CN109488692A - Combination bearing and seal assembly with common outer main body - Google Patents

Combination bearing and seal assembly with common outer main body Download PDF

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Publication number
CN109488692A
CN109488692A CN201811054973.8A CN201811054973A CN109488692A CN 109488692 A CN109488692 A CN 109488692A CN 201811054973 A CN201811054973 A CN 201811054973A CN 109488692 A CN109488692 A CN 109488692A
Authority
CN
China
Prior art keywords
main body
interior
bearing
sealing element
seal assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201811054973.8A
Other languages
Chinese (zh)
Other versions
CN109488692B (en
Inventor
J.贝克尔
G.P.海恩斯
C.L.克鲁尔
M.毛尔格利亚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SKF AB
Kaydon Ring and Seal Inc
Original Assignee
SKF AB
Kaydon Ring and Seal Inc
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Filing date
Publication date
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Publication of CN109488692A publication Critical patent/CN109488692A/en
Application granted granted Critical
Publication of CN109488692B publication Critical patent/CN109488692B/en
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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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/063—Fixing them on the shaft
    • 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
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7809—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for needle roller bearings
    • 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
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
    • F16C17/045—Sliding-contact bearings for exclusively rotary movement for axial load only with grooves in the bearing surface to generate hydrodynamic pressure, e.g. spiral groove thrust bearings
    • 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
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/02—Sliding-contact bearings
    • F16C29/025—Hydrostatic or aerostatic
    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/581—Raceways; Race rings integral with other parts, e.g. with housings or machine elements such as shafts or gear wheels
    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
    • F16C33/6677—Details of supply of the liquid to the bearing, e.g. passages or nozzles from radial inside, e.g. via a passage through the shaft and/or inner ring
    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6681—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
    • 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
    • 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
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region

Abstract

Combination bearing and seal assembly include outer tubular body, can connect with external member and have the first and second axial end portions, opposite the inner surface and the outer surface and the bearing external roller path on outer body inner surface.Tubulose interior main body is arranged in outer main hole, and can be arranged and can couple with rotating parts around rotating parts.Interior main body has the inner surface and the outer surface, opposite outer axial end portion and interior axial end portion, and interior axial end portion provides approximately radial sealing contact surface, and the bearing inner race on interior body outer surface.The rolling element being arranged between outer rollaway nest and interior rollaway nest is rotationally coupled outer main body and interior main body and forms bearing.Lip ring is located in outer main hole, couples with outer tubular body and has the approximately radial sealing surfaces that can be sealingly engaged with interior main body contact surface.

Description

Combination bearing and seal assembly with common outer main body
Technical field
The present invention relates to bearings and sealing element, more particularly relate to bearing and the sealing of high speed and/or high temperature application Part.
Background technique
Bearing and sealing element are usually with numerous different types and construction it is known that such as sliding bearing, rolling element bearing, bullet Property lippacking, carbon ring seal part etc..When in the application of relatively high speed or/and relatively-high temperature in use, bearing is usually to roll Dynamic element bearing, sealing element is usually sagittal plane sealing carbon ring seal part, effectively to act as under such environmental condition With.In general, individually annular seal assembly be located near bearing assembly, with prevent or at least reduce certain fluids (such as steam, Combustion product etc.) flow into bearing.
Summary of the invention
On the one hand, the present invention is a kind of combination bearing and sealing group for coupling rotatable inner member with external member Part, the inner member can be rotated around central axis.The bearing and seal assembly include: the outer main body of generally tubular, can be with institute External member connection is stated, can be arranged around rotatable inner member.Outer main body has central axis, the first and second axial end portions, phase Pair inner circumferential surface and external peripheral surface, outer body inner surface limits hole, and rolls outside the bearing on outer body inner surface Road.Generally tubular interior main body is arranged in outer main hole, and so as to substantially coaxial with outer main body, the interior main body can surround rotatable Component is arranged and can couple with rotating parts.Interior main body has inner circumferential surface and external peripheral surface and opposite outer axial end Portion and interior axial end portion, interior axial end portion provide approximately radial sealing contact surface.Interior main body also has in interior main body appearance Bearing inner race on face, the interior rollaway nest with outer rollaway nest is substantially axial is aligned.Multiple rolling elements are arranged in the outer rollaway nest Between interior rollaway nest, to be rotationally coupled the outer main body and interior main body and to form bearing.In addition, general toroidal sealing element It is arranged in the outer main hole, is substantially axially located in outer the second axial end portion of main body and interior main body between axial end portion, Couple with outer tubular body and can be arranged around rotatable inner member.The sealing element has approximately radial sealing surfaces, Be configured to sealingly engage with interior main body contact surface, so as to be substantially prevented from fluid outer the second axial end portion of main body and bearing it Between flow.
On the other hand, the present invention be equally a kind of combination bearing for coupling rotatable inner member with external member and Seal assembly, the inner member can be rotated around central axis.Combination bearing and seal assembly include the outer main body of generally tubular, this is outer Main body can connect with external member and can be arranged around rotating parts.Outer main body has opposite inner circumferential surface and excircle Surface, outer body inner surface, which limits hole and has, provides the part of bearing external roller path.The interior main body of generally tubular may be provided at It is arranged in outer main hole and around rotatable inner member, interior main body can couple with inner member, rotate in order to around central axis. Interior main body has inner circumferential surface and external peripheral surface, opposite outer axial end portion and interior axial end portion, longitudinal end in interior main body Approximately radial sealing contact surface is provided.A part of interior main body external peripheral surface is substantially axially aligned simultaneously with bearing external roller path And provide bearing inner race.Multiple rolling elements are arranged between outer rollaway nest and interior rollaway nest, to be rotationally coupled outer main body With interior main body and form bearing.In addition, general toroidal sealing element movably couples with outer main body, it is arranged in outer main hole, So as to axially spaced with interior main body, and can be arranged around rotatable inner member.The sealing element, which has, to be configured to and interior master Approximately radial sealing surfaces that body engages with radially contacting with face seal and when sealing element is arranged around rotating parts with The inner circumferential surface that rotatable inner member is spaced apart radially outwardly.
Detailed description of the invention
When read in conjunction with the accompanying drawings, it is better understood with foregoing summary and the detailed of the preferred embodiment of the present invention is retouched It states.For the purpose of illustrating the invention, currently preferred illustrative examples are shown in the attached drawings.It should be appreciated, however, that this Invention be not limited to shown in accurately arrangement and means.In figure:
Fig. 1 is the section view axial sectional view of the amplification of combination bearing and seal assembly according to the present invention, is shown and machine The inner member of device is connected with external member；
Fig. 2 is the perspective view of combination bearing and seal assembly；
Fig. 3 is the exploded view of combination bearing and seal assembly；
Fig. 4 is the perspective axial sectional view of combination bearing and seal assembly；
Fig. 5 is the axial sectional view of combination bearing and seal assembly；
Fig. 6 is the section view axial sectional view of the amplification of combination bearing and seal assembly；
Fig. 7 is the enlarged drawing of a part of Fig. 6, shows the details of sealing element；
Fig. 8 is the enlarged drawing of a part of Fig. 6, shows the details of bearing；
Fig. 9 is the sectional perspective view by the line 9-9 of Fig. 8；
Figure 10 is the perspective view of the tubulose interior main body of combination bearing and seal assembly；
Figure 11 is the section view axial sectional view of the perspective amplification of tubulose interior main body；
Figure 12 is the perspective view of the sealing element of combination bearing and seal assembly；
Figure 13 is the axial sectional view of the sealing element of combination bearing and seal assembly；
Figure 14 is another view more amplified of a part of Fig. 6, shows the bearing with substitution bearing race parts Details；
Figure 15 is the perspective axial sectional view of the alternative structure of the sealing element of combination bearing and seal assembly, show with outside The separated cartridge seal component of tubular body；And
Figure 16 is the section view axial direction section view of the amplification of the combination bearing and seal assembly of the cartridge seal structure with substitution Figure.
Specific embodiment
Merely for convenience using certain terms in the following description rather than limitation.Word "inner", " inside " and "outside", " outside " is referred respectively to toward and away from the designated centers line of described element or the direction of geometric center, the specific meanings It is apparent from the context of description.In addition, as used herein, word " connection " and " connection " are respectively intended to include two structures Be directly connected between part, therebetween without being indirectly connected between any other component and component, therebetween inserted with one or Other multiple components.Term includes the word of the word being above specifically mentioned, its derivative words and similar meaning.
Now referring in detail to attached drawing, wherein identical number is for indicating identical element, as illustrated in figs. 1-16, built-up shaft It holds and is used to couple rotatable inner member 1 (such as axis) and external member 2 such as shell, frame etc. with seal assembly 10, inner member 1 It can be around central axis ACRotation.Rotating parts 1 are preferably axis 3 (or sleeve/slideway on axis 3), are most preferably arranged High-speed engine shaft in the frame or shell 2 of machine 4, such as combustion gas turbine, steam turbine, compressor or similar device. In addition, axis 3 and bearing and seal assembly 10 respectively are preferably configured to operate in the environment of relatively-high temperature, it is greater than The environmental condition of 100 degrees Celsius (100 DEG C).Bearing and seal assembly 10, which consist essentially of, can connect with external member 2 and can surround The outer main body 12 of the generally tubular that rotatable inner member 1 is arranged is arranged in outer main body 12 and can surround what rotating parts 1 were arranged Generally tubular interior main body 14, the multiple rolling elements 16 being arranged between interior main body 12 and outer main body 14 and setting are in outer main body And it can be around " axial face " sealing element 18 of the setting of rotating parts 1 in 12.
More specifically, outer tubular body 12 be respectively provided with central axis 13, first and second axial end portion 12a, 12b and Opposite internal and external circumference surface 20,22 respectively, inner surface 20 limit hole 24.Outer main body 12 also has on outer body inner surface 20 Bearing external roller path 26 is preferably provided by a part of outer body inner surface 20.Alternatively, outer rollaway nest 26 can be by being arranged in The inner circumferential surface 38a of annular body 38 in hole 24 is provided, as shown in figure 14.In addition, outer tubular body 12 be configured to outside Component 2 is fixedly connected, so as to relative to axis center axis ACIt is non-rotatable.When outer main body 12 is arranged around inner member/axis 3, Outer main body axis 13 at least substantially with the axis A of axisCCollinearly.
Tubulose interior main body 14 is arranged in outer main hole 24, so as to substantially coaxial (in being with axis 13 with outer main body 12 The heart), and can couple with rotatable inner member 1, in order to around central axis ACRotation (i.e. during axis 3 rotates).Interior main body 14 are respectively provided with inner circumferential surface 30 and external peripheral surface 32 and opposite respectively outer axial end portion 14a and interior axial end portion 14b.Outer axial end 14a generally axially provides approximately radial close adjacent to outer main body first axis end 12a, interior longitudinal end 14b Seal contact surface 34.The size of the inner surface 30 of tubulose interior main body 14 be preferably designed so that with the external peripheral surface 3a of axis 3 (or set The outer surface of cylinder/slideway (not shown)) it is frictionally engaged, tubulose interior main body 14 to be rotationally coupled with inner member 1 and close Seal the interface (not shown) between interior main body 14 and component/axis 3.In addition, tubulose interior main body 14 has on interior body outer surface 32 There is a bearing inner race 36, interior rollaway nest 36 is positioned to and outer rollaway nest 26 is substantially axial is aligned and (is aligned along axis 13).Preferably, Interior rollaway nest 36 is provided by a part of interior main body external peripheral surface 32, but the annular body that can also be arranged by surrounding interior main body 14 39 external peripheral surface 39a provides (Figure 14).
In addition, multiple rolling elements 16 are arranged between interior rollaway nest 26 and outer rollaway nest 36, to be rotationally coupled outer master Body 12 and interior main body 14 simultaneously form bearing 15.Each rolling element 16 is preferably cylindrical roller 17, but can also be formed as Pearl, needle, conical roller or any other type rolling element (alternative solution is not shown).Preferably, bearing and sealing group Part 10 further includes bearing retainer 40, is configured to keep rolling element 16 as described below, but can also be in no retainer Or it is formed in the case where other holding meanss.
In addition, sealing element 18 is arranged in outer main hole 24, to be substantially axially located at outer the second axial end portion of main body In 12b and interior main body between axial end portion 14b.Sealing element 18 has opposite interior axial end portion 18a and outer axial end portion 18b, And it is connect with outer tubular body 12, so as to substantially cannot be around axis ACRotation.In addition, sealing element 18 is in interior axial end portion There are approximately radial sealing surfaces 42 on 18a, sealing surfaces 42 are configured to sealingly engage with interior main body contact surface 34, with Just it is at least substantially prevented from fluid to flow between outer main body the second axial end portion 12b and bearing 15, especially by sealing element 18 Interface SI between main body 14.Above-mentioned primary element has been described, combination bearing and close is described more fully These and other components of sealing assembly 10.
- 9 and 14-16 referring to Fig.1, outer tubular body 12 is usually circular, but preferably in the axial direction D1On (Fig. 1) It is approximately radial inwardly tapered from first axis end 12a to the second axial end portion 12b.Outer tubular main body 12 is preferably formed to Individual construction is single whole, but can also be formed by the tubular body portion (not shown) of multiple connections.Preferably, multiple convex Ear 44 is located at main body first axis end 12a and nearby and from outer surface 22 extends radially outwardly and around central axis 13 weeks To be spaced apart.Lug 44 can be engaged with external member 2 with bearing and the seal assembly 10 of being permanently connected, as shown in Figure 1, although outer main Body 12 is also provided with radial flange or any other structure appropriate, so as to connect with second component 2.
In addition, outer main body 12 preferably has annular shoulder 46, radially-inwardly from the rest part of body inner surface 20 Extend and is located near the second axial end portion 12b.Shoulder 46 has the inner circumferential surface 47 that can be engaged by sealing element 18, preferably The auxiliary sealing member 78 that ground is arranged by surrounding sealing element 18, as described below.Alternatively, outer main body 12, which can be formed without, appoints What shoulder, but the part 20a of inner surface 20 can be engaged by cartridge seal part 90, be retouched as shown in figs and below It states.For preferred shoulder 46, outer main body 12 preferably further includes extending radially inwardly from outer the second axial end portion of main body 12b Annular retainer flange 48, and radial holding surface 49 is provided for biasing member 86, such as it is discussed further below.
Referring now to Fig. 1-11 and 14-16, it is generally circular, axial length L that tubulose interior main body 14, which is preferably also,AIAbout The axial length L of outer main body 12AOHalf, as shown in Figure 5.As outer main body 12, tubulose interior main body 14 is also preferably formed It is for single-piece or individually whole, but can also be formed by the tubular body portion of multiple connections.Interior main body 14, which has, radially outward prolongs The shoulder 50 stretched, it is adjacent with axial end portion 14b in main body, to increase the radial width of axial end portion 14b, to increase sealing The surface area of contact surface 34.Preferably, multiple grooves 52 are extended axially inwardly from sealing contact surface 34, and each is matched It is set to when rotating parts 1 are around central axis ACAxialy offset power is generated when rotation on sealing element 18, so that sealing surfaces 42 It is axially spaced with interior main body contact surface 34.
More specifically, when tubulose interior main body 14 surrounds central axis AC(rotating parts 1 are used) when rotation into recessed The fluid of slot 52 becomes to pressurize and is guided to abut against sealing surfaces 42, so that sealing element 18 is axially displaced away from contact table Face 34, to reduce the friction of (and preferably temporary elimination) between sealing element 18 and tubulose interior main body 14.Preferably, in order to It further decreases in friction, the especially transition between static and dynamic condition, it can be in the contact table of interior tubular body 14 Wear-resistant coating is set on face 34.
Preferably, interior rollaway nest 36 and the rest part of the external peripheral surface 32 of interior tubular body 14 are spaced radially inwardly. In this way, two support surfaces 54a, 54b be limited to respectively it is each adjacent with individual axial end 36a, 36b of interior rollaway nest 36, Spring bearing retainer 40, as detailed further below.In addition, interior main body 14 preferably has multiple axial grooves 56, Its axial end portion 14a outside interior main body extends and extends radially outwardly from body inner surface 30.At least one and preferably Between one in multiple each comfortable main body inner circumferential surfaces 30 of radial direction lubrication channel 58 and two support surface parts 54a, 54b Substantially radially extend, preferably extends from an individual axial groove 56.In this way, into axial groove 52 lubricant by from Mental and physical efforts are radially outwardly through radial passage 56, subsequently into the space between support surface 54a, 54b and retainer 40, to work as Retainer 40 lubricates retainer 40 when sliding mobile on support surface 54a, 54b and rolling element 16.
Referring to Fig. 3, Fig. 8 and Fig. 9, bearing retainer 40 be generally disposed at outer tubular member 12 and inner tubular member 14 it Between, and be configured to " loosely " keep multiple rolling elements 16.Retainer 40 includes inner circumferential surface 41A and external peripheral surface 41B and multiple openings 43 radially extended between surface 41A, 41B, each opening are preferably formed to substantially rectangular Depression, as in Fig. 3 best seen from.Individual one in multiple rolling elements 16 is arranged in each retainer opening/depression In 43, so that when each rolling element 16 is rolled simultaneously on raceway 26,36 and rotated in associated pocket 43, retainer 40 around central axis ACAngularly shift.In addition, as described above, bearing retainer 40 surrounds two interior main body support surface portions Divide 54a, 54b setting, so that when retainer 40 surrounds axis ACWhen angularly shifting, retainer inner surface 41A is along surface 54a, 54b sliding.
Referring now to Fig. 1-9 and Figure 12-14, sealing element 18 preferably includes generally circular annular body 60, has Opposite outer axial end portion 60a and interior axial end portion 60b, inner end 60b provide sealing surfaces 42 and 62 He of inner circumferential surface External peripheral surface 63.Annular body 60 is preferably single structure, but also may include being joined together to form main body 60 multiple individual segmental arc (not shown).The size of seal body 60 to be arranged when sealing element 18 around component/axis 1 When sealing element inner surface 62 be spaced apart radially outwardly with rotating parts 1, as shown in Figure 1, with eliminate sealing element 18 with it is rotatable Any friction between 1/ axis 3 of component.In addition, shoulder 64 is from the adjacent with axial end portion 60b in sealed body of inner surface 62 Rest part extends radially inwardly, to increase the radial width of inner end 60b, to increase the surface area of sealing surfaces 42.It is excellent Selection of land, annular flange 65 extend radially outwardly from body outer surface 63, and including multiple axial grooves 66, are each configured to receive connection Device 70 is connect, as described below.Seal body 60 is preferably formed by carbon material, but can also be by ceramic material, high temperature polymer Material or any other material appropriate are formed.
Preferably as shown in Fig. 1 and 3-7, combination bearing and seal assembly 10 preferably further include at least one and preferably Multiple connectors 70 are each configured to outer tubular body 12 movably couple sealing element 18.In this way, sealing element 18 can be It is axially displaced in outer main hole 24, and relative to central axis ACIt is non-rotatable；That is, connector 70 prevents sealing element 18 around axis ACAngular displacement.Each connector 70 preferably includes elongated pin 72, has the first end being arranged in outer body shoulder 46 The portion 72a and the second end 72b being arranged in one of sealing flange axial groove 69.Connector pin 72 and 68 phase interaction of sealing flange To basically prevent the angular displacement of sealing element 18, but slot 69 allows sealing element 18 to slide axially along pin 72.Although connector Pin 70 is presently preferred, but combination bearing and seal assembly 10 can have any other structure or component also with removable Ground couples sealing element 18 with outer tubular main body 12, an alternative solution is shown in Figure 15 and 16, as described below.
Referring still to Fig. 1 and Fig. 3-7, bearing and seal assembly 10 preferably further include for preventing fluid in sealing element 18 The auxiliary sealing member 78 flowed between outer tubular main body 12.Auxiliary sealing member 80 is preferably included around the setting of sealing element 18 Annular body 80, and be configured to usually seal between sealing element 18 and outer tubular main body 12, to prevent fluid from sealing It is flowed between part outer surface 63 and tubular body inner surface 20.Preferably, seal body 60 have from outer surface 63 it is radial to The annular groove 82 of interior extension, and auxiliary seal main body 80 is O-ring, is arranged in groove 82 and is configured to support to external seal The inner surface portion 47 of outer body shoulder 46.However, auxiliary sealing member 78 can construct in any other suitable way, example Integral part (such as flange) as being directly sealed against the seal body 60 of shoulder inner surface 47.
Referring again to Fig. 1 and Fig. 3-7, bearing and seal assembly 10 preferably also comprise at least one biasing member 86, Being configured to keeps sealing element 18 substantially axial biases towards interior main body sealing contact surface 34.More specifically, biasing member 86 is preferred Ground includes waveform spring 88 and is arranged between the outer axial end portion 60a of sealing and outer body holder flange 48.Waveform spring 88 are partly compressed between body end 60a and retainer flange 48, to tend to towards tubulose interior main body 14 Other direction D2" promotion " or axial movement seal body 60 on (Fig. 1).Alternatively, biasing member 86 may include one or Multiple coil compression springs or any other the suitable component for capableing of axialy offset sealing element 18.
Under any circumstance, biasing member 86 is used to ensure seal body sealing surfaces 42 in component 10 and machine 3 Holding and 34 juxtaposition of sealing contact surface under stationary state, i.e., when 1/ axis 3 of inner member is irrotational, to prevent fluid close It is flowed in seal interface SI between sealing 18 and interior tubular body 14.However, in the tubulose of rotating parts/axis 1 and connection Interior main body 14 surrounds central axis ACUnder rotation or the dynamical state angularly shifted, the groove in interior main body contact surface 34 Fluid pressurization and guidance in 52 couples of interface S1, so that seal body 60 is displaced away from tubular body 14, to reduce friction. Although some fluids pass through seal interface SI in a dynamic condition, substantially reducing for friction substantially increases the sealing longevity Life, this is considered, and than entirely preventing or interrupting fluid, to flow through interface SI more important.
Referring now to Figure 15 and 16, sealing element 18 can also be provided by cartridge seal component 90, and cartridge seal component 90 also wraps Outer seal case 92 and external peripheral surface 93 are included, outer seal case 92 has inner cavity C at least partly comprising sealing element 18H。 Preferably, seal casinghousing outer surface 93 can be frictionally engaged with a part of outer body inner surface 20, by cartridge seal component 90 are maintained in outer tubular body 12, although C clamp 94 is also preferably arranged to engage with outer main body 12 and shell 92 with axial direction Keep boxlike sealing element 19.In addition, shell 92 is preferably approximately C-shaped, and has and the external annular section of outer surface 93 is provided The 92a and internal annular section 92b and radial component 92c for connecting outer portion 92a and inner part 92b.
Preferably, at least one and preferably two fixed anti-rotation lugs 96 are respectively rigidly attached to shell outer ring The inner surface of part 92a and engaged with the mating groove (not shown) in seal body 60 with prevent sealing element 18 angle position It moves.It is arranged between seal body 60 and shell internal annular section 92b in addition, interior auxiliary sealing member 98 is preferably O-ring. Biasing member 86 is preferably provided in shell 92 and between casing annular part 92c and seal body outer end 60b It is compressed.In this way, biasing member 86 biases seal body 60 towards tubulose interior main body 14, so that main body 60 slides against admittedly Fixed anti-rotation lugs 96 and on interior auxiliary sealing member 98, and basically prevent fluid and flow through shell 92 and sealing element 18。
It will be understood by those skilled in the art that in the case where not departing from its extensive inventive concept, it can be to above-mentioned implementation Example is changed.It will be understood, therefore, that the present invention is not limited to disclosed specific embodiments, and it is intended to be covered on appended right The modification in the spirit and scope of the present invention generally defined in it is required that.

Claims (11)

1. a kind of combination bearing and seal assembly for coupling rotatable inner member with external member, the inner member can be in The rotation of mandrel line, the bearing and seal assembly include:
The outer main body of generally tubular, can connect with the external member, can surround rotatable inner member be arranged and have central axis, First and second axial end portions, opposite inner circumferential surface and external peripheral surface, outer body inner surface limits hole, and leads outside Bearing external roller path on internal surface；
Generally tubular interior main body is arranged in outer main hole, and so as to substantially coaxial with outer main body, the interior main body can surround can Rotating member is arranged and can couple with rotating parts, and has inner circumferential surface and external peripheral surface, opposite outer axial direction End and interior axial end portion, interior axial end portion provide approximately radial sealing contact surface, and on interior body outer surface Bearing inner race, the interior rollaway nest with outer rollaway nest is substantially axial is aligned；
Multiple rolling elements, be arranged between the outer rollaway nest and interior rollaway nest, so as to be rotationally coupled the outer main body and Interior main body simultaneously forms bearing；And
General toroidal sealing element, be arranged in the outer main hole, substantially axially be located at outer the second axial end portion of main body and In interior main body between axial end portion, couples with outer tubular body and can be arranged around rotatable inner member, which has Approximately radial sealing surfaces are configured to sealingly engage with interior main body contact surface, lead outside to be substantially prevented from fluid It is flowed between the second axial end portion of body and bearing.
2. combination bearing as described in claim 1 and seal assembly, in which:
The outer rollaway nest is provided by a part of outer body inner surface or is led outside by being arranged the inner circle of intracorporal annular body Perimeter surface provides；And
The interior rollaway nest is by a part offer by body outer surface or the outer circle of the annular body by being arranged around interior main body Perimeter surface provides.
3. combination bearing as described in claim 1 and seal assembly, in which:
The external peripheral surface of the outer main body of said inner tube shape, which has, provides the surface portion of the interior rollaway nest, raceway surface parts tool There are two axially opposite end and two shoulder surface portions, each shoulder surface portions and raceway surface parts are axial Individual one in end is spaced apart radially outwardly；And
The combination bearing and seal assembly further include general toroidal bearing retainer, which can surround two shoulders Surface portion is slidably arranged, and including multiple openings radially extended, the individual setting in multiple rolling elements In each retainer opening.
4. combination bearing as claimed in claim 3 and seal assembly, wherein said inner tube shape main body is at least one lubrication Channel, the lubrication channel are generally radially extending between one in interior main body inner circumferential surface and two shoulder surfaces.
5. combination bearing as described in claim 1 and seal assembly, wherein the outer tubular body is configured to and the outer structure Part is fixedly connected, so as to non-rotatable relative to the central axis.
6. combination bearing as described in claim 1 and seal assembly, further include at least one of the following:
At least one connector is configured to outer main body movably couple sealing element, so that sealing element can be in outer main body It is moved axially in hole and non-rotatable relative to central axis；
Biasing member, being configured to keeps sealing element substantially axial biases towards interior main body sealing contact surface；
Auxiliary sealing member including annular body is arranged around sealing element and is configured to substantially be sealed in sealing element and outer tube Between shape main body；And
General toroidal bearing retainer is generally disposed between outer tubular member and inner tubular member and including multiple radial directions The opening of extension, the individual setting in multiple rolling elements is in each retainer opening.
7. combination bearing as described in claim 1 and seal assembly, wherein the sealing element has inner circumferential surface, described Sealing element is sized so that sealing element inner circumferential surface and rotatable structure when sealing element is around rotating parts setting Part is spaced apart radially outwardly.
8. combination bearing as described in claim 1 and seal assembly, wherein at least one of the following:
The sealing element includes one in general toroidal main body and multiple arcs section；And
The sealing element is formed by one of carbon material, ceramic material and high temperature polymer materials.
9. combination bearing as described in claim 1 and seal assembly, wherein the sealing element is provided by cartridge seal part, institute Stating cartridge seal part further includes outer seal case, and the outer seal case has inner cavity at least partly comprising the sealing element External peripheral surface with that can engage with a part of outer body inner surface, is maintained at outer tubular body for cartridge seal component It is interior.
10. combination bearing as described in claim 1 and seal assembly, wherein at least one of the following:
Said inner tube shape main body has multiple grooves, and the groove is extended axially inwardly from sealing contact surface, and is configured to Axialy offset power is generated on sealing element when rotating parts are rotated around central axis, so that sealing surfaces and contact surface It is axially spaced；And
Wear-resistant coating is arranged on the sealing contact surface of interior tubular body.
11. combination bearing as described in claim 1 and seal assembly, wherein in said inner tube shape main body and outer tubular main body Each include one in the tubular body portion of single tubular body and multiple connections.
CN201811054973.8A 2017-09-11 2018-09-11 Combined assembly comprising a bearing and a seal having a common outer body Active CN109488692B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102017000101128 2017-09-11
IT102017000101128A IT201700101128A1 (en) 2017-09-11 2017-09-11 ASSEMBLY OF BEARING AND GASKET IN COMBINATION WITH COMMON EXTERNAL BODY

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CN109488692B CN109488692B (en) 2022-02-18

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DE (1) DE102018214217A1 (en)
FR (1) FR3071019B1 (en)
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CN85107199A (en) * 1985-09-26 1987-04-08 埃默森电气公司 Bearing unit
CN1369653A (en) * 2001-02-01 2002-09-18 Skf公司 Precision spindle parts having low friction performance
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CN105626683A (en) * 2011-08-03 2016-06-01 日本精工株式会社 Rolling bearing with seal ring
CN203939878U (en) * 2014-05-30 2014-11-12 宁波市镇海银球轴承有限公司 A kind of four-point contact ball
CN204477090U (en) * 2015-02-09 2015-07-15 宁波市镇海银球轴承有限公司 A kind of note counter deep groove ball bearing
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Publication number Publication date
FR3071019B1 (en) 2021-01-22
DE102018214217A1 (en) 2019-03-14
IT201700101128A1 (en) 2019-03-11
FR3071019A1 (en) 2019-03-15
CN109488692B (en) 2022-02-18

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