CN103122998A - Sharkskin imitation streamline groove end face mechanical sealing structure - Google Patents
Sharkskin imitation streamline groove end face mechanical sealing structure Download PDFInfo
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- CN103122998A CN103122998A CN2013100597018A CN201310059701A CN103122998A CN 103122998 A CN103122998 A CN 103122998A CN 2013100597018 A CN2013100597018 A CN 2013100597018A CN 201310059701 A CN201310059701 A CN 201310059701A CN 103122998 A CN103122998 A CN 103122998A
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Abstract
Disclosed is a streamline groove end face mechanical sealing structure imitating a creased appearance of the surface of sharkskin. The streamline groove end face mechanical sealing structure comprises two mechanical sealing rings, namely a moving ring and a static ring, plural groups of streamline grooves imitating the creased appearance of the surface of the sharkskin and arranged along the peripheral direction are arranged at least one end face of the sealing rings of the moving ring and the static ring. Each biomimetic groove comprises a left circular groove and a right circular groove, a convex platform along the pressure drop direction in the groove and transitional parts between two sides of the convex platform and an outer contour line of the groove, so that the streamline grooves, namely sharkskin imitation streamline grooves, with the appearance imitating the creased surface of the sharkskin are formed. The sharkskin imitation streamline grooves are arranged on a high pressure side of an end face medium, namely an upper stream. The whole outlines of the sharkskin imitation streamline grooves are in a contracting shape along the pressure drop direction. The sharkskin imitation streamline grooves are arranged to form a groove annular belt along the circumference of the end face, and a plane annular belt area without grooves on the outer end face other than the groove annular belt is a sealing dam.
Description
Technical field:
The invention belongs to the contactless face seals of rotating machinery, be applicable to various compressors, pump and still with the shaft end seal device of the rotating machinery rotating shafts such as stirrer, but be particularly related to the contactless face seals of bidirectional rotation, and applicable working condition extensively is particularly useful for belonging to the mechanical end face seal technical field under the high pressure operating mode.
Background technique:
Shaft end seal (as 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 with its non-contact, become the first-selected shaft end seal of high parameter rotary type fluid machine without the outstanding features such as wearing and tearing, low energy consumption, anti-high pressure and high stability and advanced feature.but the existing report of the end face seal of bidirectional rotation, as 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 structure " and 200910154418.7 " a kind of liquid lubricated end face seal structure with cross-scale surface texture characteristic ", US Patent No. 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., the geometry pattern of dynamic pressure groove and relevant geometrical structure parameter are the core technologies of foregoing invention, to guarantee that mechanical seal can be just, counterrotating, realize the Entirely contactless between end face and obtain simultaneously one of key technology of excellent sealing performance.Although these fluid type groove end face seals have low friction power loss and good stability, undesirable its using scope that limited of startability or dynamic pressure effect and air film supported power.
Summary of the invention:
Deficiency for fear of above-mentioned bidirectional rotary groove end surface mechanical sealing transition, particularly the startability of sealing or dynamic pressure effect and air film supported power is undesirable, the invention provides a kind of streamlined groove end surface mechanical sealing structure of imitative shark skin surface gauffer profile.
Technological scheme of the present invention:
a kind of streamlined groove end surface mechanical sealing structure of imitative shark skin surface gauffer profile, comprise two mechanical seal rings, it is rotating ring, stationary ring, in described rotating ring or stationary ring, the end face of at least one seal ring is provided with many groups along the streamlined groove of the imitative shark skin surface gauffer profile that circumferentially distributes, this biomimetic type groove comprises left arc groove 21, right arc groove 22, in type groove 2 along transition portion 241 and 242 compositions between the outer contour of the boss 23 of following current trend and boss 23 and type groove 2, consist of the streamlined groove 2 of the similar shark skin surface gauffer of profile, namely imitate the streamlined groove of sharkskin.The streamlined groove of described imitative sharkskin is arranged at end face medium high pressure side, i.e. upstream; The overall profile of the streamlined groove of described imitative sharkskin is collapsed shape along the Pressure Drop direction; The streamlined groove of described imitative sharkskin is according to end face circumferential arrangement forming tank endless belt, except the planar rings region of unslotted on type grooved ring band exterior edge face is the sealing dam.
Further, the streamlined groove end surface mechanical sealing structure of described a kind of imitative sharkskin when being used for the seal fluid medium, its fluid type groove depth h
gSpan be h
g=0.25～3.5mm, the preferred value scope is h
g=0.5～2.2mm and be specially adapted to the high pressure occasion; When being used for the sealing gas medium, its fluid type groove depth h
gSpan be h
g=1～20 μ m, the preferred value scope is h
g=3.5～9.5 μ m.
Further, all be circumferential smooth waviness transition between the boss of the streamlined groove of described imitative sharkskin and its transition portion, the transition waviness curve is sine wave, cosine wave, skew lines ripple, exponential wave.
Boss and the transition portion thereof of the streamlined groove of described imitative sharkskin are contour plane.
Further, the left and right arc groove of the streamlined groove of described imitative sharkskin is arranged symmetrically centered by rib ridged boss center line.
Further, the circumferential size of the left circular arc type groove of the streamlined groove of described imitative sharkskin and right circular arc type groove or radial dimension or axial depth size equate respectively or do not wait.
Further, the external frame molded line global shape of the streamlined groove of described imitative sharkskin can be triangle, fan-shaped, circular arc, crescent shape.
Further, the external frame sidewall molded line of the streamlined groove of described imitative sharkskin can be helix, circular arc line, straight line, jaggies.
Further, the shape of the left arc groove of the streamlined groove of described imitative sharkskin or right arc groove can be semicircle, rectangle, ellipse.
Further, the downstream of the streamlined groove of described imitative sharkskin and type groove or type hole are connected, and the geometrical construction size in described downstream type groove or type hole is correspondent equal or do not wait respectively; Described downstream type groove is arc groove or annular groove, and described downstream type hole sectional shape is rectangle, square, trapezoidal, V-arrangement, U-shaped, semicircle, ellipse.
Compared with the prior art, advantage of the present invention and beneficial effect are:
1. the present invention imitates shark skin surface gauffer profile, and the streamlined groove of imitative sharkskin of formation has larger dynamic pressure effect and increases the resistance antihypertensive effect.Rib ridged boss is maximum to the impedance of circumferential flow, and when making the sealing operation, to increase the resistance effect more obvious in step-down, is easy to form waviness, the sealing of especially suitable high-pressure liquid medium in the High Pressure lower end surface; When the circumferential smooth waviness transition curve of itself and left and right sides transition portion makes the sealing operation, the pressure distribution of the imitative streamlined groove root area of sharkskin and neighboring area thereof is more even and can effectively prevent the accumulation of fluid-encapsulated middle particle; Coordinating between rib ridged boss and its transition portion makes the extrusion effect of its root area obvious, and pressure is higher; Boss is minimum to the impedance of radially flowing, and makes the lubricating end surface better effects if, has further improved fluid film rigidity, has strengthened the stability of sealing, has also improved the startability of sealing simultaneously;
in the present invention the groove depth of fluid type groove to be the upstream dark, the Changing Pattern that the downstream is shallow, 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 low speed low pressure condition or end face generation dry grinding in the pump start-up course, 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, improve overall performance and the abrasion resistance properties of sealing, but be specially adapted to the noncontact seal device of bidirectional rotation,
3. irrotationality was to requiring when the seal arrangement made of sealing configuration of the present invention was installed, can unidirectional or bidirectional 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 present invention one.
Fig. 2 is the three dimensional fluid type groove structure schematic diagram of the embodiment of the present invention one.
Fig. 3 is the fluid type groove partial structurtes signal enlarged view of the embodiment of the present invention one.
Fig. 4 is the structural representation of the embodiment of the present invention two.
Fig. 5 is the change groove depth fluid type groove structural representation of the embodiment of the present invention three.
Fig. 6 is the zigzag fashion fluid type groove structural representation of the embodiment of the present invention four.
Fig. 7 is that the asymmetrical wave of the embodiment of the present invention five is spent and crossed the curvilinear structures schematic diagram.
Embodiment
By reference to the accompanying drawings enforcement of the present invention is described in further detail:
Embodiment one
with reference to Fig. 1, Fig. 2 and Fig. 3, a kind of streamlined groove end surface mechanical sealing structure of imitative shark skin surface gauffer profile, it comprises rotating ring and the stationary ring of mechanical seal, in described rotating ring or stationary ring, the end face 1 of at least one seal ring is provided with many groups along the circumferential streamlined groove 2 of equally distributed imitative sharkskin, every group of fluid type groove is by left arc groove 21, right arc groove 22, in type groove 2 along the rib ridged boss 23 of following current trend and and the external frame molded line of type groove 2 between transition portion 241 and 242 form, consist of the streamlined groove of the similar shark skin surface gauffer of profile profile, referred to as the streamlined groove of imitative sharkskin.The streamlined groove of described imitative sharkskin is arranged at end face medium high pressure side, i.e. upstream; The overall profile of the streamlined groove of described imitative sharkskin is collapsed shape along the Pressure Drop direction; The streamlined groove of described imitative sharkskin is according to end face center arrangement forming tank endless belt; Non-slotted zones between the streamlined groove of described imitative sharkskin is sealing weir 3, the radial width of the streamlined grooved ring band of described imitative sharkskin is less than the end face width, except the planar rings zone of unslotted on type grooved ring band exterior edge face is sealing dam 4, play current limliting and static seal effect, be positioned at the end face low voltage side, i.e. the downstream.
Fluid type groove depth h when the streamlined groove of described imitative sharkskin is used for the seal fluid medium
gSpan be h
g=0.25～3.5mm, the preferred value scope is h
g=0.5～2.2mm and be specially adapted to the high pressure occasion; Fluid type groove depth h when being used for the sealing gas medium
gSpan be h
g=1～20 μ m, the preferred value scope is h
g=3.5～9.5 μ m.
All be circumferential smooth waviness transition between the rib ridged boss of the streamlined groove of described imitative sharkskin and its transition portion, the transition waviness curve is sine wave, cosine wave, oblique line ripple, exponential wave.
Rib ridged boss and the transition portion thereof of the streamlined groove of described imitative sharkskin are contour plane.
The left and right arc groove of the streamlined groove of described imitative sharkskin is arranged symmetrically centered by rib ridged boss center line.
The external frame molded line global shape of the streamlined groove of described imitative sharkskin can be triangle, fan-shaped, circular arc, crescent shape.
The external frame sidewall molded line of the streamlined groove of described imitative sharkskin can be helix, circular arc line, straight line, jaggies.
The left arc groove of the streamlined groove of described imitative sharkskin or the shape of right arc groove can be semicircle, rectangle, ellipse.
The downstream of the streamlined groove of described imitative sharkskin and type groove or type hole are connected, and described downstream type groove is arc groove or annular groove, and described downstream type hole sectional shape is rectangle, square, trapezoidal, V-arrangement, U-shaped, semicircle, ellipse.
For the operational condition of different rotary formula fluid machinery, by optimizing the geometrical structure parameter of the imitative streamlined groove of sharkskin, can satisfy under different occasions the usage requirement to sealability, but be specially adapted to the contactless face seals of bidirectional rotation.
Embodiment two
With reference to Fig. 4, the present embodiment and embodiment's one difference, the downstream that is the imitative streamlined groove of sharkskin and its alloytype groove 5 or type hole 6 are connected, to improve groove root place end face circumferentially and the pressure distribution uniformity of near zone, the enhance fluid dynamic pressure effect, improve fluid film rigidity, improve the starting characteristic of sealing and the antiwear property of low speed low pressure operation ability and end face.Described type groove 5 can be the molded line grooves such as annular groove 51, arc groove 52 or 53, and width and the degree of depth of type groove are respectively w
aAnd h
a, span is: w
a=0.5～2.0mm, h
a=h
g/ 5～h
g/ 2, h wherein
gIt is the degree of depth of the imitative streamlined groove of sharkskin; Described type hole 6 is grade regular sections holes, and its sectional shape can be rectangle, square, trapezoidal, V-arrangement, U-shaped, semicircle or oval, and the diameter in described type hole or the length of side and the degree of depth are respectively d
dAnd h
d, span is: to liquid medium d
d=0.1～2.5mm, h
d=h
g/ 5～h
g/ 2; To gas medium d
d=0.05～0.75mm, h
d=h
g/ 10～h
g/ 3.All the other structures and mode of execution are identical with embodiment one.
Embodiment three
With reference to Fig. 5, the present embodiment and embodiment's one difference are that left arc groove 21 and right arc groove 22 are rendered as the convergence type ledge structure that the upstream is dark, the downstream is shallow.Described convergence type fluid type groove can be a step, two steps or a plurality of step, but be the controlled working cost, satisfying under the prerequisite of certain cost performance, generally with two or three steps for well, the minimum-depth in the left arc groove of described convergence type or right arc groove downstream side should satisfy: be not less than 0.25mm when the seal fluid medium, be not less than 1.0 μ m when the sealing gas medium; In addition, in sealing stability and the higher occasion of lubricating end surface requirement, also can adopt convergence type sloping platform stage structure, the tilt angle on described sloping platform rank is 2～10 to spend.The streamlined groove end surface mechanical sealing of imitative sharkskin that adopts convergence type ledge structure is that rotating speed is lower or start-up course is long or operate the demand that operating mode is easy to applications such as undergoing mutation in order to satisfy; draw effect to strengthen face type groove pump; improve fluid film rigidity; the phenomenon of avoiding dry grinding occurs; safety reliability when guaranteeing the machine operation also plays energy-conservation purpose simultaneously.All the other structures and mode of execution are identical with embodiment one.
Embodiment four
With reference to Fig. 6, the present embodiment and embodiment's one difference are that the transition portion 241 of the streamlined groove of the above imitative sharkskin of seal face and 242 sidewall molded line are the flexuose molded line, are the fluid type grooves of imitating the biological fin form structure of marine fishes such as shark.Described flexuose molded line can be outer flexuose molded line, can be also interior flexuose molded line, can be also inside and outside staggered flexuose molded line, and the center elementary contour molded line of toothed edge is typical smooth molded line, comprises the basic molded line such as helix, circular arc line, straight line.The three actual uses in conjunction with the embodiments of the streamlined groove of the described imitative sharkskin of the present embodiment, the corresponding number of steps of the number of teeth.Main application is also identical with embodiment three.All the other structures and mode of execution are identical with embodiment one.
Embodiment five
Referring to Fig. 7, the present embodiment and embodiment's one difference are that the circumferential transition curve of the streamlined groove transition portion 241 of described imitative sharkskin and 242 is asymmetric waviness, comprise the shapes such as sine wave, cosine wave, skew lines ripple or exponential wave.Though symmetrical waviness can make pressure distribution more even and can effectively prevent the accumulation of fluid-encapsulated middle particle, but can weaken the sealing hydrostatic effects, reduce bearing capacity and rigidity, and the asymmetrical wave degree hydrodynamic effect be can improve greatly, seal carrier power and rigidity increased.All the other structures and mode of execution are identical with embodiment one.
The described content of this specification embodiment is only exemplifying the way of realization of inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also reaches conceives the equivalent technologies means that can expect according to the present invention in those skilled in the art.
Claims (9)
1. imitate the streamlined groove end surface mechanical sealing structure of shark skin surface gauffer profile, comprise two mechanical seal rings, it is rotating ring, stationary ring, it is characterized in that: in described rotating ring or stationary ring, the end face of at least one seal ring is provided with many groups along the streamlined groove of the imitative shark skin surface gauffer profile that circumferentially distributes, this biomimetic type groove comprises left arc groove (21), right arc groove (22), in type groove (2) along transition portion (241) and (242) between the outer contour of Pressure Drop direction boss (23) and boss (23) both sides and type groove (2), consist of the streamlined groove (2) of the similar shark skin surface gauffer of profile, namely imitate the streamlined groove of sharkskin, the streamlined groove of described imitative sharkskin is arranged at end face medium high pressure side, i.e. upstream, the overall profile of the streamlined groove of described imitative sharkskin is collapsed shape along the Pressure Drop direction, the streamlined groove of described imitative sharkskin is according to end face circumferential arrangement forming tank endless belt, except the planar rings region of unslotted on type grooved ring band exterior edge face is the sealing dam.
2. sealing configuration as claimed in claim 1, is characterized in that: fluid type groove depth h when being used for the seal fluid medium
gSpan be h
g=0.25～3.5mm, the preferred value scope is h
g=0.5～2.2mm and be specially adapted to the high pressure occasion; Fluid type groove depth h when being used for the sealing gas medium
gSpan be h
g=1～20 μ m, the preferred value scope is h
g=3.5～9.5 μ m.
3. sealing configuration as claimed in claim 2, it is characterized in that: be circumferential smooth waviness transition between described boss and described transition portion, the transition waviness curve is sine wave, cosine wave, oblique line ripple, exponential wave.
4. sealing configuration as claimed in claim 3, it is characterized in that: described boss and transition portion thereof are contour plane.
5. sealing configuration as claimed in claim 4, it is characterized in that: described left and right arc groove is arranged symmetrically with the center line of described boss.
6. sealing configuration as claimed in claim 5 is characterized in that: the external frame molded line global shape of the streamlined groove of described imitative sharkskin can be triangle, fan-shaped, circular arc, crescent shape.
7. sealing configuration as claimed in claim 6, it is characterized in that: the external frame sidewall molded line of the streamlined groove of described imitative sharkskin can be helix, circular arc line, straight line, jaggies.
8. sealing configuration as claimed in claim 7, it is characterized in that: the left arc groove of the streamlined groove of described imitative sharkskin or the shape of right arc groove can be semicircle, rectangle, ellipse.
9. sealing configuration as claimed in claim 8, it is characterized in that: the downstream of the streamlined groove of described imitative sharkskin and type groove or type hole are connected, described downstream type groove is arc groove or annular groove, and described downstream type hole sectional shape is rectangle, square, trapezoidal, V-arrangement, U-shaped, semicircle, ellipse.
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|---|---|---|---|
| CN201310059701.8A CN103122998B (en) | 2013-02-26 | 2013-02-26 | Imitative sharkskin streamline type groove end surface mechanical sealing structure |
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|---|---|---|---|
| CN201310059701.8A CN103122998B (en) | 2013-02-26 | 2013-02-26 | Imitative sharkskin streamline type groove end surface mechanical sealing structure |
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| CN103122998A true CN103122998A (en) | 2013-05-29 |
| CN103122998B CN103122998B (en) | 2015-10-28 |
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| 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 |
| CN103470771A (en) * | 2013-09-06 | 2013-12-25 | 浙江工业大学 | End face mechanical seal structure with air inlet grooves and micropores |
| CN107524806A (en) * | 2017-07-11 | 2017-12-29 | 浙江工业大学 | The imitative shell type tank liquid lubricating mechanical sealing structure of crateriform texture shape |
| CN110500409A (en) * | 2019-09-11 | 2019-11-26 | 浙江工业大学 | A kind of micro-bulge cluster mechanical face seals with reduction microorganism adhesive function |
| CN113090486A (en) * | 2021-04-02 | 2021-07-09 | 燕山大学 | Axial plunger pump piston shoe friction pair with shark skin imitation structure |
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| CN113530973A (en) * | 2021-06-28 | 2021-10-22 | 中国地质大学（北京） | High-temperature-resistant thrust bearing and axial dynamic sealing and lubricating structure |
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| CN114251457A (en) * | 2021-12-17 | 2022-03-29 | 浙江工业大学 | Tandem arc groove type bidirectional rotary seal end face structure |
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| CN103470771A (en) * | 2013-09-06 | 2013-12-25 | 浙江工业大学 | End face mechanical seal structure with air inlet grooves and micropores |
| 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 |
| CN107524806A (en) * | 2017-07-11 | 2017-12-29 | 浙江工业大学 | The imitative shell type tank liquid lubricating mechanical sealing structure of crateriform texture shape |
| CN107524806B (en) * | 2017-07-11 | 2019-02-01 | 浙江工业大学 | The imitative shell type tank liquid lubricating mechanical sealing structure of crateriform texture shape |
| CN113348307A (en) * | 2019-02-04 | 2021-09-03 | 伊格尔工业股份有限公司 | Sliding component |
| CN113348307B (en) * | 2019-02-04 | 2023-11-14 | 伊格尔工业股份有限公司 | Sliding member |
| US11767916B2 (en) | 2019-02-14 | 2023-09-26 | Eagle Industry Co., Ltd. | Sliding components |
| US11821461B2 (en) | 2019-02-15 | 2023-11-21 | Eagle Industry Co., Ltd. | Sliding components |
| CN110500409A (en) * | 2019-09-11 | 2019-11-26 | 浙江工业大学 | A kind of micro-bulge cluster mechanical face seals with reduction microorganism adhesive function |
| CN110500409B (en) * | 2019-09-11 | 2024-06-07 | 浙江工业大学 | Micro-convex body cluster surface mechanical seal with function of reducing microbial adhesion |
| CN113090486A (en) * | 2021-04-02 | 2021-07-09 | 燕山大学 | Axial plunger pump piston shoe friction pair with shark skin imitation structure |
| CN113530973B (en) * | 2021-06-28 | 2022-01-04 | 中国地质大学（北京） | High-temperature-resistant thrust bearing and axial dynamic sealing and lubricating structure |
| CN113530973A (en) * | 2021-06-28 | 2021-10-22 | 中国地质大学（北京） | High-temperature-resistant thrust bearing and axial dynamic sealing and lubricating structure |
| CN113719614A (en) * | 2021-09-15 | 2021-11-30 | 北京化工大学 | Low-leakage long-life interconnected channel alloy cast iron elastic sealing ring structure |
| CN113719614B (en) * | 2021-09-15 | 2024-06-25 | 北京化工大学 | Low-leakage long-service-life interconnected channel alloy cast iron elastic sealing ring structure |
| CN114251457A (en) * | 2021-12-17 | 2022-03-29 | 浙江工业大学 | Tandem arc groove type bidirectional rotary seal end face structure |
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