CN207906451U - A kind of mechanical seal with moving ring sleeve - Google Patents
A kind of mechanical seal with moving ring sleeve Download PDFInfo
- Publication number
- CN207906451U CN207906451U CN201820229484.0U CN201820229484U CN207906451U CN 207906451 U CN207906451 U CN 207906451U CN 201820229484 U CN201820229484 U CN 201820229484U CN 207906451 U CN207906451 U CN 207906451U
- Authority
- CN
- China
- Prior art keywords
- ring
- sleeve
- face
- seal
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 238000007789 sealing Methods 0.000 claims abstract description 50
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 239000003292 glue Substances 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 238000012856 packing Methods 0.000 claims description 12
- 230000008901 benefit Effects 0.000 abstract description 9
- 238000012423 maintenance Methods 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 2
- 210000004907 gland Anatomy 0.000 description 9
- 239000003921 oil Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 235000018992 Prunus glandulosa Nutrition 0.000 description 1
- 240000001619 Prunus glandulosa Species 0.000 description 1
- 235000013999 Prunus japonica Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
Abstract
The utility model is related to a kind of mechanical seals with moving ring sleeve, the mechanical seal with moving ring sleeve is by forward end seal face, middle part filled cavity and back-end sealing face composition, moving ring sleeve by the rotating ring of front and back end two all fixed connections together, it is the check valve valve plate for being coupled with shift fork and being rotated together with axis under the cooperation of moving ring sleeve sealing ring and can slid axially back and forth on axle sleeve axis as preparation on fluid leak path with axle sleeve axis, thus the mechanical seal formed, which does not have to oil sealing, can also realize zero leakage, it is fool proof reliable, and it is easily installed maintenance, long-term operation, better Social benefit and economic benefit is brought to user, thus there is extensive popularizing value.
Description
Technical field
The utility model is related to a kind of mechanical seal of rotary shaft more particularly to a kind of mechanical seals with moving ring sleeve.
Background technology
Currently, in order to ensure to keep the safety in production and perform environmental protection work, required in the equipment using mechanical seal
The safe and reliable long-term operation of mechanical seal energy, especially conveys poisonous and harmful, flammable and explosive fluid medium set in production
Even more there is such requirement for upper.
In order to reach this requirement, logical Chinese bush cherry is all additionally arranged the auxiliary such as sealing oil system using the equipment of mechanical seal to these and sets
It applies, but also increases the cost of working service mechanical seal, expense some has been even up to four points of equipment purchase cost
One of, thus this is a no small burden for users.And for high-temperature pump, still also there is hidden danger, because of high temperature
Oil sealing also has the possibility that fire incident occurs once a large amount of leakages.Then occur a kind of muddy packing sealing, this kind sealing again
It is respectively to put two circles in the rear and front end of the i.e. also known as seal chamber of stuffing-box to be molded packing, in-between cavity is enriched with muddy packing, so
Sealing can also be realized without oil sealing by being compressed afterwards with gland, but the annular gap due to being formed between both ends packing and axis can be because of abrasion
And increase, for a long time, especially when sealed medium pressure is higher, muddy packing, which can be thrown out of, to be come and makes seal failure,
Thus its reliability is not as good as people's will.
The advantages of both being sealed, integrates, and makes a kind of new product, is ensureing safety in production in this way and is making
While good environmental protection work, maintenance is made to substantially reduce using the cost of mechanical seal, this undoubtedly can be by user
It welcomes.
It is therefore desirable to design a kind of mechanical seal with moving ring sleeve, to overcome the above problem.
Utility model content
The purpose of the utility model is to overcome the defects of the prior art, provide a kind of mechanical seal with moving ring sleeve,
It makes maintenance cost substantially reduce while ensureing safety in production and performing environmental protection work.
The utility model is realized in this way：
The utility model provides a kind of mechanical seal with moving ring sleeve, and the mechanical seal with moving ring sleeve is by forward end seal
Face, middle part filled cavity and back-end sealing face composition；
The front end of front end rotating ring and moving ring sleeve is threadedly coupled, and restrictor ring is in the annular groove of spring base front end and is sleeved on
Clearance seal is formed on the anchor ring of rotating ring outer ring, front end stationary ring is fixed on spring base under stationary ring sealing ring and the cooperation of stationary ring stop pin
In the annular seating of front end, the end face of end face and front end rotating ring fits closely to form forward end seal face；
The middle part outer ring surface of moving ring sleeve by inner ring surface in the middle part of spring base and in being enclosed in constitute middle part filled cavity and by
Forward end seal face and back-end sealing face are provided with threaded mounting hole in the middle part of axial closing, spring base and are connected with glue injection machine cavity,
And muddy packing is injected into the filled cavity of middle part by glue injection machine cap；
The rear end screw thread of rear end rotating ring and moving ring sleeve is closely coupled, and rear end stationary ring is in stationary ring sealing ring and stationary ring stop pin
Be fixed under cooperation in the annular seating of compensation ring set, compensation ring set by compensating ring ring set in the rear end of spring base,
It is upper that the compensation ring stop pin inserted in spring base hole is housed, and by the resilient force of the elastic element on spring base, make
The end face of rear end stationary ring and the end face of rear end rotating ring, which are adjacent to, constitutes back-end sealing face.
Further, moving ring sleeve is connected with axle sleeve using shift fork, and by the engagement sleeves of seal ring of moving ring on axle sleeve.
Further, the elastic element includes multiple little springs.
Further, described that elastic element is set in the elastic element mounting hole of spring base, the compensation ring sealing
Circle is set in compensation ring seal groove.
The utility model has the advantages that：
The mechanical seal with moving ring sleeve is had the following advantages by said mechanism：It is fool proof reliable, do not have to oil sealing
Also it can realize zero leakage, and be easily installed maintenance, long-term operation brings better Social benefit and economic benefit to user,
Thus there is extensive popularizing value.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the mechanical seal structure sectional view with moving ring sleeve that the utility model embodiment provides, the figure top half
It is the mechanical seal structure sectional view of unbalanced type moving ring sleeve, lower half portion is the mechanical seal structure section view of balanced type moving ring sleeve
Figure；
Fig. 2 is the main sectional view for the moving ring sleeve that the utility model embodiment provides；
Fig. 3 is the side view for the moving ring sleeve that the utility model embodiment provides；
Fig. 4 is the main sectional view for the axle sleeve that the utility model embodiment provides；
Fig. 5 is the side view for the axle sleeve that the utility model embodiment provides；
Fig. 6 is the sectional view for the spring base that the utility model embodiment provides；
Fig. 7 is the side view for the spring base that the utility model embodiment provides；
In figure：1- axle sleeves, 2- axle sleeve pads, the front ends 3- rotating ring, 4- restrictor rings, the front ends 5- stationary ring, 6- spring bases, 7- rotating rings
Set, 8- gland rings, 9- glue injection machine cavitys, 10- glue injection machine caps, 11- cooling water entrances, 12- glands, 13- compensate ring set,
The rear ends 14- stationary ring, the rear ends 15- rotating ring, 16- compensate ring sealing ring, 17- moving ring sleeve sealing rings, 18- sleeve sealing circles, the front ends 19-
Anti-friction ring, 20- balanced type axle sleeves, 21- balanced type seal ring of moving ring, 22- balanced type rotating rings, 23- stationary ring sealing rings, 24- stationary rings
Stop pin, 25- elastic elements, 26- compensate ring stop pin, the rear ends 27- anti-friction ring, 28- gland bolts, 29- fork slots, 30 shift forks
Tooth, A- forward end seals face, B- back-end sealings face, 3a- moving ring sleeve nose threads, 15a- moving ring sleeves rear end screw thread, the front ends 19a- subtract
Rub annular groove, 17a- moving ring sleeve seal grooves, 18a- sleeve sealing ring recess, 4a- throttling annular grooves, 23a- stationary ring seal grooves, 24a-
Stationary ring anti-rotation pin hole, 8a- gland ring slots, 9a- glue injection machine cavity mounting holes, 16a- compensate ring seal groove, 25a- elasticity
Element mounting hole.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are in the premise for not making creative work
Lower obtained all other embodiment, shall fall within the protection scope of the present invention.
Such as Fig. 1 to Fig. 7, the utility model embodiment provides a kind of mechanical seal with moving ring sleeve, described with moving ring sleeve
Mechanical seal is made of forward end seal face A, middle part filled cavity and back-end sealing face B.
Such as Fig. 1 to Fig. 7, the front end of front end rotating ring 3 and moving ring sleeve 7 is threadedly coupled, and restrictor ring 4 is embedded in 6 front end of spring base
Annular groove in and be sleeved on the anchor ring of rotating ring outer ring and form clearance seal, front end stationary ring 5 is in stationary ring sealing ring 23 and stationary ring anti-rotation
Pin 24 is fixed under coordinating in the annular seating of 6 front end of spring base, and the end face of end face and front end rotating ring 3 fits closely to form front end
Sealing surface A.
Such as Fig. 1 to Fig. 7, during the middle part outer ring surface of the moving ring sleeve 7 by 6 middle part inner ring surface of spring base and in being enclosed in constitutes
Portion's filled cavity is simultaneously provided with threaded mounting hole and note by forward end seal face A and back-end sealing face B in the middle part of axial closing, spring base 6
Glue device cavity 9 is connected, and muddy packing is injected into the filled cavity of middle part by glue injection machine cap 10.
Such as Fig. 1 to Fig. 7, the rear end screw thread of rear end rotating ring 15 and moving ring sleeve 7 is closely coupled, and rear end stationary ring 14 is close in stationary ring
Seal 23 and stationary ring stop pin 24 are fixed under coordinating in the annular seating of compensation ring set 13, and compensation ring set 13 is by compensating ring sealing
Circle 16 is sleeved on the rear end of spring base 6, the compensation ring stop pin 26 inserted in 6 hole of spring base is housed thereon, and by mounted in spring
The resilient force of elastic element 25 on seat 6, after the end face of the end face and rear end rotating ring 15 that make rear end stationary ring 14 is adjacent to composition
Hold sealing surface B.
Such as Fig. 1 to Fig. 7, further, front and back end two rotating ring A, B are closely linked together with screw thread by moving ring sleeve 7,
Moving ring sleeve component is formed, and moving ring sleeve 7 is connected with axle sleeve 1 using shift fork, and by the engagement sleeves of seal ring of moving ring 17 in axle sleeve 1
On, thus moving ring sleeve 7 can be rotated together with axle sleeve 1 and can be slid axially back and forth on axle sleeve 1, thus only with one group of elasticity member
Part 25 can be such that former and later two seal faces A, B is adjacent to work at the same time, and the middle part filled cavity between the two end faces then can be used
Closely filling forms sufficiently long sealing entity to muddy packing.
Such as Fig. 1 to Fig. 7, wherein there are two types of structures for front end rotating ring, another one is the front end rotating ring 3 of unbalanced type structure
Kind is then the balanced type rotating ring 22 of balanced structure, and the latter can be used under the operating mode of elevated pressures, at this time seal ring of moving ring 17
Sealing function change and served as by balanced type seal ring of moving ring 21, axle sleeve 1 is then changed to balanced type axle sleeve 20, moving ring sleeve sealing ring 17
It is changed to rear end anti-friction ring 27.
The erection sequence of the mechanical seal with moving ring sleeve is as follows：
Stationary ring sealing ring 23 is put into the stationary ring seal groove 23a of 6 front end of spring base, then will be furnished with stationary ring stop pin 24
Front end stationary ring 5 be aligned stationary ring anti-rotation pin hole 24a implement completely.
By restrictor ring 4 in the throttling annular groove 4a of 6 front end of spring base.
7 front end of moving ring sleeve is pierced by from the interior annular distance of front end stationary ring 5, and front end rotating ring 3 is passed through into 7 front end spiral shell of moving ring sleeve
Line 3a connections in place, and are locked using specific purpose tool, prevent it from loosening at work.
Then assembled structural vertical above is put makes the rear end of moving ring sleeve 7 upward on the table, at this time spring base 6
Rear end also together upward, since the gravity of spring base 6 can be such that forward end seal face A is adjacent to.
As the mounting means of front end stationary ring 5, rear end stationary ring 14 is also prepared in compensation ring set 13, while also being mixed
It compensates ring stop pin 26 and constitutes compensation ring set component.
Then it is multiple little springs by 25 this example elastic element of elastic element, quantity is by sealing diameter of axle specification size
What is determined is put into 6 elastic element mounting hole 25a of spring base, and compensation ring sealing ring 16 is then put into compensation ring seal groove
In 16a, then ring set assembly set will be compensated in 6 rear end tails of spring base, and pay attention to the compensation ring for matching compensation ring set 13 at this time
Stop pin 26 is inserted into little spring hole.
Then rear end rotating ring 15 is linked up by 7 rear end screw thread 15a of moving ring sleeve, makes end face and the dress of rear end rotating ring 15
The end face of rear end stationary ring 14 on compensation ring set component is bonded, and slowly rear end rotating ring 15 is tightened, and is compensated in this process
After ring set component can gradually compress elastic element 25 when the elastic element mounting hole 25a face pastes of its bottom and spring base 6 are lived
Then end rotating ring 15 becomes fitted to position prevents it from loosening at work moving ring sleeve 7 rear end screw thread 15a fastenings with specific purpose tool.
Poly- by walking above, the first dress process of the mechanical seal with moving ring sleeve just completes, then can be by following
Poly- be mounted in equipment of step uses：
The axle sleeve 1 of axle sleeve pad 2, sleeve sealing circle 18, front end anti-friction ring 19, moving ring sleeve sealing ring 17 will be prepared mounted in equipment
On axis and lock in place.
Gland 12 is sleeved in the mechanical seal with moving ring sleeve just installed, and is paid attention to it for dress glue injection machine cavity 9
The glue injection machine cavity mounting hole 9a that perforation and the middle part of spring base 6 are opened is inserted into and tightens to good, then by glue injection machine cavity 9, at this time
Muddy packing can be threaded in glue injection machine cap 10 and muddy packing is pressed into the filled cavity of middle part, in indentation
Moving ring sleeve component is rotated until muddy packing is full of.
The above-mentioned mechanical seal with moving ring sleeve for preparing gland ring 8 is sleeved on to the sealing that equipment is pressed on axle sleeve 1
Gland bolt 28 is symmetrically and evenly tightened in chamber, which can devote oneself to work in equipment.
Cleaning and the lubrication work that should be noted that each part in the above installation process, especially in front and back seal face A, B
With lubricating oil or fat appropriate should be smeared on moving ring sleeve sealing ring 17 and anti-friction ring to ensure that moving ring sleeve component can move axially back and forth
Dynamic, front and back end thread connection should all be smeared fluid sealant to ensure the sealing reliability of thread connection by moving ring sleeve 7.
Back-end sealing face B generates higher temperature at runtime in order to prevent, can be from the cooling water entrance 11 on gland
It introduces cooling water and cools down flushing to it.
Described above is the installation and application for the mechanical seal that unbalanced type drives ring set, and balanced type is with moving ring sleeve
Mechanical seal is referred to execute.
In conclusion the mechanical seal with moving ring sleeve is by forward end seal face, middle part filled cavity and back-end sealing face three
Part forms, and the rotating ring of front and back end two all fixed connections are to be coupled with shift fork and in rotating ring with axle sleeve axis together by moving ring sleeve
It covers to rotate together and can slide axially back and forth on axle sleeve axis with axis under the cooperation of sealing ring and lead in fluid leakage as preparation
Check valve valve plate on road, the mechanical seal thus formed, which does not have to oil sealing, can also realize zero leakage, fool proof reliable, and be easy to
Installation maintenance, long-term operation bring better Social benefit and economic benefit to user, thus have and widely promote the use of
Value.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection domain within.
Claims (4)
1. a kind of mechanical seal with moving ring sleeve, which is characterized in that the mechanical seal with moving ring sleeve is by forward end seal face
(A), middle part filled cavity and back-end sealing face (B) composition；
The front end of front end rotating ring (3) and moving ring sleeve (7) is threadedly coupled, and restrictor ring (4) is embedded in the annular groove of spring base (6) front end
Interior and be sleeved on the anchor ring of rotating ring outer ring and form clearance seal, front end stationary ring (5) is in stationary ring sealing ring (23) and stationary ring stop pin
(24) it is fixed in the annular seating of spring base (6) front end under coordinating, the end face of end face and front end rotating ring (3) fits closely to be formed
Forward end seal face (A)；
Middle part filled cavity is constituted simultaneously by inner ring surface in the middle part of spring base (6) and the middle part outer ring surface for being enclosed in interior moving ring sleeve (7)
By forward end seal face (A) and back-end sealing face (B) threaded mounting hole and glue injection machine are provided in the middle part of axial closing, spring base (6)
Cavity (9) is connected, and muddy packing is injected into the filled cavity of middle part by glue injection machine cap (10)；
The rear end screw thread of rear end rotating ring (15) and moving ring sleeve (7) is closely coupled, and rear end stationary ring (14) is in stationary ring sealing ring (23)
It is fixed under coordinating with stationary ring stop pin (24) in the annular seating of compensation ring set (13), compensation ring set (13) is by compensating ring sealing
Circle (16) is sleeved on the rear end of spring base (6), thereon equipped with the compensation ring stop pin (26) inserted in spring base (6) hole, and by
The resilient force of elastic element (25) on spring base (6) makes end face and the rear end rotating ring (15) of rear end stationary ring (14)
End face be adjacent to constitute back-end sealing face (B).
2. the mechanical seal with moving ring sleeve as described in claim 1, it is characterised in that：Moving ring sleeve (7) and axle sleeve (1), which use, to be dialled
Fork connection, and by the engagement sleeves of seal ring of moving ring (17) on axle sleeve (1).
3. the mechanical seal with moving ring sleeve as claimed in claim 1 or 2, it is characterised in that：The elastic element (25) includes
Multiple little springs.
4. the mechanical seal with moving ring sleeve as claimed in claim 3, it is characterised in that：It is described to be set to elastic element (25)
In the elastic element mounting hole (25a) of spring base (6), the compensation ring sealing ring (16) is set to compensation ring seal groove
In (16a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820229484.0U CN207906451U (en) | 2018-02-09 | 2018-02-09 | A kind of mechanical seal with moving ring sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820229484.0U CN207906451U (en) | 2018-02-09 | 2018-02-09 | A kind of mechanical seal with moving ring sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207906451U true CN207906451U (en) | 2018-09-25 |
Family
ID=63559747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820229484.0U Withdrawn - After Issue CN207906451U (en) | 2018-02-09 | 2018-02-09 | A kind of mechanical seal with moving ring sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207906451U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131418A (en) * | 2018-02-09 | 2019-08-16 | 武汉市龙深密封件制造有限公司 | A kind of mechanical seal with moving ring sleeve |
-
2018
- 2018-02-09 CN CN201820229484.0U patent/CN207906451U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131418A (en) * | 2018-02-09 | 2019-08-16 | 武汉市龙深密封件制造有限公司 | A kind of mechanical seal with moving ring sleeve |
| CN110131418B (en) * | 2018-02-09 | 2024-04-02 | 武汉市龙深密封件制造有限公司 | Mechanical seal driving ring sleeve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105464882B (en) | Main shaft sealing device and the axial flow hydraulic turbine with the device | |
| CN205577924U (en) | Automatic oiling auxiliary seal device of beam -pumping unit well head polished rod sealing packing box | |
| CN207906451U (en) | A kind of mechanical seal with moving ring sleeve | |
| CN109281889A (en) | A kind of combination sealing arrangement and hydraulic cylinder for hydraulic cylinder piston | |
| CN110131418A (en) | A kind of mechanical seal with moving ring sleeve | |
| CN104279386B (en) | Piston balance compensating high-speed and high-pressure rotary joint | |
| CN208106693U (en) | Reciprocating compressor improvement of padding structure | |
| CN207245650U (en) | High-pressure mechanical seal oil-well rig floating punch pipe assembly | |
| CN205559794U (en) | Mining double -chain conveyor seals sub -assembly | |
| CN107795295A (en) | A kind of well head adjustable energy-storing seals blowout hookup | |
| CN202149024U (en) | Inner-engaged gear pump and gap filling component | |
| CN105437588B (en) | A kind of self-locking swings hydraulic press | |
| CN106151524B (en) | A kind of I-shaped double mechanical seal for blocking chamber of band | |
| CN201802343U (en) | Double-sealed high pressure valve for well head | |
| CN202249772U (en) | Novel roller bit sealing structure | |
| CN209339895U (en) | Adjustable offset pumping unit rod sealing device | |
| CN205330867U (en) | Shaft seal device and have device's axial flow turbine | |
| CN203585335U (en) | Mechanical sealing device used for thick slurry | |
| CN201218071Y (en) | Dynamic correcting polished rod sealer | |
| CN101956539A (en) | Follow-up centering sealing device of pumping well head | |
| CN209067580U (en) | A kind of hydraulic cylinder piston combination sealing arrangement | |
| RU191857U1 (en) | High reliability ring preventer | |
| CN208935382U (en) | High viscosity vapour-liquid mixing pump major-minor seals independent compensation sealing mechanism | |
| CN205743811U (en) | Support, sealing and the lubrication system of a kind of trailing type wellhead sealing device | |
| CN110081250A (en) | Band centrifugation drip ring automatic Regulation seals water supply device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180925 Effective date of abandoning: 20240402 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180925 Effective date of abandoning: 20240402 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |