GB2565754A - Main shaft bearing arrangement - Google Patents

Main shaft bearing arrangement Download PDF

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Publication number
GB2565754A
GB2565754A GB1710770.7A GB201710770A GB2565754A GB 2565754 A GB2565754 A GB 2565754A GB 201710770 A GB201710770 A GB 201710770A GB 2565754 A GB2565754 A GB 2565754A
Authority
GB
United Kingdom
Prior art keywords
bearing
main shaft
trunnion
wind turbine
bearing housing
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.)
Withdrawn
Application number
GB1710770.7A
Other versions
GB201710770D0 (en
Inventor
Smith Richard
Macindoe Scott
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Insight Analytics Solutions Ltd
Original Assignee
Insight Analytics Solutions Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Insight Analytics Solutions Ltd filed Critical Insight Analytics Solutions Ltd
Priority to GB1710770.7A priority Critical patent/GB2565754A/en
Publication of GB201710770D0 publication Critical patent/GB201710770D0/en
Priority to PCT/GB2018/051875 priority patent/WO2019008350A1/en
Publication of GB2565754A publication Critical patent/GB2565754A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0695—Mounting of ball-joints, e.g. fixing them to a connecting rod
    • 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
    • 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
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
    • 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
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • 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
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/385—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F16C19/545—Systems comprising at least one rolling bearing for radial load in combination with at least one rolling bearing for axial load
    • 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
    • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/02—Sliding-contact bearings
    • F16C23/04—Sliding-contact bearings self-adjusting
    • F16C23/043—Sliding-contact bearings self-adjusting with spherical surfaces, e.g. spherical plain bearings
    • F16C23/045—Sliding-contact bearings self-adjusting with spherical surfaces, e.g. spherical plain bearings for radial load mainly, e.g. radial spherical plain 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
    • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/06—Ball or roller bearings
    • F16C23/08—Ball or roller bearings self-adjusting
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/042—Housings for rolling element bearings for rotary movement
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/067—Fixing them in a housing
    • 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
    • F05B2240/54—Radial 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
    • F16C2237/00—Repair or replacement
    • 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

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)
  • Support Of The Bearing (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Wind Motors (AREA)

Abstract

A bearing system for supporting a rotating main shaft 1 of a wind turbine, wherein the bearing housing 2 which contains the bearing(s) (not shown) supporting the main shaft has two diametrically opposed protruding studs in the form of trunnions, the trunnions being fitted with spherical bearings 7 and housed inside pillow blocks 3, 8 fixed to a stationary support structure. The trunnions with their spherical bearings accommodate axial loads. The bearing(s) inside the trunnion bearing housing 2 may be of various types, such as double row tapered roller bearing(s) (DRTB) and cylindrical roller bearing(s) (CRB), and accommodate misalignment and radial loads. A three-point mount configuration (fig. 1) with the main shaft supported between the gearbox torque arms and a single trunnion bearing housing and a four-point mount configuration (fig. 2) with the main shaft supported between the gearbox torque arms and two trunnion bearing housings are envisaged. A method for retro-fitting a wind turbine with this bearing system is also claimed, where the bolt holes for the pillow block assemblies are in the exact same position as those of the removed prior bearing assemblies and use the same fixings to facilitate replacement.

Description

Main Shaft Bearing Arrangement
Technical Field
The present invention relates to bearing arrangements for main shafts within wind turbine generators, and in particular where the drivetrain of the wind turbine generator is supported by either one main bearing - commonly known as a threepoint-mount, or two main bearings - commonly known as either two or four-point mount.
Background Art
Spherical roller bearings are used extensively within the wind turbine industry to support the main shafts of drive trains. They are used within three-point mount systems (one main bearing and two arms of the gearbox) and two I four-point mount systems (two main bearings and two arms of the gearbox). These main shafts are subject to static and dynamic bending, misalignment, radial loads and axial loads. The spherical roller bearings are selected as historically they provide a one-stopshop to accommodate the above five parameters
Within most non-direct-drive wind turbine generators, the drivetrains of said equipment is supported by either one or two main bearings. These bearings are commonly of the double row spherical roller bearing design. While these bearings are excellent at accommodating misalignment and radial load, they have limited capacity with axial load. This limitation regularly leads to premature failure. Other, more conventional bearing types are available which have superior load capacities but are limited due to their inability to accommodate misalignment, both static and dynamic.
-2WO2016178649 relates to an approach for avoiding this issue when spherical roller bearings are used, which employs preloaded tapered roller bearings in their place. The preloaded, double-row tapered roller bearing design aims to facilitate proper load share between the two rows of rollers to help reduce or eliminate the roller/raceway sliding and skidding/smearing associated with conventional spherical roller bearing damage. However, this approach does not handle large axial (thrust) loads.
The present invention provides a design of bearing housing that allows for the misalignment and static & dynamic bending to be accommodated, and which incorporates conventional bearings and can be retro-fitted to existing installations.
Summary of the Invention
The present invention discloses a wind turbine bearing system for supporting a rotating main shaft of a wind turbine. The system comprises: a bearing assembly and a pillow block housing assembly configured for attachment to a stationary support structure. The bearing assembly comprises a trunnion bearing comprises a trunnion bearing, and the pillow block assembly comprises a spherical bearing between the pillow block and the trunnion bearing.
Brief Description of the Drawings
The invention will now be disclosed with reference to the drawings, in which:
Figure 1 shows a side and plan views of a 3-point mount configuration of the present invention; and
Figure 2 shows a side and plan views of a 4-point mount configuration of the present invention; and
-3Disclosure of Invention
Referring to Figure 1, which shows a 3-point mount configuration for a wind turbine using a double row taper roller bearing (DRTB; not shown), a main shaft 1 having an upwind side and a downwind side connects the main rotor (not shown) at the upwind side with the gearbox (not shown) at the downwind side.
Trunnion bearing housing 2 connects to pillow block assemblies 3,8 via a spherical bearing 7. Enclosed by the trunnion bearing housing 2 is a bearing arrangement for supporting shaft 1. Typically, this is a DRTB, which accommodates misalignment and radial load, whilst the trunnion accommodates axial load. Other bearings able to accommodate misalignment and radial load can be used in place of the DRTB.
The 3-point mount configuration additionally comprises a number of features which are in common with a conventional arrangement not including the trunnion/spherical bearing feature of the present invention. These facilitate retrofit of the trunnion/spherical bearing feature to an existing wind turbine and include the following: rear inner race lock ring device 4; rear downwind grease retainer ring device 5; and rear upwind grease retainer ring device 6.
Thus, this arrangement facilitates the replacement of the existing bearing assembly with the existing assembly with the trunnion system. When maintenance of the bearings is required, main shaft 1 is removed. Replacement bearing housing mount 3,8 and trunnion bearing housing 2 are fitted in place of the existing bearing housing. The bolt holes and fixings in the bearing housing mounts 3,8 are the same as in the existing bearing housing mount, which has been removed. The
-4replacement DRTB assembly fits inside the trunnion housing, and the main shaft can be slid back into place.
Referring to Figure 2, which shows a 4-point mount configuration for a wind turbine using a double row taper roller bearing (DRTB; not shown) and a cylindrical Roller Bearing (CRB; not shown), a main shaft 1 having an upwind side and a downwind side connects the main rotor (not shown) at the upwind side with the gearbox (not shown) at the downwind side.
At the upwind side, trunnion bearing housing 9 connects to pillow block assemblies 10,15 via a spherical bearing 14. Enclosed by the trunnion bearing housing 9 is a bearing arrangement for supporting shaft 1. Typically, this is a DRTB, which accommodates misalignment and radial load, whilst the trunnion accommodates axial load. Other bearings able to accommodate misalignment and radial load can be used in place of the DRTB.
At the downwind side, bearing housing 2 connects to pillow block assemblies 3,8 via a spherical bearing 7. Enclosed by the trunnion bearing housing 2 is a bearing arrangement for supporting shaft 1. Typically, this is a CRB, which accommodates misalignment and radial load, whilst the trunnion accommodates axial load. Other bearings able to accommodate misalignment and radial load can be used in place of the CRB.
The 4-point mount configuration additionally comprises a number of features which are in common with a conventional arrangement not including the trunnion/spherical bearing feature of the present invention. These facilitate retrofit of the trunnion/spherical bearing feature to an existing wind turbine and include the following: rear inner race lock ring device 4; rear downwind grease retainer ring
-5device 5; rear upwind grease retainer ring device 6; front inner race lock ring device 11; front downwind grease retainer ring device 12; and front upwind grease retainer ring device 13.
Thus, this arrangement facilitates the replacement of the existing bearing assembly with the existing assembly with the trunnion system. When maintenance of the bearings is required, main shaft 1 is removed. Replacement bearing housing mounts 3,8 and 10,15 and trunnion bearing housing 2,9 are fitted in place of the existing bearing housing. The bolt holes and fixings in the bearing housing mounts 3,8,10,15 are the same as in the existing bearing housing mount, which has been removed. The replacement DRTB or CRB assembly fits inside the trunnion housings
2,9, and main shaft 1 can be slid back into place.

Claims (2)

1. A wind turbine bearing system for supporting a rotating main shaft of a wind turbine, the system comprising:
a trunnion bearing housing supporting a bearing structure supporting the main shaft;
a pillow block housing assembly configured for attachment to a stationary support structure;
wherein the trunnion bearing housing engages a spherical bearing between the pillow block and the trunnion bearing.
2. A method for replacing a bearing system for supporting a rotating main shaft of a wind turbine, the method comprising the steps of:
removing the main shaft;
removing the existing bearing system;
replacing existing bearing housing mounts with bearing housing mounts comprising a spherical bearing;
fitting trunnion bearing housing; and replacing the main shaft.
GB1710770.7A 2017-07-04 2017-07-04 Main shaft bearing arrangement Withdrawn GB2565754A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1710770.7A GB2565754A (en) 2017-07-04 2017-07-04 Main shaft bearing arrangement
PCT/GB2018/051875 WO2019008350A1 (en) 2017-07-04 2018-07-04 Main shaft bearing arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1710770.7A GB2565754A (en) 2017-07-04 2017-07-04 Main shaft bearing arrangement

Publications (2)

Publication Number Publication Date
GB201710770D0 GB201710770D0 (en) 2017-08-16
GB2565754A true GB2565754A (en) 2019-02-27

Family

ID=59592596

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1710770.7A Withdrawn GB2565754A (en) 2017-07-04 2017-07-04 Main shaft bearing arrangement

Country Status (2)

Country Link
GB (1) GB2565754A (en)
WO (1) WO2019008350A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191204270A (en) * 1911-03-07 1912-05-02 Rheinische Metallw & Maschf Improvements in the Supports of Pivoted Guns.
US4565929A (en) * 1983-09-29 1986-01-21 The Boeing Company Wind powered system for generating electricity
EP0216252A2 (en) * 1985-09-23 1987-04-01 Siemens Aktiengesellschaft Bearing flange for a braced single-sided and braced axial stored external rotor motor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004042235B4 (en) * 2004-09-01 2013-06-06 Ab Skf Bearing arrangement of a wind turbine
ES2552878T3 (en) * 2010-09-30 2015-12-02 Vestas Wind Systems A/S Wind turbine with bearing support
DE212015000310U1 (en) 2015-05-01 2018-01-23 The Timken Company Main shaft bearing for a wind turbine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191204270A (en) * 1911-03-07 1912-05-02 Rheinische Metallw & Maschf Improvements in the Supports of Pivoted Guns.
US4565929A (en) * 1983-09-29 1986-01-21 The Boeing Company Wind powered system for generating electricity
EP0216252A2 (en) * 1985-09-23 1987-04-01 Siemens Aktiengesellschaft Bearing flange for a braced single-sided and braced axial stored external rotor motor

Also Published As

Publication number Publication date
WO2019008350A1 (en) 2019-01-10
GB201710770D0 (en) 2017-08-16

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