CN106678371A - Dry gas sealing device of long-distance pipeline natural gas compressor - Google Patents
Dry gas sealing device of long-distance pipeline natural gas compressor Download PDFInfo
- Publication number
- CN106678371A CN106678371A CN201710122455.4A CN201710122455A CN106678371A CN 106678371 A CN106678371 A CN 106678371A CN 201710122455 A CN201710122455 A CN 201710122455A CN 106678371 A CN106678371 A CN 106678371A
- Authority
- CN
- China
- Prior art keywords
- comb
- sealing
- ring
- face
- dry gas
- 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.)
- Pending
Links
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
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
-
- 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
- F16J15/4476—Labyrinth packings with radial path
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Compressor (AREA)
Abstract
The invention discloses a dry gas sealing device of a long-distance pipeline natural gas compressor. A first-grade end surface sealing unit, a second-grade end surface sealing unit and an isolation sealing unit are arranged at the outer periphery of a rotating shaft in sequence from a medium side to an atmosphere side; and a labyrinth sealing unit is serially connected between the two stages of sealing units. Dynamic sealing rings and static sealing rings oppositely arranged with the shaft ends are respectively arranged in the two grades of end surface sealing units; end surface sealing parts are between the opposite end surfaces; the labyrinth sealing unit is a comb tooth structural body with a projection top end and a sealing structure layer in small clearance fit with the comb tooth structural body, which are respectively arranged between opposite wall surfaces in a gas channel for communicating end surface sealing parts of the two grades of end surface sealing units; the isolation sealing unit is provided with an axially positioned comb tooth ring base and a comb tooth ring arranged on the radial inner side; and a comb tooth top end on the inner diameter side of the comb tooth ring and a rotating body outer cylinder surface capable of rotating along with the rotating shaft are oppositely arranged in the radial direction by small gap. The dry gas sealing device can adapt to special working conditions and environments of a long-distance pipeline natural gas system, and effectively improves reliable and stable comprehensive performances of dry gas sealing of the compressor.
Description
Technical field
The present invention relates to a kind of mechanically-sealing apparatus, are especially a kind of dry gas for long distance pipeline natural gas compressor
Sealing device.
Background technology
Dry gas seals technology is widely used to answering for numerous rotating machinery axial direction end face seals with its superior performance
With in, compressor, pump, decompressor, seperator, reactor of such as various types etc. rotate the shaft end seal of class machine.In gas
Body long lines course of conveying, compressor bank also serves as the core of whole conveyer device, the long period safety to ensureing gas pipeline
Stable operation is significant, and under normal circumstances the gland seal device of compressor bank is then to determine that can unit safety and stability
The first element of operation.By taking natural gas as an example, the dry gas seals of current long distance pipeline natural gas compressor, mainly by two-stage before and after
The dry gas seals of arrangement and the isolating seal composition of atmospheric side.The first order is sealed into primary seal, whole pressure reduction is born, using pressure
Contracting machine outlet process gas is used as primary seal gas；Second level dry gas seals are security seal, are generally worked under very low pressure reduction,
A large amount of processing mediums are prevented to leak at the scene in the case of first order seal failure；Isolating seal is stop bearing housing lubricating oil
Into dry gas seals, prevent its pollution from damaging dry gas seals, using compressed air as source of the gas.Due to compressor scene it is not low
Pressure nitrogen, secondary seal is only using the natural gas of primary seal face leakage as work source of the gas, and isolation gas is empty using compression
Gas, although this configuration mode can also allow dry gas seals normally to be run, can bring following some hidden danger as source of the gas：Sealing
During normal work, two grades of leakage gas are the gaseous mixture of natural gas and air, that is, have a small amount of natural gas to be directly discharged into air.During design
By the explosion limit for increasing the air inflow of isolation gas to avoid natural gas, but the isolation gas of big flow can not be obtained very well
Isolation mist of oil effect, may lead can cause lubricant mist to enter dry gas seals；In the driving and parking stage, the leakage rate of primary seal is non-
It is often little, secondary seal can be made to set up enough operating pressures, simultaneously because isolation gas increases tolerance, may be at two grades
The higher back pressure that leakage path is formed, if this back pressure is more than secondary seal operating pressure, it may appear that secondary seal is born instead
The situation of pressure, dry gas seals are run under back-pressure and are easily damaged；In start-up, if natural gas carrying liquid or more containing heavy hydrocarbon,
I and II sealing is all it is possible that situation of the end face with liquid, run is likely to out can two-stage sealing in this state
Now damage, secondary seal gas does not have the effect of security seal；Isolation gas is injected using the compressed air of big flow, makes air big
Amount enters bearing housing, makes the problem of the oxidizable short life of lubricating oil long-term existence, and maintenance cost is higher.Due to usual long distance pipeline
Natural gas compressor media operation pressure is high, the diameter of axle is big, start and stop are frequent, work under bad environment, the performance, reliability to dry gas seals
Property, stability etc. it is also proposed very high requirement.
The content of the invention
For above-mentioned situation, the invention provides a kind of dry gas seals suitable for long distance pipeline natural gas compressor are filled
Put, effectively to lift the combination property of the long distance pipeline natural gas compressor dry gas seals.
The dry gas sealing device of long distance pipeline natural gas compressor of the present invention, is characterized in that in the periphery of rotary shaft by medium
Side to atmospheric side is placed with successively vertically one-level end face seal unit, two grades of end face seal units and isolating seal unit, and
Series winding is provided with labyrinth seal unit between I and II sealing unit.In described firsts and seconds end face seal unit, each
The corresponding rotary packing ring and stationary seal ring being oppositely arranged with coaxial line mode shaft end is included respectively, is divided between its relative end face
Wei not its corresponding end face seal position, the wherein corresponding drive mechanisms of rotary packing ring difference Jing of the two and transmission of rotary axis company
Connect；The corresponding springs of stationary seal ring difference Jing of the two and throw-out collar axial direction float support are in a side end position of respective stationary seat
Put；Described labyrinth seal unit, is included in two connected in the one-level end face seal unit and two grades of end face seal units
In the gas passage at end face seal position, tying with the comb for stretching convex top between relative wall is respectively arranged in gas passage
Structure body and can therewith small―gap suture coordinate sealing structure layer；Described isolating seal unit, including the comb ring seat of axially position
And the comb ring of its radially inner side is arranged at, the comb of comb ring internal side diameter stretches convex top with the rotary body that can be rotated with rotary shaft
Between external cylindrical surface between surface, cooperation is diametrically arranged with small―gap suture.Heretofore described small―gap suture coordinates, ordinary circumstance
Under, its gap width for coordinating is advisable with being not more than 0.5 millimeter.
In said structure, with the comb of the comb structure body sealing structure layer that the relative small―gap suture of nose coordinates is stretched, one
As in the case of preferably thickness be 10 ~ 300 microns, and/or roughness is not higher than 12.5 microns of high-abrasive material coating, and such as aluminum is closed
The conventional high-abrasive material coating such as gold or polytetrafluoroethylmaterial material.
In said structure, gas passage in the labyrinth seal unit can directly by described I and II sealing unit
Opposed configuration face between the first stationary seat and the second rotating seat in relative position is constituted.The described comb for cooperating
Structure and sealing structure layer then can be respectively arranged at constitute gas passage wall the first stationary seat and the second rotating seat it is relative
At structural plane.Wherein, the comb structure body for cooperating and sealing structure layer are preferably provided with position, can select respectively
The inner hole structure face of the first stationary seat in the diametrically channel section of conduit wall and the peripheral structure of the second rotating seat
At face.For example, it is generally the case that the comb structure body in the labyrinth seal unit can be adopted as the form of comb ring, and set
It is placed in by the second rotating seat（Rotary side）The road side surface side that the gas that outer peripheral face is constituted leads to, described sealing structure layer then can be located at
The first relative stationary seat（Stationary side）Side surface side.
Described isolating seal unit, preferably using bipartite form.Wherein, comb ring seat may include with
Shaft end contact contact interior comb ring seat and outer comb ring seat, its radially inner side respectively Jing attachment structures be connected with interior comb ring and
Outer comb ring；The located structure of outer comb ring seat realizes axial restraint with fixed structure location fit.It is described with inside and outside comb ring
The comb of radially inner side stretches convex top, be similarly described little between the external cylindrical surface of the rotary body that can be rotated with axle respectively
Gap coordinates.
The dry gas sealing device of the above-mentioned long distance pipeline natural gas compressor of the present invention increases between primary seal and security seal
If one labyrinth seal, a small amount of process gas leaked out by primary seal, by the slightly higher secondary seal gas of labyrinth lateral pressure
Stop, sealing gas carrying liquid of driving can be avoided, while can ensure that two grades of leakage gas do not contain natural gas, it is entirely avoided air and day
So the mixing of gas, thoroughly ensure that the safety of station, improve the safety of dry gas seals operation, extends dry gas seals and uses
Life-span.And secondary seal gas remains injection, secondary seal back pressure can be always ensured that in the driving and parking of compressor.Two
Level sealing back pressure is lifted, and also at utmost reduces the possibility that secondary seal bears back-pressure in shutdown process, improves dry gas
The safety of sealing operation, extends dry gas seals service life.Additionally, former sealing structure isolation gas need to adopt mass flow air
Injection, result in too fast into the flow velocity of comb, easily causes mist of oil and is blown into secondary leakage chamber by high velocity air, make secondary seal
Polluted by bearing oil, increased the probability of its failure.On the basis of said structure sealing device of the present invention, such as further adopt
Isolation gas is done with nitrogen, it is possible to decrease the flow of isolation gas, the hidden danger that on the one hand can be reduced lubricant pollution sealing and fail, separately
On the one hand lubricating oil no longer ingress of air is made, will also significantly improves the life-span of lubricating oil.
Therefore, the dry gas sealing device of the long distance pipeline natural gas compressor of form of the present invention, can be well adapted for
The special operation condition and environment of long distance pipeline natural gas system, effectively lifts reliable and stable comprehensive of its compressor dry gas seals
Energy.
Below in conjunction with the specific embodiment by accompanying drawing illustrated embodiment, the above of the present invention is remake further
Describe in detail.But this scope for being interpreted as above-mentioned theme of the invention should not be only limitted to Examples below.Without departing from the present invention
In the case of above-mentioned technological thought, the various replacements made according to ordinary skill knowledge and customary means or change all should
It is included within the scope of the invention.
Description of the drawings
Fig. 1 is a kind of schematic diagram of structure of the dry gas sealing device of long distance pipeline natural gas compressor of the present invention.
Specific embodiment
The basic structure of the dry gas sealing device of long distance pipeline natural gas compressor of the present invention as depicted, is in rotation
The periphery of axle 28, by side medium to atmospheric side one-level end face seal unit, two grades of end face seal units are placed with successively vertically
With isolating seal unit, and between I and II sealing unit also series winding be provided with labyrinth seal unit.
The first rotary packing ring and the first static seal that coaxial spool end is oppositely arranged are included in one-level end face seal unit
It is first end face sealing position between ring 3, its relative end face.First rotary packing ring 2 by swelling on axle sleeve 1, and Jing trundles
26 is circumferentially fixed with axle sleeve 1, and realization is connected with rotary shaft 28, axially contacts with the step surface of axle sleeve 1 and by the first rotating ring
11 axial compressions of seat；Jing the first springs 6 of first stationary seal ring 3 and the axial float support of the first throw-out collar 5 are in the one of the first stationary seat 8
Side（It is left side in figure）End position；
The second rotary packing ring 12 and second that coaxial spool end is oppositely arranged is included in two grades of described end face seal units quiet
Sealing ring 13, is second end face sealing position between its opposing end surface.Second rotary packing ring 12 is by swelling in the cylindrical of clamping sleeve 29
On cylinder, axially contact with the step surface of rotating seat 11 and 29 axial compressions of compacted set, it is circumferential to be driven with the first rotating seat 11
Connection, realization is connected with rotary shaft 28；The Jing second springs 16 of second stationary seal ring 13 and the second throw-out collar 15 axially float and prop up
Support in the side of the second stationary seat 18（It is right side in figure）End position；
Described labyrinth seal unit be arranged on for connecting the two-stage sealing unit in first end face sealing position and
In gas passage 7 between biend sealing position.The wall of the gas passage 7 is respectively by the first described stationary seat 8 and second
Opposed configuration face between rotating seat 11 is constituted.Have in the channel in the diametrically channel section of conduit wall, using comb annular
The comb structure body 10 of formula is arranged at the peripheral structure face of the second rotating seat 11 of radially inner side position, matched employing
The sealing structure layer 9 of surface spraying is then located at the relative position in the inner hole structure face of the first stationary seat 8 of radial outside.Sealing
The thickness of structure sheaf 9 is 150 microns, and roughness is not higher than the high-abrasive material coating such as 12.5 microns aluminium alloy, its surface and phase
Stretching for comb structure body 10 coordinated with the small―gap suture in radially monolateral 0.1 millimeter of gap between convex top.
Isolating seal unit by axially position comb ring seat and be arranged at the comb ring group of its radially inner side into.Comb ring
Seat is included with the interior comb ring seat 20 and outer comb ring seat 21 of shaft end contact.The radially inner side Jing screws of interior comb ring seat 20
It is connected with interior comb ring 25；The radially inner side Jing mode connects for screw of outer comb ring seat 21 has outer comb ring 23.Its China and foreign countries comb ring seat 21
Its external cylindrical surface of Jing annular recess structure corresponding between cavity fixed structure 27, with clamp location structure 22 isolating seal list is made
Unit's axial restraint on the whole.The comb of the interior radially inner side of comb ring 25 stretches convex top with the comb axle sleeve that can be rotated with axle 28
（Rotary body）30 external cylindrical surface is coordinated with the small―gap suture in radially monolateral 0.1 millimeter of gap；The comb of the outer radially inner side of comb ring 23
Tooth stretches convex top with the locking nut that can be rotated with axle 28（Rotary body）24 external cylindrical surface is with radially monolateral 0.1 millimeter of gap
Small―gap suture coordinates.
Axle sleeve 1 and rotary shaft in above-mentioned one-level end face seal unit, two grades of end face seal units and isolating seal unit
28 step end face contact realized after axially position, Jing clamping sleeves 29, comb axle sleeve successively vertically from side medium to atmospheric side
30 and locking nut 24 with opposing end surface contact, and tightened by locking nut 24, realize the overall fixation on axle of sealing device.
The annular recess structure of outer comb ring seat 21 and cavity fixed structure 27 is respectively embedded into by clamp location structure 22, realizes that sealing is whole
Body axial restraint on cavity.
Claims (10)
1. the dry gas sealing device of long distance pipeline natural gas compressor, is characterized in that in rotary shaft（28）Periphery by side medium to
Atmospheric side is placed with successively vertically one-level end face seal unit, two grades of end face seal units and isolating seal unit, one, two
Also series winding is provided with labyrinth seal unit between level sealing unit, wherein
The first rotary packing ring that coaxial spool end is oppositely arranged is included in described one-level end face seal unit（2）It is quiet with first
Sealing ring（3）, it is first end face sealing position between its relative end face, the first rotary packing ring（3）Warp beam sleeve（1）With rotary shaft
（28）It is connected, the first stationary seal ring（3）The springs of Jing first（6）With the first throw-out collar（5）Axial float support is in the first stationary ring
Seat（8）Side end position；
The second rotary packing ring that coaxial spool end is oppositely arranged is included in two grades of described end face seal units（12）With second
Stationary seal ring（13）, it is second end face sealing position between its opposing end surface, the second rotary packing ring（12）With can be with rotary shaft（28）
The second rotating seat for rotating（11）It is connected, the second stationary seal ring（13）Jing second springs（16）With the second throw-out collar（15）Axially
Float support is in the second stationary seat（18）Side end position；
Described labyrinth seal unit is included in the two ends for connecting the one-level end face seal unit and two grades of end face seal units
The gas passage at face seal position（7）In, it is respectively arranged at gas passage（7）Between middle relative wall with the comb for stretching convex top
Teeth formations（10）With can therewith small―gap suture coordinate sealing structure layer（9）；
Described isolating seal unit includes the comb ring seat of axially position and is arranged at the comb ring of its radially inner side, comb
The comb of ring internal side diameter stretch convex top with can be with rotary shaft（28）The rotary body external cylindrical surface of rotation is with small―gap suture cooperation.
2. dry gas sealing device as claimed in claim 1, is characterized in that gas passage in the labyrinth seal unit（7）By institute
In the first stationary seat of relative position in the I and II sealing unit stated（8）With the second rotating seat（11）Between opposed configuration
Face is constituted, the comb structure body for cooperating（10）With sealing structure layer（9）The first stationary seat is located at respectively（8）With
Two rotating seats（11）Opposed configuration face on.
3. dry gas sealing device as claimed in claim 2, is characterized in that the described comb structure body for cooperating（10）
With sealing structure layer（9）The first stationary seat having in the diametrically channel section of conduit wall is located at respectively（8）Inner hole structure
Face and the second rotating seat（11）Peripheral structure face at.
4. dry gas sealing device as claimed in claim 3, is characterized in that the comb structure body in described labyrinth seal unit
（10）Positioned at the second rotating seat（11）Side surface side, sealing structure layer（9）Positioned at the first relative stationary seat（8）Side surface side.
5. dry gas sealing device as claimed in claim 4, is characterized in that the comb structure body in described labyrinth seal unit
（10）To be arranged at the second rotating seat（11）Outer peripheral face comb ring.
6. dry gas sealing device as claimed in claim 1, is characterized in that the comb ring seat in the isolating seal unit includes
With the interior comb ring seat of shaft end contact（20）With outer comb ring seat（21）, respectively Jing attachment structures are connected with its radially inner side
Interior comb ring（25）With outer comb ring（23）, outer comb ring seat（21）Located structure（22）Realize with fixed structure location fit
Axial restraint, it is described with inside and outside comb ring（25,23）The comb of radially inner side stretch convex top respectively with can be with axle（28）Rotate
Rotary body（30,24）External cylindrical surface small―gap suture coordinate.
7. the dry gas sealing device as described in one of claim 1 to 6, the comb that it is characterized in that the comb structure body stretches nose
It is not more than 0.5 millimeter with the fit clearance value being combined into the small―gap suture between relative structure layer surface.
8. the dry gas sealing device as described in one of claim 1 to 6, is characterized in that the sealing knot in the labyrinth seal unit
Structure layer（9）For 10 ~ 300 microns of thickness, roughness is not higher than 12.5 microns of high-abrasive material coating.
9. dry gas sealing device as claimed in claim 7, is characterized in that the sealing structure layer in the labyrinth seal structure（9）
For 10 ~ 300 microns of thickness, roughness is not higher than 12.5 microns of high-abrasive material coating.
10. dry gas sealing device as claimed in claim 8, is characterized in that the sealing structure layer in the labyrinth seal structure
（9）For aluminum alloy materials coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710122455.4A CN106678371A (en) | 2017-03-03 | 2017-03-03 | Dry gas sealing device of long-distance pipeline natural gas compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710122455.4A CN106678371A (en) | 2017-03-03 | 2017-03-03 | Dry gas sealing device of long-distance pipeline natural gas compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106678371A true CN106678371A (en) | 2017-05-17 |
Family
ID=58862784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710122455.4A Pending CN106678371A (en) | 2017-03-03 | 2017-03-03 | Dry gas sealing device of long-distance pipeline natural gas compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106678371A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681637A (en) * | 2019-02-18 | 2019-04-26 | 东北大学 | A kind of daul-side dry round gas seal for screw vacuum dry pump |
| CN109723825A (en) * | 2017-10-27 | 2019-05-07 | 北京精密机电控制设备研究所 | A kind of dry gas sealing device of combining form |
| CN112145694A (en) * | 2020-10-20 | 2020-12-29 | 马鞍山齐力机电设备有限公司 | Multistage rotary seal for granular water-containing raw materials |
| CN114183394A (en) * | 2021-11-25 | 2022-03-15 | 沈阳鼓风机集团安装检修配件有限公司 | Centrifugal compressor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020197154A1 (en) * | 2000-03-09 | 2002-12-26 | Hideto Nogiwa | Turbo type fluid machine and dry gas seal for use therefor |
| CN102348915A (en) * | 2009-03-10 | 2012-02-08 | 西门子公司 | Shaft seal for a turbomachine |
| CN203702642U (en) * | 2013-10-16 | 2014-07-09 | 中国石油集团工程设计有限责任公司 | Low-temperature large-shaft-diameter dry gas sealing device for centrifugal compressor |
| CN203939999U (en) * | 2014-07-10 | 2014-11-12 | 杨广华 | The multistage dry gas sealing device of charge gas compressor |
| CN203948637U (en) * | 2014-07-15 | 2014-11-19 | 沈阳北碳密封有限公司 | Band honeycomb series connection dry gas seals |
| CN205841769U (en) * | 2016-07-19 | 2016-12-28 | 福建雪人股份有限公司 | A kind of dry gas sealing device |
| CN206600472U (en) * | 2017-03-03 | 2017-10-31 | 四川日机密封件股份有限公司 | The dry gas sealing device of long distance pipeline natural gas compressor |
-
2017
- 2017-03-03 CN CN201710122455.4A patent/CN106678371A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020197154A1 (en) * | 2000-03-09 | 2002-12-26 | Hideto Nogiwa | Turbo type fluid machine and dry gas seal for use therefor |
| CN102348915A (en) * | 2009-03-10 | 2012-02-08 | 西门子公司 | Shaft seal for a turbomachine |
| CN203702642U (en) * | 2013-10-16 | 2014-07-09 | 中国石油集团工程设计有限责任公司 | Low-temperature large-shaft-diameter dry gas sealing device for centrifugal compressor |
| CN203939999U (en) * | 2014-07-10 | 2014-11-12 | 杨广华 | The multistage dry gas sealing device of charge gas compressor |
| CN203948637U (en) * | 2014-07-15 | 2014-11-19 | 沈阳北碳密封有限公司 | Band honeycomb series connection dry gas seals |
| CN205841769U (en) * | 2016-07-19 | 2016-12-28 | 福建雪人股份有限公司 | A kind of dry gas sealing device |
| CN206600472U (en) * | 2017-03-03 | 2017-10-31 | 四川日机密封件股份有限公司 | The dry gas sealing device of long distance pipeline natural gas compressor |
Non-Patent Citations (2)
| Title |
|---|
| 张锡德等: "串联式干气密封在合成气压缩机上的运用", 《石油化工设备技术》 * |
| 李毅等: "干气密封气源预处理系统在天然气管道压缩机上的应用", 《化工设备与管道》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109723825A (en) * | 2017-10-27 | 2019-05-07 | 北京精密机电控制设备研究所 | A kind of dry gas sealing device of combining form |
| CN109681637A (en) * | 2019-02-18 | 2019-04-26 | 东北大学 | A kind of daul-side dry round gas seal for screw vacuum dry pump |
| CN112145694A (en) * | 2020-10-20 | 2020-12-29 | 马鞍山齐力机电设备有限公司 | Multistage rotary seal for granular water-containing raw materials |
| CN112145694B (en) * | 2020-10-20 | 2024-05-14 | 马鞍山齐力机电设备有限公司 | Multistage rotary seal for granular water-containing raw materials |
| CN114183394A (en) * | 2021-11-25 | 2022-03-15 | 沈阳鼓风机集团安装检修配件有限公司 | Centrifugal compressor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106678371A (en) | Dry gas sealing device of long-distance pipeline natural gas compressor | |
| CN105422863B (en) | A kind of liquid oxygen pump sealer with assembled | |
| CN209041569U (en) | A kind of cryogenic pump combination sealing arrangement | |
| CN103459903B (en) | shaft seal insert | |
| CN103459904B (en) | Shaft sealer | |
| CN104989830B (en) | Multistage magnetic liquid sealing device for sealing liquid | |
| CN101713461A (en) | Dry gas sealing device for technical screw compressor and application system thereof | |
| CA2335691C (en) | Pressurized chamber seal cartridge | |
| GB2420602A (en) | A non-contacting sealing device for a rotor shaft bearing | |
| JP2010522857A (en) | Double seal with pressure lip | |
| EP0819873A1 (en) | Bellows seal with reverse pressure capability | |
| CN102459820B (en) | Turbomachine | |
| CN104482215A (en) | Shaft-end multiple seal of centrifugal compressor | |
| CN206600472U (en) | The dry gas sealing device of long distance pipeline natural gas compressor | |
| CN219432054U (en) | Oil seal and air seal device for dry vacuum pump and rotary machine | |
| CN102889387A (en) | Graphite oil seal device | |
| CN205639619U (en) | Combined sealing device for liquid oxygen pump | |
| CN202851963U (en) | Graphite oil sealing device | |
| CN201288819Y (en) | Bidirectional balance mechanical seal device | |
| CN106285785A (en) | The single machine two-stage dilating screw machine that pressure energy of natural gas recycles | |
| CN206972918U (en) | A kind of rotating ring common type mechanically-sealing apparatus | |
| CN110681498A (en) | Explosion-proof type decanter centrifuge based on carbocycle is sealed | |
| CN116480584B (en) | Oil seal and air seal device for dry vacuum pump and rotary machine | |
| CN208487211U (en) | A kind of band plain type labyrinth mechanically-sealing apparatus | |
| CN214998063U (en) | Oil transfer pump isolation device for preventing oil leakage in oil transfer pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Zeping Inventor after: Liu Xiaoming Inventor after: Wang Lei Inventor after: Shen Denghai Inventor after: Wang Qingliang Inventor after: Liu Ting Inventor after: Liu Jianrong Inventor after: Wang Heshun Inventor after: Deng Wencai Inventor before: Wang Zeping Inventor before: Liu Xiaoming Inventor before: Liu Ting Inventor before: Liu Jianrong Inventor before: Wang Heshun |
|
| CB03 | Change of inventor or designer information | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170517 |
|
| WD01 | Invention patent application deemed withdrawn after publication |