CN112922957A - Elastic tilting bearing bush sliding bearing of wind turbine - Google Patents
Elastic tilting bearing bush sliding bearing of wind turbine Download PDFInfo
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- CN112922957A CN112922957A CN202110246140.7A CN202110246140A CN112922957A CN 112922957 A CN112922957 A CN 112922957A CN 202110246140 A CN202110246140 A CN 202110246140A CN 112922957 A CN112922957 A CN 112922957A
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- bearing
- bearing bush
- supporting seat
- bush
- main shaft
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- RLQJEEJISHYWON-UHFFFAOYSA-N flonicamid Chemical compound FC(F)(F)C1=CC=NC=C1C(=O)NCC#N RLQJEEJISHYWON-UHFFFAOYSA-N 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
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Images
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
- F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
- F16C27/02—Sliding-contact bearings
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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
- F16C2360/31—Wind motors
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- 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
Abstract
The invention provides an elastically tiltable bush sliding bearing for a wind turbine, comprising: the bearing block is fixedly connected with the main frame, and the bearing block is sleeved outside the first end of the main shaft of the wind turbine and is concentric with the main shaft; the tilting pad elastic structures are connected and arranged between the bearing seat and the main shaft along the circumferential direction of the main shaft; the tilting pad elastic structure comprises: the bearing comprises a bearing bush, an elastic device and a tilting bearing bush supporting seat; the bearing bush is arranged between the bearing block and the main shaft, the first side of the bearing bush is connected with the main shaft in a sliding mode, and the outer surface of the first side of the bearing bush is matched with the outer surface of the first end of the main shaft; the tilting bearing bush supporting seat is connected and arranged between the bearing block and the bearing bush; the elastic device is pre-compressed and arranged between the tilting bearing bush supporting seat and the bearing bush, and applies elastic pressing force in the radial direction of the main shaft to the bearing bush; through the cooperation of the tilting bearing bush supporting seat and the elastic device, the bearing bush can be tilted and move along with the main shaft.
Description
Technical Field
The invention relates to the technical field of wind turbines, in particular to an elastic tilting bearing bush sliding bearing of a wind turbine.
Background
In a wind turbine of the prior art, as shown in fig. 1, blades and a hub are assembled together to form an impeller 11, the impeller 11, a main shaft 12, a gear box 14 and a generator 17 form a transmission chain of the wind turbine, the impeller 11 rotates to drive the main shaft 12, the main shaft 12 drives an output shaft of the gear box 14 to rotate, and an output shaft of the gear box 14 drives a rotor of the generator 17 to rotate. The impeller 11, the main shaft 12 and the gear box 14 are fixedly arranged on a main frame 13 of the wind generating set, and the generator 17 is fixedly arranged on a rear frame 16. The main frame 13 is fixedly connected to the ground by a vertically arranged tower (not shown). Wind turbines convert the energy of moving air into electrical energy. The moving air accelerates the impeller, the rotation of the impeller is transmitted to the generator, and the rotation energy of the impeller is converted into electric energy through the generator.
The main shaft of the wind turbine is a critical part of the drive train of the wind turbine, which has a shape similar to a "trumpet", as shown in fig. 2. The end face of the first end of the main shaft is provided with a flange 10, the first end of the main shaft is provided with a shaft shoulder, and the flange and the shaft shoulder are in arc transition. The main shaft is fixedly connected with the main frame through a main bearing. The second end of the main shaft is used for installing a gearbox tensioning sleeve 15. The main shaft is fixedly connected with the main bearing and the gearbox tensioning sleeve in an interference fit mode.
Currently, the main bearing of a wind turbine generally adopts a rolling bearing, such as a single double-row tapered roller bearing or two single-row tapered roller bearings. Individual companies are also beginning to investigate the use of plain bearings on direct drive turbines. The following patent documents related to the sliding main bearing of a wind turbine are found through search:
patent numbers: 200980160389.3, title of the invention: a wind turbine main bearing. The sliding main bearing structure is distributed with a sliding main bearing transmission chain according to a load transfer decomposition mode and is applied to a double-fed wind turbine.
Patent numbers: CN103765005A, invention name: a direct drive wind turbine. Such a sliding main bearing arrangement is referred to in the form of a three row cylindrical roller bearing.
Patent No. CN103782028A, title of invention: directly driving the wind turbine. The sliding main bearing structure refers to a single double-row tapered roller bearing or two single-row tapered roller transmission chain forms.
Patent numbers: US9995283B2, title of the invention: a method FOR manufacturing a WIND TURBINE includes cutting a BEARING array FOR WIND TURBINE. The sliding main bearing structure is distributed with a sliding main bearing transmission chain according to a load transfer decomposition mode and is applied to a wind turbine in a direct driving mode. However, the existing wind turbine rolling main bearing generally has the problems of low bearing capacity, poor shock resistance, unstable and reliable work, difficulty in manufacturing, long production period, high production cost, incapability of maintaining and short service life of the bearing.
Some main bearings of wind turbines also use sliding bearings, but the bearing shells of the sliding bearings cannot be made tiltable. The problems that a sliding bearing cannot be aligned, the contact surface of a bearing bush and a main shaft of a wind turbine is small, the bearing capacity is low, the shock resistance is not good enough and the like exist. When the wind load direction changes and the main shaft of the wind turbine is impacted by the instant load, the existing sliding bearing also has the problem of large shafting amplitude.
It is therefore highly desirable to design a new main bearing for a wind turbine to solve this problem.
Disclosure of Invention
The invention aims to provide an elastic tilting bearing bush sliding bearing of a wind turbine, which is fixedly connected with a main frame of the wind turbine and can be sleeved outside a first end of a main shaft of the wind turbine or a shaft shoulder of the main shaft. The first bearing bush supporting seat and the second bearing bush supporting seat are connected in a sliding mode through the spherical arc surfaces, elastic pressing force is provided for the bearing bushes through the elastic devices, and the bearing bushes can be inclined and can be kept attached to the main shaft/shaft shoulder. When the wind load direction of the wind turbine changes suddenly, the sliding bearing can continuously provide thrust load for the main shaft/shaft shoulder of the wind turbine, improves the shock resistance of the bearing, enables the wind turbine to work more stably and reliably, and prolongs the service life of the bearing bush.
In order to achieve the above object, the present invention provides an elastically tiltable bush sliding bearing of a wind turbine, a first end of a main shaft of the wind turbine facing a hub of the wind turbine, the sliding bearing comprising:
the bearing block is fixedly connected with the main frame; the bearing seat is sleeved outside the first end of the main shaft of the wind turbine and is concentric with the main shaft;
the tilting pad elastic structures are connected and arranged between the bearing seat and the main shaft along the circumferential direction of the main shaft;
the tilting pad elastic structure comprises: the bearing comprises a bearing bush, an elastic device and a tilting bearing bush supporting seat;
the bearing bush is arranged between the bearing block and the main shaft, the first side of the bearing bush is connected with the outer side wall of the first end of the main shaft in a sliding mode, and the outer surface of the first side of the bearing bush is matched with the outer surface of the first end of the main shaft;
the tilting bearing bush supporting seat is connected and arranged between the bearing block and the bearing bush; the elastic device is pre-compressed between the tilting bearing bush supporting seat and the bearing bush and applies elastic pressing force in the radial direction of the main shaft to the bearing bush; through the cooperation of the tilting bearing bush supporting seat and the elastic device, the bearing bush can be tilted and attached to the main shaft.
Preferably, the tilting pad supporting seat comprises: the first bearing bush supporting seat and the second bearing bush supporting seat are connected in a sliding mode;
the first bearing bush supporting seat is arranged between the second bearing bush supporting seat and the bearing bush;
the second bearing bush supporting seat is arranged between the bearing seat and the first bearing bush supporting seat and is fixedly connected with the bearing seat; the second bearing bush supporting seat is connected with the first bearing bush supporting seat in a sliding mode through a spherical arc surface; a gap is arranged between the second bearing bush supporting seat and the bearing bush;
the elastic device is arranged between the first bearing bush supporting seat and the bearing bush.
Preferably, a first blind hole matched with the elastic device is formed in the first side of the first bearing bush supporting seat, and the elastic device is embedded in the first blind hole; the first side of the first bearing bush supporting seat faces the bearing bush.
Preferably, a second blind hole matched with the first side of the first bearing bush supporting seat is formed in the second side, opposite to the first side of the bearing bush, and the first side of the first bearing bush supporting seat is embedded into the second blind hole.
Preferably, a plurality of first mounting grooves matched with the second sides of the second bearing bush supporting seats are formed in the inner side of the bearing seat along the circumferential direction of the main shaft, the second sides of the second bearing bush supporting seats are fixedly embedded in the first mounting grooves, and one first mounting groove corresponds to one second bearing bush supporting seat; the second side of the second bearing bush supporting seat faces the bearing seat.
The invention also provides an elastically tiltable bush sliding bearing for a wind turbine, the outer wall of a first end of a main shaft of the wind turbine being provided with an annular shoulder concentric with the main shaft, both sides of the shoulder facing a hub/gearbox of the wind turbine, respectively, the sliding bearing comprising:
the bearing block is fixedly connected with the main frame; the bearing seat is sleeved outside the shaft shoulder and is concentric with the main shaft; the bearing blocks are respectively faced to the hub/gearbox of the wind turbine on both sides;
the tilting pad elastic structures are connected and arranged between the bearing seat and the shaft shoulder along the circumferential direction of the main shaft; the plurality of tilting pad elastic structures are distributed on two sides of the shaft shoulder;
the tilting pad elastic structure comprises: the bearing comprises a bearing bush, an elastic device and a tilting bearing bush supporting seat;
the bearing bush is arranged between the bearing block and the shaft shoulder, the first side of the bearing bush is connected with the shaft shoulder in a sliding mode, and the outer surface of the first side of the bearing bush is matched with the outer surface of the shaft shoulder;
the tilting bearing bush supporting seat is connected and arranged between the bearing block and the bearing bush; the elastic device is pre-compressed between the tilting bearing bush supporting seat and the bearing bush and applies elastic pressing force in the axial direction of the main shaft to the bearing bush; through the cooperation of the tilting bearing bush supporting seat and the elastic device, the bearing bush can be tilted and attached to the shaft shoulder.
Preferably, the tilting pad supporting seat comprises: the first bearing bush supporting seat and the second bearing bush supporting seat are connected in a sliding mode;
the first bearing bush supporting seat is arranged between the second bearing bush supporting seat and the bearing bush;
the second bearing bush supporting seat is arranged between the bearing seat and the first bearing bush supporting seat and is fixedly connected with the bearing seat; the second bearing bush supporting seat is connected with the first bearing bush supporting seat in a sliding mode through a spherical arc surface; a gap is arranged between the second bearing bush supporting seat and the bearing bush;
the elastic device is arranged between the first bearing bush supporting seat and the bearing bush.
Preferably, a first blind hole matched with the elastic device is formed in the first side of the first bearing bush supporting seat, and the elastic device is embedded in the first blind hole; the first side of the first bearing bush supporting seat faces the bearing bush.
Preferably, a second blind hole matched with the first side of the first bearing bush supporting seat is formed in the second side, opposite to the first side of the bearing bush, and the first side of the first bearing bush supporting seat is embedded into the second blind hole.
Preferably, a plurality of first mounting grooves matched with the second sides of the second bearing bush supporting seats are formed in the inner walls of the two sides of the bearing seat along the circumferential direction of the main shaft, the second sides of the second bearing bush supporting seats are fixedly embedded in the first mounting grooves, and one first mounting groove corresponds to one second bearing bush supporting seat; the second side of the second bearing bush supporting seat faces the bearing seat.
Compared with the prior art, the invention has the beneficial effects that:
1) the tilting bearing bush of the wind turbine can realize tilting of the bearing bush by slidably connecting the first bearing bush supporting seat and the second bearing bush supporting seat through the spherical arc surface when the wind load direction is changed, and can provide elastic pressing force for the bearing bush through the elastic device, so that the bearing bush can continuously provide thrust in the radial direction of a main shaft/the axial direction of the main shaft for the main shaft/a shaft shoulder of the wind turbine; therefore, the sliding bearing has the remarkable effects of small shafting amplitude and strong bearing shock resistance;
2) according to the invention, the outer profile of the first side of the bearing bush is matched with the outer profile of the first end of the main shaft/the outer profile of the shaft shoulder, so that the contact area between the bearing bush and the main shaft/the shaft shoulder is increased, and the bearing capacity of the sliding bearing is improved;
3) the sliding bearing of the invention ensures that the wind turbine works more stably and reliably, prolongs the service life of the bearing bush and ensures the stable work of the wind turbine.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are an embodiment of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts according to the drawings:
FIG. 1 is a schematic view of a drive train of a prior art wind turbine;
FIG. 2 is a schematic view of a main shaft of a wind turbine according to the prior art;
FIG. 3 is a cross-sectional view of an elastically tiltable bush-type sliding bearing and a main shaft of the present invention taken along an axial direction of the main shaft according to a first embodiment;
FIG. 4 is a cross-sectional view of an elastically tiltable bush-type sliding bearing and a main shaft of the present invention in a radial direction of the main shaft according to a first embodiment;
FIG. 5 is an enlarged partial schematic view of FIG. 3;
FIG. 6 is a sectional view of the tilting pad elastic structure according to the first embodiment of the present invention;
FIG. 7 is a schematic view of the connection of the elastically tiltable bush-type sliding bearing of the present invention to the shoulder in the second embodiment;
FIG. 8 is a sectional view of the tilting pad elastic structure according to the second embodiment of the present invention;
in the figure: 10. a flange; 11. an impeller; 12. a main shaft; 13. a main frame; 14. a gear case; 15. a gearbox tensioning sleeve; 16. a rear frame; 17. a generator; 18. a shaft shoulder;
20. the tilting pad elastic structure; 21. bearing bushes; 22. a first bearing bush supporting seat; 23. a second bearing bush supporting seat; 24. an elastic device; 25. a spherical arc surface; 26. the contact surface of the first side of the bearing bush and the main shaft; 28. and a bearing seat.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
A first end of the wind turbine main shaft 12 is directed towards the hub of the wind turbine.
The invention provides an elastic tilting bearing bush sliding bearing of a wind turbine, which is sleeved outside a first end of a main shaft of the wind turbine and is concentric with a central shaft 12. As shown in fig. 3 and 4, the elastically tiltable bush sliding bearing of the present invention includes: a bearing block 28 and a plurality of tilt pad spring structures 20.
The bearing block 28 is fixedly connected with the main frame, sleeved outside the first end of the main shaft and concentric with the main shaft 12;
as shown in fig. 3 and 4, the tilting pad elastic structures 20 are disposed between the bearing seat 28 and the main shaft 12 along the circumferential direction of the main shaft 12.
The tilting pad elastic structure 20 comprises: the bearing bush 21, the elastic device 24 and the tilting bearing bush supporting seat;
as shown in fig. 3 to 5, the bearing bush 21 is disposed between the bearing seat 28 and the main shaft 12, a first side of the bearing bush is slidably connected to an outer side wall of a first end of the main shaft, and an outer surface of the first side of the bearing bush matches an outer surface of the first end of the main shaft; the bearing shell first side spindle interface 26 is shown in FIG. 6 as an arcuate surface.
As shown in fig. 3 to 6, the tilting pad support base is disposed between the bearing seat 28 and the pad 21, and includes: a first bearing shoe support seat 22 and a second bearing shoe support seat 23.
The first bearing bush support seat 22 is arranged between the second bearing bush support seat 23 and the bearing bush 21. Wherein the first side of the first shoe support base faces the shoe 21 and the second side of the first shoe support base faces the second shoe support base 23.
As shown in fig. 5, a second blind hole matched with the first side of the first bearing bush support seat is formed in a second side of the bearing bush opposite to the first side of the bearing bush, and the first side of the first bearing bush support seat is embedded in the second blind hole. The first side of the first bearing bush supporting seat is further provided with a first blind hole matched with the elastic device 24, and the elastic device 24 is embedded into the first blind hole in a pre-compression mode and is located between the first bearing bush supporting seat 22 and the bearing bush 21. The elastic device 24 applies an elastic pressing force to the bearing bush 21 in the radial direction of the main shaft. In an embodiment of the invention, the resilient means 24 is a spring or a disc spring.
The second bearing bush supporting seat 23 is arranged between the bearing seat 28 and the first bearing bush supporting seat 22, a gap is arranged between the second bearing bush supporting seat 23 and the bearing bush 21, and the pre-compression amount of the elastic device 24 is larger than the gap. With the second bearing shoe support first side facing the first bearing shoe support 22 and the second bearing shoe support second side facing the bearing seat 28.
As shown in fig. 3 and 5, a plurality of first mounting grooves matched with the second sides of the second bearing bush support seats are further formed in the inner side of the bearing seat 28 along the circumferential direction of the main shaft 12, the second sides of the second bearing bush support seats are fixedly embedded in the first mounting grooves, and one first mounting groove corresponds to one second bearing bush support seat 23. In the embodiment of the present invention, the bearing seat 28 and the second bearing bush supporting seat 23 are fixedly connected by sequentially passing the bearing seat 28 and the second bearing bush supporting seat 23 through bolts from the outside.
The first side of the second bearing bush supporting seat is connected with the second side of the first bearing bush supporting seat in a sliding mode through a spherical arc surface 25, and the bearing bush 21 can incline and attach to the spindle 12. As shown in fig. 3, 5 and 6, the second side of the first bearing bush supporting seat has a spherical arc convex surface, the first side of the second bearing bush supporting seat has a spherical arc concave surface matched with the spherical arc convex surface, and the sliding connection between the first side of the second bearing bush supporting seat and the second side of the first bearing bush supporting seat is realized through the spherical arc convex surface and the spherical arc concave surface. The contact surfaces of the first bearing bush supporting seat 22 and the second bearing bush supporting seat 23 can be directly processed into high-finish surfaces, and wear-resistant materials (such as polyetheretherketone non-metallic materials or copper alloys) can be applied to the spherical arc convex surface and the spherical arc concave surface in a brazing, plating and melting mode, so that the contact surfaces of the first bearing bush supporting seat 22 and the second bearing bush supporting seat 23 are wear-resistant, and friction between the first bearing bush supporting seat 22 and the second bearing bush supporting seat 23 is reduced.
When the wind load direction of the wind turbine changes, the magnitude and direction of the load transmitted by the impeller 11 to the main shaft 12 may change. When the wind load direction changes, through the spherical arc surface 25 between first axle bush supporting seat 22 and the second axle bush supporting seat 23, realize axle bush 21 can real-time adjustment direction and keep laminating main shaft outer wall, increase axle bush 21 and main shaft 12's contact surface, improve axle bush 21 bearing capacity and life. When the wind load direction and magnitude change, part of the bearing bush 21 is not loaded or the load becomes smaller, so that the disc spring corresponding to the bearing bush 21 generates an elastic deformation restoring force. Under the elastic deformation restoring force, the shoe 21 is pushed toward the main shaft 12, the shoe 21 is kept attached to the main shaft 12, and a pushing force in the radial direction of the main shaft is constantly given to the main shaft 12. Therefore, even when the load of the wind turbine is changed suddenly, the sliding bearing has excellent shock resistance, and the wind turbine can work more stably and reliably.
Example two
The outer wall of the first end of the main shaft of the wind turbine is provided with an annular shoulder 18 concentric with said main shaft 12, both sides of the shoulder facing towards the hub/gearbox of the wind turbine, respectively.
The present invention also provides an elastic tilting pad sliding bearing of a wind turbine, which is sleeved outside the shaft shoulder, as shown in fig. 7 and 8, and comprises: a bearing block 28 and a plurality of tilt pad spring structures 20.
As shown in fig. 7 (only the bearing seat 28 and the shoulder 18 on the upper half of the central shaft of the main shaft are shown in fig. 7), the bearing seat 28 is fixedly connected with the main frame, which is sleeved outside the shoulder 18 and is concentric with the main shaft 12; the bearing blocks are each faced to the hub/gearbox of the wind turbine on both sides.
As shown in fig. 7, the plurality of tilting pad elastic structures 20 are connected and arranged between the bearing seat 28 and the shaft shoulder 18 along the circumferential direction of the main shaft 12. And a plurality of tilting pad elastic structures 20 are respectively distributed on two sides of the shaft shoulder.
As shown in fig. 8, the tilting pad elastic structure 20 comprises: the bearing bush 21, the elastic device 24 and the tilting bearing bush supporting seat;
the bearing bush 21 is arranged between the bearing block 28 and the shaft shoulder 18, the first side of the bearing bush is connected with the shaft shoulder 18 in a sliding mode, and the outer surface of the first side of the bearing bush is matched with the outer surface of the shaft shoulder.
As shown in fig. 7, the tilting pad support base is disposed between the bearing block 28 and the pad 21, and includes: a first bearing shoe support seat 22 and a second bearing shoe support seat 23.
The first bearing bush supporting seat 22 is arranged between the second bearing bush supporting seat 23 and the bearing bush 21; wherein the first side of the first shoe support base faces the shoe 21 and the second side of the first shoe support base faces the second shoe support base 23.
As shown in fig. 7 and 8, a second blind hole matched with the first side of the first bearing bush support seat is formed in a second side of the bearing bush opposite to the first side of the bearing bush, and the first side of the first bearing bush support seat is embedded in the second blind hole.
The first side of the first bearing bush supporting seat is further provided with a first blind hole matched with the elastic device 24, and the elastic device 24 is embedded into the first blind hole in a pre-compression mode and is located between the first bearing bush supporting seat 22 and the bearing bush 21. The elastic pressing force in the axial direction of the spindle is applied to the bearing bush 21 by the elastic device 24.
The second bearing shoe support seat 23 is disposed between the bearing seat 28 and the first bearing shoe support seat 22 and fixedly connected to the bearing seat 28. A gap is provided between the second bearing bush support 23 and the bearing bush 21, and the pre-compression amount of the elastic device 24 is larger than the gap. With the second bearing shoe support first side facing the first bearing shoe support 22 and the second bearing shoe support second side facing the bearing seat 28.
As shown in fig. 7 and 8, the first side of the second bearing shoe support seat is slidably connected to the second side of the first bearing shoe support seat by a spherical arc surface 25.
As shown in fig. 7, along the circumferential direction of the main shaft 12, the inner walls of the two sides of the bearing seat are provided with a plurality of first mounting grooves matched with the second sides of the second bearing bush supporting seats, the second sides of the second bearing bush supporting seats are fixedly embedded in the first mounting grooves, and one first mounting groove corresponds to one second bearing bush supporting seat 23.
When the wind load direction of the wind turbine changes, the magnitude and direction of the load transmitted by the impeller 11 to the main shaft 12 may change. When the wind load direction changes, through the spherical arc surface 25 between the first bearing bush supporting seat 22 and the second bearing bush supporting seat 23, the bearing bush 21 can be adjusted in direction in real time, the bearing bush 21 can be kept attached to the shaft shoulder 18, the contact surface between the bearing bush 21 and the shaft shoulder 18 is increased, and the bearing capacity and the service life of the bearing bush 21 are improved. When the wind load direction and magnitude change, part of the bearing bush 21 is not loaded or the load becomes smaller, so that the disc spring corresponding to the bearing bush 21 generates an elastic deformation restoring force. Under the elastic deformation restoring force, the bearing bush 21 is pushed toward the shoulder 18, the bearing bush 21 is kept in contact with the shoulder 18, and the shoulder 18 is constantly given a thrust force in the axial direction of the main shaft. Therefore, even when the load of the wind turbine is changed suddenly, the sliding bearing has excellent shock resistance, and the wind turbine can work more stably and reliably.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An elastically tiltable bush sliding bearing for a wind turbine, a first end of a main shaft of the wind turbine being directed towards a hub of the wind turbine, the sliding bearing comprising:
the bearing block is fixedly connected with the main frame; the bearing seat is sleeved outside the first end of the main shaft of the wind turbine and is concentric with the main shaft;
the tilting pad elastic structures are connected and arranged between the bearing seat and the main shaft along the circumferential direction of the main shaft;
the tilting pad elastic structure comprises: the bearing comprises a bearing bush, an elastic device and a tilting bearing bush supporting seat;
the bearing bush is arranged between the bearing block and the main shaft, the first side of the bearing bush is connected with the outer side wall of the first end of the main shaft in a sliding mode, and the outer surface of the first side of the bearing bush is matched with the outer surface of the first end of the main shaft;
the tilting bearing bush supporting seat is connected and arranged between the bearing block and the bearing bush; the elastic device is pre-compressed between the tilting bearing bush supporting seat and the bearing bush and applies elastic pressing force in the radial direction of the main shaft to the bearing bush; through the cooperation of the tilting bearing bush supporting seat and the elastic device, the bearing bush can be tilted and attached to the main shaft.
2. The resilient tilting pad sliding bearing of a wind turbine according to claim 1, wherein said tilting pad supporting seat comprises: the first bearing bush supporting seat and the second bearing bush supporting seat are connected in a sliding mode;
the first bearing bush supporting seat is arranged between the second bearing bush supporting seat and the bearing bush;
the second bearing bush supporting seat is arranged between the bearing seat and the first bearing bush supporting seat and is fixedly connected with the bearing seat; the second bearing bush supporting seat is connected with the first bearing bush supporting seat in a sliding mode through a spherical arc surface; a gap is arranged between the second bearing bush supporting seat and the bearing bush;
the elastic device is arranged between the first bearing bush supporting seat and the bearing bush.
3. The elastically tiltable bush sliding bearing of a wind turbine according to claim 2, wherein said first bush supporting seat is provided at a first side thereof with a first blind hole adapted to said elastic means, said elastic means being embedded in said first blind hole; the first side of the first bearing bush supporting seat faces the bearing bush.
4. The resiliently tiltable bearing bush sliding bearing of claim 2, wherein a second side of the bearing bush opposite the first side of the bearing bush is provided with a second blind bore matching the first side of the first bearing bush support seat, the first side of the first bearing bush support seat being nestingly disposed within said second blind bore.
5. The elastically tiltable bush sliding bearing of a wind turbine as claimed in claim 2, wherein a plurality of first mounting grooves are provided in the inner side of the bearing housing in the circumferential direction of the main shaft to match with the second sides of the second bush support seats, the second sides of the second bush support seats being fixedly inserted into said first mounting grooves, one first mounting groove corresponding to one second bush support seat; the second side of the second bearing bush supporting seat faces the bearing seat.
6. An elastically tiltable bush-type sliding bearing for a wind turbine, the outer wall of a first end of a main shaft of the wind turbine being provided with an annular shoulder concentric with said main shaft, the two sides of the shoulder facing towards a hub/gearbox of the wind turbine, respectively, the sliding bearing comprising:
the bearing block is fixedly connected with the main frame; the bearing seat is sleeved outside the shaft shoulder and is concentric with the main shaft; the bearing blocks are respectively faced to the hub/gearbox of the wind turbine on both sides;
the tilting pad elastic structures are connected and arranged between the bearing seat and the shaft shoulder along the circumferential direction of the main shaft; the plurality of tilting pad elastic structures are distributed on two sides of the shaft shoulder;
the tilting pad elastic structure comprises: the bearing comprises a bearing bush, an elastic device and a tilting bearing bush supporting seat;
the bearing bush is arranged between the bearing block and the shaft shoulder, the first side of the bearing bush is connected with the shaft shoulder in a sliding mode, and the outer surface of the first side of the bearing bush is matched with the outer surface of the shaft shoulder;
the tilting bearing bush supporting seat is connected and arranged between the bearing block and the bearing bush; the elastic device is pre-compressed between the tilting bearing bush supporting seat and the bearing bush and applies elastic pressing force in the axial direction of the main shaft to the bearing bush; through the cooperation of the tilting bearing bush supporting seat and the elastic device, the bearing bush can be tilted and attached to the shaft shoulder.
7. The resilient tilting pad sliding bearing of a wind turbine according to claim 6, wherein said tilting pad supporting seat comprises: the first bearing bush supporting seat and the second bearing bush supporting seat are connected in a sliding mode;
the first bearing bush supporting seat is arranged between the second bearing bush supporting seat and the bearing bush;
the second bearing bush supporting seat is arranged between the bearing seat and the first bearing bush supporting seat and is fixedly connected with the bearing seat; the second bearing bush supporting seat is connected with the first bearing bush supporting seat in a sliding mode through a spherical arc surface; a gap is arranged between the second bearing bush supporting seat and the bearing bush;
the elastic device is arranged between the first bearing bush supporting seat and the bearing bush.
8. The elastically tiltable bush sliding bearing of a wind turbine according to claim 7, wherein said first bush supporting seat is provided at a first side thereof with a first blind hole adapted to said elastic means, said elastic means being embedded in said first blind hole; the first side of the first bearing bush supporting seat faces the bearing bush.
9. The resiliently tiltable bearing bush sliding bearing of claim 7, wherein a second side of the bearing bush opposite the first side of the bearing bush is provided with a second blind bore matching the first side of the first bearing bush support seat, the first side of the first bearing bush support seat being nestingly disposed within said second blind bore.
10. The elastically tiltable bush sliding bearing of claim 7, wherein the bearing housing is provided with a plurality of first mounting grooves formed on inner walls of both sides thereof in a circumferential direction of the main shaft to be matched with second sides of the second bush support seats, the second sides of the second bush support seats being fixedly inserted into the first mounting grooves, one first mounting groove corresponding to one second bush support seat; the second side of the second bearing bush supporting seat faces the bearing seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110246140.7A CN112922957A (en) | 2021-03-05 | 2021-03-05 | Elastic tilting bearing bush sliding bearing of wind turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110246140.7A CN112922957A (en) | 2021-03-05 | 2021-03-05 | Elastic tilting bearing bush sliding bearing of wind turbine |
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| Publication Number | Publication Date |
|---|---|
| CN112922957A true CN112922957A (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110246140.7A Pending CN112922957A (en) | 2021-03-05 | 2021-03-05 | Elastic tilting bearing bush sliding bearing of wind turbine |
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| CN (1) | CN112922957A (en) |
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| JPH07180721A (en) * | 1993-12-24 | 1995-07-18 | Toshiba Corp | Tilting pad journal bearing device |
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| CN207777403U (en) * | 2018-01-18 | 2018-08-28 | 申科滑动轴承股份有限公司 | A kind of Tilting Pad Journal Bearing of adjustable clearance |
| JP2020016312A (en) * | 2018-07-27 | 2020-01-30 | 株式会社日立製作所 | Oil bath type sliding bearing device and rotary machine |
| CN111094773A (en) * | 2017-09-20 | 2020-05-01 | 西门子歌美飒可再生能源公司 | Fluid film bearing for wind turbine |
| CN112211903A (en) * | 2020-10-23 | 2021-01-12 | 东方电气集团东方汽轮机有限公司 | Uniform-load sliding bearing |
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2021
- 2021-03-05 CN CN202110246140.7A patent/CN112922957A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07180721A (en) * | 1993-12-24 | 1995-07-18 | Toshiba Corp | Tilting pad journal bearing device |
| JPH0932848A (en) * | 1995-07-19 | 1997-02-04 | Mitsubishi Heavy Ind Ltd | Tilting pad bearing |
| CN201057219Y (en) * | 2007-06-06 | 2008-05-07 | 中国航空工业第一集团公司沈阳发动机设计研究所 | Bendable thrust sliding bearing |
| CN101761546A (en) * | 2009-11-04 | 2010-06-30 | 西安交通大学 | Combined radial sliding bearing with tilting pad and fixed pad |
| CN107448365A (en) * | 2016-05-31 | 2017-12-08 | 西门子公司 | Wind turbine including sliding bearing |
| CN111094773A (en) * | 2017-09-20 | 2020-05-01 | 西门子歌美飒可再生能源公司 | Fluid film bearing for wind turbine |
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Application publication date: 20210608 |