WO2016055061A1

WO2016055061A1 - Sealing arrangement, sealed machine element arrangement and rolling bearing with sealed rolling body chamber

Info

Publication number: WO2016055061A1
Application number: PCT/DE2015/200459
Authority: WO
Inventors: Vanessa JACOB; Gustavo Moraes Candido de OLIVEIRA
Original assignee: Schaeffler Technologies AG & Co. KG
Priority date: 2014-10-10
Filing date: 2015-09-18
Publication date: 2016-04-14
Also published as: DE102014220584A1

Abstract

The present invention relates to a sealing arrangement (01) for sealing: a chamber (23) between a first machine element (20) and a second machine element (19), wherein the first and second machine elements (20, 19) are arranged concentrically to one another and one of the two machine elements (20, 19) can be rotated relative to the other of the two machine elements (20, 19). The sealing arrangement comprises a slinger ring (02) arranged on the outside in the axial direction, which slinger ring (02) extends over the chamber (23) and has an end region (04) angled in the direction of the chamber (23), which end region (04) is attached to the second machine element (10). Furthermore, a sealing ring (03) is provided inside in the axial direction, comprising an angled end region (05) attached to the first machine element (20) extending in the direction of the slinger ring (02), wherein the end region (05) extends axially at least up to the slinger ring (02). At least one elastic sealing lip (09, 10) of the sealing ring abuts on the slinger ring (02) with a sealing border (13, 14). An elastic connection means (17) extends in the radial direction in order to connect the slinger ring (02) and the sealing ring (03). The sealing arrangement (01) is characterized in that the connection means is configured as a circumferential edge (17) extending in the radial direction. The invention also relates to a sealed machine element arrangement and a rolling bearing having a sealed rolling body chamber.

Description

Dichtunasanordnuna. sealed Maschinenelementanordnuna and rolling bearings with sealed Wälzkörperraum

The present invention relates to a sealing arrangement for sealing a space between a first machine element and a second

Machine element, wherein the first and second machine element are arranged concentrically with each other and one of the two machine elements with respect to the other of the two machine elements is rotatable. The inventive

Sealing arrangement is preferably used in bearings, in particular for rolling bearings, where it serves to seal the Wälzkörperraums. In addition, however, the seal assembly according to the invention may also generally be used for seals between machine elements, such as between a shaft and a housing. Rolling bearing seals prevent the ingress of solid contaminants and moisture into the rolling bearing. At the same time they ensure that the im

Rolling bearing existing lubricant is held in the rolling bearing. Cassette seals are known from the prior art, which consist for example of metal rings with L-shaped cross-section, which are arranged offset to one another.

Between the two metal rings elastic sealing lips are arranged. Similar seals are also used in similar machine elements to seal a cavity between the machine elements.

DE 10 2011 077 729 A1 describes a sealing arrangement, in particular a cassette seal, with a carrier ring attached to a first bearing ring and a cover ring which is relatively movable relative to the carrier ring and fastened to a second bearing ring. The carrier ring carries at least one sealing lip forming elastic part. The sealing lip forms a sliding sealing contact with the

Cover ring. The elastic member has an axially at a radially extending

Part of the support ring arranged supernatant, wherein the supernatant radially at least partially covers a radial end portion of the cover. DE 10 2005061 168 A1 shows a radial bearing with a cartridge seal, which is arranged axially adjacent to the rolling elements between the inner and outer ring in a press fit. The cartridge seal comprises a carrier, a seal attached thereto, and an angle sheet ring against which sealing lips of the seal abut.

Between the angle sheet metal ring and the inner ring, an additional sealant for static sealing is arranged. The two metal rings of the cartridge seal must be assembled in the rolling bearing before assembly. So that this loose unit can not fall apart during transport, it is known both

Metal rings to connect through additional connecting means.

DE 198 53 187 A1 shows a cassette seal for rolling bearings with two coaxial L-shaped metal rings, which are mounted upside down, and arranged between two metal rings elastic sealing lips. The two coaxial L-shaped metal rings are connected by means of elastic lugs to form a structural unit. This ensures that the assembled metal rings in the assembly in

Rolling bearings do not fall apart. The elastic lugs are mounted on the circumference of the radially outer metal ring axially opposite the roller bearing and directed radially inwards. To reduce friction, the lugs are preferably at a distance from the radially inner metal ring.

The object of the present invention is to provide an improved

Sealing arrangement for sealing a space between a first and a second machine element, which are rotatable relative to each other to provide, in which the individual components of the seal assembly are reliably connected by a connecting means. The lanyard should be easy to manufacture and assemble. Furthermore, an arrangement comprising a first and a second machine element, which are rotatable relative to one another, as well as a sealing arrangement for sealing a space between the two should also be provided

Machine elements are provided. Finally, a rolling bearing should be provided with a sealed Wälzkörperraum. To achieve the object of the invention, a seal assembly according to the appended claim 1, a sealed machine element assembly according to claim 9 and a rolling bearing according to claim 10. The seal assembly according to the invention serves to seal a space between a first machine element and a second machine element, wherein first and second machine element concentric are arranged to each other and one of the two machine elements in relation to the other of the two machine elements is rotatable. The seal arrangement comprises an in

Sliding ring arranged on the outside in the axial direction, which extends in the radial direction over the space and directed in the direction of the space

has angled end portion which is fixed to the second machine element. Another component of the sealing arrangement is a sealing ring disposed axially inwardly with a fixed to the first machine element, extending in the direction of the slinger end, wherein the end axially extends at least to the slinger, and at least one elastic sealing lip with a sealing ring on the slinger. At the outer edge of the end portion of the sealing ring is an elastic

Connecting means arranged which extends in the radial direction. The connecting means is used to connect the slinger and sealing ring and is inventively designed as a circumferential, extending in the radial direction edge.

An advantage of the solution according to the invention is the fact that as

circumferential edge executed connecting means is easy to manufacture and can be easily integrated into the seal assembly. Due to the peripheral design of the connecting means, a reliable connection of

Slinger and seal are guaranteed. According to a preferred embodiment, the edge is at a distance from

Slinger on. As a result, additional friction losses during operation, ie during the rotation of the machine elements to each other, can be avoided. The sealing ring preferably comprises a reinforcement, on which a

Sealing lip comprehensive elastomeric body is attached. As a result of the reinforcement, deformation of the sealing ring by forces occurring during operation can be effectively avoided. The reinforcement is preferably made of sheet metal.

A particularly preferred embodiment uses an elastomeric body which extends axially beyond the end region of the sealing ring to the edge. Elastomer body and edge are preferably made in one piece. An elastomer body designed in this way initially has the advantage that the sealing ring can be attached particularly well to the first machine element via the elastomer body. The elastomeric body can be fastened for example via an adhesive connection on the machine element. Under certain circumstances, additional fastening means can be dispensed with due to acting adhesion forces. Furthermore, by the elastomeric material any bumps on the first

Machine element are balanced, whereby the elastomer body always fits well on the machine element. The one-piece design of elastomer body and edge simplify manufacture and assembly of the seal assembly.

An advantageous embodiment uses a sealing ring with two angularly aligned elastic sealing lips, each having a sealing edge. By using two sealing lips, the sealing effect can be increased.

As appropriate, has continued to use a further elastic

Sealing lip proven with a voltage applied to the second machine element sealing edge. By using such a positioned third sealing lip is a

additional sealing. The sealing effect is thus further increased.

According to a further advantageous embodiment, the slinger and the sealing ring have an L-shaped cross-section. The use of such profiled rings has proved to be useful. There are of course other, suitable

Profiles possible. Slinger and the reinforcement of the sealing ring are preferably made of stainless material to prevent corrosion of these parts. According to an advantageous embodiment, the slinger is provided with an additional coating. As a result, it is possible to reduce wear of the slinger caused by dirt deposits in the sealing lips.

The sealed machine element assembly according to the invention comprises a first machine element and a second machine element, wherein first and second machine element are arranged concentrically to each other and one of the two machine elements in relation to the other of the two machine elements is rotatable, and a sealing arrangement for sealing a space between the first and second machine element according to one of those already described

Embodiments.

According to a particularly preferred embodiment, first and second

Machine element bearing rings of a rolling bearing, so that according to the invention a rolling bearing with a sealed Wälzkörperraum, for receiving

Rolling used, is provided.

Preferred embodiments of the invention will be explained in more detail with reference to the accompanying figures. Show it:

Fig. 1 shows two perspective views of an inventive

Sealing arrangement according to a first embodiment;

Fig. 2 is a perspective view of a rolling bearing with built-in

Sealing arrangement according to FIG. 1;

3 shows a perspective view of the sealing arrangement according to the invention in accordance with a second embodiment;

Fig. 4 is a perspective view of a rolling bearing with built-in

Sealing arrangement according to FIG. 3. Fig. 1 shows two perspective views of an inventive

Sealing arrangement 01 according to a first embodiment. The seal assembly 01 according to the invention comprises a slinger 02 and a sealing ring 03. Slinger 02 and seal ring 03 have in the embodiment shown an L-shaped cross-section. The angled end portions 04, 05 of

Slinger 02 and sealing ring 03 are facing each other, extend axially substantially parallel and are radially spaced, so that both rings 02, 03 enclose a preferably rectangular cross-section space. The slinger 02 is preferably made of a sheet of stainless material. In the embodiment shown, the sealing ring 03 comprises a reinforcement 07 and has an elastomer body 08 fixed to the reinforcement 07. The

Attachment of the elastomeric body 08 to the reinforcement 07 can take place, for example, by vulcanization. The elastomer body 08 has three angularly aligned elastic sealing lips 09, 10, 12, which extend in the direction of the slinger 02. A first sealing lip 09 rests circumferentially against the radially extending region of the slinger 02 with a first sealing edge 13. A second sealing lip 10 is connected via a second sealing edge 14 in contact with the angled end portion 04 of the slinger 02, in turn circulating. And a third sealing lip 12 is located with a third sealing edge 15 in the installed state at one

Machine element (see Fig. 2).

The seal assembly 01 further includes a arranged on the outer edge of the angled end portion 05 of the seal ring 03, extending in the radial direction circumferential edge 17. The edge 17 is made of an elastic material and extends parallel to the outside of the radially

extending portion of the slinger 02. It thereby serves as

Connecting means for connecting the slinger 02 and sealing ring 03 and thus ensures that the two rings 02, 03 are held in their assembled state. Between edge 17 and slinger 02 is in the installed state preferably a small distance, so that upon rotation of the rings 02, 03 each additional friction losses are avoided. Fig. 2 shows a perspective view of a rolling bearing 18 with built-in

The rolling bearing 18 comprises an inner ring 19 and an outer ring 20. Between the bearing rings 19, 20 a plurality of rolling elements 22 are arranged in a rolling body space 23. The seal assembly 01 serves to seal the Wälzkörperraums. In the installed state, the slinger 02 is arranged lying outside in the axial direction. The slinger 02 is attached via its angled end portion 04 on the inner ring 19 of the bearing. The axially inner sealing ring 03 is over its angled

End region 05 is fixed to the outer ring 20.

Fig. 3 shows a perspective view of the seal assembly according to the invention according to a second embodiment. In contrast to the embodiment of FIG. 1, the elastomer body 08 extends continuously to the peripheral edge 17. Elastomer body 08 and edge 17 are preferably made in one piece, which brings both manufacturing technology and assembly advantages. When installed, the sealing ring 03 is thus connected via the elastomer body 08 with the outer ring 20, for example glued.

Fig. 4 shows the seal assembly of FIG. 3, installed in a rolling bearing, in a perspective view.

Bezuaszeichenllste

01 sealing arrangement

02 slinger

03 sealing ring

04 angled end section slinger

05 angled end sealing ring 06

07 Reinforcement

08 Elastomer body

09 first sealing lip

10 second sealing lip

11

12 third sealing lip

13 first sealing edge

14 second sealing edge

15 third sealing edge

16

17 peripheral edge

18 bearings

19 inner ring

20 outer ring

21

22 rolling elements

23 rolling body space

Claims

Claims 1. Sealing arrangement (01) for sealing a space (23) between a first machine element (20) and a second machine element (19), wherein first and second machine elements (20, 19) are arranged concentrically to one another and one of the two machine elements (20, 19) is rotatable with respect to the other of the two machine elements (20, 19), the seal arrangement comprising:

A sling ring (02) to be arranged externally in the axial direction, which extends in the radial direction over a length that is dependent on the extent of the space to be sealed (23), and has an axially angled end portion (04), which at the second Machine element (19) can be fixed.

A sealing ring (03) to be arranged inside in the axial direction with an angled part which can be fixed on the first machine element (20) and extends in the direction of the slinger (02)

End region (05), wherein the end region (05) extends axially at least to the slinger (02), and with at least one elastic sealing lip (09, 10) with one on the slinger (02) adjacent

Sealing edge (13, 14); and

A radially extending elastic connecting means (17) arranged on the outer edge of the end region (05) of the sealing ring (03) for connecting the slinger (02) and the sealing ring (03),

characterized in that the connecting means as a circumferential, extending in the radial direction edge (17) is formed.

Second sealing arrangement (01) according to claim 1, characterized in that the edge (17) has a distance from the slinger (02).

3. Sealing arrangement (01) according to claim 1 or 2, characterized in that the sealing ring (03) has a reinforcement (07) on which a sealing lip (09, 10) comprehensive elastomer body (08) is attached.

4. Sealing arrangement (01) according to claim 3, characterized in that the elastomer body (08) extends axially over the end region (05) of the sealing ring (03) continuously up to the edge (17).

5. Sealing arrangement (01) according to claim 4, characterized in that the elastomer body (08) and the edge (17) are integrally formed.

6. Sealing arrangement (01) according to one of claims 1 to 5, characterized

characterized in that the sealing ring (03) two angles to each other

aligned elastic sealing lips (08, 09) each having a sealing edge (13, 14).

7. Sealing arrangement (01) according to one of claims 1 to 6, characterized

in that the sealing ring (03) has a further elastic sealing lip (12) with a sealing edge (15) which can be applied to the second machine element (19).

8. Sealing arrangement (01) according to one of claims 1 to 7, characterized

characterized in that the slinger (02) and sealing ring (03) have an L-shaped cross-section.

9. Sealed machine element assembly comprising a first

Machine element (20) and a second machine element (19), wherein first and second machine element (20, 19) are arranged concentrically with each other and one of the two machine elements (20, 19) with respect to the other of the two machine elements (20, 19) is rotatable , as well as continue one

Sealing arrangement (01) according to one of claims 1 to 8, for sealing a space (23) between the first and second

Machine element (20. 19).

10. Rolling with an inner ring (19), an outer ring (20) and a

between these extending, sealed space (23) for receiving rolling elements (22), characterized in that in the space to be sealed (23) a sealing arrangement according to one of claims 1 to 8 is mounted.