WO2009079974A2 - Palier comprenant un roulement radial avec un joint de séparation dans la bague extérieure - Google Patents

Palier comprenant un roulement radial avec un joint de séparation dans la bague extérieure Download PDF

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Publication number
WO2009079974A2
WO2009079974A2 PCT/DE2008/002023 DE2008002023W WO2009079974A2 WO 2009079974 A2 WO2009079974 A2 WO 2009079974A2 DE 2008002023 W DE2008002023 W DE 2008002023W WO 2009079974 A2 WO2009079974 A2 WO 2009079974A2
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
outer ring
radial
parting line
bearing according
Prior art date
Application number
PCT/DE2008/002023
Other languages
German (de)
English (en)
Other versions
WO2009079974A3 (fr
Inventor
Henri Van Der Knokke
Original Assignee
Schaeffler 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 Kg filed Critical Schaeffler Kg
Priority to EP08864878A priority Critical patent/EP2225476A2/fr
Priority to JP2010538325A priority patent/JP2011506882A/ja
Publication of WO2009079974A2 publication Critical patent/WO2009079974A2/fr
Publication of WO2009079974A3 publication Critical patent/WO2009079974A3/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
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
    • 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
    • F16C33/58—Raceways; Race rings
    • F16C33/64—Special methods of manufacture
    • 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
    • F16C2240/80—Pitch circle diameters [PCD]
    • F16C2240/82—Degree of filling, i.e. sum of diameters of rolling elements in relation to PCD
    • F16C2240/84—Degree of filling, i.e. sum of diameters of rolling elements in relation to PCD with full complement of balls or rollers, i.e. sum of clearances less than diameter of one rolling element

Definitions

  • Bearing point comprising a radial roller bearing with parting line in the outer ring
  • the invention relates to a bearing for supporting a rotating workpiece in a bearing receptacle comprising a radial roller bearing with an outer raceway having an inner ring, with an inner raceway having outer ring, and with a plurality of rolling elements which roll on the inner and outer raceway.
  • the invention further relates to a method for producing an outer ring of a radial roller bearing for a bearing point according to the invention.
  • An optimum operating condition of a roller bearing is present when the rolling elements roll on the raceways of the outer and inner rings, without causing the rolling elements to slide over one or both raceways.
  • the bearing prevailing in operation may Stress, so the force acting without external load between the inner and outer ring, not too big. The occurring during operation game in bearings (operating clearance) may not be too small.
  • radial roller bearings In the case of radial roller bearings, during operation a specific clearance in the radial direction must be present in order to avoid excessive radial bearing preload. In order to ensure this, radial roller bearings must already have a correspondingly large so-called radial bearing clearance (radial clearance) when not installed.
  • the radial clearance corresponds to the distance that the outer ring can move in the non-installed state relative to the inner ring from one end position to the opposite end position.
  • DIN 620-4 there are groups C2, CN, C3, C4 and C5 for the radial internal clearance and these are given in tables for the different radial rolling bearing types.
  • the group CN corresponds to the so-called normal air and is used in rolling bearings without any special requirements.
  • Groups C3 - C5 have a larger radial clearance compared to normal air.
  • the group C2 has a lower radial clearance than the normal air.
  • the selection of the radial clearance must take into account all factors which have an influence on the operating cycle.
  • the selection of the radial clearance occurs e.g. taking into account whether by a press fit of inner and / or outer ring a reduction of the radial clearance already after the installation of the bearing (bearing clearance) arises.
  • the selection of radial clearance is still largely determined by the temperature conditions prevailing during operation. During operation, heat is generated in the bearing due to the friction between the rolling elements and the raceways. As a rule, the cooling conditions on the inner ring are worse than on the outer ring, so that a temperature gradient arises from the inner to the outer ring. The resulting differential thermal expansion causes the resulting operating clearance is smaller than the bearing clearance. There is thus a risk that the bias in the camp too becomes large and the consequent increased surface pressure leads to premature bearing failure (hot running).
  • a radial air is often selected, especially in fast-rotating bearings, which is greater than the normal air (for example, radial clearance C3 to DIN 620-4).
  • the radial clearance must be chosen so large that the most unfavorable temperature conditions that are ever possible during operation are taken into account, since hot running in any case must be ruled out. This in turn has the consequence that the play of a radial rolling bearing in the radial direction during normal operation, so if the worst temperature conditions are not present, is greater than necessary.
  • an excessive play in the radial direction involves the risk that, in particular at low radial load, a (partial) sliding of the rolling elements over one or both tracks occurs (slip).
  • Slip occurs when the forces transmitted in the radial direction between inner and outer ring are not large enough to cause a sufficiently large frictional force between the rolling elements and the raceways, so that the rolling elements roll on the raceways.
  • the transmitted between inner and outer ring forces can be applied by an external load and / or by a bias of the bearing.
  • the invention has for its object to provide a bearing for supporting a rotating workpiece in a bearing receptacle comprising a radial rolling bearing, which excludes hot running of the radial roller bearing and thereby reduces the risk of slipping in a simple and cost-effective manner.
  • a bearing for supporting a rotating workpiece in a bearing receptacle comprising a radial roller bearing with an outer raceway having an inner ring, with an inner raceway having outer ring, and with a plurality of rolling elements which roll on the inner and outer raceway , in which
  • the outer ring has a parting line extending over its axial extent
  • the radial roller bearing has a radial Lagerervor- voltage when installed and
  • the bearing seat is designed such that the located in the bearing seat outer ring can expand when applying a radially outward acting force.
  • the object is further achieved by a method for producing an outer ring of a radial roller bearing for a bearing point according to the invention, comprising the following steps:
  • the invention is based on the finding that by the inventive bearing both a suppression of slippage and avoiding hot running is made possible by the radial rolling bearing always has a minimum biasing force on the one hand and on the other hand, the biasing force can not be increased in operation so far that a Hot running would occur.
  • the rolling bearing is designed taking into account the tolerances of the bearing and the rotating workpiece such that after installation results in a radial bearing preload.
  • the rolling bearing in the disassembled state quite a bearing clearance equal to or greater than the normal air according to DIN 620-4 have, as long as the installation in the bearing by pressing fits on the inner and / or outer ring results in a radial biasing force. Due to this biasing force no slip occurs even if no or only a very small radial load acts on the radial roller bearing from the outside.
  • the corresponding design of the bearing can be used e.g. be made by a clearance fit between the bearing seat and outer ring or by a soft radially in the radial bearing mount, which allows a certain deformation as soon as the outer ring is acted upon by a force acting in the radial outward direction.
  • Mass moment of inertia of the rolling elements and the cage (bearing set), the acceleration forces acting on the radial rolling bearing, and the mi- nimal occurring radial load depends. It is true that a larger mass moment of inertia of the bearing set, especially in conjunction with higher acceleration forces, requires a larger preload force. If, in each operating state, a certain minimum radial load can be expected from the outside, a reduction in the otherwise necessary preload force is possible on the other hand. In principle, the preload forces necessary for slip prevention need only be so great that sufficient frictional forces are generated between the rolling elements and the raceways.
  • An advantage of the bearing according to the invention is that it can be mounted in a very simple manner. This already existing standard assembly tools can be used. Furthermore, the manufacture of the radial roller bearing does not require any significant changes to existing production processes. Thus, the rolling elements or the inner ring are standard components. The parting line in the outer ring can be easily and inexpensively manufactured by a single step.
  • the bearing receptacle relative to the outer ring on a radial clearance fit.
  • This form of embodiment of the bearing support to allow expansion of the located in the bearing seat outer ring when applying a force acting in the radial direction represents a simple and very effective solution.
  • To expand the outer ring is - to the concern of the outer ring on the Inner lateral surface of the bearing support - no additional force to overcome the deformation of the bearing support to overcome.
  • the size of the radial clearance may be e.g. are in the same order of magnitude as the radial play in a loose bearing within a FestVLoslagerung combination.
  • the radial Rolling a split outer ring.
  • an outer ring can first be manufactured in a conventional manner and then separated. If the cutting is carried out as a last step, the effects on the outer ring production are the least.
  • the radial rolling bearing on a blasted outer ring Since the blasting of outside rings is already practiced, e.g. in cross roller bearings, the blasting of the axially extending parting line according to the invention can be easily integrated into the manufacturing process. The blasting does not result in any heating of the outer ring, so that this method can be carried out as a last working step without the risk of adversely affecting fits or raceways. It is also advantageous that no open gap is created by the blasting, as is the case, for example, with a cutting by wire erosion.
  • the longitudinal direction of the parting line runs essentially parallel to a rotation axis of the outer ring.
  • the length of the parting line thus substantially corresponds to the axial extent of the outer ring and thus has the shortest possible length.
  • the longitudinal direction of the parting line extends substantially at an angle to a rotational axis of the outer ring.
  • the rolling over of the parting line or the withdrawn raceway section takes place more gently in this case, since not the complete parting line is suddenly overrun.
  • the parting line extends at an angle of about 5 to 25 degrees to the rotating pocket of the outer ring. Much larger angles have the disadvantage that the stability of the outer ring is reduced.
  • the course of the parting line in the radial direction at an angle to the axis of rotation of the outer ring ie the parting line in the radial direction does not follow the shortest route through the outer ring.
  • the inner race of the outer ring in a region comprising the parting line withdrawn.
  • Such reductions in the area of a parting line are already carried out in the case of blown rings.
  • the return may comprise a larger area of the track around the parting line, in which the track diameter increases in the circumferential direction from both sides to the parting line.
  • the raceway diameter in the region of the parting line may be ground at least 5 microns larger over part of the circumference.
  • the radial rolling bearing is a radial roller bearing, in particular a cylindrical roller bearing, tapered roller bearing or spherical roller bearing, or a radial ball bearing, in particular a deep groove ball bearing or angular contact ball bearing.
  • the invention can be used in all bearings that have rolling bearings for transmitting radial forces. Due to the lower stiffness of their rolling elements, the radial clearance of radial roller bearings is usually greater than the radial clearance of radial ball bearings. Consequently, the risk of slippage in radial roller bearings is generally greater than the risk of slippage in radial ball bearings and an application of the present invention to radial roller bearings particularly useful.
  • the inventive method for producing an outer ring of a radial roller bearing which can be used in a bearing point according to the invention, comprises the steps - Formative production of a closed outer ring, and
  • the shaping production of the outer ring can include all the steps that also take place in the shaping production of a conventional outer ring.
  • the outer dimensions tolerances can already be made. This shaping production can therefore be identical to the shaping production of conventional outer rings.
  • the outer ring is hardened after the shaping production and before the separation. By curing a clean fracture surface or parting line is favored.
  • the outer ring is ground after curing. This gives the tracks their final surface.
  • the raceway diameter in the area of the parting line can be ground larger by at least 5 microns over part of the circumference.
  • the separation is carried out by a blasting of the outer ring. If the outer ring has been previously hardened, plastic deformation when applying the radial force for blasting is virtually eliminated.
  • the shaping manufacturing comprises the introduction of at least one notch in at least one of the end faces as a predetermined breaking point for the blasting.
  • the positioning of the parting line created by the blasting can be determined by the way in which the radial force is applied.
  • the parting line extend at an angle to the axis of rotation of the outer ring should, however, it is advantageous to specify the desired course (also) by a previously incorporated notch.
  • the bearing according to the invention can be used in particular in transmissions for wind turbines, calender bearings and cone crusher bearings.
  • Fig. 2 shows a blasted outer ring of a radial rolling bearing for a bearing according to the invention
  • Fig. 3 shows an embodiment of a bearing point according to the invention.
  • Fig. 1 shows a radial rolling bearing for a bearing according to the invention.
  • the radial roller bearing consists of an outer ring 1, an inner ring 2, and arranged between the outer ring 1 and the inner ring 2 rolling elements 3.
  • the radial roller bearing forms a cylindrical roller bearing, so that the rolling elements 3 consist of cylindrical rollers.
  • the outer ring 1 has a parting line 4 extending essentially in the axial direction of the outer ring. This is e.g. produced by wire erosion, so that already forms an open gap in the removed radial roller bearing.
  • Fig. 2 shows a blasted outer ring 1 of a radial rolling bearing for a inventive bearing.
  • the longitudinal direction of the parting line 4 extends in this case at an angle 5 relative to a rotation axis 6 of the rolling bearing.
  • Hg. 3 shows an embodiment of a bearing according to the invention.
  • the bearing includes a rolling bearing consisting of an outer ring 1, an inner ring 2, and arranged between the outer ring 1 and inner ring 2 rolling elements 3.
  • the outer ring has a parting line 4 and is at its outer diameter 7 by a clearance fit in the bearing of the storage bearing 8 fitted.
  • the inner ring 2 was pushed onto a shaft 9, in which case there is an interference fit.
  • the rolling elements 3 are guided by a cage, not shown.
  • the bearing according to the invention may also be designed to be full.

Landscapes

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

Abstract

L'invention concerne un palier pour monter une pièce rotative dans un logement de palier, comprenant un roulement radial avec : une bague intérieure présentant une piste de roulement extérieure; une bague extérieure présentant une piste de roulement intérieure; et une pluralité d'éléments roulants qui roulent sur la piste de roulement intérieure et sur la piste de roulement extérieure. L'invention concerne en outre un procédé de fabrication d'une bague extérieure d'un roulement radial pour un palier selon l'invention. L'invention vise à exclure un échauffement du roulement radial, et ce faisant à réduire d'une manière simple et économique le risque de glissement. A cet effet, selon l'invention : la bague extérieure présente un joint de séparation s'étendant sur son développement axial; le roulement radial présente, dans l'état installé, une précontrainte radiale; et le logement de palier est conçu de telle sorte que la bague extérieure qui se trouve dans le logement de palier peut s'élargir lors de l'exercice d'une force agissant vers l'extérieur en direction radiale.
PCT/DE2008/002023 2007-12-21 2008-12-04 Palier comprenant un roulement radial avec un joint de séparation dans la bague extérieure WO2009079974A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP08864878A EP2225476A2 (fr) 2007-12-21 2008-12-04 Palier comprenant un roulement radial avec un joint de séparation dans la bague extérieure
JP2010538325A JP2011506882A (ja) 2007-12-21 2008-12-04 外輪に離間部を有するラジアル転がり軸受を含む軸支部

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007062157.6 2007-12-21
DE200710062157 DE102007062157A1 (de) 2007-12-21 2007-12-21 Lagerstelle umfassend ein Radialwälzlager mit Trennfuge im Außenring

Publications (2)

Publication Number Publication Date
WO2009079974A2 true WO2009079974A2 (fr) 2009-07-02
WO2009079974A3 WO2009079974A3 (fr) 2009-12-30

Family

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Application Number Title Priority Date Filing Date
PCT/DE2008/002023 WO2009079974A2 (fr) 2007-12-21 2008-12-04 Palier comprenant un roulement radial avec un joint de séparation dans la bague extérieure

Country Status (4)

Country Link
EP (1) EP2225476A2 (fr)
JP (1) JP2011506882A (fr)
DE (1) DE102007062157A1 (fr)
WO (1) WO2009079974A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011122145A1 (de) * 2011-12-22 2013-06-27 Imo Holding Gmbh Wälzlageranordnung mit geneigt verlaufenden Härtezonen

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102434589B (zh) * 2011-09-01 2014-02-12 中国航空动力机械研究所 轴承

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20113008U1 (de) 2001-08-04 2001-11-29 Skf Ab Zwei- oder mehrreihiges Kegelrollenlager
DE202005007904U1 (de) 2005-05-18 2005-07-21 Starragheckert Gmbh Axial und radial belastbares Wälzlager, insbesondere Kegelrollenlager

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2207957A (en) * 1987-08-14 1989-02-15 Hiroshi Teramachi Cross roller bearing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20113008U1 (de) 2001-08-04 2001-11-29 Skf Ab Zwei- oder mehrreihiges Kegelrollenlager
DE202005007904U1 (de) 2005-05-18 2005-07-21 Starragheckert Gmbh Axial und radial belastbares Wälzlager, insbesondere Kegelrollenlager

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011122145A1 (de) * 2011-12-22 2013-06-27 Imo Holding Gmbh Wälzlageranordnung mit geneigt verlaufenden Härtezonen

Also Published As

Publication number Publication date
DE102007062157A1 (de) 2009-06-25
JP2011506882A (ja) 2011-03-03
WO2009079974A3 (fr) 2009-12-30
EP2225476A2 (fr) 2010-09-08

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