CN108087556A - Box type sealing structure - Google Patents
Box type sealing structure Download PDFInfo
- Publication number
- CN108087556A CN108087556A CN201611037372.7A CN201611037372A CN108087556A CN 108087556 A CN108087556 A CN 108087556A CN 201611037372 A CN201611037372 A CN 201611037372A CN 108087556 A CN108087556 A CN 108087556A
- Authority
- CN
- China
- Prior art keywords
- lip
- component
- skeleton
- seal structure
- cartridge seal
- 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
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 41
- 239000000428 dust Substances 0.000 claims abstract description 57
- 238000005119 centrifugation Methods 0.000 claims description 39
- 230000004308 accommodation Effects 0.000 claims description 26
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000003068 static effect Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 18
- 239000003344 environmental pollutant Substances 0.000 description 10
- 231100000719 pollutant Toxicity 0.000 description 10
- 239000000314 lubricant Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000005086 pumping Methods 0.000 description 7
- 239000011521 glass Substances 0.000 description 6
- 238000005452 bending Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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
- F16J15/322—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip supported in a direction perpendicular to the 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
- 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
- F16C33/762—Sealings of ball or roller bearings by means of a fluid
- F16C33/763—Sealings of ball or roller bearings by means of a fluid retained in the sealing gap
- F16C33/766—Sealings of ball or roller bearings by means of a fluid retained in the sealing gap by pumping action
-
- 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
- F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
- F16C33/7823—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of sealing 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
- 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
- F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
- F16C33/7873—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section
- F16C33/7876—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section with sealing 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
- 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
- F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
- F16C33/7879—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring
- F16C33/7883—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring mounted to the inner race and of generally L-shape, the two sealing rings defining a sealing with box-shaped cross-section
-
- 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
- F16C33/80—Labyrinth sealings
- F16C33/805—Labyrinth sealings in addition to other sealings, e.g. dirt guards to protect sealings with sealing 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
- 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
- F16J15/3216—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip supported in a direction parallel to the 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
- F16J15/3244—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with hydrodynamic pumping action
-
- 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
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
-
- 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
- F16J15/44—Free-space packings
- F16J15/447—Labyrinth packings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Sealing Devices (AREA)
Abstract
The invention relates to the field of sealing, in particular to a box type sealing structure. The box-type sealing structure is annular as a whole and comprises: a dust ring; the framework and the dustproof ring form an accommodating space, and the framework is provided with an air inlet communicated with the accommodating space; and at least one centrifugal lip portion which is arranged on the framework and extends out of the framework to be abutted against the dustproof ring. When the first member and the second member are relatively rotated, the air flow flowing into the accommodating space from the air intake hole of the frame can separate the at least one centrifugal lip from the dust-proof ring by a predetermined interval and the air flow can flow out of the cassette seal structure from the interval. Thus, the present invention provides a cartridge type seal structure capable of providing a good static seal and dynamic seal for a rotating assembly by the seal of the seal lip and the air seal.
Description
Technical field
The present invention relates to field of sealing technology, the boxlike of the sealing between the component that can be relatively rotated is more particularly related to
Sealing structure.
Background technology
The main shaft and bearing of glass machine now often work and in harsh environment by vapor, fog and glass dust
End surrounds, and so main shaft and bearing is protected just to seem extremely important.In the prior art, bearing is mounted on the interior of glass machine
And main shaft and bearing are sealed using labyrinth seal and air impervious mode.When glass machine works, extraneous air leads to
Specific access is crossed to continue into the interior of installation bearing and will accumulate in main shaft and bearing by stable air pressure
External vapor, fog and glass powder blowout.In addition, the labyrinth seal with labyrinth can also prevent pollutant into
Enter above-mentioned interior, enabling external contaminants is effectively made away from above-mentioned room by labyrinth seal and aeroseal.
But labyrinth seal is difficult to pass through its own in the case where aeroseal does not work in above-mentioned scheme
Structural defence main shaft and bearing.In the case of the air pressure of input unstable or powerless (even zero), vapor, mist
Gas and glass powder will be easily accessible in above-mentioned room so that sealing effect substantially reduces.
The content of the invention
The defects of based on the above-mentioned prior art and made the present invention.The goal of the invention of the present invention is to provide a kind of boxlike
Sealing structure can overcome and lose work in aeroseal including labyrinth seal and air impervious sealing structure in the prior art
The problem of sealing effect reduces in the case of.
In order to realize above-mentioned goal of the invention, the present invention adopts the following technical scheme that.
The present invention provides a kind of following cartridge seal structures, are used for the first component that can be relatively rotated and second
The sealing of component, the cartridge seal structure is integrally annular in shape, and the cartridge seal structure includes：Dust ring, the dust ring
For being fixed on the first component；Skeleton, the skeleton for being fixed on the second component, the skeleton with it is described dust-proof
Accommodation space is formed between ring, the skeleton is formed with the air admission hole connected with the accommodation space；And at least one centrifugation
Lip, at least one centrifugation lip are arranged at the skeleton and extend from the skeleton to be abutted with the dust ring,
And at least one centrifugation lip is configured to：When the first component and the second component relatively rotate, from institute
At least one centrifugation lip and the dust ring point can be made by stating the air-flow of the air admission hole inflow accommodation space of skeleton
The cartridge seal structure can be flowed out from predetermined space and the air-flow from the interval.
Preferably, the skeleton includes fixing for outer skeleton fixed with the second component and with the outer skeleton
Inner frame, the outer skeleton is formed with the air admission hole, and the inner frame has the inner frame footpath radially extended
To part, the accommodation space is separated into the first space to communicate with each other and second space, institute by the inner frame radial component
The air admission hole that the first space is stated with the outer skeleton connects, and the second space is connected with the external of the cartridge seal structure,
At least one centrifugation lip is arranged at the inner frame radial component and in the second space from the inner frame footpath
To partly extending to be abutted with the dust ring.
It is highly preferred that the dust ring has the dust ring radial component radially extended, at least one centrifugation
Lip is abutted with the dust ring radial component, and in the dust ring radial component and at least one centrifugation lip
At the position of abutting, the dust ring radial component is provided with multiple eccentric grooves approximately along circumferentially extending.
It is highly preferred that the multiple eccentric groove includes the first eccentric groove, circumferential one end of first eccentric groove is located at should
The radial outside of the circumferential other end of first eccentric groove, at least a portion for including described circumferential one end of first eccentric groove
Width be gradually reduced towards the circumferential direction one end.
It is highly preferred that the multiple eccentric groove further includes the second eccentric groove, the circumferential other end position of second eccentric groove
Radial outside in circumferential one end of second eccentric groove, include the circumferential other end at least the one of second eccentric groove
Partial width is gradually reduced towards the circumferential direction other end.
Preferably, the cartridge seal structure further includes secondary lip, and the pair lip is arranged at the skeleton and from described
Skeleton extends for being abutted with the first component, and the secondary lip is configured to：When the first component and institute
When stating second component relative rotation, the air-flow of the accommodation space is flowed into from the air admission hole of the skeleton can make the secondary lip
Predetermined space is separated with the first component.
It is highly preferred that in the secondary lip at the position that is abutted with the first component, the secondary lip setting
There are the multiple pump oil slots for axially extending and/or compared with axially inclined extending, the pump oil slot is in the secondary lip
Opening at axially inner side ora terminalis, the pump oil slot are not open at the axially external ora terminalis of the secondary lip.
It is highly preferred that in the secondary lip at the position that is abutted with the first component, the secondary lip setting
There are multiple semicircular slots, the both ends of the semicircular slot opening, the semi-ring at the axially inner side ora terminalis of the secondary lip
Shape slot is not open at the axially external ora terminalis of the secondary lip.
Preferably, at the position of the formation air admission hole of the skeleton, the skeleton is provided with circumferentially complete cycle
Recess for forming additional air accommodation space between the skeleton and the second component.
The sealing of following runner assembly can be used for using the cartridge seal component of above-mentioned concrete structure：The runner assembly
The first component and can be arranged at including the first component that can be relatively rotated and second component and cartridge seal structure
The gap between first component and second component is sealed between two components.Above-mentioned runner assembly can be shaft assembly or bearing
Deng.In the case where runner assembly is shaft assembly, first component can be axis, and second component can be shell；In runner assembly
In the case of bearing, first component can be bearing inner race, and second component can be bearing outer ring.
By using above-mentioned technical solution, the present invention provides a kind of cartridge seal structure, which leads to
Good static sealing and dynamic sealing can be provided for runner assembly by crossing the sealing of sealed lip and aeroseal, and i.e.
Make the sealing of the sealed lip in the case where aeroseal does not work can also play good sealing effect.In addition the boxlike
The sealed lip of sealing structure is not contacted when runner assembly works with dust ring or runner assembly, thus is not easy to wear away, and is increased
Service life.
Description of the drawings
Fig. 1 a are the broken sections for the shaft assembly for being equipped with cartridge seal structure according to the first embodiment of the invention
Stereoscopic schematic diagram；Fig. 1 b are the schematic diagrames for the section for showing the shaft assembly in Fig. 1 a；Fig. 1 c are the offices of the upper portion of Fig. 1 b
Portion's enlarged diagram.
Fig. 2 is the stereoscopic schematic diagram of the outer skeleton of the cartridge seal structure in Fig. 1 a.
Fig. 3 is the schematic front view of the dust ring of the cartridge seal structure in Fig. 1 a.
Fig. 4 is the stereoscopic schematic diagram of the secondary lip of the cartridge seal structure in Fig. 1 a.
Fig. 5 is the upper portion for the shaft assembly for being equipped with cartridge seal structure second embodiment of the invention
Close-up schematic view.
Fig. 6 is the stereoscopic schematic diagram of the outer skeleton of the cartridge seal structure in Fig. 5.
Fig. 7 is the schematic front view of the dust ring of the cartridge seal structure in Fig. 5.
Fig. 8 is the stereoscopic schematic diagram of the secondary lip of the cartridge seal structure in Fig. 5.
Fig. 9 is the upper portion of the shaft assembly for the cartridge seal structure for being equipped with the 3rd embodiment according to the present invention
Close-up schematic view.
Figure 10 is the schematic front view of the dust ring of the cartridge seal structure in Fig. 9.
Figure 11 is the stereoscopic schematic diagram of the secondary lip of the cartridge seal structure in Fig. 9.
Reference sign
Outside 1 axis, 2 21 first air admission hole of shell, 3 cartridge seal structure, 31 outer 311 outer skeleton axial component 312 of skeleton
321 inner frame axial component of skeleton radial component 313 second air admission hole, 32 inner frame, 322 inner frame radial component 33 is anti-
331 dust ring axial component of dirt ring, 332 dust ring radial component, 333 first eccentric groove, 334 second eccentric groove 34 centrifuges lip
The secondary 353 pump oil slot of lip radial component of the secondary lip axial component 352 of secondary lip 351 of portion 35
The 2 additional air accommodation spaces of second space S3 of the first space Ss of A axial direction R radial direction C circumferential directions S1
Specific embodiment
Illustrate the specific embodiment of the present invention hereinafter with reference to Figure of description.In the accompanying drawings, mark represented by A
" axial direction " is the axial direction of shaft assembly (cartridge seal structure)；It is shaft assembly (cartridge seal structure) to mark " radial direction " represented by R
Radial direction；Mark the circumferential direction that " circumferential direction " represented by C is shaft assembly (cartridge seal structure).It is unless otherwise stated, axial
Inside refers to the left side in Fig. 1 b, Fig. 1 c, Fig. 5 and Fig. 9, and the axially external right side referred in Fig. 1 b, Fig. 1 c, Fig. 5 and Fig. 9.Grease
Deng lubricant medium be present in the pollutant of the axially inner side of cartridge seal structure, dust, steam etc. and be present in cartridge seal knot
Structure it is axially external.
Cartridge seal structure according to the present invention can be used for the runner assembly for including can relatively rotate two components
Sealing.Illustrate the specific reality of the present invention using shaft assembly as the sealed object of cartridge seal structure according to the present invention below
Apply mode.As described above, shaft assembly for the example and shaft assembly of runner assembly include the axis that can relatively rotate and
Shell and shell are located at the position of axis, and axis is the first component of runner assembly, and shell is the of runner assembly
Two components.
(first embodiment)
As shown in Fig. 1 a to Fig. 1 c, cartridge seal structure 3 according to the first embodiment of the invention is installed on being capable of phase
Axis 1 and shell 2 and the cartridge seal structure 3 to rotation is whole annular in shape.In the present embodiment, the cartridge seal structure
3 include skeleton (outer skeleton 31 and inner frame 32), dust ring 33, centrifugation lip 34 and secondary lip 35, middle skeleton (outer skeleton
31) space surrounded with dust ring 33 is accommodation space.
In the present embodiment, skeleton includes the outer skeleton 31 being fixed to one another and inner frame 32.
Outer skeleton 31 has the axially outer skeleton axial component 311 of A extensions and the axis from outer skeleton axial component 311
The outer skeleton radial component 312 that inside side end extends along radial direction R to radially inner side.Outer skeleton axial component 311 is fixed on
The shell 2 of shaft assembly, and outer skeleton axial component 311 is provided with 313 (such as Fig. 2 of the second air admission hole as radial direction through hole
It is shown).When outer skeleton axial component 311 is fixed on shell 2, second air admission hole 313 and the first air admission hole of the setting of shell 2
21 correspond to connection and form inlet channel, which connects with accommodation space so that extraneous air can flow into receiving sky
In.Secondary lip 35 is arranged at the radially inner side end of outer skeleton radial component 312.
Inner frame 32 has axially the inner frame axial component 321 of A extensions and the axis from inner frame axial component 321
The inner frame radial component 322 that inside side end extends along radial direction R to radially inner side.Inner frame axial component 321 is with not shadow
It rings the mode connected between inlet channel and accommodation space and is fixed on outer skeleton axial component 311.Inner frame radial component 322 exists
Extension and that the accommodation space is separated on axial A to the first space S 1 and second side by side and to communicate with each other is empty in accommodation space
Between S2, inlet channel directly connects with the first space S 1, and second space S2 is connected with the axially external of cartridge seal structure 3.From
Heart lip 34 is arranged at inner frame radial component 322.
In the present embodiment, dust ring 33 has the axially dust ring axial component 331 of A extensions and from dust ring
The dust ring radial component 332 that the axially external end of axial component 331 extends along radial direction R to radial outside.Dust-proof annulate shaft
The axis 1 of shaft assembly is fixed on to part 331.Dust ring radial component 332 is abutted with centrifugation lip 34, and in dust ring radially
Part 332 is provided with multiple first eccentric grooves 333 (as shown in Figure 3), the specific set-up mode of first eccentric groove 333 will with
It is illustrated in lower content.
In the present embodiment, two centrifugation lips 34 being separated from each other are provided on inner frame radial component 322.
Two centrifugation lips 34 may be contained in second space S2, and each centrifugation lip 34 from inner frame radial component 322 compared with
Axial A obliquely extends to radial outside.Respectively centrifuge the thinner thickness of lip 34 and with elasticity so that respectively centrifuge lip 34
Axially outer portion is connected to dust ring radial component 332.In this way, when dust ring 33 (axis 1) does not rotate, centrifugation lip 34
Axially outer portion can be pressed against dust ring radial component 332 under centrifugation lip 34 resilient force of itself and cover more
A first eccentric groove 333, so as to which the axially external pollutant for cartridge seal structure 3 generates good static sealing.
In the present embodiment, secondary lip 35 is arranged at the radially inner side end of outer skeleton radial component 312 and extends
To axis 1 so that secondary lip 35 can be pressed against axis 1 when axis 1 does not rotate under the secondary resilient force of of lip 35 itself, so as to
Good static sealing is generated for the lubricant medium of the axially inner side of cartridge seal structure 3.It is abutted in secondary lip 35 with axis 1
At position, secondary lip 35 is provided with multiple pump oil slots 353 (as shown in Figure 4) being used for axially inner side pumping lubricant medium, should
The specific set-up mode of pump oil slot 353 will illustrate in herein below.
Hereinafter with reference to setting for Fig. 3 and Fig. 4 the first eccentric groove 333 for illustrating to be arranged at dust ring radial component 332 respectively
It puts mode and is arranged at the set-up mode of the pump oil slot 353 of secondary lip 35.
As shown in figure 3, in the present embodiment, it is used for what is abutted with centrifugation lip 34 in dust ring radial component 332
At position (the axially inner side face of dust ring radial component 332), dust ring radial component 332 is provided with multiple approximately along circumferential direction
C extension the first eccentric groove 333, can so ensure during dust ring 33 rotates together with axis 1 air-flow first from
It is successfully flowed in heart slot 333.
In the present embodiment, circumferential one end of each first eccentric groove 333 be located at first eccentric groove 333 circumferential direction it is another
The radial outside at end so that air-flow flows into from the circumferential other end of each first eccentric groove 333 and from the when dust ring 33 rotates
Circumferential one end outflow of one eccentric groove 333 so can arrange the pollutant assembled at the first eccentric groove 333 to radial outside
Go out.
In the present embodiment, the width (size on radial direction R) of the first eccentric groove 333 is from the circumferential other end to circumferential direction one
The process for first becoming larger and being gradually reduced again is undergone during the extension of end, so that air-flow can be in the first eccentric groove 333
In flow velocity faster.
In the present embodiment, the shape of first eccentric groove 333 is arc groove (alternatively referred to as parabolic wire casing).In addition,
Multiple (being in the present embodiment two) centrifugation lip 34 is provided with multi-turn (in the present embodiment be two circle) the
One eccentric groove 333.Corresponding to one centrifugation lip 34 set one circle on multiple first eccentric grooves 333 circumferentially C whole
It is arranged on week, adjacent two the first eccentric grooves 333 can partly overlap on radial direction R, can so be set more on a circle
First eccentric groove 333 of multi-quantity.
As shown in figure 4, in the present embodiment, secondary lip 35 has the secondary lip radial component 352 extended along radial direction R
And from the radially inner side end of secondary lip radial component 352 generally along an axial A extension secondary lip axial component 351.It is secondary
Lip radial component 352 is arranged at the radially inner side end of outer skeleton radial component 312.Secondary lip axial component 351 be used for
Axis 1 abuts.In secondary lip axial component 351 for the (radial direction of i.e. secondary lip axial component 351 at the position that is abutted with axis 1
Medial surface), secondary lip axial component 351 is provided with multiple pump oil slots 353 obliquely extended compared with axial A.In this implementation
In mode, circumferentially C is evenly distributed on complete cycle for multiple pump oil slots 353, and two adjacent pump oil slots 353 are separated from each other.
In the present embodiment, the axially inner side end of pump oil slot 353 opening at the axially inner side ora terminalis of secondary lip 35, but
It is that the axially external end of pump oil slot 353 terminates in secondary lip 35 that (i.e. the axially external end of pump oil slot 353 is in the axis of secondary lip 35
There is no opening at ora terminalis outward).In such manner, it is possible to so that even if the lubricant medium of the axially inner side of cartridge seal structure 3 passes through
The axially inner side end of pump oil slot 353 is also not easy to flow into the accommodation space of cartridge seal structure 3 after entering.
It should be noted that the first eccentric groove 333 and pump oil slot 353 that set in the present embodiment are suitable for axis 1
The situation of one-directional rotation.Pollutant can finally be arranged by the first eccentric groove 333 in addition, the rotation direction of axis 1 should be ensured that
Go out to the axially external of cartridge seal structure, and ensure that lubricant medium can be pumped into cartridge seal structure by pump oil slot 353
Axially inner side.
Illustrate the operation principle of the cartridge seal structure 3 of present embodiment and generated effect below.
(1) static sealing
When dust ring 33 and axis 1 do not rotate (i.e. axis 1 does not produce relative rotation with shell 2), inlet channel does not have air-flow
Into the accommodation space of cartridge seal structure 3, centrifugation lip 34 is pressed against dust ring radial component 332 to realize to axially external
Pollutant good static sealing, and secondary lip 35 is pressed against axis 1 to realize to the good of the lubricant medium of axially inner side
Good static sealing.
(2) dynamic sealing and pumping effect
When dust ring 33 rotates (i.e. axis 1 produces relative rotation with shell 2) together with axis 1, air-flow passes through inlet channel
Into the accommodation space of cartridge seal structure 3, air pressure and the air pressure of its outside in cartridge seal structure 3 reach flat
Weighing apparatus, air-flow enable to centrifugation lip 34 to be disengaged with dust ring radial component 332 (i.e. in centrifugation lip 34 and dust ring 33
Between generate certain slight gap), this can be referred to as hydrodynamic effect.Thus it is possible, on the one hand, ensure in centrifugation lip 34
While good dynamic sealing effect, which can be ensured that centrifugation lip 34 will not with the dust ring of high-speed rotation
33 generate friction, so as to prevent the abrasion of centrifugation lip 34.On the other hand, the air-flow entered from inlet channel can be by this
Slight gap flows out, so as to the first eccentric groove 333 for discharging the air pressure in accommodation space and being set on dust ring 33
The pollutant that will accumulate near centrifugation lip 34 discharges (pumping effect) from the slight gap.
In addition, the air-flow flowed into from inlet channel can also cause secondary lip 35 to be disengaged with axis 1 (i.e. in secondary lip 35
Certain slight gap is generated between axis 1), this can also be referred to as hydrodynamic effect.It ensure that well in secondary lip 35
Dynamic sealing effect while, the profit that secondary lip 35 can be collected around by the effect of the pump oil slot 353 of secondary lip 35
Sliding medium is pumped into the inside (pumping effect) of shaft assembly.
In this way, cartridge seal structure 3 according to the present invention can realize good dynamic sealing and to lubricant medium and dirt
Contaminate the good pumping effect of object.
(second embodiment)
As shown in figure 5, cartridge seal structure 3 second embodiment of the invention is with respect to the of the present invention
The cartridge seal structure 3 of one embodiment difference lies in：The cartridge seal structure 3 only has there are one lip 34 is centrifuged, accordingly
Ground corresponds to the first eccentric groove 333 (as shown in Figure 7) that this centrifugation lip 34 only sets a circle；In outer skeleton axial component
Gap is formed between 311 and shell 2 as additional air accommodation space S3；Outer skeleton radial component 312 has to axial direction
The structure of outside bending.
Since a centrifugation lip 34 can be realized as to the good of the axially external pollutant of cartridge seal structure 3
Static sealing and dynamic sealing, therefore in the present embodiment, a centrifugation lip is only provided in inner frame radial component 322
34, accordingly the first of a circle is only set at the position abutted with this centrifugation lip 34 of dust ring radial component 332
Eccentric groove 333 (as shown in Figure 7).
In order to enable the air pressure in cartridge seal structure 3 is more stablized, outer skeleton axial component 311 is in the second air inlet
Circumferentially the complete cycle of C sets the oriented concave structure of radially inner side (as shown in Figure 6) at hole 313, so axial in outer skeleton
Gap is formed between part 311 and shell 2 as additional air accommodation space S3, the additional air accommodation space S3 shapes
Into cricoid air band, it is achieved thereby that said effect.
Due to inevitably causing the axial dimension of outer skeleton 31 when setting above-mentioned additional air accommodation space S3
Become larger, consequently, it is possible to the axial dimension of entire cartridge seal structure 3 is caused to become larger.In order to inhibit entire cartridge seal structure 3
Axial dimension become larger, outer skeleton radial component 312 have to axially external bending structure so that in the present embodiment
The axial position of secondary lip 35 is roughly the same with the axial position of the secondary lip 35 of first embodiment.
In addition, as shown in figure 8, in the present embodiment, pump oil slot 353 does not extend obliquely compared with axial A, but edge
Axial direction A extensions.
The operation principle and generated effect and first embodiment of cartridge seal structure 3 according to the present embodiment
Cartridge seal structure 3 operation principle and generated effect it is essentially identical, therefore just repeat no more herein.
(the 3rd embodiment)
As shown in figure 9, the cartridge seal structure 3 of the 3rd embodiment according to the present invention is with respect to the of the present invention
The difference of the cartridge seal structure 3 of one embodiment includes the following difference illustrated in the above-described 2nd embodiment：In dermoskeleton
Gap is formed between frame axial component 311 and shell 2 as additional air accommodation space S3；Outer skeleton radial component 312
With the structure to axially external bending.
In addition, as shown in Figure 10, in the present embodiment, dust ring radial component 332 is provided with two circles approximately along week
To multiple eccentric grooves of extension.Often enclose eccentric groove in all include reciprocal first eccentric groove 333 and second of extending direction from
Heart slot 334.Circumferential one end of each first eccentric groove 333 is located at the radial outside of the circumferential other end of first eccentric groove 333, respectively
The width (size on radial direction R) of first eccentric groove 333 is gradually reduced from the circumferential other end towards circumferential one end.Each second centrifugation
The circumferential other end of slot 334 is located at the radial outside of circumferential one end of second eccentric groove 334, the width of each second eccentric groove 334
Degree (size on radial direction R) is gradually reduced from circumferential one end towards the circumferential other end.In such manner, it is possible to so that eccentric groove axis 1 into
It can play the role of pumping pollutant during row Double-directional rotary.Preferably, on each circle, the first eccentric groove 333 and second from
Heart slot 334 is arranged in pairs.
As shown in figure 11, in the present embodiment, the shape of each pump oil slot 353 is that the ring-type of part (can be described as semi-ring
Shape slot), each pump oil slot 353 has at the axially inner side ora terminalis of secondary lip axial component 351 there are two opening.In such manner, it is possible to
So that pump oil slot 353 plays the role of pumping lubricant medium when axis 1 carries out Double-directional rotary.
The operation principle and generated effect and first embodiment of cartridge seal structure 3 according to the present embodiment
Cartridge seal structure 3 operation principle and generated effect it is essentially identical, therefore just repeat no more herein.
Further, although having been carried out in detail to technical scheme above by the specific embodiment of the application
Ground illustrates that it is however, there remains explanation is：
Although 1. only illustrated in above-mentioned specific embodiment sealing element according to the present invention for shaft assembly sealing,
It is that the invention is not limited thereto, sealing element according to the present invention can be also used between other two components that can be relatively rotated
Sealing, such as the sealing for bearing.
2. although do not illustrated in above-mentioned specific embodiment, it is preferable that centrifugation lip 34 and secondary lip 35
It is made of the elastic material of rubber etc., outer skeleton 31, inner frame 32 and dust ring 33 are made of the rigid material of metal etc..
3. although do not illustrated in above-mentioned specific embodiment, it is preferable that outer skeleton 31 is with inner frame 32
It is individually stamping forming.It certainly, in some cases, can also integrally formed outer skeleton 31 and inner frame 32.
4. by using the cartridge seal structure 3 of the present invention so that the cartridge seal structure 3 have for lubricant medium and
The good static sealing of pollutant and dynamic sealing can also prevent boxlike during by inlet channel continuous gas entry
The abrasion of the sealed lip of sealing structure 3 improve the service life of cartridge seal structure 3.In addition, the cartridge seal structure 3
Compact-sized (have relatively small axial dimension), stringenter occasion is required suitable for size.
By using above-mentioned technical proposal, the present invention provides a kind of contactless fluids close to zero leakage, zero friction
Dynamic pressure type cartridge seal structure.
Protection scope of the present invention is not limited to the embodiment in above-mentioned specific embodiment, as long as but meeting the present invention's
The combination of the technical characteristic of claim is just fallen into protection scope of the present invention.
Claims (9)
1. a kind of cartridge seal structure is used for the sealing for the first component and second component that can be relatively rotated, the boxlike
Sealing structure is integrally annular in shape, which is characterized in that the cartridge seal structure includes：
Dust ring, the dust ring are used to be fixed on the first component；
Skeleton, the skeleton are used to be fixed on the second component, and accommodation space is formed between the skeleton and the dust ring,
The skeleton is formed with the air admission hole connected with the accommodation space；And
At least one centrifugation lip, it is described it is at least one centrifugation lip be arranged at the skeleton and from the skeleton extend with
The dust ring abuts, and at least one centrifugation lip is configured to：When the first component and the second component
During relative rotation, the air-flow of the accommodation space is flowed into from the air admission hole of the skeleton can make at least one centrifugation lip
Predetermined space is separated with the dust ring and the air-flow can flow out the cartridge seal structure from the interval.
2. cartridge seal structure according to claim 1, which is characterized in that the skeleton include for second structure
The fixed outer skeleton of part and with the outer fixed inner frame of skeleton,
The outer skeleton is formed with the air admission hole, and
The inner frame has the inner frame radial component radially extended, and the inner frame radial component accommodates sky by described
Between be separated into the first space to communicate with each other and second space, first space is connected with the air admission hole of the outer skeleton, institute
It states second space to connect with the external of the cartridge seal structure, at least one centrifugation lip is arranged at the inner frame footpath
To part and extend to abut with the dust ring from the inner frame radial component in the second space.
3. cartridge seal structure according to claim 2, which is characterized in that the dust ring has what is radially extended
Dust ring radial component, at least one centrifugation lip are abutted with the dust ring radial component, and
At the position abutted at least one centrifugation lip of the dust ring radial component, the dust ring radial part
Set up the multiple eccentric grooves being equipped with approximately along circumferentially extending separately.
4. cartridge seal structure according to claim 3, which is characterized in that the multiple eccentric groove includes the first centrifugation
Slot,
Circumferential one end of first eccentric groove is located at the radial outside of the circumferential other end of first eccentric groove, described first from
At least part of width for including described circumferential one end of heart slot is gradually reduced towards the circumferential direction one end.
5. cartridge seal structure according to claim 4, which is characterized in that the multiple eccentric groove further includes the second centrifugation
Slot,
The circumferential other end of second eccentric groove is located at the radial outside of circumferential one end of second eccentric groove, described second from
At least part of width for including the circumferential other end of heart slot is gradually reduced towards the circumferential direction other end.
6. cartridge seal structure according to any one of claim 1 to 5, which is characterized in that the cartridge seal structure
Secondary lip is further included, the pair lip is arranged at the skeleton and extends to support with the first component from the skeleton
It connects, and the secondary lip is configured to：When the first component and the second component relatively rotate, from the skeleton
The air-flow that air admission hole flows into the accommodation space can make the secondary lip separate predetermined space with the first component.
7. cartridge seal structure according to claim 6, which is characterized in that in being used for and described first for the secondary lip
At the position that component abuts, the pair lip, which is provided with, to be axially extended and/or compared with axially inclined extends multiple
Pump oil slot, pump oil slot opening at the axially inner side ora terminalis of the secondary lip, the pump oil slot is in the axis of the secondary lip
It is not open at ora terminalis outward.
8. cartridge seal structure according to claim 6, which is characterized in that in being used for and described first for the secondary lip
At the position that component abuts, the pair lip is provided with multiple semicircular slots,
The both ends of semicircular slot opening at the axially inner side ora terminalis of the secondary lip, the semicircular slot is in the pair
It is not open at the axially external ora terminalis of lip.
9. cartridge seal structure according to any one of claim 1 to 5, which is characterized in that in the formation of the skeleton
At the position of the air admission hole, the skeleton is provided with the recess of circumferentially complete cycle in the skeleton and described second
Additional air accommodation space is formed between component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611037372.7A CN108087556B (en) | 2016-11-23 | 2016-11-23 | Box type sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611037372.7A CN108087556B (en) | 2016-11-23 | 2016-11-23 | Box type sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108087556A true CN108087556A (en) | 2018-05-29 |
| CN108087556B CN108087556B (en) | 2021-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611037372.7A Active CN108087556B (en) | 2016-11-23 | 2016-11-23 | Box type sealing structure |
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| Country | Link |
|---|---|
| CN (1) | CN108087556B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630745A (en) * | 2018-06-25 | 2019-12-31 | Nok株式会社 | Sealing device |
| CN110656900A (en) * | 2019-09-29 | 2020-01-07 | 中煤科工集团重庆研究院有限公司 | Non-contact sealing structure and non-contact drilling dust extraction cover |
| CN113324036A (en) * | 2021-05-29 | 2021-08-31 | 伯科姆汽车零部件系统(苏州)有限公司 | Dustproof lip oil seal |
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| CN113324036A (en) * | 2021-05-29 | 2021-08-31 | 伯科姆汽车零部件系统(苏州)有限公司 | Dustproof lip oil seal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108087556B (en) | 2021-03-30 |
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