CN115654025A - Non-contact sealing assembly for bearing inner cavity and bearing - Google Patents
Non-contact sealing assembly for bearing inner cavity and bearing Download PDFInfo
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- CN115654025A CN115654025A CN202211282705.8A CN202211282705A CN115654025A CN 115654025 A CN115654025 A CN 115654025A CN 202211282705 A CN202211282705 A CN 202211282705A CN 115654025 A CN115654025 A CN 115654025A
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- 238000007789 sealing Methods 0.000 title claims abstract description 302
- 230000000694 effects Effects 0.000 abstract description 5
- 239000004519 grease Substances 0.000 description 11
- 230000001050 lubricating effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000002035 prolonged effect Effects 0.000 description 7
- 239000003344 environmental pollutant Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 230000032683 aging Effects 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000000979 retarding effect Effects 0.000 description 2
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
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Abstract
The invention provides a non-contact sealing assembly for a bearing inner cavity and a bearing, belonging to the technical field of bearings. The non-contact sealing assembly for the inner cavity of the bearing can effectively solve the technical problem that the sealing effect of a non-contact sealing structure in the prior art is poor.
Description
Technical Field
The invention relates to a non-contact sealing assembly for a bearing inner cavity and a bearing, and belongs to the technical field of bearings.
Background
In recent years, axle box bearings of domestic and foreign high-speed rail vehicles have been developed into grease-lubricated integral maintenance-free tapered roller/cylindrical bearings, the actual online operation speed can reach 380km/h, the maintenance-free period is gradually improved from 120 kilometers, 145 kilometers to 165 kilometers, and at this time, the design of a sealing structure is particularly important.
At present, there are two main sealing structures for bearings, one is contact sealing, the sealing structure includes an outer frame fixedly mounted on an outer ring of a bearing, an inner frame fixedly mounted on an inner ring of the bearing, and a sealing member fixed on the outer frame, the sealing member is in contact with the inner frame to seal an inner cavity of the bearing, for example, chinese patent application publication No. 2016.04.06 and No. CN105465188A discloses a bearing, the sealing structure in the bearing is contact sealing, although the sealing structure can effectively prevent grease from leaking, when the bearing is operated, the inner frame can generate sliding friction with the sealing member under the driving of the inner ring of the bearing, especially under a high-speed working condition, the friction member is easy to age and deform due to high temperature generated by friction. The other type is a non-contact type seal of a pure framework, the seal structure comprises an outer framework and an inner framework, the outer framework is fixedly arranged on an outer ring of the bearing, the inner framework is fixedly arranged on an inner ring of the bearing, the outer framework serves as an outer ring seal assembly, the inner framework serves as an inner ring seal assembly, and the inner framework and the outer framework are matched to form a seal channel.
Disclosure of Invention
The invention aims to provide a non-contact sealing assembly for a bearing inner cavity, which aims to solve the technical problem that a non-contact sealing structure in the prior art is poor in sealing effect. Meanwhile, the invention also provides a bearing to solve the problems.
The non-contact sealing assembly for the inner cavity of the bearing adopts the following technical scheme:
the non-contact sealing assembly for the inner cavity of the bearing comprises an outer ring sealing assembly fixedly mounted on an outer ring of the bearing during use and an inner ring sealing assembly fixedly mounted on an inner ring of the bearing during use, wherein an inner layer sealing channel and an outer layer sealing channel are formed between the outer ring sealing assembly and the inner ring sealing assembly in the axial direction, and the inner layer sealing channel and the outer layer sealing channel are labyrinth sealing channels.
Has the advantages that: the invention provides an improved non-contact type sealing assembly for a bearing inner cavity, which is characterized in that an outer ring sealing assembly is arranged on a bearing outer ring, an inner ring sealing assembly is arranged on a bearing inner ring, and an inner layer sealing channel and an outer layer sealing channel are formed between the outer ring sealing assembly and the inner ring sealing assembly in the axial direction and are labyrinth sealing channels, so that foreign matters can be effectively prevented from entering the bearing inner cavity and lubricating grease in the bearing inner cavity is effectively prevented from leaking out through the sealing channels; in addition, the sealing assembly is a non-contact sealing structure, so that when the inner ring and the outer ring of the bearing rotate relatively, the inner ring and the outer ring of the sealing assembly can be prevented from being in friction contact, the problems of aging and deformation of a sealing element caused by friction are avoided, the service life of the sealing assembly is prolonged, and the use cost of the sealing assembly is reduced. In summary, compared with the sealing assembly in the prior art, the non-contact sealing assembly provided by the invention creatively forms a double-layer labyrinth sealing channel in the axial direction, so that the sealing quality of the sealing assembly is improved; in addition, the sealing assembly is a non-contact sealing structure, so that the frictional contact of the inner ring sealing assembly and the outer ring sealing assembly is avoided, and the service life of the sealing assembly is prolonged.
Further, the outer ring sealing assembly comprises an outer framework and an outer elastic sealing element, the inner ring sealing assembly comprises an inner framework and an inner elastic sealing element, the outer layer sealing channel is formed between the inner framework and the outer framework in the axial direction, and the inner layer sealing channel is formed between the inner elastic sealing element and the outer elastic sealing element.
Has the advantages that: because the sealing channel is a labyrinth sealing channel, the outer layer sealing channel is formed by the inner framework and the outer framework, and the inner layer sealing channel is formed by the inner elastic sealing element and the outer elastic sealing element, the processing difficulty of the sealing component can be reduced, and the production cost of the sealing component is reduced.
Furthermore, the inner elastic sealing element and the outer elastic sealing element are respectively provided with a sealing section which extends towards each other in the axial direction, and the sealing sections on the two elastic sealing elements are arranged at intervals in a staggered mode in the radial direction to form the inner layer sealing channel.
Has the beneficial effects that: the labyrinth sealing channel is formed by the staggered and spaced arrangement of the sealing sections on the two elastic sealing elements, so that the bending times of the sealing channel can be increased, the length of the sealing channel is further prolonged, the difficulty of lubricating grease escaping from the inner cavity of the bearing and pollutants entering the inner cavity of the bearing is increased, and the sealing quality of the sealing assembly is improved.
Furthermore, an inner annular sealing groove is formed in the inner framework, an outer annular sealing groove is formed in the outer framework, notches of the inner annular sealing groove and the outer annular sealing groove are arranged towards the inner cavity of the bearing when in use, one of the two annular sealing grooves is located in the other annular sealing groove when in use, and the outer layer sealing channel is formed between corresponding walls of the two annular sealing grooves.
Has the advantages that: during the use, one in interior annular seal groove and the outer annular seal groove is located another, and the notch all arranges in order to form outer sealed passageway towards the bearing inner chamber, has reduced seal assembly's occupation space in the axial, has enlarged seal assembly's use scene.
Further, one of the inner and outer elastomeric seals is located in an annular seal groove near the inner cavity side of the bearing.
Has the advantages that: when the sealing assembly is used, one of the inner elastic sealing element and the outer elastic sealing element is arranged in the annular sealing groove close to the inner cavity side of the bearing, so that the occupied space of the sealing assembly can be further reduced in the axial direction, and the sealing assembly can still be used in a use scene with a tight installation space.
Furthermore, the sealing assembly also comprises a mounting seat, the inner ring sealing assembly is fixedly mounted on the mounting seat, and the mounting seat is mounted on the inner ring of the bearing when in use.
Has the advantages that: during the use, earlier with inner circle seal assembly fixed mounting on the mount pad, install the mount pad on the bearing inner race again, can make bearing inner race seal assembly's installation more convenient, and then promote seal assembly's packaging efficiency.
Further, the mounting seat comprises a mounting shaft, the inner ring sealing assembly is sleeved on the mounting shaft, one end of the mounting shaft is mounted on the bearing inner ring when in use, and the other end of the mounting shaft is provided with a stop surface for stop matching with the inner ring sealing assembly.
Has the advantages that: when the bearing inner ring sealing assembly is used, the inner ring sealing assembly is sleeved on the mounting shaft, the stop surface is used for limiting the inner ring sealing assembly, the mounting shaft is mounted on the bearing inner ring, the sleeving mode is stable, the inner ring sealing assembly is mounted more quickly due to the design of the positioning surface, and therefore the assembling efficiency and the service life of the sealing assembly are improved.
Further, at least one of the inner and outer layer sealing channels has a large-size section and a small-size section in the extending direction thereof.
Has the advantages that: the small-size section and the large-size section can form different pressure differences at the corresponding sections, so that the flow speed of lubricating grease or pollutants in the sealing channel is delayed, and the sealing quality of the sealing assembly is improved.
The bearing adopts the following technical scheme:
the bearing comprises a sealing assembly, wherein the sealing assembly comprises an outer ring sealing assembly fixedly arranged on a bearing outer ring during use and an inner ring sealing assembly fixedly arranged on a bearing inner ring during use, an inner layer sealing channel and an outer layer sealing channel are formed between the outer ring sealing assembly and the inner ring sealing assembly in the axial direction, and the inner layer sealing channel and the outer layer sealing channel are labyrinth sealing channels.
Has the advantages that: the invention provides an improved bearing, when in use, an outer ring sealing component is arranged on an outer ring of the bearing, an inner ring sealing component is arranged on an inner ring of the bearing, and an inner layer sealing channel and an outer layer sealing channel are formed between the outer ring sealing component and the inner ring sealing component in the axial direction and are labyrinth sealing channels, so that foreign matters can be effectively prevented from entering an inner cavity of the bearing and lubricating grease in the inner cavity of the bearing is prevented from leaking out through the sealing channels; in addition, the sealing assembly is a non-contact sealing structure, so that when the inner ring and the outer ring of the bearing rotate relatively, the inner ring and the outer ring of the sealing assembly can be prevented from being in friction contact, the problems of aging and deformation of a sealing element caused by friction are avoided, the service life of the sealing assembly is prolonged, and the use cost of the sealing assembly is reduced. By combining the analysis, compared with the bearing in the prior art, the bearing provided by the invention creatively forms a double-layer labyrinth type sealing channel in the axial direction, so that the sealing quality of the sealing assembly is improved; in addition, the sealing assembly is a non-contact sealing structure, so that the frictional contact of the inner ring sealing assembly and the outer ring sealing assembly is avoided, and the service life of the sealing assembly is prolonged.
Further, the outer ring sealing assembly comprises an outer framework and an outer elastic sealing element, the inner ring sealing assembly comprises an inner framework and an inner elastic sealing element, the outer layer sealing channel is formed between the inner framework and the outer framework in the axial direction, and the inner layer sealing channel is formed between the inner elastic sealing element and the outer elastic sealing element.
Has the advantages that: because the sealing channel is a labyrinth sealing channel, an outer layer sealing channel is formed by the inner framework and the outer framework, and an inner layer sealing channel is formed by the inner elastic sealing element and the outer elastic sealing element, the processing difficulty of the sealing assembly can be reduced, and the production cost of the sealing assembly is reduced.
Furthermore, the inner elastic sealing element and the outer elastic sealing element are respectively provided with sealing sections which extend towards each other in the axial direction, and the sealing sections on the two elastic sealing elements are arranged in a staggered and spaced mode in the radial direction to form the inner layer sealing channel.
Has the advantages that: the labyrinth sealing channel is formed by the staggered and spaced arrangement of the sealing sections on the two elastic sealing elements, so that the bending times of the sealing channel can be increased, the length of the sealing channel is further prolonged, the difficulty of lubricating grease escaping from the inner cavity of the bearing and pollutants entering the inner cavity of the bearing is increased, and the sealing quality of the sealing assembly is improved.
Furthermore, an inner annular sealing groove is formed in the inner framework, an outer annular sealing groove is formed in the outer framework, notches of the inner annular sealing groove and the outer annular sealing groove are arranged towards the inner cavity of the bearing when in use, one of the two annular sealing grooves is located in the other one when in use, and the outer layer sealing channel is formed between corresponding walls of the two annular sealing grooves.
Has the beneficial effects that: during the use, one in interior annular seal groove and the outer annular seal groove is located another, and the notch all arranges in order to form outer sealed passageway towards the bearing inner chamber, has reduced seal assembly's occupation space in the axial, has enlarged seal assembly's use scene.
Further, one of the inner and outer elastomeric seals is located in an annular seal groove near the inner cavity side of the bearing.
Has the advantages that: when the sealing assembly is used, one of the inner elastic sealing element and the outer elastic sealing element is arranged in the annular sealing groove close to the inner cavity side of the bearing, so that the occupied space of the sealing assembly can be further reduced in the axial direction, and the sealing assembly can still be used in a use scene with a tight installation space.
Furthermore, the sealing assembly also comprises a mounting seat, the inner ring sealing assembly is fixedly mounted on the mounting seat, and the mounting seat is mounted on the inner ring of the bearing when in use.
Has the advantages that: during the use, earlier with inner circle seal assembly fixed mounting on the mount pad, install the mount pad on the bearing inner race again, can make bearing inner race seal assembly's installation more convenient, and then promote seal assembly's packaging efficiency.
Further, the mounting seat comprises a mounting shaft, the inner ring sealing assembly is sleeved on the mounting shaft, one end of the mounting shaft is mounted on the bearing inner ring when in use, and the other end of the mounting shaft is provided with a stop surface for stop matching with the inner ring sealing assembly.
Has the advantages that: when the bearing is used, the inner ring sealing assembly is sleeved on the mounting shaft, the stop surface is used for limiting the inner ring sealing assembly, then the mounting shaft is mounted on the bearing inner ring, the sleeving mode is stable, the inner ring sealing assembly is mounted more quickly due to the design of the positioning surface, and therefore the assembling efficiency and the service life of the sealing assembly are improved.
Further, at least one of the inner and outer layer sealing channels has a large-sized section and a small-sized section in the extending direction thereof.
Has the advantages that: the small-size section and the large-size section can form different pressure differences at the corresponding sections, so that the flow speed of lubricating grease or pollutants in the sealing channel is delayed, and the sealing quality of the sealing assembly is improved.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of a bearing according to the present invention;
fig. 2 is an enlarged view of a point a in fig. 1.
The names of the components corresponding to the corresponding reference numerals in the drawings are:
100. a bearing inner race; 101. an outer race of the bearing; 200. an inner skeleton; 201. an outer skeleton; 202. an outer annular seal groove; 203. an inner annular seal groove; 204. a boss; 205. a pit; 300. an inner elastomeric seal; 301. an inner seal section; 302. an outer elastomeric seal; 303. an outer seal section; 400. a mounting base; 401. installing a shaft; 402. a stop surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is to be noted that, in the embodiments of the present invention, relational terms such as "first" and "second", and the like, which may be present in the terms of the first and second, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, terms such as "comprises," "comprising," or any other variation thereof, which may be present, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the possible occurrence of the phrases "comprising a limited element of '8230', \8230;" 8230; "etc. does not exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.
In the description of the invention, unless expressly stated or limited otherwise, the terms "mounted", "connected" and "connected" when used in this context are to be construed broadly, as for example they may be fixedly connected, releasably connected or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meanings of the above-mentioned terms in the present invention can be understood by those skilled in the art through specific situations.
The present invention will be described in further detail with reference to examples.
Embodiment 1 of the bearing of the present invention:
as shown in fig. 1, the bearing provided by the present embodiment includes a bearing outer ring 101 and a bearing inner ring 100, and a seal assembly is disposed on the bearing, and the seal assembly includes an outer ring seal assembly and an inner ring seal assembly. When the bearing is used, the outer ring sealing assembly is fixedly arranged on the bearing outer ring 101, the inner ring sealing assembly is fixedly arranged on the bearing inner ring 100, an inner layer sealing channel and an outer layer sealing channel are formed between the outer ring sealing assembly and the inner ring sealing assembly in the axial direction, and the inner layer sealing channel and the outer layer sealing channel are both labyrinth sealing channels and are communicated with each other.
In this embodiment, for convenience of description, in the radial direction, the direction toward the bearing axis is defined as inward. The outer ring sealing assembly comprises an outer framework 201 and an outer elastic sealing element 302, the inner ring sealing assembly comprises an inner framework 200 and an inner elastic sealing element 300, the outer layer sealing channel is formed between the inner framework 201 and the outer framework 201 in the axial direction, and the inner layer sealing channel is formed between the inner elastic sealing element 302 and the outer elastic sealing element 302. As shown in fig. 1 and 2, an outer frame 201 is arranged coaxially with a bearing outer ring 101, an outer annular seal groove 202 is provided on the outer frame 201, an inner frame 200 is arranged coaxially with a bearing inner ring 100, an inner annular seal groove 203 is provided on the inner frame 200, notches of the inner and outer annular seal grooves are arranged towards a bearing inner cavity, the outer annular seal groove 202 is located in the inner annular seal groove 203 and is in clearance fit with the inner annular seal groove 203, and a gap between the inner and outer annular seal grooves 202 (specifically, a gap between groove bottoms of the two annular seal grooves and a gap between groove walls of the two annular seal grooves) forms an outer seal channel.
In this embodiment, in order to ensure the sealing effect, the width between the outer groove walls of the inner and outer annular sealing grooves 202 located in the outer gap is 1mm, and the width between the inner groove walls of the inner and outer annular sealing grooves located in the inner gap is 1.2mm. The gap between the bottom of the inner annular sealing groove 203 and the bottom of the outer annular sealing groove 202 is provided with a small-size section and a large-size section in the extending direction, the small-size section is positioned at the outer side of the large-size section, the width of the small-size section is 0.5mm, and the width of the large-size section is 1mm. Here, the change in the gap width may create a different pressure differential, thereby retarding the flow rate of grease or contaminants in the sealed channel.
In this embodiment, to reduce the space occupied by the seal assembly, the inner and outer elastic seals are arranged axially opposite to each other, and the outer elastic seal 302 is arranged in the outer annular seal groove 202 because the outer annular seal groove 202 is arranged close to the inner cavity side of the bearing.
In this embodiment, as shown in fig. 2, an outer sealing section 303 is disposed on the outer elastic sealing element 302, the cross section of the outer elastic sealing element 302 in the axial direction is "E" shaped, an inner sealing section 301 is disposed on the inner elastic sealing element 300, the cross section of the inner elastic sealing element 300 in the axial direction is "inverted F" shaped, and the outer sealing section 303 and the inner sealing section 301 are arranged in a staggered manner in the radial direction at intervals, so that an inner layer sealing channel is formed between the two elastic sealing elements.
In this embodiment, to ensure the sealing effect, the inner and outer sealing sections are arranged in parallel at intervals, in the radial direction, the width of the gap between the adjacent inner and outer sealing sections is 3mm, in the axial direction, the width of the gap between the inner sealing section 301 located at the outermost side and the outer elastic sealing element 302 is 3mm, the width of the gap between the outer sealing section 303 located at the innermost side and the inner elastic sealing element 300 is 6mm, and the width of the gap between the inner sealing section 301 located at the middle side and the outer elastic sealing element 302 is 2.5mm. Here, the change in the gap width may create a different pressure differential, thereby retarding the flow rate of grease or contaminants in the sealed channel.
In this embodiment, the inner elastic sealing element 300 is in clearance fit with the outer skeleton 201, and as shown in fig. 2 in particular, in the radial direction, the inner groove wall of the outer annular sealing groove 202 is arranged at an interval between the inner sealing segment 301 located in the middle and the inner sealing segment 301 located at the innermost side, the gap between the inner annular sealing element and the outer skeleton 201 forms a middle sealing passage, and the inner and outer sealing passages are communicated with each other through the middle sealing passage.
In this embodiment, in order to ensure the sealing effect, in the axial direction, the width of the gap between the inner groove wall of the outer annular seal groove 202 and the inner annular seal is 5mm, in the radial direction, the width of the gap between the inner groove wall of the outer annular seal groove 202 and the inner seal segment 301 located in the middle is 0.9mm, the width of the gap between the inner groove wall of the outer annular seal groove 202 and the inner seal segment 301301 located at the outermost side is 0.7mm, here, different pressure differences can be formed due to the change of the gap width, and then the flow of lubricating grease or pollutants is delayed.
In this embodiment, as shown in fig. 2, the outer frame 201 further includes a connecting portion, the connecting portion is provided with a boss 204, and when the outer frame 201 is mounted and fixed on the bearing outer ring 101, the outer frame 201 is press-fitted in the tooth mouth groove of the bearing outer ring 101 through the boss 204. In addition, as shown in fig. 2, a concave pit 205 is further arranged near the boss 204, and the depth of the concave pit 205 is 0.15mm, and the width of the concave pit 205 is 1.2mm, so that deformation of the outer frame 201 and the bearing outer ring 101 in the press-fitting process when the interference fit amount is large is relieved.
In this embodiment, as shown in fig. 2, the inner ring seal assembly is fixedly mounted on the bearing inner ring 100 by a mounting seat 400. Specifically, the mounting seat 400 includes a mounting shaft 401, the inner frame 200 and the inner elastic sealing element 300 are sleeved on the mounting shaft 401, one end of the mounting shaft 401 is fixedly mounted to the bearing inner ring 100, the other end of the mounting shaft 401 is provided with a stopping surface 402, and the inner frame 200 and the stopping surface 402 are in axial stopping fit to position the inner ring sealing assembly during mounting.
In this embodiment, in order to enhance the sealing reliability and stability and environmental adaptability, the outer frame 201 and the inner frame 200 are made of cold-rolled steel sheets, and the elastic sealing ring is made of engineering plastic polymer, such as PA66, PTFE, and the like. In addition, in order to enhance the oxidation resistance and the corrosion resistance, the surfaces of the inner and outer frameworks 201 are galvanized, and the average thickness of the plating layer is 0.05mm.
Before the bearing provided by the embodiment is used, the outer framework 201 is fixedly installed on the bearing outer ring 101, the inner framework 200 is fixedly installed on the bearing inner ring 100 through the installation seat 400, and an outer layer sealing channel is formed between the inner framework 201 and the outer framework 201 in the axial direction; in addition, the outer elastic sealing member 302 is fixedly mounted on the bearing outer ring 101 through the outer frame 201, the inner elastic sealing member 300 is fixedly mounted on the bearing inner ring 100 through the mounting seat 400, and an inner layer sealing channel is formed between the inner and outer elastic sealing members.
In the embodiment, because the inner-layer sealing channel and the outer-layer sealing channel are formed between the outer ring sealing component and the inner ring sealing component in the axial direction and are labyrinth sealing channels, foreign matters can be effectively prevented from entering the inner cavity of the bearing and lubricating grease in the inner cavity of the bearing is effectively prevented from leaking out through the sealing channels; in addition, the sealing assembly is of a non-contact sealing structure, so that the inner ring sealing assembly and the outer ring sealing assembly can be prevented from being in friction contact when rotating relatively between the inner ring and the outer ring of the bearing, the problems of aging and deformation of a sealing element caused by friction are avoided, the service life of the sealing assembly is prolonged, and the use cost of the sealing assembly is reduced.
In other embodiments of the bearing, one of the inner and outer layer sealing channels has a large dimension section and a small dimension section in the direction of extension thereof. Alternatively, neither the inner or outer sealing channel has a large-sized section or a small-sized section in the extending direction thereof.
In other embodiments of the bearing, the mounting seat does not include a mounting shaft, the mounting seat includes a mounting table, the mounting table is arranged in plurality in the circumferential direction of the bearing inner race, and the inner race seal assembly is supported and mounted on the bearing inner race by the mounting table.
In other embodiments of the bearing, the inner race seal assembly is fixedly mounted directly on the bearing inner race.
In other embodiments of bearing, in the axial direction, form middle sealed passageway between outer elastic sealing element and the inner frame, specifically be, specifically, interior annular seal groove is located outer annular seal groove, and at this moment, the inner frame is arranged in the one side that is close to the bearing inner chamber, conveniently makes and forms middle sealed passageway between outer elastic sealing element and the inner frame.
In other embodiments of the bearing, the outer annular seal is in clearance fit with the outer skeleton, specifically, an outer seal section on the outer annular seal is in clearance fit with an inner groove wall of the outer annular seal groove, a gap between the outer seal section and the outer skeleton forms a bent path on an axial cross section, and the bent path is communicated with the bent channel through the bent path.
In other embodiments of the bearing, the outer seal passage is not formed by the respective walls of the inner and outer annular seal grooves, and the inner and outer bobbins each have zigzag-shaped bent extensions, and the bent extensions of the both bobbins form the outer seal passage therebetween.
In other embodiments of the bearing, the inner layer sealing channel is not formed by the staggered and spaced arrangement of the inner and outer sealing sections, the inner and outer elastic sealing elements are both provided with bent extension sections extending in a helical tooth shape, and the inner layer sealing channel is formed between the bent extension sections on the inner and outer elastic sealing elements.
In other embodiments of the bearing, the outer ring seal assembly does not include an outer frame and an outer elastic sealing element, the inner ring seal assembly does not include an inner frame and an inner elastic sealing element, the inner and outer ring seal assemblies are respectively a whole piece, and an inner layer sealing channel and an outer layer sealing channel which are communicated with each other are formed between the inner and outer ring seal assemblies in the axial direction.
In other embodiments of the bearing, the inner and outer annular seals have a gap width of 2.5mm in the axial direction. Alternatively, the inner and outer annular seals may have a gap width of 6mm in the axial direction.
In other embodiments of the bearing, the spacing between adjacent inner and outer seal segments in the radial direction is 0.8mm. Alternatively, the spacing between adjacent inner and outer seal sections is 1mm.
In other embodiments of the bearing, the gap between the inner and outer annular seal groove walls is 1mm wide. Or the width of the gap between the groove walls of the inner and outer annular sealing grooves is 1.2mm.
Embodiments of the non-contact seal assembly for a bearing bore of the present invention:
the structure of the sealing assembly provided in this embodiment is the same as that of the sealing assembly in any embodiment of the bearing, and is not described herein again.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all equivalent structural changes made by using the contents of the specification and the drawings of the present invention should be covered by the scope of the present invention.
Claims (9)
1. The non-contact sealing assembly for the inner cavity of the bearing comprises an outer ring sealing assembly fixedly mounted on a bearing outer ring (101) during use and an inner ring sealing assembly fixedly mounted on a bearing inner ring (100) during use, and is characterized in that an inner layer sealing channel and an outer layer sealing channel are formed between the outer ring sealing assembly and the inner ring sealing assembly in the axial direction, and the inner layer sealing channel and the outer layer sealing channel are labyrinth sealing channels.
2. The non-contact seal assembly for a bearing inner cavity according to claim 1, wherein the outer ring seal assembly comprises an outer frame (201) and an outer elastic seal member (302), the inner ring seal assembly comprises an inner frame (200) and an inner elastic seal member (300), the outer layer seal channel is formed between the inner frame and the outer frame, and the inner layer seal channel is formed between the inner elastic seal member and the outer elastic seal member in the axial direction.
3. The non-contact seal assembly for a bearing inner chamber according to claim 2, wherein the inner and outer elastic sealing members are respectively provided with sealing segments extending in an axial direction toward each other, and the sealing segments of the two elastic sealing members are arranged in a staggered and spaced manner in a radial direction to form the inner sealing passage.
4. The non-contact seal assembly for a bearing bore according to claim 2, wherein the inner frame (200) has an inner annular seal groove (203), the outer frame (201) has an outer annular seal groove (202), the notches of the inner and outer annular seal grooves are arranged towards the bearing bore in use, and one of the two annular seal grooves is located in the other one in use, and the outer seal channel is formed between the corresponding walls of the two annular seal grooves.
5. The non-contact seal assembly for a bearing bore of claim 4, wherein one of the inner and outer elastomeric seals is located in an annular seal groove adjacent the side of the bearing bore.
6. A non-contacting seal assembly for a bearing bore according to any one of claims 1 to 5 wherein the seal assembly further comprises a mounting block (400), the inner ring seal assembly being fixedly mounted to the mounting block (400) and the mounting block being mounted, in use, to the bearing inner ring (100).
7. The non-contact seal assembly for a bearing bore according to claim 6, wherein the mounting seat (400) comprises a mounting shaft (401), the inner ring seal assembly being fitted over the mounting shaft (401), one end of the mounting shaft (401) being mounted, in use, on the bearing inner ring (100), and the other end being provided with a stop surface (402) for stop-engaging with the inner ring seal assembly.
8. The non-contact seal assembly for a bearing inner cavity according to any one of claims 1 to 5, wherein at least one of the inner and outer layer seal passages has a large-size section and a small-size section in an extending direction thereof.
9. A bearing comprising a seal assembly, wherein the seal assembly employs the non-contact seal assembly for a bearing bore of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211282705.8A CN115654025A (en) | 2022-10-19 | 2022-10-19 | Non-contact sealing assembly for bearing inner cavity and bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211282705.8A CN115654025A (en) | 2022-10-19 | 2022-10-19 | Non-contact sealing assembly for bearing inner cavity and bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115654025A true CN115654025A (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211282705.8A Pending CN115654025A (en) | 2022-10-19 | 2022-10-19 | Non-contact sealing assembly for bearing inner cavity and bearing |
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| Country | Link |
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| CN (1) | CN115654025A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6682077B1 (en) * | 2001-02-14 | 2004-01-27 | Guy Louis Letourneau | Labyrinth seal for disc turbine |
| CN102190003A (en) * | 2010-03-08 | 2011-09-21 | 阿母斯替德铁路公司 | Railway car bearing seal |
| CN105370890A (en) * | 2014-08-26 | 2016-03-02 | Skf公司 | Low-friction dynamic seal |
| JP2016148382A (en) * | 2015-02-12 | 2016-08-18 | Ntn株式会社 | Sealing device and bearing device for wheel including the same |
| JP2017053452A (en) * | 2015-09-10 | 2017-03-16 | Ntn株式会社 | Wheel bearing device |
| US20170284471A1 (en) * | 2016-03-29 | 2017-10-05 | Uchiyama Manufacturing Corp. | Bearing sealing device |
| JP2020193690A (en) * | 2019-05-30 | 2020-12-03 | 株式会社ジェイテクト | Sealing device and rolling bearing device |
-
2022
- 2022-10-19 CN CN202211282705.8A patent/CN115654025A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6682077B1 (en) * | 2001-02-14 | 2004-01-27 | Guy Louis Letourneau | Labyrinth seal for disc turbine |
| CN102190003A (en) * | 2010-03-08 | 2011-09-21 | 阿母斯替德铁路公司 | Railway car bearing seal |
| CN105370890A (en) * | 2014-08-26 | 2016-03-02 | Skf公司 | Low-friction dynamic seal |
| JP2016148382A (en) * | 2015-02-12 | 2016-08-18 | Ntn株式会社 | Sealing device and bearing device for wheel including the same |
| JP2017053452A (en) * | 2015-09-10 | 2017-03-16 | Ntn株式会社 | Wheel bearing device |
| US20170284471A1 (en) * | 2016-03-29 | 2017-10-05 | Uchiyama Manufacturing Corp. | Bearing sealing device |
| JP2020193690A (en) * | 2019-05-30 | 2020-12-03 | 株式会社ジェイテクト | Sealing device and rolling bearing device |
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