WO2015070141A1 - Cage de roulement et ensemble à flux dirigé - Google Patents

Cage de roulement et ensemble à flux dirigé Download PDF

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Publication number
WO2015070141A1
WO2015070141A1 PCT/US2014/064800 US2014064800W WO2015070141A1 WO 2015070141 A1 WO2015070141 A1 WO 2015070141A1 US 2014064800 W US2014064800 W US 2014064800W WO 2015070141 A1 WO2015070141 A1 WO 2015070141A1
Authority
WO
WIPO (PCT)
Prior art keywords
cage
chamber
axial end
pair
lubricant
Prior art date
Application number
PCT/US2014/064800
Other languages
English (en)
Inventor
Brian Werner
William Hannon
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 WO2015070141A1 publication Critical patent/WO2015070141A1/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
    • F16C33/46—Cages for rollers or needles
    • F16C33/467—Details of individual pockets, e.g. shape or roller retaining means
    • F16C33/4682—Details of individual pockets, e.g. shape or roller retaining means of the end walls, e.g. interaction with the end faces of the rollers
    • 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
    • F16C19/24—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 radial load mainly
    • F16C19/26—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 radial load mainly with a single row of rollers
    • 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/4617—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages
    • F16C33/4623—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages
    • F16C33/4635—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages made from plastic, e.g. injection moulded window cages
    • 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
    • F16C33/6666—Details of supply of the liquid to the bearing, e.g. passages or nozzles from an oil bath in the bearing housing, e.g. by an oil ring or centrifugal disc
    • 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
    • F16C33/6681—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
    • 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
    • F16C2300/02—General use or purpose, i.e. no use, purpose, special adaptation or modification indicated or a wide variety of uses mentioned

Definitions

  • the present invention relates to bearing assemblies, and more particularly to a bearing assembly including a bearing cage configured to collect lubricant and distribute the lubricant to a desired area during operation.
  • the invention provides a bearing assembly including an inner ring, an outer ring, and a plurality of rolling elements situated between the inner and outer rings.
  • the plurality of rolling elements facilitates relative rotation between the inner and outer rings about an axis, and each rolling element has opposing axial end faces.
  • a cage is situated between the inner and outer rings, the cage including a pair of axial end flanges and a plurality of bridges extending between the axial end flanges.
  • At least one of the pair of axial end flanges of the cage includes at least one lubrication unit including an enclosed chamber, an inlet in fluid communication with the chamber, and an outlet in fluid communication with the chamber.
  • the invention provides a cage for use in a rolling element bearing assembly.
  • the cage includes a pair of ring-shaped axial end flanges and a plurality of bridges extending between the pair of axial end flanges. Rolling element pockets are defined between each adjacent pair of bridges.
  • At least one of the pair of axial end flanges includes at least one lubrication unit including an enclosed chamber, an inlet in fluid communication with the chamber, and an outlet in fluid communication with the chamber.
  • the inlet is configured to take in liquid lubricant upon rotation of the cage and to direct the lubricant along a predominantly tangential path into the chamber.
  • the outlet is configured to dispense the liquid lubricant from the chamber to an interior axial end face of the axial end flange that at least partially defines one of the rolling element pockets.
  • FIG. 1 is a front view of a bearing assembly according to one aspect of the invention.
  • Fig. 2 is a cross-sectional view, taken along line 2-2 of the bearing assembly of Fig. 1.
  • FIG. 3 is a front view of a bearing cage of the bearing assembly of Fig. 1.
  • Fig. 4 is a cross-sectional view, taken along line 4-4 of the bearing cage of Fig. 3.
  • Fig. 5 is a side view of the bearing cage of Fig. 3.
  • Fig. 6 is a cross-sectional view, taken along line 6-6 of the bearing cage of Fig. 5.
  • Fig. 7 is a cross-sectional view, taken along line 7-7 of the bearing cage of Fig. 5.
  • Fig. 8 is a cross-sectional view, taken along line 8-8 of the bearing cage of Fig. 6.
  • a bearing assembly 20 includes an inner ring 24, and outer ring 28, and a plurality of circumferentially-distributed rolling elements 32 positioned between the inner and outer rings 24, 28.
  • the inner and outer rings 24, 28 share a common bearing axis A.
  • the bearing assembly 20 provides low friction (i.e., rolling) support of a first component (e.g., a rotating shaft) within a second component (e.g., a stationary housing).
  • the inner ring 24 includes a radially inner surface 26 secured with the first component
  • the outer ring 28 includes a radially outer surface 30 secured with the second component.
  • Each of the rolling elements 32 defines a rolling surface in contact with raceway surfaces of both the inner and outer rings 24, 28.
  • the rolling elements 32 have cylindrical rolling surfaces, but other constructions (i.e., tapered, spherical) are optional.
  • a cage 36 extends circumferentially around the bearing axis A at a radial position that is between the inner ring 24 and the outer ring 28.
  • the cage 36 includes a pair of opposed axial end flanges 38 and a plurality of bridges 40 extending generally axially between the two end flanges 38 (Fig. 2).
  • a roller pocket is defined between each adjacent pair of bridges 40, and thus, the cage 36 maintains a predetermined spacing between all of the rolling elements 32.
  • the bearing assembly 20 can be configured to accommodate a 60mm diameter shaft, to be accommodated in a 1 10mm housing aperture, and to have an axial depth of about 22mm, but alternate configurations are optional.
  • One or both of the inner and outer rings 24, 28 can include one or two ribs to retain the rolling elements 32 therein.
  • the inner ring 24 includes a single rib 42 that extends radially outward to overlap with the axial end faces of the plurality of rolling elements 32 on a first axial end of the bearing assembly 20.
  • the outer ring 28 includes a pair of ribs 46 that extend radially inward to overlap with the axial end faces of the plurality of rolling elements 32 on both axial ends of the bearing assembly 20.
  • a potential for wear exists as the bearing assembly 20 is in operation and the rolling elements 32 travel circumferentially with respect to the inner and outer rings 24, 28.
  • These interfaces can be a difficult location to ensure adequate lubrication during use.
  • the cage 36 is provided with a lubrication collection and distribution system as described in further detail below.
  • a chamber 50 or series of chambers in one or both of the flanges 38 of the cage 36 are provided to store a supply of lubricant (e.g., liquid oil).
  • An inlet orifice 54 in fluid communication with the chamber 50 has a geometry designed to promote accumulation of lubricant in the chamber 50 and a series of outlet orifices 58 are designed to allow
  • the chamber 50 can be hollow, using only the geometry of the chamber 50, the inlet orifice 54, and the outlet orifices 58 to control the flow of lubricant, or alternately, the chambers 50 can be partially filled such that lubricant is forced to flow around and between obstacles, with the general size and placement of the obstacles being designed to control the lubricant flow.
  • each chamber 50 can be an enclosed chamber (i.e., enclosed from the surroundings except for the respective inlet orifice 54 and outlet orifices 58, in contrast to an open channel or trough).
  • the chamber 50 can be distinguished from the inlet orifice 54 and the outlet orifices 58 by having a larger cross-section than the inlet orifice 54 and the outlet orifices 58.
  • the lubrication collection and distribution system of the cage 36 includes an independent inlet orifice 54, chamber 50, and series of outlet orifices 58 (i.e., a "lubrication unit") for each roller pocket of the cage 36.
  • a lubrication unit for each roller pocket of the cage 36.
  • alternate arrangements are possible, such as a chamber and outlet orifices that extend along and are shared among a plurality of roller pockets, supplied by one or more inlet orifices, or the lubrication units can be provided at spaced intervals in a number less than the total number of roller pockets.
  • the lubrication units can be provided in one or both of the cage flanges 38. As shown in Fig.
  • the inlet orifice 54 can be positioned at a radially outer circumferential surface of the cage flange 38.
  • the inlet orifice 54 can be oriented at or adjacent the location of a bridge 40.
  • the inlet orifice 54 can be arranged on another exterior cage surface (e.g., radially inner circumferential surface) and/or can be oriented at or adjacent the location of a roller pocket.
  • the inlet orifice 54 can open radially inwardly into a passage with increasing cross-sectional area, such as a cone before connecting to the chamber 50.
  • the inlet orifice 54 and the passage make up a tapered inlet, which takes lubricant in more readily than it allows lubricant to escape.
  • the passage between the inlet orifice 54 and the chamber 50 can be arranged to extend along a direction that is neither purely radial nor purely tangential, but is predominantly tangential.
  • the outlet orifices 58 are arranged to extend generally axially toward a centerline of the bearing so that the lubricant is dispersed onto the axial end face(s) of the rolling elements 32.
  • the outlet orifices 58 are provided in interior or inward-facing axial end surfaces 62 that at least partially define the rolling element pockets. This is best shown in Fig. 8.
  • each outlet orifice 58 is coupled to the chamber 50 via a tapered passage (i.e., tapering down in cross- sectional area toward the outlet orifice 58), making a tapered outlet.
  • the shape can be conical, like that of the inlet.
  • each tapered outlet defines an angle of about 10 degrees in cross-section. The tapering down toward the outlet orifice 58 can automatically meter the distribution rate of oil from the chamber 50.
  • the chamber 50 can have a generally cylindrical shape (e.g., having a length of about 12.5mm for the 60mm inner diameter bearing described above).
  • Such a chamber 50 can also have a diameter of about 2.0mm, and the end of the tapered inlet coupled to the chamber 50 can have a diameter of about 1.2mm.
  • the cross-section of the chamber 50 can be larger than the cross section of the inlet passage from the inlet orifice 54 at any point along the length of the inlet passage from the inlet orifice 54 to the chamber 50.
  • the length of the inlet passage between the inlet orifice 54 and the chamber 50 can be more than 30 percent of the chamber length and less than 50 percent of the chamber length.
  • the cage 36 is designed with an intended direction of rotation R (Figs. 6 and 7) within the outer ring 28.
  • the direction of rotation R is defined as the direction in which rotation of the cage 36 results in the inlet orifice 54 leading the chamber 50.
  • the chamber 50 and the orifices 54, 58 in the illustrated construction may be difficult or impossible to be created using conventional cage manufacturing techniques such as stamping, machining or molding.
  • the geometry making up the chamber 50 and the orifices 54, 58 can be readily constructed using additive manufacturing techniques, in which the cage 36 is built by sequential layering of material.
  • the layering material can include one or more polymers.
  • the additive manufacturing process can create the voids including the inlet orifices 54, the chambers 50, and the outlet orifices 58 by leaving voids in the layers as laid, or by including an alternate, dissolvable (e.g., chemically dissolvable) material that is subsequently dissolved away after completion of the layering process.

Landscapes

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

Abstract

L'invention concerne un ensemble roulement comprenant une bague interne, une bague externe et des éléments de roulement situés entre les bagues internes et externes. Les éléments de roulement facilitent une rotation relative entre les bagues interne et externe. Une cage (36) incluant des brides d'extrémité axiales (38) et une pluralité de ponts est située entre les bagues internes et externes. Au moins l'une de la paire de brides d'extrémité axiales de la cage inclut au moins une unité de lubrification incluant une chambre close (50), une admission (54) en communication fluidique avec la chambre et un refoulement (58) en communication fluidique avec la chambre. L'admission est configurée pour accueillir du lubrifiant liquide lors d'une rotation de la cage et pour diriger le lubrifiant le long d'un chemin principalement tangentiel dans la chambre. Le refoulement est configuré pour distribuer le lubrifiant liquide en provenance de la chambre vers l'une des faces d'extrémité axiales d'au moins l'un de la pluralité d'éléments roulants.
PCT/US2014/064800 2013-11-11 2014-11-10 Cage de roulement et ensemble à flux dirigé WO2015070141A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361902390P 2013-11-11 2013-11-11
US61/902,390 2013-11-11

Publications (1)

Publication Number Publication Date
WO2015070141A1 true WO2015070141A1 (fr) 2015-05-14

Family

ID=51999539

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2014/064800 WO2015070141A1 (fr) 2013-11-11 2014-11-10 Cage de roulement et ensemble à flux dirigé

Country Status (1)

Country Link
WO (1) WO2015070141A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9951809B2 (en) 2015-01-16 2018-04-24 Rolls-Royce Plc Rolling-element bearing and method of countering load applied to rolling-element bearing
DE102017102577A1 (de) * 2016-11-10 2018-05-17 Schaeffler Technologies AG & Co. KG Wälzlager

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4192560A (en) * 1978-08-21 1980-03-11 The Torrington Company Bearing with bearing cage
JP2006177515A (ja) * 2004-12-24 2006-07-06 Nsk Ltd 円錐ころ軸受
EP2562437A2 (fr) * 2011-08-25 2013-02-27 United Technologies Corporation Roulement à billes à contact angulaire
JP2013145024A (ja) * 2012-01-16 2013-07-25 Jtekt Corp 円筒ころ軸受用保持器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4192560A (en) * 1978-08-21 1980-03-11 The Torrington Company Bearing with bearing cage
JP2006177515A (ja) * 2004-12-24 2006-07-06 Nsk Ltd 円錐ころ軸受
EP2562437A2 (fr) * 2011-08-25 2013-02-27 United Technologies Corporation Roulement à billes à contact angulaire
JP2013145024A (ja) * 2012-01-16 2013-07-25 Jtekt Corp 円筒ころ軸受用保持器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9951809B2 (en) 2015-01-16 2018-04-24 Rolls-Royce Plc Rolling-element bearing and method of countering load applied to rolling-element bearing
DE102017102577A1 (de) * 2016-11-10 2018-05-17 Schaeffler Technologies AG & Co. KG Wälzlager

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