CN106352094A - Static pressure gas labyrinth throttle regulating mechanism for both dynamic and static pressure dry gas seals - Google Patents
Static pressure gas labyrinth throttle regulating mechanism for both dynamic and static pressure dry gas seals Download PDFInfo
- Publication number
- CN106352094A CN106352094A CN201610687480.2A CN201610687480A CN106352094A CN 106352094 A CN106352094 A CN 106352094A CN 201610687480 A CN201610687480 A CN 201610687480A CN 106352094 A CN106352094 A CN 106352094A
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- China
- Prior art keywords
- labyrinth seal
- air inlet
- labyrinth
- seal
- ring
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
Abstract
The invention provides a static pressure gas labyrinth throttle regulating mechanism for both dynamic and static pressure dry gas seals, wherein a third radial air inlet and an axial throttle hole are both formed in a static sealing ring, the third radial air inlet is communicated with a labyrinth seal, and is located at a comb area of the labyrinth seal, the axial throttle hole is communicated with a pressure groove of a seal end surface, the other end is sealed tightly by countersunk bolts; the interior of the labyrinth seal is provided a second radial air inlet by processing, a static pressure gas cavity is formed among the outer circle of the labyrinth seal, an intrinsic pressure cover and a stationary seal ring, a first radial air inlet and a second radial air inlet are both connected with the static pressure gas cavity; the inner circle of the labyrinth seal is provided with two sealing rings, gases entering the labyrinth seal can only flow into the third radial throttle hole, a third sealing ring is arranged between the outer circle of the throttle hole and the intrinsic pressure cover, a first sealing ring is arranged between the static ring and the interior pressing cover; the labyrinth end nearing the exterior press cover is provided with a spring for a regulator. which drives the labyrinth seal to slide along the outer circle of the static ring, thereby achieving the gas static pressure regulating function through the third radial air inlet.
Description
(1) technical field
The present invention relates to the design of sound die mould dry gas sealing structure and application are and in particular to a kind of be used for sound die mould
The pressurized air labyrinth throttling regulating and controlling mechanism of dry gas seals, is particularly well-suited to be in the axle head of the slewing 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, research worker 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 the rotor dynamic balancing performance of unit to a great extent, 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 little needed for will being formed
Gap is must be requested that had sufficiently high rotating speed by sealing unit, otherwise, sealing property will decline, or even cannot normal work.
For solving problems, Chinese scholars propose pure hydrostatic profile and hybrid type Sealing Technology it is ensured that dry gas seals are low
End face still can be realized under speed conditions open, it is to avoid end wear.
The formation of sound die mould Dry Gas Seal air film and stable, the main dynamic pressure unlatching being produced by end face dynamic pressure groove
Power and extraneous supply enter the static pressure opening force that end face balancing slit provides to realize, but most oil refining, petrochemical industry, change at present
Operating mode residing for the industry Higher-end machines equipment such as work, metallurgy and pharmacy is complicated and changeable, and the method processing variable working condition is often to adjust
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 of dry gas seals and stability are put forward higher requirement, and current technology cannot meet this requirement.
(3) content of the invention
The present invention will overcome the disadvantages mentioned above of prior art, provides a kind of achievable sound die mould Dry Gas Seal all to press
The pressurized air labyrinth throttling regulating and controlling mechanism of the online regulation and control of supply static pressure in groove.This regulating and controlling mechanism utilizes labyrinth seal technology, leads to
Cross the mutation to sound die mould dry gas seals system supply gas pressure and carry out buffered, improve dry gas seals and adapt to operation operating mode spy
It is not pressure medium and the situation of envelope atmospheric pressure rapid fluctuation, greatly improve operation stability and the 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 against
Outer press cover 4, against housing 23, rotating ring 11 is arranged between housing 23 and axle sleeve 10 in the left side of internal gland 1, and stationary ring 9 is arranged on interior
Between gland 1 and outer press cover 4 it is characterised in that:
The side deviating from seal face on rotating ring 11 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 the one end in the 3rd radial air inlet hole 18 is with labyrinth seal 20 even
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；Axial one end of throttle orifice 16 is connected 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 all 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 interior
Between gland 1, the 3rd sealing ring 6 is set, stops gas in pressurized air chamber from leaking into atmospheric side, the inner circumferential of labyrinth seal 20
Two ends are each to arrange the second sealing ring 19, and the gas entering labyrinth seal 20 can only flow into the 3rd radial direction throttle orifice 18, stationary ring 9 with interior
First sealing ring 17 is set between gland 1, stops gas in pressurized air chamber from leaking into the annular seal space of dry gas seals；Labyrinth seal
Near external seal gland one end equipped with regulating and controlling mechanism spring 7, different according to pressurized air cavity pressure promote labyrinth seal 20
Produce along stationary ring 9 outer circumference surface and slide axially, thus change axial location in labyrinth seal 20 for the 3rd radial air inlet hole 18,
Adjust the gas-static in the 3rd radial air inlet hole 18, the air pressure of regulation and control 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 this rotary shaft.
Preferably, the axial spacing span between the comb of labyrinth seal and comb is 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, regulation and control are set by experimentation or numbered analog simulation analysis
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 inlet 21 will smoothly flow into the 3rd radial air inlet hole 18 it is necessary to first flow through more comb, bears larger flowing
Resistance, the gas pressure therefore finally flowing into the 3rd radial air inlet hole 18 will keep a stable pressure, rather than with the external world
Supply gas pressure increases suddenly and increases, and the gas pressure therefore passing through axial throttle orifice 16 entrance seal face balancing slit will not
Produce and drastically raise, but a kind of metastable static pressure of mitigation acts on end face；If conversely, passing through the first radial direction pore 2
Flow into the pressure drop in pressurized air chamber, the spring-force driven dual labyrinth seal of modulated mechanism will be breakked away to sealing medium side or high pressure
Dynamic, will not be produced by the gas pressure that axial throttle orifice 16 enters seal face balancing slit and drastically decline, thus achieve
Online real-time monitoring and the buffered of supply gas pressure or envelope atmospheric pressure mutation is it is ensured that sound die mould dry gas seals to external world
Long time stability runs.
The method have the advantages that
Provided by the present invention for the pressurized air labyrinth throttling regulating and controlling mechanism of sound die mould dry gas seals, close using labyrinth
The mutation sealing supply gas pressure to external world carries out dash adjustment process.Extraneous supply gas pressure passes through labyrinth seal radial air inlet hole and enters
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, form static pressure opening force in end face；During this period, seal extraneous institute supplied gas to flow through
The sealing number of teeth can by change labyrinth seal axial displacement realize.Labyrinth seal axial direction two ends are supplied by the external world respectively
Pressure and the effect of spring force, make 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 flows through increases, and throttle effect strengthens, so that the gas pressure entering the 3rd radial air inlet hole slowly declines,
Avoid the gas pressure reaching stationary ring axial admission hole to increase severely, eliminate static pressure opening force and cross the increase cause of ambassador's seal face gap
Make the hidden danger of leakage；On the contrary, if gas pressure diminishes suddenly, the axial thrust acting in labyrinth seal is led to be less than design bullet
Spring force, then labyrinth seal will overcome first, second sealing ring drag to pressurized air intracavity side or high pressure side shifting, now,
The sealing number of teeth that gas flows through reduces, and throttle effect weakens, so that the gas pressure entering 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 reaching stationary ring air inlet is too small to lead to static pressure opening force not enough, the problems such as seal face contact wear
Produce.Therefore, this pressurized air labyrinth throttles the real-time online of regulating and controlling mechanism supply gas pressure or envelope atmospheric pressure mutation to external world
Regulation and control are with buffered it can be ensured that the long time stability of sound die mould dry gas seals runs, with traditional sound die mould dry gas
Sealing is compared with remarkable advantage.
(4) brief description
Fig. 1 carries the dynamic and static pressure dry gas sealing device schematic diagram of labyrinth seal throttle structure for the present invention.
Fig. 2 is labyrinth seal cross section structure stress diagram of the present invention.
Wherein:
1 internal gland；2 first radial air inlet holes；3 connecting bolts；4 outer press covers；Static seal between outer press cover in 5
Circle；6 the 3rd sealing rings；7 regulating and controlling mechanism springs；8 dormant bolts；9 stationary rings；10 axle sleeves；11 rotating rings；12 push away
Ring；13 mark closely screw；14 dry gas seals thrust springs；15 rotating seats；16 axial throttle orifices；17 first sealings
Circle；18 the 3rd radial air inlet holes；19 second sealing rings；20 labyrinth seals；21 second radial air inlet holes；22 is intrinsic pressure
Static seal between lid and housing；23 housings.
(5) specific embodiment
Below in conjunction with the accompanying drawings technical scheme is described in detail.
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 against
Outer press cover 4, against housing 23, rotating ring 11 is arranged between housing 23 and axle sleeve 10 in the left side of internal gland 1, and stationary ring 9 is arranged on interior
Between gland 1 and outer press cover 4 it is characterised in that:
The side deviating from seal face on rotating ring 11 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 the one end in the 3rd radial air inlet hole 18 is with labyrinth seal 20 even
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；Axial one end of throttle orifice 16 is connected 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 all 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
Between 1, the 3rd sealing ring 6 is set, stops gas in pressurized air chamber from leaking into atmospheric side, the two ends of the inner circumferential of labyrinth seal 20
Each setting the second sealing ring 19, the gas entering labyrinth seal 20 can only flow into the 3rd radial direction throttle orifice 18, stationary ring 9 and internal gland
First sealing ring 17 is set between 1, stops gas in pressurized air chamber from leaking into the annular seal space of dry gas seals；Labyrinth seal is close
Equipped with regulating and controlling mechanism spring 7, different according to pressurized air cavity pressure promote labyrinth seals 20 along quiet for external seal gland one end
Ring 9 outer circumference surface produces and slides axially, and thus changes axial location in labyrinth seal 20 for the 3rd radial air inlet hole 18, adjusts
The gas-static in the 3rd radial air inlet hole 18, the air pressure of regulation and control seal face.
The present invention adopts labyrinth seal throttle mechanism to realize the tune to sound die mould Dry Gas Seal static pressure supply gas pressure
Control, it is to avoid the sealing that extraneous air supply pressure fluctuation causes runs unstability, has more compared with traditional sound die mould dry gas seals
Good capacity of resisting disturbance.
Further, the axial spacing span between the comb of labyrinth seal and comb is 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 of the way of realization to inventive concept, and protection scope of the present invention should not
When being seen as limited by stated concrete form, 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 throttling regulating and controlling mechanism for sound die mould dry gas seals, the right side of internal gland (1) against
Outer press cover (4), against housing (23), rotating ring (11) is arranged between housing (23) and axle sleeve (10), quiet in the left side of internal gland (1)
Ring (9) be arranged between internal gland (1) and outer press cover (4) it is characterised in that:
The side deviating from seal face on rotating ring (11) 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 arranged on axle sleeve (10) by marking closely screw (13)；
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 in the 3rd radial air inlet hole (18) axially throttles
The side in hole (16)；One end of axial throttle orifice (16) is connected with the balancing slit of seal face, and the other end is sealed by dormant bolt (8)
Sternly；Form pressurized air chamber, the first radial air inlet hole (2) between the periphery of labyrinth seal (20) and internal gland (1), stationary ring (9)
All 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；Between the periphery of labyrinth seal (20) and internal gland (1), the 3rd sealing ring (6) is set, stops pressurized air
In chamber, gas leaks into atmospheric side, and the two ends of the inner circumferential of labyrinth seal (20) are each to arrange the second sealing ring (19), enters labyrinth close
The gas of envelope (20) can only flow into the 3rd radial direction throttle orifice (18), arranges the first sealing ring between stationary ring (9) and internal gland (1)
(17) gas in pressurized air chamber, is stoped 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 in labyrinth seal (20) for the 3rd radial air inlet hole (18), adjust the 3rd radial direction and enter
The gas-static of pore (18), the air pressure of regulation and control seal face.
2. it is used for the pressurized air labyrinth throttling regulating and controlling mechanism of sound die mould dry gas seals as claimed in claim 1, it is special
Levy and be: the axial spacing span between the comb of labyrinth seal and comb be 0.15～0.25mm, labyrinth seal with quiet
Radial clearance span between ring is 0.20～0.35mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610687480.2A CN106352094B (en) | 2016-08-18 | 2016-08-18 | Pressurized air labyrinth throttling regulating and controlling mechanism for sound die mould dry gas seals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610687480.2A CN106352094B (en) | 2016-08-18 | 2016-08-18 | Pressurized air labyrinth throttling regulating and controlling mechanism for sound die mould dry gas seals |
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| Publication Number | Publication Date |
|---|---|
| CN106352094A true CN106352094A (en) | 2017-01-25 |
| CN106352094B CN106352094B (en) | 2017-12-29 |
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|---|---|---|---|
| CN201610687480.2A Active CN106352094B (en) | 2016-08-18 | 2016-08-18 | Pressurized air labyrinth throttling regulating and controlling mechanism for sound die mould dry gas seals |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949190A (en) * | 2017-05-27 | 2017-07-14 | 中国工程物理研究院总体工程研究所 | Floating ring type damping seal device |
| CN109798361A (en) * | 2019-03-05 | 2019-05-24 | 浙江工业大学 | A kind of adaptive static pressure dry gas sealing structure of band axial direction relief valve |
| CN113775759A (en) * | 2021-08-31 | 2021-12-10 | 浙江工业大学 | Dry gas sealing static ring structure with built-in combination of slide valve and film throttler |
| CN114135673A (en) * | 2021-09-29 | 2022-03-04 | 浙江工业大学 | Vacuum suction type dry gas sealing structure based on Bernoulli principle |
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| CN102959287A (en) * | 2011-10-27 | 2013-03-06 | 三菱重工业株式会社 | Dry gas sealing structure |
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| CN104896104A (en) * | 2015-05-25 | 2015-09-09 | 浙江工业大学 | Online adjustable closing force gas lubricating mechanical sealing device |
| CN206092973U (en) * | 2016-08-18 | 2017-04-12 | 浙江工业大学 | A gaseous maze throttle regulation and control mechanism of static pressure for static and dynamic pressure type dry gas is sealed |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH04258576A (en) * | 1991-02-08 | 1992-09-14 | Toshiba Corp | Shaft seal device |
| US20130277917A1 (en) * | 2002-06-21 | 2013-10-24 | Inpro/Seal Llc | Shaft Seal Assembly |
| US20100225065A1 (en) * | 2008-08-29 | 2010-09-09 | Petroleo Brasileiro S.A.-Petrobras | Compact restictive seal for bearing housings |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949190A (en) * | 2017-05-27 | 2017-07-14 | 中国工程物理研究院总体工程研究所 | Floating ring type damping seal device |
| CN109798361A (en) * | 2019-03-05 | 2019-05-24 | 浙江工业大学 | A kind of adaptive static pressure dry gas sealing structure of band axial direction relief valve |
| CN109798361B (en) * | 2019-03-05 | 2024-03-26 | 浙江工业大学 | Self-adaptive static pressure dry gas sealing structure with axial pressure release valve |
| CN113775759A (en) * | 2021-08-31 | 2021-12-10 | 浙江工业大学 | Dry gas sealing static ring structure with built-in combination of slide valve and film throttler |
| CN113775759B (en) * | 2021-08-31 | 2024-01-12 | 浙江工业大学 | Sliding valve and film restrictor combined built-in dry gas sealing static ring structure |
| CN114135673A (en) * | 2021-09-29 | 2022-03-04 | 浙江工业大学 | Vacuum suction type dry gas sealing structure based on Bernoulli principle |
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| CN106352094B (en) | 2017-12-29 |
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