WO2018214848A1 - Ensemble d'étanchéité - Google Patents

Ensemble d'étanchéité Download PDF

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Publication number
WO2018214848A1
WO2018214848A1 PCT/CN2018/087677 CN2018087677W WO2018214848A1 WO 2018214848 A1 WO2018214848 A1 WO 2018214848A1 CN 2018087677 W CN2018087677 W CN 2018087677W WO 2018214848 A1 WO2018214848 A1 WO 2018214848A1
Authority
WO
WIPO (PCT)
Prior art keywords
seal
lip
skeleton
sealing
assembly
Prior art date
Application number
PCT/CN2018/087677
Other languages
English (en)
Chinese (zh)
Inventor
张岳林
刘鑫
Original Assignee
舍弗勒技术股份两合公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 舍弗勒技术股份两合公司 filed Critical 舍弗勒技术股份两合公司
Publication of WO2018214848A1 publication Critical patent/WO2018214848A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members

Definitions

  • This invention relates to sealing techniques.
  • the present invention relates to a seal assembly capable of sealing a bearing, a bearing housing, a gear box, and the like of an apparatus that operates in a harsh environment having a large amount of dust and mud.
  • Figure 1 shows a schematic view of the sealing of a bearing of a conventional roadhead cutting head.
  • the roadheader head uses a plurality of seals such as a floating seal, a V-shaped seal, and an edge seal at different positions for sealing.
  • seals such as a floating seal, a V-shaped seal, and an edge seal at different positions for sealing.
  • a large installation space is required.
  • the respective seals have different mounting positions and mounting methods, it is difficult to install, and it is difficult to ensure that each of the seals can be installed at the correct position, making it difficult to ensure the sealing effect.
  • the cost is also high.
  • Another object of the present invention is to provide a seal assembly which has good wear resistance.
  • a seal assembly for sealing an annular space between an inner surface of a first member and an outer surface of a second member, wherein the first member and the second member Capable of relative rotation, the seal assembly includes a first seal and a second seal, the first seal being fixably mountable relative to an inner surface of the first member, and the second seal being rotatable relative to the first
  • the outer surface of the two members is fixedly mounted, the seal assembly being characterized in that the first seal comprises a skeleton and a plurality of lips connected to the skeleton, wherein the skeleton and the plurality of lips each have a ring shape
  • the plurality of lips including a first lip, and the first lip includes a contact made of metal or ceramic; and the second seal includes a radial extension, wherein assembly of the sealing assembly a state in which a first lip of the first seal extends from the skeleton toward a radial extension of the second seal, and a contact portion of the first lip and a radial direction of
  • the first lip further includes a support portion for supporting the contact portion, and the first lip is connected to the skeleton via the support portion.
  • the skeleton is made of metal
  • the support portion of the first lip is made of an elastic material
  • the first lip is connected to the skeleton by curing of the elastic material.
  • the plurality of lips of the first seal further comprise a second lip and a main lip
  • the second seal further comprises an axial extension, in the assembled state of the sealing assembly, the The second lip and the main lip of the first seal extend from the skeleton toward the axial extension of the second seal and are sealed to each other from the axial extension of the second seal.
  • the second lip and the main lip are spaced apart in the axial direction, wherein any of the second lip and the main lip are disposed on one side of the external environment.
  • the contact portion of the first lip is formed with a plurality of grooves, and the plurality of grooves extend from at least a portion of the radially outer surface of the contact portion to a portion of the axially outer surface of the contact portion.
  • the plurality of grooves are spiral grooves.
  • the plurality of grooves are a unidirectional spiral shape or a bidirectional spiral shape.
  • the second seal is a separate component or the second seal is formed as part of the second component.
  • the second seal is formed as a slinger.
  • the first seal member is in sealing contact with the radially extending portion of the second seal member by the contact portion made of metal or ceramic, and thus has a good performance as compared with the prior art. Anti-wear properties.
  • Figure 1 shows a schematic view of the sealing of a conventional head of a roadhead cutting head. .
  • FIG. 2 shows a schematic view of a portion of a cross section of a seal assembly in accordance with an embodiment of the present invention.
  • FIG 3 shows a perspective view of a portion of a seal assembly in accordance with another embodiment of the present invention.
  • FIG. 4 shows a schematic view of a portion of a cross section of a seal assembly in accordance with yet another embodiment of the present invention.
  • the present invention relates to a seal assembly that is capable of sealing an annular space between an inner surface of a first member and an outer surface of a second member, wherein the first member and the second member are rotatable relative to each other.
  • the seal assembly includes a first seal and a second seal, and the first seal is fixedly mountable relative to an inner surface of the first member, and the second seal is fixedly mountable relative to an outer surface of the second member.
  • the first member may be a box member having an interior space and at least one annular opening
  • the second member may be a shaft member that is at least partially inserted into the annular opening of the box member.
  • first member and the second member may each be a gearbox housing and a shaft that is at least partially inserted into the annular opening of the gearbox housing.
  • first member and the second member may be outer and inner rings of the bearing, respectively.
  • a seal assembly according to an embodiment of the present invention includes a first seal 1 and a second seal 2.
  • the first sealing member 1 includes a skeleton 11 and a plurality of lips connected to the skeleton 11.
  • the first seal 1 further comprises a spring 12.
  • the second seal 2 includes a radially extending portion 21 that extends outward in a radial direction thereof and an axially extending portion 22 that extends in an axial direction thereof.
  • the second seal 2 is formed in the form of a slinger as shown in FIG.
  • the invention is not limited thereto, and the second seal may also be a component of other suitable forms.
  • the slinger 2 can be made of various metals or alloys.
  • FIG. 2 only shows a part (half) of the section of the sealing assembly along the axis of the sealing assembly, actually sealing the various parts of the assembly (the skeleton 11 of the first sealing member 1, the plurality of lips) And the spring 12, as well as the radial extension 21 and the axial extension 22) of the slinger 2, each have an annular shape around the axis of the seal assembly.
  • the skeleton 11 of the first seal 1 includes an axial extension 111 extending substantially in the axial direction of the seal assembly and a radially extending portion 112 extending inwardly generally in the radial direction of the seal assembly.
  • the skeleton 11 can be made of various metals or alloys. Further, the skeleton 11 can also be made of a hard plastic. Of course, the material of the skeleton 11 is not limited thereto, as long as a material capable of providing sufficient supporting strength can be used for the manufacture of the skeleton 11.
  • the plurality of lips of the first seal 1 include at least a first lip 13.
  • the first lip 13 can be arranged to extend outwardly from the skeleton 11 generally along the axial direction of the seal assembly.
  • the axial end 131 of the first lip 13 is made of metal or ceramic.
  • the metal material may specifically include a single metal material such as steel and various alloys.
  • the axial end 131 of the first lip 13 serves as a contact which, in the assembled state of the sealing assembly, is in contact with the radial extension 21 of the slinger 2 to effect a seal.
  • the first lip 13 further includes a support portion 132 for supporting the axial end portion 131, and the first lip 13 is connected to the skeleton 11 through the support portion 132.
  • the support portion 132 is preferably made of an elastic material such as rubber or elastic plastic.
  • the axial end portion 131 of the first lip 13 can be coupled to the support portion 132 by the solidification of the elastic material constituting the support portion 132, and the support portion 132 can be coupled to the skeleton 11, thereby connecting the first lip 13 to Skeleton 11.
  • the axial end portion 131 can also be connected to the support portion 132 by a suitable means such as adhesive.
  • the plurality of lips of the first seal 1 further comprise second lips 14, 15.
  • the second lip 14, 15 may be arranged to extend inwardly from the skeleton 11 generally in a radial direction of the seal assembly. In the assembled state of the seal assembly, the second lip 14, 15 may be in contact with or close to the axial extension 22 of the slinger 2 to effect a seal. Furthermore, the second lip 14, 15 may comprise a plurality of lips (two are shown). The plurality of lips may be in contact with or near the axial extension 22 of the slinger 2 at a plurality of locations in the assembled state of the seal assembly to form a labyrinth seal.
  • the plurality of lips of the first seal 1 also include a main lip 16. Similar to the second lips 14, 15, the main lip 16 is also arranged to extend inwardly from the skeleton 11 generally in the radial direction of the seal assembly. In the assembled state of the seal assembly, the main lip 16 can be in contact with the axial extension 22 of the slinger 2 to form a seal.
  • the spring 12 can be disposed radially outward of the main lip 16. For example, the spring 12 can be caught in a radially outward groove of the main lip 16 to prevent the spring 12 from slipping out of the first seal 1.
  • the spring 12 can press the main lip 16 inwardly in the radial direction of the first seal 1, bringing the main lip 16 into close contact with the axial extension 22 of the slinger 2 to form a good seal.
  • the spring 12 can be made of various metals or alloys.
  • the second lips 14, 15 and the main lip 16 may be made of an elastic material such as rubber or elastic plastic.
  • the second lips 14, 15 and the main lip 16 may be integrally formed from the same material.
  • the second lips 14, 15 and the main lip 16 may each be made of rubber, and both may be integrally joined to the bobbin 11 by curing of the rubber.
  • the support portion 132 of the first lip 13 may be integrally formed with the same material as the second lip 14, 15 and the main lip 16.
  • the support portion 132 and the second lip 14, 15 and the main lip 16 of the first lip 13 may each be made of rubber, and the three may be integrally coupled to the bobbin 11 by curing of the rubber.
  • a bearing housing having an inner space and having at least one annular opening is used as the first member, and a shaft that can be at least partially inserted into the annular opening of the bearing housing is used as the second member.
  • the first member and the second member may also be other similar case members and shaft members, and may also be the outer and inner rings of the bearing.
  • a seal assembly in accordance with the present invention can be assembled between the bearing housing and the shaft to seal an annular space formed between the annular opening of the bearing housing and the shaft.
  • the first seal 1 is fixedly mounted to the inner surface of the end of the bearing housing, and the slinger 2 is fixedly mounted on the sleeve.
  • the first seal 1 may be fitted (interference fit) to the inner surface of the end of the bearing housing by the axial extension 111 of the frame 11, and the axial extension 22 of the slinger 2 may be axially fitted (interference fit).
  • the first seal 1 side faces the inner side of the bearing housing, that is, the bearing side
  • the slinger 2 side faces the outer side of the bearing housing, that is, the outer environment side.
  • the first lip 13 of the first seal 1 extends from the skeleton 11 towards the radial extension 21 of the slinger 2, and the axial end 131 of the first lip 13 and the slinger 2
  • the radially extending portions 21 are in contact with each other to form a seal.
  • the axial end portion 131 of the first lip 13 is made of metal or ceramic
  • the slinger 2 is usually made of metal or alloy.
  • the support portion 132 of the first lip 13 is compressed. Since the support portion 132 is made of an elastic material, it is possible to provide a sufficient elastic force to ensure that the axial end portion 131 of the first lip 13 is in close contact with the radial extension portion 21 of the slinger 2, thereby providing good sealing performance.
  • the second lip 14, 15 of the first seal 1 extends from the skeleton 11 towards the axial extension 22 of the slinger and is in contact with or close to the axial extension 22 of the slinger 2, To form a seal. Furthermore, since the second lip 14, 15 comprises a plurality of lips (two are shown), it can be brought into contact with or close to the axial extension 22 of the slinger 2 at a plurality of locations, thereby forming a labyrinth seal, Further ensure sealing performance.
  • the main lip 16 of the first seal 1 extends from the skeleton 11 towards the axial extension 22 of the slinger 2 and is in contact with the axial extension 22 of the slinger 2 to form a seal. Since the spring 12 presses the main lip 16 toward the axially outward portion 22 of the slinger 2 on the radially outer side of the main lip 16, the main lip 16 can be in close contact with the axial extension 22 of the slinger 2. Therefore, when the bearing is lubricated with liquid oil, it can provide a good seal, prevent leakage of lubricating oil, and further ensure sealing performance.
  • the second lips 14, 15 and the main lip 16 of the first seal member 1 are in contact with or close to the axially extending portion 22 of the slinger 2.
  • the second lip 14, 15 and the main lip 16 of the first seal 1 may be in direct contact with or adjacent to the shaft to form a seal, or the second lip 14, 15 may be in contact with or adjacent to the axial extension 22 of the slinger 2, and The main lip 16 is in direct contact with the shaft to form a seal.
  • a part of the shaft functions as an axial extension 22 of the slinger 2.
  • the seal assembly according to the present invention can form a first seal by contact of the first lip of the first seal with the radially extending portion of the second seal, through the second lip of the first seal and the second seal Contacting or approaching the axial extension forms a second seal and forms a third seal by contact of the main lip of the first seal with the axial extension of the second seal.
  • the seal assembly of the present invention can be used to effect an effective seal.
  • the sealing assembly of the present invention integrates a plurality of portions for realizing a floating ring seal, an edge seal, a labyrinth seal, and an oil seal, and is compact in structure compared with the prior art, which can save installation space and reduce cost. Reduce the installation steps.
  • the first seal member is in sealing contact with each other by a contact portion made of metal or ceramic and a radial extension portion of a second seal member made of metal or alloy or the like and opposed Rotation, therefore, has good wear resistance even in harsh environments such as dust and mud.
  • the first sealing member 1 can also form a plurality of grooves 133 on the axial end portion 131 of the first lip 13.
  • the plurality of slots 133 extend from at least a portion of the radially outer surface of the axial end 131 to a portion of the axially outer surface of the axial end 131.
  • the axially outer surface of the axial end portion 131 is a surface that is in sealing contact with the second seal 2 in the assembled state of the seal assembly.
  • the plurality of grooves 133 can pump dust and mud or the like away from the sealing assembly by centrifugal force when the first sealing member 1 rotates, thereby reducing wear of the sealing assembly and prolonging the life of the sealing assembly.
  • the plurality of grooves 133 may be spiral grooves. Further, the plurality of grooves 133 may be a one-way spiral groove or a two-way spiral groove in consideration of one-way rotation or two-way rotation of the first seal 1. Further, the cross section of the plurality of grooves 133 may be V-shaped, semi-circular, or the like.
  • the second lips 14, 15 and the main lip 16 are spaced apart in the axial direction of the seal assembly, and the second lips 14, 15 are located on the external environment side in the axial direction, and The main lip 16 is located on the bearing side.
  • the present invention is not limited thereto, and the positions of the second lips 14, 15 of the first seal member 1 and the main lip 16 in the axial direction of the seal assembly may be reversed according to actual needs.
  • 4 shows a schematic view of a portion of a cross section of a seal assembly in accordance with yet another embodiment of the present invention. In the embodiment shown in Figure 4, the second lip 14, 15 of the first seal 1 is on the bearing side and the main lip 16 is on the external environment side.
  • the bearing is greased.
  • the second lip 14, 15 is sufficient to seal the grease.
  • the main lip 16 having a better sealing effect can block dust and mud in the external environment from entering the bearing side on the external environment side. This is especially advantageous for sealing in harsh environments with high dust and mud.
  • the second seal is a separate component that can be fixedly mounted relative to the outer surface of the second member, for example, the second seal can be a slinger as described above.
  • the second seal may also be formed as a part of the second member.
  • the second member may be integrally formed with portions that are similar in shape and function to the axial extensions and the radial extensions of the second seal, which portions may contact or abut the corresponding lip of the first seal to form a seal.
  • a portion of the second seal may be formed from a portion of the second member.
  • a portion of the shaft on which the second seal is mounted may be used as part of the axial extension of the second seal.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Sealing Of Bearings (AREA)

Abstract

L'invention concerne un ensemble d'étanchéité utilisé pour sceller un espace annulaire entre une surface intérieure d'un premier composant et une surface extérieure d'un deuxième composant, le premier composant et le deuxième composant pouvant tourner l'un par rapport à l'autre. L'ensemble d'étanchéité comprend un premier élément d'étanchéité (1) et un deuxième élément d'étanchéité (2), le premier élément d'étanchéité (1) pouvant être assemblé de manière fixe par rapport à la surface intérieure du premier composant, et le deuxième élément d'étanchéité (2) pouvant être assemblé de manière fixe par rapport à la surface extérieure du deuxième composant. L'ensemble d'étanchéité est caractérisé en ce que le premier élément d'étanchéité (1) comprend un squelette (11) et de multiples lèvres reliées au squelette (11), le squelette (11) et les multiples lèvres ayant tous une forme annulaire, les multiples lèvres comprenant une première lèvre (13), et la première lèvre (13) comprenant une partie de contact en métal ou en céramique ; et en ce que le deuxième élément d'étanchéité (2) comprend une partie s'étendant radialement (21), où, lorsque l'ensemble d'étanchéité est dans un état assemblé, la première lèvre (13) du premier élément d'étanchéité (1) s'étend depuis le squelette (11) vers la partie s'étendant radialement (21) du deuxième élément d'étanchéité (2), et la partie de contact de la première lèvre (13) scelle et vient en contact avec la partie s'étendant radialement (21) du deuxième élément d'étanchéité (2).
PCT/CN2018/087677 2017-05-24 2018-05-21 Ensemble d'étanchéité WO2018214848A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710374006.9A CN108930794A (zh) 2017-05-24 2017-05-24 密封组件
CN201710374006.9 2017-05-24

Publications (1)

Publication Number Publication Date
WO2018214848A1 true WO2018214848A1 (fr) 2018-11-29

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ID=64395286

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/087677 WO2018214848A1 (fr) 2017-05-24 2018-05-21 Ensemble d'étanchéité

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CN (1) CN108930794A (fr)
WO (1) WO2018214848A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111664253B (zh) * 2019-03-08 2024-02-02 舍弗勒技术股份两合公司 密封装置和轮毂电机驱动系统
CN111750107B (zh) * 2019-03-28 2024-09-03 舍弗勒技术股份两合公司 用于密封装置的骨架和密封装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009257367A (ja) * 2008-04-14 2009-11-05 Nok Corp オイルシール
JP2013002564A (ja) * 2011-06-17 2013-01-07 Ntn Corp 転がり軸受
CN205154917U (zh) * 2015-10-15 2016-04-13 舍弗勒技术股份两合公司 用于轴承的密封结构
CN106151522A (zh) * 2015-03-27 2016-11-23 舍弗勒技术股份两合公司 盒式密封组件及电驱动轴安装结构

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009257367A (ja) * 2008-04-14 2009-11-05 Nok Corp オイルシール
JP2013002564A (ja) * 2011-06-17 2013-01-07 Ntn Corp 転がり軸受
CN106151522A (zh) * 2015-03-27 2016-11-23 舍弗勒技术股份两合公司 盒式密封组件及电驱动轴安装结构
CN205154917U (zh) * 2015-10-15 2016-04-13 舍弗勒技术股份两合公司 用于轴承的密封结构

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