子轴承 | |
| CN119239932A (zh) | 一种旋翼桨毂轴向铰结构 | |
| DK202070239A1 (en) | Improvements relating to preloading wind turbine main shaft bearings |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WWE | Wipo information: entry into national phase |
Ref document number: 201080033307.1 Country of ref document: CN |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10804282 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 13384698 Country of ref document: US |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 618/DELNP/2012 Country of ref document: IN |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| ENP | Entry into the national phase |
Ref document number: 20127002675 Country of ref document: KR Kind code of ref document: A |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2010804282 Country of ref document: EP |