US3413048A - Self-lubricating abutment - Google Patents

Self-lubricating abutment Download PDF

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Publication number
US3413048A
US3413048A US568010A US56801066A US3413048A US 3413048 A US3413048 A US 3413048A US 568010 A US568010 A US 568010A US 56801066 A US56801066 A US 56801066A US 3413048 A US3413048 A US 3413048A
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United States
Prior art keywords
abutment
lubricating
self
shaft
shoulder
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Expired - Lifetime
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US568010A
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Eudier Michel
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LA METALLURGIE FRANCAISE DES POUDRES-METAFRAM
METALLURGIE FRANCAISE
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METALLURGIE FRANCAISE
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    • 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
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
    • F16C33/1075—Wedges, e.g. ramps or lobes, for generating pressure
    • 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
    • F16C17/047—Sliding-contact bearings for exclusively rotary movement for axial load only with fixed wedges to generate hydrodynamic pressure
    • 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
    • F16C17/08—Sliding-contact bearings for exclusively rotary movement for axial load only for supporting the end face of a shaft or other member, e.g. footstep 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
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing

Definitions

  • a self-lubricating abutment on a shaft has a porous sintered metal base having undulations passing through the axis of rotation and a layer of sintered microporous metal having a porosity below 1.3 microns covering the entire surface of the undulations.
  • the invention relates to a self-lubricating abutment for a shaft comprising a bearing surface perpendicular to the shaft axis and rotating in contact with the abutment.
  • a self-lubricating metal made by sintering is a porous metal whose pores are generally filled with very pure mineral oil.
  • Bearings made with a self-lubricating metal of this type are used in order to avoid periodic lubrication.
  • these bearings often operate unsatisfactorily when the shaft is subjected to an axial load, i.e. thrust parallel to its axis, even if there is a collar to form an abutment on which a shoulder rigidly connected to the shaft bears. This is because there is no film of oil between the collar and the shoulder on the shaft.
  • the self-lubricating abutment according to the invention overcomes this disadvantage and is characterised in that it comprises facets forming undulations in which the directions of the edges of the highest and lowest parts of the undulation pass through the axis of the abutment.
  • FIGURE 1 is a perspective view of an abutment constructed according to the invention, the shaft and its shoulder being shown with dot-dash lines;
  • FIGURE 2 is a plan view of the abutment shown in FIGURE 1, with a supplementary ring around it;
  • FIGURE 3 is a section on a larger scale on a line III III in FIGURE 2.
  • the abutment shown in the drawings consists of a collar 1 resting on a support 2 with a rotary shaft 3 passing through it and along its axis.
  • the shaft is rigidly connected with a shoulder 4 bearing on the abutment collar 1.
  • the surface of the abutment in contact with the shoulder 4 has radial undulations.
  • the highest and lowest edges of the undulations pass through the axis of the abutment.
  • the highest parts 5 take the load of the shoulder 4.
  • the abutment which has just been described may be fitted with a ring 8 (FIGURE 2) surrounding it and having a height h (FIGURE 1).
  • This ring 8 prevents loss of oil because of centrifugal force.
  • the height h is shown in FIGURE 1, the ring itself is omitted from the figure for the sake of clarity.
  • the abutment may be improved by providing the whole of the surface facing the shoulder 4 with a metal layer 9 having very small pores which are less than 1.3 (1.3 microns) in diameter and prevent air from passing because of the capillary forces of the metal.
  • the oil film is then maintained completely without any loss of oil, and multiplication of the load by the speed always gives a value greater than 1,000.
  • the plane facets 6 could be replaced by facets shaped like a frusto-conica1 portion.
  • the undulations could be continuous, without any plane portion such as parts 5, 7, though the plane parts 5 have the advantage of bearing a greater load, particularly when the shaft is not moving.
  • a self-lubricating abutment for a shaft comprising a shaft, a porous sintered metal abutment, a bearing surface on and perpendicular to the axis of said shaft and rotating in contact with said abutment, facets on said abutment, undulations formed by said facets, the directions of the edges of the highest and lowest parts of said undulations passing through the axis of rotation of said abutment and a layer of sintered microporous metal having a porosity below 1.3/L microns covering the entire surface of said undulations.

Description

Nov. 26, 1968 I M. EUDIER 3,413,048
SELF-LUBRICATING ABUTMENT Filed July 26. 1966 United States Patent 27,22 1 Claim. c1. 308-160) ABSTRACT OF THE DISCLOSURE A self-lubricating abutment on a shaft has a porous sintered metal base having undulations passing through the axis of rotation and a layer of sintered microporous metal having a porosity below 1.3 microns covering the entire surface of the undulations.
The invention relates to a self-lubricating abutment for a shaft comprising a bearing surface perpendicular to the shaft axis and rotating in contact with the abutment.
It is well known that a self-lubricating metal made by sintering is a porous metal whose pores are generally filled with very pure mineral oil. Bearings made with a self-lubricating metal of this type are used in order to avoid periodic lubrication. However, these bearings often operate unsatisfactorily when the shaft is subjected to an axial load, i.e. thrust parallel to its axis, even if there is a collar to form an abutment on which a shoulder rigidly connected to the shaft bears. This is because there is no film of oil between the collar and the shoulder on the shaft.
The self-lubricating abutment according to the invention overcomes this disadvantage and is characterised in that it comprises facets forming undulations in which the directions of the edges of the highest and lowest parts of the undulation pass through the axis of the abutment.
The shoulder on the shaft therefore rests on an undulating self-lubricating surface, and experience has shown that such an abutment has a much longer life than conventional abutments.
FIGURE 1 is a perspective view of an abutment constructed according to the invention, the shaft and its shoulder being shown with dot-dash lines;
FIGURE 2 is a plan view of the abutment shown in FIGURE 1, with a supplementary ring around it; and
FIGURE 3 is a section on a larger scale on a line III III in FIGURE 2.
The abutment shown in the drawings consists of a collar 1 resting on a support 2 with a rotary shaft 3 passing through it and along its axis. The shaft is rigidly connected with a shoulder 4 bearing on the abutment collar 1.
According to the invention the surface of the abutment in contact with the shoulder 4 has radial undulations. The highest and lowest edges of the undulations pass through the axis of the abutment. The highest parts 5 take the load of the shoulder 4. On each side of these parts 5 there are facets 6, which are plane in the embodiment shown.
Rotation of the shoulder 4 relative to the abutment 1 causes oil to be sucked across some of the facets 6, viz.
3,413,048 Patented Nov. 26, 1968 the facets falling away from the shoulder 4 in the direction of rotation of this shoulder. The other facets, which rise towards the shoulder in the direction of rotation, cause an increase in pressure in the oil film, supporting the shoulder.
The abutment which has just been described may be fitted with a ring 8 (FIGURE 2) surrounding it and having a height h (FIGURE 1). This ring 8 prevents loss of oil because of centrifugal force. Although the height h is shown in FIGURE 1, the ring itself is omitted from the figure for the sake of clarity.
In these conditions the product of the initial load supported by the shaft in newtons/cm? multiplied by the speed in metres per second reaches the value of without any difficulty.
The abutment may be improved by providing the whole of the surface facing the shoulder 4 with a metal layer 9 having very small pores which are less than 1.3 (1.3 microns) in diameter and prevent air from passing because of the capillary forces of the metal. The oil film is then maintained completely without any loss of oil, and multiplication of the load by the speed always gives a value greater than 1,000.
Obviously, the invention is not restricted by the details of the embodiment just described. These details could be modified Without exceeding the scope of the invention, and the embodiment described has only been given by way of example.
For example, the plane facets 6 could be replaced by facets shaped like a frusto-conica1 portion. Also, the undulations could be continuous, without any plane portion such as parts 5, 7, though the plane parts 5 have the advantage of bearing a greater load, particularly when the shaft is not moving.
I claim:
1. A self-lubricating abutment for a shaft comprising a shaft, a porous sintered metal abutment, a bearing surface on and perpendicular to the axis of said shaft and rotating in contact with said abutment, facets on said abutment, undulations formed by said facets, the directions of the edges of the highest and lowest parts of said undulations passing through the axis of rotation of said abutment and a layer of sintered microporous metal having a porosity below 1.3/L microns covering the entire surface of said undulations.
References Cited UNITED STATES PATENTS 1,236,511 8/1917 Waring 308 2,615,766 10/1952 Wallace. 2,899,243 8/ 1959 Acterman.
FOREIGN PATENTS 770,060 3/1957 Great Britain.
OTHER REFERENCES Design of Powdered Metal Parts by W. H. Arata, published in Product Eegineering, August 1944, pp. 561 thru 564 relied upon.
MARTIN P. SCHWADRON, Primary Examiner. FRANK SUSKO, Assistant Examiner.
US568010A 1965-08-04 1966-07-26 Self-lubricating abutment Expired - Lifetime US3413048A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR27227A FR1452868A (en) 1965-08-04 1965-08-04 Self-lubricating stop

Publications (1)

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US3413048A true US3413048A (en) 1968-11-26

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US568010A Expired - Lifetime US3413048A (en) 1965-08-04 1966-07-26 Self-lubricating abutment

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US (1) US3413048A (en)
DE (1) DE1575548B1 (en)
ES (1) ES329423A1 (en)
FR (1) FR1452868A (en)
GB (1) GB1133874A (en)
NL (1) NL6610914A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0082375A2 (en) * 1981-12-21 1983-06-29 Siemens Aktiengesellschaft Geared motor, in particular an electromotive window-lifting drive
EP0055780B1 (en) * 1980-07-10 1985-01-09 Mitsubishi Denki Kabushiki Kaisha Flywheel apparatus for storing electrical energy
EP1164302A2 (en) * 2000-06-16 2001-12-19 Grundfos A/S Sliding thrust bearing for a wet running rotary pump
US20140314353A1 (en) * 2011-12-21 2014-10-23 Geraete- Und Pumpenbau Gmbh Dr. Eugen Schmidt Axial sliding bearing
US20190093709A1 (en) * 2017-09-26 2019-03-28 Hamilton Sundstrand Corporation Self lubricating metallic splined coupling for high speed aerospace pumps
US11047420B2 (en) * 2017-07-19 2021-06-29 Konzelmann Gmbh Hydrodynamic bearing
US11168736B2 (en) 2017-11-30 2021-11-09 Taiho Kogyo Co., Ltd. Thrust washer

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60106699A (en) * 1983-11-11 1985-06-12 Aida Eng Ltd Slide guide for press machine
JPS63158316A (en) * 1986-12-19 1988-07-01 Daido Metal Kogyo Kk Thrust bearing
US4777838A (en) * 1987-09-02 1988-10-18 Sundstrand Corporation System for lubricating gear end faces

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1236511A (en) * 1913-05-26 1917-08-14 Crocker Wheeler Co Bearing-surface for machinery.
US2615766A (en) * 1950-04-08 1952-10-28 Gen Motors Corp Bearing surface
GB770060A (en) * 1954-08-18 1957-03-13 Glacier Metal Co Ltd Composite bearings and bearing materials and methods of making them
US2899243A (en) * 1959-08-11 Autolubricated gas thrust bearing

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE500506C (en) * 1930-06-21 Karl Roeder Dr Ing Pressure bearing for steam turbine systems
DE897778C (en) * 1942-08-09 1953-11-23 Hanns Dipl-Ing Voglgsang Porous, oil-containing lager

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899243A (en) * 1959-08-11 Autolubricated gas thrust bearing
US1236511A (en) * 1913-05-26 1917-08-14 Crocker Wheeler Co Bearing-surface for machinery.
US2615766A (en) * 1950-04-08 1952-10-28 Gen Motors Corp Bearing surface
GB770060A (en) * 1954-08-18 1957-03-13 Glacier Metal Co Ltd Composite bearings and bearing materials and methods of making them

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0055780B1 (en) * 1980-07-10 1985-01-09 Mitsubishi Denki Kabushiki Kaisha Flywheel apparatus for storing electrical energy
EP0082375A2 (en) * 1981-12-21 1983-06-29 Siemens Aktiengesellschaft Geared motor, in particular an electromotive window-lifting drive
EP0082375A3 (en) * 1981-12-21 1984-07-18 Siemens Aktiengesellschaft Geared motor, in particular an electromotive window-lifting drive
EP1164302A2 (en) * 2000-06-16 2001-12-19 Grundfos A/S Sliding thrust bearing for a wet running rotary pump
EP1164302A3 (en) * 2000-06-16 2004-02-04 Grundfos A/S Sliding thrust bearing for a wet running rotary pump
US20140314353A1 (en) * 2011-12-21 2014-10-23 Geraete- Und Pumpenbau Gmbh Dr. Eugen Schmidt Axial sliding bearing
US9188157B2 (en) * 2011-12-21 2015-11-17 Nidec Gpm Gmbh Axial sliding bearing
US11047420B2 (en) * 2017-07-19 2021-06-29 Konzelmann Gmbh Hydrodynamic bearing
US20190093709A1 (en) * 2017-09-26 2019-03-28 Hamilton Sundstrand Corporation Self lubricating metallic splined coupling for high speed aerospace pumps
US11168736B2 (en) 2017-11-30 2021-11-09 Taiho Kogyo Co., Ltd. Thrust washer

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Publication number Publication date
GB1133874A (en) 1968-11-20
DE1575548B1 (en) 1970-07-09
NL6610914A (en) 1967-02-06
ES329423A1 (en) 1967-05-16
FR1452868A (en) 1966-04-15

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