CN107542934B - A kind of mechanical seal structure for imitating petal type groove - Google Patents
A kind of mechanical seal structure for imitating petal type groove Download PDFInfo
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- CN107542934B CN107542934B CN201711037952.0A CN201711037952A CN107542934B CN 107542934 B CN107542934 B CN 107542934B CN 201711037952 A CN201711037952 A CN 201711037952A CN 107542934 B CN107542934 B CN 107542934B
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- type groove
- petal type
- conduction hole
- sealing surface
- mechanical seal
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Abstract
A kind of mechanical seal structure for imitating petal type groove, including inner ring (2), outer ring (1) and sealing surface offer a certain number of petal type grooves on the sealing surface；Circumferencial direction equal distribution of each petal type groove along the mechanical sealing surface.The sealing surface includes sealing weir area (3) and seals dam area (4)；Non-slotted area part of the sealing weir area between two petal type grooves；The seals dam area is smooth torus shape planar section set between the end and inner ring of petal type groove.The petal type groove is made of diversion channel (51) and conduction hole (52).The diversion channel is ellipse, is radially outward radiated centered on conduction hole, and the diversion channel is 3~8 in sealing surface circumferencial direction equal distribution, the number of diversion channel；All diversion channels depth all having the same.The present invention imitates the circumferentially symmetrical type groove arrangement of petal type groove, is not only suitable for single direction rotation machinery and is also applied for bidirectional rotation machinery.
Description
Technical field
The present invention relates to a kind of mechanical seal structures for imitating petal type groove, belong to rotating machinery end face seal technical field.
Background technique
Mechanical seal is a kind of first to the preload of dynamic and static ring end face seal pair and pressure medium and elasticity by elastic element
The compression of part pressure and the axial end face sealing device for reaching sealing, therefore also known as end face seal.From last century mid-term generate with
Come, is widely used in the equipment such as centrifugal pump, centrifuge, reaction kettle and compressor with its unique performance advantage.With work
The continuous improvement of industry demand requires in practical application mechanical seal to adapt under the conditions of the extreme operating conditions such as high pressure, high speed, thus
To the performance of mechanical seal, more stringent requirements are proposed.
Current the most widely used mechanical seal is contacting mechanical seal and non-contact mechanical seal, contact type off-machine
When tool sealing starting, lacks fluid lubrication between end face and cause frictional heat to rise and supervene abrasion, deformation even hot tearing, because
This mechanical seal service life is shorter.And although this deficiency of contacting mechanical seal can be overcome for non-contact mechanical seal,
But almost all of non-contact mechanical seal will increase leakage rate, such as using face while reducing end wear now
Most wide Spiral Groove Mechanical Seal, direction of rotation can only a certain specific direction, a large amount of hard abrasive material pair is easily gathered in slot root
End face generates greatly friction, leads to seal failure.Therefore, the fretting wear for reducing seal face improves the opening force of end face
And operation when liquid film stability, reduce leakage rate become Development of Mechanical Seal critical issue.
The rotating ring and stationary ring (as shown in Figure 1) of existing mechanical seal structure are all cylindrical bodies: rear end face, cylinder
Face, front end face, what it is generally as sealing surface is front end face.The rotating ring and stationary ring of the mechanical seal, as shown in fig. 7, described dynamic
The side of the end face of ring and stationary ring is high-pressure side, that is, upstream, and the other side of the end face of the rotating ring and stationary ring is under low-pressure side is
It swims, offers multiple shapes that are uniformly distributed circumferentially on the seal face of at least one ring of the rotating ring or stationary ring and be similar to
The hydrodynamic type groove of flower petal appearance.
Summary of the invention
The object of the present invention is to for overcome the deficiencies in the prior art, provide a kind of mechanical seal for imitating petal type groove
Structure.
Realize that technical scheme is as follows, a kind of mechanical seal structure for imitating petal type groove of the present invention, including it is interior
Ring, outer ring and sealing surface offer a certain number of petal type grooves on the sealing surface；Each petal type groove is along the machinery
The circumferencial direction equal distribution of sealing surface；The sealing surface includes sealing weir area and seals dam area；The sealing weir area is two flowers
Non-slotted area part between lobed type groove；The seals dam area is set smooth between the end and inner ring of petal type groove
Annular plane part；The sealing weir area and seals dam area are all located on the front end face i.e. sealing surface of the mechanical seal structure
Different location.
The petal type groove is made of diversion channel and conduction hole；The diversion channel is ellipse, centered on conduction hole
Radially outward width is penetrated, and the diversion channel is 3~8 in sealing surface circumferencial direction equal distribution, the number of diversion channel；All shuntings
Slot depth all having the same.
The conduction hole is perpendicular to sealing surface；The conduction hole is circular through hole, and diameter is 1~2mm.
The petal type groove shares 6~10, and the number of number changes with the size of the mechanical seal structure.
The diversion channel is ellipse, and semi-minor axis is 0.5~2.5mm, major semiaxis is 5~10mm.
The outer ring is the periphery of the mechanical seal structure sealing surface；Inner ring is the mechanical seal structure sealing surface
Inner headed face.
The present invention imitates in the mechanical seal structure of petal type groove, since conduction hole introduces the lubricating fluid in seal chamber
Into petal type groove, entire type groove has certain hydrostatic pressure effect, so that mechanical seal changes under action of hydrostatic pressure
It has been apt to open, stop the lubricating status of stage end face, has avoided the fretting wear of end face, extend service life；It is circumferential symmetrical
Type groove hydrodynamic effect is generated because of cavitation effect and pumping effect, generating big opening force rapidly ensures that end face is opened in time
And micron order fluid film is maintained between end face, be conducive to the quick unlatching of end face under extreme conditions, at the same time diversion channel
Enrichment effect be superimposed above-mentioned high current body dynamic pressure effect, make sealing have excellent stability.
The beneficial effects of the present invention are the type groove that the present invention imitates the mechanical seal structure of petal type groove has certain
Hydrostatic pressure effect, circumferential symmetrical type groove generate hydrodynamic effect；Sealing stream can be effectively prevented in petal type groove
The accumulation of particle in body, the presence in seals dam area may be implemented axis it is static when static seal.The present invention can effectively avoid small film thickness,
Touching under the extreme operating condition of small pressure difference is rubbed failure, realize sealing it is non-contact, improve wear-resistant, extend service life, mention
The high reliability of sealing.The present invention imitates the circumferentially symmetrical type groove arrangement of petal type groove, is not only suitable for single direction rotation
Machinery is also applied for bidirectional rotation machinery.
The present invention is suitable for the shaft end seal of the rotating machinery shafts such as various compressors, expanding machine, pump, reaction kettle, blender
Device.
Detailed description of the invention
Fig. 1 is existing machinery sealed structural schematic diagram；
Fig. 2 is the main view that the present invention imitates petal type groove mechanical seal structure；
Fig. 3 is the shaft side figure that the present invention imitates petal type groove mechanical seal structure；
Fig. 4 is the partial enlarged view for imitating petal type groove；
Fig. 5 is the geometric dimension figure for imitating petal type groove；
Fig. 6 is the A-A cut away view in Fig. 2；
Fig. 7 is the direction of rotation schematic diagram of mechanical seal structure of the present invention；
Fig. 8 is another structural schematic diagram of the embodiment of the present invention；
In figure, 1 is outer ring；2 be inner ring；3 be sealing weir area；4 be seals dam area；5 be petal type groove；51 be to shunt
Slot；52 be conduction hole；φ 1 is the internal diameter of entire mechanical seal structure；φ 2 is the outer diameter of entire mechanical seal structure；L is machinery
Sealing structure axial width；B1 is the elliptical semi-minor axis of diversion channel, and B2 is elliptical major semiaxis, and C is the diameter of conduction hole；H is
The depth of diversion channel, each shunting groove depth are identical.
High-pressure side (seal chamber), low-pressure side (sealing leak side), direction of rotation (rotation direction of rotary shaft).
Specific embodiment
Embodiment 1
A specific embodiment of the invention such as Fig. 2-Fig. 7.
As shown in Fig. 2, a kind of mechanical seal structure for imitating petal type groove of the present embodiment, including inner ring 2, outer ring 1 and close
Cover offers a certain number of petal type grooves on the sealing surface；Circle of each petal type groove along the mechanical sealing surface
Circumferential direction equal distribution；The sealing surface includes sealing weir area 3 and seals dam area 4；The sealing weir area 3 is two petal type grooves
Between non-slotted area part；4th area of seals dam is smooth torus shape set between the end and inner ring of petal type groove
Planar section；The sealing weir area and seals dam area are all located at the difference on the front end face i.e. sealing surface of the mechanical seal structure
Position.
As shown in figure 3, φ 1 is the internal diameter of the entire mechanical seal structure of the present embodiment；φ 2 is that the present embodiment is entire mechanical close
The outer diameter of seal structure；L is the present embodiment mechanical seal structure axial width.
As shown in figure 4, petal type groove is made of diversion channel 51 and conduction hole 52 in the present embodiment；The diversion channel 51 is
Ellipse, radially outward width is penetrated centered on conduction hole 52, and the diversion channel 51 is shunted in sealing surface circumferencial direction equal distribution
The number of slot is 3~8, and the present embodiment is that 6 circumferential directions are uniformly distributed diversion channel, six diversion channels 51, and semi-minor axis B1 is
1mm, major semiaxis B2 are 8mm.
As shown in fig. 6, all diversion channels depth H all having the same；Conduction hole 52 is that circular through hole Circularhole diameter is
1mm；Conduction hole includes the axial conduction hole and the diameter vertical with axial conduction hole perpendicular to mechanical seal structure sealing surface center
To conduction hole, radial conduction hole leads directly to outer ring；Axial conduction hole is connected to form lubricant channel with radial conduction hole.
As shown in fig. 7, being the direction of rotation schematic diagram of mechanical seal structure of the present invention, the present embodiment mechanical seal structure was both
Bidirectional rotation machinery is also applied for suitable for single direction rotation machinery；High-pressure side therein be seal chamber where region, low-pressure side
For the region where sealing leak side.
Embodiment 2
The present embodiment is as shown in Figure 8.The present embodiment is on the basis of the above embodiments, by one of each diversion channel 51
The end for shunting petal is connected by a ring groove, so that the raising of static pressure opening force is more significant, is suitable for
The occasion of higher duty parameter.
A kind of conduction hole opening of mechanical seal structure for imitating petal type groove of the present invention is namely sealed towards high-pressure side
Chamber, so that high pressure side liquid can enter seal face under the action of hydrostatic pressure, will be dynamic and static before shaft rotation
Ring separates, to avoid the abrasion of end face seal Ba Qu when rotation.When mechanical seal structure starts rotation, due to depositing for diversion channel
, apparent hydrodynamic effect is formed, and due to the presence of multiple type grooves, constantly accumulate along direction of rotation Fluid pressure,
Generate enrichment effect；Sealing startup stage can be such that end face faster separates；In shutdown phase it is possible to prevente effectively from end face it is excessive
Rub and cause the failure of sealing；Simultaneously in the presence of dynamic disturbances, the increase of small film thickness lower end surface film bearing capacity can be effective
Ground avoids abrasion caused by the contact of end face, improves the anti-interference ability of sealing.
Claims (2)
1. a kind of mechanical seal structure for imitating petal type groove, including inner ring, outer ring and sealing surface, which is characterized in that described close
A certain number of petal type grooves are offered on cover；Circumferencial direction equal distribution of each petal type groove along the sealing surface；
The sealing surface includes sealing weir area and seals dam area；Non-slotted area portion of the sealing weir area between two petal type grooves
Point；The seals dam area is smooth torus shape planar section set between the end and inner ring of petal type groove；
The petal type groove is made of diversion channel and conduction hole；The diversion channel is ellipse, radial centered on conduction hole
To external radiation, the diversion channel is 3~8 in sealing surface circumferencial direction equal distribution, the number of diversion channel；All diversion channels are all
Depth having the same；
The conduction hole includes perpendicular to the axial conduction hole at mechanical seal structure sealing surface center and vertical with axial conduction hole
Radial conduction hole, radial conduction hole leads directly to outer ring；Axial conduction hole is connected to form lubricant channel with radial conduction hole.
2. a kind of mechanical seal structure for imitating petal type groove according to claim 1, which is characterized in that the conduction hole
Perpendicular to sealing surface；The conduction hole is circular through hole, and diameter is 1~2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711037952.0A CN107542934B (en) | 2017-10-31 | 2017-10-31 | A kind of mechanical seal structure for imitating petal type groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711037952.0A CN107542934B (en) | 2017-10-31 | 2017-10-31 | A kind of mechanical seal structure for imitating petal type groove |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107542934A CN107542934A (en) | 2018-01-05 |
| CN107542934B true CN107542934B (en) | 2019-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711037952.0A Expired - Fee Related CN107542934B (en) | 2017-10-31 | 2017-10-31 | A kind of mechanical seal structure for imitating petal type groove |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1167890C (en) * | 2001-01-18 | 2004-09-22 | 王玉明 | Spiral groove end sealer capable of being rotated in both directions |
| CN103470770A (en) * | 2013-09-06 | 2013-12-25 | 浙江工业大学 | Micro-hole end face mechanical seal structure with air inlet grooves |
| CN104165228B (en) * | 2014-07-25 | 2016-04-13 | 浙江工业大学 | A kind of like sensitive plant nibs bunch end surface mechanical sealing structure |
| JP2016161099A (en) * | 2015-03-04 | 2016-09-05 | 三菱化学株式会社 | Transfer method for liquid containing easy-polymerizable compound |
| CN205244387U (en) * | 2015-12-10 | 2016-05-18 | 中国石油大学(华东) | Two -way rotatory petal -shaped terminal surface mechanical seal structure |
| CN105465371A (en) * | 2015-12-30 | 2016-04-06 | 南京林业大学 | Bidirectional-rotation self-pumping fluid dynamic pressure type mechanical seal |
| CN106015571B (en) * | 2016-06-20 | 2017-12-01 | 昆明理工大学 | A kind of mechanical seal ring with imitative maple leaf shape groove |
| CN106352093B (en) * | 2016-11-29 | 2018-06-12 | 淮海工学院 | A kind of bidirectional rotation auxiliary start stop mode can the tree-like slot end face seal structure of resorption type |
| CN107218396B (en) * | 2017-06-07 | 2019-01-15 | 北京航空航天大学 | A kind of end face has the mechanical seal structure of vein shape shape slot |
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2017
- 2017-10-31 CN CN201711037952.0A patent/CN107542934B/en not_active Expired - Fee Related
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| CN107542934A (en) | 2018-01-05 |
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