CN202171002U - Conical surface mechanical sealing device - Google Patents
Conical surface mechanical sealing device Download PDFInfo
- Publication number
- CN202171002U CN202171002U CN2011200478392U CN201120047839U CN202171002U CN 202171002 U CN202171002 U CN 202171002U CN 2011200478392 U CN2011200478392 U CN 2011200478392U CN 201120047839 U CN201120047839 U CN 201120047839U CN 202171002 U CN202171002 U CN 202171002U
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- conical surface
- sealing
- seal
- face
- mechanical seal
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Abstract
The utility model relates to a conical surface mechanical sealing device which is characterized in that a mechanical sealing static ring 1 is provided with a conical surface a, a rotary ring 2 is provided with a conical surface b, and a sealed surface is formed by matching the conical surface a and the conical surface b; and the sealed surface can be formed by the conical surface a and the conical surface b which are directly contacted with each other or separated from each other by a tiny gap. The conical surface mechanical sealing device has the advantages that compared with the traditional mechanical seal, two sealing rings of the conical surface mechanical sealing device have better automatic centering performance and better capability of resisting torsional deflection of an axial section and bending deformation of a main shaft of a unit. The conical surface mechanical sealing device is applicable to sealing shaft ends of various rotating machines.
Description
Technical field
The utility model belongs to the shaft end seal of rotating machinery, and particularly a kind of Conic Mechanical Seal device, this Conic Mechanical Seal device can be used for the shaft end seal of rotation type machine such as the compressor, decompressor, seperator, pump, reaction kettle of various types.
Background technique
Mechanical seal is widely used in numerous rotating machinery axle heads; Complexity because of its working condition; Further investigation to mechanical seal will be long-term, arduous and must constantly an advance process; Particularly seal the research of mating face's shape and performance thereof, be the emphasis and the difficult point problem of The Seal Technology Study always.Two processes have mainly been experienced in the research and development of rotating machinery axle head motive sealing:
1. radial seal
Early stage rotating machinery main shaft seal adopts labyrinth seal, and the labyrinth seal leakage rate is bigger, and can only adapt to the lower occasion of pressure, needs complicated auxiliary system to handle a large amount of seal leakage gas usually.Second generation rotating machinery main shaft seal is the floating-ring seal of film lubrication.In typical floating-ring seal, two groups of sealing surfaces are arranged, the fluid that pressure is high slightly than sealed medium pressure is injected in the sealing system, stops the leakage of sealed medium, simultaneously the coolant seal element.Until today, still have a small amount of floating-ring seal on the rotation unit, to move.Floating-ring seal exists the quench fluid consumption big, and sealing oil system is complicated, and investment is many, and floor space is big, shortcomings such as operation and maintenance cost height.
Labyrinth seal and floating-ring seal all belong to radial seal, are the radial space between main shaft and stationary seal face is sealed.Because guarantee enough gaps, come in contact between main shaft and stationary seal face preventing, thereby limited technical merit and working life that this type of sealing can reach.
2. end face seal
Nineteen fifty, the researcher has developed contact-type mechanical seal, and is applied to the refrigeration industry, prevents that the cooling liquid of costliness from leaking vertically.This contact-type mechanical seal belongs to end face seal; Different with radial seal; Its actual sealing surface is perpendicular to two surfaces (plane) of rotating machinery main shaft, and such structure allows the directly contact in the workpiece process of dynamic and static Sealing, thus the sealability of increasing substantially.
Early stage mechanical seal is contact-type mechanical seal; Be sealed into the master with wet type; Subsequently; On the basis of contact-type mechanical seal, the technician has researched and developed out non-contact mechanical seal, and particularly dried operation type gas face seals (dry gas seals) has obtained extremely successful application in the rotating machinery axle head sealing that with the compressor is representative.
Present mechanical seal belongs to end face seal, and its actual sealing surface is perpendicular to two surfaces (plane) of rotating machinery main shaft, is characterized in:
1) insensitive to the wearing and tearing of sealing surface.Behind the contact seal surface abrasion, floating ring can compensate wear extent under the effect of closing force automatically, and noncontact seal does not have surface abrasion basically.
2) axial float had good tracing ability.
More than 2 conclusions get up, all showed in fact end face seal along the spin axis direction anti-ly move, the superior function of factor such as wearing and tearing.But self-alignment performance for two seal ring axis in the sealing installation and operation process; And when the torsional deflection of seal face generation along the axle section; Or the set main shaft at rotating ring place occurs bending and deformation local contact pressure increase between two sealing surfaces that caused, fretting wear aggravation; And the circumferentially processing of problem such as pulsation of the noncontact seal end face fluid film pressure that produces therefrom, present end surface mechanical sealing has to be strengthened.And for above these problems, Conic Mechanical Seal then has stronger adaptability.
In sum; Design a kind of Conic Mechanical Seal device, this Conic Mechanical Seal device has automatic centering property, better section torsional deflection of anti-axle and the diastrophic ability of set main shaft; Thereby further widen the Applicable scope of mechanical seal, promote the working life of unit sealing.
Summary of the invention
The purpose of the utility model provides a kind of Conic Mechanical Seal device, and two seal rings of this Conic Mechanical Seal device have automatic centering property, better section torsional deflection of anti-axle and the diastrophic ability of set main shaft.
The purpose of the utility model is achieved in that a kind of Conic Mechanical Seal device; Form by the stationary ring that has conical surface a 1, the rotating ring 2 that has conical surface b and other correlated parts; The conical surface a of stationary ring 1 and the conical surface b on the rotating ring 2 are face-to-face installation; Form sealing surface, the sealing face can be that conical surface a directly contacts with conical surface b, also can be that conical surface a separates with a micro-gap with conical surface b.It is characterized in that: sealing surface is conical surface shape.
The utility model mainly adopts following technical measures to realize:
The conical surface a of said Conic Mechanical Seal device and conical surface b both can be that conical surface also can be the taper hole face, but when conical surface a was conical surface (taper hole face), conical surface b was necessary for taper hole face (conical surface).
The tapering α of the taper hole face of said Conic Mechanical Seal device
1Tapering α with conical surface
2Satisfy relation: 90 °＞α
1>=α
2＞0 °.
Among the conical surface a and conical surface b of said Conic Mechanical Seal device, can or on two conical surfaces, fluid dynamic pressure groove be set simultaneously at one, or two conical surfaces are not provided with fluid dynamic pressure groove.
Said Conic Mechanical Seal device, the fluid dynamic pressure groove that is provided with on its conical surface can be that deep trouth also can be a shallow slot, and its groove depth scope is between 0.01 micron～3 millimeters.
Said Conic Mechanical Seal device, the layout of its sealing can be the single-stage sealings of having only one group of sealing surface, tandem seal or the double seals that also can be made up of sealing surface more than two groups.
Said Conic Mechanical Seal device in multi-stage sealed layout, can be the combination seal that Conic Mechanical Seal follows other form motive sealing to form.
The utlity model has following characteristics:
1) seal face is the conical surface;
2) two seal rings have automatic centering property;
3) have better section torsional deflection of anti-axle and the diastrophic ability of set main shaft.
Description of drawings
Fig. 1 is a kind of contact seal structural representation that two sealing surfaces directly contact in the utility model Conic Mechanical Seal device.
Fig. 2 is a stationary ring upper conical sealing surface structure schematic representation in the utility model conical surface contact-type mechanical seal device.
Fig. 3 is a rotating ring upper conical sealing surface structure schematic representation in the utility model conical surface contact-type mechanical seal device.
Fig. 4 is a kind of noncontact seal structural representation that two sealing surfaces separate with a micro-gap in the utility model Conic Mechanical Seal device.
Fig. 5 is in the utility model Conic Mechanical Seal device, and sealing surface is carved with a kind of noncontact seal structural representation of equally distributed hydrodynamic shallow slot on the rotating ring.
Fig. 6 is a rotating ring conical seal (contact) face upper-end surface shallow slot structure schematic representation in the utility model conical surface non-contact mechanical seal device.
The symbol implication is following in the accompanying drawing:
α
1---taper hole face cone degree.
α
2---the conical surface tapering.
R
1---sealing surface shallow slot internal diameter.
R
2---sealing surface shallow slot external diameter.
A---the conical surface on the stationary ring.
B---the conical surface on the rotating ring.
C---sealing surface shallow slot structure.
ω
1---the rotating ring angular velocity of rotation.
h
0---contactless Conic Mechanical Seal end face axial gap.
H---the upper reaches (high pressure side).
L---downstream (low voltage side).
Embodiment
Below in conjunction with embodiment the utility model is analyzed.
The utility model practical implementation is of a great variety, whether offers the different analyzing examples explanations of dynamic pressure groove according to this Conic Mechanical Seal way of contact, sealing surface at this.
Embodiment 1: consult Fig. 1, Fig. 2, Fig. 3
Fig. 1 is the utility model embodiment 1 a structural representation.This Conic Mechanical Seal device comprises the stationary ring 1 that has conical surface a, the rotating ring 2 that has conical surface b, stationary seat 3, axle sleeve 4, round section joint ring 5, tolerance ring 6, clamping sleeve 7, throw-out collar 8, spring 9, stop pin 10 etc.The characteristics of present embodiment are: two sealing surfaces (that is: conical surface a and conical surface b) directly contact.
According to Fig. 1, Fig. 2, Fig. 3, the conical surface a on the stationary ring 1 is the taper hole face, and its tapering is α
1, the conical surface b on the rotating ring 2 is a conical surface, its tapering is α
2, two taperings relation is: α
1>=α
2Stationary ring 1 is face-to-face coaxial line with rotating ring 2 to be installed, and forms conical seal (contact) face, and the sealing face is that taper hole face a directly contacts with circular cone b, belongs to the contact-type mechanical seal device.
The outside diameter of seal ring is upstream side H, and internal side diameter is downstream side L, and the flow direction of dielectric leakage is to be leaked to internal side diameter (downstream side) by outside diameter (upstream side), and the effect of conical seal (contact) face is exactly the leakage flow that stops medium.
Embodiment 2: consult Fig. 4
Fig. 4 is the utility model embodiment 2 a structural representation.This Conic Mechanical Seal device comprises the stationary ring 1 that has conical surface a, the rotating ring 2 that has conical surface b, stationary seat 3, axle sleeve 4, round section joint ring 5, tolerance ring 6, clamping sleeve 7, throw-out collar 8, spring 9, stop pin 10 etc.The characteristics of present embodiment are: two sealing surfaces (that is: conical surface a and conical surface b) separate with a micro-gap h0.
According to Fig. 4, the conical surface a on the stationary ring 1 is the taper hole face, and its tapering is α
1, the conical surface b on the rotating ring 2 is a conical surface, its tapering is α
2, two taperings relation is: α
1>=α
2Stationary ring 1 is face-to-face coaxial line with rotating ring 2 to be installed, and forms conical seal (contact) face, and with a micro-gap h
0Separate, form taper noncontact seal face, belong to non-contact mechanical seal device.
The outside diameter of seal ring is upstream side H, and internal side diameter is downstream side L, and the flow direction of dielectric leakage is to be leaked to internal side diameter (downstream side) by outside diameter (upstream side), and the effect of taper noncontact seal face is exactly the leakage flow that stops medium.
Embodiment 3: consult Fig. 5, Fig. 6
Fig. 5, Fig. 6 are the utility model embodiment 3 structural representations.This Conic Mechanical Seal device comprises the stationary ring 1 that has conical surface a, the rotating ring 2 that has conical surface b, stationary seat 3, axle sleeve 4, round section joint ring 5, tolerance ring 6, clamping sleeve 7, throw-out collar 8, spring 9, stop pin 10 etc.The characteristics of present embodiment are: on rotating ring conical seal (contact) face b, offer fluid dynamic pressure groove c.
According to Fig. 5, the conical surface a on the stationary ring 1 is the taper hole face, and its tapering is α
1, the conical surface b on the rotating ring 2 is a conical surface, its tapering is α
2, two taperings relation is: α
1>=α
2Stationary ring 1 is face-to-face coaxial line with rotating ring 2 to be installed, and forms conical seal (contact) face, and two sealing surfaces are under the effect of shallow slot c hydrodynamic pressure, with a micro-gap h
0Separate, form taper noncontact seal face, belong to non-contact mechanical seal device.
The outside diameter of seal ring is upstream side H, and internal side diameter is downstream side L, and the flow direction of dielectric leakage is to be leaked to internal side diameter (downstream side) by outside diameter (upstream side), and the effect of taper noncontact seal face is exactly the leakage flow that stops medium.
In above embodiment, emphasis has embodied the Conic Mechanical Seal way of contact, whether sealing surface offers the dynamic pressure groove.In order more clearly to describe key problem; All only relate to the single-stage sealing configuration among the above embodiment; And in actual use; The sealing total arrangement can have multiple pattern as required like labyrinth (more than the two-stage) in the middle of: mechanical single seal, double seals, tandem seal (more than the two-stage), the series connection band, also can follow other seal style composition combined labyrinth and carbon gland such as floating-ring seal, carbocyclic ring sealing, labyrinth seal.
Claims (6)
1. Conic Mechanical Seal device; Form by the stationary ring that has conical surface a (1), the rotating ring (2) and other correlated parts that have a conical surface b; Conical surface b on conical surface a on the stationary ring (1) and the rotating ring (2) is face-to-face installation, forms sealing surface, and the sealing face can be that conical surface a directly contacts with conical surface b; Also can be that conical surface a separates with a micro-gap with conical surface b, it is characterized in that: sealing surface be conical surface shape.
2. Conic Mechanical Seal device according to claim 1; It is characterized in that: conical surface a and conical surface b both can be that conical surface also can be the taper hole face, but when conical surface a was conical surface, conical surface b was necessary for the taper hole face; When conical surface a was the taper hole face, conical surface b was necessary for conical surface.
3. Conic Mechanical Seal device according to claim 1 and 2 is characterized in that: the tapering α of taper hole face
1Tapering α with conical surface
2Satisfy relation: 90 °＞α
1>=α
2＞0 °.
4. Conic Mechanical Seal device according to claim 1 is characterized in that: among conical surface a and the conical surface b, can or on two conical surfaces, fluid dynamic pressure groove be set simultaneously at one, or two conical surfaces are not provided with fluid dynamic pressure groove.
5. Conic Mechanical Seal device according to claim 4 is characterized in that: the fluid dynamic pressure groove that is provided with on the conical surface can be that deep trouth also can be a shallow slot, and its groove depth scope is between 0.01 micron～3 millimeters.
6. Conic Mechanical Seal device according to claim 1 is characterized in that: the layout of sealing can be to have only the single-stage sealing of one group of sealing surface, tandem seal or the double seals that also can be made up of sealing surface more than two groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200478392U CN202171002U (en) | 2011-02-25 | 2011-02-25 | Conical surface mechanical sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200478392U CN202171002U (en) | 2011-02-25 | 2011-02-25 | Conical surface mechanical sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202171002U true CN202171002U (en) | 2012-03-21 |
Family
ID=45829198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200478392U Expired - Fee Related CN202171002U (en) | 2011-02-25 | 2011-02-25 | Conical surface mechanical sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202171002U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128269A (en) * | 2011-02-25 | 2011-07-20 | 西华大学 | Conical surface mechanical sealing device |
| CN103375592A (en) * | 2012-04-24 | 2013-10-30 | 西华大学 | External driving type middle rotating ring mechanical seal with speed change gear |
| CN104722368A (en) * | 2013-12-20 | 2015-06-24 | 耐驰干法研磨技术有限公司 | Machine Having A Cantilever-mounted Rotor |
| CN105114626A (en) * | 2015-07-24 | 2015-12-02 | 西华大学 | Mechanical seal device for end face seal ring with controllable bellows seal |
| CN110030385A (en) * | 2017-11-13 | 2019-07-19 | 通用电气公司 | Seal assembly and its correlation technique |
| CN110513324A (en) * | 2019-08-23 | 2019-11-29 | 哈尔滨电气动力装备有限公司 | Reactor coolant pump Hydrostatic die mould mechanical seal |
| CN110792630A (en) * | 2019-11-07 | 2020-02-14 | 南京工程学院 | Air-cooled bellows dry gas sealing device |
-
2011
- 2011-02-25 CN CN2011200478392U patent/CN202171002U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128269A (en) * | 2011-02-25 | 2011-07-20 | 西华大学 | Conical surface mechanical sealing device |
| CN103375592A (en) * | 2012-04-24 | 2013-10-30 | 西华大学 | External driving type middle rotating ring mechanical seal with speed change gear |
| CN104722368A (en) * | 2013-12-20 | 2015-06-24 | 耐驰干法研磨技术有限公司 | Machine Having A Cantilever-mounted Rotor |
| EP2886211A1 (en) * | 2013-12-20 | 2015-06-24 | NETZSCH Trockenmahltechnik GmbH | Machine with cantilevered rotor |
| CN104722368B (en) * | 2013-12-20 | 2017-06-13 | 耐驰干法研磨技术有限公司 | Machinery with cantilever rotor |
| CN105114626A (en) * | 2015-07-24 | 2015-12-02 | 西华大学 | Mechanical seal device for end face seal ring with controllable bellows seal |
| CN110030385A (en) * | 2017-11-13 | 2019-07-19 | 通用电气公司 | Seal assembly and its correlation technique |
| US10788130B2 (en) | 2017-11-13 | 2020-09-29 | General Electric Company | Seal assembly |
| CN110030385B (en) * | 2017-11-13 | 2021-07-06 | 通用电气公司 | Seal assembly and related method |
| CN110513324A (en) * | 2019-08-23 | 2019-11-29 | 哈尔滨电气动力装备有限公司 | Reactor coolant pump Hydrostatic die mould mechanical seal |
| CN110792630A (en) * | 2019-11-07 | 2020-02-14 | 南京工程学院 | Air-cooled bellows dry gas sealing device |
| CN110792630B (en) * | 2019-11-07 | 2020-09-01 | 南京工程学院 | Air-cooled bellows dry gas sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120321 Termination date: 20130225 |