CN106015572B - Bi-directionally rotatable cross-scale slotted hole combined end face mechanical sealing structure - Google Patents
Bi-directionally rotatable cross-scale slotted hole combined end face mechanical sealing structure Download PDFInfo
- Publication number
- CN106015572B CN106015572B CN201610609154.XA CN201610609154A CN106015572B CN 106015572 B CN106015572 B CN 106015572B CN 201610609154 A CN201610609154 A CN 201610609154A CN 106015572 B CN106015572 B CN 106015572B
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- China
- Prior art keywords
- helicla flute
- groove
- arc groove
- face
- sealing
- 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.)
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- 238000007789 sealing Methods 0.000 title claims abstract description 46
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 12
- 230000002457 bidirectional effect Effects 0.000 claims description 19
- 238000012856 packing Methods 0.000 claims description 2
- 230000003068 static effect Effects 0.000 abstract 2
- 239000012530 fluid Substances 0.000 description 14
- 239000007787 solid Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 206010020852 Hypertonia Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 230000002195 synergetic effect Effects 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
-
- 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
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/12—Details
- F16J9/20—Rings with special cross-section; Oil-scraping rings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Sealing (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
A cross-scale groove hole combined end face mechanical sealing structure capable of rotating in two directions comprises a moving ring and a static ring which are mechanically sealed, wherein the sealing end face of at least one sealing ring in the moving ring or the static ring is provided with surface textures which are uniformly distributed along the circumference of the end face and can rotate in two directions, and the surface textures comprise circular pressure reducing holes with millimeter-scale depth, circular arc grooves, spiral grooves with micron-scale depth and directional inclined micropores; the circular arc groove is positioned on the high-pressure side of the end surface, namely the upstream, and the circular pressure reducing hole is positioned on the low-pressure side of the end surface, namely the downstream; the circular arc groove takes a certain radius as a symmetry axis, the spiral grooves positioned at two sides of the circular arc groove are symmetrically arranged along the symmetry axis, the groove root of the spiral groove extends to the downstream, and the circular pressure reducing hole is positioned at the groove root; the spiral groove starts from the high-pressure side of the end face, gradually turns towards the direction of the arc groove from the upstream to the downstream, and the width is gradually reduced; a sealing weir is arranged between the spiral groove and the arc groove, and directional inclined micropores are formed in the sealing weir; a continuous annular sealing dam is arranged at the downstream position of the surface texture.
Description
Technical field
The present invention relates to mechanical end face sealing structure design field, and in particular to it is a kind of can bidirectional rotation across scale
Slot combination end surface mechanical sealing structure, especially suitable for start and stop, frequently various compressors, pump and kettle blender etc. rotate
The axle end sealing device of machinery.
Background technology
Mechanical seal is because the significant advantages such as its slip is low, friction power loss is small, long lifespan are in the shaft end seal of rotating machinery
On be applied widely, such as the compressor of the industry such as petrochemical industry, the energy and aerospace, pump and kettle blender etc. rotation
The shaft end seal of favourable turn tool.With the fast development of the industries such as petrochemical industry and aerospace, it is desirable to which mechanical seal adapts to height
The severe sealed environments such as parameter, variable working condition and special physical property medium.Country's external seal texture form includes micropore texture at present
With groove-shaped texture, micropore texture end face has the function that preferable abrasive resistance and receives solid particle, suitable for solid
The higher sealing occasion of grain content, but micropore is easily prematured by solids so as to texture function of scattering and disappearing.If groove-shaped texture Profile Design
Rationally, guide functions can be played, dynamic pressure opening feature is generally preferable, includes both at home and abroad using more groove molded line at present spiral
Line, circular arc line, straight line etc.；But dynamic pressure effect is weak under lower pressure due to groove-shaped texture, the fluid film bearing capacity of formation
It is poor, and during frequent start-stop, the easy clashing and breaking in end face；Under elevated pressure conditions, the molded line of groove is selected and combined and is particularly significant,
Make sealing ring end face air film stability poor if dealing with improperly, easily sealing ring is touched mill and eccentric wear, seriously undermine sealing ring
Service life.
The content of the invention
The present invention will overcome the disadvantages mentioned above of the prior art, the present invention provide one kind adapt to rotating machinery frequent start-stop,
The end surface mechanical sealing structure that solid content is high in sealing medium and medium temperature is high.
The technical scheme is that：
It is a kind of can bidirectional rotation across scale slot combination end surface mechanical sealing structure, it is including the rotating ring of mechanical seal, quiet
Ring, opens up on the seal face of at least one sealing ring in the rotating ring or stationary ring along end face even circumferential distribution and can bidirectional rotary
The Surface Texture that across the scale slot turned combines, the Surface Texture that across the scale slot combines include the circle of grade depth
The helicla flute 3 and directionality of vent 5, arc groove 2 and micrometer level depth tilt micropore 4；The arc groove 2 is located at end face height
Side, that is, upstream is pressed, the circle vent 5 is located at end face low-pressure side, that is, downstream；Arc groove 2 is located at using certain Radius as symmetry axis
The helicla flute 3 of 2 both sides of arc groove is arranged symmetrically along the symmetry axis, and the groove root of helicla flute 3 stretches to downstream, circular vent 5
At groove root；Helicla flute 3 originates in end face high-pressure side, and helicla flute 3 is gradually curved to the direction of arc groove 2 from downstream is above swum over to
Turn, and tapering width；There is sealing weir 1 between the helicla flute 3 and arc groove 2, directionality inclination is opened up in sealing weir 1
Micropore 4, the major axis that directionality tilts micropore 4 are parallel with the boundary line of 2 side of close arc groove of helicla flute 3；It is described can bidirectional rotary
The downstream position for the Surface Texture that across the scale slot turned combines is equipped with a continuous ring packing dam 6.
Further, the depth h of the circular vent0For：0.5mm≤h0≤1mm；The circular arc groove depth h1For:1mm
≤h1≤3mm；The directionality tilts micropore depth h2For：50 μm of ＜ h3100 μm of ＜；It is described to be radially arranged symmetrically helicla flute
Depth h3For：5μm≤h4≤10μm；It is described be radially arranged symmetrically helicla flute helixangleβ be：5°≤β≤15°.
Further, there be n circular vent in the groove root position for being radially arranged symmetrically helicla flute：1≤n≤2.
Using it is of the present invention it is a kind of can bidirectional rotation across scale slot combination end surface mechanical sealing structure it is applicable
Machinery is alternately rotated in one direction or twocouese.
The operation principle of the present invention：
It is provided by the invention can bidirectional rotation across scale slot combination end surface mechanical sealing structure, in seal face high pressure
Side, that is, upstream is provided with the helicla flute being radially arranged symmetrically of the arc groove of grade depth, micrometer level depth, arc groove and spiral shell
The directionality that major axis and the essentially identical micrometer level depth in helicla flute molded line direction are offered in sealing weir between spin slot tilts
Micropore, the groove root of helicla flute set the circular vent of grade depth.Under low speed or low pressure operating mode, produced by upstream high
Pressure current approach axis tilt micropore after, tangential rotating speed cutting effect under, micropore long axis direction fluid flow is continuous
Accumulation, pressure gradually step up, form miniature dynamic pressure groove, realize the unlatching of low pressure operating mode lower face；Arc groove and helicla flute convection current
Body plays guide functions, can guarantee that directionality tilts the supply that micropore obtains fluid as quickly as possible, improves miniature dynamic pressure groove
Dynamic pressure opening feature, realize the quick unlatching of sealing ring end face.In the pressure at a high speed or under high pressure operating mode, produced by upstream high
Force flow is primarily entered in the texture opening direction helicla flute consistent with shaft direction of rotation, and high pressure is produced in helicla flute groove root
Area, seal face is separated and forms fluid film；A part of fluid enters the circular vent of grade depth, avoids helicla flute
Root higher-pressure region because of hypertonia and caused by fluid film it is unstable, improve the resistance damping characteristics of sealing ring；Directionality tilts micro-
Hole can lifting fluid film dynamic pressure opening feature, while improve fluid film pressure distribution, lifting fluid membrane stability；Grade depth
Arc groove accelerate circulation of the fluid in sealing ring end face, on the one hand can strengthen the heat dissipation of seal face, on the other hand can shape
Circumferentially waviness and axial taper, strengthen sealing ring dynamic pressure effect；Sealing ring can be achieved by the synergistic effect of each Surface Texture
Reach maximum dynamic pressure opening feature, while adapt to sealing ring and cause sealing ring dynamic pressure due to the suddenly change of working condition
Effect rapid drawdown, improves the fluid membrane stability of seal face, extends sealing life.When solid content in pumped (conveying) medium
When higher, directionality, which tilts micropore and circular vent, can play the role of receiving particle, prevent abrasion of particles seal face；And
The guide functions of arc groove and helicla flute can take away the granule medium in micropore and vent in time, prevent from being blocked up by solid particle
Plug, ensure that the normal performance of micropore texture function, improves adaptability of the seal face to solid particle.
Beneficial effects of the present invention are mainly manifested in：
Unlatching is easily under low speed or low pressure and high speed or condition of high voltage, dynamic pressure effect is strong, fluid membrane stability is good, lets out
Leak rate bottom, sealing life length, adapts to environment containing solid particle medium, can meet that rotating machinery frequent start-stop operating mode and reversion will
Ask.
Brief description of the drawings
Fig. 1 be the embodiment of the present invention 1 can bidirectional rotation across scale slot combination end structure illustration.
Fig. 2 be the embodiment of the present invention 1 can bidirectional rotation across scale slot combine Surface Texture partial enlarged view.
Fig. 3 is the Surface Texture slot bottom schematic cross-section taken along line A-A in attached drawing 2 of the embodiment of the present invention 1.
Fig. 4 is the Surface Texture slot bottom schematic cross-section taken along line B-B in attached drawing 2 of the embodiment of the present invention 1.
Fig. 5 be the embodiment of the present invention 2 helicla flute and arc groove slot bottom section along radial direction texture schematic diagram (wherein
C, E represents upstream side, and D, F represent downstream).
Fig. 6 be the present invention can bidirectional rotation across scale slot combination end structure illustration, wherein up and down
Four blocks show respectively four kinds of structures.
Wherein：1- sealing weirs；2- arc grooves；3- helicla flutes；4- directionality tilts micropore；5- circle vents；6- annulars
Seals dam.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings
Referring to the drawings：
Embodiment 1
Referring to the drawings 1, Fig. 2, Fig. 3 and Fig. 4, it is a kind of can bidirectional rotation across scale slot combination end surface mechanical sealing knot
Structure, including the rotating ring of mechanical seal, stationary ring, open up along end on the seal face of at least one sealing ring in the rotating ring or stationary ring
The distribution of face even circumferential and can bidirectional rotation the Surface Texture that combines of across scale slot, the surface that across the scale slot combines
The helicla flute 3 and directionality of circular vent 5 of the texture including grade depth, arc groove 2 and micrometer level depth tilt micro-
Hole 4；The arc groove 2 is located at end face high-pressure side, that is, upstream, and the circle vent 5 is located at end face low-pressure side, that is, downstream；Circular arc
Groove 2 is using certain Radius as symmetry axis, and the helicla flute 3 positioned at 2 both sides of arc groove is arranged symmetrically along the symmetry axis, helicla flute 3
Groove root stretch to downstream, circular vent 5 is located at groove root；Helicla flute 3 originates in end face high-pressure side, and helicla flute 3 is from above swimming over to
Downstream is gradually curved to the direction of arc groove 2, and tapering width；There is sealing weir between the helicla flute 3 and arc groove 2
1, directionality is opened up in sealing weir 1 and tilts micropore 4, directionality tilts the major axis of micropore 4 and the close arc groove 2 one of helicla flute 3
The boundary line of side is parallel；It is described can the downstream position of Surface Texture that combines of across scale slot of bidirectional rotation be equipped with a continuous ring
Shape seals dam 6.
Further, the depth h of the circular vent0For：0.5mm≤h0≤1mm；The circular arc groove depth h1For:1mm
≤h1≤3mm；The directionality tilts micropore depth h2For：50 μm of ＜ h3100 μm of ＜；It is described to be radially arranged symmetrically helicla flute
Depth h3For：5μm≤h4≤10μm；It is described be radially arranged symmetrically helicla flute helixangleβ be：5°≤β≤15°.
Further, the helicla flute 3 being radially arranged symmetrically groove root position have n circle vent be：1≤n≤
2。
Embodiment 2
With reference to 1,2,3,5, the present embodiment and the difference of embodiment 1 are, the helicla flute 3 and arc groove 2
Depth, which is gradually reduced or is stepped from upstream toward downstream, successively decreases, remaining structure and embodiment are same as Example 1.This knot
Structure hydrodynamic effect on the basis of embodiment 1 further gets a promotion, and fluid film rigidity and face opening characteristic are more excellent.
Embodiment 3
With reference to Fig. 1,2,3,4,6, the present embodiment and the difference of embodiment 1 are, the circle vent 5 is located at edge
Between the helicla flute 3 of radial symmetric arrangement in the sealing weir 1 of upstream side, as shown in the lower part of Figure 6.
Or as shown in Fig. 6 left parts, the end of helicla flute 3 is one section of circular arc, which is defined as：In two vent phases
Cut and the circle concentric with seal face, it intersects two sections of circular arcs of composition with the helix of helicla flute.()
Or as in fig. 6 upper, the helicla flute of both sides intersects (), respectively have at the respective groove root of the helicla flute 3 of both sides
One circular vent 5.Remaining structure and embodiment are same as Example 1.
Latter two structure can ensure that 3 end of helicla flute forms 2 equally distributed higher-pressure regions on the basis of embodiment 1,
Hydrodynamic effect and the stability of fluid film are improved, face opening characteristic is more excellent.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Scope is not construed as being only limitted to the concrete form that embodiment is stated, protection scope of the present invention also includes art technology
Personnel conceive according to the present invention it is conceivable that equivalent technologies mean.
Claims (4)
1. it is a kind of can bidirectional rotation across scale slot combination end surface mechanical sealing structure, including the rotating ring of mechanical seal, stationary ring,
It is characterized in that：Opened up in the rotating ring or stationary ring on the seal face of at least one sealing ring along end face even circumferential distribution and
Can bidirectional rotation the Surface Texture that combines of across scale slot, it is deep that the Surface Texture that across the scale slot combines includes grade
Circular vent (5), arc groove (2) and the directionality of degree tilt the helicla flute (3) of micropore (4) and micrometer level depth；It is described
Arc groove 2 is located at end face high-pressure side, that is, upstream, and the circle vent 5 is located at end face low-pressure side, that is, downstream；Arc groove (2) is with certain
Radius is symmetry axis, and the helicla flute 3 positioned at arc groove (2) both sides is arranged symmetrically along the symmetry axis, the groove of helicla flute (3)
Root stretches to downstream, and circular vent (5) is located at groove root；Helicla flute (3) originates in end face high-pressure side, and helicla flute (3) is from upstream
Gradually curved to downstream to the direction of arc groove (2), and tapering width；Between the helicla flute (3) and arc groove (2)
There is sealing weir (1), directionality is opened up in sealing weir (1) and tilts micropore (4), directionality tilts the major axis and helicla flute of micropore (4)
(3) boundary line of close arc groove (2) side is parallel；It is described can bidirectional rotation across scale slot combine Surface Texture under
Trip position is equipped with a continuous ring packing dam (6).
2. it is as claimed in claim 1 it is a kind of can bidirectional rotation across scale slot combination end surface mechanical sealing structure, its feature
It is：The depth h of the circle vent (5)0For：0.5mm≤h0≤1mm；The circular arc groove depth h1For:1mm≤h1≤
3mm；The directionality tilts micropore (4) depth h2For：50 μm of ＜ h3100 μm of ＜；It is described to be radially arranged symmetrically helicla flute (3)
Depth h3For：5μm≤h4≤10μm；It is described be radially arranged symmetrically helicla flute helixangleβ be：5°≤β≤15°.
3. it is as claimed in claim 2 it is a kind of can bidirectional rotation across scale slot combination end surface mechanical sealing structure, its feature
It is：There are n circular vent, 1≤n≤2 in the groove root position for being radially arranged symmetrically helicla flute (3).
4. it is as claimed in claim 3 it is a kind of can bidirectional rotation across scale slot combination end surface mechanical sealing structure, its feature
It is：The helicla flute (3) of both sides is intersecting, respectively there is a circular vent at the respective groove root of the helicla flute (3) of both sides
(5)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610609154.XA CN106015572B (en) | 2016-07-27 | 2016-07-27 | Bi-directionally rotatable cross-scale slotted hole combined end face mechanical sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610609154.XA CN106015572B (en) | 2016-07-27 | 2016-07-27 | Bi-directionally rotatable cross-scale slotted hole combined end face mechanical sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106015572A CN106015572A (en) | 2016-10-12 |
| CN106015572B true CN106015572B (en) | 2018-05-08 |
Family
ID=57115622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610609154.XA Active CN106015572B (en) | 2016-07-27 | 2016-07-27 | Bi-directionally rotatable cross-scale slotted hole combined end face mechanical sealing structure |
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| Country | Link |
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| CN (1) | CN106015572B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106763795B (en) * | 2016-12-28 | 2018-11-02 | 合肥通用机械研究院有限公司 | A kind of mechanically-sealing apparatus suitable for weary oily operating mode |
| CN111148926A (en) * | 2017-10-03 | 2020-05-12 | 伊格尔工业股份有限公司 | Sliding component |
| WO2021205554A1 (en) | 2020-04-07 | 2021-10-14 | イーグル工業株式会社 | Sliding component |
| CN114251457A (en) * | 2021-12-17 | 2022-03-29 | 浙江工业大学 | Tandem arc groove type bidirectional rotary seal end face structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2198463Y (en) * | 1994-08-26 | 1995-05-24 | 王廷阁 | Mechanical sealing |
| CN101016949A (en) * | 2007-02-15 | 2007-08-15 | 浙江工业大学 | Variable distribution porous end face mechanical sealing structure |
| CN102022542A (en) * | 2010-12-11 | 2011-04-20 | 浙江工业大学 | Negative pressure groove end face mechanical seal structure |
| JP4787774B2 (en) * | 2007-02-26 | 2011-10-05 | 未来工業株式会社 | Seal member and pipe joint |
| JP5671903B2 (en) * | 2010-09-16 | 2015-02-18 | 株式会社ジェイテクト | Seal structure and valve device |
| CN204573105U (en) * | 2015-04-09 | 2015-08-19 | 江西省科学院应用物理研究所 | The non-contact mechanical seal structure that directivity macropore combines with three dimensional type groove |
| CN206092957U (en) * | 2016-07-27 | 2017-04-12 | 浙江工业大学 | Yardstick slotted hole of striding that can two -way rotation combines terminal surface mechanical seal structure |
-
2016
- 2016-07-27 CN CN201610609154.XA patent/CN106015572B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2198463Y (en) * | 1994-08-26 | 1995-05-24 | 王廷阁 | Mechanical sealing |
| CN101016949A (en) * | 2007-02-15 | 2007-08-15 | 浙江工业大学 | Variable distribution porous end face mechanical sealing structure |
| JP4787774B2 (en) * | 2007-02-26 | 2011-10-05 | 未来工業株式会社 | Seal member and pipe joint |
| JP5671903B2 (en) * | 2010-09-16 | 2015-02-18 | 株式会社ジェイテクト | Seal structure and valve device |
| CN102022542A (en) * | 2010-12-11 | 2011-04-20 | 浙江工业大学 | Negative pressure groove end face mechanical seal structure |
| CN204573105U (en) * | 2015-04-09 | 2015-08-19 | 江西省科学院应用物理研究所 | The non-contact mechanical seal structure that directivity macropore combines with three dimensional type groove |
| CN206092957U (en) * | 2016-07-27 | 2017-04-12 | 浙江工业大学 | Yardstick slotted hole of striding that can two -way rotation combines terminal surface mechanical seal structure |
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| CN106015572A (en) | 2016-10-12 |
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