CN208364788U - Lip shape mechanically-sealing apparatus - Google Patents
Lip shape mechanically-sealing apparatus Download PDFInfo
- Publication number
- CN208364788U CN208364788U CN201820724380.7U CN201820724380U CN208364788U CN 208364788 U CN208364788 U CN 208364788U CN 201820724380 U CN201820724380 U CN 201820724380U CN 208364788 U CN208364788 U CN 208364788U
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- Prior art keywords
- lip
- outer peripheral
- peripheral surface
- face
- 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.)
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Abstract
The utility model discloses a kind of lip shape mechanically-sealing apparatus, including mounting base, compensating element, and two ring bodies, two ring bodies are respectively stationary ring body and rotating ring body, and planar end surface sealing is formed between stationary ring body and the both ends of the surface of rotating ring body contact；Also there is at least one of lip shape end face seal and the sealing of lip shape outer peripheral surface between two ring bodies, lip shape end face seal is that the end face of end face seal lip and ring body pushes against to be formed, and outer peripheral surface that lip shape outer peripheral surface is sealed into outer peripheral surface sealing lip and the ring body, which pushes against, to be formed.The utility model uses the structure type of lip packing, and processes pumping groove in lip, and the medium reversing pump of leakage is sent back, sealing effect is enhanced；In addition the frictional heat between seal face is substantially reduced using PTFE material, reduces the abrasion of seal face, prevents temperature from increasing, the leakage of face opening caused by medium gasifies and shock are damaged.
Description
Technical field
The utility model relates to technical field of mechanical, more particularly to a kind of mechanically-sealing apparatus, are mainly used for revolving
In favourable turn tool, such as various pumps, compressor and reaction Fu.
Background technique
Mechanical seal (mechanical seal) refers to by least a pair of end face perpendicular to rotation axis in Fluid pressure
With keep under the action of compensation mechanism elastic force (or magnetic force) and under the cooperation of auxiliary seal being bonded and constituting with respect to sliding
The device for preventing fluid from leaking.
Mechanical seal is widely used in petroleum, chemical industry, machinery and aerospace field.It is mainly used for rotating machinery, it is close
The effect of envelope is to prevent the leakage of sealed medium, while extraneous pollutant and impurity being prevented to enter equipment cavity, from
And the intracorporal medium of contaminated equipment chamber.
Conventional machinery sealing structure is as shown in Figure 1, mainly include dynamic (quiet) the ring seat A1 rotated with axis, dynamic at present
(quiet) ring A2, quiet (dynamic) ring A3, quiet (dynamic) ring seat A4 and compensating element, A5.
The mechanism of mechanical seal is as follows: rotating ring and rotating seat use tight fit, rotate with the axis together, and stationary ring and stationary ring
Seat is static element, seals start of run, and rotating ring and stationary ring fit, and there be one layer of micron-sized liquid film in centre, and liquid film is in cavity
The layer fluid film that is formed toward external leakage of medium, when closing force (including the compensation member between two sealing rings (rotating ring and stationary ring)
The spring force of part, pressure of the intracavitary medium to sealing ring) with opening force (contact force including sealing ring, the fluid film of sealing ring
Pressure medium) it is equal when, liquid film reaches stable, and sealing reaches stress balance, sealing also can stable operation, seal fluid at this time
Film is stabilized, and medium will not be toward external leakage.Here it is the dominant mechanisms of sealing.But there is also much ask for mechanical seal at present
Topic, once mechanical rotating ring and stationary ring contacts tension, in rotary course, the abrasion of sealing surface can occur for sealing ring, it will broken
The structure of bad sealing ring, additionally, due to the relative motion of sealing ring, can also generate excessive friction so that whole destroy sealing
Heat causes sealing to generate excessive thermal deformation, destroys liquid film, causes the initial failure of sealing.Current mechanical seal often occurs
The requirement of client is not achieved in dielectric leakage, service life.
Utility model content
The utility model is mainly solving the technical problems that provide a kind of lip shape mechanically-sealing apparatus, using lip packing
Structure type, and the crowning of sealing lip process pumping groove, the medium reversing pump of leakage is sent back, sealing is enhanced
Effect；In addition the frictional heat between seal face is substantially reduced using PTFE (polytetrafluoroethylene (PTFE)) material, reduces the mill of seal face
Damage, prevents temperature from increasing, and the leakage of face opening caused by medium gasifies and shock are damaged.
In order to solve the above technical problems, the technical solution that the utility model uses is: it is close to provide a kind of lip shape machinery
Seal apparatus, including mounting base, compensating element, and two ring bodies, two ring bodies are respectively stationary ring body and rotating ring body, the peace
Dress seat is installed on the shell of equipment to be sealed, and one end of the compensating element, connects the mounting base, and described in other end connection
Stationary ring body, the rotating ring body is placed on the shaft of equipment to be sealed, between the stationary ring body and the both ends of the surface of rotating ring body contact
Form planar end surface sealing；
Also there is at least one of lip shape end face seal and the sealing of lip shape outer peripheral surface, the lip between two ring bodies
Shape end face seal is that the end face of end face seal lip and ring body pushes against to be formed, and the lip shape outer peripheral surface is sealed into outer peripheral surface sealing lip
It pushes against with the outer peripheral surface of the ring body and to be formed；
It is interior for defining close to the side of shaft, and the end face seal lip is from the end face of a ring body to close to another ring body
The lip shape protrusion of direction convex, and the end face of the crowning of the end face seal lip and another ring body pushes against to form the lip shape end
Face sealing, the end face seal lip are located at the end face of ring body and have a circle；
The outer peripheral surface sealing lip is the lip shape protrusion from the periphery of a ring body towards the direction convex close to another ring body,
And the crowning of the outer peripheral surface sealing lip and the outer peripheral surface of another ring body push against to form the lip shape outer peripheral surface sealing, it is described outer
Circumferential surface sealing lip has a circle along the circumferential direction of ring body.
In order to solve the above technical problems, the further technical solution that the utility model uses is: the rotating ring body includes dynamic
Ring and rotating seat, the rotating ring are installed on the rotating seat；
The stationary ring body includes stationary ring and stationary seat, and the stationary ring is installed on the stationary seat, and the one of the compensating element,
The stationary seat is fixed at end, and the other end is fixed on the mounting base；
The planar end surface sealing is formed between the stationary ring and the both ends of the surface of rotating ring contact.
It further says, the crowning of the end face seal lip is equipped with several pumping grooves for decompression；
And/or the crowning of the outer peripheral surface sealing lip is equipped with several pumping grooves for decompression.
It further says, the pumping groove is labyrinth annular groove or reverse acting spiral slot.
It further says, the company of the end face and outer peripheral surface of the end face of the rotating ring and the junction of outer peripheral surface or the stationary ring
It meets place and forms a circle groove, the end face seal lip is set in the groove.
Further say, the end face of the rotating ring has an end face seal lip, the crowning of the end face seal lip with it is described
The end face of stationary ring pushes against to form the lip shape end face seal.
It further says, the outer peripheral surface of the rotating ring has outer peripheral surface sealing lip, the crowning of the outer peripheral surface sealing lip
It pushes against to form the lip shape outer peripheral surface sealing with the outer peripheral surface of the stationary seat.
Further say, the end face of the rotating ring has an end face seal lip, the crowning of the end face seal lip with it is described
The end face of stationary ring pushes against to form the lip shape end face seal, and the outer peripheral surface of the rotating ring has outer peripheral surface sealing lip, the periphery
The outer peripheral surface of the crowning of face sealing lip and the stationary seat pushes against to form the lip shape outer peripheral surface sealing.
It further says, the stationary ring is connected with the stationary seat for integral type or split type connection；
The rotating ring is connected with the rotating seat for integral type or split type connection.
It further says, when the stationary ring has end face seal lip or/and outer peripheral surface sealing lip, the stationary ring is PTFE
Ring；The end face seal lip or/and outer peripheral surface sealing lip are connect with the stationary ring integral type；
When the rotating ring has end face seal lip or/and outer peripheral surface sealing lip, the rotating ring is PTFE ring, and the end
Face sealing lip or/and outer peripheral surface sealing lip are connect with the rotating ring integral type.
The beneficial effects of the utility model are:
The utility model includes mounting base, compensating element, and two ring bodies, forms flush end between the both ends of the surface of ring body contact
Face sealing；Between two ring bodies also there is lip shape end face seal and lip shape outer peripheral surface to seal, therefore at least has between two ring bodies
Two seals, first is that sealing performance is greatly improved, second is that when one of them failure, it is another to play sealing function,
Improve sealing performance；
Furthermore and lip packing is that the end face of sealing lip and ring body or outer peripheral surface are interference fitted, by traditional ring body
Planar end surface is optimized for the novel sealing structure that planar end surface has structure of sealing lip, since sealing lip is relatively thin lip shape protrusion, has
Certain elasticity, therefore sealing lip can deform under contact squeeze effect, sealing lip and ring body end face generate contact pressure,
Extraneous pressure medium can also provide good self sealing action, to play the role of better seal；
Furthermore mechanically-sealing apparatus is many times used for low-temperature working environment, and compensating element, is good easy in cryogenic conditions
Disabling damage loses compensation performance, and the working environment of sealing lip, in compensating element, failure, still can not by low temperature effect
End face or the outer peripheral surface of ring body are enough pushed against, the closing force and opening force between two ring bodies of guarantee are equal, and sealing reaches stress balance,
Sealing effect is good；
Furthermore the ring body in the utility model with sealing lip can use low friction self-lubricating material PTFE, traditional
Mechanical seal ring uses PTFE material frequently with ceramics or metal and alloy material, first is that sealing can be reduced significantly
Frictional heat between ring reduces the abrasion between seal face, to improve sealing performance, reduces leakage, reaches and extend sealing
Service life, the frictional heat energy between seal face greatly reduce, the abrasion of sealing ring also can reduction sharply, therefore can be significantly
Improvement mechanical seal service performance, extend the service life of sealing；Second is that the ring body with sealing lip can be rubbed using low
Fire will not be generated compared to the friction between higher two ring body of two traditional hardness, intensity by wiping self-lubricating material PTFE
Flower, thus it is relatively more to the selection of the material of ring body engaged therewith, it can be metal, ceramics etc., reduce material cost, improve and produce
Product competitiveness；
Furthermore sealing lip can be made of one with a wherein ring body, to be bonded with another ring body, the end face of two ring bodies
Fitting, formation is multiple-sealed, while labyrinth annular groove or reverse acting spiral slot are machined at the crowning of seal lip；Annulus fan
Palace slot can play the role of step pressure reducing labyrinth seal, and the pumping direction of pumping groove is contrary with dielectric leakage, therefore energy
The reversed pumped back cavity of medium that initial stage is leaked can improve the use ability of sealing.
The above description is merely an outline of the technical solution of the present invention, in order to better understand the skill of the utility model
Art means, and can be implemented in accordance with the contents of the specification, below on the preferred embodiment of the present invention and the accompanying drawings in detail
It describes in detail bright as after.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the prior art；
Fig. 2 is the structural schematic diagram of embodiment 1；
Fig. 3 is the partial enlarged view (not setting pumping groove) of Fig. 2；
Fig. 4 is the partial enlarged view (being equipped with pumping groove) of Fig. 2；
Fig. 5 is the structural schematic diagram of embodiment 2；
Fig. 6 is the partial enlarged view of Fig. 5；
Fig. 7 is the structural schematic diagram of embodiment 3；
Fig. 8 is the partial enlarged view of Fig. 7；
Fig. 9 is the structural schematic diagram of embodiment 4；
Each section label is as follows in attached drawing:
Mounting base 1, compensating element, 2, planar end surface sealing 3, lip shape end face seal 4, lip shape outer peripheral surface seal 5, end face seal
Lip 6, outer peripheral surface sealing lip 7, rotating ring 8, rotating seat 9, stationary ring 10, stationary seat 11, pumping groove 12, groove 13 and stationary ring body 14.
Specific embodiment
Illustrate specific embodiment of the present utility model below by way of particular specific embodiment, those skilled in the art can
The advantages of the utility model is understood by content disclosed in the present specification easily and effect.The utility model can also it is other not
Same mode is practiced, that is, under the scope of revealed without departing substantially from the utility model, can give different modification and change.
Embodiment: a kind of lip shape mechanically-sealing apparatus, as shown in Fig. 2 to Fig. 9, including mounting base 1, compensating element, 2 and two
A ring body, two ring bodies are respectively stationary ring body 14 and rotating ring body, and the mounting base is installed on the shell of equipment to be sealed, institute
The one end for stating compensating element, connects the mounting base, and the other end connects the stationary ring body, and the rotating ring body is placed on to be sealed set
Standby shaft forms planar end surface sealing 3 between the stationary ring body and the both ends of the surface of rotating ring body contact；
Also there is at least one of lip shape end face seal 4 and lip shape outer peripheral surface sealing 5 between two ring bodies, it is described
Lip shape end face seal is that the end face of end face seal lip 6 and ring body pushes against to be formed, and it is close that the lip shape outer peripheral surface is sealed into outer peripheral surface
Envelope lip 7 and the outer peripheral surface of the ring body are pushed against and to be formed；
It is interior for defining close to the side of shaft, and the end face seal lip is from the end face of a ring body to close to another ring body
The lip shape protrusion of direction convex, and the end face of the crowning of the end face seal lip and another ring body pushes against and (is interference fitted) shape
At the lip shape end face seal, the end face seal lip is located at the end face of ring body and has a circle；
The outer peripheral surface sealing lip is the lip shape protrusion from the periphery of a ring body towards the direction convex close to another ring body,
And the crowning of the outer peripheral surface sealing lip and the outer peripheral surface of another ring body are pushed against and (are interference fitted) and form the lip shape periphery
Face sealing, the outer peripheral surface sealing lip have a circle along the circumferential direction of ring body.
The rotating ring body includes rotating ring 8 and rotating seat 9, and the rotating ring is installed on the rotating seat；
The stationary ring body includes stationary ring 10 and stationary seat 11, and the stationary ring is installed on the stationary seat, the compensating element,
One end be fixed on the stationary seat, and the other end is fixed on the mounting base；
The planar end surface sealing 3 is formed between the stationary ring and the both ends of the surface of rotating ring contact.
The pumping groove is labyrinth annular groove or reverse acting spiral slot.
The junction of the end face of the rotating ring and the end face and outer peripheral surface of the junction of outer peripheral surface or the stationary ring forms one
Groove 13 is enclosed, the end face seal lip is set in the groove.
Embodiment 1: in the present embodiment, as shown in Fig. 2 to Fig. 4, the end face of the rotating ring has end face seal lip, the end
The end face of the crowning of face sealing lip and the stationary ring pushes against to form the lip shape end face seal.
As shown in figure 4, the crowning of the end face seal lip is equipped with several pumping grooves 12 for decompression；
And/or the crowning of the outer peripheral surface sealing lip is equipped with several pumping grooves 12 for decompression.
The rotating ring is connected with the rotating seat for integral type or split type connection.
When the stationary ring has end face seal lip or/and outer peripheral surface sealing lip, the stationary ring is PTFE ring；The end face
Sealing lip or/and outer peripheral surface sealing lip are connect with the stationary ring integral type；
When the rotating ring has end face seal lip or/and outer peripheral surface sealing lip, the rotating ring is PTFE ring, and the end
Face sealing lip or/and outer peripheral surface sealing lip are connect with the rotating ring integral type.
The compensating element, is spring or metal bellows.
The material of the end face seal lip and the outer peripheral surface sealing lip is the material with toughness, such as PTFE, but
It is without being limited thereto.
Embodiment 2: a kind of lip shape mechanically-sealing apparatus, structure it is similar to Example 1 the difference is that: such as Fig. 5 to Fig. 6
Shown, the outer peripheral surface of the rotating ring has outer peripheral surface sealing lip, crowning and the stationary seat of the outer peripheral surface sealing lip
Outer peripheral surface pushes against to form the lip shape outer peripheral surface sealing.
Embodiment 3: a kind of lip shape mechanically-sealing apparatus, structure it is similar with embodiment the difference is that: such as Fig. 7 to Fig. 8
Shown, the end face of the rotating ring has end face seal lip, and the crowning of the end face seal lip and the end face of the stationary ring push against
The lip shape end face seal is formed, the outer peripheral surface of the rotating ring has outer peripheral surface sealing lip, the protrusion of the outer peripheral surface sealing lip
The outer peripheral surface of face and the stationary seat pushes against to form the lip shape outer peripheral surface sealing.
In the present embodiment, the rotating ring be it is split type, i.e., there are two sub- rotating ring form, one of them is with end face seal
Lip, it is another that there is outer peripheral surface sealing lip.
Embodiment 4: a kind of lip shape mechanically-sealing apparatus, structure it is similar to Example 3 the difference is that: as shown in figure 9,
The stationary ring is that integral type connects with the stationary seat, assembling easy to process, or split type connection.
In above-described embodiment, planar end surface sealing is formed between the both ends of the surface of ring body contact；Also there is lip between two ring bodies
Shape end face seal and the sealing of lip shape outer peripheral surface, therefore at least there are two seals between two ring bodies, first is that greatly improving close
Sealing property, second is that when one of them failure, it is another to play sealing function, improve sealing performance；
Lip packing is that the end face of sealing lip and ring body or outer peripheral surface are interference fitted, and traditional ring body planar end surface is excellent
The novel sealing structure that planar end surface has structure of sealing lip is turned to, since sealing lip is relatively thin lip shape protrusion, there is certain bullet
Property, therefore sealing lip can deform under contact squeeze effect, sealing lip and ring body end face generate contact pressure, extraneous Jie
Matter pressure can also provide good self sealing action, to play the role of better seal；
Mechanically-sealing apparatus is many times used for low-temperature working environment, and compensating element, is in the good easy failure damage of cryogenic conditions
It is bad, compensation performance is lost, and the working environment of sealing lip, in compensating element, failure, can still push against not by low temperature effect
The end face of ring body or outer peripheral surface guarantee that closing force between two ring bodies and opening force are equal, and sealing reaches stress balance, sealing effect
Fruit is good；
Ring body in the utility model with sealing lip can use low friction self-lubricating material PTFE, and traditional machinery is close
Seal ring uses PTFE material frequently with ceramics or metal and alloy material, first is that can significantly reduce between sealing ring
Frictional heat, reduce the abrasion between seal face, to improve sealing performance, reduce leakage, reach extend sealing use the longevity
Life, the frictional heat energy between seal face greatly reduce, the abrasion of sealing ring also can reduction sharply, therefore can greatly improve
The service performance of mechanical seal extends the service life of sealing；Second is that the ring body with sealing lip can be moistened certainly using low friction
Sliding material PTFE will not generate spark, therefore compared to the friction between higher two ring body of two traditional hardness, intensity
It is relatively more to the material selection of ring body engaged therewith, it can be metal, ceramics etc., reduce material cost, improve product competition
Power；
Sealing lip can be made of one with a wherein ring body, to be bonded with another ring body, the end face of two ring bodies is also bonded,
It is formed multiple-sealed, while being machined with labyrinth annular groove or reverse acting spiral slot at the crowning of seal lip；Annulus maze trough
It can play the role of step pressure reducing labyrinth seal, the pumping direction of pumping groove is contrary with dielectric leakage, therefore energy will be first
The reversed pumped back cavity of medium of phase leakage, can improve the use ability of sealing.
The above description is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all
Equivalent structure made based on the specification and figures of the utility model is applied directly or indirectly in other relevant technologies
Field is also included in the patent protection scope of the utility model.
Claims (10)
1. a kind of lip shape mechanically-sealing apparatus, it is characterised in that: including mounting base (1), compensating element, (2) and two ring bodies, two
A ring body is respectively stationary ring body (14) and rotating ring body, and the mounting base is installed on the shell of equipment to be sealed, the compensation
One end of element connects the mounting base, and the other end connects the stationary ring body, and the rotating ring body is placed on turning for equipment to be sealed
Axis forms planar end surface sealing (3) between the stationary ring body and the both ends of the surface of rotating ring body contact；
Also there are at least one of lip shape end face seal (4) and lip shape outer peripheral surface sealing (5) between two ring bodies, it is described
Lip shape end face seal is end face seal lip (6) and the end face of ring body pushes against to be formed, and the lip shape outer peripheral surface is sealed into outer peripheral surface
The outer peripheral surface of sealing lip (7) and the ring body, which pushes against, to be formed；
It is interior for defining close to the side of shaft, and the end face seal lip is from the end face of a ring body to the direction close to another ring body
The lip shape protrusion of convex, and the crowning of the end face seal lip and the end face of another ring body push against that form the lip shape end face close
Envelope, the end face seal lip are located at the end face of ring body and have a circle；
The outer peripheral surface sealing lip is raised for the lip shape from the periphery of a ring body towards the direction convex close to another ring body, and institute
The outer peripheral surface of the crowning and another ring body of stating outer peripheral surface sealing lip pushes against to form the lip shape outer peripheral surface sealing, the outer peripheral surface
Sealing lip has a circle along the circumferential direction of ring body.
2. lip shape mechanically-sealing apparatus according to claim 1, it is characterised in that: the rotating ring body include rotating ring (8) and
Rotating seat (9), the rotating ring are installed on the rotating seat；
The stationary ring body includes stationary ring (10) and stationary seat (11), and the stationary ring is installed on the stationary seat, the compensating element,
One end be fixed on the stationary seat, and the other end is fixed on the mounting base；
The planar end surface sealing (3) is formed between the stationary ring and the both ends of the surface of rotating ring contact.
3. lip shape mechanically-sealing apparatus according to claim 1, it is characterised in that: the crowning of the end face seal lip is set
Have several for decompression pumping groove (12)；
And/or the crowning of the outer peripheral surface sealing lip is equipped with several pumping grooves (12) for decompression.
4. lip shape mechanically-sealing apparatus according to claim 3, it is characterised in that: the pumping groove be labyrinth annular groove or
Reverse acting spiral slot.
5. lip shape mechanically-sealing apparatus according to claim 2, it is characterised in that: the end face of the rotating ring and outer peripheral surface
The junction of the end face and outer peripheral surface of junction or the stationary ring forms circle groove (13), and the end face seal lip is set to described
In groove.
6. lip shape mechanically-sealing apparatus according to claim 2, it is characterised in that: the end face of the rotating ring has end face close
Lip is sealed, the crowning of the end face seal lip and the end face of the stationary ring push against to form the lip shape end face seal.
7. lip shape mechanically-sealing apparatus according to claim 2, it is characterised in that: the outer peripheral surface of the rotating ring has periphery
Face sealing lip, the crowning of the outer peripheral surface sealing lip and the outer peripheral surface of the stationary seat push against that form the lip shape outer peripheral surface close
Envelope.
8. lip shape mechanically-sealing apparatus according to claim 2, it is characterised in that: the end face of the rotating ring has end face close
Lip is sealed, the crowning of the end face seal lip and the end face of the stationary ring push against to form the lip shape end face seal, the rotating ring
Outer peripheral surface have outer peripheral surface sealing lip, the crowning of the outer peripheral surface sealing lip and the outer peripheral surface of the stationary seat push against to be formed
The lip shape outer peripheral surface sealing.
9. lip shape mechanically-sealing apparatus according to claim 2, it is characterised in that: the stationary ring and the stationary seat are one
The connection of body formula or split type connection；
The rotating ring is connected with the rotating seat for integral type or split type connection.
10. lip shape mechanically-sealing apparatus according to claim 2, it is characterised in that: when the stationary ring has end face seal
When lip or/and outer peripheral surface sealing lip, the stationary ring is PTFE ring；The end face seal lip or/and outer peripheral surface sealing lip with it is described
The connection of stationary ring integral type；
When the rotating ring has end face seal lip or/and outer peripheral surface sealing lip, the rotating ring is PTFE ring, and the end face is close
Envelope lip or/and outer peripheral surface sealing lip are connect with the rotating ring integral type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820724380.7U CN208364788U (en) | 2018-05-16 | 2018-05-16 | Lip shape mechanically-sealing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820724380.7U CN208364788U (en) | 2018-05-16 | 2018-05-16 | Lip shape mechanically-sealing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208364788U true CN208364788U (en) | 2019-01-11 |
Family
ID=64934645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820724380.7U Expired - Fee Related CN208364788U (en) | 2018-05-16 | 2018-05-16 | Lip shape mechanically-sealing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208364788U (en) |
-
2018
- 2018-05-16 CN CN201820724380.7U patent/CN208364788U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190111 Termination date: 20210516 |