CN105090518B - Bellows-type dry gas sealing device and encapsulating method - Google Patents
Bellows-type dry gas sealing device and encapsulating method Download PDFInfo
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- CN105090518B CN105090518B CN201510580854.6A CN201510580854A CN105090518B CN 105090518 B CN105090518 B CN 105090518B CN 201510580854 A CN201510580854 A CN 201510580854A CN 105090518 B CN105090518 B CN 105090518B
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- bellows
- axle
- seat
- dry gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/36—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member connected by a diaphragm or bellow to the other member
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Sealing (AREA)
- Joints Allowing Movement (AREA)
- Diaphragms And Bellows (AREA)
Abstract
The invention discloses a kind of bellows-type dry gas sealing device and encapsulating method, including static element, revolving part, axle, inner corrugated pipe, outward corrugated tube and shell；The static element is fixed together by locating piece with shell；The revolving part is fixed on axle by locknut, and follows the rotation of axle and rotate；Interior outward corrugated tube can play a part of spring, but function and be played a part of long-range and spring, realize being worked under various environment using bellows, in high temperature, deep-etching, will not influence the rigidity of bellows.Reasonable in design, clever structure of the invention, good sealing effect, almost shaft end No leakage, energy consumption is small, and equipment investment is few, operates steadily, and the incidence of accident is extremely low.
Description
Technical field
The present invention relates to a kind of mechanically-sealing apparatus, particularly a kind of bellows-type dry gas sealing device and encapsulating method.
Background technology
Dry gas seals belong to the non-contacting seal in mechanical seal, almost good sealing effect, shaft end No leakage；Energy
Consumption is small, only 5% or so of other class mechanical seals；The pollution and waste of oil are reduced, the sealing gas of use are mostly nitrogen
Gas, pollution-free to oil, the separated device of entrained oil can be reused after separating；Equipment investment is reduced, only blanket gas need to be provided
Source；Long service life.Air film makes between stationary ring and rotating ring almost without abrasion；Operate steadily, reduce the incidence of accident.
The flexible member that it is used predominantly spring, when the working condition of dry gas seals is high temperature, deep-etching, the rigidity of spring can be received
It is extremely unstable to influence, so that directly affecting sealing effectiveness.
To solve the deficiency of above-mentioned use spring agency, the present invention makees flexible member using metal bellows, instead of spring
And auxiliary seal ring, as flexible member and secondary sealing element, the deficiency brought using spring is solved well.And
Bellows inherently partial equilibrium type sealing, thus it is applied widely.Sylphon seal has resistance to negative under low pressure or negative pressure
Pressure and pumpage；Bellows still can work in pressure-resistant limit under high pressure；Simultaneously by improve the present invention can realize it is whole
Individual dry gas seals are a secondary seal structures of tandem, therefore under some special operation conditions, bellows-type dry gas sealing device
With the advantage that can not be substituted.
The content of the invention
It is an object of the invention to provide a kind of reasonable in design, clever structure, almost good sealing effect, shaft end herein
No leakage, energy consumption is small, and equipment investment is few, operates steadily, the extremely low bellows-type dry gas sealing device of the incidence of accident；Simultaneously
The present invention replaces traditional spring using bellows so that the present invention is wide using scope, and sealing effectiveness is obviously improved, work
It is very reliable, and cause that whole dry gas seals are a secondary seal structure of tandem by improving, therefore allow bellows-type
Dry gas sealing device has the advantage that can not be substituted.
The present invention is achieved in that a kind of bellows-type dry gas sealing device of construction, it is characterised in that：Including static
Part, revolving part, axle, inner corrugated pipe, outward corrugated tube and shell；The static element is fixed together by locating piece with shell；Institute
State revolving part and axle is fixed on by locknut, and follow the rotation of axle and rotate.Interior outward corrugated tube can play a part of spring, but
It is function and is played a part of long-range and spring, realize being worked under various environment using bellows, high temperature, strong will not be subject to
During corrosion, the rigidity of bellows is influenceed.
According to bellows-type dry gas sealing device of the present invention, it is characterised in that：Static element includes outer press cover, internal pressure
Lid, intermediate connector, comb, inner corrugated pipe seat and outward corrugated tube seat；The outer press cover and internal gland are connected by bolt and centre
Fitting is connected, and inner corrugated pipe seat and outward corrugated tube seat are connected by welding manner with internal gland and outer press cover respectively；The comb
It is connected with outer press cover by bolt.Static element thing is fixed on shell by locating piece, is static for the rotation of axle；It is wherein quiet
Comb in stop member is not contacted with the locknut in tumbler, with there is certain interval；Intermediate connector is not contacted with outer stationary seat,
Also there is certain interval.
According to bellows-type dry gas sealing device of the present invention, it is characterised in that：Revolving part includes interior rotating ring, outer dynamic
Ring, axle sleeve, outer rotating seat and clamping sleeve；The interior rotating ring is fixed between axle sleeve and outer rotating seat, and outer rotating ring is installed on outer quiet
In the middle of rotating seat and clamping sleeve；Clamping sleeve is connected by bolt with axle sleeve, is fixed and clamped finally by locknut and covered and axle sleeve connection
Part.
According to bellows-type dry gas sealing device of the present invention, it is characterised in that：Inner corrugated pipe is solid by welding manner
Due between interior throw-out collar and inner corrugated pipe seat；Outward corrugated tube is fixed between outward corrugated tube seat and outer throw-out collar by welding manner；
Interior throw-out collar and outer throw-out collar are connected by rubber o-ring with interior stationary ring and outer stationary ring respectively.
According to bellows-type dry gas sealing device of the present invention, it is characterised in that：Interior rotating ring is opened up with outer rotating ring end face
There is the dynamic pressure groove being evenly arranged.The dynamic pressure groove opened up on rotating ring surface realizes the gas imported by the groove when rotating ring rotates will
Seal face is pushed open；Dynamic pressure groove is uniformly distributed, it is therefore intended that the gas of importing is uniform so that the thrust-neutral that end face is received.
A kind of bellows-type dry gas seals method, it is characterised in that：Blanket gas（Medium gas）It is interior into interior sealing chamber
Outer rotating ring end face offers the dynamic pressure groove being evenly distributed, and inside and outside rotating ring introduces gas into seal face when rotating by dynamic pressure groove
Between, push sealing surface, the contactless operation of primary seal open；Similarly, gas is buffered（Nitrogen）Into external seal chamber, secondary seal is without connecing
Touch operation；The helium leak gas of secondary seal is leaked by one-level together with the medium gas leakage gas of primary seal and discharged,（One-level
Leakage is also the important indicator for monitoring dry gas seals operation conditions）Isolation gas respectively enters interior outside by comb, and outside is used for
Bearing oil is prevented to enter dry gas seals, inner side is then discharged together with the helium leak gas of secondary seal with two grades of leakages.
Whole dry gas seals are a secondary seal structures of tandem, and the air-film thickness between dynamic and static ring is rigidity, directly affects dress
The operational effect put, rigidity is more stable, and operational effect is better, many bullets before being far longer than due to the rigidity stability of bellows
Spring rigidity stability, this bellows-type dry gas seals were greatly improved than former spring dry gas seals stability.
Beneficial effect of the present invention is：By reasonably designing each part and by cleverly coordinating, realizing the present invention
Structure is compacter, causes that the present invention is wider using scope by rational improvement, and sealing effectiveness is obviously improved, during work
Sufficiently stable reliability；Using bellows as the stiffener in the present invention, instead of spring and auxiliary seal ring, as elastic unit
Part and secondary sealing element, solve the deficiency brought using spring well.And bellows inherently partial equilibrium
Type is sealed, therefore applied widely.Sylphon seal has resistance to negative pressure and pumpage under low pressure or negative pressure；Ripple under high pressure
Line pipe still can work in pressure-resistant limit；Greatly improve usage range of the invention.The present invention is the 1 of tandem
Level sealing structure so that sealing effectiveness is more preferably.
Brief description of the drawings
Fig. 1 is cross section view of the present invention
Fig. 2 is the end view of rotating ring and outer rotating ring in the present invention
In figure：1st, locating piece；2nd, outer press cover；3rd, intermediate connector；4th, internal gland；5th, interior rotating ring；6th, interior stationary ring；7th, it is interior to push away
Ring；8th, inner corrugated pipe seat；9th, outer rotating seat；10th, outward corrugated tube；11st, axle sleeve；12nd, clamping sleeve；13rd, locknut；14th, comb；15、
Axle；16th, outward corrugated tube seat；17th, inner corrugated pipe；18th, outer throw-out collar；19th, outer stationary ring；20th, outer rotating ring；21st, dynamic pressure groove；22nd, represent
Axle direction of rotation.
Specific embodiment
Below in conjunction with accompanying drawing 1-2, the present invention is described in detail, and the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole implementation
Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made
Every other embodiment, belongs to the scope of protection of the invention.
As shown in Figure 1-2, the present invention provides a kind of bellows-type dry gas sealing device, including static element herein, revolving part,
Axle 15, inner corrugated pipe 17, outward corrugated tube 10, and shell；The static element is fixed together by locating piece 1 and shell；It is described
Revolving part is fixed on axle 15 by locknut 13, and follows the rotation of axle 15 and rotate.
According to bellows-type dry gas sealing device of the present invention, static element includes outer press cover 2, internal gland 4, centre connection
Part 3, comb 14, inner corrugated pipe seat 8 and outward corrugated tube seat 16；The outer press cover 2 and internal gland 4 pass through bolt and intermediate connector
3 connections, inner corrugated pipe seat 8 and outward corrugated tube seat 16 are connected by welding manner with internal gland 4 and outer press cover 2 respectively；The comb
Tooth 14 is connected by bolt with outer press cover 2.
According to bellows-type dry gas sealing device of the present invention, revolving part includes interior rotating ring 5, outer rotating ring 20, axle sleeve 11,
Outer rotating seat 9 and clamping sleeve 12；The interior rotating ring 6 is fixed between axle sleeve 11 and outer quiet rotating seat 9, and outer rotating ring 20 is installed on outer
In the middle of rotating seat 9 and clamping sleeve 12；Clamping sleeve 12 is connected by bolt with axle sleeve 11, is fixed and clamped set 12 finally by locknut 13
With the connector of axle sleeve 11.
According to bellows-type dry gas sealing device of the present invention, inner corrugated pipe 17 is fixed on interior throw-out collar by welding manner
Between 7 and inner corrugated pipe seat 8；Outward corrugated tube 10 is fixed between outward corrugated tube seat 16 and outer throw-out collar 18 by welding manner；It is interior
Throw-out collar 7 and outer throw-out collar 18 are connected by rubber o-ring with interior stationary ring 6 and outer stationary ring 19 respectively.
According to bellows-type dry gas sealing device of the present invention, interior rotating ring 5 offers uniform cloth with the end face of outer rotating ring 20
The dynamic pressure groove 21 put.
The method of operation is：Blanket gas（Medium gas）Into interior sealing chamber, inside and outside rotating ring end face offers what is be evenly distributed
Dynamic pressure groove, between introducing gas into seal face by dynamic pressure groove when inside and outside rotating ring rotates, pushes sealing surface open, and primary seal is contactless
Operation；Similarly, gas is buffered（Nitrogen）Into external seal chamber, the contactless operation of secondary seal；The helium leak gas of secondary seal
Leaked by one-level together with the medium gas leakage gas of primary seal and discharged,（One-level leakage is also monitoring dry gas seals operation shape
The important indicator of condition）Isolation gas respectively enters interior outside by comb, and outside is used to prevent bearing oil from entering dry gas seals,
Then discharged with two grades of leakages together with the helium leak gas of secondary seal inner side.Whole dry gas seals are or two grades of tandem
Sealing structure, the air-film thickness between dynamic and static ring is rigidity, directly affects the operational effect of device, and rigidity is more stable, operation
Effect is better, many spring rate stability before being far longer than due to the rigidity stability of bellows, and this bellows-type is done
Hermetic seal was greatly improved than former spring dry gas seals stability.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or uses the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The scope most wide for causing.
Claims (4)
1. a kind of bellows-type dry gas sealing device, it is characterised in that：Including static element, revolving part, axle（15）, inner corrugated pipe
（17）, outward corrugated tube（10）And shell；The static element passes through locating piece（1）It is fixed together with shell；The revolving part leads to
Cross locknut（13）It is fixed on axle（15）, and follow axle（15）Rotation and rotate；The static element includes outer press cover（2）, internal pressure
Lid（4）, intermediate connector（3）, comb（14）, inner corrugated pipe seat（8）With outward corrugated tube seat（16）；The outer press cover（2）With it is interior
Gland（4）By bolt and intermediate connector（3）Connection, inner corrugated pipe seat（8）With outward corrugated tube seat（16）Respectively by welding
Mode and internal gland（4）And outer press cover（2）Connection；The comb（14）By bolt and outer press cover（2）Connection.
2. bellows-type dry gas sealing device according to claim 1, it is characterised in that：Revolving part includes interior rotating ring（5）, outward
Rotating ring（20）, axle sleeve（11）, outer rotating seat（9）And clamping sleeve（12）；The interior rotating ring（6）It is fixed on axle sleeve（11）With outer rotating ring
Seat（9）Between, outer rotating ring（20）It is installed on outer rotating seat（9）And clamping sleeve（12）It is middle；Clamping sleeve（12）By bolt and axle
Set（11）Connection, finally by locknut（13）Be fixed and clamped set（12）And axle sleeve（11）Connector.
3. bellows-type dry gas sealing device according to claim 1, it is characterised in that：Inner corrugated pipe（17）By welding side
Formula is fixed on interior throw-out collar（7）With inner corrugated pipe seat（8）Between；Outward corrugated tube（10）Outward corrugated tube seat is fixed on by welding manner
（16）With outer throw-out collar（18）Between；Interior throw-out collar（7）With outer throw-out collar（18）Pass through rubber o-ring and interior stationary ring respectively（6）It is quiet with outer
Ring（19）Connection.
4. bellows-type dry gas sealing device according to claim 2, it is characterised in that：Interior rotating ring（5）With outer rotating ring（20）
End face offers the dynamic pressure groove being evenly arranged（21）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510580854.6A CN105090518B (en) | 2015-09-14 | 2015-09-14 | Bellows-type dry gas sealing device and encapsulating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510580854.6A CN105090518B (en) | 2015-09-14 | 2015-09-14 | Bellows-type dry gas sealing device and encapsulating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105090518A CN105090518A (en) | 2015-11-25 |
| CN105090518B true CN105090518B (en) | 2017-06-30 |
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| CN201510580854.6A Active CN105090518B (en) | 2015-09-14 | 2015-09-14 | Bellows-type dry gas sealing device and encapsulating method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105757253A (en) * | 2016-04-26 | 2016-07-13 | 成都通密封股份有限公司 | Dry gas seal of long-distance pipeline natural gas compressor unit |
| CN106838332B (en) * | 2017-03-31 | 2019-06-28 | 成都赛乐化新机电有限公司 | Polyvinyl chloride mass polymerization kettle mechanical seal control system |
| CN108506496B (en) * | 2018-04-03 | 2023-06-13 | 北京化工大学 | Isolation type dynamic pressure sealing device and mechanical equipment |
| CN108757945B (en) * | 2018-06-20 | 2019-12-24 | 西安交通大学 | Hybrid lubrication end face seal structure |
| CN109667930A (en) * | 2018-12-21 | 2019-04-23 | 中国船舶重工集团公司第七0七研究所 | A kind of liquid floats the air-tightness device of inertia type instrument |
| CN117469370B (en) * | 2023-12-27 | 2024-03-08 | 中国核动力研究设计院 | Dry gas sealing device free of isolation gas |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1045330C (en) * | 1993-08-25 | 1999-09-29 | 日本皮拉工业株式会社 | A shaft seal device |
| JP3068432B2 (en) * | 1995-05-15 | 2000-07-24 | 三菱重工業株式会社 | mechanical seal |
| JP2002267027A (en) * | 2001-03-12 | 2002-09-18 | Mitsubishi Heavy Ind Ltd | Shaft seal device |
| JP3978324B2 (en) * | 2001-09-25 | 2007-09-19 | イーグル工業株式会社 | Mechanical seal device |
| CN202266676U (en) * | 2011-10-10 | 2012-06-06 | 西安永华集团有限公司 | Pump corrugated pipe dry gas seal device |
| CN202531849U (en) * | 2012-04-26 | 2012-11-14 | 成都赛乐化新机电有限公司 | Mechanical sealing device for high-temperature corrugated tubes |
| CN202971909U (en) * | 2012-12-10 | 2013-06-05 | 武汉钢铁(集团)公司 | Improved structure of comb tooth type oil catch |
| CN203413127U (en) * | 2013-08-19 | 2014-01-29 | 袁幼谷 | Dry gas seal device of pump double-end-face corrugated pipe |
| CN104632901A (en) * | 2013-11-11 | 2015-05-20 | 无锡市后宅振新机械有限公司 | Bearing block structure |
| CN204961830U (en) * | 2015-09-14 | 2016-01-13 | 成都赛乐化新机电有限公司 | Bellows type dry gas sealing device |
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| CN105090518A (en) | 2015-11-25 |
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Effective date of registration: 20190925 Address after: 610073 Nine Donghai Road, Qingyang Park, Jiaolong Industrial Port, Chengdu, Sichuan Province Co-patentee after: Chengdu Sailehua New Motor Co.Ltd Patentee after: Chengdu Huaxin Sealing Co., Ltd. Address before: 610036 Jinniu District Chengdu Sichuan Jinniu hi tech Industrial Park Patentee before: Chengdu Sailehua New Motor Co.Ltd |