CN203394735U - Mechanical seal structure special for bidirectional balanced type chemical pump - Google Patents
Mechanical seal structure special for bidirectional balanced type chemical pump Download PDFInfo
- Publication number
- CN203394735U CN203394735U CN201320442534.0U CN201320442534U CN203394735U CN 203394735 U CN203394735 U CN 203394735U CN 201320442534 U CN201320442534 U CN 201320442534U CN 203394735 U CN203394735 U CN 203394735U
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- Prior art keywords
- ring
- main
- adpting flange
- axle sleeve
- seal structure
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- Expired - Fee Related
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Abstract
The utility model relates to a mechanical seal structure special for a bidirectional balanced type chemical pump. The mechanical seal structure is mounted on a shaft sleeve between a connection flange and a pump shaft, a main dynamic ring and a main static ring are fixedly mounted at one end of the shaft sleeve, and end faces of the main dynamic ring and the main static ring are connected to form a main seal. An assistant dynamic ring and an assistant static ring are mounted in the connection flange of the other end of the shaft sleeve by using a locking device, end faces of the assistant static ring and the assistant dynamic ring are connected to form an assistant seal, a main spring embedded in the connection flange is mounted on an inner side of the connection flange of the main static ring in a top-mounting manner, the assistant static ring is mounted in a sliding seat of the inner side of the connection flange, and an assistant spring is mounted in the sliding seat in a top-mounting manner. The seal structure is particle-resistant, can bear pressure bidirectionally, and is high in reliability, no matter pressure of medium is high or the pressure of external sealing liquid is high, medium acting forces borne by the dynamic ring and the static ring are both close to a pressure cover, and the static ring can not be pushed out of the pressure cover. Meanwhile, when sealing is under an inner pressure and an outer pressure, balance diameter of the static ring changes so as to automatically meet the requirements of sealing on balance diameter.
Description
Technical field
The utility model belongs to mechanical seal field, relates to the mechanical seal of chemical pump, and especially a kind of two to balance type chemical pump mechanical seal structure.
Background technique
In recent years, along with the raising of environmental quality requirement, the requirement of the sealing effect of pump is also being improved constantly.Pump seal inflammable, explosive, poisonous for carrying, polluted media, the most general solution is to adopt double mechanical seal at present, its structure is that left side is pump fed sheet of a media, injects high pressure sealing liquid carry out medium in shutoff pump by IN interface, and medium in pump is not leaked in atmosphere.But in practice, have two problems often to cause seal failure: the one, the step-down due to seal leakage, or medium is because local temperature changes or the instantaneous supercharging of topochemical reaction, when sealing liquid pressure lower than pump in during pressure medium, because inner seal can not reverse pressure-bearing, so inner seal lost efficacy; Another problem is while containing granule materials in medium, and particle packing, at end face or the seal ring of moving ring place of inner seal, causes that inner seal lost efficacy.Therefore can not be guaranteed this sealing life, and often occur the problem of catastrophic failure.
Model utility content
The purpose of this utility model is to overcome the deficiencies in the prior art part, provides a kind of two to balance type chemical pump mechanical seal structure, can particle-resistant, two to pressure-bearing, and sealing is reliable.
The utility model solves its technical problem and is achieved through the following technical solutions:
To a balance type chemical pump mechanical seal structure, be arranged on the axle sleeve between adpting flange and pump shaft, in one end of axle sleeve, be fixed with initiatively ring, main stationary ring, initiatively ring connects and composes primary seal with main stationary ring end face; The other end at axle sleeve is provided with secondary rotating ring and secondary stationary ring by employing locking device in adpting flange, secondary stationary ring is connected with secondary rotating ring end face and forms pair and seals, it is characterized in that: main stationary ring fills a main spring being inlaid in adpting flange on the top, inboard of adpting flange, secondary stationary ring is arranged in an inboard sliding seat of adpting flange, and in this sliding seat, top fills an auxiliary spring.
And described locking device consists of locking ring, positioning screwn and positioning plate, locking ring is locked at secondary rotating ring on axle sleeve, and adopts positioning plate by locking ring and adpting flange location, and recycling positioning screwn carries out axially locating.
And, between adpting flange and axle sleeve, be also provided with a stop pin.
And, sleeve sealing circle is installed between axle sleeve and pump shaft, initiatively between ring and axle sleeve, seal ring of moving ring is being installed, stationary ring seal ring is installed between main stationary ring and adpting flange, between sliding seat and adpting flange, there is sliding ring, between secondary rotating ring and axle sleeve, secondary seal ring is installed.
And described active ring, secondary rotating ring and main stationary ring all adopt whole SiC ring; Described secondary stationary ring adopts insert to soak antimony graphite.
Advantage of the present utility model and beneficial effect are:
1, this sealing configuration energy particle-resistant, can two to pressure-bearing, there is high reliability, no matter pressure medium is high or outside sealing liquid pressure is high, the medium active force that dynamic and static ring bears is pressured lid side all, stationary ring can not be pushed out gland; Meanwhile, when sealing is subject to interior pressure and external pressure, stationary ring balance diameter can change, automatically to adapt to the requirement of sealing to balance diameter.
2, the dynamic and static ring of this sealing configuration all adopts whole SiC ring, distortion and the high temperature decylization problem of having avoided insert to bring; Spring is built-in, has overcome the problem of Particle Blocking spring; Integral body is Double End unit loading type, location is installed conveniently, the secondary seal of the axle sleeve that do not wear and tear.
3, this sealing configuration is for the inner seal of Double End, solve inflammable, explosive, the motive sealing problem of poisonous medium, has allowed a small amount of particle in medium, sealing reliability is high, long service life, requires to reduce to auxiliary system, reduces plant maintenance, improved the Security of equipment, to day by day threatening the mankind's environmental issue to have important realistic meaning.
Accompanying drawing explanation
Fig. 1 is structure cross-sectional schematic of the present utility model;
Fig. 2 is balance diameter sign picture of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, by specific embodiment, the utility model is described in further detail, and following examples are descriptive, are not determinate, can not limit protection domain of the present utility model with this.
To a balance type chemical pump mechanical seal structure, be arranged on the axle sleeve 17 between adpting flange 19 and pump shaft 15, in one end of axle sleeve, be fixed with and initiatively encircle 3, main stationary ring 4, initiatively ring connects and composes primary seal with main stationary ring end face; At the other end of axle sleeve, by adopting locking device that secondary rotating ring 12 and secondary stationary ring 10 are installed in adpting flange, secondary stationary ring is connected with secondary rotating ring end face and forms pair and seals; Main stationary ring fills a main spring 6 being inlaid in adpting flange on the top, inboard of adpting flange, and secondary stationary ring is arranged in an inboard sliding seat 8 of adpting flange, and in this sliding seat, top fills an auxiliary spring 9.
Described active ring, secondary rotating ring, main stationary ring all adopt whole SiC ring; Secondary stationary ring adopts insert to soak antimony graphite.
Described locking device consists of locking ring 14, positioning screwn 13 and positioning plate 11, and locking ring is locked at secondary rotating ring on axle sleeve, and adopts positioning plate by locking ring and adpting flange location, and recycling positioning screwn carries out axially locating.
Between adpting flange and axle sleeve, be also provided with a stop pin 16.
Sleeve sealing circle 1 is installed between axle sleeve and pump shaft, initiatively between ring and axle sleeve, seal ring of moving ring 2 is being installed, stationary ring seal ring 5 is installed between main stationary ring and adpting flange, between sliding seat and adpting flange, there is sliding ring 7, secondary seal ring 18 is installed between secondary rotating ring and axle sleeve, and above-mentioned seal ring forms auxiliary seal.
Working principle of the present utility model is:
When inner side (sealing left side) pressure medium is high, push stationary ring O shape circle to right side, stationary ring balance diameter is that D1(is shown in Fig. 2); When outside (sealing right side) pressure is high, through stationary ring O shape circle, push left side to, stationary ring balance diameter is D2.
Its formula is: when pressure medium is high, and machine envelope balance coefficient (D
3 2-D
1 2)/(D
3 2-D
4 2)=75%;
When sealing liquid pressure is high, machine envelope balance coefficient (D
2 2-D
4 2)/(D
3 2-D
4 2)=75%.
Above-mentioned typical structure, the high saturated vapour hydraulic fluid of the liquefied hydrocarbon of take (simple operating mode) is example, can, directly as two-shipper envelope with no pressure, adopt the auxiliary rinse-system of APIplan11+52, sealing liquid pressure is lower than pressure medium, and media fluid provides lubricating end surface for two to balanced seal; For poisonous, inflammable, explosive, be difficult for the low saturated vapour hydraulic fluid of gasification, or contain a small amount of particle-liquid, the easy easy crystallization fluids of polymerization etc., can be used as pressure double-sealing; Adopt the auxiliary rinse-system of APIplan11+53, sealing liquid pressure is higher than pressure medium, and normal condition sealing liquid provides lubricating end surface for two to balanced seal.When sealing liquid pressure during lower than pressure medium, now becomes APIplan11+52 scheme because of cause specific, medium fluid flows into end face and lubricates, and has a small amount of dielectric leakage to enter sealing liquid, but seal, still can work.For not making medium enter sealing liquid, pollute sealing liquid, one has ready conditions, and just should improve sealing liquid pressure, and auxiliary system is reverted to APIplan11+53.
Claims (5)
1. two to a balance type chemical pump mechanical seal structure, is arranged on the axle sleeve between adpting flange and pump shaft, is fixed with initiatively ring, main stationary ring in one end of axle sleeve, and initiatively ring connects and composes primary seal with main stationary ring end face; The other end at axle sleeve is provided with secondary rotating ring and secondary stationary ring by employing locking device in adpting flange, secondary stationary ring is connected with secondary rotating ring end face and forms pair and seals, it is characterized in that: main stationary ring fills a main spring being inlaid in adpting flange on the top, inboard of adpting flange, secondary stationary ring is arranged in an inboard sliding seat of adpting flange, and in this sliding seat, top fills an auxiliary spring.
2. according to claim 1 two to balance type chemical pump mechanical seal structure, it is characterized in that: described locking device consists of locking ring, positioning screwn and positioning plate, locking ring is locked at secondary rotating ring on axle sleeve, and adopting positioning plate by locking ring and adpting flange location, recycling positioning screwn carries out axially locating.
3. according to claim 1 two to balance type chemical pump mechanical seal structure, it is characterized in that: between adpting flange and axle sleeve, be also provided with a stop pin.
4. according to claim 1 two to balance type chemical pump mechanical seal structure, it is characterized in that: sleeve sealing circle is installed between axle sleeve and pump shaft, initiatively between ring and axle sleeve, seal ring of moving ring is being installed, stationary ring seal ring is installed between main stationary ring and adpting flange, between sliding seat and adpting flange, there is sliding ring, between secondary rotating ring and axle sleeve, secondary seal ring is installed.
5. according to claim 1 two to balance type chemical pump mechanical seal structure, it is characterized in that: described active ring, secondary rotating ring and main stationary ring all adopt whole SiC ring; Described secondary stationary ring adopts insert to soak antimony graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320442534.0U CN203394735U (en) | 2013-07-23 | 2013-07-23 | Mechanical seal structure special for bidirectional balanced type chemical pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320442534.0U CN203394735U (en) | 2013-07-23 | 2013-07-23 | Mechanical seal structure special for bidirectional balanced type chemical pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203394735U true CN203394735U (en) | 2014-01-15 |
Family
ID=49906270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320442534.0U Expired - Fee Related CN203394735U (en) | 2013-07-23 | 2013-07-23 | Mechanical seal structure special for bidirectional balanced type chemical pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203394735U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775273A (en) * | 2014-02-28 | 2014-05-07 | 南京贝奇尔机械有限公司 | Sealing device of main shaft of RPT (reversible pump turbine) type water turbine |
| CN107542933A (en) * | 2016-06-23 | 2018-01-05 | 上海易勒机电设备有限公司 | A kind of integrated mechanical sealing device |
| CN109185221A (en) * | 2018-10-23 | 2019-01-11 | 丹东克隆集团有限责任公司 | Become balance diameter, spring full protection type double mechanical seal |
| CN110440001A (en) * | 2019-08-29 | 2019-11-12 | 浙江工业大学 | A kind of stationary ring replaceable mechanically-sealing apparatus |
| CN115654143A (en) * | 2022-12-28 | 2023-01-31 | 东营海森密封技术有限责任公司 | Self-balancing micro-contact sealing structure |
-
2013
- 2013-07-23 CN CN201320442534.0U patent/CN203394735U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775273A (en) * | 2014-02-28 | 2014-05-07 | 南京贝奇尔机械有限公司 | Sealing device of main shaft of RPT (reversible pump turbine) type water turbine |
| CN103775273B (en) * | 2014-02-28 | 2016-04-27 | 南京贝奇尔机械有限公司 | A kind of RPT type hydraulic turbine main shaft sealing device |
| CN107542933A (en) * | 2016-06-23 | 2018-01-05 | 上海易勒机电设备有限公司 | A kind of integrated mechanical sealing device |
| CN109185221A (en) * | 2018-10-23 | 2019-01-11 | 丹东克隆集团有限责任公司 | Become balance diameter, spring full protection type double mechanical seal |
| CN109185221B (en) * | 2018-10-23 | 2023-10-20 | 丹东克隆集团有限责任公司 | Double-end-face mechanical seal with balanced diameter and full protection of spring |
| CN110440001A (en) * | 2019-08-29 | 2019-11-12 | 浙江工业大学 | A kind of stationary ring replaceable mechanically-sealing apparatus |
| CN115654143A (en) * | 2022-12-28 | 2023-01-31 | 东营海森密封技术有限责任公司 | Self-balancing micro-contact sealing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20170723 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |