WO2012135254A1 - Passage de lubrification de palier - Google Patents

Passage de lubrification de palier Download PDF

Info

Publication number
WO2012135254A1
WO2012135254A1 PCT/US2012/030800 US2012030800W WO2012135254A1 WO 2012135254 A1 WO2012135254 A1 WO 2012135254A1 US 2012030800 W US2012030800 W US 2012030800W WO 2012135254 A1 WO2012135254 A1 WO 2012135254A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
lubricant
axially
bearing assembly
race
Prior art date
Application number
PCT/US2012/030800
Other languages
English (en)
Inventor
Gerald P. Fox
Original Assignee
The Timken Company
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 The Timken Company filed Critical The Timken Company
Publication of WO2012135254A1 publication Critical patent/WO2012135254A1/fr

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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
    • F16C33/6677—Details of supply of the liquid to the bearing, e.g. passages or nozzles from radial inside, e.g. via a passage through the shaft and/or inner ring
    • 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
    • F16C19/386—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 in O-arrangement
    • 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
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6685—Details of collecting or draining, e.g. returning the liquid to a sump
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7813—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race
    • 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

Definitions

  • the present invention is related generally to bearing lubrication systems, and in particular, to a bearing lubricant replenishment system disposed within the stationary bearing race(s) of a sealed bearing having a stationary inner race and a rotating outer race, in which a seal mounting surface rotates with the outer race, and a seal lip rides on an outside diameter of a stationary bearing flange adjacent one end of the rollers, maintaining a narrow bearing width.
  • Wind energy main shaft bearings are often equipped with outboard seals that are integrated, in varying degrees, into the bearing.
  • One such prior art integrated design for use in wind turbines is shown in Figure 1 , is often referred to as a tapered double outer (TDO) bearing (1 ) where the inner bearing races (2) are stationary, while the double outer bearing race (3) rotates with the wind turbine rotor and nose cone system (or other rotating structure supported by the bearing (1 )).
  • the conventional lubricant delivery system disposed within this style of bearing is less than ideal.
  • a seal (4) is mounted in a rotating seal carrier (5) having lubricant circulation or purge holes (6) through which a flow of lubricant may circulate.
  • a lip (7) of the seal (4) rides directly on an outer diameter surface (8) of a large end flange (2A) of the stationary inner bearing race (2).
  • the usual lubricant introduction and replenishment path injects fresh lubricant through a central passage (9) in a stationary spacer (10) disposed between the inner bearing races (2), and purges used lubricant through the lubricant circulation or purge holes (6) in the rotating seal carrier (5).
  • Purging used lubricant through the rotating components of the bearing (1 ) is not ideal because the used lubricant must be subsequently collected and stored in the rotating part of the bearing system until it can be manually disposed of.
  • a bearing assembly configured with a lubrication system which introduces new lubricant, and which purges used lubricant, through the stationary bearing race, but which does not significantly increase the overall width, weight, or material cost of the bearing assembly.
  • the present disclosure provides a sealed bearing having a rotating outer race and a stationary inner race with bearing lubrication passages disposed within the stationary inner race for the delivery of fresh lubricant and for the purging of used lubricant without increasing the axial width of the sealed bearing.
  • a central lubricant delivery passage is disposed in a stationary inner race of the bearing, to deliver a supply of fresh lubricant to a central annular space between adjacent rows of rolling elements within the bearing.
  • At least one axially-aligned lubricant discharge passage is provided through the axially outer flange of the stationary inner race, intersecting a radial discharge passage to provide a lubricant discharge pathway contained within the radial footprint of an associated bearing seal.
  • a central lubricant discharge passage is disposed in a stationary inner race of the bearing, to discharge used lubricant from the central annular space between adjacent rows of rolling elements within the bearing.
  • At least one axially-aligned lubricant delivery passage is provided through the axially outer flange of the stationary inner race, intersecting a radial delivery passage to provide a lubricant delivery pathway contained within the radial footprint of an associated bearing seal through, which fresh lubricant can be delivered into the internal volume of the bearing.
  • Figure 1 is a sectional view of a prior art bearing assembly having a lubricant discharge passage through the rotating seal carrier;
  • Figure 2 is a sectional view of a prior art bearing assembly having a lubricant discharge passage at the outer diameter of the stationary inner race, adjacent to the bearing axial seal surfaces;
  • Figure 3 is a sectional view of a bearing assembly configured with a lubrication passage of the present invention, axially intersecting the outer flange of the stationary inner race.
  • a first embodiment of the present disclosure is shown generally as a bearing assembly (A) having stationary inner races (2) and a rotating outer race (3).
  • the inner races (2) be disposed in butting engagement with the central spacer (2B).
  • the bearing assembly (A) is a sealed bearing, with two rows of rolling elements (RE) disposed between the inner and outer races, and axially enclosed by seals (4) supported on seal carriers (5) which are secured to, and rotate with, the rotating outer race (3).
  • the seals (4) each have seal lips (7) which are generally in sealing contact with an outer surface (8) of each adjacent inner race (2).
  • a lubrication passage (12) is provided radially through the outer peripheral end of each of the bearing stationary inner races (2) within the radial footprint of each seal (4), which can be considered to be a projection radially inward of the contact region between the seal lips (7) and the outer surface (8).
  • Each lubrication passage (12) intersects with an passage (13) aligned parallel to the bearing axis of rotation, within the flange region (2A) of the inner race, radially adjacent to the inner race outer surface (8).
  • Each axial passage (13) opens into an outer chamber (17) of the bearing (2) on an inboard axial face (14) of the flange (2A), and not on the outer circumferential surface (8) of the flange (2A).
  • Each axial passage (13) may optionally extend to an axially outboard end of the inner race flange (2A) where it is closed by a plug (P) or other suitable closure means.
  • each flange (2A) is elongated in a radial direction, relative to the prior art such as shown in Figs. 1 and 2, while the axial width of the flange, and therefore, the overall axial width of the bearing (A), remains unchanged.
  • fresh lubricant is circulated through the bearing assembly (A) of Figure 3 in one of two directions.
  • the first preferred direction utilizes a natural pumping action of the bearing rolling elements (RE) to impart a flow to lubricant delivered through passage (9) in the central spacer (2B) to the bearing center chamber (16) axially outward towards one or the other of the bearing's two outer chambers (17), and injects fresh lubricant into the bearing's center chamber (16) through passage (9).
  • the fresh lubricant is circulated around, and passed over the rolling elements (RE), into the axially outer chambers (17), where it is discharged through axial passages (13) into radial passages (12) in the stationary inner races (2).
  • the second direction in which the fresh lubricant is circulated through the bearing assembly (A) of Figure 3 is the opposite of the first preferred direction described above.
  • fresh lubricant is injected into the bearing assembly through the radial passages (12) discharged into the outer chambers (17) through the axial passages (13) in the axial faces (14) of the flanges (2A).
  • the fresh lubricant will accumulate in these chambers and around the rolling elements (RE), until a sufficient volume of fresh lubricant has been introduced into the outer chambers (17) to push older lubricant past the rolling elements (RE) and into the center chamber (16), where one or more generously sized purge ports (19) in the central spacer (2B) having a diameter which is greater than that of the passages (9), permit the used lubricant to be easily purged or discharged from the bearing assembly (A) through the stationary inner races (2).
  • the bearing assembly (A) employ seals (4) which have a minimum section height to compensate as much as possible for the required increase in the overall diameter of the bearing flange (2A) to accommodate the radial passages (12) and axial passages (13).
  • seals (4) which have a minimum section height to compensate as much as possible for the required increase in the overall diameter of the bearing flange (2A) to accommodate the radial passages (12) and axial passages (13).
  • the bolt circle (20) in the bearing rotating outer race can be kept as small as possible, thus allowing smaller diameter (and less costly) components to be secured to the bearing assembly (A).

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

L'invention porte sur un ensemble palier (A) possédant des bagues intérieures fixes (2) et une bague extérieure rotative (3), l'ensemble possédant des éléments roulants (RE) disposés entre les bagues intérieures et extérieure et qui sont enfermés axialement par des joints (4) supportés par des supports de joints (5) qui sont fixés à la bague extérieure rotative et qui tourne avec cette bague. Un passage de lubrification (12) est disposé radialement à travers chaque bague intérieure fixe du palier pour déboucher dans une partie extérieure (17) de la cage de palier, au niveau d'une face axiale (14) d'une bride extérieure (2A) de la bague intérieure. Le diamètre extérieur de la collerette extérieure (2A) est agrandi dans une direction radiale, pour loger le passage de lubrification qui ouvre sur la face axiale, tandis qu'une largeur axiale de la bride extérieure et, par conséquent, la largeur axiale hors tout du palier, reste inchangée.
PCT/US2012/030800 2011-03-28 2012-03-28 Passage de lubrification de palier WO2012135254A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161468260P 2011-03-28 2011-03-28
US61/468,260 2011-03-28

Publications (1)

Publication Number Publication Date
WO2012135254A1 true WO2012135254A1 (fr) 2012-10-04

Family

ID=45937654

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2012/030800 WO2012135254A1 (fr) 2011-03-28 2012-03-28 Passage de lubrification de palier

Country Status (1)

Country Link
WO (1) WO2012135254A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106762151A (zh) * 2016-11-29 2017-05-31 沈阳黎明航空发动机(集团)有限责任公司 一种航空发动机主轴承内环一体化结构
EP3173642A1 (fr) * 2015-11-27 2017-05-31 ALSTOM Renewables Technologies Wind B.V. Generateur de turbine eolienne avec roulement et element d'etancheite
DE102017106957A1 (de) * 2017-03-31 2018-10-04 Schaeffler Technologies AG & Co. KG Wälzlager
DE102017109777A1 (de) * 2017-05-08 2018-11-08 Schaeffler Technologies AG & Co. KG Abgedichtetes Großwälzlager
US20200025252A1 (en) * 2017-03-31 2020-01-23 Schaeffler Technologies AG & Co. KG Sealed roller bearing

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3497277A (en) * 1968-09-03 1970-02-24 Gen Motors Corp Bearing lubrication
JPH0988986A (ja) * 1995-09-27 1997-03-31 Ntn Corp アンギュラ玉軸受の潤滑冷却方法および装置
JP2003343586A (ja) * 2002-05-29 2003-12-03 Nsk Ltd 密封式転がり軸受
JP2003343587A (ja) * 2002-05-31 2003-12-03 Nsk Ltd 転がり軸受
EP1712806A2 (fr) * 2005-04-15 2006-10-18 Snecma Agencement d'assemblage entre une bague intérieure de palier et un tourillon, bague et tourillon adaptés à un tel agencement, et turbomachine équipée de ceux-ci

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3497277A (en) * 1968-09-03 1970-02-24 Gen Motors Corp Bearing lubrication
JPH0988986A (ja) * 1995-09-27 1997-03-31 Ntn Corp アンギュラ玉軸受の潤滑冷却方法および装置
JP2003343586A (ja) * 2002-05-29 2003-12-03 Nsk Ltd 密封式転がり軸受
JP2003343587A (ja) * 2002-05-31 2003-12-03 Nsk Ltd 転がり軸受
EP1712806A2 (fr) * 2005-04-15 2006-10-18 Snecma Agencement d'assemblage entre une bague intérieure de palier et un tourillon, bague et tourillon adaptés à un tel agencement, et turbomachine équipée de ceux-ci

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3173642A1 (fr) * 2015-11-27 2017-05-31 ALSTOM Renewables Technologies Wind B.V. Generateur de turbine eolienne avec roulement et element d'etancheite
CN106762151A (zh) * 2016-11-29 2017-05-31 沈阳黎明航空发动机(集团)有限责任公司 一种航空发动机主轴承内环一体化结构
DE102017106957A1 (de) * 2017-03-31 2018-10-04 Schaeffler Technologies AG & Co. KG Wälzlager
US20200025252A1 (en) * 2017-03-31 2020-01-23 Schaeffler Technologies AG & Co. KG Sealed roller bearing
US10890215B2 (en) * 2017-03-31 2021-01-12 Schaeffler Technologies AG & Co. KG Sealed roller bearing
DE102017109777A1 (de) * 2017-05-08 2018-11-08 Schaeffler Technologies AG & Co. KG Abgedichtetes Großwälzlager

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