GB2080888A - Bearing assembly - Google Patents

Bearing assembly Download PDF

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Publication number
GB2080888A
GB2080888A GB8024777A GB8024777A GB2080888A GB 2080888 A GB2080888 A GB 2080888A GB 8024777 A GB8024777 A GB 8024777A GB 8024777 A GB8024777 A GB 8024777A GB 2080888 A GB2080888 A GB 2080888A
Authority
GB
United Kingdom
Prior art keywords
axial
clearance
race
ring
races
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Withdrawn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
GB8024777A
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.)
Rolls Royce PLC
Original Assignee
Rolls Royce PLC
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 Rolls Royce PLC filed Critical Rolls Royce PLC
Priority to GB8024777A priority Critical patent/GB2080888A/en
Publication of GB2080888A publication Critical patent/GB2080888A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
    • F01D25/162—Bearing supports
    • F01D25/164—Flexible supports; Vibration damping means associated with the bearing
    • 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
    • F16C27/04—Ball or roller bearings, e.g. with resilient rolling bodies
    • F16C27/045—Ball or roller bearings, e.g. with resilient rolling bodies with a fluid film, e.g. squeeze film damping
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Support Of The Bearing (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

A bearing assembly comprises rollers 10 arranged between races 11, 12 the outer one, 12, of which has shoulders 19 between which is situated a ring 15 supported in a housing 14. A radial clearance 16 between the outer race and the ring is provided for the purpose of a hydrodynamic oil film whereby to support the outer race for limited eccentric motion. The oil seeps from the clearance 16 through relatively smaller axial clearances 22 formed between confronting end faces of the ring and the shoulders, the oil supply to the film being continually replenished by a pump 17. The arrangement ensures good control over the axial clearances. <IMAGE>

Description

SPECIFICATION Bearing assembly This invention relates to bearing assemblies of the kind comprising rolling elements arranged between an inner and an outer race, support structure, and a radial clearance between one of the races and the support structure for the formation of a hydrodynamic film in said clearance.
In such an assembly said radial clearance requires the provision of a relatively smaller axial clearance through which the liquid can seep away, the loss being continually made good by a liquid pressure supply.
Hitherto the axial clearance has been produced by careful sizing of components which control the axial position of said one of the races. Such careful sizing is not always appropriate or economical if a number of axially successive such components is involved so that the axial clearance is subject to the cummulation of machining tolerances in the axial length of the individual components. It is an object of this invention to overcome this difficulty.
According to this invention the bearing assembly is characterized by an annular member arranged between said one of the races and said support structure, said annular member being located radially by said support structure, said radial clearance being defined between said one of the races and said member, and said member being related axially to said one of the races by axial surfaces of the member confronting axial surfaces of the race, and said axial clearance being defined between confronting said surfaces.
Thus, by means of the invention, the axial clearance is defined independently of any components for locating said one of the races axially, and said member need not have a rigid axial location on the support structure, at any rate such location is not required for defining said axial clearance.
Examples of a bearing assembly according to this invention will now be described with reference to the accompanying drawing which shows, in a single figure, a sectional elevation of the assembly, different embodiments of the invention being shown in the upper and lower halves of the figure.
Referring to the upper half of the figure, rollers 10 are arranged between an inner race 11 defined on a shaft 1 3 and an outer race 1 2 supported in a support structure on housing 14. Radially between the race 12 and the housing 1 4 there is provided an annular member or ring 1 5 which has an interference fit or a firm sliding fit in the housing 1 4. A radial clearance 1 6 between the ring 1 5 and the race 1 2 is provided for the formation therein of a hydrodynamic film by which the race 1 2 is supported for limited eccentric motion.The clearance 1 6 is supplied with oil under pressure from a pump 1 7 through passages 18.
The ring 1 5 is situated between two shoulders 1 9 provided on the race 1 2 so that, at each axial end of the ring, an end face 20 of the ring confronts an end face 21 of the adjacent shoulder 1 9 across an axial clearance 22. The clearances 22, at the respective shoulders 1 9 are smaller than the radial clearance 1 6 so that a given pressure can be maintained in the clearance 1 6 as required for the operation of said film. To make possible assembly of the ring 1 5 between the shoulders 19, the ring is made in halves joined at a diametrical plane.
The race 1 2 is located against rotation by a component 23 mounted in the housing 14 in accordance with known practice in bearings supported by a hydrodynamic film, the location being shown at 24.
Axial location may be provided for the ring 1 5 between the housing 14 and the member 23.
In the embodiment shown in the lower half of the figure, there is shown a ring 1 5A which is equivalent to the ring 1 5 in that it defines a radial clearance 1 6A with the race 1 2. However, the race 1 2 is situated bteween two internal shoulders 1 9A provided on the ring 15A. At each shoulder 1 9A an end face 21 A of the race 1 2 confronts an end face 20A of the shoulder 1 9A across an axial clearance 22A. The ring 15A is secured against axial displacement by the housing 14 and a component 23A, the latter also serving to locate the ring 15A against rotation as shown at 24A.
1. Bearing assembly comprising rolling elements arranged between an inner and an outer race, support structure, and a radial clearance between one of the races and the support structure for the formation of a hydrodynamic film in said clearance, characterized by an annular member arranged between said one of the races and said support structure, said annular member being located radially by said support structure, said radial clearance being defined between said one of the races and said member, and said member being related axially to said one of the races by axial surfaces of the member confronting axial surfaces of the race, and said axial clearance being defined between confronting said surfaces.
2. Bearing assembly according to claim 1 wherein said annular member is arranged between two shoulders provided on said one of the races, and wherein at each axial end of the member an end face of the member confronts an end face of the adjacent one of said shoulders, and a said axial clearance is defined between the confronting said surfaces
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (4)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Bearing assembly This invention relates to bearing assemblies of the kind comprising rolling elements arranged between an inner and an outer race, support structure, and a radial clearance between one of the races and the support structure for the formation of a hydrodynamic film in said clearance. In such an assembly said radial clearance requires the provision of a relatively smaller axial clearance through which the liquid can seep away, the loss being continually made good by a liquid pressure supply. Hitherto the axial clearance has been produced by careful sizing of components which control the axial position of said one of the races. Such careful sizing is not always appropriate or economical if a number of axially successive such components is involved so that the axial clearance is subject to the cummulation of machining tolerances in the axial length of the individual components. It is an object of this invention to overcome this difficulty. According to this invention the bearing assembly is characterized by an annular member arranged between said one of the races and said support structure, said annular member being located radially by said support structure, said radial clearance being defined between said one of the races and said member, and said member being related axially to said one of the races by axial surfaces of the member confronting axial surfaces of the race, and said axial clearance being defined between confronting said surfaces. Thus, by means of the invention, the axial clearance is defined independently of any components for locating said one of the races axially, and said member need not have a rigid axial location on the support structure, at any rate such location is not required for defining said axial clearance. Examples of a bearing assembly according to this invention will now be described with reference to the accompanying drawing which shows, in a single figure, a sectional elevation of the assembly, different embodiments of the invention being shown in the upper and lower halves of the figure. Referring to the upper half of the figure, rollers 10 are arranged between an inner race 11 defined on a shaft 1 3 and an outer race 1 2 supported in a support structure on housing 14. Radially between the race 12 and the housing 1 4 there is provided an annular member or ring 1 5 which has an interference fit or a firm sliding fit in the housing 1 4. A radial clearance 1 6 between the ring 1 5 and the race 1 2 is provided for the formation therein of a hydrodynamic film by which the race 1 2 is supported for limited eccentric motion.The clearance 1 6 is supplied with oil under pressure from a pump 1 7 through passages 18. The ring 1 5 is situated between two shoulders 1 9 provided on the race 1 2 so that, at each axial end of the ring, an end face 20 of the ring confronts an end face 21 of the adjacent shoulder 1 9 across an axial clearance 22. The clearances 22, at the respective shoulders 1 9 are smaller than the radial clearance 1 6 so that a given pressure can be maintained in the clearance 1 6 as required for the operation of said film. To make possible assembly of the ring 1 5 between the shoulders 19, the ring is made in halves joined at a diametrical plane. The race 1 2 is located against rotation by a component 23 mounted in the housing 14 in accordance with known practice in bearings supported by a hydrodynamic film, the location being shown at 24. Axial location may be provided for the ring 1 5 between the housing 14 and the member 23. In the embodiment shown in the lower half of the figure, there is shown a ring 1 5A which is equivalent to the ring 1 5 in that it defines a radial clearance 1 6A with the race 1 2. However, the race 1 2 is situated bteween two internal shoulders 1 9A provided on the ring 15A. At each shoulder 1 9A an end face 21 A of the race 1 2 confronts an end face 20A of the shoulder 1 9A across an axial clearance 22A. The ring 15A is secured against axial displacement by the housing 14 and a component 23A, the latter also serving to locate the ring 15A against rotation as shown at 24A. CLAIMS
1. Bearing assembly comprising rolling elements arranged between an inner and an outer race, support structure, and a radial clearance between one of the races and the support structure for the formation of a hydrodynamic film in said clearance, characterized by an annular member arranged between said one of the races and said support structure, said annular member being located radially by said support structure, said radial clearance being defined between said one of the races and said member, and said member being related axially to said one of the races by axial surfaces of the member confronting axial surfaces of the race, and said axial clearance being defined between confronting said surfaces.
2. Bearing assembly according to claim 1 wherein said annular member is arranged between two shoulders provided on said one of the races, and wherein at each axial end of the member an end face of the member confronts an end face of the adjacent one of said shoulders, and a said axial clearance is defined between the confronting said surfaces at the respective said shoulders.
3. Bearing assembly according to claim 1 wherein said one of the races is situated between two shoulders provided on said member, and wherein at each axial end of the race an end face of the race confronts an end face of the adjacent one of the shoulders, and a said axial clearance is defined between the confronting said surfaces at the respective said shoulders.
4. Bearing assembly substantially as described herein with reference to the accompannyinng drawing.
GB8024777A 1980-07-29 1980-07-29 Bearing assembly Withdrawn GB2080888A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8024777A GB2080888A (en) 1980-07-29 1980-07-29 Bearing assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8024777A GB2080888A (en) 1980-07-29 1980-07-29 Bearing assembly

Publications (1)

Publication Number Publication Date
GB2080888A true GB2080888A (en) 1982-02-10

Family

ID=10515114

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8024777A Withdrawn GB2080888A (en) 1980-07-29 1980-07-29 Bearing assembly

Country Status (1)

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GB (1) GB2080888A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3603604A1 (en) * 1985-02-07 1986-08-14 Ishikawajima-Harima Jukogyo K.K., Tokio/Tokyo BEARING FOR ROTATION MACHINES
DE4134604A1 (en) * 1991-10-19 1993-04-22 Schaeffler Waelzlager Kg Rolling bearings with noise attenuation - obtained by means of an oil-filled gap in compound bearing races
FR2696216A1 (en) * 1992-09-29 1994-04-01 Schaeffler Waelzlager Kg Bearing for mounting a machine tool spindle.
WO2003087599A1 (en) * 2002-04-09 2003-10-23 Honeywell International Inc. Bearing assembly with an oil damper
DE10258882A1 (en) * 2002-12-17 2004-07-01 Fev Motorentechnik Gmbh Piston engine has a crankcase and a crankshaft linked by bearing shells with an oil cushion between the two
EP2978954A4 (en) * 2013-03-28 2016-11-30 United Technologies Corp Rear bearing sleeve for gas turbine auxiliary power unit

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3603604A1 (en) * 1985-02-07 1986-08-14 Ishikawajima-Harima Jukogyo K.K., Tokio/Tokyo BEARING FOR ROTATION MACHINES
DE4134604A1 (en) * 1991-10-19 1993-04-22 Schaeffler Waelzlager Kg Rolling bearings with noise attenuation - obtained by means of an oil-filled gap in compound bearing races
DE4134604C2 (en) * 1991-10-19 2000-01-13 Schaeffler Waelzlager Ohg Rolling bearings with noise damping
FR2696216A1 (en) * 1992-09-29 1994-04-01 Schaeffler Waelzlager Kg Bearing for mounting a machine tool spindle.
WO2003087599A1 (en) * 2002-04-09 2003-10-23 Honeywell International Inc. Bearing assembly with an oil damper
US6747383B2 (en) 2002-04-09 2004-06-08 Honeywell International, Inc. Generator with hydraulically mounted stator rotor
DE10258882A1 (en) * 2002-12-17 2004-07-01 Fev Motorentechnik Gmbh Piston engine has a crankcase and a crankshaft linked by bearing shells with an oil cushion between the two
EP2978954A4 (en) * 2013-03-28 2016-11-30 United Technologies Corp Rear bearing sleeve for gas turbine auxiliary power unit
US10329953B2 (en) 2013-03-28 2019-06-25 United Technologies Corporation Rear bearing sleeve for gas turbine auxiliary power unit

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)