CN206600472U - The dry gas sealing device of long distance pipeline natural gas compressor - Google Patents
The dry gas sealing device of long distance pipeline natural gas compressor Download PDFInfo
- Publication number
- CN206600472U CN206600472U CN201720200375.1U CN201720200375U CN206600472U CN 206600472 U CN206600472 U CN 206600472U CN 201720200375 U CN201720200375 U CN 201720200375U CN 206600472 U CN206600472 U CN 206600472U
- Authority
- CN
- China
- Prior art keywords
- ring
- face
- broach
- seal unit
- 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.)
- Active
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The dry gas sealing device of long distance pipeline natural gas compressor.I and II end face seal unit and isolating seal unit are placed with by side medium to atmospheric side successively in the periphery of rotary shaft, labyrinth seal unit is also connected between two-stage sealing unit.Have respectively in two-stage end face seal unit between the rotary packing ring and stationary seal ring being oppositely arranged with shaft end, its relative end face is end face seal position；Labyrinth seal unit be connection two-stage end face seal unit end face seal position gas passage in, be respectively arranged in gas passage between relative wall have stretch convex top comb structure body and can therewith small―gap suture coordinate sealing structure layer；There are the broach ring seat and the broach ring located at its radially inner side of axially position in isolating seal unit, the broach top of broach ring internal side diameter is diametrically set with the rotary body external cylindrical surface that can be rotated with rotary shaft with small―gap suture.The dry gas sealing device adapts to the special operation condition and environment of long distance pipeline natural gas system, effectively lifts the reliable and stable combination property of its compressor dry gas seals.
Description
Technical field
The utility model is related to a kind of mechanically-sealing apparatus, be especially it is a kind of be used for long distance pipeline natural gas compressor
Dry gas sealing device.
Background technology
Dry gas seals technology is widely used to answering for the axial end face seal of numerous rotating machineries with its superior performance
In, the shaft end seal of class machine is rotated such as the compressor of various types, pump, expanding machine, seperator, reactor.In gas
Body long lines course of conveying, compressor set also serves as the core of whole conveying device, the long period safety to ensureing gas pipeline
Stable operation is significant, and the gland seal device of compressor set is then to determine that can unit safety and stability under normal circumstances
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 before and after two-stage
The dry gas seals of arrangement and the isolating seal composition of atmospheric side.The first order is sealed into primary seal, whole pressure differences 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 difference,
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, source of the gas is used as using compressed air.Because compressor scene is not low
Nitrogen is pressed, secondary seal only has the natural gas using primary seal face leakage as work source of the gas, and isolation gas is empty using compression
Gas is as source of the gas, although this configuration mode can also allow dry gas seals normally to run, can bring following some hidden danger：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
The explosion limit of natural gas is avoided by increasing the air inflow of isolation 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 small, secondary seal can be made can not to set up enough operating pressures, simultaneously because isolation gas increases tolerance, may be at two grades
The higher back pressure of leakage path formation, 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 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, in this state operation can be likely to out two-stage sealing
Now damage, secondary seal gas does not have the effect of security seal；Isolate gas to inject using the compressed air of big flow, make air big
Amount enters bearing housing, and the problem of making lubricating oil long-term existence oxidizable short life, 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, and working environment is severe, performance to dry gas seals, reliably
Property, stability etc. it is also proposed very high requirement.
Utility model content
For above-mentioned situation, the utility model provides a kind of dry gas seals suitable for long distance pipeline natural gas compressor
Device, effectively to lift the combination property of the long distance pipeline natural gas compressor dry gas seals.
The dry gas sealing device of the utility model long distance pipeline natural gas compressor, it is characterized in that the periphery of rotary shaft by
Side medium is placed with one-level end face seal unit, two grades of end face seal units and isolating seal list to atmospheric side successively vertically
Member, and series winding is provided with labyrinth seal unit between I and II sealing unit.Described firsts and seconds end face seal unit
In, the corresponding rotary packing ring and stationary seal ring being oppositely arranged with coaxial line mode shaft end are each included respectively, its is relative
It is respectively its corresponding end face seal position between end face, wherein the rotary packing ring of the two is respectively through corresponding drive mechanism and rotation
Axle is connected；The stationary seal ring of the two is respectively through corresponding spring and the axial float support of throw-out collar in the one of respective stationary seat
Side end position；Described labyrinth seal unit, is included in the connection one-level end face seal unit and two grades of end face seal lists
In the gas passage of both ends of the surface sealing position in member, it is respectively arranged in gas passage having between relative wall and stretches convex top
Comb structure body and can therewith small―gap suture coordinate sealing structure layer；Described isolating seal unit, including axially position
Broach ring seat and the broach ring for being arranged at its radially inner side, the broach of broach ring internal side diameter stretch convex top with that can be rotated with rotary shaft
Rotary body external cylindrical surface between surface, cooperation is diametrically set with small―gap suture.Small―gap suture described in the utility model is matched somebody with somebody
Close, generally, its gap width coordinated is advisable with being not more than 0.5 millimeter.
In said structure, the sealing structure layer that the relative small―gap suture of nose coordinates, one are stretched with the broach of the comb structure body
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 aluminium 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 be directly in 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 broach cooperated
Structure and sealing structure layer can then 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 cooperated and sealing structure layer be preferably provided with position, can select respectively
The inner hole structure face of the first stationary seat in the channel section with diametrically 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 broach 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 can then be located at
The first relative stationary seat（Stationary side）Side surface side.
Described isolating seal unit, preferably using bipartite form.Wherein, broach ring seat may include with
Shaft end contact contact interior broach ring seat and outer broach ring seat, its radially inner side respectively through attachment structure be connected with interior broach ring and
Outer broach ring；The outer located structure of broach ring seat realizes axial restraint with fixed structure location fit.Described and inside and outside broach ring
The broach of radially inner side stretches convex top, and described small is respectively similarly between the external cylindrical surface for the rotary body that can be rotated with axle
Gap coordinates.
The dry gas sealing device of the above-mentioned long distance pipeline natural gas compressor of the utility model primary seal and security seal it
Between set up one of labyrinth seal, a small amount of process gas leaked out by primary seal is close by labyrinth lateral pressure slightly higher two grades
Vapour lock gear is sealed, sealing gas carrying liquid of driving can be avoided, while can ensure that two grades of leakage gas are free of natural gas, it is entirely avoided air
With the mixing of natural gas, the safety of station is thoroughly ensure that, the security of dry gas seals operation is improved, extends dry gas seals
Service life.And secondary seal gas remains injection, it can be always ensured that secondary seal is carried on the back in the driving and parking of compressor
Pressure.Secondary seal back pressure is lifted, and is also at utmost reduced the possibility that secondary seal bears back-pressure in shutdown process, is improved
The security of dry gas seals operation, extends dry gas seals service life.In addition, former sealing structure isolation gas need to use big flow
Air injects, and the flow velocity that result in entrance broach is too fast, easily causes mist of oil and is blown into secondary leakage chamber by high velocity air, makes two grades
Sealing is polluted by bearing oil, adds the probability of its failure.On the basis of the utility model said structure sealing device, such as
Isolation gas is further done using nitrogen, it is possible to decrease the flow of isolation gas, on the one hand can reduce lubricant pollution sealing and fail
Hidden danger, on the other hand make lubricating oil no longer ingress of air, will also significantly improve the life-span of lubricating oil.
Therefore, the dry gas sealing device of the long distance pipeline natural gas compressor of form described in the utility model, can be well
The special operation condition and environment of long distance pipeline natural gas system are adapted to, the reliable and stable synthesis of its compressor dry gas seals is effectively lifted
Performance.
Below in conjunction with the embodiment by accompanying drawing illustrated embodiment, the above of the present utility model is remake into one
The detailed description of step.But the scope that this should not be interpreted as to the above-mentioned theme of the utility model is only limitted to following example.Do not taking off
In the case of the above-mentioned technological thought of the utility model, the various replacements made according to ordinary skill knowledge and customary means
Or change, it all should be included in the range of the utility model.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of structure of the dry gas sealing device of the utility model long distance pipeline natural gas compressor.
Embodiment
The basic structure of the dry gas sealing device of the utility model long distance pipeline natural gas compressor as depicted, be
The periphery of rotary shaft 28, one-level end face seal unit, two grades of end face seals are placed with by side medium to atmospheric side successively vertically
Unit and isolating seal unit, and also series winding is provided with labyrinth seal unit between I and II sealing unit.
Include the first rotary packing ring and the first static seal that coaxial spool end is oppositely arranged 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 through trundle
26 is circumferentially fixed with axle sleeve 1, and realization is connected with rotary shaft 28, is axially contacted with the step surface of axle sleeve 1 and by the first rotating ring
11 axial compressions of seat；First stationary seal ring 3 is through the first spring 6 and the axial float support of the first throw-out collar 5 in the one of the first stationary seat 8
Side（It is left side in figure）End position；
Include the second rotary packing ring 12 and that coaxial spool end is oppositely arranged in two grades of described end face seal units
It is second end face sealing position between two stationary seal rings 13, its opposing end surface.Second rotary packing ring 12 is by swelling in clamping sleeve 29
On external cylindrical surface, axially contacted with the step surface of rotating seat 11 and be compacted 29 axial compressions of set, circumferential and the first rotating seat 11
Drive connection, realization is connected with rotary shaft 28；Second stationary seal ring 13 is axially floating through 16 and second throw-out collar of second spring 15
The dynamic side for being supported in the second stationary seat 18（It is right side in figure）End position；
Described labyrinth seal unit is arranged on for connecting the first end face sealing position in the two-stage sealing unit
In gas passage 7 between second end face sealing position.The wall of the gas passage 7 is respectively by the described He of the first stationary seat 8
Opposed configuration face between second rotating seat 11 is constituted.Have in the channel in the diametrically channel section of conduit wall, using broach
The comb structure body 10 of loop type is arranged at the peripheral structure face of the second rotating seat 11 of radially inner side position, matched
Then it is located at the relative position in the inner hole structure face of the first stationary seat 8 of radial outside using the sealing structure layer 9 of surface spraying.
The thickness of sealing structure layer 9 is 150 microns, and roughness is not higher than the high-abrasive material coating such as 12.5 microns aluminium alloy, its surface
Coordinated with stretching between convex top for relative comb structure body 10 with the small―gap suture in radially unilateral 0.1 millimeter of gap.
Isolating seal unit by axially position broach ring seat and be arranged at the broach ring group of its radially inner side into.Broach ring
Seat is included with the interior broach ring seat 20 and outer broach ring seat 21 of shaft end contact.The radially inner side of interior broach ring seat 20 is through screw
It is connected with interior broach ring 25；The outer radially inner side of broach ring seat 21 has outer broach ring 23 through mode connects for screw.Its China and foreign countries' broach ring seat 21
Through corresponding annular recess structure between its external cylindrical surface and cavity fixed structure 27, make isolating seal list with clamp location structure 22
The axial restraint of member on the whole.The broach of the interior radially inner side of broach ring 25 stretches convex top and the broach axle sleeve that can be rotated with axle 28
（Rotary body）30 external cylindrical surface is coordinated with the small―gap suture in radially unilateral 0.1 millimeter of gap；The comb of the outer radially inner side of broach ring 23
Tooth stretches convex top and the locking nut that can be rotated with axle 28（Rotary body）24 external cylindrical surface is with radially unilateral 0.1 millimeter of gap
Small―gap suture coordinates.
Above-mentioned one-level end face seal unit, two grades of end face seal units and axle sleeve 1 and rotary shaft in isolating seal unit
28 step end face contact is realized after axially position, vertically successively through clamping sleeve 29, broach axle sleeve from side medium to atmospheric side
30 and locking nut 24 contacted with opposing end surface, and tightened by locking nut 24, realize the overall fixation on axle of sealing device.
Outer broach ring seat 21 and the annular recess structure of cavity fixed structure 27 are respectively embedded into by clamp location structure 22, realize that sealing is whole
Body axial restraint on cavity.
Claims (10)
1. the dry gas sealing device of long distance pipeline natural gas compressor, it is characterized in that in rotary shaft（28）Periphery by side medium to
Atmospheric side is placed with one-level end face seal unit, two grades of end face seal units and isolating seal unit successively vertically, one, two
Also series winding is provided with labyrinth seal unit between level sealing unit, wherein
Include the first rotary packing ring that coaxial spool end is oppositely arranged in described one-level end face seal unit（2）It is quiet with first
Sealing ring（3）, it is first end face sealing position, the first rotary packing ring between its relative end face（3）Warp beam sleeve（1）With rotary shaft
（28）Drive connection, the first stationary seal ring（3）Through the first spring（6）With the first throw-out collar（5）Axial float support is in the first stationary ring
Seat（8）Side end position；
Include the second rotary packing ring that coaxial spool end is oppositely arranged in two grades of described end face seal units（12）With second
Stationary seal ring（13）, it is second end face sealing position, the second rotary packing ring between its opposing end surface（12）With can be with rotary shaft（28）
The second rotating seat rotated（11）Drive connection, the second stationary seal ring（13）Through second spring（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 of face seal portion position（7）In, it is respectively arranged at gas passage（7）There is the comb for stretching convex top between middle relative wall
Teeth formations（10）With can therewith small―gap suture coordinate sealing structure layer（9）；
Described isolating seal unit includes the broach ring seat of axially position and is arranged at the broach ring of its radially inner side, broach
The broach of ring internal side diameter stretches convex top and can be with rotary shaft（28）The rotary body external cylindrical surface of rotation is coordinated with small―gap suture.
2. dry gas sealing device as claimed in claim 1, it is characterized in that gas passage in the labyrinth seal unit（7）By institute
The first stationary seat of relative position is 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 cooperated（10）With sealing structure layer（9）It is located at the first stationary seat respectively（8）With
Two rotating seats（11）Opposed configuration face on.
3. dry gas sealing device as claimed in claim 2, it is characterized in that the described comb structure body cooperated（10）
With sealing structure layer（9）It is located at respectively with the first stationary seat in the diametrically channel section of conduit wall（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, it 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, it 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 broach ring.
6. dry gas sealing device as claimed in claim 1, it is characterized in that the broach ring seat in the isolating seal unit includes
The interior broach ring seat contacted with shaft end（20）With outer broach ring seat（21）, its radially inner side is connected with interior comb through attachment structure respectively
Ring gear（25）With outer broach ring（23）, outer broach ring seat（21）Located structure（22）Realized axially with fixed structure location fit
It is fixed, the inside and outside broach ring（25,23）The broach of radially inner side stretch convex top respectively with can be with axle（28）The rotation of rotation
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, it is characterized in that the broach of the comb structure body stretches nose
Small―gap suture between relative structure layer surface matches somebody with somebody the fit clearance value being combined into and is not more than 0.5 millimeter.
8. the dry gas sealing device as described in one of claim 1 to 6, it 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, it 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, it 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 |
|---|---|---|---|
| CN201720200375.1U CN206600472U (en) | 2017-03-03 | 2017-03-03 | The dry gas sealing device of long distance pipeline natural gas compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720200375.1U CN206600472U (en) | 2017-03-03 | 2017-03-03 | The dry gas sealing device of long distance pipeline natural gas compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206600472U true CN206600472U (en) | 2017-10-31 |
Family
ID=60147807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720200375.1U Active CN206600472U (en) | 2017-03-03 | 2017-03-03 | The dry gas sealing device of long distance pipeline natural gas compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206600472U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678371A (en) * | 2017-03-03 | 2017-05-17 | 四川日机密封件股份有限公司 | Dry gas sealing device of long-distance pipeline natural gas compressor |
-
2017
- 2017-03-03 CN CN201720200375.1U patent/CN206600472U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678371A (en) * | 2017-03-03 | 2017-05-17 | 四川日机密封件股份有限公司 | Dry gas sealing device of long-distance pipeline natural gas compressor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106678371A (en) | Dry gas sealing device of long-distance pipeline natural gas compressor | |
| CN1776264B (en) | A sealing device for a rotor shaft, especially a bearing structure with still lubrication | |
| CN103459904B (en) | Shaft sealer | |
| CN104989830B (en) | Multistage magnetic liquid sealing device for sealing liquid | |
| CN105422863B (en) | A kind of liquid oxygen pump sealer with assembled | |
| CA2335691C (en) | Pressurized chamber seal cartridge | |
| CN103459903A (en) | Shaft seal insert | |
| CN103925373B (en) | A kind of mazy type shuts down bilateral sealing device | |
| CN206600472U (en) | The dry gas sealing device of long distance pipeline natural gas compressor | |
| CN104482215A (en) | Shaft-end multiple seal of centrifugal compressor | |
| CN209959492U (en) | Sealing structure of steam centrifugal compressor | |
| CN103925368B (en) | A kind of mazy type shutdown sealing device | |
| CN116480584B (en) | Oil seal and air seal device for dry vacuum pump and rotary machine | |
| CN219432054U (en) | Oil seal and air seal device for dry vacuum pump and rotary machine | |
| CA2648039C (en) | Floating fluid film seals | |
| CN212120402U (en) | Explosion-proof type decanter centrifuge based on carbocycle is sealed | |
| CN101604877B (en) | Rotary motor | |
| CN102661287B (en) | Fireproof and leakproof system for high-temperature centrifugal pump | |
| CN205639619U (en) | Combined sealing device for liquid oxygen pump | |
| CN209959545U (en) | Centrifugal vapor compressor combination formula seal structure of MVR | |
| CN211039683U (en) | Main shaft sealing structure in centrifugal machine | |
| CN205824177U (en) | A kind of Thermal generation unit hermetic seal oil catch | |
| CN110681498A (en) | Explosion-proof type decanter centrifuge based on carbocycle is sealed | |
| CN214998063U (en) | Oil transfer pump isolation device for preventing oil leakage in oil transfer pump | |
| CN213899888U (en) | Carbon ring mechanical sealing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 610045 Sichuan city of Chengdu province Wuhou District Vuko Xisi Road No. 8 Patentee after: Zhongmi Holding Co., Ltd Address before: 610045 Sichuan city of Chengdu province Wuhou District Vuko Xisi Road No. 8 Patentee before: Sichuan Sunny Seal Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder |