EP2984358A1 - Grand palier à roulement scellé à auto-alignement doté d'une étanchéité améliorée - Google Patents

Grand palier à roulement scellé à auto-alignement doté d'une étanchéité améliorée

Info

Publication number
EP2984358A1
EP2984358A1 EP14782694.5A EP14782694A EP2984358A1 EP 2984358 A1 EP2984358 A1 EP 2984358A1 EP 14782694 A EP14782694 A EP 14782694A EP 2984358 A1 EP2984358 A1 EP 2984358A1
Authority
EP
European Patent Office
Prior art keywords
ring
annular plate
mounting groove
periphery portion
rolling bearing
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Withdrawn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
EP14782694.5A
Other languages
German (de)
English (en)
Inventor
Andreas LÖFQVIST
Lars STIGSJÖÖ
Emmanuel Pichlmaier
Wolfgang Swete
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.)
SKF AB
Original Assignee
SKF AB
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 SKF AB filed Critical SKF AB
Publication of EP2984358A1 publication Critical patent/EP2984358A1/fr
Withdrawn legal-status Critical Current

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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3268—Mounting of sealing rings
    • F16J15/3276—Mounting of sealing rings with additional static sealing between the sealing, or its casing or support, and the surface on which it is mounted
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7806—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for spherical roller 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
    • F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race
    • F16C33/7856—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race with a single sealing lip
    • 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
    • F16C19/34—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 both radial and axial load
    • F16C19/38—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 both radial and axial load with two or more rows 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
    • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/06—Ball or roller bearings
    • F16C23/08—Ball or roller bearings self-adjusting
    • F16C23/082—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface
    • F16C23/086—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface forming a track for rolling elements

Definitions

  • the present invention relates to a large sealed self-aligning rolling bearing, and to a method for manufacturing a large sealed self-aligning rolling bearing, which bearing comprises an inner ring, an outer ring, rolling elements, and a built-in sealing member which is build-in into the inner or outer ring.
  • Bearings are often used in applications which require the use of a sealing.
  • the mounting of the bearing may take place in an environment which is dirty, or bearings may be subjected to dirt, metal chips, and other impurities, during operation in demanding applications, for example in applications such as continuous casting machines, rolling mills, etc.
  • the bearing By providing the bearing with a seal, impurities and dirty may be prevented from penetrating into the bearing thereby causing a reduction of the service life of the bearing and an increase of maintenance needs.
  • the performance of the seal is an important aspect for providing increased service life and more cost-effective operation and maintenance of bearings.
  • the seal is assembled on the bearing, as shown in e.g. SE-B-451 081.
  • the seal is formed by two cooperating sheet metal rings wherein at least one of the sheet metal rings is notch joined into the outer race ring, whereas the other is fitted to the inner race ring.
  • This solution however means that the seal will project outside the side planes, which in some cases necessitates modifications of the bearing housing and also of the mounting and dismantling tools, etcetera.
  • the seal is built-in into the bearing such that the seal does not project from the side surface of the bearing.
  • the rolling elements and raceway are typically reduced in width.
  • the width of the bearing may be increased in order to maintain the carrying capacity in comparsion with a corresponding unsealed bearing.
  • a general object of the present invention is to provide an improved large size sealed self-aligning rolling bearing, and a method for manufacturing a large size sealed self-aligning rolling bearing, which obviates the need for a bellow as a built-in sealing member.
  • the present invention relates to a large sealed self-aligning rolling bearing comprising a first ring, a second ring, rolling elements, such as symmetrical or non-symmetrical rollers having spherical contacting surfaces, which are arranged in one or more rows between the first and second rings, and a built-in sealing member comprising an annular plate with a first periphery portion.
  • the first ring comprises a mounting groove, wherein the first periphery portion is received in the mounting groove.
  • the mounting groove comprises an axially inner side wall
  • the first periphery portion of the annular plate comprises a first contacting surface arranged on an axially inner side of the annular plate, wherein the first contacting surface of the first periphery portion is arranged in abutment with the axially inner side wall, and a first resilient member is arranged in the mounting groove for sealing the mounting groove.
  • the invention is based on the realization by the inventors that a large size self-aligning bearing with improved sealing design and sealing
  • the position and location of the built-in sealing member is defined and controlled with improved accuracy.
  • the invention allows for improved and more accurate sealing pressure and cooperation between the sealing member, such as a radially inner lip portion of the sealing member, and a sealing surface having a relative rotational movement in relation to the sealing member.
  • the configuration of the built-in sealing member wherein the first contacting surface of the first periphery portion coincide with the axially inner side wall, allows for that the position of the rigid annular plate forming the body of the sealing member is locked and secured to the groove with increased accuracy and strength, such that undesired movements and bending motions of the sealing member in relation to the first ring is reduced.
  • the invention is further advantageous in that the built-in sealing member may be mounted and fitted into the mounting groove in an efficient and reliable manner.
  • the first resilient member advantageously allows for efficient mounting in the mounting groove, wherein the first contacting surface of the first periphery portion of the annular plate is secured and maintained in a durable manner in abutment with the axially inner side wall.
  • the cooperation enabling sealing functionality between the sealing member and a sealing surface, which sealing surface has a rotational movement in relation to the sealing member takes place a relatively large distance from the mounting groove.
  • the invention is advantageous in that such cooperation is improved by more accurately controlling the position of the portions of the sealing member which are located a relatively large distance from the mounting groove, for example at a location of a sealing surface arranged on the second ring.
  • a large sealed self-aligning rolling bearing is a bearing having an external diameter of 500 mm or more.
  • a built-in sealing member is a sealing member which is attached directly to one of the bearings rings, i.e. the first or second ring, which rings are monolithic annular bodies at which the raceways for the rolling elements are formed.
  • the first periphery portion is formed of the radially outer portion of the annular plate and the first ring is the outer ring.
  • the first periphery portion may also be formed of the radially inner portion of the annular plate and the first ring may be the inner ring of the bearing.
  • the first periphery portion of the annular plate comprises a second contacting surface arranged on an axially outer side of the annular plate, wherein the first resilient member is attached on the second surface of the first periphery portion.
  • sealing member and the first resilient member may advantageously be mounted simultaneously as a single unit forming the sealing member.
  • first resilient member may advantageously be attached to the annular plate in the correct position only on the second contacting surface during an attachment step, which
  • attachment step precedes the mounting of the built-in sealing member in the mounting groove of the first ring.
  • the first periphery portion of the annular plate further comprises a top surface, wherein the first resilient member is further attached on the top surface.
  • the first resilient member may advantageously be attached to the annular plate in the correct position only on the second contacting surface and the top surface.
  • the first resilient member is formed from a band-shaped element folded to form a ring and attached to the annular plate member.
  • the first contacting surface is free from resilient material, such that that the first contacting surface of the annular plate is in direct abutment with the inner side wall of the mounting groove.
  • the large sealed self- aligning rolling bearing further comprises a locking ring which is inserted into the mounting groove axially outside the first periphery portion of the annular plate for securing the sealing member in the mounting groove.
  • the locking ring advantageously forms a retaining element securing the built-in sealing member in the mounting groove in a reliable manner, such that the contacting interface between the first contacting surface and the inner side wall of the mounting groove is maintained during operation involving angular
  • the locking ring facilitates and enables cost-efficient mounting/demounting and maintenance.
  • the first resilient member is arranged between the first periphery portion and the locking ring.
  • the first resilient member is arranged in an advantageous compressed state between the annular plate and the locking ring, wherein the first resilient member, due to its compressed state, exerts a pressing force on the annular plate such that it is forced and retained in the correct position in relation to the inner side wall of the mounting groove.
  • the frictional force between the inner side wall of the mounting groove and the fist contacting surface of the annular plate advantageously allows for improved fixation of the sealing member.
  • the mounting groove comprises an axially outer side wall extending circumferentially around the first ring, wherein the locking ring is arranged in abutment with the axially outer side wall.
  • the first resilient member includes protrusions on an axially outer side facing from the annular plate, which protrusions engages with the locking ring to allow a for a reliable mounting of said sealing member.
  • the protrusions cooperate with the locking ring and allows for improved accuracy of resilient
  • first resilint member such that suitable retainmenment with suitable compression of the first resilient member may be provided, which in turn provides suitable axial clamping forces fixating the sealing member.
  • the mounting groove is situated inside a side plane of the first race ring and is arranged to taper at an angle relative to the side plane. This allows for a compact bearing solution and a durable attachment of the built-in sealing member to the first ring.
  • the axially inner side wall extending circumferentially around the first ring forms a conical surface against which the first contacting surface of the first periphery portion of the annular plate is arranged.
  • the first periphery portion and a mid section of the annular plate are joined at a first knee at which first knee the first periphery portion and mid section forms a tapering angle with respect to each other.
  • the mounting groove has an opening on the inner periphery of the first race ring which opening is situated outside a race track of the first race ring and a closed inner end which lies at a radial distance R and axially inside said opening.
  • the inner end is situated fully, or at least partially, axially inside an outer axial limit of said race track in the first race ring. This allows for a particularly compact design of the bearing.
  • the annular plate of the sealing member further comprising a second periphery portion, and the second ring comprises a sealing surface, wherein a second resilient member is attached to the second periphery portion for sealing abutment with the sealing surface on the second ring, which first and second separate resilient members are spaced apart to leave an annular land in a midsection of the annular plate in between the separate first and second resilient members.
  • the annular land is free from resilient material on both sides of the annular plate.
  • the built-in sealing member will have the thickness of only the annular plate itself, which increases the space available for the rolling elements and/or of a cage restricting the movement of the rolling elements. Misalignment can therefore be accepted to a larger degree before e.g. a roller or a cage will interfere with the sealing member.
  • a more compact bearing can be designed, which may house a wider rolling element body in relation to the total axial extension of the roller bearing.
  • a self aligning roller bearing is provided, which gives additional space for ring cages extending outside of the rolling bodies or which gives more space for the rolling bodies before the ring cage or rolling body interferes with the built- in sealing member.
  • the resilient members may be produced by turning a ring shaped element. The ring may then be cut and subsequently adhered to the annular plate ring.
  • the resilient members could also be extruded to either a band- shaped element or a ring shape.
  • the band-shaped elements may then be cut in appropriate lengths to be adhered onto the annular plate ring.
  • the resilient members may be adhered in many different ways, such as gluing or spot vulcanization around the annular plate, i.e. there is no need of large vulcanization tools.
  • the sealing surface may, according to exemplifying embodiment, be cone-shaped with its decreasing radius being directed from the centre of the roller bearing.
  • the sealing surface may also, according to an embodiment, have a spherical surface shape.
  • the first and second periphery portions are respectively constituted by a radially outer part of the annular plate positioned away from the centre axis of the annular plate and a radially inner part of the annular plate positioned toward the centre axis of the annular plate.
  • the annular plate may have a flat or a curved cross section.
  • the shape of the annular plate will generally be designed to reduce the amount that the sealing member protrudes from a side plane defined by the sides of the first and seocnd rings or to allow a portion of the built in sealing member to be flush with or lie at a small axial distance inside the side plane defined by the sides of the rings.
  • the second periphery portion and mid section are joined at a second knee, at which second knee the second periphery portion and mid section forms an angle with respect to each other.
  • the plate ring may have a curved or flat cross-section between the knees.
  • the mid section is parallel with a side plane of said first race ring and/or a side plane of said second race ring.
  • the mid section is flush with or lies at a small axial distance inside the side plane of the first race ring and/or a the plane of the second race ring.
  • the second periphery portion will be inclined toward a centre of the roller bearing.
  • the mid portion will be the part of the built in sealing member, which is located at the largest distance in an axial direction from the centre of the roller bearing. This means that by providing a mid section that is free from resilient material, the plate ring of built-in member can be located further away from the centre of the rolling bearing.
  • the second resilient member includes a lip portion extending outwardly from the annular plate to be in abutment with the sealing surface, and an attachment portion for attachment of the second resilient member to the second periphery portion, wherein a length extension of the lip portion and the attachment portion are essentially the same.
  • the first and second resilient members are each formed from a band-shaped element folded to form a ring and attached to respective periphery portions of the annular plate.
  • each of the first and second resilient members includes a joint, which joints are circumpherentially displaced in relation to each other. By circumpherentially displacing the joints, any imbalance due to the joints may be reduced.
  • the large sealed self- aligning rolling bearing is a spherical roller bearing.
  • the large sealed self-aligning rolling bearing is a toroidal roller bearing.
  • the large sealed self-aligning rolling bearing may also, according to an embodiment, be a spherical roller thrust bearing.
  • the annular plate is preferably roll formed, or press formed, from a sheet metal workpiece. It has shown to be difficult to form the annular plate with other technologies while maintaining high tolerances and preventing crack initiation for large self aligning roller bearings.
  • the present invention relates to a method for manufacturing a large sealed self-aligning rolling bearing comprising a first ring and a second ring, and rolling elements arranged in one or more rows between the first and second rings, which method
  • a built-in sealing member comprising an annular plate, which annular plate comprising a first periphery portion provided with a first resilient member, attaching the built-in sealing member to the first ring by receiving the first periphery portion and the first resilient member in a mounting groove provided in the first ring, and arranging a first contacting surface of the first periphery portion which is arranged on an axially inner side of the annular plate in abutment with an axially inner side wall of the mounting groove.
  • the method provides an improved and more compact bearing and sealing member arrangement which is advantageous in similar manners as described in relation to the first aspect of the present invention.
  • the step of attaching the resilient members to the annular plate may preferably be made by an adhesive.
  • the method further comprises attaching the first resilient member on a second contacting surface of the first periphery portion of the annular plate, which second contacting surface is arranged on an axially outer side of the annular plate.
  • the method further comprises securing the built-in sealing member to the first ring by inserting a locking ring into the mounting groove axially outside the first periphery portion of the annular plate.
  • Fig. 1 is a partial schematic cross-sectional view of an embodiment of the bearing with sealing member according to the present invention.
  • Fig. 2 is a schematic enlarged cross-sectional view of the embodiment of the bearing and sealing member in Fig. 1.
  • Fig. 3 is a partial schematic cross-sectional view of the sealing member according to an embodiment of the present invention.
  • Fig. 4 is a partial schematic cross-sectional view of the locking ring for securing the sealing member in the mounting groove, according to an embodiment of the present invention.
  • Fig. 1 a partial cross-sectional view of a large size sealed self- aligning rolling bearing 100 is illustrated. An enlarged view is shown in Fig. 2.
  • the bearing 100 comprises a first ring 1 forming the outer ring, a second ring
  • the bearing 100 also has a built-in sealing member 4 formed by an annular plate 10 having a first periphery portion 1 formed of a portion of the annular plate 10 being located at an radially outer end of the annular plate 10.
  • the first ring 1 comprises a mounting groove 5, wherein the first periphery portion 11 is received in the mounting groove 5.
  • the mounting groove 5 comprises an axially inner side wall 6, and the first periphery portion 11 comprises a first contacting surface 11a on an axially inner side of the annular plate 10, as defined in the main axial direction of the bearing 100.
  • the first contacting surface 1a of the first periphery portion 11 is arranged in abutment with the axially inner side wall 6.
  • the axially inner side wall 6 forms a conical ring-shaped surface extending circumferentially around the first ring 1 and is in direct contact with the corresponding coinciding first contacting surface 11a of the first periphery portion 11.
  • a contacting interface is formed between the inner side wall 6 and the first contacting surface 11a, which contacting interface extends at a tapered angle A from the outer radial end of the axially inner side of the annular plate 11 to the radially inner end of the axially outer side wall 6.
  • the tilted angle A is between 7 and 27 degrees, or between 12 and 22 degrees, or about 17 degrees +/- up to 2 degrees.
  • the radial extension of the contacting interface between the inner side wall 6 and the first contacting surface 1 a may for example be in the range between 1/20 and 1/3 of the radial extension of the cross-section of the annular plate 10 between the edges of the first and second periphery portions 11 and 12, or in the range between 1/10 and 1/4 of the radial extension of the cross-section of the annular plate 10 between the edges of the first and second periphery portions 11 and 12.
  • the first periphery portion 11 of the annular plate 10 comprises a second contacting surface 11b arranged on an axially outer side of the annular plate 10, such that the second contacting surface 11b is arranged on an external side of the annular plate 10 facing away from the interior of the bearing 100.
  • the first resilient member 20 is attached to and covers the second contacting surface 11 b and a top surface 11c (shown in Fig. 3) of the first periphery portion 11.
  • the first contacting surface 11a of the first periphery portion is not in contact with or covered by the resilient member 20, or any resilient material. This allows for a direct contact and a coinciding contact interface between the first contacting surface 11a and the axial inner side wall 6 in the mounting groove 5.
  • the large sealed self-aligning rolling bearing 100 further comprises a locking ring 8 which is inserted into the mounting groove 5 externally of, i.e. axially outside, the first periphery portion 11 of the annular plate 10 for securing the sealing member 4 in the mounting groove 5.
  • the first resilient member 20 is arranged between the first periphery portion 11 and the locking ring 8, such that, due to the limiting axial space in the mounting groove 5, the locking ring exerts a compressing force on the resilient member which is at least partially elastically deformed.
  • the elastically deformed resilient member exerts a suitable axial clamping force on the first periphery portion 11a of the annular plate 10 such that it is retained in the correct position in abutment with the axially inner side wall 6 of the mounting groove 5.
  • the mounting groove 5 is situated axially inside a side plane 101 of the first ring 1.
  • the mounting groove 5 has an opening 5a on the inner periphery 30 of the first ring 1 , which opening 5a is situated outside a race track 31 of the first ring 1 and a closed inner end 5b.
  • the closed inner end 5b lies at a radial distance R in relation to an outer end of the race track 31 and is axially shifted a distance L in an axial direction toward a centre of the bearing 00 to preferably be located inside said opening 5b. This allows for a particularly compact design of the bearing.
  • the first ring comprises an insertion surface 40.
  • the insertion surface 40 is provided circumferentially around and radially outside the annular opening 5b and is arranged to faciliate the insertion of the sealing member 4 and/or locking ring 8 into the mounting groove 5.
  • the insertion surface 40 guides the sealing member and/or locking ring into the correct position and alignment in the mounting groove during mounting.
  • the insersion surface forms a conical surface and has a tapering angle B in relation to a plane 102 being parallell with the bearing axis.
  • the insertion surface also facilitates insertion of the sealing member 4 without breaking the first resilient member 20.
  • the first resilient member 20 may be guide into the correct position while being gently elastically deformed by the insertion surface 40.
  • the second ring 2 forming the inner ring comprises an inner periphery 32.
  • the inner periphery 32 of the inner ring comprises a race track 33 for the rolling element 3, and a flange which is located axially outside the race track 33.
  • a guide ring 35 is provided axially outside the race track 33 on the other axial side.
  • the inner periphery 32 further comprises a sealing surface 13 arrange to cooperate with the sealing member 4.
  • the sealing surface 13 is arranged axially outside race track 33, but axially inside the side plane 101 of the first ring 1.
  • the annular plate 10 of the sealing member 4 comprises a second periphery portion 12 arranged in close proximity with the sealing surface.
  • a second resilient member 21 is attached to the second periphery portion 12 for sealing abutment with the sealing surface 13 on the second ring 2.
  • an annular land 22a is formed on an axially inner side of the annular plate 10
  • an annular land 22b is formed on an axially outer side of the annular plate 10, which annular lands 22a and 22b are free from resilient material.
  • the annular land 22a extends to the edge of the annular plate 10 on its axially inner side, thereby covering the first contacting surface 11a at the first periphery portion 11 of the annular plate 10.
  • the second resilient member 12 includes a lip portion 21a extending outwardly from the annular plate 10 towards the sealing surface 13, and an attachment portion 21b for attachment of the second resilient member 21 to the second periphery portion 12.
  • the length extension forming the lip portion 21a and the attachment portion 21b are essentially the same.
  • the lip portion 21a is in contact with and arranged in sealing abutment with the sealing surface 13.
  • the increased accuracy of the position of the annular plate 10 provides improved sealing cooperation and contact pressure between the lip portion 21a and the sealing surface 13.
  • the contact pressure between the lip portion 21a and the sealing surface 13 may be controlled with higher accuracy during annular misalignment between the first and second rings 1 , 2.
  • service life and maintenance forecasts may be improved.
  • the first periphery portion 11 and a mid section 22 of the annular plate 10 are joined at a first knee 23 at which first knee 23 the first periphery portion 11 and mid section 22 forms a tapering angle with respect to each other.
  • the second periphery portion 12 and the mid section 22 are joined at a second knee 24, at which second knee 24 the second periphery portion 12 and mid section 22 forms an angle with respect to each other.
  • the mid section 22 is essentially parallell with the side plane 101 of the first ring 1 , and the second periphery portion 12 is inclined toward a centre of the roller bearing 100.
  • the sealing member 4 depicted and described in relation to Fig, 1 and Fig, 2 is shown in a separated view.
  • the annular plate 10 which forms the body of the sealing member 4 comprises a top surface 11c which is covered by the first resilient member 20.
  • the top surface 11c is the edge of the annular ring 10.
  • the portion of the first resilient member covering the top surface 11c and being attached to the annular plate may further extend axially towards the axially inner side wall of the mounting groove and frictionally engage the side wall so as to further improve the fixation of the annular plate in its correct position in relation to the first ring.
  • the portion of the first resilient member covering the top surface 11c and being attached to the annular plate may further be arranged such that it fully occupy the space in the mounting groove. Thereby improved fixation may be provided by increased contacting surface between the first resilient member and the side walls of the mounting groove. Also, no space or void is formed in the mounting groove radially outside the annular plate.
  • the elastic deformation of the first resilient member 20 providing the retaining clamping force of the sealing member 4 in the mounting groove may be an inherent capability of the resilient material of which the first resilient member 20 is formed.
  • the first resilient member 20 may also include protrusions 20a, 20b, 20c on a side of the first resilient member 20 facing from the annular plate ring 7, which protrusions are arranged to engage with a side wall of the locking ring 8 (see Fig. 2) to allow for a secure mounting of said sealing member.
  • protrusions 20a and 20b are arranged axailly outside the second contacting surface 11 b of the annular plate 0, while protrusion 20c is arranged radially beyond the second contacting surface 11b and the top surface 11c of the annular plate 10.
  • the first and/or second resilient members 20 and 21 may for example be based on a nitrile butadiene rubber (NBR) which is a family of synthetic rubber copolymers of acrylonitrile and butadiene, or a hydrogenated nitrile butadiene rubbers (HNBR) which are saturated copolymers of acrylonitrile and butadiene, or an elastomer based on fluoro rubbers which have good resistance to heat, weathering and many other chemicals, or a carboxylated nitrile rubber, or a EPDM rubber (ethylene propylene diene monomer (M- class) rubber).
  • NBR nitrile butadiene rubber
  • HNBR hydrogenated nitrile butadiene rubbers
  • elastomer based on fluoro rubbers which have good resistance to heat, weathering and many other chemicals
  • a carboxylated nitrile rubber or a EPDM rubber (ethylene propylene diene monomer (M- class) rubber
  • Fig. 4 a schematic partial cross-sectional view of the locking ring 8 depicted and described in relation to Fig. 1 and Fig. 2, is shown in a separated view. The drawing is not true to scale.
  • the locking ring 8 has an annular shape extending circumferentially around a center axis indicated by center line 103.
  • the locking ring 8 has a tapering shape having a tapering angle C.
  • the tapering angle C may be little smaller than the tapering angle A of the mounting groove 5 (see Fig. 1). This allows for a preload between the locking ring 8 and the first resilient member 20 which clamps the sealing member 4.
  • the locking ring is forced, or wedged, into its locking position in the mounting groove such that the first resilient member is deformed, which deformation give rise to a clamping force securing the first periphery portion of the annular member against the axially inner side wall of the mounting groove.
  • the locking ring comprises an axially outer side 8a arranged to engage and to be in abutment with the axially outer side wall 7 of the mounting groove 5, and an axially inner side 8b arranged to engage and to be in abutment with the protrusions 20a, 20b, and 20c of the first resilient member 20.

Landscapes

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

Abstract

La présente invention concerne un grand palier à roulement scellé à auto-alignement (100) comprenant un premier anneau (1), un second anneau (2), des éléments de roulement (3), et un élément d'étanchéité intégré (4) comprenant une plaque annulaire (10) avec une première partie de périphérie (11). L'élément d'étanchéité (4) est reçu dans une rainure de montage (5) du premier anneau (1), une première surface de contact (11 a) de la première partie de périphérie (11) étant disposée en butée contre une paroi latérale interne en sens axial (6) de la rainure de montage (5). De plus, un élément élastique (20) est disposé dans la rainure de montage (5) pour un scellage de la rainure de montage. La présente invention concerne également un procédé de fabrication d'un grand palier à roulement scellé à auto-alignement.
EP14782694.5A 2013-04-08 2014-04-07 Grand palier à roulement scellé à auto-alignement doté d'une étanchéité améliorée Withdrawn EP2984358A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1300249 2013-04-08
PCT/SE2014/000039 WO2014168543A1 (fr) 2013-04-08 2014-04-07 Grand palier à roulement scellé à auto-alignement doté d'une étanchéité améliorée

Publications (1)

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EP2984358A1 true EP2984358A1 (fr) 2016-02-17

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EP14782694.5A Withdrawn EP2984358A1 (fr) 2013-04-08 2014-04-07 Grand palier à roulement scellé à auto-alignement doté d'une étanchéité améliorée

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Country Link
EP (1) EP2984358A1 (fr)
WO (1) WO2014168543A1 (fr)

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
CN104329376A (zh) * 2014-10-30 2015-02-04 江苏帝达贝轴承有限公司 一种密封调心滚子轴承
FR3035930A1 (fr) * 2015-05-04 2016-11-11 Skf Ab Palier comprenant un flasque d'etancheite
JP2017061972A (ja) * 2015-09-24 2017-03-30 Ntn株式会社 転がり軸受
CN109268396A (zh) * 2018-09-18 2019-01-25 贵州爱因斯凯轴承科技有限公司 一种轴承用防尘罩结构

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Publication number Priority date Publication date Assignee Title
SE451081B (sv) * 1986-03-25 1987-08-31 Skf Nova Ab Tetning for sjelvinstellande sferiska rullningslager
SE9101962L (sv) * 1991-06-26 1992-12-27 Skf Ab Taetat lager
SE0402046L (sv) * 2004-08-19 2006-02-07 Skf Ab Ett tätat lager
DE102009012076A1 (de) * 2009-03-06 2010-09-09 Schaeffler Technologies Gmbh & Co. Kg Dichtungsanordnung für ein Wälzlager sowie Pendelrollenlager mit der Dichtungsanordnung

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Title
See references of WO2014168543A1 *

Also Published As

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