CN107166036A - A kind of low leakage helicla flute liquid film mechanical sealing end face structure - Google Patents
A kind of low leakage helicla flute liquid film mechanical sealing end face structure Download PDFInfo
- Publication number
- CN107166036A CN107166036A CN201710472773.3A CN201710472773A CN107166036A CN 107166036 A CN107166036 A CN 107166036A CN 201710472773 A CN201710472773 A CN 201710472773A CN 107166036 A CN107166036 A CN 107166036A
- Authority
- CN
- China
- Prior art keywords
- groove
- face
- liquid film
- helicla flute
- reverse acting
- 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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Classifications
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- 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
- F16J15/3436—Pressing means
- F16J15/3448—Pressing means the pressing force resulting from fluid pressure
-
- 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
Abstract
A kind of low leakage helicla flute liquid film mechanical sealing end face structure, rotating ring including mechanical seal, stationary ring, the side of rotating ring or the stationary ring end face is that high-pressure side is upstream, the opposite side of rotating ring or the stationary ring end face is that low-pressure side is downstream, the end face of one of rotating ring or stationary ring is provided with serial chute, downstream is provided with the circumferential serial reverse acting spiral groove uniformly arranged, middle part is provided with the annular groove with the reverse acting spiral groove insertion, upstream side is provided with the outlet connected with the annular groove and side medium, provided with serial transport screw groove between two neighboring described outlet, seals dam is set between the reverse acting spiral groove and downstream, sealing weir is set between the annular groove and the transport screw groove.The present invention provide it is a kind of easily realized under various complex working conditions low leakage, excellent tribological property, load-carrying properties and have good stability, the low leakage helicla flute liquid film mechanical sealing end face structure of service life length.
Description
Technical field
The present invention relates to the low leakage helicla flute liquid film mechanical sealing end face structure of one kind, it is adapted to the shaft end under low pressure operating mode
Shaft end seal in sealing, such as automobile engine cooling water pump water seal, wind-powered electricity generation and tidal power generation unit gear speedup case, also may be used
Shaft end seal applied to miscellaneous equipments such as centrifugal pumps under low pressure operating mode.
Background technology
There is the mechanical seal largely run under low pressure operating mode in produce reality, such as automobile engine cooling water pump is used
Water seal etc..Often there is problems with such sealing：Mechanical seal end surface is often difficult to noncontact and causes seal face
Fretting wear is serious so as to easily fail, and the presence because of seal clearance if end face noncontact is realized can produce larger leakage.For
This often uses Surface Texture technology in engineering or research, and the bearing capacity of mechanical seal is improved come real by reasonably designing
The noncontact of existing end face improves pumping reflux capability to improve sealing property so as to increase the service life.
United States Patent (USP) (US4290611) discloses upstream pumping mechanical seal, it is proposed that pumping concept, subsequent upstream
Pumping technology is widely used in mechanical seal field.United States Patent (USP) (US5529317 and US7194803), which is disclosed, to be had
Pump the laser face end face seal of backflow functionality, domestic patent ZL200920043048.5 discloses a kind of with similar functions
Mechanical seal, combines pumping technology and water conservancy diversion technique of backflow.Although above-mentioned domestic and international mechanical seal patented technology is improved
The sealing property of mechanical seal, but still suffer from problems with：Although employing pumping technology or while employing water conservancy diversion
Technique of backflow improves sealing property, but use condition is harsher, and load-carrying properties and sealing property synergy be not strong.
The generally existing cavitation phenomenon in liquid-film lubrication mechanical seal, and the bubble that cavitation phenomenon is produced can reduce end face and rub
Wipe, realize cavitation drag reduction, and cavitation area can cause pressure difference stream due to its relatively low film pressure, downstream side liquid is drawn into close
End-blocking face so as to improve sealing property (thunder row step-annular groove end face seal mechanism and performance study [J] tribology journals,
2016,36(5):585-591), thus can be designed by rational texture, further improve using the liquid film cavitation of seal face
Sealing property.
The content of the invention
In order to overcome, the sealing property of existing machinery Sealing Technology is bad, liquid film load-carrying properties are poor, the reality under low pressure operating mode
Existing noncontact stable operation is difficult, the deficiency that start-stop performance is not good, and present invention offer one kind is easily realized low under various complex working conditions
Leakage, excellent tribological property, load-carrying properties and have good stability, the low leakage helicla flute liquid film mechanical sealing of service life length
End face structure.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of low leakage helicla flute liquid film mechanical sealing end face structure, includes rotating ring, the stationary ring of mechanical seal, the rotating ring
Or the side of stationary ring end face is that high-pressure side is upstream, the opposite side of rotating ring or the stationary ring end face is that low-pressure side is downstream, rotating ring
Or the end face of one of stationary ring is provided with serial chute, downstream provided with the circumferential serial reverse acting spiral groove uniformly arranged, in
Portion is provided with the annular groove with the reverse acting spiral groove insertion, and upstream side is provided with the outlet connected with the annular groove and side medium, adjacent
Provided with serial transport screw groove between outlet described in two, seals dam is set between the reverse acting spiral groove and downstream, it is described
Sealing weir is set between annular groove and the transport screw groove.
Further, liquid film of the reverse acting spiral groove at sealing operation time slot root has the trend of diverging, reverse acting spiral
Groove number is 2~10；Reverse acting spiral cell wall line helical angle is 2 °~15 °；Circumferential slot platform is wide than being 0.5~10；Radial slot dam ratio
For 0.25~10, reverse acting spiral groove and seals dam radial width is seal f ace width 1/4~2/3, reverse acting spiral groove depth is 1
~50 μm.
Further, the annular groove radial width is 0.5~3mm；Annular groove depth for the reverse acting spiral groove depth 1~
5 times.
Further, it is described outlet upstream side be in period profile, periodicity be 4,6 or 8, exit wall line be helix or
Straight line, helical angle or inclination angle are 30 °~45 °, a width of 1 °~10 ° of circumferential slot, and outlet depth and the annular groove etc. are deep.
It is preferred that, liquid film of the transport screw groove at sealing operation time slot root has convergent trend, transport screw
Number between groove is exported adjacent two is 2~5；Transport screw cell wall line helical angle is 10 °~45 °；The wide ratio of circumferential slot platform is
0.5~3；Radial slot dam ratio is 0.25~10, transport screw groove and sealing weir radial direction overall width for seal f ace width 1/3~
2/3, transport screw groove depth is 1~20 μm.
The present invention technical concept be：The flowing of seal face liquid film is the mutual balance of pressure difference stream and shear flow.High pressure
Medium side liquid enters seal face gap due to pressure difference stream, due to the shear flow that the rotary motion of moving sealing ring is produced, fluid
Into upstream side transport screw groove, due to the convergence of liquid film gap at the transport screw groove groove root of upstream side, extrusion effect increases
Greatly, therefore higher-pressure region is produced in upstream side transport screw groove exit region.Because downstream helicla flute is backlass, the increasing of thickness
The region is caused to occur cavitation, due to the pressure difference stream that the low film pressure in cavitation area is caused, the segment fluid flow in Ba Qu and weir area greatly
Reverse acting spiral groove region is sucked into, is acted on finally by the water conservancy diversion backflow of annular groove and outlet by downstream fluid transport to upstream
Side, forms backflow pump function under the synergy of several type grooves.Due to stronger pumping reflux capability, solid particle etc. can
Taken out of seal face in time, while the frictional force of cavitation zone is relatively low, so as to may be such that fretting wear reduction.
Beneficial effects of the present invention are mainly manifested in：
(1) the reverse acting spiral groove in sealing ring end face downstream due to its diversity can make lubricating liquid film produce cavitation, series
Cavitation area is around whole seal face, so that controllable seal face thin film drainage, seal face is drawn into by downstream side liquid
Reverse acting spiral groove region.
(2) good pump is formed under the synergy of the swabbing effect in cavitation area, annular groove and the water conservancy diversion of outlet backflow effeet
Reflux capability is sent, low leakage even pumping is easily realized under the various operating modes under lower pressure.
(3) transport screw groove in upstream side can produce good hydrodynamic effect there is provided good liquid film bearing capacity, therefore
The sealing has excellent sealing property and good load-carrying properties simultaneously.
(4) due to stronger pumping reflux capability, solid particle etc. can be taken out of seal face in time, while cavitation zone
Frictional force it is relatively low so that may be such that fretting wear reduction, further extension sealing service life.
Brief description of the drawings
Fig. 1 is sign in the mechanical seal end surface Structural assignments schematic diagram of the present invention, figure：1 is reverse acting spiral groove；2 be ring
Groove；3 be outlet；4 be transport screw groove；51st, 52,53 be sealing weir；6 be seals dam.
Fig. 2 is the mechanical seal fluting end face geometric parameter schematic diagram of the present invention.
Fig. 3 is sign in the mechanical seal fluting end face depth schematic diagram of the present invention, figure：h1For reverse acting spiral groove depth, h2
For transport screw groove depth, haFor annular groove and outlet depth, h0For seal clearance.
Fig. 4 is mechanical seal fluting another case study on implementation of end face of the present invention, and outlet number is 6, and exit wall line is straight line, directly
Line inclination angle is3=30 °~45 °, reverse acting spiral slot number is that transport screw slot number is 2 between 8, adjacent outlets.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
The rotating ring of 1~Fig. 4 of reference picture, a kind of low leakage helicla flute liquid film mechanical sealing end face structure, including mechanical seal,
Stationary ring, the side of rotating ring or the stationary ring end face is that high-pressure side is upstream, and the opposite side of rotating ring or the stationary ring end face is low pressure
Side is downstream, and the end face of one of rotating ring or stationary ring is provided with serial chute, and downstream is provided with the circumferential series uniformly arranged
Reverse acting spiral groove 1, middle part is provided with and the annular groove 2 and medium provided with the annular groove 2 with the insertion of reverse acting spiral groove 1, upstream side
The outlet 3 of side connection, provided with serial transport screw groove 4, the reverse acting spiral groove 1 and downstream between described adjacent two outlet 3
Seals dam 6 is set between side, sealing weir 51,52 is set between the annular groove 2 and the transport screw groove 4.
Liquid film of the reverse acting spiral groove 1 at sealing operation time slot root has the trend of diverging, the number of reverse acting spiral groove 1
For 2~10；The wall line helical angle of reverse acting spiral groove 1 is α1=2 °~15 °；Circumferential slot platform is wide than being γg1/γw1=0.5~10；Footpath
It is (r to groove dam ratiog2-rg1)/(rg1-ri)=0.25~10, reverse acting spiral groove 1 is that sealing surface is wide with the radial width of seals dam 6
The 1/4~2/3 of degree, the depth of reverse acting spiral groove 1 is h1=1~50 μm.
The radial width of annular groove 2 is 0.5~3mm；The depth h of annular groove 2aFor the depth h of reverse acting spiral groove 111~5
Times.
The outlet 3 is in period profile in upstream side, and periodicity is 4,6 or is 8, and exit wall line is helix, helical angle
For α3=30 °~45 °, a width of γ of circumferential slotg3=1 °~10 °, 3 depth of outlet are deep with the grade of annular groove 2.
Liquid film of the transport screw groove 4 at sealing operation time slot root has convergent trend, and transport screw groove 4 is in phase
Number between the outlet of neighbour two 3 is 2~5；The wall line helical angle of transport screw groove 4 is α2=10 °~45 °；The wide ratio of circumferential slot platform is
γg2/γw2=0.5~3；Radial slot dam ratio is (ro-rg3)/(rg3-ra)=0.25~10, transport screw groove 4 and sealing weir 51
Radial direction overall width is the 1/3~2/3 of seal f ace width, and the depth of transport screw groove 4 is h2=1~20 μm.
Reference picture 1, the flowing of seal face liquid film is the mutual balance of pressure difference stream and shear flow.High-pressure medium side liquid by
Enter seal face gap in pressure difference stream, due to the shear flow that the rotary motion of moving sealing ring is produced, fluid is entering upstream side just
To helicla flute 4, due to the convergence in gap at the groove root of upstream side transport screw groove 4, extrusion effect increase, therefore in upstream side just
Higher-pressure region is produced to the exit region of helicla flute 4.Because downstream helicla flute 1 is backlass, the increase of thickness causes the region
Generation cavitation, due to the pressure difference stream that the low film pressure in cavitation area is caused, the segment fluid flow in dam area 6 and weir area 53 is sucked into instead
To the region of helicla flute 1, acted on finally by the water conservancy diversion backflow of annular groove 2 and outlet 3 by downstream fluid transport to upstream side, several
Plant and backflow pump function is formed under the synergy of type groove.Due to stronger pumping reflux capability, solid particle etc. can be timely
Seal face is taken out of, while the frictional force of cavitation zone is relatively low, so as to may be such that fretting wear reduction.
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 according to present inventive concept it is conceivable that equivalent technologies mean.
Claims (5)
1. a kind of low leakage helicla flute liquid film mechanical sealing end face structure, includes rotating ring, the stationary ring of mechanical seal, its feature exists
In：The side of rotating ring or the stationary ring end face is that high-pressure side is upstream, and the opposite side of rotating ring or the stationary ring end face is low-pressure side
That is downstream, the end face of one of rotating ring or stationary ring is provided with serial chute, and downstream is anti-provided with the circumferential series uniformly arranged
To helicla flute, middle part is provided with and connected with the annular groove and side medium provided with the annular groove with the reverse acting spiral groove insertion, upstream side
Outlet, provided with serial transport screw groove between two neighboring described outlet, set between the reverse acting spiral groove and downstream
Seals dam, sealing weir is set between the annular groove and the transport screw groove.
2. a kind of low leakage helicla flute liquid film mechanical sealing end face structure as claimed in claim 1, it is characterised in that：It is described anti-
There is the trend of diverging to liquid film of the helicla flute at sealing operation time slot root, reverse acting spiral groove number is 2~10；Reverse acting spiral
Cell wall line helical angle is 2 °~15 °；Circumferential slot platform is wide than being 0.5~10；Radial slot dam ratio be 0.25~10, reverse acting spiral groove with
Seals dam radial width is the 1/4~2/3 of seal f ace width, and reverse acting spiral groove depth is 1~50 μm.
3. a kind of low leakage helicla flute liquid film mechanical sealing end face structure as claimed in claim 1 or 2, it is characterised in that：Institute
Annular groove radial width is stated for 0.5~3mm；Annular groove depth is 1~5 times of the reverse acting spiral groove depth.
4. a kind of low leakage helicla flute liquid film mechanical sealing end face structure as claimed in claim 1 or 2, it is characterised in that：Institute
It is in period profile in upstream side to state outlet, and periodicity is 4,6 or 8, and exit wall line is helix or straight line, and helical angle or inclination angle are
30 °~45 °, a width of 1 °~10 ° of circumferential slot, outlet depth and the annular groove etc. are deep.
5. a kind of low leakage helicla flute liquid film mechanical sealing end face structure as claimed in claim 1 or 2, it is characterised in that：Institute
Stating liquid film of the transport screw groove at sealing operation time slot root has convergent trend, and transport screw groove is between adjacent two export
Number be 2~5；Transport screw cell wall line helical angle is 10 °~45 °；Circumferential slot platform is wide than being 0.5~3；Radial slot dam ratio is
0.25~10, transport screw groove is the 1/3~2/3 of seal f ace width, transport screw groove depth with sealing weir radial direction overall width
For 1~20 μm.
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| CN201710472773.3A CN107166036B (en) | 2017-06-21 | 2017-06-21 | A kind of low leakage helicla flute liquid film mechanical sealing end face structure |
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|---|---|---|---|
| CN201710472773.3A CN107166036B (en) | 2017-06-21 | 2017-06-21 | A kind of low leakage helicla flute liquid film mechanical sealing end face structure |
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| CN107166036A true CN107166036A (en) | 2017-09-15 |
| CN107166036B CN107166036B (en) | 2018-09-21 |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107859747A (en) * | 2017-12-21 | 2018-03-30 | 广东星联科技有限公司 | Using the extruder of movable sealing structure |
| CN109185461A (en) * | 2018-10-26 | 2019-01-11 | 清华大学 | The seal face structure of rotating machinery |
| CN110242751A (en) * | 2019-06-28 | 2019-09-17 | 清华大学 | The multi-level biserial slot seal face structure of rotating machinery |
| CN110566794A (en) * | 2019-09-09 | 2019-12-13 | 珠海格力节能环保制冷技术研究中心有限公司 | Lubricating structure and mechanical lubricating device with same |
| WO2020037643A1 (en) * | 2018-08-24 | 2020-02-27 | 苏州赫尔拜斯泵业有限公司 | Novel impeller centrifugal water pump |
| CN113454353A (en) * | 2019-02-21 | 2021-09-28 | 伊格尔工业股份有限公司 | Sliding component |
| CN114215742A (en) * | 2021-11-10 | 2022-03-22 | 浙江环誉泵业科技有限公司 | Low-leakage dynamic pressure fluid sealing end face structure with self-circulation backflow function |
| CN114320880A (en) * | 2021-11-10 | 2022-04-12 | 浙江环誉泵业科技有限公司 | Gear end face communication backflow groove with self-lubricating and self-cooling functions |
| CN114922978A (en) * | 2022-06-13 | 2022-08-19 | 江苏海洋大学 | Liquid membrane sealing ring with super-hydrophilic, super-smooth and flow guide characteristics and processing method thereof |
| US11608897B2 (en) | 2018-08-01 | 2023-03-21 | Eagle Industry Co., Ltd. | Slide component |
| US11815184B2 (en) | 2018-11-30 | 2023-11-14 | Eagle Industry Co., Ltd. | Sliding component |
| US11821521B2 (en) | 2018-12-21 | 2023-11-21 | Eagle Industry Co., Ltd. | Sliding component |
| US11821462B2 (en) | 2018-08-24 | 2023-11-21 | Eagle Industry Co., Ltd. | Sliding member |
| US11892081B2 (en) | 2019-07-26 | 2024-02-06 | Eagle Industry Co., Ltd. | Sliding component |
| US11933405B2 (en) | 2019-02-14 | 2024-03-19 | Eagle Industry Co., Ltd. | Sliding component |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107859747B (en) * | 2017-12-21 | 2023-12-15 | 广东星联科技有限公司 | Extruder adopting dynamic sealing structure |
| CN107859747A (en) * | 2017-12-21 | 2018-03-30 | 广东星联科技有限公司 | Using the extruder of movable sealing structure |
| US11608897B2 (en) | 2018-08-01 | 2023-03-21 | Eagle Industry Co., Ltd. | Slide component |
| US11821462B2 (en) | 2018-08-24 | 2023-11-21 | Eagle Industry Co., Ltd. | Sliding member |
| WO2020037643A1 (en) * | 2018-08-24 | 2020-02-27 | 苏州赫尔拜斯泵业有限公司 | Novel impeller centrifugal water pump |
| CN109185461A (en) * | 2018-10-26 | 2019-01-11 | 清华大学 | The seal face structure of rotating machinery |
| US11815184B2 (en) | 2018-11-30 | 2023-11-14 | Eagle Industry Co., Ltd. | Sliding component |
| US11821521B2 (en) | 2018-12-21 | 2023-11-21 | Eagle Industry Co., Ltd. | Sliding component |
| US11933405B2 (en) | 2019-02-14 | 2024-03-19 | Eagle Industry Co., Ltd. | Sliding component |
| CN113454353A (en) * | 2019-02-21 | 2021-09-28 | 伊格尔工业股份有限公司 | Sliding component |
| CN110242751A (en) * | 2019-06-28 | 2019-09-17 | 清华大学 | The multi-level biserial slot seal face structure of rotating machinery |
| US11892081B2 (en) | 2019-07-26 | 2024-02-06 | Eagle Industry Co., Ltd. | Sliding component |
| CN110566794B (en) * | 2019-09-09 | 2020-12-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Lubricating structure and mechanical lubricating device with same |
| CN110566794A (en) * | 2019-09-09 | 2019-12-13 | 珠海格力节能环保制冷技术研究中心有限公司 | Lubricating structure and mechanical lubricating device with same |
| CN114215742A (en) * | 2021-11-10 | 2022-03-22 | 浙江环誉泵业科技有限公司 | Low-leakage dynamic pressure fluid sealing end face structure with self-circulation backflow function |
| CN114320880A (en) * | 2021-11-10 | 2022-04-12 | 浙江环誉泵业科技有限公司 | Gear end face communication backflow groove with self-lubricating and self-cooling functions |
| CN114922978A (en) * | 2022-06-13 | 2022-08-19 | 江苏海洋大学 | Liquid membrane sealing ring with super-hydrophilic, super-smooth and flow guide characteristics and processing method thereof |
| CN114922978B (en) * | 2022-06-13 | 2023-10-24 | 江苏海洋大学 | Liquid film sealing ring with super-philic, super-smooth and diversion characteristics and processing method thereof |
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