CN108506496B - Isolation type dynamic pressure sealing device and mechanical equipment - Google Patents
Isolation type dynamic pressure sealing device and mechanical equipment Download PDFInfo
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- CN108506496B CN108506496B CN201810287713.9A CN201810287713A CN108506496B CN 108506496 B CN108506496 B CN 108506496B CN 201810287713 A CN201810287713 A CN 201810287713A CN 108506496 B CN108506496 B CN 108506496B
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- 238000007789 sealing Methods 0.000 title claims abstract description 99
- 238000002955 isolation Methods 0.000 title abstract description 7
- 239000011261 inert gas Substances 0.000 claims abstract description 28
- 230000003068 static effect Effects 0.000 claims description 10
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 5
- 230000004308 accommodation Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/36—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member connected by a diaphragm or bellow to the other member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/44—Free-space packings
- F16J15/447—Labyrinth packings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Sealing (AREA)
- Sealing Devices (AREA)
Abstract
The invention provides an isolated dynamic pressure sealing device and mechanical equipment. The device comprises: the device comprises a first mounting seat, a second mounting seat, a first corrugated pipe dynamic pressure sealing assembly, a first pressure relief sealing assembly, a second corrugated pipe dynamic pressure sealing assembly and a second pressure relief sealing assembly; the first mounting seat is provided with a mounting hole, a first outflow channel is formed between one end of the second mounting seat and the wall of the mounting hole, a second outflow channel is formed between the other end of the second mounting seat and the wall of the mounting hole, and the second mounting seat is provided with an inflow channel; the inflow channel is communicated with inert gas, and the first outflow channel and the second outflow channel are communicated with air medium; the inert gas flowing in from the inflow channel merges with the first medium leaking from the first bellows dynamic pressure sealing assembly and then flows out from the first outflow channel, and the inert gas flowing in from the inflow channel merges with the second medium leaking from the second bellows dynamic pressure sealing assembly and then flows out from the second outflow channel. The invention can realize the sealing and isolation of two media which cannot be contacted.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to an isolated dynamic pressure sealing device and mechanical equipment.
Background
In the technical field of engineering machinery, there is often a working condition that two non-contact media need to be isolated, but no effective method is available to achieve the object, so how to seal and isolate two non-contact media is a problem to be solved by those skilled in the art.
Disclosure of Invention
The invention provides an isolated dynamic pressure sealing device and mechanical equipment, which are used for sealing and isolating two media which cannot be contacted.
In one aspect, an embodiment of the present invention provides an isolated dynamic pressure sealing device applied to a mechanical apparatus, where the mechanical apparatus includes a transmission shaft and a shaft sleeve, the device includes: the first mounting seat, the second mounting seat, the first corrugated pipe dynamic pressure sealing assembly, the first pressure relief sealing assembly, the second corrugated pipe dynamic pressure sealing assembly and the second pressure relief sealing assembly are respectively sleeved outside the shaft sleeve; wherein,,
the first mounting seat is provided with an annular mounting hole which penetrates through the outer wall to the shaft sleeve, an annular first outflow channel is formed between one end of the second mounting seat and the wall of the mounting hole, an annular second outflow channel is formed between the other end of the second mounting seat and the wall of the mounting hole, and the second mounting seat is provided with an annular inflow channel which penetrates through the outer wall to the shaft sleeve; the inflow channel is communicated with inert gas with the pressure of 0.3-0.5 megapascal, and the first outflow channel and the second outflow channel are communicated with an air medium;
an annular first accommodating cavity is arranged between one end, close to the first outflow channel, of the first mounting seat and the first outflow channel, and a part of the first bellows dynamic pressure sealing assembly is arranged in the first accommodating cavity so as to seal a first medium with the external pressure of 0.5-1.0 megapascal; an annular second accommodating cavity is arranged between one end, close to the second outflow channel, of the first mounting seat and the second outflow channel, a part of the second bellows dynamic pressure sealing assembly is arranged in the second accommodating cavity to seal a second medium with the external pressure of 0.5-1.0 megapascal, and the second medium and the first medium are two mediums to be isolated and the temperature is lower than minus 100 ℃;
an annular third accommodating cavity is formed between the first outflow channel and the inflow channel in the second mounting seat, and the first pressure relief sealing assembly is mounted in the third accommodating cavity; an annular fourth accommodating cavity is formed between the inflow channel and the second outflow channel in the second mounting seat, and the second pressure relief sealing assembly is mounted in the fourth accommodating cavity;
the inert gas flowing in from the inflow channel is converged with the first medium leaked from the first corrugated pipe dynamic pressure sealing assembly and then flows out from the first outflow channel, and the inert gas flowing in from the inflow channel is converged with the second medium leaked from the second corrugated pipe dynamic pressure sealing assembly and then flows out from the second outflow channel.
Optionally, the first bellows dynamic pressure seal assembly includes a moving ring and a stationary ring; wherein,,
the movable ring is fixedly sleeved outside the transmission shaft and is attached to one end of the shaft sleeve, the movable ring is provided with a movable ring sealing end face, and a dynamic pressure groove is formed in the movable ring sealing end face;
one end of the stationary ring is arranged in the first accommodating cavity, the other end of the stationary ring is provided with a stationary ring sealing end face, and the stationary ring sealing end face is opposite to the movable ring sealing end face;
the movable ring is in a static state, and the sealing end face of the movable ring is tightly attached to the sealing end face of the static ring;
and the movable ring runs at a preset rotating speed, and then the sealing end face of the movable ring and the sealing end face of the static ring are opened.
Optionally, the preset rotation speed is greater than or equal to 20000 rotations per minute.
Optionally, the first pressure relief seal assembly and the second pressure relief seal assembly are floating ring seal assemblies.
Optionally, the first pressure relief seal assembly and the second pressure relief seal assembly are both labyrinth seal assemblies.
On the other hand, the embodiment of the invention provides mechanical equipment, which comprises the isolation type dynamic pressure sealing device.
In the isolated dynamic pressure sealing device provided by the embodiment of the invention, through integrating the two groups of bellows dynamic pressure sealing components and the two groups of pressure relief sealing components, two media which cannot be contacted can flow out from different outflow channels along with one path of inert gas respectively, so that the sealing and leakage of the two media which cannot be contacted can be better realized by the embodiment of the invention.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 is a schematic structural diagram of an isolated dynamic pressure sealing device according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The isolation type dynamic pressure sealing device provided by the embodiment of the invention is first described below.
Referring to fig. 1, a schematic structural diagram of an isolated dynamic pressure sealing device according to an embodiment of the present invention is shown. As shown in fig. 1, the device is applied to a mechanical apparatus including a transmission shaft 1 and a sleeve 2, and the device includes: the first mounting seat 3, the second mounting seat 4, the first corrugated pipe dynamic pressure sealing assembly 5, the first pressure relief sealing assembly 6, the second corrugated pipe dynamic pressure sealing assembly 7 and the second pressure relief sealing assembly 8 are respectively sleeved outside the shaft sleeve 2.
The first pressure relief sealing assembly 6 and the second pressure relief sealing assembly 8 have two functions of pressure relief and sealing. Specifically, the first pressure relief sealing assembly 6 and the second pressure relief sealing assembly 8 may be floating ring sealing assemblies; alternatively, the first pressure relief seal assembly 6 and the second pressure relief seal assembly 8 may each be a labyrinth seal assembly. In the case where the first pressure relief seal assembly 6 and the second pressure relief seal assembly 8 are floating ring seal assemblies, a floating ring may be included in the first pressure relief seal assembly 6 and the second pressure relief seal assembly 8.
The first mount 3 is provided with an annular mounting hole penetrating from an outer wall (here, the outer wall of the first mount 3) to the shaft sleeve 2, a first annular outflow channel 9 is formed between one end (the left end shown in fig. 1) of the second mount 4 and the wall of the mounting hole, a second annular outflow channel 10 is formed between the other end (the right end shown in fig. 1) of the second mount 4 and the wall of the mounting hole, and the second mount 4 is provided with an annular inflow channel 11 penetrating from the outer wall (here, the outer wall of the second mount 4) to the shaft sleeve 2; the inflow channel 11 communicates with an inert gas at a pressure of 0.3-0.5 mpa, and the first outflow channel 9 and the second outflow channel 10 communicate with an air medium.
It should be noted that, the type of the inert gas communicated with the inflow channel 11 may be determined according to practical situations, and only the inert gas is required to be ensured not to react with the first medium and the second medium mentioned later, and the embodiment of the present invention does not limit the specific type of the inert gas.
An annular first accommodating cavity 12 is arranged between one end (the left end shown in fig. 1) of the first mounting seat 3, which is close to the first outflow channel 9, and a part of the first bellows dynamic pressure sealing assembly 5 is mounted in the first accommodating cavity 12 so as to seal a first medium with a pressure of 0.5-1.0 mpa outside the first mounting seat 3 (specifically, outside the left end face of the first mounting seat 3).
Since the first bellows dynamic pressure seal assembly 5 can seal the first medium outside the left end face of the first mount 3, the first medium is difficult to enter into the first accommodating chamber 12.
An annular second accommodating cavity 13 is arranged between one end (right end shown in fig. 1) of the first mounting seat 3, which is close to the second outflow channel 10, and a part of the second bellows dynamic pressure sealing assembly 7 is arranged in the second accommodating cavity 13 to seal a second medium with the external pressure of 0.5-1.0 megapascal of the first mounting seat 3, wherein the second medium and the first medium are two mediums to be isolated and the temperature is lower than minus 100 ℃.
The temperatures of the first medium and the second medium may be the same or different. It should be noted that in the embodiment of the present invention, the first medium and the second medium are specifically two media that are not allowed to be contacted, for example, two media that are contacted to cause dangerous accidents such as explosion.
An annular third accommodating cavity 14 is formed between the first outflow channel 9 and the inflow channel 11 in the second mounting seat 4, and the first pressure relief sealing assembly 6 is mounted in the third accommodating cavity 14; an annular fourth accommodating cavity 15 is arranged between the inflow channel 11 and the second outflow channel 10 in the second mounting seat 4, and the second pressure relief sealing assembly 8 is mounted in the fourth accommodating cavity 15.
Specifically, to achieve reliable installation of the first pressure relief seal assembly 6 and the second pressure relief seal assembly 8, the shape of the first pressure relief seal assembly 6 may be adapted to the shape of the third receiving cavity 14, and the shape of the second pressure relief seal assembly 8 may be adapted to the shape of the fourth receiving cavity 15.
It should be noted that in the case where the first pressure relief seal assembly 6 and the second pressure relief seal assembly 8 are both floating ring seal assemblies, the second mount 4 may be considered a floating ring mount.
The inert gas flowing in from the inflow channel 11 merges with the first medium leaking from the first bellows dynamic pressure seal assembly 5 and then flows out from the first outflow channel 9, and the inert gas flowing in from the inflow channel 11 merges with the second medium leaking from the second bellows dynamic pressure seal assembly 7 and then flows out from the second outflow channel 10.
The working principle of the isolation type dynamic pressure sealing device provided by the embodiment of the invention is explained below.
In the embodiment of the invention, the first medium outside the left end surface of the first mounting seat 3 is assumed to be medium A, the second medium outside the right end surface of the first mounting seat 3 is assumed to be medium B, and two kinds of media which can cause dangerous accidents when the medium A and the medium B are contacted.
In practice, an operator may introduce an inert gas at a pressure of 0.4 mpa at the inlet of the inflow channel 11, so that the inert gas flows in the direction indicated by the arrow J1 in fig. 1. Thereafter, when the inert gas flows to a position near the sleeve 2, the inert gas leaks to the left and right, that is, flows toward the first pressure relief seal assembly 6 in a direction indicated by an arrow J2 and flows toward the second pressure relief seal assembly 8 in a direction indicated by an arrow J3.
After the inert gas leaking towards the first pressure relief seal assembly 6 passes the first pressure relief seal assembly 6, the pressure of the inert gas will be substantially reduced, which is only slightly greater than the pressure of the air medium. Similarly, after the inert gas leaking to the second pressure relief seal assembly 8 passes through the second pressure relief seal assembly 8, the pressure of the inert gas will also be substantially reduced, which is only slightly greater than the pressure of the air medium.
In addition, although the first bellows dynamic seal assembly 5 can have a better sealing effect on the medium a, a part of the medium a leaks into the first accommodating cavity 12 through the first bellows dynamic seal assembly 5, and the pressure of the medium a leaking into the first accommodating cavity 12 is reduced from 0.5 to 1.0 mpa to be slightly greater than the pressure of the air medium.
Similarly, although the second bellows dynamic seal assembly 7 can perform a better sealing effect on the medium B, a part of the medium B leaks into the second accommodating chamber 13 through the second bellows dynamic seal assembly 7, and the pressure of the medium B leaking into the second accommodating chamber 13 is reduced from 0.5 to 1.0 mpa to slightly greater than the pressure of the air medium.
Thereafter, the inert gas leaking through the first pressure release seal assembly 6 and the medium a leaking into the first accommodation chamber 12 move toward each other to a position W1 in fig. 1, and flow out together from the first outflow passage 9 in the direction indicated by the arrow J4. Similarly, the inert gas leaking through the second pressure release seal assembly 8 and the medium B leaking into the second accommodation chamber 13 move toward each other to the position W2 in fig. 1, and flow out together from the first outflow passage 9 in the direction indicated by the arrow J5. Since the leaked medium a and medium B flow out from different outflow channels along with one path of inert gas respectively, the leaked medium a and medium B do not meet.
In the isolated dynamic pressure sealing device provided by the embodiment of the invention, through integrating the two groups of bellows dynamic pressure sealing components and the two groups of pressure relief sealing components, two media which cannot be contacted can flow out from different outflow channels along with one path of inert gas respectively, so that the sealing and leakage of the two media which cannot be contacted can be better realized by the embodiment of the invention.
Alternatively, as shown in fig. 1, the first bellows dynamic seal assembly 5 includes a moving ring 51 (may also be referred to as a bellows moving ring) and a stationary ring 52 (may also be referred to as a bellows stationary ring); wherein,,
the movable ring 51 is fixedly sleeved outside the transmission shaft 1 and is attached to one end (the left end shown in fig. 1) of the shaft sleeve 2, the movable ring 51 is provided with a movable ring sealing end surface 510, and a dynamic pressure groove is formed in the movable ring sealing end surface 510.
Wherein the dynamic pressure groove can be a spiral dynamic pressure groove. It is easy to see that the sleeve 2 can perform a better limiting function on the ring 51.
One end (right end as viewed in fig. 1) of the stationary ring 52 is mounted in the first accommodation chamber 12, and the other end (left end as viewed in fig. 1) of the stationary ring 52 has a stationary ring seal end surface 520, the stationary ring seal end surface 520 being opposite 510 to the movable ring seal end surface.
When the movable ring 51 is in a static state, the movable ring sealing end surface 510 and the static ring sealing end surface 520 are tightly attached;
the moving ring 51 is operated at a preset rotational speed, and the moving ring seal end surface 510 and the stationary ring seal end surface 520 are opened.
Wherein the preset rotating speed is more than or equal to 20000 revolutions per minute. Specifically, the preset rotation speed may be 20000 rotations per minute, 24000 rotations per minute or 28000 rotations per minute, and of course, the value of the preset rotation speed is not limited to this, and may be specifically determined according to the actual situation, which is not limited in the embodiment of the present invention. At the preset rotation speed, the moving ring 51 can be regarded as a high-speed rotation state.
In this embodiment, when the moving ring 51 is in a static state, the moving ring sealing end surface 510 and the static ring sealing end surface 520 are tightly attached, so that a better sealing effect can be achieved on the first medium, so as to prevent the medium a from entering the first accommodating cavity 12. When the moving ring 51 is in a high-speed rotation state, the moving ring seal end surface 510 and the stationary ring seal end surface 520 are opened due to the action of the dynamic pressure grooves, and at this time, although a small amount of the first medium enters the first accommodating chamber 12 through the opened moving ring seal end surface 510 and stationary ring seal end surface 520, this does not cause the meeting of the first medium and the second medium, and in this way, the frictional wear of the moving ring seal end surface 510 and the stationary ring seal end surface 520 can be effectively reduced to prolong the service lives of the moving ring 51 and the stationary ring 52.
It should be noted that the structures of the first bellows dynamic pressure sealing assembly 5 and the second bellows dynamic pressure sealing assembly 7 are similar, and the specific structure of the second bellows dynamic pressure sealing assembly 7 is only required to refer to the description of the specific structure of the first bellows dynamic pressure sealing assembly 5, and will not be described herein.
In summary, the present embodiment can better achieve sealing and leakage of two media that cannot be contacted.
The following describes a mechanical device provided in an embodiment of the present invention.
The embodiment of the invention also provides mechanical equipment comprising the isolated dynamic pressure sealing device. The specific implementation process of the isolation type dynamic pressure sealing device is just described with reference to the above, and the embodiment of the present invention is not limited in any way.
Because the isolated dynamic pressure sealing device has the technical effects, the mechanical equipment with the isolated dynamic pressure sealing device also has corresponding technical effects, and the details are not repeated here.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (6)
1. An isolated dynamic pressure sealing device for use in a machine, the machine comprising a drive shaft and a sleeve, the device comprising: the first mounting seat, the second mounting seat, the first corrugated pipe dynamic pressure sealing assembly, the first pressure relief sealing assembly, the second corrugated pipe dynamic pressure sealing assembly and the second pressure relief sealing assembly are respectively sleeved outside the shaft sleeve; wherein,,
the first mounting seat is provided with an annular mounting hole which penetrates through the outer wall to the shaft sleeve, an annular first outflow channel is formed between one end of the second mounting seat and the wall of the mounting hole, an annular second outflow channel is formed between the other end of the second mounting seat and the wall of the mounting hole, and the second mounting seat is provided with an annular inflow channel which penetrates through the outer wall to the shaft sleeve; the inflow channel is communicated with inert gas with the pressure of 0.3-0.5 megapascal, and the first outflow channel and the second outflow channel are communicated with an air medium;
an annular first accommodating cavity is arranged between one end, close to the first outflow channel, of the first mounting seat and the first outflow channel, and a part of the first bellows dynamic pressure sealing assembly is arranged in the first accommodating cavity so as to seal a first medium with the external pressure of 0.5-1.0 megapascal; an annular second accommodating cavity is arranged between one end, close to the second outflow channel, of the first mounting seat and the second outflow channel, a part of the second bellows dynamic pressure sealing assembly is arranged in the second accommodating cavity to seal a second medium with the external pressure of 0.5-1.0 megapascal, and the second medium and the first medium are two mediums to be isolated and the temperature is lower than minus 100 ℃;
an annular third accommodating cavity is formed between the first outflow channel and the inflow channel in the second mounting seat, and the first pressure relief sealing assembly is mounted in the third accommodating cavity; an annular fourth accommodating cavity is formed between the inflow channel and the second outflow channel in the second mounting seat, and the second pressure relief sealing assembly is mounted in the fourth accommodating cavity;
the inert gas flowing in from the inflow channel is converged with the first medium leaked from the first corrugated pipe dynamic pressure sealing assembly and then flows out from the first outflow channel, and the inert gas flowing in from the inflow channel is converged with the second medium leaked from the second corrugated pipe dynamic pressure sealing assembly and then flows out from the second outflow channel.
2. The apparatus of claim 1, wherein the first bellows dynamic seal assembly comprises a moving ring and a stationary ring; wherein,,
the movable ring is fixedly sleeved outside the transmission shaft and is attached to one end of the shaft sleeve, the movable ring is provided with a movable ring sealing end face, and a dynamic pressure groove is formed in the movable ring sealing end face;
one end of the stationary ring is arranged in the first accommodating cavity, the other end of the stationary ring is provided with a stationary ring sealing end face, and the stationary ring sealing end face is opposite to the movable ring sealing end face;
the movable ring is in a static state, and the sealing end face of the movable ring is tightly attached to the sealing end face of the static ring;
and the movable ring runs at a preset rotating speed, and then the sealing end face of the movable ring and the sealing end face of the static ring are opened.
3. The device of claim 2, wherein the preset rotational speed is greater than or equal to 20000 revolutions per minute.
4. The device of any one of claims 1-3, wherein the first pressure relief seal assembly and the second pressure relief seal assembly are both floating ring seal assemblies.
5. The device of any one of claims 1-3, wherein the first pressure relief seal assembly and the second pressure relief seal assembly are both labyrinth seal assemblies.
6. A mechanical device comprising an isolated dynamic pressure sealing apparatus as claimed in any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810287713.9A CN108506496B (en) | 2018-04-03 | 2018-04-03 | Isolation type dynamic pressure sealing device and mechanical equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810287713.9A CN108506496B (en) | 2018-04-03 | 2018-04-03 | Isolation type dynamic pressure sealing device and mechanical equipment |
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| CN108506496A CN108506496A (en) | 2018-09-07 |
| CN108506496B true CN108506496B (en) | 2023-06-13 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6311983B1 (en) * | 1989-09-26 | 2001-11-06 | The Boeing Company | Combination static lift-off face contact seal and floating ring shaft seal |
| JP2011007239A (en) * | 2009-06-24 | 2011-01-13 | Nippon Pillar Packing Co Ltd | Double mechanical seal |
| CN201943995U (en) * | 2010-07-08 | 2011-08-24 | 中国航天科技集团公司第六研究院第十一研究所 | Dynamic sealing device suitable for a hydrogen peroxide medium |
| WO2014061543A1 (en) * | 2012-10-19 | 2014-04-24 | イーグルブルグマンジャパン株式会社 | Bellows seal |
| CN105090518A (en) * | 2015-09-14 | 2015-11-25 | 成都赛乐化新机电有限公司 | Corrugated pipe type dry gas seal device and seal method |
-
2018
- 2018-04-03 CN CN201810287713.9A patent/CN108506496B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6311983B1 (en) * | 1989-09-26 | 2001-11-06 | The Boeing Company | Combination static lift-off face contact seal and floating ring shaft seal |
| JP2011007239A (en) * | 2009-06-24 | 2011-01-13 | Nippon Pillar Packing Co Ltd | Double mechanical seal |
| CN201943995U (en) * | 2010-07-08 | 2011-08-24 | 中国航天科技集团公司第六研究院第十一研究所 | Dynamic sealing device suitable for a hydrogen peroxide medium |
| WO2014061543A1 (en) * | 2012-10-19 | 2014-04-24 | イーグルブルグマンジャパン株式会社 | Bellows seal |
| CN105090518A (en) * | 2015-09-14 | 2015-11-25 | 成都赛乐化新机电有限公司 | Corrugated pipe type dry gas seal device and seal method |
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