CN107906206A - It is a kind of can bidirectional rotation barrel cover type groove end surface mechanical sealing structure - Google Patents
It is a kind of can bidirectional rotation barrel cover type groove end surface mechanical sealing structure Download PDFInfo
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- CN107906206A CN107906206A CN201711459722.3A CN201711459722A CN107906206A CN 107906206 A CN107906206 A CN 107906206A CN 201711459722 A CN201711459722 A CN 201711459722A CN 107906206 A CN107906206 A CN 107906206A
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- Prior art keywords
- groove
- dynamic pressure
- cell wall
- barrel cover
- cover type
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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
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Sealing (AREA)
Abstract
The invention discloses it is a kind of can bidirectional rotation barrel cover type groove end surface mechanical sealing structure, rotating ring and stationary ring including mechanical seal, multiple barrel cover type fluid dynamic pressure grooves being uniformly distributed circumferentially are provided with least one seal face of the rotating ring or stationary ring, the dynamic pressure groove is symmetrical on its own radial centre lines, the dynamic pressure groove includes sequentially connected notch, cell wall and groove root, the notch is arranged on the high-pressure side of the seal face, the groove root is arranged on the low-pressure side of the seal face, the cell wall includes sequentially connected rectangular groove wall and taper cell wall, the rectangular groove wall is connected with the small conical surface of the taper cell wall, the big conical surface of the taper cell wall, which is connected with the groove root and forms pointed shape, restrains structure.Planform of the present invention is simple in structure, and easy to design production, when the rotating ring of the device is with rotation axis forward direction or counter-rotating, fluid film that is continuous, stablizing can be formed between dynamic and static ring seal face.
Description
Technical field
The present invention relates to it is a kind of can bidirectional rotation non-contact hydrodynamic mechanical seal end face structure, particularly relate to
And it is a kind of can bidirectional rotation barrel cover type groove end surface mechanical sealing structure.
Background technology
Mechanical seal be divided into contact with it is contactless.Operationally seal face does not connect mutually non-contact mechanical seal
Touch, without abrasion, power consumption is very small, can also be worked normally under the operating mode of high speed and high pressure for end face.With common contact-type machinery
The characteristics of sealing is compared, and non-contact mechanical seal is maximum is the shallow slot for having deep about a few micrometers to several millimeters on its seal face
Or deep trouth.When the shaft is rotated, these grooves can produce hydrodynamic, make to keep a few micrometers of minim gap between seal face,
It is air film or liquid film between gap, frictional force is very small when seal face rotates against at a high speed at this time, and due to seal face
Between gap it is very small, pass through leakage rate therebetween also very little.The key problem in technology point of non-contact mechanical seal is seal face
On groove profile, different groove profiles has different hydrodynamic characteristics, therefore, occurs the dynamic of various shapes structure in practical
Indent.Groove profile such as patent US5222743, US5947481, CN01102213.2, US6726213B2 available for bidirectional rotation,
CN201210034116.8, CN201310059819.0 etc. once disclosed report.Opening up for dynamic pressure groove will not only have preferable shape
Shape will also be conducive to fabricate to improve dynamic pressure effect and adverse current pumping effect, easy to process to reduce production cost.It is two-way
Although groove is unrestricted to the direction of rotation of axis, its hydrodynamic characteristic is not strong, fluid film insufficient rigidity.Most of two-way groove profiles
Since the hydrodynamic characteristic for lacking enough causes seal face gap too small, system pressure fluctuation at this time and rotor disturbance are often led
End face collision is caused, makes sealing surface wear and premature failure.
The content of the invention
For solve above technical problem, the present invention provide it is a kind of have good hydrodynamic effect can bidirectional rotation barrel cover
Type groove end surface mechanical sealing structure, when the rotating ring of the device is with rotation axis forward direction or counter-rotating, between dynamic and static ring end face
Stable fluid film can be formed.
To achieve the above object, the present invention provides following technical solution：
The present invention provides it is a kind of can bidirectional rotation barrel cover type groove end surface mechanical sealing structure, including mechanical seal is dynamic
Ring and stationary ring, are provided with multiple barrel cover type streams being uniformly distributed circumferentially at least one seal face of the rotating ring or stationary ring
Body dynamic pressure groove, the dynamic pressure groove is symmetrical on its own radial centre lines, and the dynamic pressure groove includes sequentially connected notch, cell wall
With groove root, the notch is arranged on the high-pressure side of the seal face, and the groove root is arranged on the low-pressure side of the seal face,
The cell wall includes sequentially connected rectangular groove wall and taper cell wall, the rectangular groove wall and the small conical surface phase of the taper cell wall
Connection, the big conical surface of the taper cell wall, which is connected with the groove root and forms pointed shape, restrains structure.
Optionally, drainage trough is provided with the dynamic pressure groove, the drainage trough extends to the groove root from the notch.
Optionally, the face of the groove root is the arcwall face concentric with the rotating ring or stationary ring.
Optionally, the dynamic pressure groove is to wait deep trouth.
Optionally, the groove depth of the dynamic pressure groove is 1~100 μm.
Optionally, the dynamic pressure groove is groove with variable depth, is radially gradually become shallower as from the notch to the groove root, circumferencial direction by
Cell wall described in the center line to both sides of the dynamic pressure groove gradually becomes shallower as.
Optionally, the drainage trough is to wait deep trouth.
Optionally, the groove depth of the drainage trough is 1~50 μm, and the width of the drainage trough is 0.5~4mm.
Optionally, the radical length ratio of the rectangular groove wall and the dynamic pressure groove is 0.2~0.8, the notch with it is described
The width ratio of groove root is 0.2~0.8, and the angle of the taper cell wall is 20 °~160 °.
The present invention achieves following technique effect relative to the prior art：
It is provided by the invention it is a kind of can bidirectional rotation barrel cover type groove end surface mechanical sealing structure shape and structure it is simple, be easy to
Design production；When the rotating ring of the device is with rotation axis forward direction or counter-rotating, can be formed between dynamic and static ring seal face
Continuously, the fluid film stablized；The big conical surface of taper cell wall is connected with groove root and forms pointed shape convergence structure, in this region
Flow area is obviously reduced, after fluid is compressed, this region formed higher-pressure region, can be obviously improved fluid film membrane pressure and just
Degree, effectively improves the stability of two-way chute；When machine is run, rotating ring rotation, produces relative motion, at this time dynamic pressure groove with stationary ring
The first rectangular groove wall and the first taper cell wall (or the second rectangular groove wall and second taper cell wall) be upstream face, opposite side second
Rectangular groove wall is back side with the second taper cell wall (or the first rectangular groove wall and first taper cell wall), in sealing ring surface and fluid
Shear action under, the bootable fluid of upstream face is pumped into dynamic pressure groove, and back side plays the work for draining out fluid in dynamic pressure groove
With can effectively reduce by the leakage rate of sealing fluid and avoid the possibility that impurity particle in fluid deposits in groove.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structure diagram of the barrel cover type groove end face in the present invention；
Fig. 2 is the dynamic pressure slot structure schematic diagram that drainage trough is provided with the present invention；
Fig. 3 is A-A schematic diagram of the dynamic pressure groove when depth in Fig. 2；
Fig. 4 is A-A schematic diagrames when dynamic pressure groove deepens in Fig. 2；
Fig. 5 is B-B schematic diagrames when dynamic pressure groove deepens in Fig. 2；
Description of reference numerals：1 --- rotating ring；2 --- dynamic pressure groove；21 --- the first rectangular groove wall；22 --- the second rectangle
Cell wall；23 --- the first taper cell wall；24 --- the second taper cell wall；3 --- groove root；4 --- notch；5 --- drainage trough；
A --- low-pressure side；B --- high-pressure side；The radical length of L1 --- rectangular groove wall；Total radical length of L2 --- dynamic pressure groove；
The width of L3 --- notch；L4 --- the width of groove root；The width of L5 --- drainage trough；The groove depth of H1 --- dynamic pressure groove；
The groove depth of H2 --- drainage trough；The exradius of Ro --- rotating ring or stationary ring；The inner circle radius of Ri --- rotating ring or stationary ring；
Rg --- the radius of groove root；The angle that β 1 --- a points are formed with the line and c points of center of circle O and the line of center of circle O；β 2 --- b points
The angle formed with line and the c point of center of circle O with the line of center of circle O；β 3 --- the first taper cell wall and the second taper cell wall
Angle.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, it is below in conjunction with the accompanying drawings and specific real
Mode is applied to be described in further detail invention.
As shown in Figs. 1-5, the present invention provide it is a kind of can bidirectional rotation barrel cover type groove end surface mechanical sealing structure, including machine
The rotating ring and stationary ring of tool sealing, are provided with multiple be uniformly distributed circumferentially at least one seal face of the rotating ring or stationary ring
Barrel cover type fluid dynamic pressure groove 2, in this present embodiment, as shown in Figure 1, elect as be provided with the seal face of rotating ring 1 it is multiple
The barrel cover type fluid dynamic pressure groove 2 being uniformly distributed circumferentially, dynamic pressure groove 2 is symmetrical on its own radial centre lines, and dynamic pressure groove 2 includes
Sequentially connected notch 4, cell wall and groove root 3, notch 4 are arranged on the high-pressure side B of the seal face, and groove root 3 is arranged on described
The low-pressure side A of seal face, the cell wall include sequentially connected rectangular groove wall and taper cell wall, the rectangular groove wall with it is described
The small conical surface of taper cell wall is connected, and the big conical surface of the taper cell wall, which is connected with the groove root and forms pointed shape convergence, to be tied
Structure.It is obviously reduced in pointed shape convergence structural region flow area, after fluid is compressed, higher-pressure region is formed in this region, can be with
The membrane pressure and rigidity of fluid film are obviously improved, effectively improves the stability of two-way chute.
In this present embodiment, as shown in Figs. 1-2, the rectangular groove wall includes the first rectangular groove wall 21 and the second rectangular groove wall
22, the taper cell wall includes the first taper cell wall 23 and the second taper cell wall 24, the first rectangular groove wall 21 and the first cone tank
Wall 23 connects, and the second rectangular groove wall 22 is connected with the second taper cell wall 24.
For the ease of air storage reservoir, the lubricity between rotating ring and stationary ring is improved, rotating ring and stationary ring when avoiding machine startup
Situation about mutually killing occurs, and in this present embodiment, as shown in Fig. 2, be provided with drainage trough 5 on dynamic pressure groove 2, drainage trough 5 is from groove
Mouth 4 extends to groove root 3, and dynamic pressure groove 2 is symmetrical on its own radial centre lines, and drainage trough 5 is on its own radial centre lines pair
Claim.Meanwhile drainage trough 5 can also store the impurity particle in fluid, prevent impurity particle from destroying the sealing of rotating ring 1 and stationary ring
Face.In this present embodiment, drainage trough 5 is chosen as waiting deep trouth, and the optional value range of the groove depth H2 of drainage trough 5 is 1~50 μm, is drawn
The optional value range of the width L5 of chute 5 is 0.5~4mm.
In order to make the membrane pressure of fluid film be more evenly distributed, the face of groove root 3 is arranged to the arc concentric with the rotating ring or stationary ring
Shape face, in this present embodiment, as shown in Figs. 1-2, the face of groove root 3 is arranged to the arcwall face concentric with rotating ring 1, center of circle O.
In this present embodiment, as Figure 2-3, dynamic pressure groove 2 is to wait deep trouth, the optional value ranges of groove depth H1 of dynamic pressure groove 2
For 1~100 μm.In another embodiment, as shown in Fig. 2,4,5, dynamic pressure groove 2 is groove with variable depth, radially from notch 4 to groove root 3 by
Gradual change is shallow, and circumferencial direction cell wall described in the center line to both sides of dynamic pressure groove 2 gradually becomes shallower as.When dynamic pressure groove 2 is groove with variable depth, become
The runner area of passage convergence of deep trouth 2 is stronger, is further constantly reduced from notch 4 to 3 flow area of groove root, with waiting deep trouth
Dynamic pressure groove 2 is compared, and can produce the membrane pressure and rigidity of bigger.
In this present embodiment, as shown in Figs 1-4, total radical length L2 of the radical length L1 of rectangular groove wall and dynamic pressure groove 2
The ratio between be L1/L2=0.2~0.8；The ratio between the width L3 of notch 4 and the width L4 of groove root 3 are L3/L4=0.2~0.8；Groove dam
Than (Ro-Rg)/(Ro-Ri)=0.2~0.9；Groove weir is than 2/ β 1=0.2~0.8 of β；The angle of taper cell wall i.e. the first cone tank
The angle of 23 and second taper cell wall 24 of wall is 20 °~160 °.
It is provided by the invention it is a kind of can bidirectional rotation barrel cover type groove end surface mechanical sealing structure, when machine is run, move
Ring 1 rotates, and relative motion is produced with stationary ring, and the first rectangular groove wall 21 of dynamic pressure groove 2 is to meet water with the first taper cell wall 23 at this time
Face, correspondingly, opposite side the second rectangular groove wall 22 and the second taper cell wall 24 are back side (or the second rectangular channel of dynamic pressure groove 2
22 and second taper cell wall 24 of wall is upstream face, correspondingly, the first rectangular groove wall 21 and the first taper cell wall 23 are back side),
Under the shear action of sealing ring surface and fluid, the bootable fluid of upstream face is pumped into dynamic pressure groove 2, and the back side rises
The effect that fluid drains out in by dynamic pressure groove 2, can effectively reduce by the leakage rate of sealing fluid and avoid impurity in fluid
The possibility that particle deposits in groove, the present invention in can bidirectional rotation barrel cover type groove end surface mechanical sealing structure shape and structure letter
It is single, easy to design production, when the rotating ring of the device is with rotation axis forward direction or counter-rotating, between dynamic and static ring seal face
Fluid film that is continuous, stablizing can be formed.
Apply specific case in this specification to be set forth the principle of the present invention and embodiment, above example
Explanation be only intended to help understand the present invention method and its core concept；Meanwhile for those of ordinary skill in the art,
According to the thought of the present invention, in specific embodiments and applications there will be changes.In conclusion in this specification
Appearance should not be construed as limiting the invention.
Claims (9)
1. it is a kind of can bidirectional rotation barrel cover type groove end surface mechanical sealing structure, include the rotating ring and stationary ring of mechanical seal, it is special
Sign is, multiple barrel cover type fluids being uniformly distributed circumferentially are provided with least one seal face of the rotating ring or stationary ring
Dynamic pressure groove, the dynamic pressure groove is symmetrical on its own radial centre lines, the dynamic pressure groove include sequentially connected notch, cell wall and
Groove root, the notch are arranged on the high-pressure side of the seal face, and the groove root is arranged on the low-pressure side of the seal face, institute
Stating cell wall includes sequentially connected rectangular groove wall and taper cell wall, and the rectangular groove wall is connected with the small conical surface of the taper cell wall
Connect, the big conical surface of the taper cell wall, which is connected with the groove root and forms pointed shape, restrains structure.
2. it is according to claim 1 can bidirectional rotation barrel cover type groove end surface mechanical sealing structure, it is characterised in that it is described
Drainage trough is provided with dynamic pressure groove, the drainage trough extends to the groove root from the notch.
3. it is according to claim 1 can bidirectional rotation barrel cover type groove end surface mechanical sealing structure, it is characterised in that it is described
The face of groove root is the arcwall face concentric with the rotating ring or stationary ring.
4. it is according to claim 1 or 2 can bidirectional rotation barrel cover type groove end surface mechanical sealing structure, it is characterised in that
The dynamic pressure groove is to wait deep trouth.
5. it is according to claim 4 can bidirectional rotation barrel cover type groove end surface mechanical sealing structure, it is characterised in that it is described
The groove depth of dynamic pressure groove is 1~100 μm.
6. it is according to claim 1 or 2 can bidirectional rotation barrel cover type groove end surface mechanical sealing structure, it is characterised in that
The dynamic pressure groove is groove with variable depth, is radially gradually become shallower as from the notch to the groove root, circumferencial direction is by the dynamic pressure groove
Heart line gradually becomes shallower as to cell wall described in both sides.
7. it is according to claim 2 can bidirectional rotation barrel cover type groove end surface mechanical sealing structure, it is characterised in that it is described
Drainage trough is to wait deep trouth.
8. it is according to claim 7 can bidirectional rotation barrel cover type groove end surface mechanical sealing structure, it is characterised in that it is described
The groove depth of drainage trough is 1~50 μm, and the width of the drainage trough is 0.5~4mm.
9. it is according to claim 1 can bidirectional rotation barrel cover type groove end surface mechanical sealing structure, it is characterised in that it is described
The radical length ratio of rectangular groove wall and the dynamic pressure groove is 0.2~0.8, the width ratio of the notch and the groove root for 0.2~
0.8, the angle of the taper cell wall is 20 °~160 °.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711459722.3A CN107906206A (en) | 2017-12-28 | 2017-12-28 | It is a kind of can bidirectional rotation barrel cover type groove end surface mechanical sealing structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711459722.3A CN107906206A (en) | 2017-12-28 | 2017-12-28 | It is a kind of can bidirectional rotation barrel cover type groove end surface mechanical sealing structure |
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| CN107906206A true CN107906206A (en) | 2018-04-13 |
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| CN201711459722.3A Pending CN107906206A (en) | 2017-12-28 | 2017-12-28 | It is a kind of can bidirectional rotation barrel cover type groove end surface mechanical sealing structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109488769A (en) * | 2018-12-20 | 2019-03-19 | 丹东克隆集团有限责任公司 | Double mechanical seal with bidirectional screw pumping ring seal liquid circulation mechanism |
| CN110822084A (en) * | 2019-11-19 | 2020-02-21 | 潍柴动力股份有限公司 | Sealing member and engine |
| CN113330225A (en) * | 2019-02-04 | 2021-08-31 | 伊格尔工业股份有限公司 | Sliding component |
| WO2021200938A1 (en) * | 2020-03-31 | 2021-10-07 | イーグル工業株式会社 | Sliding component |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109488769A (en) * | 2018-12-20 | 2019-03-19 | 丹东克隆集团有限责任公司 | Double mechanical seal with bidirectional screw pumping ring seal liquid circulation mechanism |
| CN109488769B (en) * | 2018-12-20 | 2024-01-16 | 丹东克隆集团有限责任公司 | Double-end-face mechanical seal with bidirectional spiral pumping ring sealing liquid circulation mechanism |
| CN113330225A (en) * | 2019-02-04 | 2021-08-31 | 伊格尔工业股份有限公司 | Sliding component |
| KR20210113365A (en) * | 2019-02-04 | 2021-09-15 | 이구루코교 가부시기가이샤 | sliding parts |
| US20220128088A1 (en) * | 2019-02-04 | 2022-04-28 | Eagle Industry Co., Ltd. | Sliding component |
| CN113330225B (en) * | 2019-02-04 | 2023-08-22 | 伊格尔工业股份有限公司 | Sliding member |
| US11852241B2 (en) * | 2019-02-04 | 2023-12-26 | Eagle Industry Co., Ltd. | Sliding component |
| KR102634941B1 (en) * | 2019-02-04 | 2024-02-08 | 이구루코교 가부시기가이샤 | sliding parts |
| CN110822084A (en) * | 2019-11-19 | 2020-02-21 | 潍柴动力股份有限公司 | Sealing member and engine |
| CN110822084B (en) * | 2019-11-19 | 2021-12-21 | 潍柴动力股份有限公司 | Sealing member and engine |
| WO2021200938A1 (en) * | 2020-03-31 | 2021-10-07 | イーグル工業株式会社 | Sliding component |
| JP7480278B2 (en) | 2020-03-31 | 2024-05-09 | イーグル工業株式会社 | Sliding parts |
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Inventor after: Liang Kaihong Inventor after: Chen Yan Inventor before: Liang Kaihong |
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Effective date of registration: 20180328 Address after: No. 29, Kang Hong Xi Road, Three Creek Industrial Zone, Ouhai, Wenzhou, Zhejiang Applicant after: Wenzhou Trisum Seal Manufacturing Co.,Ltd. Applicant after: Chen Yan Address before: No. 29, Kang Hong Xi Road, Three Creek Industrial Zone, Ouhai, Wenzhou, Zhejiang Applicant before: Wenzhou Trisum Seal Manufacturing Co.,Ltd. |
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