CN102588601A - Mechanical sealing structure with flower and plant simulating fluid type groove end surfaces - Google Patents
Mechanical sealing structure with flower and plant simulating fluid type groove end surfaces Download PDFInfo
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- CN102588601A CN102588601A CN2012100341168A CN201210034116A CN102588601A CN 102588601 A CN102588601 A CN 102588601A CN 2012100341168 A CN2012100341168 A CN 2012100341168A CN 201210034116 A CN201210034116 A CN 201210034116A CN 102588601 A CN102588601 A CN 102588601A
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- type groove
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Abstract
The invention discloses a mechanical sealing structure with flower and plant simulating fluid type groove end surfaces. The mechanical sealing structure comprises a mechanical sealing movable ring and a mechanical sealing stationary ring; one sides of the end surfaces of the movable ring and the stationary ring are high-pressure sides, i.e. advanced positions; the other sides of the end surfaces of the movable ring and the stationary ring are low-pressure sides, i.e. backward positions; the backward positions of the end surfaces are provided with circular sealing dams with smooth flat surfaces; the mechanical sealing structure is characterized in that a plurality of fluid type grooves, which are uniformly distributed along the circumference direction, are formed by drainage grooves, left profiled grooves and right profiled grooves centering around the drainage grooves and take the shape of flowers and plants in appearance, are arranged on at least one of the end surfaces of the movable ring and the stationary ring, the drainage grooves are radial grooves; the fluid type grooves are distributed on an annular belt in accordance with the centers of the end surfaces, the circular belt is arranged at the advanced positions of the end surfaces; and no slotting regions between the flower and plant simulating fluid type grooves form a sealing weir. The mechanical sealing structure has better fluid guiding effect; the pressures of the root regions of the fluid type grooves are higher and more uniformly distributed; and the bearing capacity of a seal and the rigidity of a fluid membrane are increased.
Description
Technical field
The present invention relates to a kind of contactless end face seal structure of rotary type fluid machine; Be particularly related to a kind of contactless face seals of imitative flowers and plants fluid type groove end surface mechanical sealing structure that can two-way rotation, be applicable to various compressors, pump and still shaft end seal device with rotating machinery rotating shafts such as stirrers.
Background technique
Shaft end seal (like mechanical seal, packing seal, labyrinth sealing etc.) is indispensable basic components in the rotating machineries such as various fluid machineries, dynamic power machine.At present non-contact mechanical seal has become the first-selected shaft end seal of high parameter rotary type fluid machine with outstanding feature such as its non-contact, no wearing and tearing, low energy consumption, anti-high pressure and high stability and advanced feature.The existing report of end face seal that can two-way rotation; Like Chinese patent 98103575.2 " bidirectional rotation double-row double-blade spiral groove face sealing ", 01102213.2 " spiral groove end sealer capable of being rotated in both directions ", 200610049841.7 " wear-resistant mechanical sealing structure on end face ", 200720106746.6 " variable distribution porous end face mechanical sealing structures " and 200910154418.7 " a kind of liquid lubricated end face seal structure " with cross-scale surface texture characteristic; U.S. Pat 5090712 " Non-contacting; gap-type seal having a ring with a patterned microdam seal face ", US6446976 " Hydrodynamic face seal with grooved sealing dam for zero-leakage ", US7194803 " Seal ring and method of forming micro-topography ring surfaces ", US7775528 " Bi-directional pattern for dynamic seals " and US20020093141 " Bi-direction rotatable face seal with spiral grooves " etc.; Except that patent 200610049841.7 and US7194803; Other China and foreign countries' patents all are on mechanical seal end surface, to open micron-sized Hydrodynamic pressure type groove (like T type groove, " king " word groove, double spiral groove etc.) or type hole; Therefore; The geometry pattern of dynamic pressure groove is the core technology of foregoing invention with relevant geometrical structure parameter; Be to guarantee that mechanical seal can forward and reversely rotate, realize the complete non-contact between the end face and obtain one of key technology of premium properties simultaneously.Although these fluid type groove end face seals have low friction power loss (like T type groove, " king " word groove and micropore) and advantages of excellent stability (" king " word groove and double spiral groove); But startability or low speed low pressure seal performance are undesirable, and the bearing capacity of fluid film and rigidity also receive to a certain degree restriction.
Summary of the invention
For the startability that overcomes the sealing that exists in the existing two-way rotary-type groove end surface mechanical sealing structure or the low speed low-pressure performance is undesirable, the bearing capacity of fluid film and the restricted problem of rigidity, the present invention provides a kind of imitative flowers and plants fluid type groove end surface mechanical sealing structure.
The technological scheme that the present invention adopts is:
A kind of imitative flowers and plants fluid type groove end surface mechanical sealing structure; The rotating ring and the stationary ring that comprise mechanical seal; One side of the end face of said rotating ring and stationary ring is that the high pressure side is the upper reaches; The opposite side of the end face of said rotating ring and stationary ring is that low voltage side is downstream, and the downstream of said end face are provided with the ring packing dam of smooth flat, it is characterized in that: it is the fluid type groove of the similar flowers and plants shape of profile formed of the left and right type groove at center by drainage trough with the drainage trough that at least one end face of said rotating ring or stationary ring is provided with a plurality of edges circumferentially equally distributed; Said drainage trough is a radial groove; Said fluid type groove is distributed on the endless belt according to the end face center, and said endless belt is located at the upper reaches of end face, and the non-slot area between the said imitative flowers and plants fluid type groove constitutes the sealing weir.
Further, said fluid type groove is on seal face and periodically arranges.
Further, the width of said endless belt is made as w
h, 0≤w wherein
h＜B, B are seal f ace width.
Further, said left and right type groove is that the center is symmetric arrangement with the drainage trough, and said left and right type groove is drawn close at the upper reaches and described drainage trough, separates with described drainage trough in downstream.
Further, the radial dimension of said drainage trough is all less than the radial dimension of left and right type groove.
Further, said left and right type groove outer side wall molded lines is smooth molded lines or sawtooth molded lines.
Further, the downstream of said left and right type groove is connected with the concentric type groove of end face, the width w of the type groove that said and end face are concentric
aWith degree of depth h
aAll correspondent equals, and w
a=0.5～2.0mm, h
a=h
g/ 10～h
g/ 5, h
gIt is the degree of depth of imitative flowers and plants fluid type groove.
Or the downstream of the left and right type groove of said imitative flowers and plants fluid type groove is connected with a type hole separately, the diameter in said type hole or length of side d
dWith degree of depth h
dEqual correspondent equal, span is respectively: d
d=0.5～3.5mm, h
d=h
g/ 10～h
g/ 5, h
gIt is the degree of depth of imitative flowers and plants fluid type groove.
Further, when the end face seal of said imitative flowers and plants fluid type groove is used for the seal fluid medium, said imitative flowers and plants fluid type groove depth h
gSpan be: h
g=0.25～3.5mm, optimum valuing range is: h
g=0.5～1.8mm, said drainage trough radial length l
pSpan be: l
p=l
g/ 6～l
g/ 2, l
gIt is the radial length value of left and right type groove; When being used for the sealing gas medium, said imitative flowers and plants fluid type groove depth h
gSpan be: h
g=3～20 μ m, radial length l
p=l
g/ 3～l
g
Further, the groove depth of said imitative flowers and plants fluid type groove is the Changing Pattern that the upper reaches are dark, downstream are shallow, and the deep trouth of said imitative flowers and plants fluid type groove partly is 1.1～3.0 times of shallow slot partial depth.
The shape of drainage trough according to the invention can be shapes such as spindle, rectangle, triangle, W shape, ellipse; The sidewall molded lines of said left and right type groove can be smooth molded lines such as helix, circular arc line, straight line.
Beneficial effect of the present invention is embodied in:
1. the present invention adopts particularly flowers and plants profiles such as imitative typical orchid, narcissus and aloe of imitative flowers and plants; The imitative flowers and plants fluid type groove that constitutes has better fluid flow guiding effect; The pressure of fluid type groove root area is higher, be more evenly distributed; Therefore improve the bearing capacity of sealing and the rigidity of fluid film, strengthened the stability of sealing;
2. the downstream of imitative flowers and plants fluid type groove connects with arc groove or annular groove among the present invention; Or be provided with millimeter level type hole, and the pressure distribution uniformity coefficient of imitative flowers and plants fluid type groove root area and neighboring area thereof when having improved the sealing operation, the hydrodynamic effect of generation is strong; The end face high lubricating effect; Further improve fluid film rigidity, strengthened the stability of sealing, also improved the startability of sealing simultaneously;
3. the groove depth of fluid type groove is the Changing Pattern that the upper reaches are dark, downstream are shallow among the present invention; When fluid pump draws the effect enhancing; Deep trouth can produce the hydrodynamic effect under sealing normal operation condition, and the fluid that shallow slot stores can prevent under the low speed low pressure condition or end face generation dry grinding in the pump start-up course, has further improved the lubrication effect of end face; The issuable wearing and tearing of end face have been reduced; Further improved the dynamic pressure opening feature of sealing, improved the overall performance and the abrasion resistance properties of sealing, be specially adapted to can two-way rotation the noncontact seal device;
4. irrotationality was to requiring when seal arrangement that sealing configuration of the present invention is processed was installed, can unidirectional or two-way rotation, can effectively control leak-down rate, seal safe and reliable to operation, long service life.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention one.
Fig. 2 is the fluid type groove partial structurtes signal enlarged view of the embodiment of the invention one.
Fig. 3 is the structural representation of the embodiment of the invention two.
Fig. 4 a is the change groove depth fluid type groove structural representation of the embodiment of the invention three.
Fig. 4 b is the change groove depth fluid type groove partial structurtes enlarged view of the embodiment of the invention three.
Fig. 4 c is the change groove depth fluid type grooved profile figure of the embodiment of the invention three.
Fig. 5 is the zigzag fashion fluid type groove structural representation of the embodiment of the invention four.
Fig. 6 is the drainage trough of the embodiment of the invention five and the split-body fluid type groove structure schematic representation that left and right type groove breaks away from.
Embodiment
In conjunction with accompanying drawing enforcement of the present invention is further detailed:
Embodiment one
With reference to Fig. 1-2; A kind of imitative flowers and plants fluid type groove end surface mechanical sealing structure comprises the rotating ring and the stationary ring of mechanical seal, and a side of the end face of said rotating ring and stationary ring is that the high pressure side is the upper reaches; The opposite side of the end face of said rotating ring and stationary ring is that low voltage side is downstream; The downstream of said end face are provided with the ring packing dam 3 of smooth flat, characteristics be at least one end face of said rotating ring or stationary ring to be provided with a plurality of edges circumferentially equally distributed be the fluid type groove 2 of the similar flowers and plants shape of profile formed of the left and right type groove 21,23 at center by drainage trough 22 with drainage trough 22, said drainage trough 22 is a radial groove; Said fluid type groove 2 is distributed on the endless belt according to end face 1 center; Said endless belt is located at the upper reaches of end face 1, and the non-slot area between the said imitative flowers and plants fluid type groove 1 constitutes sealing weir 4, plays current limliting and static seal effect.
Further, said fluid type groove 2 is on seal face and periodically arranges.
Further, the width of said endless belt is made as w
h, 0≤w wherein
h＜B, B are seal f ace width.
Further, said left and right type groove 21,23 is that the center is symmetric arrangement with drainage trough 22, and said left and right type groove 21,23 is drawn close at the upper reaches and described drainage trough 22, opens in 22 minutes in downstream and described drainage trough, plays the effect of two-way pumping sealing medium.
Further, the radial dimension of said drainage trough 22 is all less than the radial dimension of left and right type groove 21,23.
Further, said left and right type groove 21,23 outer side wall molded lines are smooth molded lines.
Further, when the end face seal of said imitative flowers and plants fluid type groove is used for the seal fluid medium, said imitative flowers and plants fluid type groove 2 degree of depth h
gSpan be: h
g=0.25～3.5mm, optimum valuing range is: h
g=0.5～1.8mm, said drainage trough 22 radial length l
pSpan be: l
p=l
g/ 6～l
g/ 2, l
gIt is the radial length value of left and right type groove 21,23; When being used for the sealing gas medium, said imitative flowers and plants fluid type groove 2 degree of depth h
gSpan be: h
g=3～20 μ m, radial length l
p=l
g/ 3～l
g
The shape of drainage trough described in the present invention 22 can be shapes such as spindle, rectangle, triangle, W shape, ellipse; The sidewall molded lines of said left and right type groove 21,23 can be smooth molded lines such as helix, circular arc line, straight line.
To the operational condition of different rotary formula fluid machinery, through optimizing the geometrical structure parameter of imitative flowers and plants fluid type groove, can satisfy under the different occasions the usage requirement of sealability, be specially adapted to can two-way rotation contactless face seals.
Embodiment two
With reference to Fig. 3; Present embodiment is that with embodiment one difference the downstream of said imitative flowers and plants fluid type groove is connected with its alloytype groove 5 or type hole 6; To improve groove root place end face circumferentially and the pressure distribution uniformity of near zone, the enhance fluid dynamic pressure effect improves fluid film rigidity; Improve the starting characteristic and the low speed low pressure operation ability of sealing, improve the antiwear property of end face.
Said type groove 5 can be molded lines grooves such as annular groove 51, arc groove 52, and the width and the degree of depth of said type groove 5 are respectively w
aAnd h
a, span is: w
a=0.5～2.0mm, h
a=h
g/ 10～h
g/ 5, h wherein
gIt is the degree of depth of imitative flowers and plants fluid type groove; Said type hole 6 is millimeter level regular sections holes, and its sectional shape can be rectangle, square, trapezoidal, V-arrangement, U-shaped, semicircle, ellipse etc., and the diameter in said type hole 6 or the length of side and the degree of depth are respectively d
dAnd h
d, span is: d
d=0.5～3.5mm, h
d=h
g/ 10～h
g/ 5.All the other structures are identical with embodiment one with mode of execution.
Embodiment three
With reference to Fig. 4 a-4c, present embodiment and embodiment's one difference is that said fluid type groove is rendered as the convergence type ledge structure that the upper reaches are dark, downstream are shallow.Said convergence type fluid type groove can be a step, two steps or a plurality of step; But be the control processing cost; Satisfying under the prerequisite of certain cost performance; Generally with two or three steps for well, the minimum-depth in said convergence type fluid type groove downstream should be not less than 1.5 μ m (dry gas seals) or 0.1mm (liquid sealing); In addition, require higher occasion in sealing stability and end face lubricity, also can adopt convergence type sloping platform stage structure, the inclination angle on said sloping platform rank is 2～10 degree.The imitative flowers and plants fluid type groove end surface mechanical sealing that adopts convergence type ledge structure is lower or start-up course is long or the operation operating mode is easy to the demand of applications such as undergoing mutation in order to satisfy rotating speed; Draw effect to strengthen face type groove pump; Improve fluid film rigidity; The phenomenon of avoiding dry grinding takes place, and the safety reliability when guaranteeing machine run also plays purpose of energy saving simultaneously.All the other structures are identical with embodiment one with mode of execution.
Embodiment four
With reference to Fig. 5, present embodiment and embodiment's one difference is that the sidewall molded lines of the left and right type groove 21,23 of said fluid type groove is the flexuose molded lines, is the fluid type groove of imitating careless section plant form structure such as aloe.The sawtooth sidewall of said left and right type groove 21,23 can be that outer side wall is a flexuose; Also can be that madial wall is a flexuose; Also can be that inside and outside sidewall is flexuose, the basic molded lines of toothed edge be typical smooth molded lines equally, comprises basic molded lines such as helix, circular arc line, straight line.General this fluid type groove can be in conjunction with embodiment three actual uses, the corresponding number of steps of the number of teeth.Main application is also identical with embodiment three.All the other structures are identical with embodiment one with mode of execution.
Embodiment five
Referring to Fig. 6, present embodiment and embodiment's one difference is that the drainage trough 22 of said fluid type groove is separated with left and right type groove 21,23.All the other structures are identical with embodiment one with mode of execution.
The described content of this specification embodiment only is enumerating the way of realization of inventive concept; Protection scope of the present invention should not be regarded as and only limit to the concrete form that embodiment states, protection scope of the present invention also comprise those skilled in the art conceive according to the present invention the equivalent technologies means that can expect.
Claims (10)
1. imitative flowers and plants fluid type groove end surface mechanical sealing structure; The rotating ring and the stationary ring that comprise mechanical seal; One side of the end face of said rotating ring and stationary ring is that the high pressure side is the upper reaches; The opposite side of the end face of said rotating ring and stationary ring is that low voltage side is downstream, and the downstream of said end face are provided with the ring packing dam of smooth flat, it is characterized in that: it is the fluid type groove of the similar flowers and plants shape of profile formed of the left and right type groove at center by drainage trough with the drainage trough that at least one end face of said rotating ring or stationary ring is provided with a plurality of edges circumferentially equally distributed; Said drainage trough is a radial groove; Said fluid type groove is distributed on the endless belt according to the end face center, and said endless belt is located at the upper reaches of end face, and the non-slot area between the said imitative flowers and plants fluid type groove constitutes the sealing weir.
2. imitative flowers and plants fluid type groove end surface mechanical sealing structure as claimed in claim 1 is characterized in that: said fluid type groove is on seal face periodically arranges.
3. imitative flowers and plants fluid type groove end surface mechanical sealing structure as claimed in claim 2, it is characterized in that: the width of said endless belt is made as w
h, 0≤w wherein
h＜B, B are seal f ace width.
4. imitative flowers and plants fluid type groove end surface mechanical sealing structure as claimed in claim 3; It is characterized in that: said left and right type groove is that the center is symmetric arrangement with the drainage trough; Said left and right type groove is drawn close at the upper reaches and described drainage trough, separates with described drainage trough in downstream.
5. imitative flowers and plants fluid type groove end surface mechanical sealing structure as claimed in claim 4 is characterized in that: the radial dimension of said drainage trough is all less than the radial dimension of left and right type groove.
6. imitative flowers and plants fluid type groove end surface mechanical sealing structure as claimed in claim 5 is characterized in that: said left and right type groove outer side wall molded lines is smooth molded lines or sawtooth molded lines.
7. imitative flowers and plants fluid type groove end surface mechanical sealing structure as claimed in claim 6 is characterized in that: the downstream of said left and right type groove is connected with the concentric type groove of end face, the width w of the type groove that said and end face are concentric
aWith degree of depth h
aAll correspondent equals, and w
a=0.5～2.0mm, h
a=h
g/ 10～h
g/ 5, h
gIt is the degree of depth of imitative flowers and plants fluid type groove.
8. imitative flowers and plants fluid type groove end surface mechanical sealing structure as claimed in claim 6, it is characterized in that: the downstream of the left and right type groove of said imitative flowers and plants fluid type groove is connected with a type hole separately, the diameter in said type hole or length of side d
dWith degree of depth h
dEqual correspondent equal, span is respectively: d
d=0.5～3.5mm, h
d=h
g/ 10～h
g/ 5, h
gIt is the degree of depth of imitative flowers and plants fluid type groove.
9. like the described imitative flowers and plants fluid type groove end surface mechanical sealing structure of one of claim 6-8, it is characterized in that: when the end face seal of said imitative flowers and plants fluid type groove is used for the seal fluid medium, said imitative flowers and plants fluid type groove depth h
gSpan be: h
g=0.25～3.5mm, said drainage trough radial length l
pSpan be: l
p=l
g/ 6～l
g/ 2, l
gIt is the radial length value of left and right type groove; When being used for the sealing gas medium, said imitative flowers and plants fluid type groove depth h
gSpan be: h
g=3～20 μ m, radial length l
p=l
g/ 3～l
g
10. imitative flowers and plants fluid type groove end surface mechanical sealing structure as claimed in claim 9; It is characterized in that: the groove depth of said imitative flowers and plants fluid type groove is the Changing Pattern that the upper reaches are dark, downstream are shallow, and the deep trouth of said imitative flowers and plants fluid type groove partly is 1.1～3.0 times of shallow slot partial depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210034116.8A CN102588601B (en) | 2012-02-15 | 2012-02-15 | Mechanical sealing structure with flower and plant simulating fluid type groove end surfaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210034116.8A CN102588601B (en) | 2012-02-15 | 2012-02-15 | Mechanical sealing structure with flower and plant simulating fluid type groove end surfaces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102588601A true CN102588601A (en) | 2012-07-18 |
| CN102588601B CN102588601B (en) | 2015-04-22 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210034116.8A Active CN102588601B (en) | 2012-02-15 | 2012-02-15 | Mechanical sealing structure with flower and plant simulating fluid type groove end surfaces |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104165228A (en) * | 2014-07-25 | 2014-11-26 | 浙江工业大学 | Hole cluster end face mechanical sealing structure like sensitive plant type |
| CN104728451A (en) * | 2015-04-09 | 2015-06-24 | 江西省科学院应用物理研究所 | Directivity large hole and three-dimensional groove combined non-contact type mechanical sealing structure |
| CN107366748A (en) * | 2017-07-24 | 2017-11-21 | 浙江工业大学 | A kind of VW mechanical seal end surfaces structure |
| CN108999980A (en) * | 2017-06-06 | 2018-12-14 | 祥景精机股份有限公司 | Shaft seal device |
| WO2024024839A1 (en) * | 2022-07-29 | 2024-02-01 | イーグル工業株式会社 | Sliding component |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107366748A (en) * | 2017-07-24 | 2017-11-21 | 浙江工业大学 | A kind of VW mechanical seal end surfaces structure |
| WO2024024839A1 (en) * | 2022-07-29 | 2024-02-01 | イーグル工業株式会社 | Sliding component |
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