CN104864099B - Combined seal system for cold gas blower - Google Patents
Combined seal system for cold gas blower Download PDFInfo
- Publication number
- CN104864099B CN104864099B CN201510245916.8A CN201510245916A CN104864099B CN 104864099 B CN104864099 B CN 104864099B CN 201510245916 A CN201510245916 A CN 201510245916A CN 104864099 B CN104864099 B CN 104864099B
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- Prior art keywords
- shell
- hole
- helixseal
- labyrinth seal
- tooth
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/102—Shaft sealings especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention discloses a combined sealing system for a cold gas blower, belongs to the type of rotating main shaft sealing methods and devices of magnetic fluid and is suitable for sealing of medium gas conveying under the conditions of high temperature, high pressure, high rotating speed and the like. The sealing device is composed of a magnetic conduction shaft sleeve, a labyrinth seal shell, a spiral seal shell, a pole shoe, a permanent magnet, a holding frame, a gland, a socket head screw cap, an outer shell, a sealing ring and the like. The combined sealing system is characterized in that a labyrinth seal is formed by annular teeth on the labyrinth seal shell and the magnetic conduction shaft sleeve; a spiral seal is formed by the spiral seal shell and a spiral groove in the magnetic conduction shaft sleeve; a magnetic fluid seal is formed by the pole shoe, the permanent magnet, magnetic fluid and the annular teeth on the magnetic conduction shaft sleeve. The labyrinth seal has the function of reducing pressure, the spiral seal has the function of cooling, and therefore the sealing work of the main seal magnetic fluid is more stable, and the service life of the whole sealing device is prolonged.
Description
Technical field
The present invention relates to magnetic fluid live spindle technical field of sealing technology is and in particular to a kind of Cool gas blower combination sealing system
System.
Background technology
Cool gas blower is a kind of pump class device of pumping gas, and the transmission main shaft of this pump mainly adopts dry gas seals at present,
But have the disadvantage that (1) dry gas seals there must be sealing operating gas, and blanket gass are known from experience entrance annular seal space and mixed with medium
Closing, so being directed to some special medias, being not suitable for sealing from the type；(2) need relatively costly sealing aid system (close
Envelope gas balance system), and overall manufacturing cost is high, the bad maintenance of equipment.
Content of the invention
Instant invention overcomes the deficiencies in the prior art, one kind is provided not need outside help gas, it is to avoid foreign aid's gas enters
Annular seal space is mixed with medium, simultaneously easy to maintenance, reduces the Cool gas blower combination sealing system of cost.
For solving above-mentioned technical problem, the present invention employs the following technical solutions:
A kind of Cool gas blower combination sealing system, including magnet fluid sealing assembly, helixseal shell, comb tooth labyrinth seal
Shell, magnetic conduction axle sleeve, axially position block and be socketed in the shell outside described magnetic conduction axle sleeve and sealing ring；Described inside the shell sets
It is equipped with comb tooth labyrinth seal shell, described shell one end is fixed with gland；The other end is connected by flange, is fixed on seal cavity
On；Described comb tooth labyrinth seal shell is located at the media end near sealing gas, by the first pin-and-hole on comb tooth labyrinth seal shell
Prevent from circumferentially rotating with the first bayonet fittings on shell, described comb tooth labyrinth seal shell is provided with return-air hole, described return-air
Hole and the venthole centering being arranged on shell；It is provided with annular tooth on described comb tooth labyrinth seal shell；Helixseal shell is located at
Between comb tooth labyrinth seal shell and magnet fluid sealing assembly, by the second pin-and-hole on helixseal shell and comb tooth labyrinth seal shell
On the second bayonet fittings prevent axle circumference dynamic；Described magnetic conductive axis put and are provided with helical tooth, described helixseal shell with described
The helical tooth that magnetic conductive axis put forms helixseal；First hole, described first hole and shell are provided with described helixseal shell
On the second hole centering；3rd hole, the 4th hole centering on described 3rd hole and shell are provided with described helixseal shell.
Further technical scheme is to be provided with the first leak and the second leak on helixseal shell.
Further technical scheme is to be provided with the 5th hole on shell.
Further technical scheme is that magnet fluid sealing assembly includes magnetic conduction axle sleeve, the first pole shoe, the second pole shoe, permanent magnetism
Body, retainer and magnetic liquid；First cooling water inlet hole, the second cooling water inlet hole are provided with described shell, first go out
Water hole and the second apopore；The groove of described first cooling water inlet hole and described first pole shoe forms cooling-water duct, and described the
Two cooling water inlet holes form cooling-water duct with the groove of described second pole shoe.
Further technical scheme is that magnetic conductive axis put and are provided with the first unilateral bevel tooth and the second unilateral bevel
Tooth, described first unilateral bevel tooth, the second unilateral bevel tooth and described second pole shoe, described first pole shoe, permanent magnet and
Magnetic fluid forms magnetic fluid sealing structure.
Further technical scheme be annular tooth on comb tooth labyrinth seal shell be rectangle, in triangle, zigzag
A kind of.
Further technical scheme is the helical tooth that the helical tooth that magnetic conductive axis put is backpitch.
Further technical scheme be helical tooth be rectangular coil tooth.
Further technical scheme is the rear portion that helixseal shell is arranged on described comb tooth labyrinth seal shell；Described magnetic current
Body black box is arranged on the outside of described helixseal shell.
Further technical scheme is that permanent magnet is arranged between described first pole shoe and the second pole shoe, described retainer
It is arranged on outside described permanent magnet.
Lower mask body introduces the sealing principle of the present invention:
The comb tooth labyrinth seal shell being provided close to dielectric gas end is initially introduced into inside the shell, using interference fits, by gland
The power being transmitted through carries out axial restraint, and the pin-and-hole on comb tooth labyrinth seal shell and the bayonet fittings on shell prevent from circumferentially rotating,
Ensure comb tooth labyrinth seal shell return-air hole and venthole centering, because comb tooth labyrinth seal is not subject to rotary speed and temperature simultaneously
Limit, be non-contact seals, friction power loss is minimum, increase the gas of the salable elevated pressures of comb number of teeth mesh.
Its sealing principle is when gas flows through the throttling of comb tooth labyrinth seal shell from the pump chamber of high-pressure side with high flow velocity
Enter labyrinth chamber after narrow slit to expand, the speed energy that gas flows through narrow slit formation is consumed with this, by this principle through repeatedly
Throttling and expansion produce resistance, stop gas from leaking out, thus reaching the purpose of sealing.Because the method is not that zero leakage is close
Envelope, so can reduce the pressure of comb tooth labyrinth seal shell outlet, another aspect comb tooth labyrinth seal by the method one side
A small amount of gas revealed can be reclaimed by the return-air hole on shell and venthole, reduces the pressure of follow-up seal cavity.
Is that spiral is close in the middle of the pole shoe (or claiming the first pole shoe) of comb tooth labyrinth seal shell and magnet fluid sealing assembly
Capsule, the helicla flute composition helixseal that it is put with magnetic conductive axis, equally adopt interference fits to load inside the shell, close by spiral
Pin-and-hole on capsule prevents from circumferentially rotating with the bayonet fittings on comb tooth labyrinth seal shell, ensures helixseal shell first hole simultaneously
With the second hole centering on shell it is contemplated that axial symmetry, now the on the 3rd hole on rotating screw capsul and shell
The also centering of four holes, on the one hand helixseal shell plays fixing and compression comb tooth labyrinth seal shell effect, is on the other hand passed by gland
The power come carries out itself axial restraint.Helixseal is affected by the speed of mainshaft, when main shaft is static it is contemplated that magnetic conductive axis put
Helicla flute and helixseal shell between there is radial clearance, cooling water flows through spiral by the 5th hole on shell and the second hole
The cavity of helixseal shell is entered, a part is direct from cavity bottom the 3rd hole of helixseal shell behind the first hole on capsul
Flow to the 4th hole on shell, be then out outer tank；Another part cooling water flow out of after helixseal shell cavity from spiral shell
On rotation capsul, the first leak opened and the second leak flow out, and flow out to outer tank through the 4th hole on shell, both drop
The low temperature of magnetic conduction axle sleeve and main shaft, plays cooling effect, has completely cut off the contact that gas is with magnetic fluid again.When main shaft rotation
When, cooling water enters helixseal shell after the 5th hole on shell and the second hole flow through the first hole on helixseal shell
Cavity, the now similar helicla flute pump of helicla flute, make fluid produce pressure head, stop fluid leakage in pump, put due to magnetic conductive axis
There is radial clearance between helicla flute and helixseal shell, still have segment fluid flow to cross screw thread tooth top and leak out, now greatly
Segment fluid flow directly flows directly to the 4th hole shell from cavity bottom the 3rd hole of helixseal shell, is then out outside
Water tank；The first leak and the second leakage that another part is opened after cooling water flow out of helixseal shell cavity from helixseal shell
Hole is flowed out, and flows out to outer tank through the 4th hole on shell, had equally both reduced the temperature of magnetic conduction axle sleeve and main shaft, plays cold
But act on, completely cut off the contact that gas is with magnetic fluid again.
Be magnet fluid sealing assembly near external environment condition end, by magnetic conduction axle sleeve, pole shoe, pole shoe (or claim second pole shoe),
Permanent magnet, retainer and magnetic liquid composition, the first cooling water inlet hole on shell and the second cooling water inlet hole and magnetic current
The pole shoe of body black box, pole shoe groove composition cooling-water duct, cooling water to magnet fluid sealing assembly cooling after from shell
On the first apopore and the second apopore flow out it is ensured that the steady operation of magnet fluid sealing.
Compared with prior art, the invention has the beneficial effects as follows: the present invention do not need outside help gas, it is to avoid foreign aid's gas
Enter annular seal space to mix with medium, compensate for the deficiency of dry gas seals it is adaptable to pump various dielectric gas, fully achieve zero
Leakage, extends service life of equipment, easy to maintenance, reduces cost.
Brief description
Fig. 1 is the structural representation of one embodiment of the invention.
Specific embodiment
All features disclosed in this specification, or disclosed all methods or during step, except mutually exclusive
Feature and/or step beyond, all can combine by any way.
Any feature disclosed in this specification (including any accessory claim, summary and accompanying drawing), except non-specifically is chatted
State, all can be replaced by other alternative features equivalent or that there is similar purpose.I.e., unless specifically stated otherwise, each feature
It is a series of equivalent or one of similar characteristics example.
Below in conjunction with the accompanying drawings and embodiment is described in detail to the specific embodiment of the present invention.
As shown in figure 1, according to one embodiment of present invention, the present embodiment discloses a kind of Cool gas blower combination sealing system
System, it comprises comb tooth labyrinth seal, helixseal, magnet fluid sealing, wherein labyrinth seal and helixseal play auxiliary seal
Effect, magnet fluid sealing plays primary seal effect.Pressure and temperature in view of the dielectric gas of actual fed is all higher, in design
Employ the measure such as decompression and cooling.
The present embodiment Cool gas blower combination sealing system, by magnetic conduction axle sleeve 1, comb tooth labyrinth seal shell 2, helixseal shell 6,
Pole shoe 11, pole shoe 16, permanent magnet 13, retainer 14, gland 17, soket head cap screw 18, shell 29, axially position block 20 and
Sealing ring 3 grade forms.
It is provided with comb tooth labyrinth seal shell 2, comb tooth labyrinth seal shell 2 is located at the medium near sealing gas in shell 29
End, prevents from circumferentially rotating with the first pin 31 cooperation on shell 29 by the first pin-and-hole 32 on comb tooth labyrinth seal shell 2, outward
Shell 29 one end is fixed with gland 17 by soket head cap screw 18；The other end is connected by flange, is fixed in seal cavity；Sealing
Circle 3 is located at the link position of flange and seal cavity, stops dielectric gas toward outward leakage；Axially position block 20 passes through interference fit
It is fixed on main shaft 30, prevent magnetic conduction axle sleeve 1 from moving axially；Return-air hole 4 is provided with comb tooth labyrinth seal shell 2, return-air hole 4 with
It is arranged on venthole 5 centering on shell；It is provided with annular tooth on comb tooth labyrinth seal shell 2；Specifically, annular tooth be rectangle,
One of triangle, zigzag.
In one end of medium in pump chamber, comb tooth labyrinth seal shell 2 is loaded in shell 29, passed to spiral by gland 17
Power on capsul 6 is fixed to comb tooth labyrinth seal shell 2, when gases at high pressure flow through the section of comb tooth labyrinth seal shell 2
Enter labyrinth chamber after stream narrow slit to expand, the speed energy that gas flows through narrow slit formation is consumed with this, by this principle through excessive
Secondary throttling and expansion produce resistance, stop gas from leaking out, thus reaching the purpose of sealing.Because the method is not zero leakage
Sealing, so can reduce the pressure of comb tooth labyrinth seal shell outlet by the method one side, another aspect comb tooth labyrinth is close
A small amount of gas revealed can be reclaimed by the return-air hole 4 on capsule, reduces the pressure of follow-up seal cavity.
Helixseal shell 6 is located between comb tooth labyrinth seal shell 2 and magnet fluid sealing assembly, by helixseal shell 6
The second pin-and-hole 34 and comb tooth labyrinth seal shell 2 on the second pin 33 cooperation prevent from circumferentially rotating；The power being transmitted by gland 17
Carry out axial compression to fix；Helical tooth 9,36, the helical tooth that helixseal shell 6 and magnetic conductive axis put are provided with magnetic conduction axle sleeve 1
Form helixseal；First hole 7, the second hole 8 centering on the first hole 7 and shell are provided with helixseal shell 6；Helixseal
3rd hole 26, the 4th hole 25 centering on the 3rd hole 26 and shell are provided with shell 6.
First leak 24 and the second leak 28 are additionally provided with helixseal shell 6, on the first leak and shell
Seven apertures in the human head 27 centering on 6th hole 23 centering, the second leak and shell.
When the temperature of sealing medium gas is higher, the temperature making main shaft can be raised by this, thus having influence on magnetic fluid
Sealing effectiveness, for this reason, adding helixseal shell 6 at the rear portion of comb tooth labyrinth seal shell 2, it with magnetic conduction axle sleeve 1 on spiral
Groove (or claim helical tooth) 9 and 36 composition helixseal, and be passed through cooling water main shaft is cooled down, when main shaft is static, cooling
Water enters helixseal cavity by the first hole 7 on hole the 5th hole 10 on shell, the second hole 8 and helixseal shell 6, realizes
Cooling to main shaft 30, the water of part leakage passes through the first leak 24 on helixseal shell 6 and the second leak 28, outer
The 6th hole 23 on shell, seven apertures in the human head 27 and the 4th hole 25 flow out to outer tank, have both reduced magnetic conduction axle sleeve 1 and the temperature of main shaft 30
Degree, plays cooling effect, has completely cut off the contact that gas is with magnetic fluid again, and this provides reliable condition for the sealing of magnetic fluid.
As the spindle turns, cooling water passes through the 5th hole 10 on shell and the second hole 8 flows through on helixseal shell 6 the
Enter the cavity of helixseal shell behind one hole 7, now helicla flute 9,36 is similar to helicla flute pump, make fluid produce pressure head, stop pump
, be there is radial clearance between the helicla flute 9,36 being put due to magnetic conductive axis and helixseal shell 6, still have part in interior fluid leakage
Fluid is crossed screw thread tooth top and is leaked out, and now most of fluid is directly straight from cavity bottom the 3rd hole 26 of helixseal shell 6
Connect the 4th hole 25 flowing on shell, be then out outer tank；After another part cooling water flow out of helixseal shell cavity
The first leak 24 opened from helixseal shell 6 and the second leak 28 flow out, and flow out to through the 4th hole 25 on shell 29
Outer tank, had equally both reduced the temperature of magnetic conduction axle sleeve and main shaft, played cooling effect, had completely cut off gas and magnetic fluid again
Contact.
Outside in helixseal shell 6 installs magnet fluid sealing assembly, and magnet fluid sealing assembly is by magnetic conduction axle sleeve 1, pole shoe
11st, pole shoe 16, permanent magnet 13, retainer 14 and magnetic liquid composition, magnetic conduction axle sleeve 1 is provided with the first unilateral bevel tooth
35 and the second unilateral bevel tooth 19, it is close that the first unilateral bevel tooth and the first pole shoe, permanent magnet and magnetic fluid form magnetic fluid
Envelope, the second unilateral bevel tooth and the second pole shoe, permanent magnet and magnetic fluid composition magnet fluid sealing.
For guaranteeing in the case of high-revolving, the caloric value of magnetic current body running is not too large, the first cooling on shell 29
Water inlet hole 12 and the second cooling water inlet hole 15 are cooled down with the pole shoe 11 of magnet fluid sealing assembly, the groove composition of pole shoe 16
Aquaporin, cooling water flows to the first apopore 21 from shell 29 and the second apopore 22 after the cooling of magnet fluid sealing assembly
Go out the steady operation it is ensured that magnet fluid sealing, it is achieved thereby that the zero leakage of sealing, prevent the poisonous medium gas pair sealing
The pollution of environment.The present embodiment is applicable not only to Cool gas blower, and is applied to the sealing conveying various dielectric gas.
" embodiment ", " another embodiment ", " embodiment " spoken of in this manual, etc., refer to tie
Specific features, structure or the feature of closing the description of this embodiment include at least one embodiment in the description of the application generality
In.Multiple local appearance statement of the same race in the description is not necessarily to refer to same embodiment.Furthermore, it is understood that combine appointing
When one embodiment describes specific features, structure or feature, to be advocated is to realize this with reference to other embodiment
Plant feature, structure or feature also to fall within the scope of the present invention.
Although reference be made herein to invention has been described for the multiple explanatory embodiments invented, however, it is to be understood that this
Skilled person can be designed that a lot of other modifications and embodiment, and these modifications and embodiment will fall in the application
Within disclosed spirit and spirit.More specifically, in the range of disclosure claim, can be to theme group
Close the building block of layout and/or layout carries out multiple modifications and improvement.Except the modification that building block and/or layout are carried out
Outer with improving, to those skilled in the art, other purposes also will be apparent from.
Claims (10)
1. a kind of Cool gas blower combination sealing system, including magnet fluid sealing assembly, helixseal shell (6), magnetic conduction axle sleeve (1),
Axially position block (20) and the shell (29) and the sealing ring (3) that are socketed in described magnetic conduction axle sleeve (1) outside；It is characterized in that:
Described inside the shell is provided with comb tooth labyrinth seal shell (2), and described shell (29) one end is fixed with gland (17)；The other end passes through
Flange connects, and is fixed in seal cavity；Described comb tooth labyrinth seal shell (2) is located at the media end near sealing gas, passes through
The first pin-and-hole (32) on comb tooth labyrinth seal shell (2) prevents from circumferentially rotating with the first pin (31) cooperation on shell (29),
Return-air hole (4), described return-air hole (4) and the venthole (5) being arranged on shell are provided with described comb tooth labyrinth seal shell (2)
Centering；It is provided with annular tooth on described comb tooth labyrinth seal shell (2)；Helixseal shell (6) be located at comb tooth labyrinth seal shell (2) and
Between magnet fluid sealing assembly, by the on the second pin-and-hole (34) on helixseal shell (6) and comb tooth labyrinth seal shell (2)
Two pins (33) cooperation prevents from circumferentially rotating；It is provided with helical tooth (9) and (36), described spiral is close on described magnetic conduction axle sleeve (1)
The helical tooth that capsule (6) is put with described magnetic conductive axis forms helixseal；It is provided with the first hole on described helixseal shell (6)
(7), the second hole (8) centering on described first hole (7) and shell；It is provided with the 3rd hole (26) on described helixseal shell (6),
The 4th hole (25) centering on described 3rd hole (26) and shell.
2. Cool gas blower combination sealing system according to claim 1 is it is characterised in that on described helixseal shell (6)
It is provided with the first leak (24) and the second leak (28).
3. Cool gas blower combination sealing system according to claim 1 is it is characterised in that be provided with described shell
Five holes (10).
4. Cool gas blower combination sealing system according to claim 1 is it is characterised in that described magnet fluid sealing assembly
Including magnetic conduction axle sleeve (1), the first pole shoe (11), the second pole shoe (16), permanent magnet (13), retainer (14) and magnetic liquid；Institute
State and the first cooling water inlet hole (12), the second cooling water inlet hole (15), the first apopore (21) and second are provided with shell
Apopore (22)；Described first cooling water inlet hole (12) forms cooling-water duct with the groove of described first pole shoe (11), described
Second cooling water inlet hole (15) forms cooling-water duct with the groove of described second pole shoe (16).
5. Cool gas blower combination sealing system according to claim 4 is it is characterised in that set on described magnetic conduction axle sleeve (1)
It is equipped with the first unilateral bevel tooth and the second unilateral bevel tooth, the described first unilateral bevel tooth, the second unilateral bevel tooth
Form magnetic fluid sealing structure with described second pole shoe, described first pole shoe, permanent magnet and magnetic fluid.
6. Cool gas blower combination sealing system according to claim 1 is it is characterised in that described comb tooth labyrinth seal shell
(2) annular tooth on is one of rectangle, triangle, zigzag.
7. Cool gas blower combination sealing system according to claim 1 is it is characterised in that on described magnetic conduction axle sleeve (1)
Helical tooth (9) and (36) are the helical tooths of backpitch.
8. the Cool gas blower combination sealing system according to claim 1 or 7 is it is characterised in that described helical tooth (9,36)
It is rectangular coil tooth.
9. Cool gas blower combination sealing system according to claim 1 is it is characterised in that described helixseal shell (6) sets
Put the rear portion in described comb tooth labyrinth seal shell (2)；Described magnet fluid sealing assembly is arranged on the outer of described helixseal shell (6)
Portion.
10. Cool gas blower combination sealing system according to claim 4 is it is characterised in that described permanent magnet (13) is arranged
Between described first pole shoe (11) and the second pole shoe (16), described retainer (14) is arranged on outside described permanent magnet (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510245916.8A CN104864099B (en) | 2015-05-14 | 2015-05-14 | Combined seal system for cold gas blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510245916.8A CN104864099B (en) | 2015-05-14 | 2015-05-14 | Combined seal system for cold gas blower |
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| CN104864099A CN104864099A (en) | 2015-08-26 |
| CN104864099B true CN104864099B (en) | 2017-01-25 |
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| CN201510245916.8A Active CN104864099B (en) | 2015-05-14 | 2015-05-14 | Combined seal system for cold gas blower |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465373B (en) * | 2016-01-28 | 2017-10-13 | 自贡兆强环保科技股份有限公司 | A kind of high performance magnetic liquid sealing structure |
| CN106369169B (en) * | 2016-10-27 | 2018-02-16 | 北京交通大学 | The reactor magnetic fluid seal device of vapor-proof |
| CN106402402B (en) * | 2016-11-03 | 2018-05-08 | 北京交通大学 | Stagger arrangement type labyrinth cools down reaction kettle magnetic fluid seal device |
| CN106678372A (en) * | 2016-11-03 | 2017-05-17 | 北京交通大学 | Magnetic liquid sealing device suitable for reaction kettle |
| CN107956880B (en) * | 2017-12-13 | 2019-08-09 | 广西科技大学 | A kind of magnetic fluid sealing structure |
| CN108626403A (en) * | 2018-06-25 | 2018-10-09 | 杭州新亚低温科技有限公司 | A kind of twin-stage phase transformation labyrinth seal structure |
| CN109751238B (en) * | 2019-02-22 | 2024-03-08 | 郑州沃华机械有限公司 | Melt gear pump and sealing structure thereof |
| CN110131419B (en) * | 2019-05-30 | 2024-05-31 | 自贡兆强密封制品实业有限公司 | Reciprocating type magnetic liquid combined sealing device |
| CN112483748B (en) * | 2020-11-17 | 2022-09-20 | 杭州慧翔电液技术开发有限公司 | Magnetic fluid sealing device capable of realizing multi-stage gas shunting |
| CN113028067B (en) * | 2021-03-04 | 2022-02-11 | 清华大学 | Self-adaptive labyrinth sealing device for high-speed shaft |
| CN113074254B (en) * | 2021-04-15 | 2022-08-02 | 西华大学 | High-speed magnetic fluid sealing device for high-temperature working condition |
| CN114483928B (en) * | 2022-01-27 | 2023-07-25 | 大连华锐重工集团股份有限公司 | Main drive speed reducer of high-speed shield tunneling machine |
| CN114483638A (en) * | 2022-02-28 | 2022-05-13 | 浙江省机电设计研究院有限公司 | Magnetic liquid sealing device for centrifugal pump |
| CN114854965A (en) * | 2022-05-23 | 2022-08-05 | 西华大学 | Vacuum high-temperature heat treatment device for sealing unidirectional stretching magnetic fluid |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2391058Y (en) * | 1999-06-04 | 2000-08-09 | 北京航空航天大学 | Combined sealing device |
| JP2007053844A (en) * | 2005-08-17 | 2007-03-01 | Asmo Co Ltd | Fan motor |
| RU2330994C2 (en) * | 2006-05-16 | 2008-08-10 | Открытое акционерное общество "Климов" | Centrifugal compressor |
| JP5599194B2 (en) * | 2010-01-29 | 2014-10-01 | ミネベア株式会社 | Bearing device |
| JP2013130086A (en) * | 2011-12-20 | 2013-07-04 | Mitsubishi Heavy Ind Ltd | Centrifugal fluid machine |
| CN202659484U (en) * | 2012-05-23 | 2013-01-09 | 自贡兆强环保科技股份有限公司 | Flexible shock-resistance mechanical sealing device |
| CN204729633U (en) * | 2015-05-14 | 2015-10-28 | 自贡兆强密封制品实业有限公司 | Cool gas blower combination sealing system |
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2015
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