CN104712661A - Rolling bearing - Google Patents
Rolling bearing Download PDFInfo
- Publication number
- CN104712661A CN104712661A CN201310676113.9A CN201310676113A CN104712661A CN 104712661 A CN104712661 A CN 104712661A CN 201310676113 A CN201310676113 A CN 201310676113A CN 104712661 A CN104712661 A CN 104712661A
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- CN
- China
- Prior art keywords
- contact surface
- rolling bearing
- ring
- seal ring
- sealing contact
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- 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.)
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- Rolling Contact Bearings (AREA)
- Sealing Devices (AREA)
- Sealing Of Bearings (AREA)
Abstract
A rolling bearing comprises an inner ring; an outer ring positioned outside the inner ring; a plurality of rolling elements positioned between the inner ring and the outer ring and circumferentially distributed at intervals; and two sealing rings respectively positioned at two sides of the axial direction of the rolling bearing, wherein the outer rim portions of the sealing rings tightly fits with the outer ring, the inner ring can rotate relative to the sealing rings and is provided with a contact surface corresponding to the sealing contact surfaces of the sealing rings, and at least one of the contact surface and the sealing contact surfaces is provided with a plurality of hydrodynamic grooves; when the rolling bearing does not work, the contact surface is in surface contact with the sealing contact surfaces; and when the rolling bearing works, the sealing contact surfaces can lose contact with the contact surface. A problem that present sealed rolling bearings cannot give consideration to difficult wearing or good sealing effect of the sealing rings is solved in the invention.
Description
Technical field
The present invention relates to field of bearings, particularly relate to a kind of rolling bearing.
Background technique
Existing machinery sealing is divided into contact seal and noncontact seal two kinds.As shown in Figure 1, the rolling bearing of existing a kind of contact seal comprises: the seal ring 1 with sealing lip 11, and seal ring 1 comprises the rubber ring 13 of framework ring 12 and wrapping frame ring 12; Be positioned at the inner ring 2 of seal ring 1, outer surface 21 and sealing lip 11 linear contact lay of inner ring 2, make this bearing have good sealing effect.But when inner ring 2 opposing seal circle 1 rotates, seal ring 1 can contact all the time with inner ring 2, seal ring 1 is made easily to wear and tear and produce heat.
As shown in Figure 2, the rolling bearing of existing a kind of noncontact seal comprises: seal ring 3; Be positioned at the inner ring 4 of seal ring 3, between the outer surface 41 of seal ring 3 and inner ring 4, there is the interval 5 being about 1mm.When inner ring 4 rotates relative to seal ring 3, because the interval 5 between seal ring 3 and inner ring 4 is comparatively large, seal ring 3 is not easy wearing and tearing, but sealing can be caused unreliable, and extraneous pollutant is easy to enter Bearing inner, and internal lubricant is easily revealed.
Summary of the invention
The problem to be solved in the present invention is: existing sealed type rolling bearing cannot have both the advantage that seal ring is not easy wearing and tearing, good sealing effect.
For solving the problem, the invention provides a kind of rolling bearing, comprising:
Inner ring;
Be positioned at the outer ring outside described inner ring;
Some rolling elements circumferentially spaced apart between described inner ring and outer ring;
Two seal rings laying respectively at the axial both sides of rolling bearing, the outer edge of described seal ring and outer ring drive fit, described inner ring can rotate and be provided with the contact surface corresponding with the sealing contact surface of described seal ring by opposing seal circle, in described contact surface, sealing contact surface, one of them is provided with some fluid dynamic pressure grooves;
When described rolling bearing does not work, described contact surface contacts with sealing contact surface face; During described rolling bearing work, described sealing contact surface and contact surface are separated.
Optionally, some fluid dynamic pressure grooves to be located on sealing contact surface and in array distribution.
Optionally, described fluid dynamic pressure groove is circular trough, triangular groove, rectangle groove, man type chute or splayed shape groove.
Optionally, described sealing contact surface is the toroidal surface around described seal ring axis.
Optionally, described seal ring has: the end face being positioned at described sealing contact surface both sides vertically, is wherein provided with the annular groove around seal ring axis near the end face of described rolling element in the axial direction.
Optionally, described seal ring also has and is connected to chamfering between described end face and sealing contact surface or fillet.
Optionally, described seal ring is rubber ring.
Optionally, the skeleton coaxial with rubber ring is enclosed with in described rubber ring.
Compared with prior art, technological scheme of the present invention has the following advantages:
When rolling bearing works, the sealing contact surface of seal ring and the contact surface of inner ring are separated, and make sealing configuration be not easy wearing and tearing.Meanwhile, because the gap between the sealing contact surface of seal ring and the contact surface of inner ring is very little, therefore can prevent from revealing, play good sealing effect.
Accompanying drawing explanation
Fig. 1 is the part sectioned view of the rolling bearing section vertically of existing a kind of contact seal;
Fig. 2 is the part sectioned view of the rolling bearing section vertically of existing a kind of noncontact seal;
Fig. 3 is the part sectioned view of rolling bearing section vertically in one embodiment of the present of invention;
Fig. 4 is the perspective view of seal ring in one embodiment of the present of invention;
Fig. 5 is the sectional view along AA section in Fig. 4;
Fig. 6 is the partial enlarged drawing in the P region of Fig. 4 in one embodiment of the present of invention;
Fig. 7 is the partial enlarged drawing in the P region of Fig. 4 in another embodiment of the present invention;
Fig. 8 is the partial enlarged drawing in the P region of Fig. 4 in another embodiment of the present invention.
Embodiment
As shown in Figure 3 and Figure 4, the rolling bearing of the present embodiment comprises:
Inner ring 210;
Be positioned at the outer ring 220 outside inner ring 210;
Rolling element 230 some circumferentially spaced apart between inner ring 210 and outer ring 220;
Two lay respectively at the axial both sides of rolling bearing and have the seal ring 100 of sealing contact surface S1, and sealing contact surface S1 is toroidal surface around seal ring 100 axis and is provided with some fluid dynamic pressure grooves 110; The outer edge of seal ring 100 and outer ring 220 drive fit, inner ring 210 can rotate and be provided with the contact surface 211 corresponding with the sealing contact surface S1 of seal ring 100 by opposing seal circle 100.
When rolling bearing does not work, the sealing contact surface S1 of seal ring 100 contacts with the contact surface of inner ring 210 211.
During rolling bearing work, sealing contact surface S1 due to seal ring 100 is provided with the some fluid dynamic pressure grooves 110 being filled with oiling agent, therefore, when inner ring 210 opposing seal circle 100 rotates, under the effect of hydrodynamic effect, sealing contact surface S1 and contact surface 211 can be separated, and are filled with one deck hydrodynamic film between sealing contact surface S1 and contact surface 211, make seal ring 100 be not easy wearing and tearing.In addition, because the gap between the sealing contact surface S1 of seal ring 100 and the contact surface 211 of inner ring 210 is very little, approximate oil slick thickness, therefore can prevent from revealing, play good sealing effect.
In other embodiments, the sealing contact surface S1 of seal ring 100 can not have fluid dynamic pressure groove 110 yet, but fluid dynamic pressure groove 110 is set at the contact surface 211 of inner ring 210; Or the sealing contact surface S1 of seal ring 100 and the contact surface 211 of inner ring 210 are provided with fluid dynamic pressure groove 110 simultaneously.These two kinds of technological schemes also can obtain the beneficial effect of last technological scheme, namely have both the advantage being not easy wearing and tearing, good sealing effect simultaneously.
It should be noted that, in the present invention, the geometric parameter of fluid dynamic pressure groove 110 can not arbitrarily be arranged (comprising groove depth, groove footpath ratio, quantity), and following requirement need be met: when rolling bearing works, hydrodynamic effect can be utilized the sealing contact surface S1 of seal ring 100 and the contact surface 211 of inner ring 210 to be separated.
The geometric parameter of fluid dynamic pressure groove 110 and multiple factor, size, the working condition of mechanical seal, the running parameter of sealing configuration etc. as the material of seal ring 100, sealing contact surface S1 are relevant.Therefore, the geometric parameter of fluid dynamic pressure groove 110 need be controlled as the case may be.
As shown in Figure 6, fluid dynamic pressure groove 110 can be circular trough; Or as shown in Figure 7, fluid dynamic pressure groove 110 can triangular groove; Or as shown in Figure 8, fluid dynamic pressure groove 110 can be rectangle groove.In other embodiments, fluid dynamic pressure groove 110 also can be set to other shapes, as man type chute, splayed shape groove etc.
In the present embodiment, continue with reference to shown in Fig. 6 to Fig. 8, the some fluid dynamic pressure grooves 110 on sealing contact surface S1 are in array distribution.
In the present embodiment, shown in composition graphs 4 and Fig. 5, seal ring 100 also has: two end face S2 being positioned at sealing contact surface S1 both sides vertically, and end face S2 can perpendicular to seal ring 100 axis; Be connected to the chamfering S3 between end face S2 and sealing contact surface S1.
By arranging chamfering S3 between end face S2 and sealing contact surface S1, avoiding and forming 90 degree of wedge angles at the intersection location place of end face S2 and sealing contact surface S1, the edge stress of seal ring 100 can not only be reduced, also make the installation of seal ring 100 more convenient.In other embodiments, by arranging fillet between end face S2 and sealing contact surface S1, also same object can be reached.
Shown in composition graphs 3, end face S2 in the axial direction near roller 230 in seal ring 100 is provided with the annular groove 120 around seal ring 100 axis, so not only can save the making material of seal ring 100, can also make that there is in Seal cage enough oiling agent holding spaces.
In the present embodiment, seal ring 100 is rubber ring, and is enclosed with the framework ring (not shown) coaxial with seal ring 100 in rubber ring.The effect of described framework ring is: prevent seal ring 100 from deforming under the effect in the external world, so that cannot play due seal action.The material of described rubber ring can be nitrile butadiene rubber or fluorine rubber.
In the present embodiment, can outer race annular spring (not shown) of seal ring 100, this annular spring can apply to seal ring 100 pressure radially pointing to seal ring 100, when rolling bearing is not worked seal ring 100 can with inner ring 210 close contact.But this annular spring is applied to the pressure of seal ring 100 can not be too large, and when working to avoid rolling bearing, the sealing contact surface S1 of seal ring 100 cannot depart from the contact surface 211 of inner ring 210.
It should be noted that, in the present invention, the structure of described seal ring is not limited only to given embodiment.By can realize prior art any face contact sealing, the sealing contact surface of seal ring forms described fluid dynamic pressure groove, all can form seal ring of the present invention.
Although the present invention discloses as above, the present invention is not defined in this.Any those skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should be as the criterion with claim limited range.
Claims (8)
1. a rolling bearing, is characterized in that, comprising:
Inner ring;
Be positioned at the outer ring outside described inner ring;
Some rolling elements circumferentially spaced apart between described inner ring and outer ring;
Two seal rings laying respectively at the axial both sides of rolling bearing, the outer edge of described seal ring and outer ring drive fit, described inner ring can rotate and be provided with the contact surface corresponding with the sealing contact surface of described seal ring by opposing seal circle, in described contact surface, sealing contact surface, one of them is provided with some fluid dynamic pressure grooves;
When described rolling bearing does not work, described contact surface contacts with sealing contact surface face; During described rolling bearing work, described sealing contact surface and contact surface are separated.
2. rolling bearing according to claim 1, is characterized in that, some fluid dynamic pressure grooves to be located on sealing contact surface and in array distribution.
3. rolling bearing according to claim 2, is characterized in that, described fluid dynamic pressure groove is circular trough, triangular groove, rectangle groove, man type chute or splayed shape groove.
4. rolling bearing according to claim 2, is characterized in that, described sealing contact surface is the toroidal surface around described seal ring axis.
5. rolling bearing according to claim 4, is characterized in that, described seal ring has: the end face being positioned at described sealing contact surface both sides vertically, is wherein provided with the annular groove around seal ring axis near the end face of described rolling element in the axial direction.
6. rolling bearing according to claim 5, is characterized in that, described seal ring also has and is connected to chamfering between described end face and sealing contact surface or fillet.
7. the rolling bearing according to any one of claim 1 to 6, is characterized in that, described seal ring is rubber ring.
8. rolling bearing according to claim 7, is characterized in that, is enclosed with the skeleton coaxial with rubber ring in described rubber ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310676113.9A CN104712661A (en) | 2013-12-11 | 2013-12-11 | Rolling bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310676113.9A CN104712661A (en) | 2013-12-11 | 2013-12-11 | Rolling bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104712661A true CN104712661A (en) | 2015-06-17 |
Family
ID=53412280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310676113.9A Pending CN104712661A (en) | 2013-12-11 | 2013-12-11 | Rolling bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104712661A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882507A (en) * | 2017-12-06 | 2019-06-14 | 舍弗勒技术股份两合公司 | Bearing arrangement for dual-clutch transmission |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3501155A (en) * | 1967-05-22 | 1970-03-17 | Gen Motors Corp | Bi-directional seal |
| US3572730A (en) * | 1969-06-13 | 1971-03-30 | Timken Co | Wear surface for facilitating lubrication of elements in engagement therewith |
| EP0033963A2 (en) * | 1980-02-07 | 1981-08-19 | Firma Carl Freudenberg | Radial shaft sealing ring |
| EP0165298A1 (en) * | 1983-11-30 | 1985-12-27 | Federal-Mogul Corporation | Producing shafts which are substantially directionally balanced hydrodynamically when rotated in either direction |
| JP2000356224A (en) * | 1999-06-16 | 2000-12-26 | Koyo Seiko Co Ltd | Sealing device for rolling bearing |
| US20080106041A1 (en) * | 2004-12-16 | 2008-05-08 | Uchiyama Manufactuing Corp. | Seal Structure of Rotation Member |
| CN201277329Y (en) * | 2008-10-30 | 2009-07-22 | 淮北高罗输送装备有限公司 | Three-lip bearing sealing ring |
-
2013
- 2013-12-11 CN CN201310676113.9A patent/CN104712661A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3501155A (en) * | 1967-05-22 | 1970-03-17 | Gen Motors Corp | Bi-directional seal |
| US3572730A (en) * | 1969-06-13 | 1971-03-30 | Timken Co | Wear surface for facilitating lubrication of elements in engagement therewith |
| EP0033963A2 (en) * | 1980-02-07 | 1981-08-19 | Firma Carl Freudenberg | Radial shaft sealing ring |
| EP0165298A1 (en) * | 1983-11-30 | 1985-12-27 | Federal-Mogul Corporation | Producing shafts which are substantially directionally balanced hydrodynamically when rotated in either direction |
| JP2000356224A (en) * | 1999-06-16 | 2000-12-26 | Koyo Seiko Co Ltd | Sealing device for rolling bearing |
| US20080106041A1 (en) * | 2004-12-16 | 2008-05-08 | Uchiyama Manufactuing Corp. | Seal Structure of Rotation Member |
| CN201277329Y (en) * | 2008-10-30 | 2009-07-22 | 淮北高罗输送装备有限公司 | Three-lip bearing sealing ring |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882507A (en) * | 2017-12-06 | 2019-06-14 | 舍弗勒技术股份两合公司 | Bearing arrangement for dual-clutch transmission |
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Application publication date: 20150617 |
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| RJ01 | Rejection of invention patent application after publication |