CN101968117A - Spiral groove end face seal device with transitional groove wall structure - Google Patents
Spiral groove end face seal device with transitional groove wall structure Download PDFInfo
- Publication number
- CN101968117A CN101968117A CN 201010280284 CN201010280284A CN101968117A CN 101968117 A CN101968117 A CN 101968117A CN 201010280284 CN201010280284 CN 201010280284 CN 201010280284 A CN201010280284 A CN 201010280284A CN 101968117 A CN101968117 A CN 101968117A
- Authority
- CN
- China
- Prior art keywords
- spiral chute
- spiral
- face
- seal face
- wall construction
- 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.)
- Granted
Links
Images
Landscapes
- Mechanical Sealing (AREA)
Abstract
The invention provides a spiral groove end face seal device with a transitional groove wall structure, which is arranged between an enclosure and a shaft of a rotary machine and comprises a tubbish shell, wherein the bottom of the shell is provided an open pore; the shaft of a rotary machine penetrates through the pore; a stationary ring is fixedly connected with the shell, provided with a seal end face and comprises a rotary ring; the rotary ring is connected with the shaft, can rotate around the shaft and is provided with a seal end face; the seal end face of the stationary ring is attached to the seal end face of the rotary ring; at least one between the seal end face of the rotary ring and the seal end face of the stationary ring in the fit zone is provided with a group of spiral grooves with transitional groove wall structures; the bottom surfaces of the spiral grooves are parallel to the seal end face and are in smooth transition with the groove wall face; and the transitional groove wall structure refers to that the cross-sectional area of the spiral groove is gradually increased with the increment of groove depth from the bottom surface of the spiral groove. The device of the invention can effectively avoid solid particles from accumulating on the seal end face under the working condition that the solid particles are mixed in the working medium, thereby having a more stable working mode.
Description
Technical field
The invention belongs to the rotation axis seal technical field, particularly a kind of spiral groove end sealer that has the transition slot wall construction, this seal arrangement can be used for the running shaft of rotary machines such as compressor, dilatant, pump, reactor stirrer.
Background technique
The dynamic and static pressing type of known fluid spiral groove end sealer also has deficiency.For example since in its structure He Yan district, groove district adopt steep step-like structure, so mix in fluid-encapsulated solid particle is arranged, might be deposited in the step place of steep cell wall formation.The accumulation of particle can cause the change of links such as end face microscopic appearance, end force distribution, thereby causes the seal arrangement unstable properties.
In the contactless hydrodynamic mechanical seal product of end face shallow trench, most at present cell wall designs of adopting steep form, this class design has directly perceived and generates the stronger characteristics of dynamic pressure effect ability, artificer's basic purpose all is in order to produce as much as possible and to improve dynamic pressure effect between seal face, and is all unacceptable for all behaviors that may cause that dynamic pressure effect reduces.But this series products has all been ignored and inevitably has been mixed with the solid impurity particle in the sealed medium, these impurity particles are piled up at the step place that steep cell wall forms easily, and then the microscopic appearance of change seal face, cause the seal operation state to depart from normal requirement, even lead to the disastrous effect of seal failure.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of spiral groove end sealer that has the transition slot wall construction, this device can be mixed with the phenomenon of effectively avoiding solid particle to pile up under the operating mode of solid particle on seal face in working medium, thereby have more stable working state.
To achieve these goals, the technical solution used in the present invention is:
A kind of spiral chute end that has a transition slot wall construction and seal arrangement, be arranged between the casing and axle 1 of rotating machinery, the housing 2 that comprises tubbiness, housing 2 bottom opening, the axle 1 of rotating machinery passes from the hole, fixedly connected stationary ring 3 on the housing, stationary ring 3 has seal face, also comprise a rotating ring 4, rotating ring 4 is connected on the axle 1 and can rotates around axle 1, rotating ring 4 also has seal face, the seal face of the seal face of stationary ring 3 and rotating ring 4 fits, the seal face of the seal face of rotating ring 4 and stationary ring 3 is provided with one group of spiral chute 5 that has the transition slot wall construction at least one in the fit area, the groove bottom of spiral chute 5 and groove bottom parallel with seal face and trough wall surface seamlessly transit, and described transition slot wall construction is meant that increasing spiral chute 5 section area from the groove bottom of spiral chute 5 with the groove depth height increases gradually.
A kind of in the combined bath that described spiral chute 5 is single-row spiral chute, double spiral groove or spiral chute and other grooveds.
The left and right sides cell wall molded lines of described spiral chute 5 bottom lands is a kind of in log spiral, constant speed helix, skew lines, broken line or the eccentric circular arc line.
The helix angle of described spiral chute 5 can be constant, also can change, and its scope is 0 ° to 90 °.
The trough wall surface of described spiral chute 5 is plane or curved surface.
On described spiral chute 5 circumferential cross-section, cell wall is a transition curve, and the space angle of arbitrary some normal and groove bottom normal is less than 45 ° on this transition curve.
The degree of depth of described spiral chute 5 is constant, also can change, and depth bounds is 0.001--0.5mm.
High pressure side or low voltage side at described spiral chute 5 also have a plane endless belt of not slotting promptly to seal the dam.
The present invention compared with prior art has the following advantages:
Can avoid because the low flow velocity dead angle that Radial Flow between seal face and circumferential flow cause in the vertical walls angle, thereby effectively avoid the solid particle packing phenomenon that causes because of the flow blind angle problem, therefore mix under the operating mode of solid particle at working medium, this invention has more stable performance.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1.
Fig. 2 is the structural representation of the embodiment of the invention 2.
Fig. 3 is the molded lines schematic representation of spiral chute 5 among Fig. 1.
Fig. 4 is the floor map of spiral chute 5 among Fig. 1.
Fig. 5 is the enlarged diagram of the spiral chute 5 among Fig. 4.
Fig. 6 is the floor map of spiral chute 5 in the embodiment of the invention 3.
Fig. 7 is the floor map of spiral chute 5 in the embodiment of the invention 4.
Fig. 8 is the structural representation of the embodiment of the invention 5.
Fig. 9 is the structural representation of the embodiment of the invention 6.
Figure 10 is the floor map of spiral chute 5 among Fig. 9.
Figure 11 is the enlarged diagram of spiral chute 5 among Fig. 9.
Wherein,
The inside radius of the seal face of fitting mutually between R0---rotating ring and the stationary ring;
The inside radius of R1---spiral chute 5;
The outer radius of R2---spiral chute 5;
The outer radius of the seal face of fitting mutually between R3---rotating ring and the stationary ring;
Rb---equilibrium radius;
H---spiral chute 5 degree of depth;
H---high pressure side, i.e. upstream;
L---low voltage side, i.e. downstream;
G---spiral chute 5 pumps draw direction;
α---helix angle;
AB, A " B "---curve;
A ' B '---straight line;
P, P "---the point of contact of curve and circle;
The point of contact of P '---straight line and circle;
C---when spiral chute 5 is on the rotating ring end face, the rotation direction of rotating ring;
D---when spiral chute 5 is on the stationary ring end face, the rotation direction of rotating ring;
UL---the cell wall molded lines on seal face;
DL---the cell wall molded lines on spiral chute 5 bottom surfaces;
1---axle;
2---housing;
3---stationary ring;
4---rotating ring;
5---spiral chute;
6---the sealing dam.
Embodiment
Describe embodiments of the present invention in detail below in conjunction with drawings and Examples.
Embodiment one
As Fig. 1, Fig. 3, Fig. 4 and shown in Figure 5, the present invention includes the housing 2 of tubbiness, housing 2 bottom opening, the axle 1 of rotating machinery passes from the hole, fixedly connected stationary ring 3 on the housing 2, stationary ring 3 has seal face, also comprise a rotating ring 4, rotating ring 4 is connected on the axle 1 and can rotates around axle 1, rotating ring 4 also has seal face, the seal face of the seal face of stationary ring 3 and rotating ring 4 fits, one group of spiral chute 5 that has the transition slot wall construction is set on the seal face of rotating ring 4 in the fit area, the groove bottom of spiral chute 5 and groove bottom parallel with seal face and trough wall surface seamlessly transit, and described transition slot wall construction is meant that increasing spiral chute 5 section area from the groove bottom of spiral chute 5 with the groove depth height increases gradually.
In the present embodiment, the seal face of the seal face of rotating ring 4 and stationary ring 3 is fitted mutually, and the former can rotate relative to the latter, and the faying surface of the two is seal face, the outside of seal face is upstream H for the high pressure side, and the inboard of seal face is downstream L for low voltage side.Spiral chute 5 is set on the seal face of rotating ring 4.Under given rotation direction, spiral chute 5 is with fluid-encapsulated direction pumping downstream from the upstream along arrow G.In addition, in the inboard of spiral chute 5 be low voltage side to also have a plane endless belt be endless belt between R0 and the R1, play throttling and parking sealer, can be referred to as to seal dam 6.
Fig. 3 is the spiral flute type line chart.Spiral chute 5 has the left and right side cell wall, its molded lines on seal face roughly is a helix, and be not the accurate helix of indication on the mathematics, it can be any curve except that concentric circle and radial alignment, helix angle both can be constant, can change again, its scope is 0 ° to 90 °.
Fig. 4 represents to have on the seal face shape and the position of the spiral chute 5 of transition slot wall construction, wherein, the outside of seal face is upstream H for the high pressure side, and the inboard of seal face is downstream L for low voltage side, cell wall molded lines on seal face is UL, is DL at the cell wall molded lines of bottom land.Also have a plane endless belt promptly to seal dam 6 in the inboard of spiral chute 5, be between R1 and the R0, in the present embodiment, the sense of rotation of this ring be C to.
Fig. 5 is the enlarged view of a spiral chute 5 among Fig. 4, has schematically shown the situation of spiral chute 5 side wall surfaces and bottom surface transition especially.Spiral chute 5 side wall surfaces can be the planes, also can be curved surfaces.On spiral chute 5 circumferential cross-section, the transition curve of cell wall can be an arbitrary shape, both can be that straight line also can be a smoothed curve, but the space angle that will guarantee the normal of transition curve and spiral chute 5 bottom surface normals is less than 45 °.
Dotted line among Fig. 4 and Fig. 5 is represented the inside and outside circle of seal face between rotating ring and the stationary ring.Effective radial height of spiral chute 5 is (R3-R1) in Fig. 4 and Fig. 5.
Among the present invention, cell wall molded lines on spiral chute 5 bottom surfaces is identical with the spiral chute of steep form 5 sidewall molded lines, three sidewalls of composition spiral chute 5 are transition slot wall construction form, promptly on the circumferential cross-section of spiral chute 5, cell wall is a transition curve, and the space angle of arbitrary some normal and groove bottom normal is less than 45 ° on this transition curve.Increase spiral chute 5 from spiral chute 5 bottom surfaces with the groove depth height and increase gradually, have the last wealthy narrow down geometrical feature that shrinks gradually at the section area that waits the depths.When fluid-encapsulated when entering spiral chute 5 motion, because the joining place transition of each trough wall surface and bottom surface all is approximate smooth, the flow blind angle that does not exist the structure angle to suddenly change and cause, thereby the solid particle that is mingled in the fluid is difficult for being deposited in the spiral chute 5.
Embodiment two
Present embodiment and embodiment's one difference only is that spiral chute 5 is arranged on the seal face of stationary ring, as shown in Figure 2.Herein the sense of rotation of the rotating ring 4 relative with spiral chute 5 be D to, as shown in Figure 4.
Embodiment three
Present embodiment and embodiment's one difference only is on the seal face of the seal face of stationary ring 3 and rotating ring 4 spiral chute 5 to be set all, and the spiral chute 5 on both is the state of " face-to-face " after applying.
Embodiment four
Present embodiment is identical with embodiment one, two, three structure, and difference is the variation of spiral chute 5 on the seal face, and spiral chute 5 is the circular grooves and the single-row spiral fluted combination that has the transition slot wall construction that have the transition slot wall construction in this example, as shown in Figure 6.
Embodiment five
Present embodiment is identical with embodiment one, two, three structure, and difference is the variation of spiral chute 5 on the seal face, and spiral chute 5 is the circular grooves and the combination that has the double spiral groove of transition slot wall construction that have the transition slot wall construction in this example, as shown in Figure 7.
Embodiment six
As Fig. 8, Figure 10 and shown in Figure 11, the difference of present embodiment and embodiment's one structure only is that the inboard of seal face among this embodiment is upstream H ' for the high pressure side, and its outside is downstream L ' for low voltage side.Spiral chute 5 is set on the seal face of rotating ring.Under given rotation direction, spiral chute 5 with fluid-encapsulated along arrow G ' direction pumping downstream from the upstream.In addition, also have a plane endless belt in the inboard of spiral chute 5, the endless belt that promptly is between R4 and the R5 promptly seals dam 6, as shown in Figure 8.
Figure 10 represents the shape and the position of spiral chute 5 on the seal face.Effective radial height of spiral chute 5 is (R5-R7) in the figure.Dotted line is represented the inside and outside circle of the seal face that fits between rotating ring 4 and the stationary ring 3 among Figure 10 and Figure 11.On seal face with at spiral chute 5 molded lines of bottom land be corresponding with rotating ring 4 flutings in Figure 10 and Figure 11, the rotation direction of this moment is C '; Cell wall molded lines at bottom land is identical with the spiral chute 5 cell wall molded lines of steep form, three sidewalls of composition spiral chute 5 are transition slot wall construction form, promptly on spiral chute 5 circumferential cross-section, cell wall is a transition curve, and the space angle of arbitrary some normal and groove bottom normal is less than 45 ° on this transition curve.Increase spiral chute 5 from spiral chute 5 bottom surfaces with the groove depth height and increase gradually at the section area that waits the depths, the three-dimensional of formation " last wealthy narrow down " is the convergent helical groove structure gradually.
Figure 11 is the enlarged view of a spiral chute 5 among Figure 10, has schematically shown the situation of change of the slow transition of spiral chute 5 cell walls especially.Spiral chute 5 side wall surfaces can be the planes, also can be curved surfaces.On spiral chute 5 circumferential cross-section, the transition curve of cell wall can be an arbitrary shape, both can be that straight line also can be a curve, but the space angle that will guarantee the normal of transition curve and spiral chute 5 bottom surface normals is less than 45 °.
Embodiment seven
The difference of present embodiment and embodiment's four structures only is that spiral chute 5 is arranged on the seal face of stationary ring 3, as shown in Figure 9.
Among the present invention, identical with the spiral chute 5 cell wall molded lines of steep form at the cell wall molded lines of bottom land; Each side wall surface of forming spiral chute 5 can be that the plane also can be a curved surface; On spiral chute 5 circumferential cross-section, cell wall is a transition curve, and the space angle of arbitrary some normal and groove bottom normal is less than 45 ° on this transition curve; The spiral chute of being made up of such cell wall 5 has the characteristics of " last wealthy narrow down " in the groove depth direction, can effectively reduce fluid-encapsulated in solid particle polluter the possibility of accumulation takes place in the angle of wall and bottom surface, help seal arrangement and under the fluid-encapsulated condition that is mixed with the solid impurity particle, more stably work.
Implement sealing total arrangement of the present invention various ways can be arranged: single sealing, face-to-face formula double-sealing, double-sealing, two-stage series connection sealing, three grades of series seals, double-sealings of formula seal combined sealing etc. with the combined or single sealing of single sealing with two-stage series connection back-to-back.
As described in the background art, for a long time, the technician exists so a kind of technology prejudice, think that the dynamic pressure effect between seal face is the bigger the better, it is unacceptable that any structure that may cause the dynamic pressure effect between seal face to reduce all is considered, therefore most artificers have ignored and have inevitably contained the solid impurity particle in the sealed medium, though perhaps recognize the impurity particle of existence, but be difficult to expect exchanging for the working stability of sealing with a spot of dynamic pressure effect of loss.And among the present invention, though adopt the spiral chute 5 of band transition slot wall construction can cause the dynamic pressure effect between seal face that less loss is arranged, but can effectively reduce and avoid the solid impurity particle that the possibility of piling up takes place in conduit, thereby improved the stability of seal operation, obtain beyond thought technical result, also overcome the technology prejudice that exists for a long time simultaneously.And show that in the result of experiment detection and theoretical calculation the dynamic pressure effect loss that therefore causes does not cause substantial influence to the overall work of seal arrangement.
Claims (8)
1. spiral groove end sealer that has the transition slot wall construction, be arranged between the casing and axle (1) of rotating machinery, the housing (2) that comprises tubbiness, housing (2) bottom opening, the axle of rotating machinery (1) passes from the hole, housing (2) is gone up fixedly connected stationary ring (3), stationary ring (3) has seal face, also comprise a rotating ring (4), rotating ring (4) is connected axle (1) and goes up and can rotate around axle (1), rotating ring (4) also has seal face, the seal face of the seal face of stationary ring (3) and rotating ring (4) fits, it is characterized in that: the seal face of the seal face of rotating ring in the fit area (4) and stationary ring (3) is provided with one group of spiral chute (5) that has the transition slot wall construction at least one, the groove bottom of spiral chute (5) and groove bottom parallel with seal face and trough wall surface seamlessly transit, and described transition slot wall construction is meant that increasing spiral chute (5) section area from the groove bottom of spiral chute (5) with the groove depth height increases gradually.
2. a kind of spiral groove end sealer that has the transition slot wall construction according to claim 1 is characterized in that, described spiral chute (5) is a kind of in the combined bath of single-row spiral chute, double spiral groove or spiral chute and other grooveds.
3. a kind of spiral groove end sealer that has the transition slot wall construction according to claim 1, it is characterized in that the left and right sides cell wall molded lines of described spiral chute (5) bottom land is a kind of in log spiral, constant speed helix, skew lines, broken line or the eccentric circular arc line.
4. a kind of spiral groove end sealer that has the transition slot wall construction according to claim 1 is characterized in that the helix angle of described spiral chute (5) can be constant, also can change, and its scope is 0 ° to 90 °.
5. a kind of spiral groove end sealer that has the transition slot wall construction according to claim 1 is characterized in that the trough wall surface of described spiral chute (5) is plane or curved surface.
6. a kind of spiral groove end sealer that has the transition slot wall construction according to claim 1, it is characterized in that, on described spiral chute (5) circumferential cross-section, cell wall is a transition curve, and the space angle of arbitrary some normal and groove bottom normal is less than 45 ° on this transition curve.
7. a kind of spiral groove end sealer that has the transition slot wall construction according to claim 1 is characterized in that the degree of depth of described spiral chute (5) is constant, also can change, and depth bounds is 0.001-0.5mm.
8. a kind of spiral groove end sealer that has the transition slot wall construction according to claim 1 is characterized in that, also has a plane endless belt of not slotting promptly to seal dam (6) in the high pressure side or the low voltage side of described spiral chute (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010280284A CN101968117B (en) | 2010-09-13 | 2010-09-13 | Spiral groove end face seal device with transitional groove wall structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010280284A CN101968117B (en) | 2010-09-13 | 2010-09-13 | Spiral groove end face seal device with transitional groove wall structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101968117A true CN101968117A (en) | 2011-02-09 |
| CN101968117B CN101968117B (en) | 2012-10-24 |
Family
ID=43547319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010280284A Active CN101968117B (en) | 2010-09-13 | 2010-09-13 | Spiral groove end face seal device with transitional groove wall structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101968117B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103133696A (en) * | 2013-02-22 | 2013-06-05 | 江苏大学 | Dynamic pressure mechanical sealing ring for automatically draining particle type fluids |
| CN104896099A (en) * | 2015-05-25 | 2015-09-09 | 浙江工业大学 | Gas lubrication cluster spiral groove end face mechanical sealing structure |
| CN110566794A (en) * | 2019-09-09 | 2019-12-13 | 珠海格力节能环保制冷技术研究中心有限公司 | Lubricating structure and mechanical lubricating device with same |
| CN117366002A (en) * | 2023-11-13 | 2024-01-09 | 烟台东德实业有限公司 | High-pressure air seal waterproof method for worm end of high-speed centrifugal compressor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106812947B (en) * | 2017-02-14 | 2018-11-27 | 四川日机密封件股份有限公司 | The non-contacting mechanical seal ring of combined fluid dynamic pressure groove |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0369295A1 (en) * | 1988-11-18 | 1990-05-23 | Feodor Burgmann Dichtungswerke GmbH & Co. | Sliding annular seal |
| EP0935086A2 (en) * | 1998-02-06 | 1999-08-11 | John Crane Inc. | Gas lubricated slow speed seal |
| WO2000034697A1 (en) * | 1998-12-10 | 2000-06-15 | 'anga' Uszczelnienia Mechaniczne Spółka Z.O.O. | Non-contacting face seals |
| CN1415877A (en) * | 2002-11-07 | 2003-05-07 | 天津新技术产业园区鼎名密封有限公司 | Unit for sealing end surface of 3D helical flute with double helix angles |
| CN201306445Y (en) * | 2008-10-16 | 2009-09-09 | 东营海森密封技术有限责任公司 | Liquid film lubrication double end surface non-contact mechanical seal device |
| CN201818792U (en) * | 2010-09-13 | 2011-05-04 | 清华大学 | End surface sealing device |
-
2010
- 2010-09-13 CN CN201010280284A patent/CN101968117B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0369295A1 (en) * | 1988-11-18 | 1990-05-23 | Feodor Burgmann Dichtungswerke GmbH & Co. | Sliding annular seal |
| EP0935086A2 (en) * | 1998-02-06 | 1999-08-11 | John Crane Inc. | Gas lubricated slow speed seal |
| WO2000034697A1 (en) * | 1998-12-10 | 2000-06-15 | 'anga' Uszczelnienia Mechaniczne Spółka Z.O.O. | Non-contacting face seals |
| CN1415877A (en) * | 2002-11-07 | 2003-05-07 | 天津新技术产业园区鼎名密封有限公司 | Unit for sealing end surface of 3D helical flute with double helix angles |
| CN201306445Y (en) * | 2008-10-16 | 2009-09-09 | 东营海森密封技术有限责任公司 | Liquid film lubrication double end surface non-contact mechanical seal device |
| CN201818792U (en) * | 2010-09-13 | 2011-05-04 | 清华大学 | End surface sealing device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103133696A (en) * | 2013-02-22 | 2013-06-05 | 江苏大学 | Dynamic pressure mechanical sealing ring for automatically draining particle type fluids |
| CN104896099A (en) * | 2015-05-25 | 2015-09-09 | 浙江工业大学 | Gas lubrication cluster spiral groove end face mechanical sealing structure |
| CN110566794A (en) * | 2019-09-09 | 2019-12-13 | 珠海格力节能环保制冷技术研究中心有限公司 | Lubricating structure and mechanical lubricating device with same |
| CN110566794B (en) * | 2019-09-09 | 2020-12-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Lubricating structure and mechanical lubricating device with same |
| CN117366002A (en) * | 2023-11-13 | 2024-01-09 | 烟台东德实业有限公司 | High-pressure air seal waterproof method for worm end of high-speed centrifugal compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101968117B (en) | 2012-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101968117B (en) | Spiral groove end face seal device with transitional groove wall structure | |
| CN101793324B (en) | Hydrodynamic mechanical seal structure for three-dimensional fish scale-like texture bottom surface type groove | |
| US9611938B1 (en) | Sliding component | |
| CN201496542U (en) | Three-dimensional fish scale-constructed underside-type trough fluid dynamic-pressure type liquid mechanical sealing structure | |
| CN101644333B (en) | Gas end surface sealing structure with three-dimensional feather-like textured bottom shaped grooves | |
| CN202327105U (en) | Mechanical sealing device for fixed taper type waveform curved surface | |
| CN101975274B (en) | Self-sealed zero leakage hydrophobic molded surface mechanical sealing end face structure | |
| CN104321568B (en) | Slide part | |
| CN205877198U (en) | Mechanical seal ring with oval groove | |
| CN202327104U (en) | Variable taper type wave-shaped curved surface mechanical seal device | |
| CN101893092A (en) | Bilaterally rotary gas lubrication non-contact mechanical seal device | |
| CN102927287A (en) | Mechanical end face seal with combined fluid slot structure | |
| CN201818792U (en) | End surface sealing device | |
| CN102359596A (en) | Seal structure with unidirectionally-rotatable three-dimensional L-shaped groove end face | |
| CN101672366B (en) | Tilting directional microporous end surface mechanical sealing structure | |
| CN103470762A (en) | Inclined gradually varied porous end surface non-contact type mechanical sealing structure | |
| CN104989821A (en) | Mechanical seal with shallow slots | |
| CN105041709A (en) | Fluid dynamic pressure type mechanical seal used for nuclear main pump and mechanical seal system of nuclear main pump | |
| CN203939991U (en) | Dark link chute dynamic pressure type end surface mechanical sealing structure | |
| CN201771741U (en) | Mechanical seal device for high speed pump | |
| CN104930193A (en) | Sealing ring | |
| CN106015580A (en) | Dynamic and static pressure type columnar micro-bulge waviness distribution mechanical seal structure | |
| CN203051777U (en) | Mechanical face seal with combined fluid groove structure | |
| CN105402411A (en) | Sealing ring and mechanical sealing device with same | |
| CN105202190A (en) | Shallow slot mechanical seal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |