WO2023072331A1 - Palier à roulement isolé électriquement - Google Patents

Palier à roulement isolé électriquement Download PDF

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Publication number
WO2023072331A1
WO2023072331A1 PCT/DE2022/100760 DE2022100760W WO2023072331A1 WO 2023072331 A1 WO2023072331 A1 WO 2023072331A1 DE 2022100760 W DE2022100760 W DE 2022100760W WO 2023072331 A1 WO2023072331 A1 WO 2023072331A1
Authority
WO
WIPO (PCT)
Prior art keywords
inner ring
outer ring
thickness
rolling element
diameter
Prior art date
Application number
PCT/DE2022/100760
Other languages
German (de)
English (en)
Inventor
Byunghoon HA
Jeongho DO
Wonhwan KANG
Original Assignee
Schaeffler Technologies AG & Co. KG
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 Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2023072331A1 publication Critical patent/WO2023072331A1/fr

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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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F16C19/525—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to temperature and heat, e.g. insulation
    • 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
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • 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
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • 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
    • F16C2202/00—Solid materials defined by their properties
    • F16C2202/30—Electric properties; Magnetic properties
    • 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
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/02—Plastics; Synthetic resins, e.g. rubbers comprising fillers, fibres
    • F16C2208/04—Glass fibres
    • 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
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/80—Thermosetting resins
    • F16C2208/82—Composites, i.e. fibre reinforced thermosetting resins
    • 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
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/80—Thermosetting resins
    • F16C2208/86—Epoxy resins
    • 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
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/80—Thermosetting resins
    • F16C2208/90—Phenolic resin
    • 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
    • F16C2223/00—Surface treatments; Hardening; Coating
    • F16C2223/30—Coating surfaces
    • F16C2223/32—Coating surfaces by attaching pre-existing layers, e.g. resin sheets or foils by adhesion to a substrate; Laminating
    • 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
    • F16C2223/00—Surface treatments; Hardening; Coating
    • F16C2223/30—Coating surfaces
    • F16C2223/42—Coating surfaces by spraying the coating material, e.g. plasma spraying
    • 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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/60—Thickness, e.g. thickness of coatings
    • 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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/70—Diameters; Radii
    • 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
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators

Definitions

  • the present invention relates to a rolling bearing, and more particularly to an electrically insulated rolling bearing which is easy to manufacture and suppresses creep.
  • FIG. 1 is a sectional view of a rolling bearing (1), the rolling bearing (1) including an outer ring (2), an inner ring (4) and a plurality of rolling elements (6) arranged to be arranged along the circumferential direction between the inner ring (4) and the outer ring (3) are arranged.
  • item 5 illustrates a cage fitted between the inner ring (4) and the outer ring (3) for maintaining the clearance of the rolling element (6) in the circumferential direction
  • item 2 illustrates the central axis of the rolling bearing (1).
  • FIG. 1 shows a ball bearing which has a ball as the rolling body (6), but there are also different types of rolling bearings which can have a needle roller or a cylindrical roller as the rolling body.
  • bearings are currently used for electrical applications (e.g. motors), malfunctions can easily occur due to electrical causes, so attempts are made to stop the current flow to the bearing (electrical insulation) or to make the current flow faster permit.
  • FIG.1 illustrates the electrically insulated rolling bearing in a current conduction preventing form, wherein, as illustrated in FIG.1, an electrically insulating film (8) is coated on an outer peripheral surface (7) of the outer ring (3).
  • the electrical insulating film (8) is prefabricated from a synthetic resin strip with a high electrical resistance and adheres to the peripheral surface (7) of the outer ring (3) or is connected to it by sintering.
  • a slope is formed on both end faces (9, 10) of the outer ring (3) to form a step (11) which assists in fixing the electrical insulating film (8).
  • the electrical insulation sheet is attached as described above, there have been problems of damage to the electrical insulation sheet (8) because between the housing in which a bearing is fitted, and the electrical insulating film (8) and creep occurs between the axle and the electrical insulating film.
  • Patent Literature 0001 Republic of Korea, Laid-Open No. 10-2012-0104983, Patent Application
  • the present invention has been proposed to solve the problems encountered in the prior art and aims to provide an electrically insulated bearing that is easy to manufacture and suppresses creep effects.
  • the present invention provides an electrically insulated rolling bearing comprising an outer ring having an outer ring raceway formed on an inner diameter surface, an inner ring having an inner ring raceway formed on an outer diameter surface, and a plurality of rolling elements arranged along the circumferential direction between the outer ring raceway and the inner ring raceway, the inner ring being provided with an electrical insulation sheet covering the inner diameter surface.
  • the electrical insulation sheet includes an extension covering the width direction of the inner ring on both sides.
  • the rolling element is a sphere and the thickness of the inner ring is between 33% and 70% of the diameter of the rolling element.
  • the rolling element is a sphere and the thickness of the inner ring is between 35% and 70% of the diameter of the rolling element.
  • the rolling element is a sphere and the thickness of the inner ring is between 50% and 70% of the diameter of the rolling element amounts to.
  • the present invention is an electrically insulated rolling bearing comprising the outer ring having the outer ring raceway formed on the inner diameter surface, the inner ring having the inner ring raceway formed on the outer diameter surface, and a plurality of rolling elements arranged in Circumferentially arranged between the outer ring raceway and the inner ring raceway includes, wherein the outer ring is equipped with the electrical insulation film covering the surface of the outer diameter.
  • the electrical insulation sheet includes an extension covering both sides in the width direction of the outer ring.
  • the thickness of the outer ring is greater than that of the inner ring.
  • the rolling element is a sphere and the thickness of the outer ring is between 33% and 70% of the diameter of the rolling element.
  • the rolling element is a sphere and the thickness of the outer ring is between 35% and 70% of the diameter of the rolling element.
  • the rolling element is a sphere and the thickness of the inner ring is between 50% and 70% of the diameter of the rolling element.
  • the electrically insulated rolling bearing in the present invention According to the electrically insulated rolling bearing in the present invention, circulating current is effectively cut off, creep is suppressed, and the electrically insulating film is prevented from being peeled off or damaged due to creep, and the electrically insulating film functions as a buffer.
  • FIG.1 is a cross-sectional view showing a conventional electrically insulated rolling bearing.
  • FIG.2 is a cross-sectional view of an electrically insulated rolling bearing according to the present invention, corresponding to section "A" in FIG.1,
  • FIG.3 is a cross-sectional view of a modified embodiment of the electrically insulated rolling bearing according to the present invention corresponding to the "A" section of FIG.1.
  • FIG.2 is a cross-sectional view of the electrically insulated rolling bearing according to the present invention corresponding to section "A" of FIG.1
  • FIG.3 is a cross-sectional view of a modified example of the electrically insulated rolling bearing according to the present invention corresponding to section "A" of FIG .1.
  • the vertical direction of FIG.2 and FIG.3 is a radial direction, and the horizontal direction is an axial or widthwise direction.
  • the electrically insulated rolling bearing according to the present invention may include an outer race (110), an inner race (120) and a rolling element (130).
  • an outer ring raceway (111) is formed on the inner diameter surface.
  • an inner ring raceway (121) is formed on the outer diameter surface.
  • the inner ring (120) is placed inside the outer ring (110).
  • the rolling element (130) is provided with a plurality of rolling elements arranged along the circumferential direction between the outer ring raceway (111) and the inner ring raceway (121).
  • the outer ring (110), the inner ring (120) and the rolling element (130) are made of steel similar to a rolling bearing.
  • a cage (150) in the form of a ring is further mounted between the inner ring (120) and the outer ring (110), and the cage (150) acts to circumferentially maintain the spacing of the plurality of rolling elements (130).
  • the electrically insulated rolling bearing (100) can further include an electrically insulating film (140).
  • the electrical insulation foil is designed to cover the inner diameter surface of the inner ring (120).
  • the electrical insulation sheet (140) is placed between the inner race (120) and the axle.
  • the electrical insulation sheet (140) is designed to attach to the inner diameter surface of the inner ring (120) in the form of a cylinder.
  • the electrical insulation sheet (140) is made of high electrical resistance synthetic resin and acts as an insulator between the axle and the inner ring (120).
  • the thickness of the electrical insulation sheet (140) is designed to be in a range of 1 to 3 mm based on the size of the bearings.
  • the thickness of the electrical insulation film (140) is preferably greater than 1 mm.
  • the thickness (t1) of the inner ring (120) according to the present Invention is equipped with the electrical insulating film (140), larger than that of the outer ring (110) in the electrically insulated rolling bearing (100).
  • the bearing life and load carrying capacity are closely related to the size (diameter) of the rolling element and the total number of rolling elements.
  • Increasing the thickness (t1) of the inner ring (120) equipped with the electrical insulation film is advantageous in order to prevent the electrical insulation film (140) from being damaged by creeping and detachment of the electrical insulation film (140).
  • the thickness (t1) of the inner ring (120) in the mounting space of the axle and the housing should be smaller or the thickness of the outer ring (110) should be smaller. If the diameter of the rolling element (130) is reduced, it will affect the load carrying capacity or the life of the bearing. Therefore, in an electrically insulated rolling bearing (100) according to the present invention, the thickness (t1) of the inner ring (120) provided with the electrically insulating film can be made larger than that of the outer ring (110), thereby enabling a Prevent, slow down or suppress electrical insulation film (140) damage or electrical insulation film (140) delamination due to creep effects while minimizing the impact on bearing life or load carrying capacity.
  • the electric insulating sheet includes the extension (141) covering both widthwise sides of the inner ring (120).
  • the electrical insulation sheet (140) is provided with the extension (141) covering both width surfaces of the inner ring (120), and as shown in FIG. 2, the width of the inner ring (120) may be made smaller than the width of the outer ring (110).
  • the electrical insulating sheet (140) is provided with an extension (141) covering both width faces of the inner ring (120) and when the inner ring (120) is mounted on the axle (not shown) or operated after mounting, the extensions will dampen (141) on both sides the impact and prevent the electrical insulation film (140) from being detached. And since there is a pre-compression when assembling, the elastic modulus of the extension (141) of the electrical insulating sheet (140) is smaller than that of the inner ring (110), the assembling range is wide enough for simplified assembling.
  • the electrical insulating film (140) preferably consists of a duroplastic resin.
  • the electrical insulation sheet (140) can be formed by attaching or spraying on the outer diameter side of the outer ring (110) or the inner diameter side of the inner ring (120).
  • thermosetting synthetic resins include epoxy resin or formaldehyde resin, phenol-formaldehyde resin or melamine-formaldehyde resin.
  • Thermosetting synthetic resins preferably contain glass fibers or carbon fibers as a reinforcing material.
  • the electrical insulation film (140) can be attached by a simple method such as spraying. by using thermosetting synthetic resins instead of ceramics for insulation, and the adjustment of the roundness of the outer ring (110) and the inner ring (120) is easily possible by mechanical working.
  • the rolling element (130) is a sphere in the above illustration, and it is advantageous to increase the thickness (t1) of the inner ring (120) so that the thickness of the inner ring (120) is within a range of 33% to 70% of the diameter of the rolling element (130). Since the weight of the inner ring (120) and the mass inertia increase with increasing thickness (t1) of the inner ring (120), this minimizes the occurrence of creep effects of the electrical insulating film (140) and detachment of the electrical insulating film (140). suppressed or prevented. In FIG.2 it can be seen that item t3 represents the thickness (t1) of the inner ring (120) plus the thickness (t2) of the electrical insulating film (140).
  • the rolling element (130) is a sphere, and preferably the thickness (t1) of the inner ring (120) is increased so that the thickness of the inner ring (120) is within a range of 35% to 70% of the diameter of the rolling element (130). It is even more advantageous if the thickness (t1) of the inner ring (120) is increased such that the thickness of the inner ring (120) is between 50% and 70% of the diameter of the rolling element (130).
  • the thickness of the inner ring (120) is less than 33% of the diameter of the rolling element (130), the effects of an increased thickness of the inner ring (120) remain absent, and the creeping of the electrical insulating film (140) will not occur not suppressed.
  • the thickness of the inner ring (120) is greater than 33% of the diameter of the rolling element (130) and less than 35%, a thickness of the inner ring (120) of more than 35% of the diameter of the Rolling element (130), the creep occurring with the electrical insulating film is significantly reduced, and if greater than 50%, hardly any creeping of the electrical insulating film is detected.
  • the load capacity and life of the bearing may decrease significantly due to the reduction in the diameter of the rolling element (130) and/or the thickness of the outer ring (110). reduce.
  • the electrically insulating sheet is formed in a shape covering the outer diameter surface of the outer ring (11).
  • the electrical insulation foil (140) is located between the outer ring (110) and the housing.
  • the electrical insulation sheet (140) is attached so that it is applied to the outer diameter surface of the outer ring (110) in the shape of a cylinder.
  • the electrical insulation foil (140) acts as an insulator between the housing and the outer ring (110).
  • the thickness (t4) of the outer ring (110) equipping the electrically insulating sheet (140) is greater than the thickness of the inner ring (120) in the electrically insulated rolling bearing (100) in the design of the bearings Bearing life and bearing load capacity are closely related to the size (diameter) of the rolling element and the total number of rolling elements.
  • An increase in the thickness (t4) of the outer ring (110) provided with the electrical insulation film (140) is advantageous in order to prevent the electrical insulation film from being damaged and detached by creep effects.
  • the diameter of the rolling element (130) should be smaller or the thickness of the inner ring (120) should be smaller.
  • the thickness (t4) of the inner ring (120) equipped with an electrically insulating sheet can be made larger than that of the outer ring (110), It is possible to prevent, slow down or suppress damage to the electrical insulation sheet (140) or peeling of the electrical insulation sheet (140) due to creep effects while minimizing the impact on bearing life or load capacity.
  • FIG. Figure 3 shows that drawing number t5 illustrates the thickness (t4) of the outer ring (110) plus the thickness (t2) of the electrical insulation foil (140).
  • the electric insulating sheet includes the extension (141) covering both sides in the width direction of the outer ring (110).
  • the electric insulating sheet (140) is provided with the extension (141) covering both width surfaces of the outer ring (110), and as shown in FIG. 3, the width of the outer ring (110) can be machined smaller than the width of the inner ring (120).
  • the electrical insulating film (140) is provided with an extension (141) covering both width surfaces of the outer ring (110), and when the outer ring (110) is assembled on the housing (not shown) or operated after assembly, the functional extensions dampen (141) absorb the impact on both sides and thus prevent the electrical insulation film (140) from being detached. And since there is a pre-compression when assembling, the elastic modulus of the extension (141) of the electrical insulating sheet (140) is smaller than that of the outer ring (110), the assembling range is wide enough for simplified assembling.
  • the rolling element (130) is a sphere, and preferably the thickness (t4) of the outer ring (110) is increased so that the thickness of the outer ring (110) is between 33% and 70% of the diameter of the rolling element (130).
  • the thickness (t4) of the outer ring (110) increases, since the weight of the outer ring (110) increases and the inertia increases, this can suppress the occurrence of the creep effect of the electrical insulation film (140) and detachment of the electrical insulation film (140). suppressed or prevented.
  • the rolling element (130) is a sphere and preferably the thickness (t4) of the outer ring (110) is increased such that the thickness of the outer ring (110) is between 35% and 70% of the diameter of the rolling element (130), and preferably the thickness (t4) of the inner ring (120) is increased so that the thickness of the outer ring (110) is between 50% and 70% of the diameter of the rolling element (130). If the thickness of the outer ring (110) is less than 33% of the diameter of the rolling element (130), the effects of the increased thickness of the outer ring (110) are absent and the creeping effect on the electrical insulating film (140) is not suppressed.
  • the thickness of the outer ring (110) is greater than 33% of the diameter of the rolling element (130) and less than 35%, with a thickness of the outer ring (110) of more than 35% of the diameter of the Rolling body (130), the creep effect occurring on the electrical insulation film, significantly reduced, and with a thickness of more than 50%, the creep effect on the electrical insulation film hardly occurs. If the thickness of the outer ring (110) is greater than 70% of the diameter of the rolling element (130), the load capacity and life of the bearing may be significantly reduced due to the reduction in the diameter of the rolling element (130) and/or the thickness of the inner ring (120). .

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

Abstract

La présente invention concerne un palier à roulement isolé électriquement (100) qui contient : une bague externe (110) sur laquelle un chemin de roulement (111) de bague externe est formé sur une surface circonférentielle externe ; une bague interne (120) sur laquelle un chemin de roulement (121) de bague interne est formé sur une surface circonférentielle externe ; et une pluralité d'éléments de roulement (130) agencés selon la direction circonférentielle entre le chemin de roulement (111) de bague externe et le chemin de roulement (121) de bague interne. La bague interne (120) est équipée d'un film d'isolation électrique (140) qui recouvre la surface circonférentielle interne.
PCT/DE2022/100760 2021-11-01 2022-10-17 Palier à roulement isolé électriquement WO2023072331A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020220097045A KR20230064539A (ko) 2021-11-01 2021-11-01 절연 구름 베어링
KR10-2022-0097045 2021-11-01

Publications (1)

Publication Number Publication Date
WO2023072331A1 true WO2023072331A1 (fr) 2023-05-04

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PCT/DE2022/100760 WO2023072331A1 (fr) 2021-11-01 2022-10-17 Palier à roulement isolé électriquement

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WO (1) WO2023072331A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040032054A (ko) * 2002-10-08 2004-04-14 엔티엔 가부시키가이샤 전기 부식 방지 구름 베어링
WO2007049727A1 (fr) * 2005-10-27 2007-05-03 Nsk Ltd. Palier a roulement isolant destine a prevenir une corrosion electrique, procede de fabrication correspondant, et dispositif a palier

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009056349A1 (de) 2009-11-30 2011-06-01 Schaeffler Technologies Gmbh & Co. Kg Wälzlager

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040032054A (ko) * 2002-10-08 2004-04-14 엔티엔 가부시키가이샤 전기 부식 방지 구름 베어링
WO2007049727A1 (fr) * 2005-10-27 2007-05-03 Nsk Ltd. Palier a roulement isolant destine a prevenir une corrosion electrique, procede de fabrication correspondant, et dispositif a palier

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