CN103352984B - A kind of rubber bellows mechanical seal structure of pump shaft - Google Patents
A kind of rubber bellows mechanical seal structure of pump shaft Download PDFInfo
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- CN103352984B CN103352984B CN201310312680.6A CN201310312680A CN103352984B CN 103352984 B CN103352984 B CN 103352984B CN 201310312680 A CN201310312680 A CN 201310312680A CN 103352984 B CN103352984 B CN 103352984B
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- bellows
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- rotating ring
- drive sleeve
- pump shaft
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Abstract
The present invention relates to a kind of rubber bellows mechanical seal structure of pump shaft, be arranged between pump case and pump shaft, described sealing configuration comprises stationary ring, rotating ring, bellows, spring, spring seat and snap ring, gear pad, one end of bellows is installed in the outer end of rotating ring with axial end, the other end of this bellows is packed on pump shaft; Rotating ring is coaxially fixedly mounted with a drive sleeve, coaxial mounting spring between spring seat and the inner end riser of drive sleeve, in the guide groove of drive sleeve, all guiding installs the projection of snap ring, is coaxially fixed with gear pad at bellows near rotating ring position, and wave mode made by the bellows between gear pad and snap ring.This sealing configuration changes the structure of bellows, and add the length of drive sleeve, when working depth, bellows has been made wave mode, do not need spring force to impel it to be formed, spring force is acted on rotating ring completely, rotating ring and stationary ring are firmly fitted, even if also seal failure can not be made there is the operating mode of play at pump shaft under, extend the working life of sealing.
Description
Technical field
The invention belongs to mechanical seal field, relate to the mechanical seal of pump shaft, especially a kind of rubber bellows mechanical seal structure of pump shaft.
Background technique
For a long time, rubber bellows mechanical seal is widely used because of its compact structure, easy for installation, cheap etc., is especially applied in the submersible electric pump serial equipments such as petroleum production.Submersible electric pump often under dive to ground surface hundreds of rice dark, once leaking appears in sealing, change that they are loaded down with trivial details especially, waste time and energy, and expense is expensive especially, therefore this just requires to seal and has good safe application performance.And in reality, have a lot of sealing very short time that often works to leak, do not reach desirable working life far away.In this its and the quality of mechanical seal, the error of installation have certain relation, but the more important thing is the various unfavorable conditions that the structural design of sealing produces when can't meet equipment operation, such as axle altered, axle pendulum etc.In the process run, certain axial float inevitably occurs as equipment such as submersible electric pumps, this can bring certain difficulty to the structural design of mechanical seal, this just require used mechanical seal to overcome axle is altered, axle pendulum etc. is harsh operating conditions.
By retrieval, find following several sections of patent publication us relevant to patent application of the present invention:
1, rubber bellows mechanical seal (CN201827377U), disclose a kind of rubber bellows mechanical seal for mechanical seal field, comprise rotating ring, upper spring seat, lower spring cup, spring and the rubber corrugated pipe with rotating shaft interference fit, the endoporus interference fit of rotating ring periphery and rubber corrugated pipe left end, upper spring seat to be enclosed within rubber corrugated pipe and to withstand on the step surface of rubber corrugated pipe left end, lower spring cup to be enclosed within rubber corrugated pipe and to withstand on the step surface of rubber corrugated pipe right-hand member, upper spring seat and lower spring cup and rubber corrugated pipe interference fit, spring one end withstands on upper spring seat, the other end withstands on lower spring cup, upper spring seat is provided with the first hasp towards spring, lower spring cup is provided with the second hasp towards spring, spring left and right both ends of the surface are respectively equipped with the first groove and the second groove, first hasp inserts in the first groove, second hasp inserts in the second groove.The utility model rubber bellows mechanical seal can not produce the phenomenon of skidding between spring and spring seat.
2, mechanical seal device for rubber bellows (CN201190795), disclose a kind of mechanical seal device for rubber bellows, the static components comprising moving ring assembly and be made up of stationary ring (3) and rubber cup (1), static components is fixed on cavity (2), rotating ring (4) outer wall and rubber corrugated pipe (8) one end interference fit; Metal shell (5) is enclosed within one end of rubber corrugated pipe (8), and rubber corrugated pipe (8) one end is interference fitted on axle (9); Spring seat (7) is enclosed within one end of rubber corrugated pipe (8), spring (6) one end is against on metal shell, the other end of spring (6) is against on spring seat (7), and rotating ring (4) keeps fitting in the effect of spring (6) and stationary ring (3); Also circumference is spacing mutually for described metal shell (5) and spring seat (7) sliding connection.This mechanical seal device for rubber bellows can carry high pulling torque, effectively prevents rubber corrugated pipe from tearing with camber of spring and then guaranteeing sealing.
By contrast, there are the different of essence in patent application of the present invention and above-mentioned patent publication us.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, a kind of rubber bellows mechanical seal structure of pump shaft is provided, sealing structure is by the structural change of rubber corrugated pipe, increase the compression range of mechanical seal, and make it alter at axle, still can normally work under the bad condition such as axle pendulum.
The present invention solves its technical problem and is achieved through the following technical solutions:
A kind of rubber bellows mechanical seal structure of pump shaft, be arranged between pump case and pump shaft, described sealing configuration comprises stationary ring, rotating ring, bellows, spring, spring seat and snap ring, gear pad, stationary ring is packed on the pump shaft in pump case by seal ring, inner end and the stationary ring of rotating ring are that end face seal is connected, one end of bellows is installed in the outer end of rotating ring with axial end, the other end of this bellows is packed on pump shaft; Rotating ring is coaxially fixedly mounted with a drive sleeve, riser is made in one end of rotating ring in the inner end of this drive sleeve namely, the other end is uniform is shaped with guide groove, the outboard end interval mounting spring seat of this guide groove, coaxial mounting spring between spring seat and the inner end riser of drive sleeve, in the guide groove of drive sleeve, all guiding installs the projection of snap ring, is coaxially fixed with gear pad at bellows near rotating ring position, and wave mode made by the bellows between gear pad and snap ring.
And the wave mode of described bellows is when extruding the highest and minimum, and have gap between spring seat and drive sleeve, the projection of snap ring and the guide groove root of drive sleeve have gap.
Advantage of the present invention and beneficial effect are:
1, this sealing configuration changes the structure of bellows, and the corresponding length adding drive sleeve, when working depth, bellows has been made wave mode, do not need spring force to impel it to be formed, spring force is acted on rotating ring completely, rotating ring and stationary ring are firmly fit together, even if also seal failure can not be made there is the operating mode of play at pump shaft under, extend the working life of sealing.
2, this sealing configuration is compared with rubber bellows mechanical seal in the past, its maximum feature is increased the compression range of rubber corrugated pipe, the ripple of its bellows under the state of working depth is just defined, and when assembling, spring seat promotion bellows pushes along pump shaft, brings conveniently to assembling.
Accompanying drawing explanation
Fig. 1 is structure cross-sectional schematic of the present invention.
Embodiment
Below in conjunction with accompanying drawing, by specific embodiment, the invention will be further described, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
A kind of rubber bellows mechanical seal structure of pump shaft, be arranged between pump case 1 and pump shaft 12, as shown in Figure 1, sealing structure comprises stationary ring 8, rotating ring 9, bellows 3, spring 6, spring seat 2 and snap ring 4, gear pad 11, stationary ring is packed on the pump shaft in pump case by seal ring 7, inner end and the stationary ring of rotating ring are that end face seal is connected, and one end of bellows is installed in the outer end of rotating ring with axial end, the other end of this bellows is packed on pump shaft; Rotating ring is coaxially fixedly mounted with a drive sleeve 10, riser is made in one end of rotating ring in the inner end of this drive sleeve namely, the other end is uniform is shaped with guide groove, the outboard end interval mounting spring seat of this guide groove, coaxial mounting spring between spring seat and the inner end riser of drive sleeve, in the guide groove of drive sleeve, all guiding installs the projection of snap ring, gear pad is coaxially fixed with near rotating ring position at bellows, make wave mode 5 at gear pad with the bellows between snap ring, made bellows wave mode compensates the play of pump shaft and the seal leakage problem between the rotating ring stationary ring that causes.
The wave mode of bellows, when extruding the highest and minimum, should ensure the gap between spring seat and drive sleeve, and the gap of the guide groove root of the projection of snap ring and drive sleeve.
Working principle of the present invention is:
When sealing is in working depth time, the bottom of spring seat and rubber corrugated pipe is adjacent to, and now the middle formation one of bellows is wavy, and the projection of snap ring is directed between the guide groove of drive sleeve, do not contact with the guide groove root of drive sleeve, between have an intersegmental gap.In pump operation process, when pump shaft generation axle alters phenomenon, can't impact machine envelope.When the moment of play occurs left pump shaft, bellows drives snap ring and spring seat to be subjected to displacement left, and now the wave mode of bellows is not recovered completely, and rotating ring is also by bellows power to the right, and the end face between rotating ring and stationary ring can also fit together.When the moment of play occurs to the right pump shaft, bellows drives snap ring and spring seat to be subjected to displacement to the right, now leave gap between spring seat and drive sleeve and do not contact, the projection of snap ring has gap also not contact with the guide groove root of drive sleeve, and now bellows ripple also and tight, bellows can also play buffer function, and therefore rotating ring can't be subject to the operation that the impact force mechanical seal of moment still can be safe and reliable because play to the right occurs pump shaft.
Because spring seat during working depth contacts with bottom bellows during assembling, so only need firmly spring seat and bellows entirety be pushed along axle during assembling, bring conveniently to assembling.
Through on-the-spot experimental observation, the utilization of this sealing configuration on submersible electric pump reaches desirable effect.
Claims (1)
1. the rubber bellows mechanical seal structure of a pump shaft, be arranged between pump case and pump shaft, it is characterized in that: described sealing configuration comprises stationary ring, rotating ring, bellows, spring, spring seat and snap ring, gear pad, stationary ring is packed on the pump shaft in pump case by seal ring, inner end and the stationary ring of rotating ring are that end face seal is connected, one end of bellows is installed in the outer end of rotating ring with axial end, the other end of this bellows is packed on pump shaft; Rotating ring is coaxially fixedly mounted with a drive sleeve, riser is made in one end of rotating ring in the inner end of this drive sleeve namely, the other end is uniform is shaped with guide groove, the outboard end interval mounting spring seat of this guide groove, coaxial mounting spring between spring seat and the inner end riser of drive sleeve, in the guide groove of drive sleeve, all guiding installs the projection of snap ring, is coaxially fixed with gear pad at bellows near rotating ring position, and wave mode made by the bellows between gear pad and snap ring;
The wave mode of described bellows is when extruding the highest and minimum, and have gap between spring seat and drive sleeve, the projection of snap ring and the guide groove root of drive sleeve have gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310312680.6A CN103352984B (en) | 2013-07-23 | 2013-07-23 | A kind of rubber bellows mechanical seal structure of pump shaft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310312680.6A CN103352984B (en) | 2013-07-23 | 2013-07-23 | A kind of rubber bellows mechanical seal structure of pump shaft |
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| Publication Number | Publication Date |
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| CN103352984A CN103352984A (en) | 2013-10-16 |
| CN103352984B true CN103352984B (en) | 2016-01-27 |
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| CN201310312680.6A Active CN103352984B (en) | 2013-07-23 | 2013-07-23 | A kind of rubber bellows mechanical seal structure of pump shaft |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654653A (en) * | 2017-09-15 | 2018-02-02 | 浙江鲁溪密封件有限公司 | A kind of mechanically-sealing apparatus |
| CN108278368A (en) * | 2018-03-20 | 2018-07-13 | 浙江天鹰机械密封件有限公司 | Mechanical seal |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200949534Y (en) * | 2006-08-05 | 2007-09-19 | 常熟理工学院 | Corrosion-resistant pump |
| CN201196267Y (en) * | 2008-05-20 | 2009-02-18 | 宁波东联密封件有限公司 | Mechanical seal |
| CN201277195Y (en) * | 2008-09-02 | 2009-07-22 | 徐华岳 | Sealing member of oil-submersible electric pump |
| CN201368204Y (en) * | 2009-03-24 | 2009-12-23 | 宁波东联密封件有限公司 | Corrugated tube mechanical seal |
| CN201368057Y (en) * | 2009-03-24 | 2009-12-23 | 宁波东联密封件有限公司 | Mechanical sealing device |
| CN201396435Y (en) * | 2009-03-24 | 2010-02-03 | 宁波东联密封件有限公司 | Mechanical sealing device |
| CN101985947A (en) * | 2010-10-26 | 2011-03-16 | 蒋敏 | Containerization-type mechanical seal |
| CN203395189U (en) * | 2013-07-23 | 2014-01-15 | 天津市联强机械密封技术有限公司 | Mechanical seal structure of rubber bellows of pump shaft |
-
2013
- 2013-07-23 CN CN201310312680.6A patent/CN103352984B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200949534Y (en) * | 2006-08-05 | 2007-09-19 | 常熟理工学院 | Corrosion-resistant pump |
| CN201196267Y (en) * | 2008-05-20 | 2009-02-18 | 宁波东联密封件有限公司 | Mechanical seal |
| CN201277195Y (en) * | 2008-09-02 | 2009-07-22 | 徐华岳 | Sealing member of oil-submersible electric pump |
| CN201368204Y (en) * | 2009-03-24 | 2009-12-23 | 宁波东联密封件有限公司 | Corrugated tube mechanical seal |
| CN201368057Y (en) * | 2009-03-24 | 2009-12-23 | 宁波东联密封件有限公司 | Mechanical sealing device |
| CN201396435Y (en) * | 2009-03-24 | 2010-02-03 | 宁波东联密封件有限公司 | Mechanical sealing device |
| CN101985947A (en) * | 2010-10-26 | 2011-03-16 | 蒋敏 | Containerization-type mechanical seal |
| CN203395189U (en) * | 2013-07-23 | 2014-01-15 | 天津市联强机械密封技术有限公司 | Mechanical seal structure of rubber bellows of pump shaft |
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| CN103352984A (en) | 2013-10-16 |
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