CN104806643A - Sealed cylindrical roller bearing for railway - Google Patents
Sealed cylindrical roller bearing for railway Download PDFInfo
- Publication number
- CN104806643A CN104806643A CN201410038409.2A CN201410038409A CN104806643A CN 104806643 A CN104806643 A CN 104806643A CN 201410038409 A CN201410038409 A CN 201410038409A CN 104806643 A CN104806643 A CN 104806643A
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- ring
- inner ring
- seal ring
- linkage unit
- railway
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Abstract
A sealed cylindrical roller bearing for railway comprises: an inner ring provided with ribs along two axial ends; an outer ring arranged outside the inner ring, wherein an inner cavity is formed between the outer ring and the inner ring; a roller positioned in the inner cavity, wherein the roller can axially move with the outer ring relative to the inner ring; and an annular sealing cover for sealing the inner cavity at two sides of the axial direction of the inner cavity, wherein the annular sealing cover comprises an annular end cap fixedly arranged at the outer ring, encircling the inner ring and provided with an accommodating cavity, and a sealing ring positioned in the accommodating cavity, having a variable diameter and encircling the inner ring, and and when the outer ring axially moves relative to the inner ring, the sealing ring can axially move with the annular end cap relative to the inner ring, and the sealing lip of the sealing ring always contacts with the external surface of the inner ring. The problem of poor sealing effect during large axial displacement of present sealed cylindrical roller bearings for railway is solved in the invention.
Description
Technical field
The present invention relates to field of bearings, particularly relate to a kind of railway sealed type roller bearing (Cylindrical Roller Bearing is called for short CRB).
Background technique
As shown in Figure 1, existing a kind of railway sealed type roller bearing comprises: two ends are vertically equipped with the inner ring 1 of rib 1a; Be located at the outer ring 2 outside inner ring 1; Two line column rollers 3 between inner ring 1 and outer ring 2, cylindrical roller 3 can move relative to inner ring 1 together vertically with outer ring 2, when outer ring 2 is positioned at neutral position, all there is axial clearance S between every line column roller 3 and contiguous rib 1a; For stuffing box bearing, the ring packing cover 4 that prevents oiling agent from leaking from Bearing inner, a periphery of ring packing cover 4 is fixed on outer ring 2, between another periphery and rib 1a and there is gap, and what make to be realized by ring packing cover 4 is sealed into noncontact seal.
During bearing working, shown in composition graphs 1 and Fig. 2, outer ring 2 can be moved to the left from neutral position by inner ring 1 relatively vertically, until arrive limit on the left position; Or shown in composition graphs 1 and Fig. 3, outer ring 2 can move right from neutral position by inner ring 1 relatively vertically, until arrive limit on the right-right-hand limit position.
Along with the technical development of railway territory, require that the axial displacement of railway sealed type roller bearing is increasing.Above-mentioned sealed type roller bearing structure is adopted if continue, there will be following problem: as shown in the a-quadrant in Fig. 2 and Fig. 3, because outer ring 2 is when inner ring 1 moves vertically, outer ring 1 can be moved together with ring packing cover 4, therefore when the relative inner ring 1 in outer ring 2 can be caused to move to limit on the left or limit on the right-right-hand limit position, one of them rib 1a is positioned at outside ring packing cover 4 completely, namely both amass without right opposite radial, cause between ring packing cover 4 and rib 1a and there is comparatively wide arc gap, this gap can cause pump efficiency to answer (pumpingeffect), cause lubricant leakage, and environmental contaminants enters in bearing, and then reduce the life-span of bearing.
Summary of the invention
The problem to be solved in the present invention is: when the axial displacement of existing railway sealed type roller bearing is larger, sealing effect is not good.
For solving the problem, the invention provides a kind of railway sealed type roller bearing, comprising:
Two ends are vertically equipped with the inner ring of rib;
Be located at the outer ring outside described inner ring, between described outer ring and inner ring, be formed with inner chamber;
Be positioned at the roller of described inner chamber, described roller can move relative to inner ring together vertically with outer ring;
At the ring packing cover of described lumen shaft to inner chamber described in both sides sealing;
Described ring packing cover comprises:
Be fixedly arranged on and described outer ring is provided with the annular end cap of receiving cavity around described inner ring;
Be positioned at described receiving cavity inner diameter variable and around the seal ring of described inner ring, when moving vertically relative to inner ring in described outer ring, described seal ring can with annular end cap together relative to described inner ring move vertically and the sealing lip of seal ring all the time with inner ring exterior surface.
Optionally, also comprise: what be positioned at described receiving cavity is enclosed within described seal ring outer periphery also can apply elastic ring from radially-inwardly pressure to described seal ring.
Optionally, described inner ring outer surface comprises the circumference side of described rib, roller surface and connects the step surface of described circumference side and roller surface, and described step surface and joint, circumference side form mild corner.
Optionally, the longitudinal section of described sealing lip external frame is arc, described seal ring to move vertically to circumference side from described roller surface or when described circumference moves vertically towards roller surface, described sealing lip external frame contacts with described mild corner and relative movement.
Optionally, the axial inner ends face of described sealing lip external frame and seal ring forms wedge angle in joint, thus makes the contact between described sealing lip and inner ring outer surface be linear contact lay.
Optionally, described receiving cavity is formed with opening diametrically and radially inwardly stretches out described receiving cavity to make described sealing lip from described opening near described inner ring place, the axial both sides of described receiving cavity have outer side wall and madial wall, and described madial wall internal diameter size is less than outer side wall internal diameter size.
Optionally, described seal ring comprises the linkage unit that multiple circumferentially head and the tail dock successively, and the linkage unit of any two docking can relatively rotate to change described seal diameter.
Optionally, in the linkage unit of any two docking of described seal ring, the stem of a linkage unit is provided with and is positioned at axial inner ends face and the groove running through linkage unit along described seal ring radial direction, the stem of this linkage unit is made to be formed with corresponding projection, the afterbody of another linkage unit is provided with and is positioned at axial outer end face and the groove running through linkage unit along described seal ring radial direction, make the afterbody of this linkage unit be formed with corresponding projection, the projection of two linkage units is contained in the groove of the other side respectively.
Optionally, in the linkage unit of any two docking of described seal ring, the stem of a linkage unit is provided with slot, the afterbody of another linkage unit is provided with the plug-in unit embedded in described slot.
Compared with prior art, technological scheme of the present invention has the following advantages:
Seal diameter can change with the change of inner ring outer surface diameter, thus ensures that seal ring seals with inner ring exterior surface all the time, and, even if bearing has larger axial displacement, also still there is good sealing effect.
Accompanying drawing explanation
Fig. 1 is the part sectioned view of the outer ring of existing a kind of railway sealed type roller bearing section vertically when being positioned at neutral position;
Fig. 2 is the part sectioned view of section vertically when outer ring is positioned at limit on the left position in Fig. 1;
Fig. 3 is the part sectioned view of section vertically when outer ring is positioned at limit on the right-right-hand limit position in Fig. 1;
Fig. 4 is the part sectioned view of the outer ring of railway sealed type roller bearing in first embodiment of the present invention section vertically when being positioned at neutral position;
Fig. 5 is seal ring perspective view in one of the states and partial enlarged drawing in Fig. 4;
Fig. 6 is seal ring perspective view in another state and partial enlarged drawing in Fig. 4;
The part sectioned view of section and partial enlarged drawing vertically when Fig. 7 is a certain position of outer ring between neutral position and limit on the right-right-hand limit position in Fig. 4;
Fig. 8 is part sectioned view and the partial enlarged drawing of section vertically when outer ring is positioned at limit on the right-right-hand limit position in Fig. 4;
Fig. 9 is the part plan structural representation of seal ring in the second embodiment of the present invention.
Embodiment
As shown in Figure 4, the railway sealed type roller bearing of first embodiment of the invention comprises:
Two ends are vertically equipped with the inner ring 10 of rib 11, circumference side S1, roller surface S3 that the outer surface of inner ring 10 comprises rib 11 and the step surface (mark) be connected between circumference side S1 and roller surface S3, described step surface and S1 joint, circumference side form mild corner S2, making between circumference side S1 and described step surface can gently transition, in the present embodiment, corner S2 is fillet, and in other embodiments, corner S2 also can be chamfering;
Be located at the outer ring 20 outside inner ring 10, between outer ring 20 and inner ring 10, be formed with inner chamber G;
Be positioned at the roller 30 of inner chamber G, roller 30 can move relative to inner ring 10 together vertically with outer ring 20;
At the ring packing cover 40 of inner chamber G axial both sides sealing inner chamber G, ring packing cover 40 comprises: to be fixedly arranged on outer ring 20 and around the annular end cap 41 of inner ring 10, annular end cap 41 has radially extension and relative outer side wall, madial wall 411, and the receiving cavity 410 between outer side wall, madial wall 411, receiving cavity 410 is formed with opening diametrically and radially inwardly stretches out outside receiving cavity 410 from described opening to make sealing lip L near inner ring 10 place; Be positioned at receiving cavity 410 inner diameter variable and around the seal ring 42 of inner ring 10, in outer ring 20 when inner ring 10 moves vertically, seal ring 42 can with annular end cap 41 together relative to inner ring 10 move vertically and the sealing lip L of seal ring 42 all the time with inner ring 10 exterior surface; What be positioned at receiving cavity 410 is enclosed within seal ring 42 outer periphery also can apply elastic ring 43 from radially inner pressure to seal ring 42.
In the present embodiment, in seal ring 42, the longitudinal section (axis of seal ring 42 is positioned on this longitudinal section) of sealing lip L external frame is arc, make seal ring 42 when roller surface S3 moves vertically to circumference side S1 or moves vertically to roller surface S3 from circumference side S1, the external frame of sealing lip L can contact with the corner S2 of rib 11 and relative movement, thus can reduce the wearing and tearing to seal ring 42.
In the present embodiment, the external frame of sealing lip L and the axial inner ends face of seal ring 42 are formed with wedge angle (mark) in joint, make the contact between sealing lip L and inner ring 10 outer surface be linear contact lay, to reduce the wearing and tearing to seal ring 42.
As shown in Figure 5, seal ring 42 comprises: the linkage unit 420 that multiple (for four in figure) circumferentially docks from beginning to end successively, and the linkage units 420 of any two docking can relatively rotate the diameter changing seal ring 42.
In the present embodiment, in the linkage unit 420 of any two docking of seal ring 42, the stem of the first linkage unit 420 is provided with and is positioned at axial outer end face and the groove T1 running through linkage unit 420 along seal ring 42 radial direction, the stem of the first linkage unit 420 is made to be formed with corresponding projection T3, the afterbody of the second linkage unit 420 is provided with and is positioned at axial inner ends face and the groove T2 running through linkage unit 420 along seal ring 42 radial direction, the afterbody of the second linkage unit 420 is made to be formed with corresponding projection T4, the projection of two linkage units 420 embeds in the groove of the other side respectively, namely the projection T3 of the first linkage unit 420 embeds in the groove T2 of the second linkage unit 420, the projection T4 of the second linkage unit 420 is contained in the groove T1 of the first linkage unit 420, the docking of two linkage units 420 is realized with this.
When two linkage units 420 docked relatively rotate to direction A close gradually each other, the diameter of seal ring 42 reduces gradually, as shown in Figure 6, when the stem of a linkage unit 420 and the afterbody of another linkage unit 420 is seamless be bonded together time, the diameter of seal ring 42 is decreased to minimum value; When dock two linkage units 420 to each other gradually away from direction B relatively rotate time, the diameter of seal ring 42 increases gradually.
In the present embodiment, interval between the madial wall of annular end cap 41, lateral part 411 should be a bit larger tham the thickness of seal ring 42, makes two of the seal ring 42 between madial wall, lateral part 411 linkage units 420 docked can relatively rotate to change the diameter of seal ring 42.But, should ensure that the interval between madial wall, lateral part 411 can not be excessive, prevent two linkage units docked 420 from misplacing.
In addition, shown in composition graphs 8, the internal diameter of madial wall 411 is less than the internal diameter of outer side wall 411, prevents seal ring 42 from moving axially process from circumference side S1 to roller surface S3, and outer side wall 411 can interfere with the corner S2 of rib 11; In addition, enough little gap should be kept between madial wall 411 and inner ring 10 outer surface, so, move axially process at seal ring 42 from roller surface S3 to circumference side S1, madial wall 411 can play a supportive role to sealing lip L, prevents sealing lip L from offseting.
Composition graphs 4, shown in Fig. 7 to 8, in outer ring 20 relative to inner ring 10 from the process of neutral position limit position movement vertically to the right, left side annular end cap 41 can with left side seal ring 42 successively along the circumference side S1 of left side rib 11, the corner S2 of left side rib 11, the roller surface S3 of inner ring 10 moves, because elastic ring 43 can apply radially inner pressure by seal ring 42 to the left, when making left side seal ring 42 move to roller surface, sealing lip L still contacts with inner ring 10, in moving process, the diameter of left side seal ring 42 can change with the change of inner ring 10 external diameter, wherein, left side seal ring 42 when moving along corner S2 elastic ring 43 can to the left seal ring 42 apply radially inner pressure make its diameter comparatively before reduce, meanwhile, right circular end cap 41 can move with the circumference side S1 of right side seal ring 42 along right side rib 11, and the sealing lip L of right side seal ring 42 contacts with inner ring 10 all the time.
Continue composition graphs 4, shown in Fig. 7 to 8, in outer ring 20 relative to inner ring 10 is from limit on the right-right-hand limit position to the process of neutral position movement vertically, left side annular end cap 41 can with left side seal ring 42 successively along the roller surface S3 of inner ring 10, the corner S2 of left side rib 11, the circumference side S1 of left side rib 11 moves, because elastic ring 43 can apply radially inner pressure by seal ring 42 to the left, the sealing lip L of left side seal ring 42 is contacted with inner ring 10 all the time, in moving process, the diameter of left side seal ring 42 can change with the change of inner ring 10 external diameter, wherein, when left side seal ring 42 moves along corner S2, its diameter can increase comparatively before, and apply to elastic ring 43 the diameter also increase comparatively before that radially outer pressure makes elastic ring 43, meanwhile, right circular end cap 41 can move with the circumference side S1 of right side seal ring 42 along right side rib 11, and the sealing lip L of right side seal ring 42 contacts with inner ring 10 all the time.
Existing bearing be sealed into noncontact seal, and the present embodiment bearing be sealed into contact seal, and seal diameter can with inner ring outer surface diameter change and change, thus ensure seal ring seal with inner ring exterior surface all the time.And, even if the bearing of the present embodiment has larger axial displacement, also still there is good sealing effect.
Can know by inference according to above-mentioned, outer ring 20 relative to inner ring 10 from neutral position limit position or when moving vertically from limit on the left position to neutral position, the working method of two ring packing covers 40, does not repeat them here left.
In the second embodiment of the present invention, also the docking of two linkage units in seal ring can be realized in the following manner: as shown in Figure 9, in the linkage unit 420 of any two docking of seal ring 42, the stem of a linkage unit 420 is provided with slot T5, the afterbody of another linkage unit 420 is provided with the plug-in unit T6 corresponding with slot T5, plug-in unit T5 embeds in slot T6, realizes the docking of two linkage units 420 with this.Slot T5 does not run through linkage unit 420 along the radial direction of seal ring 42.
In other embodiments, also can realize the docking of adjacent two linkage units in seal ring by other means, as long as ensure that the linkage unit of two docking can relatively rotate to change seal diameter.
It should be noted that, the seal ring in technical solution of the present invention should only not be confined to be made up of multiple circumferentially linkage unit that head and the tail dock successively, and it also can adopt the cyclic structure of other variable diameters.
As shown in Figure 4, in the present embodiment, the material of seal ring 42 is antifriction material (also claiming low friction coefficient materials), to reduce the friction between seal ring 42 and inner ring 10.Described antifriction material can be PTFE(Polytetrafluoroethene, teflon).In other embodiments, seal ring 42 also can adopt the less material of other friction factor to make.
Continue with reference to shown in Fig. 4, in the present embodiment, elastic ring 43 is spring.In other embodiments, elastic ring 43 also can adopt other can apply the elastic structure of radially inner pressure to seal ring 42.
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 (9)
1. a railway sealed type roller bearing, comprising:
Two ends are vertically equipped with the inner ring of rib;
Be located at the outer ring outside described inner ring, between described outer ring and inner ring, be formed with inner chamber;
Be positioned at the roller of described inner chamber, described roller can move relative to inner ring together vertically with outer ring;
At the ring packing cover of described lumen shaft to inner chamber described in both sides sealing;
It is characterized in that, described ring packing cover comprises:
Be fixedly arranged on and described outer ring is provided with the annular end cap of receiving cavity around described inner ring;
Be positioned at described receiving cavity inner diameter variable and around the seal ring of described inner ring, when moving vertically relative to inner ring in described outer ring, described seal ring can with annular end cap together relative to described inner ring move vertically and the sealing lip of described seal ring all the time with inner ring exterior surface.
2. railway sealed type roller bearing according to claim 1, is characterized in that, also comprise: what be positioned at described receiving cavity is enclosed within described seal ring outer periphery also can apply elastic ring from radially-inwardly pressure to described seal ring.
3. railway sealed type roller bearing according to claim 1, it is characterized in that, described inner ring outer surface comprises the circumference side of described rib, roller surface and connects the step surface of described circumference side and roller surface, and described step surface and joint, circumference side form mild corner.
4. railway sealed type roller bearing according to claim 3, it is characterized in that, the longitudinal section of described sealing lip external frame is arc, described seal ring to move vertically to circumference side from described roller surface or when described circumference moves vertically towards roller surface, described sealing lip external frame contacts with described mild corner and relative movement.
5. railway sealed type roller bearing according to claim 4, is characterized in that, the axial inner ends face of described sealing lip external frame and seal ring forms wedge angle in joint, thus makes the contact between described sealing lip and inner ring outer surface be linear contact lay.
6. railway sealed type roller bearing according to claim 1, it is characterized in that, described receiving cavity is formed with opening diametrically and radially inwardly stretches out outside described receiving cavity from described opening to make described sealing lip near described inner ring place, the axial both sides of described receiving cavity have outer side wall and madial wall, and described madial wall internal diameter size is less than outer side wall internal diameter size.
7. the sealed type roller bearing of the railway according to any one of claim 1 to 6, it is characterized in that, described seal ring comprises the linkage unit that multiple circumferentially head and the tail dock successively, and the linkage unit of any two docking can relatively rotate to change described seal diameter.
8. railway sealed type roller bearing according to claim 7, it is characterized in that, in the linkage unit of any two docking of described seal ring, the stem of a linkage unit is provided with and is positioned at axial inner ends face and the groove running through linkage unit along described seal ring radial direction, the stem of this linkage unit is made to be formed with corresponding projection, the afterbody of another linkage unit is provided with and is positioned at axial outer end face and the groove running through linkage unit along described seal ring radial direction, the afterbody of this linkage unit is made to be formed with corresponding projection, the projection of two linkage units is contained in the groove of the other side respectively.
9. railway sealed type roller bearing according to claim 7, it is characterized in that, in the linkage unit of any two docking of described seal ring, the stem of a linkage unit is provided with slot, the afterbody of another linkage unit is provided with the plug-in unit embedded in described slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410038409.2A CN104806643B (en) | 2014-01-26 | 2014-01-26 | The sealed cylinder roller bearing of railway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410038409.2A CN104806643B (en) | 2014-01-26 | 2014-01-26 | The sealed cylinder roller bearing of railway |
Publications (2)
| Publication Number | Publication Date |
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| CN104806643A true CN104806643A (en) | 2015-07-29 |
| CN104806643B CN104806643B (en) | 2019-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410038409.2A Active CN104806643B (en) | 2014-01-26 | 2014-01-26 | The sealed cylinder roller bearing of railway |
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| CN (1) | CN104806643B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108119532A (en) * | 2018-01-26 | 2018-06-05 | 宁夏杰创电子商务有限公司 | Chain type rolls low speed bearing in isolation retainer |
| CN108253017A (en) * | 2018-01-26 | 2018-07-06 | 宁夏杰创电子商务有限公司 | Chain type rolls isolation retainer full speed thrust bearing |
| CN108317166A (en) * | 2018-01-26 | 2018-07-24 | 宁夏杰创电子商务有限公司 | The chain type that bearing outer ring is axially movable rolls isolation retainer bearing |
| CN108331834A (en) * | 2018-01-26 | 2018-07-27 | 宁夏杰创电子商务有限公司 | Chain type rolls isolation retainer high-speed bearing |
| CN108331840A (en) * | 2018-01-26 | 2018-07-27 | 宁夏杰创电子商务有限公司 | Chain type rolls isolation retainer |
| CN113483018A (en) * | 2021-08-17 | 2021-10-08 | 洛阳轴承研究所有限公司 | Joint bearing and shield machine using joint bearing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108119532A (en) * | 2018-01-26 | 2018-06-05 | 宁夏杰创电子商务有限公司 | Chain type rolls low speed bearing in isolation retainer |
| CN108253017A (en) * | 2018-01-26 | 2018-07-06 | 宁夏杰创电子商务有限公司 | Chain type rolls isolation retainer full speed thrust bearing |
| CN108317166A (en) * | 2018-01-26 | 2018-07-24 | 宁夏杰创电子商务有限公司 | The chain type that bearing outer ring is axially movable rolls isolation retainer bearing |
| CN108331834A (en) * | 2018-01-26 | 2018-07-27 | 宁夏杰创电子商务有限公司 | Chain type rolls isolation retainer high-speed bearing |
| CN108331840A (en) * | 2018-01-26 | 2018-07-27 | 宁夏杰创电子商务有限公司 | Chain type rolls isolation retainer |
| CN113483018A (en) * | 2021-08-17 | 2021-10-08 | 洛阳轴承研究所有限公司 | Joint bearing and shield machine using joint bearing |
| CN113483018B (en) * | 2021-08-17 | 2023-05-05 | 洛阳轴承研究所有限公司 | Joint bearing and shield tunneling machine using same |
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|---|---|
| CN104806643B (en) | 2019-05-10 |
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