CN206092973U - A gaseous maze throttle regulation and control mechanism of static pressure for static and dynamic pressure type dry gas is sealed - Google Patents
A gaseous maze throttle regulation and control mechanism of static pressure for static and dynamic pressure type dry gas is sealed Download PDFInfo
- Publication number
- CN206092973U CN206092973U CN201620909396.6U CN201620909396U CN206092973U CN 206092973 U CN206092973 U CN 206092973U CN 201620909396 U CN201620909396 U CN 201620909396U CN 206092973 U CN206092973 U CN 206092973U
- Authority
- CN
- China
- Prior art keywords
- labyrinth seal
- inlet hole
- air inlet
- radial
- labyrinth
- 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.)
- Withdrawn - After Issue
Links
- 230000003068 static effect Effects 0.000 title abstract description 19
- 230000033228 biological regulation Effects 0.000 title abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 210000004907 gland Anatomy 0.000 claims abstract description 22
- 230000001276 controlling effect Effects 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 239000011148 porous material Substances 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000035772 mutation Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Landscapes
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
A gaseous maze throttle regulation and control mechanism of static pressure for static and dynamic pressure type dry gas is sealed, radial inlet port of third and axial orifice all set up in the stationary seal ring, and the radial inlet port of third communicates with each other with labyrinth seals, and the broach that is located labyrinth seals is regional, and the axial orifice communicates with the equalization tank of seal face, and the other end is obturaged by countersink bolt, the inside processing of labyrinth seals has the radial inlet port of second, forms the gaseous chamber of static pressure between periphery and inner pressing cover, the quiet ring, and the radial inlet port of first radial inlet port and second all communicates with static pressure gas chamber, labyrinth seals sets up the twice sealing washer interior week, and the gas that gets into labyrinth seals can only flow in the radial orifice of third, sets up the third sealing washer between its periphery and the inner pressing cover, sets up first sealing washer between quiet ring and the inner pressing cover, the outer gland one end of being close to labyrinth seals is equipped with regulation and control mechanism spring, makes labyrinth seals follow quiet ring outer peripheral face according to the gaseous cavity pressure of static pressure and produces endwise slip, realize the gaseous static pressure regulation and control through the radial inlet port of third.
Description
(1) technical field
The present invention relates to the design of sound die mould dry gas sealing structure and application, and in particular to one kind is used for sound die mould
The pressurized air labyrinth throttling regulating and controlling mechanism of dry gas seals, the shaft end of the slewing being particularly well-suited under the conditions of variable working condition
Sealing device.
(2) background technology
Dry gas seals are a kind of rotary-type sealing devices, because having aneroid, low leakage, environmental protection, energy-conservation, long-life spy
Point, researcher attempts to adopt dry gas seals in more rotary machine dynamic sealings.But find through practice and theory analysis,
The stability of dry gas seals depends not only upon to a great extent the rotor dynamic balancing performance of unit, and depends on dry gas seals
The minimum speed of rotating ring.Trace it to its cause, be because that dry gas seals require the contactless operating of small―gap suture, and it is little needed for being formed
Gap, must be requested that have sufficiently high rotating speed by sealing unit, otherwise, sealing property will decline, or even cannot normal work.
To solve problems, Chinese scholars propose pure hydrostatic profile and hybrid type Sealing Technology, it is ensured that dry gas seals are low
Can still realize that end face is opened under speed conditions, it is to avoid end wear.
The formation of sound die mould Dry Gas Seal air film and stable, the main dynamic pressure unlatching produced by end face dynamic pressure groove
Power and extraneous supply are realized into the static pressure opening force of end face balancing slit offer, but majority oil refining at present, petrochemical industry, change
Operating mode residing for the industry Higher-end machines equipment such as work, metallurgy and pharmacy is complicated and changeable, and the method for processing variable working condition is often adjusted
The extraneous supply gas pressure of end face, the regulation of exactly this ambient pressure makes static pressure there is the situation of mutation, and this is to sound die mould
The adaptability and stability of dry gas seals is put forward higher requirement, and at present technology cannot meet this requirement.
(3) content of the invention
The present invention will overcome the disadvantages mentioned above of prior art, there is provided a kind of achievable sound die mould Dry Gas Seal is pressed
The pressurized air labyrinth throttling regulating and controlling mechanism that static pressure regulates and controls online is supplied in groove.The regulating and controlling mechanism utilizes labyrinth seal technology, leads to
Crossing the mutation to sound die mould dry gas seals system supply gas pressure carries out buffered, improves dry gas seals and adapts to operation operating mode spy
It is not the situation of pressure medium and envelope atmospheric pressure rapid fluctuation, greatly improves the operation stability and reliability of dry gas seals.
The present invention is to be achieved through the following technical solutions：
A kind of pressurized air labyrinth throttling regulating and controlling mechanism for sound die mould dry gas seals, the right side of internal gland 1 abuts
Outer press cover 4, the left side of internal gland 1 abuts housing 23, and rotating ring 11 is arranged between housing 23 and axle sleeve 10, and stationary ring 9 is arranged on interior
Between gland 1 and outer press cover 4, it is characterised in that：
Side on rotating ring 11 away from seal face is provided with throw-out collar 12, dry gas seals thrust spring 14, and throw-out collar 12 is arranged
In the chute of rotating seat 15, rotating seat 15 is arranged on axle sleeve 10 by marking closely screw 13；
The outer circumference surface of stationary ring 9 is provided with labyrinth seal 20, and one end and the labyrinth seal 20 in the 3rd radial air inlet hole 18 connect
Lead to, and be always positioned at the comb region of labyrinth seal, the side of the axial throttle orifice 16 of other end connection in the 3rd radial air inlet hole 18
Face；One end of axial throttle orifice 16 connects with the balancing slit of seal face, and the other end is obturaged by dormant bolt 8；Labyrinth seal 20
Periphery and internal gland 1, stationary ring 9 between form pressurized air chamber, the first radial air inlet hole 2 and the second radial air inlet hole 21 with
Pressurized air chamber connects, the other end connection supply source of the gas in the first radial air inlet hole 2, and the second radial air inlet hole 21 is arranged on labyrinth
The inside of sealing 20, the other end in the second radial air inlet hole 21 connects the outer circumference surface of stationary ring 9；The periphery of labyrinth seal 20 with it is interior
3rd sealing ring 6 is set between gland 1, prevents gas in pressurized air chamber from leaking into atmospheric side, the inner circumferential of labyrinth seal 20
Two ends respectively arrange the second sealing ring 19, and the gas into labyrinth seal 20 can only flow into the 3rd radial air inlet hole 18, stationary ring 9 with it is interior
First sealing ring 17 is set between gland 1, prevents gas in pressurized air chamber from leaking into the annular seal space of dry gas seals；Labyrinth seal
Regulating and controlling mechanism spring 7 is housed near external seal gland one end, different according to pressurized air cavity pressure promote labyrinth seal 20
Produce along the outer circumference surface of stationary ring 9 and slide axially, thus change axial location of the 3rd radial air inlet hole 18 in labyrinth seal 20,
The gas-static in the 3rd radial air inlet hole 18 is adjusted, regulates and controls the air pressure of seal face.
Radial direction alleged by the present invention refers to the radial direction of stationary ring or rotating ring, and the axial direction alleged by the present invention refers to stationary ring or rotating ring
Rotary shaft or the direction parallel to the rotary shaft.
Preferably, the axial spacing span between the comb and comb of labyrinth seal be 0.15～0.25mm, labyrinth
Radial clearance span between sealing and stationary ring is 0.20～0.35mm.
According to the design theory of sound die mould dry gas seals, by experimental study or numbered analog simulation analysis setting regulation and control
The elastic force of structure spring.When extraneous supply gas pressure produces fluctuation, such as increase, then in pressurized air cavity pressure
The lower labyrinth seal 20 of effect will compress regulating and controlling mechanism spring 7, and to atmospheric side or low pressure Slideslip, now by the second radial direction
The gas of air admission hole 21 will smoothly flow into the 3rd radial air inlet hole 18 it is necessary to first flow through more comb, bear larger flowing
Resistance, therefore finally flow into the gas pressure in the 3rd radial air inlet hole 18 and will keep a stable pressure, rather than with the external world
Supply gas pressure increases suddenly and increases, therefore the gas pressure for entering seal face balancing slit by axial throttle orifice 16 will not
Generation is drastically raised, but a kind of metastable static pressure of mitigation acts on end face；If conversely, passing through the first radial direction pore 2
The pressure drop in pressurized air chamber is flowed into, the labyrinth seal of modulated mechanism's spring-force driven dual will break away to sealing medium side or high pressure
Dynamic, the gas pressure for entering seal face balancing slit by axial throttle orifice 16 will not be produced and drastically declined, and be thus achieved
Online real-time monitoring and buffered that to external world supply gas pressure or envelope atmospheric pressure are mutated, it is ensured that sound die mould dry gas seals
Long time stability runs.
The invention has the advantages that：
It is close using labyrinth provided by the present invention for the pressurized air labyrinth throttling regulating and controlling mechanism of sound die mould dry gas seals
Row buffering regulation process is entered in the mutation for sealing supply gas pressure to external world.Extraneous supply gas pressure is entered by labyrinth seal radial air inlet hole
Labyrinth seal seals tooth, flows through some labyrinth seal sealing teeth and reaches the 3rd radial air inlet hole or stationary ring radial air inlet hole, and leads to
Cross axial throttle orifice and flow into end face balancing slit, in end face static pressure opening force is formed；During this period, seal extraneous institute supplied gas to flow through
The sealing number of teeth can be by changing the axial displacement of labyrinth seal realizing.Labyrinth seal axial direction two ends are supplied respectively by the external world
The effect of pressure and spring force, makes it act on the axial thrust in labyrinth seal more than design if extraneous supply gas pressure is uprushed
Spring force, then labyrinth seal will overcome first, second sealing ring drag to low-pressure side or air side shifting, compression spring, gas
The sealing number of teeth that body is flowed through increases, and throttle effect strengthens, so that the gas pressure into the 3rd radial air inlet hole slowly declines,
Avoid the gas pressure for reaching stationary ring axial admission hole from increasing severely, eliminate static pressure opening force and cross the increase cause of ambassador's seal face gap
Make the hidden danger of leakage；If conversely, gas pressure diminishes suddenly, causing the axial thrust acted in labyrinth seal to be less than design bullet
Spring force, then labyrinth seal will overcome first, second sealing ring drag on the inside of pressurized air chamber or high pressure side shifting, now,
The sealing number of teeth that gas is flowed through is reduced, and throttle effect weakens, so that the gas pressure into the 3rd radial air inlet hole is unlikely to
Drastically decline, and by labyrinth seal to high-pressure side moving influence pressurized air intracavity gas by pressurized in increasing a little, thus
Can avoid that the gas pressure for reaching stationary ring air admission hole is too small to cause static pressure opening force not enough, the problems such as seal face contact wear
Produce.Therefore, this pressurized air labyrinth throttling regulating and controlling mechanism to external world supply gas pressure or envelope atmospheric pressure mutation it is online in real time
Regulation and control and buffered, it can be ensured that the long time stability operation of sound die mould dry gas seals, with traditional sound die mould dry gas
Sealing is compared with remarkable advantage.
(4) illustrate
Fig. 1 is dynamic and static pressure dry gas sealing device schematic diagram of the present invention with labyrinth seal throttle structure.
Fig. 2 is labyrinth seal cross section structure stress diagram of the present invention.
Wherein：
1-internal gland；2-the first radial air inlet hole；3-connecting bolt；4-outer press cover；Static seal between 5-interior outer press cover
Circle；6-the three sealing ring；7-regulating and controlling mechanism spring；8-dormant bolt；9-stationary ring；10-axle sleeve；11-rotating ring；12-push away
Ring；13-mark closely screw；14-dry gas seals thrust spring；15-rotating seat；16-axial throttle orifice；17-the first sealing
Circle；18-the three radial air inlet hole；19-the second sealing ring；20-labyrinth seal；21-the second radial air inlet hole；22-internal pressure
Static seal between lid and housing；23-housing.
(5) specific embodiment
Technical scheme is described in detail below in conjunction with the accompanying drawings.
See figures.1.and.2：
A kind of pressurized air labyrinth throttling regulating and controlling mechanism for sound die mould dry gas seals, the right side of internal gland 1 abuts
Outer press cover 4, the left side of internal gland 1 abuts housing 23, and rotating ring 11 is arranged between housing 23 and axle sleeve 10, and stationary ring 9 is arranged on interior
Between gland 1 and outer press cover 4, it is characterised in that：
Side on rotating ring 11 away from seal face is provided with throw-out collar 12, dry gas seals thrust spring 14, and throw-out collar 12 is arranged
In the chute of rotating seat 15, rotating seat 15 is arranged on axle sleeve 10 by marking closely screw 13；
The outer circumference surface of stationary ring 9 is provided with labyrinth seal 20, and one end and the labyrinth seal 20 in the 3rd radial air inlet hole 18 connect
Lead to, and be always positioned at the comb region of labyrinth seal, the side of the axial throttle orifice 16 of other end connection in the 3rd radial air inlet hole 18
Face；One end of axial throttle orifice 16 connects with the balancing slit of seal face, and the other end is obturaged by dormant bolt 8；Labyrinth seal 20
Periphery and internal gland 1, stationary ring 9 between form pressurized air chamber, the first radial air inlet hole 2 and the second radial air inlet hole 21 with
Pressurized air chamber connects, the other end connection air in the first radial air inlet hole 2, and the second radial air inlet hole 21 is arranged on labyrinth seal
20 inside, the other end in the second radial air inlet hole 21 connects the outer circumference surface of stationary ring 9；The periphery of labyrinth seal 20 and internal gland
3rd sealing ring 6 is set between 1, prevents gas in pressurized air chamber from leaking into atmospheric side, the two ends of the inner circumferential of labyrinth seal 20
Each to arrange the second sealing ring 19, the gas into labyrinth seal 20 can only flow into the 3rd radial air inlet hole 18, stationary ring 9 and internal gland
First sealing ring 17 is set between 1, prevents gas in pressurized air chamber from leaking into the annular seal space of dry gas seals；Labyrinth seal is close
External seal gland one end is equipped with regulating and controlling mechanism spring 7, and different according to pressurized air cavity pressure promote labyrinth seal 20 along quiet
The outer circumference surface of ring 9 is produced and slid axially, and thus changes axial location of the 3rd radial air inlet hole 18 in labyrinth seal 20, is adjusted
The gas-static in the 3rd radial air inlet hole 18, regulates and controls the air pressure of seal face.
The present invention realizes the tune to sound die mould Dry Gas Seal static pressure supply gas pressure using labyrinth seal throttle mechanism
Control, it is to avoid the sealing operation unstability that extraneous air supply pressure fluctuation causes, has more compared with traditional sound die mould dry gas seals
Good antijamming capability.
Further, the axial spacing span between the comb and comb of labyrinth seal be 0.15～0.25mm, labyrinth
Radial clearance span between sealing and stationary ring is 0.20～0.35mm.
Content described in this specification is only enumerating for the way of realization to inventive concept, and protection scope of the present invention should not
When stated concrete form is seen as limited by, protection scope of the present invention also includes those skilled in the art according to the present invention
Design it is conceivable that equivalent technologies mean.
Claims (2)
1. a kind of pressurized air labyrinth for sound die mould dry gas seals throttles regulating and controlling mechanism, and the right side of internal gland (1) abuts
Outer press cover (4), the left side of internal gland (1) abuts housing (23), and rotating ring (11) is arranged between housing (23) and axle sleeve (10), quiet
Ring (9) is arranged between internal gland (1) and outer press cover (4), it is characterised in that：
Side on rotating ring (11) away from seal face is provided with throw-out collar (12), dry gas seals thrust spring (14), throw-out collar (12)
It is arranged in the chute of rotating seat (15), rotating seat (15) is by marking closely screw (13) on axle sleeve (10)；
The outer circumference surface of stationary ring (9) is provided with labyrinth seal (20), the one end in the 3rd radial air inlet hole (18) and labyrinth seal
(20) connect, and be always positioned at the comb region of labyrinth seal, the other end connection axially throttling in the 3rd radial air inlet hole (18)
The side in hole (16)；One end of axial throttle orifice (16) connects with the balancing slit of seal face, and the other end is sealed by dormant bolt (8)
Sternly；Pressurized air chamber, the first radial air inlet hole (2) are formed between the periphery of labyrinth seal (20) and internal gland (1), stationary ring (9)
Connect with pressurized air chamber with the second radial air inlet hole (21), the other end connection supply source of the gas in the first radial air inlet hole (2),
Second radial air inlet hole (21) is arranged on the inside of labyrinth seal (20), the other end connection stationary ring in the second radial air inlet hole (21)
(9) outer circumference surface；3rd sealing ring (6) is set between the periphery of labyrinth seal (20) and internal gland (1), pressurized air is prevented
Gas leaks into atmospheric side in chamber, and the two ends of the inner circumferential of labyrinth seal (20) respectively arrange the second sealing ring (19), close into labyrinth
The gas of envelope (20) can only flow into the 3rd radial air inlet hole (18), and between stationary ring (9) and internal gland (1) the first sealing ring is arranged
(17) gas in pressurized air chamber, is prevented to leak into the annular seal space of dry gas seals；Labyrinth seal is near outer press cover one end equipped with tune
Control mechanism's spring (7), different according to pressurized air cavity pressure promote labyrinth seal (20) to produce along stationary ring (9) outer circumference surface
Slide axially, thus change axial location of the 3rd radial air inlet hole (18) in labyrinth seal (20), adjust the 3rd radial direction and enter
The gas-static of pore (18), regulates and controls the air pressure of seal face.
2. the pressurized air labyrinth throttling regulating and controlling mechanism of sound die mould dry gas seals, its feature are used for as claimed in claim 1
It is：Axial spacing span between the comb and comb of labyrinth seal is 0.15～0.25mm, labyrinth seal and stationary ring
Between radial clearance span be 0.20～0.35mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620909396.6U CN206092973U (en) | 2016-08-18 | 2016-08-18 | A gaseous maze throttle regulation and control mechanism of static pressure for static and dynamic pressure type dry gas is sealed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620909396.6U CN206092973U (en) | 2016-08-18 | 2016-08-18 | A gaseous maze throttle regulation and control mechanism of static pressure for static and dynamic pressure type dry gas is sealed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206092973U true CN206092973U (en) | 2017-04-12 |
Family
ID=58468447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620909396.6U Withdrawn - After Issue CN206092973U (en) | 2016-08-18 | 2016-08-18 | A gaseous maze throttle regulation and control mechanism of static pressure for static and dynamic pressure type dry gas is sealed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206092973U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106352094A (en) * | 2016-08-18 | 2017-01-25 | 浙江工业大学 | Static pressure gas labyrinth throttling regulation and control mechanism for dynamic and static pressure type dry gas seal |
| CN108692031A (en) * | 2018-06-01 | 2018-10-23 | 大连久泰密封有限公司 | A kind of friction pair of dry gas seals |
-
2016
- 2016-08-18 CN CN201620909396.6U patent/CN206092973U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106352094A (en) * | 2016-08-18 | 2017-01-25 | 浙江工业大学 | Static pressure gas labyrinth throttling regulation and control mechanism for dynamic and static pressure type dry gas seal |
| CN106352094B (en) * | 2016-08-18 | 2017-12-29 | 浙江工业大学 | Static pressure gas labyrinth throttling regulation and control mechanism for dynamic and static pressure type dry gas seal |
| CN108692031A (en) * | 2018-06-01 | 2018-10-23 | 大连久泰密封有限公司 | A kind of friction pair of dry gas seals |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106352094B (en) | Static pressure gas labyrinth throttling regulation and control mechanism for dynamic and static pressure type dry gas seal | |
| CN101776152B (en) | Outside pressurized type dynamic and static pressure gas lubricating and sealing device | |
| JP6513809B2 (en) | Shaft seal device for fluid machine and method of sealing shaft of fluid machine | |
| CN106122484B (en) | Built-in sealing medium throttling regulation and control device for dynamic and static pressure type dry gas seal | |
| CN104896104B (en) | A kind of online adjustable gas lubrication mechanically-sealing apparatus of closing force | |
| CN104989830B (en) | Multistage magnetic liquid sealing device for sealing liquid | |
| CN204692588U (en) | The gas lubrication mechanical seal device that a kind of closing force is adjustable online | |
| CN203784293U (en) | Mechanical sealing device | |
| CN206092973U (en) | A gaseous maze throttle regulation and control mechanism of static pressure for static and dynamic pressure type dry gas is sealed | |
| CN103452897A (en) | Modified air seal structure | |
| CN107725784A (en) | A kind of long-life low leakage finger tip high temperature fluid medium combination sealing arrangement | |
| CN109826960A (en) | A kind of axial multilayer runner superposition reflux pumping mechanical seal structure | |
| CN206280505U (en) | For the built-in sealing medium throttling regulation device of sound die mould dry gas seals | |
| CN103047171B (en) | The global function throttling arrangement that floats | |
| CN104696301A (en) | Hydraulic allocator for end face flow allocation | |
| CN103803305A (en) | Double-sealed rotary valve | |
| CN201326750Y (en) | Triple eccentric high-pressure metal seal butterfly valve | |
| CN201344261Y (en) | Labyrinth sealing structure with auricle-shaped groove | |
| CN209705276U (en) | A kind of axial multilayer runner superposition reflux pumping mechanical seal structure | |
| CN210422903U (en) | High-rotating-speed axial plunger pump | |
| CN205001515U (en) | Design has bearing seal of labyrinth seals structure | |
| CN209539554U (en) | A kind of oil free screw compressor support end structure | |
| CN207393570U (en) | Centrifugal air pump with edge seal structure | |
| CN105927542A (en) | Rotor shaft seal structure for double-screw compressor | |
| CN206958265U (en) | A kind of stop valve of service life length |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170412 Effective date of abandoning: 20171229 |
|
| AV01 | Patent right actively abandoned |