CN106439023A - Cosine curve mechanical seal end surface structure - Google Patents

Cosine curve mechanical seal end surface structure Download PDF

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Publication number
CN106439023A
CN106439023A CN201610607046.9A CN201610607046A CN106439023A CN 106439023 A CN106439023 A CN 106439023A CN 201610607046 A CN201610607046 A CN 201610607046A CN 106439023 A CN106439023 A CN 106439023A
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CN
China
Prior art keywords
cosine curve
groove
mechanical seal
curved groove
end surface
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Granted
Application number
CN201610607046.9A
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Chinese (zh)
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CN106439023B (en
Inventor
马学忠
孟祥铠
沈明学
彭旭东
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Zhejiang University of Technology ZJUT
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Zhejiang University of Technology ZJUT
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Priority to CN201610607046.9A priority Critical patent/CN106439023B/en
Publication of CN106439023A publication Critical patent/CN106439023A/en
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Publication of CN106439023B publication Critical patent/CN106439023B/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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/162—Special parts or details relating to lubrication or cooling of the sealing itself
    • 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
    • F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking 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
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3404—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal
    • F16J15/3408—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface
    • F16J15/3424—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface with microcavities
    • 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
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3404—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal
    • F16J15/3408—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface
    • F16J15/3428—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface with a wavy surface

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Sealing (AREA)

Abstract

The invention discloses a cosine curve mechanical seal end surface structure. The structure comprises a movable ring and a static ring of a mechanical seal; the outer ends of the sealing end surfaces of the movable ring and the static ring serve as high-pressure sides, namely upstream, and the inner ends of the sealing end surfaces serve as low-pressure sides, namely downstream; smooth and continuous annular sealing dams are arranged on the low-pressure sides of the sealing end surfaces; multiple periodically distributed curve grooves are formed in the high-pressure sides of the sealing end surfaces; openings at one ends of the curve grooves extend to the upstream of the sealing end surfaces, and the other ends of the curve grooves are positioned at the upstream of the annular dams; micro grooves are symmetrically formed in two sides of each curve groove; and the sealing end surfaces are provided with sealing weirs in non-grooving areas between the curve grooves at the upstream of the annular dams. The cosine curve mechanical seal end surface structure has the following beneficial effects: the structure is obvious in reflux effect, low in leakage rate, capable of being applied to various mediums, high in solid particle preventing capacity, excellent in static/dynamic pressure effect and capable of frequently starting and rotating in two directions.

Description

A kind of cosine curve type mechanical seal end surface structure
Technical field
The present invention relates to a kind of cosine curve type mechanical seal end surface structure, belong to fluid seals technology field.
Background technology
Shaft end seal is the critical component on basis in various rotary type fluid machines.Non-contact mechanical seal is with it at present Excellent performance has become the first-selected shaft end seal of high parameter rotary type fluid machine.For improving the reliable operation of mechanical seal Property, strengthen seal face greasy property, eliminate end wear, reduce coefficient of friction, usually in the end face of rotating ring or stationary ring The certain surface texture of upper setting or type groove, make mechanical seal hydrodynamic effect and hydrostatic effects combine formation face opening Power, makes to form complete fluid lubrication liquid film between dynamic and static ring end face, produces certain fluid film rigidity, prevents sealing surface from running During cause end face to fit due to external disturbance, cause dry friction, it is to avoid end wear.But, meanwhile with end Surface current body film thickness or the increase in gap, will cause larger slip.
At present, conventional sealing device has dry gas seals and upstream pumping mechanical seal etc., but this advanced sealing of two classes Technology is required to, using Double End or tandem mechanical seal structure, therefore increased use cost, reduce the reliability of sealing Property, and aid system is required harsher.Recently, United States Patent (USP) US7194803 discloses a kind of end face type groove and has pump Send the laser face end face seal of backflow functionality, on this basis, domestic patent ZL200920043048.5 discloses one kind to be had The mechanical seal of similar functions.
Content of the invention
Reflowing result in order to overcome sealing in prior art is inconspicuous, anti-solid particle ability, poor sealing performance Deficiency, the present invention provides a kind of reflowing result substantially, and slip is little, can apply to various media, and anti-solid particle ability is strong, quiet Dynamic pressure effect is good, can be with a kind of cosine curve type mechanical seal end surface structure of frequent starting and bidirectional rotation.
A kind of cosine curve type mechanical seal end surface structure of the present invention, the rotating ring including mechanical seal and stationary ring, The seal face outer end of described rotating ring and described stationary ring is upstream as high-pressure side, and seal face the inner as low-pressure side is Downstream it is characterised in that：Described seal face low-pressure side is provided with smooth and continuous ring packing dam；Described seal face High-pressure side is provided with multiple periodic distribution curved grooves, and described curved groove is circumferentially arranged into along corresponding seal face with seal face Center is the annular in the center of circle, and the side line of rabbet joint of curved groove is the cosine curve of half period, and the axis of symmetry edge of cosine curve Seal face radial distribution, the opening of cosine curve is located at the upstream of seal face, and the summit of cosine curve is located at ring dam Upstream, and the both sides of each curved groove are equipped with symmetrical microflute；It is bent that described seal face is located at ring dam upstream Between wire casing, unslotted region is provided with the sealing weir for current limliting and static seal.
Described curved groove the deep type groove such as is or is in radially ladder convergence or gradual change convergence convergence type groove, or It is the convergence type groove restraining to its symmetrical center line gradual change from cosine curve.
The periodicity of curved groove is：6～20.
The groove depth scope of described curved groove is：1～30 μm.
When sealing medium is liquid, groove depth scope is：10～30 μm.
When sealing medium is gas, groove depth scope is：1～10 μm.
Described microflute is symmetrically distributed in the both sides of curved groove, and microflute is drawn close to curved groove, described microflute radial dimension and week It is respectively less than radial direction or the circumferential size of curved groove to size.
The shape of described microflute includes polygon, circle, ellipse and curl polygon.
Described microflute is polygon and curl polygon, then described polygon and curl polygon should be with seals dam areas Tangent or overlap.
The width of described curved groove is wr, wherein 0<wr<W, w are seal face width.
The width of described curved groove is wr=1～6mm.
The side line of rabbet joint of described curved groove can also be class cosine curve, including sine curve, cosine curve or with Chevron curve as sine and cosine class of a curve.
The operation principle of the present invention：Segment fluid flow in fluid film between seal face under pressure reduction stream and shear flow act on, Flow to downstream inner radius, lubricate end face simultaneously, form leakage stream.A part of fluid enters longitudinal cosine type curved groove, more than upstream side Chordwise curve channel opening is larger, can form stronger hydrostatic pressure effect, and downstream side is gradually reduced, and can effectively reduce and let out Leakage.Longitudinal cosine type curved groove is in radially all convergence gap in a different manner, therefore longitudinal cosine type curved groove root can produce significantly Hydrodynamic effect, to form higher-pressure region, can effectively improve bearing capacity, simultaneously because the presence of both sides micropore or microflute Pumping effect can be produced so that leakage greatly reduces.Because longitudinal cosine type curved groove has the symmetrical profile smoothly transitting, Relatively easily the solid particle in groove can be taken out of, substantially reduce the abrasion of seal face, increase seal face simultaneously Fluid and the exchange of medium side liquid, can be effectively reduced the temperature of seal face.The microflute or micro- of longitudinal cosine type curved groove both sides Bottom land fluid, in addition to providing fluid dynamic and static pressure effect, also can be pumped to high-pressure side, partly make up the fluid of pressure reduction conductance cause by hole Leakage.Under the conditions of physical dimension identical, the mechanical sealing of the present invention is close compared to similar Hydrodynamic pressure type machinery Envelope, so that pumping effect greatly enhances on the premise of ensureing enough hydrodynamic effects, can keep higher stream Body film bearing capacity and fluid film rigidity, have excellent lubrication effect, substantially reduce sealing fluid to low-pressure side Leakage rate and end-face friction heat, also have stronger flushing action simultaneously, improve the ability of anti-solid particle, the operation of sealing Reliability strengthens, and slip declines.
Beneficial effects of the present invention：
(1) present invention adopts the mechanical seal end surface structure of longitudinal cosine type curved groove and micropore/microflute combinative structure, due to type , using the respond well cosine curve of pumping effect and water conservancy diversion, the fluid media (medium) between end face is in certain speed for groove sidewall molded line Under there is good backflow effeet, anti-solid particle ability is strengthened, and the micropore/microflute of longitudinal cosine type curved groove both sides has upstream pump Send effect, improve backflow pump action further, therefore improve the sealing of mechanical seal, reliability and stability；
(2) the longitudinal cosine type curved groove area distributions in the present invention are concentrated, big in upstream side aperture area, are conducive to static pressure to imitate The raising answered, downstream side be gradually reduced, be conducive to reduce leakage.Because longitudinal cosine type curved groove is in radially convergence gap, with Shi Suoshu longitudinal cosine type curved groove can be the convergence type groove being in radially ladder convergence or gradual change convergence, or bent from cosine The convergence type groove that line is restrained to its symmetrical center line gradual change, thus using the present invention mechanical seal under normal operating condition energy Enough produce sufficiently large hydrodynamic effect and liquid film bearing capacity, improve mechanical seal stablizing under nominal operating conditions Property；
(3) processing that cosine curve type etc. is deep, gradual change restrains type groove can be using the laser processing technology in modern forward position, can Obtain deep trouth and the gradual change type grooves such as high accuracy glossy bottom surface, substantially ensure the realization of function of the present invention；
(4) sealing device that the sealing structure of the present invention is made can achieve bidirectional rotation, seals safe and reliable to operation, low pressure Start and stop are respond well, long service life.
Brief description
Fig. 1 is that (wherein, A represents high-pressure side for the mechanical seal end surface structural representation of the present invention；B represents low-pressure side).
Fig. 2 is the part typical structure schematic diagram of the curved groove of the present invention, and wherein in figure curved groove is to wait deep type groove.
Fig. 3 is the part typical structure schematic diagram of the curved groove of the present invention, and wherein in figure curved groove is that radially ladder is received The convergence type groove held back.
Fig. 4 is the part typical structure schematic diagram of the curved groove of the present invention, and wherein in figure curved groove is is in radially gradual change The convergence type groove of convergence.
Fig. 5 is the part typical structure schematic diagram of the curved groove of the present invention, and wherein in figure curved groove is from cosine curve two The convergence type groove of lateral its symmetrical center line convergence.
Fig. 6 is the part typical structure schematic diagram (omitting curved groove, ring dam and sealing weir) of the microflute of the present invention.
Specific embodiment
Further illustrate the present invention below in conjunction with the accompanying drawings
Referring to the drawings：
A kind of embodiment 1 cosine curve type mechanical seal end surface structure of the present invention, including the rotating ring of mechanical seal And stationary ring, the seal face outer end of described rotating ring and described stationary ring is upstream as high-pressure side, seal face the inner conduct Low-pressure side is downstream, and described seal face 1 low-pressure side is provided with smooth and continuous ring packing dam 11；Described seal face High-pressure side is provided with multiple periodic distribution curved grooves 12, and described curved groove 12 is circumferentially arranged into along corresponding seal face with close Envelope end face center is the annular in the center of circle, and the side line of rabbet joint of curved groove 12 is the cosine curve of half period, and cosine curve Along seal face radial distribution, the opening of cosine curve is located at the upstream of seal face to axis of symmetry, and the summit of cosine curve is located at The upstream of ring dam 11, and the both sides of each curved groove 12 are equipped with symmetrical microflute 13；Described seal face 1 Between the curved groove of ring dam upstream, unslotted region is provided with the sealing weir 14 for current limliting and static seal.
Described curved groove 12 is to wait deep type groove Fig. 2 or is in radially that ladder restrains type groove Fig. 3 or gradual change restrains Convergence type groove Fig. 4, or convergence type groove Fig. 5 restraining to its symmetrical center line gradual change from cosine curve.
The periodicity of curved groove 12 is：6～20.
The groove depth scope of described curved groove 12 is：1～30 μm.
When sealing medium is liquid, groove depth scope is：10～30 μm.
When sealing medium is gas, groove depth scope is：1～10 μm.
Described microflute 13 is symmetrically distributed in the both sides of curved groove 12, and microflute 13 is drawn close to curved groove, and described microflute 13 is radially Size and the circumferential size respectively less than radial direction of curved groove 12 or circumferential size.
The shape of described microflute 13 includes polygon 131, circle 132, oval 133 and curl polygon 134.
Described microflute 13 is polygon and curl polygon, then described polygon and curl polygon should and seals dam Area is tangent or overlaps.
The width of described curved groove 12 is wr, wherein 0<wr<W, w are seal face width.
The operation principle of the present invention：Segment fluid flow in 1 fluid film of seal face under pressure reduction stream and shear flow act on, Flow to downstream inner radius, lubricate end face simultaneously, form leakage stream.A part of fluid enters longitudinal cosine type curved groove 12, in upstream side Longitudinal cosine type curved groove 12 opening is larger, can form stronger hydrostatic pressure effect, and downstream side is gradually reduced, and can effectively subtract Small leak.Longitudinal cosine type curved groove 12 is in radially all convergence gap in a different manner, therefore longitudinal cosine type curved groove 12 root can produce Raw obvious hydrodynamic effect, to form higher-pressure region, can effectively improve bearing capacity, simultaneously because both sides microflute 13 Presence can produce pumping effect so that leakage greatly reduces.Because longitudinal cosine type curved groove 12 has symmetrical smoothly transitting Profile, relatively easily the solid particle in groove can be taken out of, substantially reduce the abrasion of seal face, increase sealing simultaneously The fluid of end face and the exchange of medium side liquid, can be effectively reduced the temperature of seal face.Longitudinal cosine type curved groove 12 both sides Bottom land fluid, in addition to providing fluid dynamic and static pressure effect, also can be pumped by microflute 13 to high-pressure side, partly makes up the cause of pressure reduction conductance Fluid leaks.Under the conditions of physical dimension identical, the mechanical sealing of the present invention is compared to similar Hydrodynamic pressure type machine Tool seals, so that pumping effect greatly enhances on the premise of ensureing enough hydrodynamic effects, can keep higher Fluid film bearing capacity and fluid film rigidity, there is excellent lubrication effect, substantially reduce sealing fluid to low pressure The leakage rate of side and end-face friction heat, also have stronger flushing action simultaneously, improve the ability of anti-solid particle, sealing Operational reliability strengthens, and slip declines.
Content described in this specification embodiment is only enumerating of the way of realization to inventive concept, the protection of the present 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 according to present inventive concept it is conceivable that equivalent technologies mean.

Claims (9)

1. a kind of cosine curve type mechanical seal end surface structure, the rotating ring including mechanical seal and stationary ring, described rotating ring and institute The seal face outer end of the stationary ring stated is upstream as high-pressure side, and seal face is inner to be downstream as low-pressure side, and its feature exists In：Described seal face low-pressure side is provided with smooth and continuous ring packing dam；Described seal face high-pressure side is provided with many Individual periodic distribution curved groove, described curved groove is circumferentially arranged into seal face center as the center of circle along corresponding seal face Annular, the side line of rabbet joint of curved groove is the cosine curve of half period, and the axis of symmetry of cosine curve is along sealed end face diameter To distribution, the opening of cosine curve is located at the upstream of seal face, and the summit of cosine curve is located at the upstream of ring dam, and often The both sides of individual curved groove are equipped with symmetrical microflute；Described seal face is located at not to be opened between the curved groove of ring dam upstream Groove region is provided with the sealing weir for current limliting and static seal.
2. as claimed in claim 1 a kind of cosine curve type mechanical seal end surface structure it is characterised in that：Described curved groove For etc. deep type groove or be in radially that ladder restrains type groove or the convergence type groove of gradual change convergence, or right to it from cosine curve Claim the convergence type groove of centrage gradual change convergence.
3. as claimed in claim 2 a kind of cosine curve type mechanical seal end surface structure it is characterised in that：The cycle of curved groove Number is：6～20.
4. as claimed in claim 3 a kind of cosine curve type mechanical seal end surface structure it is characterised in that：Described curved groove Groove depth scope is：1～30 μm.
5. as claimed in claim 4 a kind of cosine curve type mechanical seal end surface structure it is characterised in that：Sealing medium is liquid During body, groove depth scope is：10～30 μm.
6. as claimed in claim 4 a kind of cosine curve type mechanical seal end surface structure it is characterised in that：Sealing medium is gas During body, groove depth scope is：1～10 μm.
7. as claimed in claim 1 a kind of cosine curve type mechanical seal end surface structure it is characterised in that：Described microflute is symmetrical It is distributed in the both sides of curved groove, microflute is drawn close to curved groove, described microflute radial dimension and circumferential size are respectively less than curved groove Radial direction or circumferential size.
8. as claimed in claim 7 a kind of cosine curve type mechanical seal end surface structure it is characterised in that：The shape of described microflute Shape includes polygon, circle, ellipse and curl polygon.
9. as claimed in claim 8 a kind of cosine curve type mechanical seal end surface structure it is characterised in that：Described microflute is many Side shape and curl polygon, then described polygon and curl polygon should or coincidences tangent with seals dam area.
CN201610607046.9A 2016-07-28 2016-07-28 A kind of cosine curve type mechanical seal end surface structure Active CN106439023B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110500409A (en) * 2019-09-11 2019-11-26 浙江工业大学 A kind of micro-bulge cluster mechanical face seals with reduction microorganism adhesive function
CN110899445A (en) * 2019-12-17 2020-03-24 浙江普兴电子科技有限公司 Mold and method for preparing sine type deployable sealing structure by spinning process
CN111656065A (en) * 2018-02-01 2020-09-11 伊格尔工业股份有限公司 Sliding component
US11603934B2 (en) 2018-01-12 2023-03-14 Eagle Industry Co., Ltd. Sliding component
US11913454B2 (en) 2020-07-06 2024-02-27 Eagle Industry Co., Ltd. Sliding component
US11933303B2 (en) 2020-07-06 2024-03-19 Eagle Industry Co., Ltd. Sliding component

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EP3922874A4 (en) 2019-02-04 2022-11-09 Eagle Industry Co., Ltd. Sliding component
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CN104265900A (en) * 2014-08-06 2015-01-07 浙江工业大学 Two-way rotating gas dynamic/static pressure mechanical seal type bird wing-shaped groove structure
CN103122998B (en) * 2013-02-26 2015-10-28 浙江工业大学 Imitative sharkskin streamline type groove end surface mechanical sealing structure
CN205978439U (en) * 2016-07-28 2017-02-22 浙江工业大学 Cosine curve type mechanical seal terminal surface structure

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JPH04337165A (en) * 1991-05-09 1992-11-25 Nippon Pillar Packing Co Ltd Non-contact type mechanical seal device
CN101603597B (en) * 2009-06-30 2013-03-06 张家港市金鹰密封件厂 Friction ring of mechanical sealing device
CN201771741U (en) * 2010-06-30 2011-03-23 上海乐合流体机械有限公司 Mechanical seal device for high speed pump
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11603934B2 (en) 2018-01-12 2023-03-14 Eagle Industry Co., Ltd. Sliding component
CN111656065A (en) * 2018-02-01 2020-09-11 伊格尔工业股份有限公司 Sliding component
US11619308B2 (en) 2018-02-01 2023-04-04 Eagle Industry Co., Ltd. Sliding components
CN110500409A (en) * 2019-09-11 2019-11-26 浙江工业大学 A kind of micro-bulge cluster mechanical face seals with reduction microorganism adhesive function
CN110500409B (en) * 2019-09-11 2024-06-07 浙江工业大学 Micro-convex body cluster surface mechanical seal with function of reducing microbial adhesion
CN110899445A (en) * 2019-12-17 2020-03-24 浙江普兴电子科技有限公司 Mold and method for preparing sine type deployable sealing structure by spinning process
CN110899445B (en) * 2019-12-17 2021-08-13 浙江普兴电子科技有限公司 Mold and method for preparing sine type deployable sealing structure by spinning process
US11913454B2 (en) 2020-07-06 2024-02-27 Eagle Industry Co., Ltd. Sliding component
US11933303B2 (en) 2020-07-06 2024-03-19 Eagle Industry Co., Ltd. Sliding component

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