CN111828644B - Combined sealing device - Google Patents
Combined sealing device Download PDFInfo
- Publication number
- CN111828644B CN111828644B CN202010801483.0A CN202010801483A CN111828644B CN 111828644 B CN111828644 B CN 111828644B CN 202010801483 A CN202010801483 A CN 202010801483A CN 111828644 B CN111828644 B CN 111828644B
- Authority
- CN
- China
- Prior art keywords
- sealing ring
- sealing
- rotating shaft
- cavity
- fabric
- 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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Links
- 238000007789 sealing Methods 0.000 title claims abstract description 249
- 239000004744 fabric Substances 0.000 claims abstract description 38
- 239000002184 metal Substances 0.000 claims abstract description 38
- 239000012530 fluid Substances 0.000 claims abstract description 37
- 238000005086 pumping Methods 0.000 claims abstract description 18
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 230000003068 static effect Effects 0.000 claims description 16
- 230000007423 decrease Effects 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 239000007787 solid Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
Classifications
-
- 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
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
-
- 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
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
- F16J15/20—Packing materials therefor
- F16J15/22—Packing materials therefor shaped as strands, ropes, threads, ribbons, or the like
-
- 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
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
- F16J15/406—Sealings between relatively-moving surfaces by means of fluid by at least one pump
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses a combined sealing device which is used for shaft sealing of rotary machinery and comprises a fabric sealing ring, a dynamic pressure pumping sealing assembly, an inflatable sealing ring and a circumferentially telescopic metal sealing ring arranged in the inflatable sealing ring; the fabric sealing ring filters solid impurities in the fluid, and the diameter of the fabric sealing ring is larger than that of the rotating shaft and can rotate along with the rotating shaft; the depth of the spiral groove of the dynamic pressure pumping sealing assembly is linearly and continuously reduced along the track of the spiral groove from the side of the sealing ring sheet close to the sealing auxiliary lip to the side of the sealing ring sheet close to the bearing; the circumferential expansion of the metal sealing ring is indirectly controlled by controlling the inflation amount of the inner cavity of the elastic inflatable sealing ring. The fabric sealing ring, the dynamic pressure pumping sealing assembly, the air expansion sealing ring and the metal sealing ring cooperate with each other to realize stable sealing of pressure fluid in the cavity, and particularly pressure fluctuation is generated in the cavity, when the instantaneous pressure is overlarge, the sealing adaptability is strong, and the sealing device has long service life.
Description
Technical Field
The invention relates to the field of sealing, in particular to a combined sealing device for shaft sealing of rotary machinery.
Background
The lip-shaped sealing ring for the rotating shaft is used for sealing pressure fluid in a cavity, and has the advantages of small volume, convenient installation, good sealing effect, good adaptability and the like, and is widely used on internal combustion engines, machine tools, hydraulic systems and pump equipment.
When the rotary shaft rotates, pressure fluid in the cavity can generate pressure fluctuation in a working state of the device, the pressure difference between high pressure and low pressure of instantaneous pressure is large, and when the instantaneous pressure is too large, the stability of a sealing system can be damaged, so that leakage is caused; moreover, solid particle impurities are inevitably present in the fluid in the cavity, so that the sealing contact surfaces are worn, the service life is influenced, leakage gaps are generated between the sealing contact surfaces, and the sealing effect is damaged; still another point is that the static sealing problem in the non-working state of the equipment is not solved well in the prior art when the rotating shaft stops rotating; the sealing state cannot be adjusted adaptively along with the change of working conditions, and the sealing adaptability is insufficient; these are technical problems that the art is urgent to solve.
Disclosure of Invention
The invention aims to provide a combined sealing device which aims to solve the technical problems in the background technology. In order to achieve the above purpose, the present invention provides the following technical solutions:
a combination seal for sealing a pressurized fluid on a mechanical device having a rotating shaft, an outer housing, and a bearing mounted in the outer housing, wherein the outer housing has an intermediate rib; a cavity is formed in the left end of the outer shell and is used for accommodating pressure fluid; the right end sealing connection of shell body has the end cover, the right-hand member sealing connection of end cover has the clamp plate.
The part of the middle rib, which is radially close to the rotating shaft, is provided with a mounting groove, and a fabric sealing ring is arranged in the mounting groove; the diameter of the inner circumference of the fabric sealing ring is 1.1-1.35 times of the diameter of the rotating shaft, and the outer diameter of the fabric sealing ring is 0.8-0.95 times of the diameter of the circumference of the mounting groove; when the rotating shaft rotates, a part of the inner circumferential surface of the fabric sealing ring is in contact with the outer circumferential surface of the rotating shaft, the fabric sealing ring is driven by the rotating shaft to rotate, and the rotating speed of the fabric sealing ring is smaller than the rotating speed of the rotating shaft.
The dynamic pressure pumping sealing assembly is provided with a sealing auxiliary lip, a main sealing lip, a metal keel and a locking spring, wherein the main sealing lip is fixedly provided with a sealing ring piece made of polytetrafluoroethylene, and a spiral groove is processed on the outer circumferential surface of the rotating shaft corresponding to the sealing ring piece and used for pumping pressure fluid back to the cavity; wherein the depth of the spiral groove decreases linearly and continuously from the side of the seal ring sheet near the seal auxiliary lip to the side of the seal ring sheet near the bearing in the track direction along the spiral groove.
The inflatable sealing ring is L-shaped, the inflatable sealing ring and the pressing plate realize static sealing in the radial direction, the inflatable sealing ring is connected with an air inlet and outlet control device through an air pipe, the air quantity in the inner cavity of the inflatable sealing ring is controlled through the air inlet and outlet control device, the expansion degree of the inflatable sealing ring is further controlled, and the sealing pressure of the inflatable sealing ring in the axial direction and the radial direction is further controlled; the axial inner circumference part of the inflatable sealing ring is provided with a groove, and a metal sealing ring which can stretch and retract in the circumferential direction is arranged in the groove; the metal sealing ring can stretch and retract along the circumferential direction along with the change of the expansion degree of the inflatable sealing ring, and the tail ends of the metal sealing ring are partially overlapped in the circumferential direction.
The metal sealing ring is an elastic alloy material which has good wear resistance, small friction coefficient and difficult thermal expansion.
In a non-working state that the rotating shaft is static, the sealing ring piece is attached to the circumferential surface of the rotating shaft by the locking force of the locking spring to realize static sealing; when the rotating shaft rotates, the sealing ring piece is subjected to hydrodynamic pressure to realize non-contact with the circumferential surface of the rotating shaft, a fluid film seal is formed between the sealing ring piece and the circumferential surface of the rotating shaft, and fluid is pumped back to the cavity through the spiral groove.
The air inlet and outlet control device is connected to a pressure air source. One part of the metal sealing ring is arranged in the groove of the inflatable sealing ring in the radial thickness direction, and the other part of the metal sealing ring is arranged outside the groove of the inflatable sealing ring, so that the metal sealing ring cannot rotate along with the rotating shaft when the rotating shaft rotates.
Compared with the prior art, the invention has the beneficial effects that:
1. the fabric structure of the fabric sealing ring is utilized to filter solid impurities in fluid in the cavity, and the pressure reducing effect is achieved, so that the sealing pressure of a subsequent sealing piece is reduced; through the design to the size of fabric sealing washer, make when the rotation axis rotates, only a part of the inner circumference of fabric sealing washer and the outer circumference contact of rotation axis to the fabric sealing washer can carry out the rotation of certain speed under the drive of rotation axis, has reduced the wearing and tearing to the fabric sealing washer to a great extent, guarantees life.
2. The sealing auxiliary lip side is utilized to further seal the fluid, so that the sealing pressure is reduced, and the dynamic pressure sealing and pumping action of the sealing ring piece and the rotating shaft are utilized to reduce the leakage loss of the fluid; the depth of the spiral groove linearly and continuously decreases from the side of the sealing ring sheet close to the sealing auxiliary lip to the side of the sealing ring sheet close to the bearing along the track of the spiral groove; the sum of the cross-sectional areas of the thread grooves can be reduced, further dynamic pressure sealing the rigidity and stability of the membrane, while improving the ability to pump fluid.
3. The combination of the L-shaped elastic air-expanding sealing ring and the metal sealing ring realizes axial and radial bidirectional sealing; according to the pressure of fluid in the cavity and the rotating speed of the rotating shaft, the inner cavity of the elastic air-inflated sealing ring is inflated by controlling the inflation amount of the inner cavity of the elastic air-inflated sealing ring so as to radially seal the strength, the circumferential expansion of the metal sealing ring is indirectly controlled, the force of the metal sealing ring tightly attached to the rotating shaft is tightly attached to the rotating shaft, and the strength of axial sealing is ensured; and the elastic air-expanding sealing ring can also realize static sealing in a static non-working state of the rotating shaft and dynamic sealing in a rotating working state of the rotating shaft, so that fluid in the cavity is prevented from leaking and external impurities are prevented from entering the cavity.
The fabric sealing ring, the dynamic pressure pumping sealing assembly, the air expansion sealing ring and the metal sealing ring cooperate with each other, so that the sealing of pressure fluid in the cavity is realized, the stability of the sealing performance is guaranteed, the pressure fluctuation is generated under different working conditions, particularly in the cavity, when the instantaneous pressure is overlarge, the sealing adaptability is strong, and the sealing device has long service life.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following description of the embodiments will briefly describe the drawings that are required to be used in the description:
FIG. 1 is a schematic view of the assembly of the combination seal of the present invention;
fig. 2 shows the positional relationship between the fabric seal ring 2 and the rotary shaft 1 of the combined seal device of the present invention.
Fig. 3 is a schematic view of the end overlap of the circumferentially telescoping metal seal ring 13.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
A combined sealing device for sealing a pressurized fluid on a mechanical device having a rotation axis, as shown in fig. 1, having a rotation axis 1, an outer housing 3 and a bearing 14 mounted in the outer housing 3, wherein the outer housing 3 has an intermediate rib 4; a cavity is formed in the left end of the outer shell 3 and is used for containing pressure fluid; the right end sealing connection of shell body 3 has end cover 8, the right-hand member sealing connection of end cover 8 has clamp plate 9.
The part of the middle rib 4, which is radially close to the rotating shaft 1, is provided with a mounting groove, and a fabric sealing ring 2 is arranged in the mounting groove; the diameter of the inner circumference of the fabric sealing ring 2 is 1.1-1.35 times of the diameter of the rotating shaft 1, and the outer diameter of the fabric sealing ring 2 is 0.8-0.95 times of the diameter of the circumference of the mounting groove; when the rotary shaft 1 rotates, a part of the inner circumferential surface of the fabric sealing ring 2 is in contact with the outer circumferential surface of the rotary shaft 1 (as shown in fig. 2), and the fabric sealing ring 2 rotates under the drive of the rotary shaft 1, and the rotating speed of the fabric sealing ring 2 is smaller than the rotating speed of the rotary shaft 1.
The dynamic pressure pumping sealing assembly 5 is arranged, the outer circumferential surface of the dynamic pressure pumping sealing assembly 5 is fixed with the inner circumferential wall surface of the outer shell 3 in a sealing way, the dynamic pressure pumping sealing assembly 5 is provided with a sealing auxiliary lip 18, a main sealing lip, a metal keel 6 and a locking spring 15, a sealing ring piece 17 made of polytetrafluoroethylene is fixed on the main sealing lip, and a spiral groove 16 is processed on the outer circumferential surface of the rotating shaft 1 corresponding to the sealing ring piece 17 and used for pumping pressure fluid back to the cavity; wherein the depth of the spiral groove 16 decreases linearly and continuously from the side of the seal ring piece 17 near the seal sub lip 18 to the side of the seal ring piece 17 near the bearing in the track direction along the spiral groove 16.
The inflatable sealing ring 12 is in an L shape, the inflatable sealing ring 12 and the pressing plate 9 realize static sealing in the radial direction, the inflatable sealing ring 12 is connected with the air inlet and outlet control device 10 through an air pipe, the air quantity in the inner cavity of the inflatable sealing ring 12 is controlled through the air inlet and outlet control device 10, the expansion degree of the inflatable sealing ring 12 is further controlled, and the sealing pressure of the inflatable sealing ring 12 in the axial direction and the radial direction is further controlled; the axial inner circumferential part of the inflatable sealing ring 12 is provided with a groove, and a metal sealing ring 13 which can be extended and contracted in the circumferential direction is arranged in the groove; the metal sealing ring 13 can expand and contract along the circumferential direction along with the expansion degree of the inflatable sealing ring 12, and the tail ends of the metal sealing ring 13 are partially overlapped in the circumferential direction (as shown in fig. 3).
The metal seal ring 13 is an elastic alloy material with good wear resistance, small friction coefficient and difficult thermal expansion.
In the non-working state of the rotating shaft 1 in a static state, the sealing ring piece 17 is jointed with the circumferential surface of the rotating shaft by the locking force of the locking spring 15 to realize static sealing; when the rotating shaft 1 rotates, the sealing ring piece 17 is subjected to hydrodynamic pressure to realize non-contact with the circumferential surface of the rotating shaft, a fluid film seal is formed between the sealing ring piece and the circumferential surface of the rotating shaft 1, and fluid is pumped back to the cavity through the spiral groove 16. The intake and exhaust control device 10 is connected to a pressurized air source (not shown).
The metal sealing ring 13 is partially arranged in the groove of the inflatable sealing ring 12 in the radial thickness direction, and the other part is arranged outside the groove of the inflatable sealing ring, so that the metal sealing ring cannot rotate along with the rotating shaft 1 when the rotating shaft 1 rotates.
The invention utilizes the fabric structure of the fabric sealing ring, can filter solid impurities in fluid in the cavity, has the function of reducing pressure, and reduces the sealing pressure of the subsequent sealing piece; through the design to the size of fabric sealing washer, make when the rotation axis rotates, only a part of the inner circumference of fabric sealing washer and the outer circumference contact of rotation axis to the fabric sealing washer can carry out the rotation of certain speed under the drive of rotation axis, has reduced the wearing and tearing to the fabric sealing washer to a great extent, guarantees life.
According to the invention, the sealing auxiliary lip side is utilized to further seal the fluid, so that the sealing pressure is reduced, and the dynamic pressure sealing and pumping action of the sealing ring piece and the rotating shaft are utilized to reduce the leakage loss of the fluid; the depth of the spiral groove linearly and continuously decreases from the side of the sealing ring sheet close to the sealing auxiliary lip to the side of the sealing ring sheet close to the bearing along the track of the spiral groove; the sum of the cross-sectional areas of the thread grooves can be reduced, further dynamic pressure sealing the rigidity and stability of the membrane, while improving the ability to pump fluid.
The invention realizes axial and radial bidirectional sealing by utilizing the combination of the L-shaped elastic air-expanding sealing ring and the metal sealing ring; according to the pressure of fluid in the cavity and the rotating speed of the rotating shaft, the inner cavity of the elastic air-inflated sealing ring is inflated by controlling the inflation amount of the inner cavity of the elastic air-inflated sealing ring so as to radially seal the strength, the circumferential expansion of the metal sealing ring is indirectly controlled, the force of the metal sealing ring tightly attached to the rotating shaft is tightly attached to the rotating shaft, and the strength of axial sealing is ensured; and the elastic air-expanding sealing ring can also realize static sealing in a static non-working state of the rotating shaft and dynamic sealing in a rotating working state of the rotating shaft, so that fluid in the cavity is prevented from leaking and external impurities are prevented from entering the cavity.
And the fabric sealing ring, the dynamic pressure pumping sealing assembly, the air expansion sealing ring and the metal sealing ring cooperate with each other, so that the sealing of pressure fluid in the cavity is realized together, the stability of the sealing performance is ensured, the pressure fluctuation is generated under different working conditions, particularly in the cavity, when the instantaneous pressure is overlarge, the sealing adaptability is strong, and the service life of the sealing device is long.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (1)
1. A combined sealing device for sealing a pressurized fluid on a mechanical device having a rotary shaft (1), having an outer housing (3) and a bearing (14) mounted in the outer housing (3), wherein the outer housing (3) has an intermediate rib (4); a cavity is formed in the left end of the outer shell (3) and is used for containing pressure fluid; the right end of the outer shell (3) is connected with an end cover (8) in a sealing way, and the right end of the end cover (8) is connected with a pressing plate (9) in a sealing way;
the method is characterized in that:
the part of the middle rib (4) radially close to the rotating shaft (1) is provided with a mounting groove, and a fabric sealing ring (2) is arranged in the mounting groove; the diameter of the inner circumference of the fabric sealing ring (2) is 1.1-1.35 times of the diameter of the rotating shaft (1), and the outer diameter of the fabric sealing ring (2) is 0.8-0.95 times of the diameter of the circumference of the mounting groove; when the rotating shaft (1) rotates, a part of the inner circumferential surface of the fabric sealing ring (2) is in contact with the outer circumferential surface of the rotating shaft (1), the fabric sealing ring (2) is driven by the rotating shaft (1) to rotate, and the rotating speed of the fabric sealing ring (2) is smaller than the rotating speed of the rotating shaft (1);
the dynamic pressure pumping sealing assembly (5) is arranged, the outer circumferential surface of the dynamic pressure pumping sealing assembly (5) is fixed with the inner circumferential wall surface of the outer shell (3) in a sealing way, the dynamic pressure pumping sealing assembly (5) is provided with a sealing auxiliary lip (18), a main sealing lip, a metal keel (6) and a locking spring (15), a sealing ring piece (17) made of polytetrafluoroethylene is fixed on the main sealing lip, and a spiral groove (16) is formed in the outer circumferential surface of the rotating shaft (1) corresponding to the sealing ring piece (17) and used for pumping pressure fluid back to the cavity; wherein the depth of the spiral groove (16) decreases linearly and continuously from the side of the sealing ring piece (17) close to the sealing auxiliary lip (18) to the side of the sealing ring piece (17) close to the bearing in the track direction along the spiral groove (16); the inflatable sealing ring (12) is elastic, the inflatable sealing ring (12) is L-shaped, the inflatable sealing ring (12) and the pressing plate (9) realize static sealing in the radial direction, the inflatable sealing ring (12) is connected with the air inlet and outlet control device (10) through an air pipe, the air quantity in the inner cavity of the inflatable sealing ring (12) is controlled through the air inlet and outlet control device (10), the expansion degree of the inflatable sealing ring (12) is further controlled, and the sealing pressure of the inflatable sealing ring (12) in the axial direction and the radial direction is further controlled; the axial inner circumferential part of the air-expanding sealing ring (12) is provided with a groove, and a metal sealing ring (13) which can stretch and retract in the circumferential direction is arranged in the groove; the metal sealing ring (13) can stretch and retract in the circumferential direction along with the change of the expansion degree of the inflatable sealing ring (12), and the tail ends of the metal sealing ring (13) are partially overlapped in the circumferential direction; in a non-working state of the rotating shaft (1) in a static state, the sealing ring piece (17) is jointed with the circumferential surface of the rotating shaft by the locking force of the locking spring (15) to realize static sealing; when the rotating shaft (1) rotates, the sealing ring piece (17) is subjected to hydrodynamic pressure to realize non-contact with the circumferential surface of the rotating shaft, a fluid film seal is formed between the sealing ring piece and the circumferential surface of the rotating shaft (1), and fluid is pumped back to the cavity through the spiral groove (16); one part of the metal sealing ring (13) is arranged in a groove of the inflatable sealing ring (12) in the radial thickness direction, and the other part of the metal sealing ring is arranged outside the groove of the inflatable sealing ring, and when the rotating shaft (1) rotates, the metal sealing ring cannot rotate along with the rotating shaft (1); the combination of the L-shaped elastic air-inflated sealing ring and the metal sealing ring is utilized to realize axial and radial bidirectional sealing, the air inflation amount in the inner cavity of the elastic air-inflated sealing ring is controlled to expand according to the pressure of fluid in the cavity and the rotating speed of the rotating shaft so as to control the strength of radial sealing, the circumferential expansion of the metal sealing ring is indirectly controlled, the strength of the axial sealing is ensured by the strength of the sealing ring tightly attached to the rotating shaft, the static sealing of the rotating shaft in a static non-working state and the dynamic sealing of the rotating shaft in a rotating working state are realized by the elastic air-inflated sealing ring, the fluid in the cavity is prevented from leaking, the external impurities are prevented from entering the cavity, the sealing of the pressure fluid in the cavity is realized by the mutual cooperation of the fabric sealing ring, the dynamic pressure pumping sealing assembly, the air-inflated sealing ring and the metal sealing ring, and the stability of the ensured sealing performance are utilized, the pressure fluctuation is generated in the cavity, and when the instantaneous pressure is too high, the sealing adaptability is strong, and the service life of the sealing device is long; the metal sealing ring (13) is an elastic alloy material which has good wear resistance, small friction coefficient and difficult thermal expansion; the air inlet and outlet control device (10) is connected to a pressure air source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010801483.0A CN111828644B (en) | 2020-08-11 | 2020-08-11 | Combined sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010801483.0A CN111828644B (en) | 2020-08-11 | 2020-08-11 | Combined sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111828644A CN111828644A (en) | 2020-10-27 |
| CN111828644B true CN111828644B (en) | 2024-03-12 |
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ID=72919265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010801483.0A Active CN111828644B (en) | 2020-08-11 | 2020-08-11 | Combined sealing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN111828644B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115217975B (en) * | 2022-07-22 | 2024-05-10 | 西安近代化学研究所 | Sealing device for converting axial force into radial extrusion bonding force |
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|---|---|---|---|---|
| CN1364987A (en) * | 2001-01-18 | 2002-08-21 | 王玉明 | Spiral groove end sealer capable of being rotated in both directions |
| CN105114625A (en) * | 2015-08-28 | 2015-12-02 | 重庆市腾瀚工贸有限公司 | Middle shield and tail shield connecting structure |
| CN205277699U (en) * | 2015-12-31 | 2016-06-01 | 北京金风科创风电设备有限公司 | Wind generating set's bearing seal filtration and aerogenerator |
| CN106763778A (en) * | 2016-12-12 | 2017-05-31 | 昆明理工大学 | A kind of upstream pumping mechanical seal ring with multiple coil groove |
| CN106812947A (en) * | 2017-02-14 | 2017-06-09 | 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 |
| CN107477181A (en) * | 2017-07-31 | 2017-12-15 | 浙江大学 | A kind of underwater sealing structure |
| CN208138488U (en) * | 2018-05-04 | 2018-11-23 | 辽宁工业大学 | A kind of reaction kettle stuffing seal |
| CN208364787U (en) * | 2018-05-30 | 2019-01-11 | 顺气压缩机技术（苏州）有限公司 | A kind of helical-lobe compressor axle sealing structure |
| CN109578590A (en) * | 2018-12-28 | 2019-04-05 | 洛普兰机械设备(宁波)有限公司 | A kind of hydraulic propeller axis mechanical seal |
-
2020
- 2020-08-11 CN CN202010801483.0A patent/CN111828644B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1364987A (en) * | 2001-01-18 | 2002-08-21 | 王玉明 | Spiral groove end sealer capable of being rotated in both directions |
| CN105114625A (en) * | 2015-08-28 | 2015-12-02 | 重庆市腾瀚工贸有限公司 | Middle shield and tail shield connecting structure |
| CN205277699U (en) * | 2015-12-31 | 2016-06-01 | 北京金风科创风电设备有限公司 | Wind generating set's bearing seal filtration and aerogenerator |
| CN106763778A (en) * | 2016-12-12 | 2017-05-31 | 昆明理工大学 | A kind of upstream pumping mechanical seal ring with multiple coil groove |
| CN106812947A (en) * | 2017-02-14 | 2017-06-09 | 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 |
| CN107477181A (en) * | 2017-07-31 | 2017-12-15 | 浙江大学 | A kind of underwater sealing structure |
| CN208138488U (en) * | 2018-05-04 | 2018-11-23 | 辽宁工业大学 | A kind of reaction kettle stuffing seal |
| CN208364787U (en) * | 2018-05-30 | 2019-01-11 | 顺气压缩机技术（苏州）有限公司 | A kind of helical-lobe compressor axle sealing structure |
| CN109578590A (en) * | 2018-12-28 | 2019-04-05 | 洛普兰机械设备(宁波)有限公司 | A kind of hydraulic propeller axis mechanical seal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111828644A (en) | 2020-10-27 |
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