CN202188125U - Spherical mechanical sealing device - Google Patents
Spherical mechanical sealing device Download PDFInfo
- Publication number
- CN202188125U CN202188125U CN2011200478208U CN201120047820U CN202188125U CN 202188125 U CN202188125 U CN 202188125U CN 2011200478208 U CN2011200478208 U CN 2011200478208U CN 201120047820 U CN201120047820 U CN 201120047820U CN 202188125 U CN202188125 U CN 202188125U
- Authority
- CN
- China
- Prior art keywords
- sphere
- sealing
- mechanical seal
- seal device
- seal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Mechanical Sealing (AREA)
Abstract
The utility model relates to a spherical mechanical sealing device which is characterized in that a sphere a is arranged on a mechanical sealing static ring (1); a sphere b is arranged on a rotation ring (2); the sphere a and the sphere b are matched to form a sealing surface; and the sealing surface can be formed by directly contacting the sphere a and the sphere b, or is formed by separating the sphere a from the sphere b with a tiny gap. The spherical mechanical sealing device has the advantages that compared with a traditional mechanical sealing way, the spherical mechanical sealing device has better non-deformability, and particularly the capacity for resisting torsion deformation of an axial section and bending deflection of a unit main shaft. The spherical mechanical sealing device is applicable to the axle end sealing of various rotating machinery.
Description
Technical field
The utility model belongs to the shaft end seal of rotating machinery, and particularly a kind of sphere mechanical seal device, this sphere 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; 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 take place along the torsional deflection of axle section when seal face, or the set main shaft at rotating ring place is when occuring bending and deformation; Can make between two seal faces the local grow of contact degree or die down; Cause local contact pressure increase between two sealing surfaces, the fretting wear aggravation then possibly cause end face fluid film pressure circumferentially to be pulsed for noncontact seal; Direct contact possibly take place in the sealing surface part, has a strong impact on to seal working life.And for above these problems, sphere mechanical seal then has stronger adaptability.
In sum; Design a kind of sphere mechanical seal device; This sphere mechanical seal device has better section torsional deflection of anti-axle and the diastrophic ability of set main shaft, thereby further widens the Applicable scope of mechanical seal, promotes the working life of unit sealing.
Summary of the invention
The purpose of the utility model provides a kind of sphere mechanical seal device, and this sphere mechanical seal device has 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 sphere mechanical seal device; Form by the stationary ring that has sphere a 1, the rotating ring 2 that has sphere b and other correlated parts; Sphere a on the stationary ring 1 and the sphere b on the rotating ring 2 are face-to-face installation; Form sealing surface, the sealing face can be that sphere a directly contacts with sphere b, also can be that sphere a separates with a micro-gap with sphere b.It is characterized in that: sealing surface is spherical shape.
The utility model mainly adopts following technical measures to realize:
The sphere a of said sphere mechanical seal device and sphere b both can be that convex surface also can be a concave surface, but when sphere a was convex surface (concave surface), sphere b was necessary for concave surface (convex surface).
The convex surface radius of said sphere mechanical seal device is less than or equal to concave.
The sphere a of said sphere mechanical seal device and the radius of sphere b can equate, also can be unequal.
Among the sphere a and sphere b of said sphere mechanical seal device, can or on two spheres, fluid dynamic pressure groove be set simultaneously at one, or two spheres are not provided with fluid dynamic pressure groove.
Said sphere mechanical seal device, the fluid dynamic pressure groove that is provided with on its sphere can be that deep trouth also can be a shallow slot, and its groove depth scope is between 0.01 micron～3 millimeters.
Said sphere 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 sphere mechanical seal device in multi-stage sealed layout, can be the combination seal that sphere mechanical seal forms with other form motive sealing.
The utlity model has following characteristics:
1) seal face is a sphere;
2) 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 sphere mechanical seal device.
Fig. 2 is a spherical sealing surface structure schematic representation on the stationary ring in the utility model sphere contact-type mechanical seal device.
Fig. 3 is a spherical sealing surface structure schematic representation on the rotating ring in the utility model sphere 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 sphere mechanical seal device.
Fig. 5 is in the utility model sphere 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 the spherical sealing surface of a rotating ring upper-end surface shallow slot structure schematic representation in the utility model sphere non-contact mechanical seal device.
The symbol implication is following in the accompanying drawing:
SR
1---protruding sealing surface spherical radius.
SR
2---recessed sealing surface spherical radius.
R
3---the axle sleeve external diameter.
R
4---sealing surface shallow slot internal diameter.
R
5---sealing surface shallow slot external diameter.
A---sphere on the stationary ring.
B---sphere on the rotating ring.
C---sealing surface shallow slot structure.
ω
1---the rotating ring angular velocity of rotation.
h
0---contactless sphere mechanical seal end surface axial clearance.
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 sphere 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 sphere mechanical seal device comprises the stationary ring 1 that has sphere a, the rotating ring 2 that has sphere 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: sphere a and sphere b) directly contact.
According to Fig. 1, Fig. 2, Fig. 3, the sphere a on the stationary ring 1 is a concave surface, and its radius is SR
1, the sphere b on the rotating ring 2 is a convex surface, its radius is SR
2, two spherical radius relation is: SR
1>=SR
2 Stationary ring 1 is face-to-face coaxial line with rotating ring 2 to be installed, and forms spherical sealing surface, and the sealing face is that sphere a directly contacts with sphere 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 spherical sealing surface 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 sphere mechanical seal device comprises the stationary ring 1 that has sphere a, the rotating ring 2 that has sphere 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: sphere a and sphere b) separate with a micro-gap h0.
According to Fig. 4, the sphere a on the stationary ring 1 is a concave surface, and its radius is SR
1, the sphere b on the rotating ring 2 is a convex surface, its radius is SR
2, stationary ring 1 is face-to-face coaxial line with rotating ring 2 to be installed, and with a micro-gap h
0Separate, form spherical 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 spherical 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 sphere mechanical seal device comprises the stationary ring 1 that has sphere a, the rotating ring 2 that has sphere 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 the spherical sealing surface b of rotating ring, offer fluid dynamic pressure groove c.
According to Fig. 5, the sphere a on the stationary ring 1 is a concave surface, and its radius is SR
1, the sphere b on the rotating ring 2 is a convex surface, its radius is SR
2, two spherical radius relation is: SR
1＞SR
2 Stationary ring 1 is face-to-face coaxial line with rotating ring 2 to be installed, and two sealing surfaces are under the effect of shallow slot c hydrodynamic pressure, with a micro-gap h
0Separate, form spherical 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 spherical noncontact seal face is exactly the leakage flow that stops medium.
In above embodiment, emphasis has embodied the sphere 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 (7)
1. sphere mechanical seal device; Form by the stationary ring that has sphere a (1), the rotating ring (2) and other correlated parts that have a sphere b; Sphere b on sphere 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 sphere a directly contacts with sphere b; Also can be that sphere a separates with a micro-gap with sphere b, it is characterized in that: sealing surface be spherical shape.
2. sphere mechanical seal device according to claim 1 is characterized in that: sphere a and sphere b both can be that convex surface also can be a concave surface, but when sphere a was convex surface, sphere b was necessary for concave surface, and when sphere a was concave surface, sphere b was necessary for convex surface.
3. sphere mechanical seal device according to claim 1 and 2 is characterized in that: recessed sealing surface spherical radius SR1 can equate with protruding sealing surface spherical radius SR2, also can be unequal.
4. sphere mechanical seal device according to claim 1 is characterized in that: among sphere a and the sphere b, can or on two spheres, fluid dynamic pressure groove be set simultaneously at one, or two spheres are not provided with fluid dynamic pressure groove.
5. sphere mechanical seal device according to claim 4 is characterized in that: the fluid dynamic pressure groove that is provided with on the sphere can be that deep trouth also can be a shallow slot, and its groove depth scope is between 0.01 micron～3 millimeters.
6. sphere 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.
7. sphere mechanical seal device according to claim 6 is characterized in that: during two groups of above sealing surfaces are arranged, can be the sphere mechanical seal combination seal that sealing forms with conventional machinery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200478208U CN202188125U (en) | 2011-02-25 | 2011-02-25 | Spherical mechanical sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200478208U CN202188125U (en) | 2011-02-25 | 2011-02-25 | Spherical mechanical sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202188125U true CN202188125U (en) | 2012-04-11 |
Family
ID=45919577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200478208U Expired - Fee Related CN202188125U (en) | 2011-02-25 | 2011-02-25 | Spherical mechanical sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202188125U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102174963A (en) * | 2011-02-25 | 2011-09-07 | 西华大学 | Spherical 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 |
| CN111765062A (en) * | 2020-06-10 | 2020-10-13 | 中国航发北京航科发动机控制系统科技有限公司 | High-low pressure combination formula fuel pump structure |
-
2011
- 2011-02-25 CN CN2011200478208U patent/CN202188125U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102174963A (en) * | 2011-02-25 | 2011-09-07 | 西华大学 | Spherical 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 |
| CN111765062A (en) * | 2020-06-10 | 2020-10-13 | 中国航发北京航科发动机控制系统科技有限公司 | High-low pressure combination formula fuel pump structure |
| CN111765062B (en) * | 2020-06-10 | 2022-10-14 | 中国航发北京航科发动机控制系统科技有限公司 | High-low pressure combination formula fuel pump structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202171002U (en) | Conical surface mechanical sealing device | |
| CN102128269A (en) | Conical surface mechanical sealing device | |
| CN201771838U (en) | Sealing structure of turbine pump | |
| CN201093013Y (en) | Internal groove self-lubricating movable static pressure coupled air bearing | |
| CN105953000A (en) | Medium-pressure high-speed rotating connector | |
| CN111828100A (en) | Serial dry gas sealing device for industrial steam turbine | |
| CN202188125U (en) | Spherical mechanical sealing device | |
| CN105526442A (en) | High-pressure-resistant self-sealing rotary compensator | |
| CN102174963A (en) | Spherical mechanical sealing device | |
| CN201173188Y (en) | Double end-face mechanical sealing structure for high speed screw compressor | |
| CN100370147C (en) | Shaft seal device used for ultra low specific rotating speed centrifugal fan | |
| CN202251058U (en) | Oil film double mechanical sealing device for compressors | |
| CN204127321U (en) | A kind of mechanical seal device | |
| CN111810253A (en) | Double-end-face dry air sealing device for industrial steam turbine | |
| CN201902561U (en) | Mechanical seal ring | |
| CN100458177C (en) | Built-in type parking sealing arrangement | |
| CN111810642A (en) | Dynamic sealing structure suitable for low-pressure small-motion-amplitude working condition | |
| CN103629357A (en) | Sealing mechanism for vane type rotary valve | |
| CN105179157A (en) | Outer-curve radial plunger hydraulic motor | |
| CN213899378U (en) | Mechanical sealing device for high-temperature hot water pump | |
| CN111810251A (en) | Split carbon ring type double-end-face dry air sealing device for industrial steam turbine | |
| CN204610916U (en) | A kind of Novel high-temperature high-pressure parallel double-flashboard gate valve | |
| CN111810252A (en) | Split carbon ring type serial dry gas sealing device for industrial steam turbine | |
| CN112377453A (en) | Mechanical sealing device for high-temperature hot water pump | |
| CN203532749U (en) | High-speed and high-pressure mechanical sealing device |
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: 20120411 Termination date: 20130225 |