CN204186998U - Anti-axial vibration type mechanical seal device - Google Patents
Anti-axial vibration type mechanical seal device Download PDFInfo
- Publication number
- CN204186998U CN204186998U CN201420403203.0U CN201420403203U CN204186998U CN 204186998 U CN204186998 U CN 204186998U CN 201420403203 U CN201420403203 U CN 201420403203U CN 204186998 U CN204186998 U CN 204186998U
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- Prior art keywords
- seat
- ring
- rotating
- stationary
- axial
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Abstract
Anti-axial vibration type mechanical seal device, comprise and contact with stationary ring the sealing formed by rotating ring and pay, the Vertical direction of described rotating ring and the seal face of stationary ring is defined as axis, it is characterized in that: described rotating ring is arranged in rotating seat, described stationary ring is arranged in stationary seat, and described rotating seat and stationary seat are all cemented on pedestal; Also comprise one by elastic member and the molecular mass-spring system that shakes, the rotating seat described in described elastic member connects and oscillator, described oscillator only has axial freedom; Described stationary ring and stationary seat flexible connection, stationary ring only has axial freedom, and rotating ring is cemented on rotating seat, or described rotating ring and rotating seat flexible connection, rotating ring only has axial freedom, and stationary ring is cemented on stationary seat.
Description
Technical field
The utility model relates to a kind of shaft end seal of rotating machinery, and being specifically related to a kind ofly has the rotating machinery axle head of certain axial vibration frequency or axial vibration within the scope of certain frequency to seal.
Background technique
Mechanical seal obtains extensive use, as various rotating machineries such as compressor, pump, reactor and blower fans with significant performance advantage such as its low leakage, low power consumption, long lifetime etc. on the shaft end seal of rotating machinery.But in a lot of rotating machinery, due to the complexity of operating mode, make its rotating shaft there is violent axial vibration, thus destroy the stable operation of mechanical seal, also limit the further genralrlization of mechanical seal simultaneously.Be in particular in: contacting mechanical seal is serious at the state lower seal end wear that axial vibration is violent, and sealing life and performance decline rapidly; And for non-contact mechanical seal, violent axial vibration makes seal face gap normally to keep, even make the dynamic pressure groove rapid wearing on seal face, thus cause the inefficacy of non-contact mechanical seal.Because rotating machinery is operate under fixed rotating speed mostly, therefore the axial vibration of most of rotating machinery all has certain frequency, for this situation, a kind of anti-axial vibration type mechanical seal device of necessary research, make it effectively can control the axial vibration of rotating shaft in the vibration frequency of certain limit, thus increase the stability of sealing, extend its working life.
As far back as nineteen twenty-eight, the Ormondroyd of the U.S. and Deng Hatuo just propose the principle of dynamic vibration absorber.Its principle can be sketched as only need, with the additional little oscillator of spring on weakening object, make the natural frequency of little oscillator equal with extraneous energizing frequency.Then exciting force can only excite the intense vibration of little oscillator, and directly the object of excited target is motionless.From the viewpoint analysis of energy, because the natural frequency of energizing frequency and little oscillator is equal, make little oscillator be in resonance state, the inertial force produced and exciting force balance, and absorb whole energy of dynamic excitation, then the vibration of object is just suppressed to zero.Just can reach owing to not needing to consume the energy effect eliminating vibration, dynamic vibration absorber is very desirable weakening scheme.In practical application, dynamic vibration absorber principle is also used widely, as the anti-shake system of the crankshaft and Taipei 101 etc. of clippers, internal-combustion engine.
Utilize dynamic vibration absorber principle, a kind of simple and effective anti-axial vibration type mechanical seal device can be designed, thus eliminate or reduce rotating machinery axially vibration, improve the stability that unit sealing runs, extend its working life.
Summary of the invention
The utility model will overcome the shortcoming of the axial shock resistance difference of prior art, and provide a kind of anti-axial vibration type mechanical seal device, this mechanical seal device can eliminate the axial vibration that unit rotating shaft produces under the axial excitation being subject to certain frequency.
Anti-axial vibration type mechanical seal device, comprise and contact with stationary ring the sealing formed by rotating ring and pay, the Vertical direction of described rotating ring and the seal face of stationary ring is defined as axis, described rotating ring is arranged in rotating seat, described stationary ring is arranged in stationary seat, and described rotating seat and stationary seat are all cemented on pedestal; Also comprise one by elastic member and the molecular mass-spring system that shakes, the rotating seat described in described elastic member connects and oscillator, described oscillator only has axial freedom; Described stationary ring and stationary seat flexible connection, stationary ring only has axial freedom, and rotating ring is cemented on rotating seat, or described rotating ring and rotating seat flexible connection, rotating ring only has axial freedom, and stationary ring is cemented on stationary seat.
Further, described sealing has paid more than 2 grades.
Further, described elastic member adopts one of having structure: multiple little springs that circumference is uniform, or a big spring, or a metal bellows.
Further, the oscillator described in restriction only has the concrete structure of axial freedom to be: oscillator has the first axial pass trough, in the first axial pass trough described in the first pin be arranged on pedestal inserts; Stationary ring described in restriction only has the concrete structure of axial freedom to be: stationary ring is provided with the second axial pass trough, stationary seat is arranged the second pin, in the second axial pass trough described in the second pin inserts; Rotating ring described in restriction only has the concrete structure of axial freedom to be: rotating ring is provided with the 3rd axial pass trough, rotating seat is arranged the 3rd pin, in the 3rd axial pass trough described in the 3rd pin inserts.
Further, described elastic member is connected described rotating seat and oscillator by the first spring seat respectively with the second spring seat, and the first spring seat connects rotating seat by the first screw, and the second spring seat connects oscillator by the second screw.
Further, the seal face of described rotating ring or the seal face of stationary ring are provided with fluid dynamic pressure groove.
The utility model has following characteristics:
1. the natural frequency of mass-spring system can regulate and control according to the axial vibration frequency of unit rotating shaft.
2. mass-spring system can change its natural frequency by the oscillator changing different quality.
3. can eliminate the axial vibration of unit rotating shaft under certain energizing frequency, the axial vibration of energizing frequency under fluctuating among a small circle can be reduced simultaneously, thus make mechanical seal have higher stability.
(4) accompanying drawing explanation
Fig. 1 is that the utility model stationary ring is installed for flexible, and mass-spring system elastic element is a kind of structural representation of circumferential uniform little spring.
Fig. 2 is that the utility model rotating ring is installed for flexible, and mass-spring system elastic element is a kind of structural representation of circumferential uniform little spring.
A kind of structural representation of Fig. 3 to be the utility model mass-spring system elastic element be big spring.
A kind of structural representation of Fig. 4 to be the utility model mass-spring system elastic element be metal bellows.
Fig. 5 is a kind of structural representation that the utility model end face shallow slot is positioned on rotating ring.
Fig. 6 is a kind of structural representation that the utility model end face shallow slot is positioned on stationary ring.
(5) embodiment
Below in conjunction with accompanying drawing, the utility model is analyzed.
The utility model is specifically implemented of a great variety, arranges the different analyzing examples explanation in position of fluid dynamic pressure groove in the form that arranges of this mounting type according to dynamic and static ring, mass-spring system elastic element 7 and end face.
Embodiment 1
With reference to accompanying drawing 1:
Fig. 1 is the structural representation of the utility model embodiment 1.This anti-axial vibration type mechanical seal device comprises stationary seat 1, stationary ring 2, rotating ring 3, rotating seat 4, mass-spring system and other correlated parts, and described mass-spring system comprises the first spring seat 6, elastic element 7, screw 8, second spring seat 9, oscillator 10.
Anti-axial vibration type mechanical seal device, comprise and contact with stationary ring 2 sealing formed by rotating ring 3 and pay, the Vertical direction of described rotating ring 3 and the seal face of stationary ring 2 is defined as axis, described rotating ring 3 is arranged in rotating seat 4, described stationary ring 2 is arranged in stationary seat 1, and described rotating seat 4 and stationary seat 1 are all cemented on pedestal 12; Also comprise a mass-spring system be made up of elastic member and oscillator 10, the rotating seat 4 described in described elastic member connects and oscillator 10, described oscillator 10 only has axial freedom; Described stationary ring 2 and stationary seat 1 flexible connection, stationary ring 2 only has axial freedom, and rotating ring 3 is cemented on rotating seat 4.
Oscillator 10 described in restriction only has the concrete structure of axial freedom to be: oscillator 10 has the first axial pass trough, the first pin 13 be arranged on pedestal 12 inserts in the first described axial pass trough; Stationary ring 2 described in restriction only has the concrete structure of axial freedom to be: stationary ring 2 is provided with the second axial pass trough, stationary seat 1 is arranged the second pin 11, second pin 11 and inserts in the second described axial pass trough.
Described elastic member is connected described rotating seat 4 respectively by the first spring seat 6 and the second spring seat 9 and oscillator 10, first spring seat 6 connects rotating seat by the first screw 5, and the second spring seat 9 connects oscillator 10 by the second screw 8.
The feature of the present embodiment is: stationary ring 2 flexibility is arranged on stationary seat 1, and the elastic element 7 in mass-spring system is circumferential uniform little spring, and mechanical seal is contacting mechanical seal, and dynamic and static ring does not arrange dynamic pressure groove.
According to Fig. 1, mass-spring system is fixedly connected with rotating seat 4 by the first screw 5, oscillator 10 and the second spring seat 9 are also be connected by the second screw 8, conveniently replaced oscillator 10, and the natural frequency of mass-spring system can be regulated according to the axial vibration frequency of unit rotating shaft.
The quality of required oscillator 10 can be calculated as follows:
ω
2＝ω
n 2＝nk/(m
1+m
2+m) (1)
m＝nk/ω
2-m
1-m
2(2)
In formula 1, ω is unit axial vibration frequency, ω
nfor the natural frequency of mass-spring system, n is the number of circumferential uniform little spring in mass-spring system, and k is the rigidity of each little spring, m
1be the quality of the second screw 8, m
2be the quality of the second spring seat 9, m is the quality of oscillator 10.
Embodiment 2
With reference to accompanying drawing 2:
Fig. 2 is the structural representation of the utility model embodiment 2.Its key technology requires with embodiment 1 substantially identical, the main distinction is that the stationary ring 2 in embodiment 2 is fixedly mounted on stationary seat 1, rotating ring 3 is that flexibility to be arranged on rotating seat 3, namely described rotating ring 3 and rotating seat 4 flexible connection, rotating ring 3 only has axial freedom, and stationary ring 2 is cemented on stationary seat 1.
Rotating ring 3 described in restriction only has the concrete structure of axial freedom to be: rotating ring 3 is provided with the 3rd axial pass trough, rotating seat 4 is arranged the 3rd pin the 14, three pin 14 and inserts in the 3rd described axial pass trough.
Embodiment 3
With reference to accompanying drawing 3:
Fig. 3 is the structural representation of the utility model embodiment 3.Its sealing configuration requires with embodiment 1 substantially identical with key technology, main difference is the elastic element 7 in embodiment 3 medi-spring oscillator system is a big spring, and the calculating difference of oscillator 10 quality is exactly the global stiffness replacing circumferential uniform little spring by the rigidity of this big spring.
Embodiment 4
With reference to accompanying drawing 4:
Fig. 4 is the structural representation of the utility model embodiment 4.Its sealing configuration requires with embodiment 1 substantially identical with key technology,
The main distinction is embodiment 4 medi-spring oscillator system elastic element 7 is metal bellows, and the calculating difference of oscillator 10 quality is exactly the global stiffness replacing circumferential uniform little spring with this wavy metal pipe stiffness.
Embodiment 5
With reference to accompanying drawing 5:
Fig. 5 is the structural representation of the utility model embodiment 5.Its sealing configuration requires with embodiment 1 substantially identical with key technology,
Difference place is: on rotating ring 3 seal face, arrange fluid dynamic pressure groove.
Embodiment 6
With reference to accompanying drawing 6:
Fig. 6 is the structural representation of the utility model embodiment 6.Its sealing configuration requires with embodiment 1 substantially identical with key technology,
Its difference is: on stationary ring 2 seal face, arrange fluid dynamic pressure groove.
In the embodiment above, the mounting type of dynamic and static ring, the selecting and fluting form on seal face of mass-spring system elastic element 7 is focused on embodying.In order to clearer description key problem, single-stage sealing configuration is all only related in above embodiment, and when reality uses, various sealing total arrangement can be carried out as required, as mechanical single seal, double seals, Multilevel series seal or the combined labyrinth and carbon gland with labyrinth seal etc.
Content described in this specification embodiment is only enumerating the way of realization that model utility is conceived; protection domain of the present utility model should not be regarded as being only limitted to the concrete form that embodiment states, protection domain of the present utility model also and conceive the equivalent technologies means that can expect according to the utility model in those skilled in the art.
Claims (6)
1. anti-axial vibration type mechanical seal device, comprise and contact with stationary ring the sealing formed by rotating ring and pay, the Vertical direction of described rotating ring and the seal face of stationary ring is defined as axis, it is characterized in that: described rotating ring is arranged in rotating seat, described stationary ring is arranged in stationary seat, and described rotating seat and stationary seat are all cemented on pedestal; Also comprise one by elastic member and the molecular mass-spring system that shakes, the rotating seat described in described elastic member connects and oscillator, described oscillator only has axial freedom; Described stationary ring and stationary seat flexible connection, stationary ring only has axial freedom, and rotating ring is cemented on rotating seat, or described rotating ring and rotating seat flexible connection, rotating ring only has axial freedom, and stationary ring is cemented on stationary seat.
2. device as claimed in claim 1, is characterized in that: described sealing has paid more than 2 grades.
3. device as claimed in claim 2, is characterized in that: described elastic member adopts one of having structure: multiple little springs that circumference is uniform, or a big spring, or a metal bellows.
4. device as claimed in claim 3, is characterized in that: the oscillator described in restriction only has the concrete structure of axial freedom to be: oscillator has the first axial pass trough, in the first axial pass trough described in the first pin be arranged on pedestal inserts; Stationary ring described in restriction only has the concrete structure of axial freedom to be: stationary ring is provided with the second axial pass trough, stationary seat is arranged the second pin, in the second axial pass trough described in the second pin inserts; Rotating ring described in restriction only has the concrete structure of axial freedom to be: rotating ring is provided with the 3rd axial pass trough, rotating seat is arranged the 3rd pin, in the 3rd axial pass trough described in the 3rd pin inserts.
5. device as claimed in claim 4, it is characterized in that: described elastic member is connected described rotating seat and oscillator by the first spring seat respectively with the second spring seat, first spring seat connects rotating seat by the first screw, and the second spring seat connects oscillator by the second screw.
6. device as claimed in claim 5, is characterized in that: the seal face of described rotating ring or the seal face of stationary ring are provided with fluid dynamic pressure groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420403203.0U CN204186998U (en) | 2014-07-21 | 2014-07-21 | Anti-axial vibration type mechanical seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420403203.0U CN204186998U (en) | 2014-07-21 | 2014-07-21 | Anti-axial vibration type mechanical seal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204186998U true CN204186998U (en) | 2015-03-04 |
Family
ID=52619001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420403203.0U Withdrawn - After Issue CN204186998U (en) | 2014-07-21 | 2014-07-21 | Anti-axial vibration type mechanical seal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204186998U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179974A (en) * | 2014-07-21 | 2014-12-03 | 浙江工业大学 | Axial vibration resistance type mechanical sealing device |
| CN106763794A (en) * | 2015-11-24 | 2017-05-31 | 西安航空动力控制科技有限公司 | A kind of end face seal structure of fuel oil pump shaft tail |
-
2014
- 2014-07-21 CN CN201420403203.0U patent/CN204186998U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179974A (en) * | 2014-07-21 | 2014-12-03 | 浙江工业大学 | Axial vibration resistance type mechanical sealing device |
| CN106763794A (en) * | 2015-11-24 | 2017-05-31 | 西安航空动力控制科技有限公司 | A kind of end face seal structure of fuel oil pump shaft tail |
| CN106763794B (en) * | 2015-11-24 | 2018-12-14 | 西安航空动力控制科技有限公司 | A kind of end face seal structure of fuel oil pump shaft tail |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150304 Effective date of abandoning: 20160706 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20150304 Effective date of abandoning: 20160706 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |