CN202327105U - Mechanical sealing device for fixed taper type waveform curved surface - Google Patents
Mechanical sealing device for fixed taper type waveform curved surface Download PDFInfo
- Publication number
- CN202327105U CN202327105U CN2011204388361U CN201120438836U CN202327105U CN 202327105 U CN202327105 U CN 202327105U CN 2011204388361 U CN2011204388361 U CN 2011204388361U CN 201120438836 U CN201120438836 U CN 201120438836U CN 202327105 U CN202327105 U CN 202327105U
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- curved surface
- face
- waveform curved
- shallow slot
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Abstract
The utility model discloses a mechanical sealing device for a fixed taper type waveform curved surface. At least two shallow slots which extend from the circumferential edge to the center and have continuously reduced depths are formed on a sealing end face between a rotary ring and a static ring at equal intervals along a circumference; the shallow slots are waveform curved surface grooves which are formed on the end face at equal intervals along the circumference and have gradually reduced widths from the periphery to the center; an unfolded shape of a groove-shaped section of any circumferential surface is a continuous, smooth and periodically fluctuated wavy curve; an extension line of any centripetal line on the bottom surface of each shallow slot is intersected on a central axis of the end face in a manner of forming the same inclination angle with the end face; and the wavy concave surface of each shallow slot is a moving trace of the centripetal line with the inclination angle, namely a compound moving trace of circumference motion of the centripetal line around the central axis of the end face and periodic reciprocating motion of an intersection of the centripetal line and the central axis within a set range on the central axis. According to the mechanical sealing, the thickness change, the rigidity change and the like of a liquid membrane are uniform and smooth, and a step sudden change does not exist; and the mechanical sealing device has an outstanding hydrodynamic effect, and runs stably and reliably.
Description
Technical field
The utility model relates to a kind of contactless end face dynamic seal apparatus of rotating machinery axial end, is applicable to the axial end sealing of the rotation type machines such as pump, reaction kettle, compressor, decompressor, seperator of various types.
Background technique
Mechanical seal is widely used in the axial end face seal of numerous rotating machineries, and contact-type and contactless branch are arranged.In the contact-type mechanical seal structure, sealing surface causes sealability to descend rapidly because of phenomenons such as friction, wearing and tearing, heating, distortion are serious, causes unstable working condition, and the life-span is short, easy fault.Non-contact mechanical seal is through on seal face, offering shallow grooves, to produce the hydrodynamic effect; Form fluid film after making fluid get into the frictional fit end face of rotating ring and stationary ring, dynamic and static ring sealing is separated, reach contactless running; Play effect lubricated and that increase the service life, can prevent effectively that again sealed medium from passing through the leakage of seal face, its working state is more stable; Reliably, long service life.It will obtain more applications in future with more superior performance and lower maintenance cost.But its leakage rate is relatively large, and stability receives to be sealed the influence of generating unit speed and dielectric behavior to a great extent.
In the shape of present dynamic pressure groove, the most typical with equivalent gullet depth spiral chute and the end face seal of " T " shape groove.
Spiral flute type dynamic pressure effect highly significant.Compare with other grooveds, it has the bearing capacity height, and fluid film rigidity is big, advantages such as good stability, but its sealing surface can only unidirectionally rotate.The Chinese patent document of publication number CN1415877A discloses a kind of double helix angle three-dimensional spiral groove face seals; The upper reaches of the spiral shallow slot of offering on its end face are that the high pressure side is wideer, downstream are that low voltage side is narrower; The degree of depth of groove is that the high pressure side is that low voltage side shoals gradually to downstream from the upper reaches, thereby forms a kind of three-dimensional convergent contour spiral chute.This double helix angle three-dimensional spiral groove face seals can obtain bigger fluid film rigidity, but the processing of the grooved of the bottom land of its inclination and spiral is very difficult, and such sealing can only unidirectionally be rotated.CN1401954A discloses a kind of spiral chute end surface mechanical sealing by the angular microflute group composition; Its angular microflute trend is consistent with the spiral chute direction, and the sealing end face shallow slot structure more complicated that seems is because of this angular microflute moves towards distribution along spiral chute; And there is not tangible collapsed shape; Can obtain the higher fluid film rigidity of more common spiral chute to a certain extent, but its complicated angular microflute family processing is very difficult, and still can only unidirectionally rotates.
" T " shape groove end face seal dynamic pressure effect is comparatively remarkable, and its end fluid film bearing capacity and fluid film rigidity are bigger, but its largest benefit is to realize two-way rotation.Also have the distortion groove of a lot of spiral chutes and " T " shape groove in the practicality, its common trait is that fluid film rigidity and fluid film bearing capacity greatly then often can only unidirectionally be rotated; But the grooved of the two-way rotation of ability has lower fluid film rigidity and fluid film bearing capacity.But it basically all is to wait deep trouth; The groove depth that is whole flute profiles edge all is directly to reach its consistent bottom land degree of depth by the notch plane with the deflection angle form; Cause liquid film thickness, stiffness variation etc. groove being arranged and not having the step evolution sudden change of groove location, influenced the stability and the reliability of sealing maneuverability.And under different medium, the different generating unit speed condition, the solution of noncontact seal stability will be a key issue that influences the non-contact mechanical seal extensive use.
The model utility content
To above-mentioned situation, the utility model provides the two-way rotation of a kind of ability and has possessed the contactless end face dynamic seal apparatus of higher fluid film rigidity and fluid film bearing capacity.
The utility model is a kind of tapering type waveform curved surface mechanical seal device of deciding; Its basic structure is equally on rotating ring and the seal face between stationary ring relative with end face; There are at least two by periphery entad extends and groove depth reduces continuously shallow slot along circumference with spaced set; Each shallow slot is at its end face upper edge, place circumference spaced set, width waveform curved surface groove (being the dynamic pressure wavy surface) by the continuous constriction of periphery centrality, and the channel-section expansion shape on its arbitrary circumferential surface is the wavy curve of continuously smooth periodic relief.The elongation line of the arbitrary entad line on each shallow slot bottom surface is all to be intersected on the end face central axis with mode that Transverse plane has an identical oblique angle; And the waveform concave of said each shallow slot is a kind of movement locus with the entad line at this oblique angle; Promptly this entad wire-wound end face central axis circular movement and this entad the joint of line and central axis make the compound motion track of cyclic movement simultaneously in the setting range on central axis.
In the said structure, with regard to the shape in the circumferencial direction cross section of said each waveform curved surface groove type shallow slot, can be monosymmetric shape with respect to the radial line at its groove face center, also can be anisopleural shape.Whether the symmetry of its groove shape, depends on the variation of speed when with said oblique angle this entad made circular movement and/or axially reciprocating in the line compound motion or the character of its variation, and can use needs that it is adjusted or sets according to difference.And the quantity of waveform curved surface groove type shallow slot then depends on the frequency speed of said this oscillation cycle when entad the joint of line and central axis is made axially reciprocating on central axis.
Therefore; Further optimal way is; The shape of above-mentioned waveform curved surface groove type shallow slot be adopted as the entad wire-wound end face central axis with this oblique angle do uniform circular motion and this entad the joint of line and central axis make the compound motion track of cyclic movement simultaneously in the setting range on central axis.Wherein preferred especially, be to make the channel-section expansion shape of each waveform curved surface groove type shallow slot on arbitrary circumferential surface be rendered as a continuous sine or the shape of cosine curve.
Experimental result shows; Except that being satisfied or adapting to the special use needs; With the oblique angle between arbitrary entad line and its place Transverse plane in the said waveform curved surface groove type shallow slot in the said structure be arranged on 20 °＞| α | in＞0 ° of scope, can adapt to and satisfy use needs generally speaking usually.Wherein, under the identical prerequisite of other dynamic pressure wavy surface parameter, the dynamic pressure effect is the most more preferably form, be scope with this oblique angle be set at 2 °＞| α |＞0 °.
The experiment demonstration, under the identical prerequisite of other dynamic pressure wavy surface parameter, the increase of servo-actuated corrugating curved surface, the dynamic pressure effect strengthens.Therefore, except that being satisfied or answering the special use needs that said this waveform curved surface groove type shallow slot is 4 ~ 36 at its end face upper edge, place circumference spaced set in the said structure, can satisfy use needs generally speaking usually.
In addition; Except that being satisfied or adapting to the special use needs; And have said oblique angle in the said structure this entad the to-and-fro motion scope of joint on this central axis of line and end face central axis be set at≤3 millimeters, also is a kind of preferable range that can satisfy use needs generally speaking usually.
Except that for adapting to and/or satisfy the specific use needs, said shallow slot in the said structure all is to be opened in the suitable annular region of radial outside of seal face usually.Therefore; In being not precluded within the Zone Full of seal face, all offer under the situation of said shallow slot; The preferred arrangement of the waveform curved surface groove type shallow slot that the utility model is above-mentioned is to be opened on its place end face in the outer radial periphery annular section outside >=2 millimeters the looped end plane domain (promptly sealing the dam plane domain) of radially inner side distance.Experimental result shows, under the identical prerequisite of other dynamic pressure wavy surface parameter, is reducing of dam width with seal ring end face seal dam radial distance, and the dynamic pressure effect will strengthen.
According to the use needs; Said waveform curved surface groove type shallow slot in the above-mentioned seal arrangement of the utility model; Can adopt a side that only is arranged in rotating ring or the relative both sides sealing end face of stationary ring is the form of mechanical single seal, also can be that double seals etc. is multi-form on rotating ring or the relative both sides sealing end face of stationary ring.
Further, on the single-stage sealing configuration basis of adopting the utility model said structure form seal arrangement separately, the needs according to reality is used also can have the variation and/or the combination of various ways on the total arrangement of sealing.For example, can adopt tandem seal (more than the two-stage), the middle labyrinth (more than the two-stage) of series connection band, can also use with other seal style combination such as floating-ring seal, carbocyclic ring sealing, labyrinth seal.
Outside diameter in this mechanical seal device of the utility model is the high pressure side, and internal side diameter is a low voltage side, and the leakage direction of sealing medium is for to be leaked to internal side diameter by outside diameter.During work, sealed medium flows into end face by the opening of each wavy curvilinear dynamic pressure shallow slot outside diameter.Rotation along with sealing surface; Sealing medium is gradually reduced in shallow slot; Pressure raises, and finally near shallow slot and sealing surface boundary, reaches the pressure extreme value, has just formed very strong hydrodynamic effect like this between sealing surface; Thereby obtained very high fluid film rigidity, promoted the stability of sealing.
The dynamic pressure shallow slot of the dynamic pressure wavy surface of the utility model said structure can be used for two-way rotation, when the sealing clockwise and anticlockwise, can both produce enough hydrodynamic pressures.And because this dynamic pressure shallow slot adopts is the wavy curvilinear waveform curved surface that the expansion shape of its circumferential section is the continuously smooth periodic relief; Be its groove both sides of the edge and being connected and the recessed change in depth of groove of end face; All the time all be the transition gradually of smoothed curve shape; The degree of depth of groove radially also is linear increase gradually from inside to outside, makes this dynamic pressure wavy surface seal ring can have remarkable dynamic pressure effect, and promptly liquid film thickness, stiffness variation etc. are evenly smooth-going; The step evolution sudden change that does not have traditional dynamic pressure shallow slot structure to exist; Thereby make the sealing ride quality more stable, reliable, not only more be superior to the dynamic pressure sealing effect of traditional flute profile, but also be particularly suitable for that the stability, the reliability requirement that move are high especially, service life is longer to sealing at working condition sealing effect down usually; No stand-by provision does not have the possible working condition of maintenance in the operation period.
Below in conjunction with embodiment, the foregoing of the utility model is remake further detailed description by the accompanying drawing illustrated embodiment.But should this be interpreted as that the scope of the above-mentioned theme of the utility model only limits to following instance.Do not breaking away under the above-mentioned technological thought situation of the utility model, various replacements or change according to ordinary skill knowledge and customary means are made all should be included in the scope of the utility model.
Description of drawings
Fig. 1 is the schematic representation of the seal face state of dynamic pressure wavy surface shallow slot structure in a kind of seal arrangement of the utility model.
Fig. 2 is the schematic representation of the A-A axial section structure of Fig. 1.
Fig. 3 is the local structure for amplifying schematic representation of this dynamic pressure wavy surface shallow slot in the rotating ring among Fig. 2.
Fig. 4 is the schematic representation of the seal face state of dynamic pressure wavy surface shallow slot structure in the another kind of seal arrangement of the utility model.
Embodiment
Like Fig. 1 ~ shown in Figure 3, on stationary seat 6, be provided with stationary ring 2 through structures such as stop pin 3, throw-out collar 4, seal ring 5, springs 7, with its end face relative engagement one rotating ring 1 is installed, this opposing end surface is a seal face therebetween.On the one or both sides seal face betwixt (shown in the figure is the mechanical single seal form in rotating ring 1 side); In the outer radial periphery annular section outside the sealing dam width is >=2 millimeters looped end plane domain 9 of its radially inner side distance; Have 4 ~ 36 entad to extend along the circumference spaced set, and the degree of depth LINEAR CONTINUOUS of groove reduce, the width of groove is by the shallow slot 8 of the waveform curved surface groove of the continuous constriction of periphery centrality by periphery.The channel-section expansion shape of this shallow slot 8 on arbitrary circumferential surface is the wavy curve of continuously smooth periodic relief.The elongation line of the arbitrary entad line 10 on each shallow slot 8 bottom surface is all to be intersected on the end face central axis 11 with mode that Transverse plane has an identical oblique angle α; And the waveform concave of said each shallow slot is a kind of movement locus with entad line 10 of this oblique angle α; That is: this entad line 10 around the circular movement of end face central axis 11 and this entad the joint of line 10 and central axis 11 make the compound motion track of cyclic movement simultaneously in the setting range H on central axis 11.The scope of said this oblique angle α be 20 °＞| α |＞0 °, preferred scope be 2 °＞| α |＞0 °.The reciprocating setting range H of the joint of this entad line 10 with oblique angle α and central axis 11 on this central axis 11≤3 millimeters.
The shallow slot 8 of waveform curved surface groove shown in Figure 1; Be simultaneously at the uniform velocity to make circular movement by this entad line 10 around end face central axis 11 with oblique angle α; Entad make the formed track of cyclic movement in the setting range H of joint on central axis 11 of line 10 and central axis 11 with this; Be that each waveform curved surface groove type shallow slot 8 both sides with respect to its center radial line is symmetric forms, particularly preferably be and make the channel-section expansion shape of each waveform curved surface groove type shallow slot 8 on arbitrary circumferential surface be rendered as the shape of continuous sine (or cosine) curve.
Embodiment 2
As shown in Figure 4; Different being of this routine seal arrangement and embodiment's 1 structure; Between the shallow slot 8 of the adjacent two waveform curved surface grooves of each in embodiment 1 seal face, also respectively offer the T shape seal groove 12 of a conventional structure form, form a kind of knockdown sealing configuration.
Claims (10)
1. decide tapering type waveform curved surface mechanical seal device; On the seal face between rotating ring relative (1) and stationary ring (2) with end face; There are at least two by periphery entad extends and groove depth reduces continuously shallow slot along circumference with spaced set; It is characterized in that each shallow slot (8) is at its end face upper edge circumference spaced set, width waveform curved surface groove by the continuous constriction of periphery centrality; Channel-section expansion shape on its arbitrary circumferential surface is the wavy curve of continuously smooth periodic relief; The elongation line of the arbitrary entad line (10) on each shallow slot (8) bottom surface is all to be intersected on the end face central axis (11) with mode that Transverse plane has an identical oblique angle (α); The waveform concave of said each shallow slot for entad line (10) with this oblique angle (α) around the circular movement of end face central axis (11) and this entad the joint of line (10) and central axis (11) make the compound motion track of cyclic movement simultaneously in the setting range (H) on central axis (11).
2. as claimed in claim 1ly decide tapering type waveform curved surface mechanical seal device, it is characterized in that in the said waveform curved surface groove type shallow slot (8) oblique angle between arbitrary entad line (10) and its place Transverse plane be 20 °＞| α |＞0 °.
3. as claimed in claim 2ly decide tapering type waveform curved surface mechanical seal device, it is characterized in that in the said waveform curved surface groove type shallow slot (8) oblique angle between arbitrary entad line (10) and its place Transverse plane be 2 °＞| α |＞0 °.
4. as claimed in claim 1ly decide tapering type waveform curved surface mechanical seal device, it is characterized in that said waveform curved surface groove type shallow slot (8) is 4 ~ 36 of being provided with in its place end face equal intervals.
5. as claimed in claim 1ly decide tapering type waveform curved surface mechanical seal device, the entad line (10) that it is characterized in that having said oblique angle (α) and the reciprocating setting range (H)≤3 of joint on central axis (11) of central axis (11) millimeter.
6. as claimed in claim 1ly decide tapering type waveform curved surface mechanical seal device, the shallow slot (8) that it is characterized in that said waveform curved surface groove type is arranged on its place end face in the outer radial periphery annular section outside >=2 millimeters the looped end plane domain (9) of radially inner side distance.
7. as claimed in claim 1ly decide tapering type waveform curved surface mechanical seal device; It is characterized in that the entad line (10) that being shaped as of said waveform curved surface groove type shallow slot (8) has this oblique angle (α) makes uniform circular motion around end face central axis (11); With this entad the joint of line (10) and central axis (11) make the compound motion track of cyclic movement simultaneously in the setting range (H) on central axis (11), and the channel-section expansion shape of each waveform curved surface groove type shallow slot (8) on arbitrary circumferential surface is rendered as a continuous sine or the shape of cosine curve.
8. as claimed in claim 1ly decide tapering type waveform curved surface mechanical seal device, it is characterized in that said waveform curved surface groove type shallow slot (8) is arranged in Zone Full of its place end face.
9. decide tapering type waveform curved surface mechanical seal device as one of claim 1 to 8 is described, it is characterized in that said waveform curved surface groove type shallow slot (8) is arranged at least one side end face in rotating ring (1) two seal faces relative with stationary ring (2).
10. decide tapering type waveform curved surface mechanical seal device as one of claim 1 to 8 is described, it is characterized in that between the shallow slot (8) of said adjacent two waveform curved surface groove types, also being provided with the T shape seal groove (12) of conventional structure form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204388361U CN202327105U (en) | 2011-11-09 | 2011-11-09 | Mechanical sealing device for fixed taper type waveform curved surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204388361U CN202327105U (en) | 2011-11-09 | 2011-11-09 | Mechanical sealing device for fixed taper type waveform curved surface |
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| CN202327105U true CN202327105U (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204388361U Expired - Lifetime CN202327105U (en) | 2011-11-09 | 2011-11-09 | Mechanical sealing device for fixed taper type waveform curved surface |
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| CN (1) | CN202327105U (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104455448A (en) * | 2014-07-07 | 2015-03-25 | 余文清 | Wide seal |
| CN104930193A (en) * | 2015-06-04 | 2015-09-23 | 霍凤伟 | Sealing ring |
| CN104989821A (en) * | 2015-06-04 | 2015-10-21 | 霍凤伟 | Mechanical seal with shallow slots |
| CN105402411A (en) * | 2015-09-23 | 2016-03-16 | 霍凤伟 | Sealing ring and mechanical sealing device with same |
| CN105840546A (en) * | 2016-03-25 | 2016-08-10 | 上海理工大学 | Centripetal fan |
| CN105952900A (en) * | 2016-07-10 | 2016-09-21 | 西华大学 | Sealing ring with wave-shaped groove end surface and mechanical sealing device |
| CN106439023A (en) * | 2016-07-28 | 2017-02-22 | 浙江工业大学 | Cosine curve mechanical seal end surface structure |
| CN106574725A (en) * | 2014-09-04 | 2017-04-19 | 伊格尔工业股份有限公司 | Mechanical seal |
| CN107532726A (en) * | 2015-05-19 | 2018-01-02 | 伊格尔工业股份有限公司 | Slide unit |
| CN107532724A (en) * | 2015-05-21 | 2018-01-02 | 伊格尔工业股份有限公司 | Slide unit |
| CN107676294A (en) * | 2017-09-28 | 2018-02-09 | 江苏大学 | A kind of shaft sealer suitable for HTHP multistage pump |
| CN114174702A (en) * | 2018-06-27 | 2022-03-11 | 机械制造中心设计局股份公司 | End sealing friction pair component |
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2011
- 2011-11-09 CN CN2011204388361U patent/CN202327105U/en not_active Expired - Lifetime
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104455448A (en) * | 2014-07-07 | 2015-03-25 | 余文清 | Wide seal |
| CN106574725A (en) * | 2014-09-04 | 2017-04-19 | 伊格尔工业股份有限公司 | Mechanical seal |
| CN106574725B (en) * | 2014-09-04 | 2019-04-16 | 伊格尔工业股份有限公司 | Mechanical sealing member |
| US10054230B2 (en) | 2014-09-04 | 2018-08-21 | Eagles Industry Co., Ltd. | Mechanical seal |
| CN107532726A (en) * | 2015-05-19 | 2018-01-02 | 伊格尔工业股份有限公司 | Slide unit |
| CN107532726B (en) * | 2015-05-19 | 2020-09-22 | 伊格尔工业股份有限公司 | Sliding component |
| CN107532724A (en) * | 2015-05-21 | 2018-01-02 | 伊格尔工业股份有限公司 | Slide unit |
| CN104989821A (en) * | 2015-06-04 | 2015-10-21 | 霍凤伟 | Mechanical seal with shallow slots |
| CN104930193A (en) * | 2015-06-04 | 2015-09-23 | 霍凤伟 | Sealing ring |
| CN105402411A (en) * | 2015-09-23 | 2016-03-16 | 霍凤伟 | Sealing ring and mechanical sealing device with same |
| CN105840546A (en) * | 2016-03-25 | 2016-08-10 | 上海理工大学 | Centripetal fan |
| CN105952900A (en) * | 2016-07-10 | 2016-09-21 | 西华大学 | Sealing ring with wave-shaped groove end surface and mechanical sealing device |
| CN106439023A (en) * | 2016-07-28 | 2017-02-22 | 浙江工业大学 | Cosine curve mechanical seal end surface structure |
| CN107676294A (en) * | 2017-09-28 | 2018-02-09 | 江苏大学 | A kind of shaft sealer suitable for HTHP multistage pump |
| CN114174702A (en) * | 2018-06-27 | 2022-03-11 | 机械制造中心设计局股份公司 | End sealing friction pair component |
| JP7348920B2 (en) | 2018-06-27 | 2023-09-21 | ジョイント ストック カンパニー“セントラル デザイン ビューロー オブ マシン ビルディング” | Mechanical seal friction pair elements |
| CN114174702B (en) * | 2018-06-27 | 2024-04-23 | 机械制造中心设计局股份公司 | End seal friction pair member |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120711 |