CN106352094B - Static pressure gas labyrinth throttling regulation and control mechanism for dynamic and static pressure type dry gas seal - Google Patents
Static pressure gas labyrinth throttling regulation and control mechanism for dynamic and static pressure type dry gas seal Download PDFInfo
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- CN106352094B CN106352094B CN201610687480.2A CN201610687480A CN106352094B CN 106352094 B CN106352094 B CN 106352094B CN 201610687480 A CN201610687480 A CN 201610687480A CN 106352094 B CN106352094 B CN 106352094B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 19
- 230000033228 biological regulation Effects 0.000 title claims abstract description 8
- 230000003068 static effect Effects 0.000 title abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 38
- 210000004907 gland Anatomy 0.000 claims abstract description 25
- 230000001105 regulatory effect Effects 0.000 claims abstract description 14
- 230000001276 controlling effect Effects 0.000 claims description 14
- 230000002265 prevention Effects 0.000 claims 1
- 244000126211 Hericium coralloides Species 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 230000008844 regulatory mechanism 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
- 230000001965 increasing effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram 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
- 230000002708 enhancing effect Effects 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
- 238000000034 method 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The static pressure gas labyrinth throttling regulation mechanism is used for dynamic and static pressure type dry gas sealing, a third radial air inlet hole and an axial throttling hole are both arranged in a sealing static ring, the third radial air inlet hole is communicated with the labyrinth seal and is positioned in a comb tooth area of the labyrinth seal, the axial throttling hole is communicated with a pressure equalizing groove on the sealing end surface, and the other end of the axial throttling hole is tightly sealed by a countersunk head bolt; a second radial air inlet is processed in the labyrinth seal, a static pressure air cavity is formed between the periphery of the labyrinth seal and the inner gland as well as between the periphery of the labyrinth seal and the static ring, and the first radial air inlet and the second radial air inlet are both communicated with the static pressure air cavity; two sealing rings are arranged on the inner periphery of the labyrinth seal, gas entering the labyrinth seal can only flow into a third radial throttling hole, a third sealing ring is arranged between the outer periphery of the third radial throttling hole and the inner gland, and a first sealing ring is arranged between the static ring and the inner gland; and one end of the labyrinth seal, which is close to the outer gland, is provided with a regulating mechanism spring, and the labyrinth seal is enabled to axially slide along the peripheral surface of the static ring according to the pressure in the static pressure gas cavity, so that the static pressure regulation of the gas passing through the third radial gas inlet hole is realized.
Description
(1) technical field
The present invention relates to the design of sound die mould dry gas sealing structure and application field, 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 especially suitable for 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 with aneroid, low leakage, environmental protection, energy-conservation, the spy of long-life
Point, researcher attempt to use dry gas seals in more rotary machine dynamic sealings.But found by practice and theory analysis,
The stability of dry gas seals largely depends not only upon the rotor dynamic balancing performance of unit, and depends on dry gas seals
The minimum speed of rotating ring.To find out its cause, being because dry gas seals require the contactless operating of small―gap suture, and to be formed required small
Gap, must be requested that sufficiently high rotating speed is had by sealing unit, otherwise, sealing property will decline, or even can not normal work.
To solve problems, domestic and foreign scholars propose pure hydrostatic profile and hybrid type Sealing Technology, it is ensured that dry gas seals are low
It can still realize that end face is opened under speed conditions, avoid end wear.
The formation of sound die mould Dry Gas Seal air film by dynamic pressure caused by the dynamic pressure groove of end face with stably, mainly being opened
Power and extraneous supply are realized into the static pressure opening force of end face balancing slit offer, 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 for handling variable working condition is often adjusted
The extraneous supply gas pressure of end face, the regulation of exactly this ambient pressure make static pressure mutation be present, and this is to sound die mould
The adaptability and stability of dry gas seals propose higher requirement, and technology can not meet this requirement at present.
(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
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 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 abut 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 set
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, and one end and the labyrinth seal 20 in the 3rd radial air inlet hole 18 connect
It is logical, and the broach region of labyrinth seal is always positioned at, the other end in the 3rd radial air inlet hole 18 connects the side of axial throttle orifice 16
Face；One end of axial 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 with
Pressurized air chamber connects, and the other end connection supply source of the gas in the first radial air inlet hole 2, the second radial air inlet hole 21 is arranged on labyrinth
The inside of sealing 20, the outer circumference surface of the other end connection stationary ring 9 in the second radial air inlet hole 21；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
Both ends respectively set the second sealing ring 19, and the gas into labyrinth seal 20 can only flow into the 3rd radial direction throttle orifice 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 close to external seal gland one end, different according to pressurized air cavity pressure promote labyrinth seal 20
Produce and slide axially along the outer circumference surface of stationary ring 9, 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 broach and broach of labyrinth seal 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, pass through 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 pass through 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 broach, bear larger flowing
Resistance, therefore the gas pressure for 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 and increased suddenly, therefore will not by the gas pressure of axial throttle orifice 16 into seal face balancing slit
Generation drastically raises, but a kind of metastable static pressure of mitigation acts on end face；If conversely, pass through the first radial direction stomata 2
The pressure for flowing into pressurized air chamber declines, and modulated mechanism spring-force driven dual labyrinth seal will break away to sealing medium side or high pressure
It is dynamic, it will not be produced by the gas pressure of axial throttle orifice 16 into seal face balancing slit and drastically declined, thus achieved
To extraneous supply gas pressure or the online real-time monitoring and buffered of envelope atmospheric pressure mutation, it is ensured that sound die mould dry gas seals
Long time stability is run.
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
Seal the mutation to extraneous supply gas pressure and enter row buffering regulation processing.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, static pressure opening force is formed in end face；During this period, extraneous institute's supplied gas is sealed to flow through
The sealing number of teeth can be realized by changing the axial displacement of labyrinth seal.Labyrinth seal axial direction both ends are supplied by the external world respectively
The effect of pressure and spring force, if extraneous supply gas pressure is uprushed, the axial thrust for making it act in labyrinth seal is more than design
Spring force, then labyrinth seal will overcome first, second sealing ring drag to be moved to low-pressure side or atmospheric side, compression spring, gas
The sealing number of teeth that body flows through increases, throttle effect enhancing, 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；On the contrary, if gas pressure diminishes suddenly, cause to act on the axial thrust in labyrinth seal and be less than design bullet
Spring force, then labyrinth seal will overcome first, second sealing ring drag to be moved to pressurized air intracavitary side or high-pressure side, now,
The sealing number of teeth that gas flows 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 will be pressurized in increasing a little, thus to high-pressure side moving influence pressurized air intracavity gas by labyrinth seal
It can avoid the gas pressure for reaching stationary ring air admission hole is too small from causing static pressure opening force insufficient, the problems such as seal face contact wear
Produce.Therefore, this pressurized air labyrinth throttling regulating and controlling mechanism is mutated online real-time to extraneous supply gas pressure or envelope atmospheric pressure
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, which is compared, has remarkable advantage.
(4) illustrate
Fig. 1 is the dynamic and static pressure dry gas sealing device schematic diagram that the present invention carries 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) embodiment
Technical scheme is described in detail below in conjunction with the accompanying drawings.
Referring to 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 abut 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 set
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, and one end and the labyrinth seal 20 in the 3rd radial air inlet hole 18 connect
It is logical, and the broach region of labyrinth seal is always positioned at, the other end in the 3rd radial air inlet hole 18 connects the side of axial throttle orifice 16
Face；One end of axial 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 with
Pressurized air chamber connects, and the other end connection air in the first radial air inlet hole 2, the second radial air inlet hole 21 is arranged on labyrinth seal
20 inside, the outer circumference surface of the other end connection stationary ring 9 in the second radial air inlet hole 21；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 both ends of the inner circumferential of labyrinth seal 20
Each to set the second sealing ring 19, the gas into 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, 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 seals 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, regulation
The gas-static in the 3rd radial air inlet hole 18, regulate and control 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, sealing operation unstability caused by extraneous air supply pressure fluctuation is avoided, is had more compared with traditional sound die mould dry gas seals
Good antijamming capability.
Further, the axial spacing span between the broach and broach of labyrinth seal 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 to the way of realization of 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)
- The regulating and controlling mechanism 1. a kind of pressurized air labyrinth for sound die mould dry gas seals throttles, the right side of internal gland (1) abuts Outer press cover (4), the left side of internal gland (1) abut 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 broach 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) Connected with the second radial air inlet hole (21) with pressurized air chamber, 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), prevents pressurized air Gas leaks into atmospheric side in chamber, and the both ends of the inner circumferential of labyrinth seal (20) respectively set 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 the first sealing ring is set between stationary ring (9) and internal gland (1) (17), gas leaks into the annular seal space of dry gas seals in prevention pressurized air chamber；Labyrinth seal is close to outer press cover one end equipped with tune Mechanism spring (7) is controlled, different according to pressurized air cavity pressure promote labyrinth seal (20) to be produced 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), the 3rd radial direction of regulation is entered The gas-static of stomata (18), regulate and control the air pressure of seal face.
- 2. the pressurized air labyrinth throttling regulating and controlling mechanism for sound die mould dry gas seals as claimed in claim 1, its feature It is：Axial spacing span between the broach and broach 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 |
|---|---|---|---|
| CN201610687480.2A CN106352094B (en) | 2016-08-18 | 2016-08-18 | Static pressure gas labyrinth throttling regulation and control mechanism for dynamic and static pressure type dry gas seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610687480.2A CN106352094B (en) | 2016-08-18 | 2016-08-18 | Static pressure gas labyrinth throttling regulation and control mechanism for dynamic and static pressure type dry gas seal |
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| Publication Number | Publication Date |
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| CN106352094A CN106352094A (en) | 2017-01-25 |
| CN106352094B true CN106352094B (en) | 2017-12-29 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949190B (en) * | 2017-05-27 | 2023-03-31 | 中国工程物理研究院总体工程研究所 | Floating ring type damping sealing device |
| 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 |
| 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 |
| CN114135673B (en) * | 2021-09-29 | 2024-07-19 | 浙江工业大学 | Vacuum suction type dry gas sealing structure based on Bernoulli principle |
| CN115306902A (en) * | 2022-08-09 | 2022-11-08 | 昆明理工大学 | Static pressure dry gas sealing device based on slit throttling principle |
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| CN101713461A (en) * | 2009-12-22 | 2010-05-26 | 中国船舶重工集团公司第七一一研究所 | Dry gas sealing device for technical screw compressor and application system thereof |
| CN102128272A (en) * | 2011-02-25 | 2011-07-20 | 西华大学 | Controllable mechanical sealing device |
| CN102959287A (en) * | 2011-10-27 | 2013-03-06 | 三菱重工业株式会社 | Dry gas sealing structure |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04258576A (en) * | 1991-02-08 | 1992-09-14 | Toshiba Corp | Shaft seal device |
| US9004491B2 (en) * | 2002-06-21 | 2015-04-14 | Inpro/Seal Llc | Shaft seal assembly |
| BRPI0803690B1 (en) * | 2008-08-29 | 2020-09-08 | Petróleo Brasileiro S/A - Petrobras | COMPACT RESTRICTIVE SEAL FOR BEARING CASE |
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2016
- 2016-08-18 CN CN201610687480.2A patent/CN106352094B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713461A (en) * | 2009-12-22 | 2010-05-26 | 中国船舶重工集团公司第七一一研究所 | Dry gas sealing device for technical screw compressor and application system thereof |
| CN102128272A (en) * | 2011-02-25 | 2011-07-20 | 西华大学 | Controllable mechanical sealing device |
| CN102959287A (en) * | 2011-10-27 | 2013-03-06 | 三菱重工业株式会社 | Dry gas sealing structure |
| 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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