WO1991005961A2 - Thrust bearing assembly - Google Patents
Thrust bearing assembly Download PDFInfo
- Publication number
- WO1991005961A2 WO1991005961A2 PCT/GB1990/001635 GB9001635W WO9105961A2 WO 1991005961 A2 WO1991005961 A2 WO 1991005961A2 GB 9001635 W GB9001635 W GB 9001635W WO 9105961 A2 WO9105961 A2 WO 9105961A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bearing
- housing
- assembly according
- thrust bearing
- bearing assembly
- Prior art date
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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
- F16C17/06—Sliding-contact bearings for exclusively rotary movement for axial load only with tiltably-supported segments, e.g. Michell bearings
Definitions
- the present invention relates to a thrust bearing assembly for a shaft intended to be used under axial thrust loading.
- U.S. Patents 4738550 and 4456391 disclose tilting pad thrust bearings having segments mounted on tilting and rotation-inhibiting mechanisms located within an annular housing.
- the annular housing is of a "heavy" construction, which is disadvantageous where a bearing having only a small number of thrust segments is required.
- thrust bearings are conventionally designed for "one off” applications, from non-standard components, which adds to the expense of manufacture in terms of tooling up and design costs.
- a thrust bearing assembly for a rotatable shaft which assembly comprises:
- each bearing element and respective housing is provided with biasing means for urging the bearing element into bearing contact with the rotatable shaft or component attached thereto.
- the biasing means preferably comprises at least one disc spring disposed in the housing cavity, preferably between the carrier ring and the respective bearing element.
- each cavity and respective bearing element are shaped and dimensioned so as to substantially inhibit rotation of the bearing element within the housing about an axis substantially normal to the bearing surface.
- each bearing surface is substantially planar.
- each bearing surface makes bearing contact with the surface of an annular component secured to the rotatable shaft, which surface is advantageously plana .
- the plane of bearing contact is substantially perpendicular to the axis of rotation of the shaft.
- the individual securing means comprises one or more threaded bolts provided for each housing member passing through and engaging with corresponding threaded holes provided in the housing member and the bearing carrier ring.
- a plurality of threaded holes are provided on the bearing carrier ring at suitable dispositions enabling a variety of different numbers and configurations of bearing elements and housing members to be accomodated.
- two bearing assemblies are used together in an opposed configuration, to accomodate axial thrust in longitudinally opposed directions of the shaft.
- bearing lubrication means is provided utilising a suitable lubricant such as water, oil or the like, which lubrication is preferably hydrodynamic.
- Figure 1 is a sectional view of a bearing housing and bearing element according to the invention
- Figure 2 is a schematic representation of the housing and bearing element of Figure 1.
- Figure 3 is a plan view of a bearing assembly according to the invention.
- Figure 4 is a scrap section, along Z-Z, through the bearing assembly of Figure 3 when the assembly is fitted to a shaft.
- a bearing sub-assembly generally designated 1, comprises a housing 2, having an internal cav; -y 3 within which is mounted a bearing 4.
- the bearing 4 has a planar bearing surface 5, which projects above the level of the housing 2, and in use makes a bearing contact surface with a thrust collar 6.
- a clearance gap exists between the sides of the bearing 4 and the walls of the cavity 3, which facilitates a lateral tilting movement of the bearing 4 within the housing.
- Rotation of the bearing 4 within the housing 2 is inhibited by the complementary shape of the cavity 3 and adjacent side walls 4a of the bearing 4.
- the bearing 4 is also movable relative to the housing so as to allow the distance of projection of the bearing surface 5 above the housing 2 to be varied.
- the lateral tilting movement of the bearing 4, and variation of projection of the bearing surface 5, provide a self aligning-mechanism for the bearing 4 with the thrust collar 6, controlled by biasing disc springs 8 which are positioned in the cavity 3 in abutment with the base of the bearing 4 and an adjacent fixing plate 9.
- biasing disc springs 8 which are positioned in the cavity 3 in abutment with the base of the bearing 4 and an adjacent fixing plate 9.
- the disc springs 8 not only serve to bias the bearing surface 5 into bearing contact with the thrust collar 6, but also to transmit the axial thrust forces from the shaft 11 through the housing 2 to the carrier ring 7.
- Two threaded fixing bolts 10 are located through the housing 2 on opposed sides of the bearing 4, for mating engagement with complementary bored and threaded holes provided in the carrier ring 7.
- the bearing assembly comprises three bearing sub-assemblies bolted around a cirumfrential bearing axis 12 to a carrier ring 7.
- the thrust collar comprises two components 6a and 6b, with the retaining collar 6a having an interference fit with the shaft 11, and the inner collar 6b, the retaining collar 6a, and the inner collar 6b therefore both rotate as one with the shaft 11.
- the inner collar 6b has an annular planar surface 13 which makes bearing contact with the bearing surface 5 of each bearing 4.
- the carrier ring 7 is fixed to an external structure 14, to which the axial thrust forces acting on the shaft are transferred as described above.
- the bearing assembly has been described in an embodiment having three bearing sub-assemblies, but a bearing configuration could be utilised using various numbers and arrangements of sub-assemblies mounted in a carrier ring provided with a suitable arrangement of threaded holes for receiving the fixing bolts. This enables a bearing designer to "build up” a bearing suited to particular requirements from “off the shelf” standard bearing components.
- the exact number of sub-assemblies is determined by the axial thrust being divided by the load-carrying capacity of each sub-assembly.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB898923164A GB8923164D0 (en) | 1989-10-13 | 1989-10-13 | Thrust bearing assembly |
GB8923164.1 | 1989-10-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1991005961A2 true WO1991005961A2 (en) | 1991-05-02 |
WO1991005961A3 WO1991005961A3 (en) | 1991-06-13 |
Family
ID=10664574
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1990/001635 WO1991005961A2 (en) | 1989-10-13 | 1990-10-15 | Thrust bearing assembly |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB8923164D0 (en) |
WO (1) | WO1991005961A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0586861A1 (en) * | 1992-09-05 | 1994-03-16 | Asea Brown Boveri Ag | Combined thrust and support bearing for hydroelectric machine with vertical axis |
US5380212A (en) * | 1992-08-14 | 1995-01-10 | Hewlett Packard Company | Conductive elastomeric interface for a pin grid array |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH304117A (en) * | 1952-11-12 | 1954-12-31 | Culaud Et Ateliers Des C Andre | Thrust bearing. |
US3129417A (en) * | 1962-11-13 | 1964-04-14 | Waukesha Bearings Corp | Indicator systems for use in thrust bearings having resonance changer pistons |
CH415185A (en) * | 1964-09-30 | 1966-06-15 | Bbc Brown Boveri & Cie | Segment support bearing |
US3921286A (en) * | 1974-05-16 | 1975-11-25 | Mts System Corp | Pressure balanced hydrostatic slip bearing used in a guide and restraint system |
FR2334003A1 (en) * | 1975-12-02 | 1977-07-01 | Escher Wyss Sa | BEARING MOUNTED MOVABLE PARTS SUPPORT DEVICE |
DE2805796A1 (en) * | 1978-02-11 | 1979-08-16 | Glyco Metall Werke | Thrust bearing with replaceable pads - bolted to both parts of coupling and located by bearing ring |
GB2014251A (en) * | 1978-02-10 | 1979-08-22 | Polysius Ag | Hydrostatic bearing |
EP0283981A2 (en) * | 1987-03-25 | 1988-09-28 | Eastman Christensen Company | Direct bit drive for a deep-drilling tool |
-
1989
- 1989-10-13 GB GB898923164A patent/GB8923164D0/en active Pending
-
1990
- 1990-10-15 WO PCT/GB1990/001635 patent/WO1991005961A2/en active Application Filing
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH304117A (en) * | 1952-11-12 | 1954-12-31 | Culaud Et Ateliers Des C Andre | Thrust bearing. |
US3129417A (en) * | 1962-11-13 | 1964-04-14 | Waukesha Bearings Corp | Indicator systems for use in thrust bearings having resonance changer pistons |
CH415185A (en) * | 1964-09-30 | 1966-06-15 | Bbc Brown Boveri & Cie | Segment support bearing |
US3921286A (en) * | 1974-05-16 | 1975-11-25 | Mts System Corp | Pressure balanced hydrostatic slip bearing used in a guide and restraint system |
FR2334003A1 (en) * | 1975-12-02 | 1977-07-01 | Escher Wyss Sa | BEARING MOUNTED MOVABLE PARTS SUPPORT DEVICE |
GB2014251A (en) * | 1978-02-10 | 1979-08-22 | Polysius Ag | Hydrostatic bearing |
DE2805796A1 (en) * | 1978-02-11 | 1979-08-16 | Glyco Metall Werke | Thrust bearing with replaceable pads - bolted to both parts of coupling and located by bearing ring |
EP0283981A2 (en) * | 1987-03-25 | 1988-09-28 | Eastman Christensen Company | Direct bit drive for a deep-drilling tool |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5380212A (en) * | 1992-08-14 | 1995-01-10 | Hewlett Packard Company | Conductive elastomeric interface for a pin grid array |
EP0586861A1 (en) * | 1992-09-05 | 1994-03-16 | Asea Brown Boveri Ag | Combined thrust and support bearing for hydroelectric machine with vertical axis |
Also Published As
Publication number | Publication date |
---|---|
WO1991005961A3 (en) | 1991-06-13 |
GB8923164D0 (en) | 1989-11-29 |
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