CN105090518A - Corrugated pipe type dry gas seal device and seal method - Google Patents
Corrugated pipe type dry gas seal device and seal method Download PDFInfo
- Publication number
- CN105090518A CN105090518A CN201510580854.6A CN201510580854A CN105090518A CN 105090518 A CN105090518 A CN 105090518A CN 201510580854 A CN201510580854 A CN 201510580854A CN 105090518 A CN105090518 A CN 105090518A
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- China
- Prior art keywords
- dry gas
- corrugated pipe
- type dry
- rotating ring
- interior
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Classifications
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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
Abstract
The invention discloses a corrugated pipe type dry gas seal device and seal method. The corrugated pipe type dry gas seal device comprises a stationary component, a rotating component, a shaft, an inner corrugated pipe, an outer corrugated pipe and a casing, wherein the stationary component is fixed with the casing together through a positioning block; the rotating component is fixed to the shaft through a nut and rotates with the rotating of the shaft; and the inner corrugated pipe can perform the function of a spring but has a better effect than the spring. The corrugated pipe type dry gas seal device adopting the corrugated pipes works in various environments and cannot affect the rigidity of the corrugated pipes under the conditions of high temperature and strong corrosion. The corrugated pipe type dry gas seal device is reasonable in design, skillful in structure, great in seal effect, low in energy consumption, low in equipment investment, stable in running and low in accident occurring rate and nearly reaches no linkage at the shaft end.
Description
Technical field
The present invention relates to a kind of mechanical seal device, particularly a kind of bellow type dry gas sealing device and encapsulating method.
Background technique
Dry gas seals belongs to the noncontact seal in mechanical seal, good sealing effect, almost reaches axle head No leakage; Energy consumption is little, is only about 5% of other class mechanical seal; Reduce pollution and the waste of oil, the sealing gas of employing is nitrogen mostly, pollution-free to oil, and entrained oil can be reused after separator is separated; Decrease equipment investment, sealing source of the gas only need be provided; Long service life.Air film makes between stationary ring and rotating ring almost without wearing and tearing; Operate steadily, reduce the incidence rate of accident.Its elastic element adopted is mainly spring, and when the working condition of dry gas seals is high temperature, deep-etching, the rigidity of spring can be affected, extremely unstable, thus makes directly to affect sealing effect.
For solving the deficiency of above-mentioned employing spring agency, the present invention adopts metal bellows to make elastic element, replaces spring and auxiliary seal ring, doubles as elastic element and secondary sealing element, well solves and uses spring and the deficiency brought.And bellows inherently partial equilibrium type sealing, therefore applied widely.Under low pressure or negative pressure, sylphon seal has resistance to negative pressure and pumpage; Under high pressure bellows still can work in withstand voltage limit; Can realize whole dry gas seals by improvement the present invention is an in-line secondary seal structure simultaneously, and therefore under some special operation conditions, bellow type dry gas sealing device has the advantage that can not be substituted.
Summary of the invention
The object of the invention is to provide a kind of reasonable in design at this, structure is ingenious, good sealing effect, and almost reach axle head No leakage, energy consumption is little, and equipment investment is few, operates steadily, the bellow type dry gas sealing device that the incidence rate of accident is extremely low; The present invention simultaneously adopts bellows to replace traditional spring, make using scope of the present invention wide, sealing effect has obvious lifting, work also very reliable, and make whole dry gas seals be an in-line secondary seal structure by improvement, therefore allow bellow type dry gas sealing device have the advantage that can not be substituted.
The present invention is achieved in that a kind of bellow type dry gas sealing device of structure, it is characterized in that: comprise static element, revolving part, axle, inner corrugated pipe, outward corrugated tube and shell; Described static element is fixed together by positioning block and shell; Described revolving part is fixed on axle by locknut, and follows the rotation of axle and rotate.Interior outward corrugated tube can play the effect of spring, but function and the effect played is long-range and spring, work under adopting bellows to realize multiple environment, when can not be subject to high temperature, deep-etching, affect the rigidity of bellows.
According to bellow type dry gas sealing device of the present invention, it is characterized in that: static element comprises outer press cover, internal gland, intermediate connector, comb, inner corrugated pipe seat and outward corrugated tube seat; Described outer press cover is connected with intermediate connector by bolt with internal gland, and inner corrugated pipe seat is connected with internal gland and outer press cover respectively by welding manner with outward corrugated tube seat; Described comb is connected with outer press cover by bolt.Static element thing is fixed on shell by positioning block, and the rotation for axle is static; Comb wherein in static element does not contact with the locknut in rotating component, has and has certain interval; Intermediate connector does not contact with outer stationary seat, and also having has certain interval.
According to bellow type dry gas sealing device of the present invention, it is characterized in that: revolving part comprises interior rotating ring, outer rotating ring, axle sleeve, outer rotating seat and clamping sleeve; Described interior rotating ring is fixed between axle sleeve and outer rotating seat, and outer rotating ring is installed in the middle of outer quiet rotating seat and clamping sleeve; Clamping sleeve is connected with axle sleeve by bolt, is fixed and clamped overlaps and shaft housing connector finally by locknut.
According to bellow type dry gas sealing device of the present invention, it is characterized in that: inner corrugated pipe is fixed between interior throw-out collar and inner corrugated pipe seat by welding manner; Outward corrugated tube is fixed between outward corrugated tube seat and outer throw-out collar by welding manner; Interior throw-out collar is connected with interior stationary ring and outer stationary ring respectively by rubber o-ring with outer throw-out collar.
According to bellow type dry gas sealing device of the present invention, it is characterized in that: interior rotating ring and outer rotating ring end face offer the dynamic pressure groove be evenly arranged.The dynamic pressure groove offered on rotating ring surface is achieved the gas imported by this groove when rotating ring rotates and is pushed open by seal face; Distributed uniformly by dynamic pressure groove, object is the gas uniform imported, and makes the thrust-neutral that end face is subject to.
A kind of bellow type dry gas seals method, it is characterized in that: blanket gas (medium gas) enters interior sealed chamber, and inside and outside rotating ring end face offers the dynamic pressure groove be evenly distributed, by dynamic pressure groove, gas is imported between seal face when inside and outside rotating ring rotates, push sealing surface open, the contactless operation of primary seal; In like manner, cushion gas (nitrogen) enters external sealed chamber, the contactless operation of secondary seal; The helium leak gas of secondary seal is leaked by one-level and discharges together with the medium gas leakage gas of primary seal, (it is also the important indicator of monitoring dry gas seals operation conditions that one-level is leaked) is isolated gas and is entered interior outside respectively by comb, outside is for stoping bearing oil to enter dry gas seals, and inner side is then leaked with secondary and discharged together with the helium leak gas of secondary seal.Whole dry gas seals is an in-line secondary seal structure, air-film thickness between dynamic and static ring and rigidity, directly affects the operational effect of device, rigidity is more stable, operational effect is better, due to the rigidity stability of bellows be far longer than before many spring rates stability, this bellow type dry gas seals than before spring dry gas seals stability greatly improve.
Beneficial effect of the present invention is: by reasonably designing each parts and passing through to coordinate cleverly, realize structure of the present invention compacter, make using scope of the present invention wider by reasonably improving, sealing effect has obvious lifting, also very reliable and stable during work; Adopt bellows as the rigid member in the present invention, replace spring and auxiliary seal ring, double as elastic element and secondary sealing element, well solve and use spring and the deficiency brought.And bellows inherently partial equilibrium type sealing, therefore applied widely.Under low pressure or negative pressure, sylphon seal has resistance to negative pressure and pumpage; Under high pressure bellows still can work in withstand voltage limit; Improve usage range of the present invention greatly.The present invention is an in-line secondary seal structure, makes sealing effect better.
Accompanying drawing explanation
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: 1, positioning block; 2, outer press cover; 3, intermediate connector; 4, internal gland; 5, interior rotating ring; 6, interior stationary ring; 7, interior throw-out collar; 8, inner corrugated pipe seat; 9, outer rotating seat; 10, outward corrugated tube; 11, axle sleeve; 12, clamping sleeve; 13, locknut; 14, comb; 15, axle; 16, outward corrugated tube seat; 17, inner corrugated pipe; 18, outer throw-out collar; 19, outer stationary ring; 20, outer rotating ring; 21, dynamic pressure groove; 22, axle sense of rotation is represented.
Embodiment
Below in conjunction with accompanying drawing 1-2, the present invention is described in detail, is clearly and completely described the technological scheme in the embodiment of the present invention, and obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1-2, the present invention provides a kind of bellow type dry gas sealing device at this, comprises static element, revolving part, axle 15, inner corrugated pipe 17, outward corrugated tube 10, and shell; Described static element is fixed together by positioning block 1 and shell; Described revolving part is fixed on axle 15 by locknut 13, and follows the rotation of axle 15 and rotate.
According to bellow type dry gas sealing device of the present invention, static element comprises outer press cover 2, internal gland 4, intermediate connector 3, comb 14, inner corrugated pipe seat 8 and outward corrugated tube seat 16; Described outer press cover 2 is connected with intermediate connector 3 by bolt with internal gland 4, and inner corrugated pipe seat 8 is connected with internal gland 4 and outer press cover 2 respectively by welding manner with outward corrugated tube seat 16; Described comb 14 is connected with outer press cover 2 by bolt.
According to bellow type dry gas sealing device of the present invention, revolving part comprises interior rotating ring 5, outer rotating ring 20, axle sleeve 11, outer rotating seat 9 and clamping sleeve 12; Described interior rotating ring 6 is fixed between axle sleeve 11 and outer quiet rotating seat 9, and outer rotating ring 20 is installed in the middle of outer rotating seat 9 and clamping sleeve 12; Clamping sleeve 12 is connected with axle sleeve 11 by bolt, to be fixed and clamped cover 12 and axle sleeve 11 link finally by locknut 13.
According to bellow type dry gas sealing device of the present invention, inner corrugated pipe 17 is fixed between interior throw-out collar 7 and inner corrugated pipe seat 8 by welding manner; Outward corrugated tube 10 is fixed between outward corrugated tube seat 16 and outer throw-out collar 18 by welding manner; Interior throw-out collar 7 is connected with interior stationary ring 6 and outer stationary ring 19 respectively by rubber o-ring with outer throw-out collar 18.
According to bellow type dry gas sealing device of the present invention, interior rotating ring 5 offers with outer rotating ring 20 end face the dynamic pressure groove 21 be evenly arranged.
The method of operation is: blanket gas (medium gas) enters interior sealed chamber, and inside and outside rotating ring end face offers the dynamic pressure groove be evenly distributed, and imports between seal face, push sealing surface open, primary seal contactless operation when inside and outside rotating ring rotates by dynamic pressure groove by gas; In like manner, cushion gas (nitrogen) enters external sealed chamber, the contactless operation of secondary seal; The helium leak gas of secondary seal is leaked by one-level and discharges together with the medium gas leakage gas of primary seal, (it is also the important indicator of monitoring dry gas seals operation conditions that one-level is leaked) is isolated gas and is entered interior outside respectively by comb, outside is for stoping bearing oil to enter dry gas seals, and inner side is then leaked with secondary and discharged together with the helium leak gas of secondary seal.Whole dry gas seals is an in-line secondary seal structure, air-film thickness between dynamic and static ring and rigidity, directly affects the operational effect of device, rigidity is more stable, operational effect is better, due to the rigidity stability of bellows be far longer than before many spring rates stability, this bellow type dry gas seals than before spring dry gas seals stability greatly improve.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. a bellow type dry gas sealing device, is characterized in that: comprise static element, revolving part, axle (15), inner corrugated pipe (17), outward corrugated tube (10) and shell; Described static element is fixed together by positioning block (1) and shell; Described revolving part is fixed on axle (15) by locknut (13), and follows the rotation of axle (15) and rotate.
2. bellow type dry gas sealing device according to claim 1, is characterized in that: static element comprises outer press cover (2), internal gland (4), intermediate connector (3), comb (14), inner corrugated pipe seat (8) and outward corrugated tube seat (16); Described outer press cover (2) is connected with intermediate connector (3) by bolt with internal gland (4), and inner corrugated pipe seat (8) is connected with internal gland (4) and outer press cover (2) respectively by welding manner with outward corrugated tube seat (16); Described comb (14) is connected with outer press cover (2) by bolt.
3. bellow type dry gas sealing device according to claim 1, is characterized in that: revolving part comprises interior rotating ring (5), outer rotating ring (20), axle sleeve (11), outer rotating seat (9) and clamping sleeve (12); Described interior rotating ring (6) is fixed between axle sleeve (11) and outer rotating seat (9), and outer rotating ring (20) is installed in the middle of outer rotating seat (9) and clamping sleeve (12); Clamping sleeve (12) is connected with axle sleeve (11) by bolt, to be fixed and clamped cover (12) and axle sleeve (11) link finally by locknut (13).
4. bellow type dry gas sealing device according to claim 1 or claim 2 or claim 3, is characterized in that: inner corrugated pipe (17) is fixed between interior throw-out collar (7) and inner corrugated pipe seat (8) by welding manner; Outward corrugated tube (10) is fixed between outward corrugated tube seat (16) and outer throw-out collar (18) by welding manner; Interior throw-out collar (7) is connected with interior stationary ring (6) and outer stationary ring (19) respectively by rubber o-ring with outer throw-out collar (18).
5. bellow type dry gas sealing device according to claim 4, is characterized in that: interior rotating ring (5) and outer rotating ring (20) end face offer the dynamic pressure groove (21) be evenly arranged.
6. a bellow type dry gas seals method, it is characterized in that: blanket gas enters interior sealed chamber, inside and outside rotating ring end face offers the dynamic pressure groove be evenly distributed, and imports between seal face when inside and outside rotating ring rotates by dynamic pressure groove by gas, push sealing surface open, the contactless operation of primary seal; In like manner, cushion gas enters external sealed chamber, the contactless operation of secondary seal; The helium leak gas of secondary seal is leaked by one-level and discharges together with the medium gas leakage gas of primary seal; isolation gas enters interior outside respectively by comb; outside is for stoping bearing oil to enter dry gas seals, and inner side is then leaked with secondary and discharged together with the helium leak gas of secondary seal; Whole dry gas seals is an in-line secondary seal structure, air-film thickness between dynamic and static ring and rigidity, directly affects the operational effect of device, rigidity is more stable, operational effect is better, due to the rigidity stability of bellows be far longer than before many spring rates stability, this bellow type dry gas seals than before spring dry gas seals stability greatly improve.
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 |
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| Publication Number | Publication Date |
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| CN105090518A true CN105090518A (en) | 2015-11-25 |
| CN105090518B 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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Cited By (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 |
| CN106838332A (en) * | 2017-03-31 | 2017-06-13 | 成都赛乐化新机电有限公司 | Polyvinyl chloride mass polymerization kettle mechanical seal control system |
| CN108506496A (en) * | 2018-04-03 | 2018-09-07 | 北京化工大学 | A kind of isolated form dynamic pressure sealing device and mechanical equipment |
| CN108757945A (en) * | 2018-06-20 | 2018-11-06 | 西安交通大学 | A kind of 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 |
| CN117469370A (en) * | 2023-12-27 | 2024-01-30 | 中国核动力研究设计院 | Dry gas sealing device free of isolation gas |
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Cited By (9)
| 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 |
| CN106838332A (en) * | 2017-03-31 | 2017-06-13 | 成都赛乐化新机电有限公司 | Polyvinyl chloride mass polymerization kettle mechanical seal control system |
| 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 |
| CN108506496A (en) * | 2018-04-03 | 2018-09-07 | 北京化工大学 | A kind of isolated form dynamic pressure sealing device and mechanical equipment |
| CN108506496B (en) * | 2018-04-03 | 2023-06-13 | 北京化工大学 | Isolation type dynamic pressure sealing device and mechanical equipment |
| CN108757945A (en) * | 2018-06-20 | 2018-11-06 | 西安交通大学 | A kind of 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 |
| CN117469370A (en) * | 2023-12-27 | 2024-01-30 | 中国核动力研究设计院 | Dry gas sealing device free of isolation gas |
| 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 |
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| CN105090518B (en) | 2017-06-30 |
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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 |