CN109764134A - It is a kind of with stablize air film connection annular groove dry-gas sealed friction pair rotating ring - Google Patents
It is a kind of with stablize air film connection annular groove dry-gas sealed friction pair rotating ring Download PDFInfo
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- CN109764134A CN109764134A CN201910168421.8A CN201910168421A CN109764134A CN 109764134 A CN109764134 A CN 109764134A CN 201910168421 A CN201910168421 A CN 201910168421A CN 109764134 A CN109764134 A CN 109764134A
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- Prior art keywords
- annular groove
- rotating ring
- dynamic pressure
- dry
- groove
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 239000007789 gas Substances 0.000 description 43
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 14
- 239000003345 natural gas Substances 0.000 description 7
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 206010020852 Hypertonia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007657 chevron notch test Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- Mechanical Sealing (AREA)
Abstract
The invention discloses a kind of with the dry-gas sealed friction pair rotating ring for stablizing air film connection annular groove, including the connection annular groove being arranged on dry gas seals rotating ring ontology, dam is formed between connection annular groove and the inside of dry gas seals rotating ring ontology, it is centrosymmetric on dry gas seals rotating ring ontology and is provided with several dynamic pressure grooves, and the slot root of each dynamic pressure groove be connected to annular groove connection, the outer end of dynamic pressure groove is opened on the outer of dry gas seals rotating ring ontology, two adjacent dynamic pressure grooves form platform with being connected between annular groove, the side of platform is sealing weir, one side of sealing weir is connect with the upper surface of platform, another side and the bottom surface of dynamic pressure groove connect.The configuration of the present invention is simple, is able to achieve that the pressure on dry-gas sealed friction pair rotating ring in each dynamic pressure groove is substantially uniform, ensure that rotating ring and its dry gas seals traveling comfort.
Description
Technical field
The present invention relates to a kind of sealing devices, and in particular to a kind of with the dry gas seals friction for stablizing air film connection annular groove
Secondary rotating ring.
Background technique
Rotating ring is a part secondary for the friction of dry gas seals equipment, using the most on natural gas centrifugal formula compressor
Extensively.According to working condition, running parameter and requirement, slot can be designed to different planar graph and section flute profile.It is flat
Face figure has chevron-notch, the Eight Character trough, helicla flute, arc groove and straight-line groove etc.；Section flute profile have dovetail groove, square groove, V-shaped groove and
Wedged bottom slot etc..But they are owned by a common ground, and it is mutually indepedent that be exactly between slot and slot be, be not attached to together, due to
Mismachining tolerance or operating reason, therefore it be easy to cause the dynamic pressure in each dynamic pressure groove uneven, thus make the pressure imbalance between slot,
Cause the gas film stiffness between dynamic and static ring unstable, the leakage of sealing gas occurs.Further, since compressor vibrates at work
Etc. reasons, easily cause the unstable of air film, and then make in each slot pressure uneven, reduce gas film stiffness, easily cause dynamic and static ring
It collides, dry gas seals is caused to fail.
Summary of the invention
To overcome the problems, such as that existing dry gas seals rotating ring exists, the present invention provides a kind of with stablizing air film connection annular groove
Dry-gas sealed friction pair rotating ring, the configuration of the present invention is simple are able to achieve the pressure on dry-gas sealed friction pair rotating ring in each dynamic pressure groove
It is substantially uniform, ensure that rotating ring and its dry gas seals traveling comfort.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
It is a kind of with stablize air film connection annular groove dry-gas sealed friction pair rotating ring, including be arranged in dry gas seals rotating ring sheet
Connection annular groove on body forms dam, dry gas seals rotating ring sheet between connection annular groove and the inside of dry gas seals rotating ring ontology
Be centrosymmetric on body and be provided with several dynamic pressure grooves, and the slot root of each dynamic pressure groove be connected to annular groove connection, dynamic pressure groove it is outer
End is opened on the outer of dry gas seals rotating ring ontology, and two adjacent dynamic pressure grooves form platform with being connected between annular groove, the side of platform
For sealing weir, one side of sealing weir is connect with the upper surface of platform, the bottom surface connection of another side and dynamic pressure groove.
Further, the depth for being connected to annular groove is identical as the depth of dynamic pressure groove.
Further, the depth of the depth and dynamic pressure groove that are connected to annular groove is 2.5~10 μm.
Further, the outer end width of dynamic pressure groove is greater than slot root width.
Further, the cross sectional shape for being connected to annular groove is rectangle, U-shaped, triangle or semicircle.
Further, the width for being connected to annular groove is 2.5~8000 μm.
Compared with prior art, the invention has the following beneficial technical effects:
The present invention it is a kind of with stablize air film connection annular groove dry-gas sealed friction pair rotating ring, including dynamic pressure groove, platform, dam,
Sealing weir be connected to annular groove；At work, rotating ring rotation will tangentially be sucked in dynamic pressure groove dry gas sealing device by sealing gas, gas
Body, to slot root motion, enters connection annular groove with annular groove junction is connected to by dynamic pressure groove along dynamic pressure groove.Due to by dam and close
The obstruction on weir is sealed, gas does deceleration and flows and gradually reduce, and pressure gradually rises.Since each dynamic pressure groove is connected by connection annular groove
Be connected together so that gas can enter in connection annular groove in dynamic pressure groove, so when entire rotating ring on pressure in dynamic pressure groove be all
The same, there is no the hypertonia in a certain dynamic pressure groove, the pressure avoided in each dynamic pressure groove is unbalanced；It efficiently solves
Natural gas centrifugal formula compressor dry gas seals rotating rings at runtime unstable, and it is dry to improve natural gas centrifugal formula compressor
The gentle membrane stability of safety of hermetic seal operation, it is the configuration of the present invention is simple, easy for installation, greatly reduce natural gas centrifugal formula
The failure rate of compressor operation.
Further, the depth for being connected to annular groove is identical as the depth of dynamic pressure groove, and gas can preferably be made to enter from dynamic pressure groove
It is connected to annular groove, and the resistance that gas enters is reduced by the design of size.
Further, the shape for being connected to annular groove can be made various shape, can better meet sealing device operating condition.
Detailed description of the invention
Fig. 1 is front view of the invention；
Fig. 2 is sectional view of the invention；
Fig. 3 is 3 dimensional drawing of the invention.
Wherein: 1, dynamic pressure groove；2, platform；3, dam；4, sealing weir；5, it is connected to annular groove；Ro is the outer of dry gas seals rotating ring ontology
Diameter；Ri is the internal diameter of dry gas seals rotating ring ontology.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawing:
It is a kind of with the dry-gas sealed friction pair rotating ring for stablizing air film connection annular groove referring to Fig. 1 to Fig. 3, in common dry gas
Connection annular groove is increased on moving sealing ring ontology: including dynamic pressure groove 1, platform 2, dam 3, sealing weir 4, connection annular groove 5；
The slot root of dynamic pressure groove 1 is connected to annular groove 5 is connected to, and the outer end of dynamic pressure groove 1 is opened on the outer of rotating ring, as being sealed
The suction inlet A of gas.The other end B of dynamic pressure groove 1 is connect with connection annular groove 5, and connection annular groove 5 is connected to all dynamic pressure grooves 1
Together, the cross sectional shape for being connected to annular groove 5 has rectangle, U-shaped, triangle and semicircle, is connected to 2.5~8000 μm of width of annular groove 5,
By sealing gas from A mouthfuls of sucking dynamic pressure grooves 1, dynamic pressure is formed, is connected at B mouthfuls with annular groove 5 is connected to.
Dynamic pressure groove 1 with to be connected to annular groove 5 all be a series of grooves processed on rotating ring surface, be connected to the depth of annular groove 5 with
The depth of dynamic pressure groove 1 is identical, and depth is generally 2.5~10 μm；And platform 2, dam 3 and sealing weir 4 are processed on rotating ring surface
A series of remainder after grooves out.Sealing weir 4 is the side of platform 2, is connect on one side with the upper surface of platform 2, one side and dynamic pressure
The bottom surface of slot 1 connects.
Gas enters connection annular groove 5 by 1 import of dynamic pressure groove in the secondary operation of friction, with slot cross-section shape in dynamic pressure groove 1
The variation gas of shape is compressed, and is formed partial high pressure area with being connected in annular groove 5 in dynamic pressure groove 1, and is formed certain thickness stabilization
Air film, the closing force that the opening force formed by air film active force and spring force and medium active force are formed reaches balance, realization
Non-contact seals, due to being connected to the presence of annular groove 5, high nip pressures are more uniform, and air film is stablized.Present invention efficiently solves
The air film of natural gas centrifugal formula compressor dry-gas sealed friction pair at runtime is unstable, and improves the compression of natural gas centrifugal formula
The safety of machine dry gas seals operation, stability.This structure is simple, easy for installation, greatly reduces the compression of natural gas centrifugal formula
The failure of machine operation.
The present invention is described in further details With reference to embodiment:
As shown in Fig. 1, it is a kind of with stablize air film connection annular groove dry-gas sealed friction pair rotating ring mainly include dynamic pressure
Slot 1, platform 2, dam 3, sealing weir 4, connection annular groove 5.
The root of dynamic pressure groove 1 is connected with connection annular groove 5, and the outer of rotating ring is equipped with gas feed A, connection annular groove and dynamic pressure
The root B that slot 1 connects makes gas enter connection annular groove 5 from dynamic pressure groove 1.A certain number of dynamic pressure grooves 1 are machined on sealing surface,
And as the depth of connection annular groove 5, depth is generally 2.5~10 μm, and each dynamic pressure groove 1 is connected with connection annular groove 5
It connects.
Rotating ring rotation will tangentially be sucked in dynamic pressure groove 1 by sealing gas when work, and radial component is by outer diameter towards center (low pressure
Side) flowing, limit gas flow low-pressure side.Gas, to slot root motion, is connected by dynamic pressure groove 1 with annular groove 5 is connected to along dynamic pressure groove 1
It meets place and enters connection annular groove 5.Due to the obstruction by dam 3 and sealing weir 4, gas does deceleration and flows and gradually compressed, in slot
Root forms partial high pressure area, so that end face is separated several microns (3-5um) and is formed certain thickness air film, in this air-film thickness
Under, the opening force that is formed by air film active force with balance is reached by the closing force that spring force and medium active force are formed, it is then close
Envelope realizes non-contact operating.Since each dynamic pressure groove 1 is linked together by connection annular groove 5, so when entire rotating ring on dynamic pressure
Pressure in slot 1 is the same, to ensure that the reliability and stability of dry gas seals.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
A specific embodiment of the invention is only limitted to this, for those of ordinary skill in the art to which the present invention belongs, is not taking off
Under the premise of from present inventive concept, several simple deduction or replace can also be made, all shall be regarded as belonging to guarantor of the invention
Protect range.
Claims (6)
1. a kind of with the dry-gas sealed friction pair rotating ring for stablizing air film connection annular groove, which is characterized in that including being arranged in dry gas
Connection annular groove (5) on moving sealing ring ontology forms dam between connection annular groove (5) and the inside of dry gas seals rotating ring ontology
(3), be centrosymmetric and be provided with several dynamic pressure grooves (1) on dry gas seals rotating ring ontology, and the slot root of each dynamic pressure groove (1) with
It is connected to annular groove (5) connection, the outer end of dynamic pressure groove (1) is opened on the outer of dry gas seals rotating ring ontology, two adjacent dynamic pressure grooves
(1) platform (2) are formed with being connected between annular groove (5), the side of platform (2) is sealing weir (4), one side and the platform (2) of sealing weir (4)
Upper surface connection, another side is connect with the bottom surface of dynamic pressure groove (1).
2. according to claim 1 a kind of with the dry-gas sealed friction pair rotating ring for stablizing air film connection annular groove, feature
It is, the depth for being connected to annular groove (5) is identical as the depth of dynamic pressure groove (1).
3. according to claim 2 a kind of with the dry-gas sealed friction pair rotating ring for stablizing air film connection annular groove, feature
It is, the depth of the depth and dynamic pressure groove (1) that are connected to annular groove (5) is 2.5~10 μm.
4. according to claim 1 a kind of with the dry-gas sealed friction pair rotating ring for stablizing air film connection annular groove, feature
It is, the outer end width of dynamic pressure groove (1) is greater than slot root width.
5. according to claim 1 a kind of with the dry-gas sealed friction pair rotating ring for stablizing air film connection annular groove, feature
It is, the cross sectional shape of connection annular groove (5) is rectangle, U-shaped, triangle or semicircle.
6. according to claim 1 a kind of with the dry-gas sealed friction pair rotating ring for stablizing air film connection annular groove, feature
It is, the width of connection annular groove (5) is 2.5~8000 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910168421.8A CN109764134A (en) | 2019-03-06 | 2019-03-06 | It is a kind of with stablize air film connection annular groove dry-gas sealed friction pair rotating ring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910168421.8A CN109764134A (en) | 2019-03-06 | 2019-03-06 | It is a kind of with stablize air film connection annular groove dry-gas sealed friction pair rotating ring |
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| Publication Number | Publication Date |
|---|---|
| CN109764134A true CN109764134A (en) | 2019-05-17 |
Family
ID=66456691
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910168421.8A Pending CN109764134A (en) | 2019-03-06 | 2019-03-06 | It is a kind of with stablize air film connection annular groove dry-gas sealed friction pair rotating ring |
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| CN (1) | CN109764134A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110822084A (en) * | 2019-11-19 | 2020-02-21 | 潍柴动力股份有限公司 | Sealing member and engine |
| CN115875457A (en) * | 2022-12-01 | 2023-03-31 | 浙江工业大学 | Natural gas dry gas sealing ring structure with lyophobic function surface |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1753128A1 (en) * | 1991-01-24 | 1992-08-07 | Сумское Машиностроительное Научно-Производственное Объединение Им.М.В.Фрунзе | Gas static-and-dynamic seal |
| CN201306445Y (en) * | 2008-10-16 | 2009-09-09 | 东营海森密封技术有限责任公司 | Liquid film lubrication double end surface non-contact mechanical seal device |
| CN201582390U (en) * | 2009-09-08 | 2010-09-15 | 江苏大学 | Novel mechanical sealing ring with circumferential through groove added at inner-diameter end of radial spiral groove |
| CN201896950U (en) * | 2011-01-24 | 2011-07-13 | 大连华阳光大密封有限公司 | Dry gas sealing pairing ring |
| CN209587136U (en) * | 2019-03-06 | 2019-11-05 | 西安石油大学 | It is a kind of with stablize air film connection annular groove dry-gas sealed friction pair rotating ring |
-
2019
- 2019-03-06 CN CN201910168421.8A patent/CN109764134A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1753128A1 (en) * | 1991-01-24 | 1992-08-07 | Сумское Машиностроительное Научно-Производственное Объединение Им.М.В.Фрунзе | Gas static-and-dynamic seal |
| CN201306445Y (en) * | 2008-10-16 | 2009-09-09 | 东营海森密封技术有限责任公司 | Liquid film lubrication double end surface non-contact mechanical seal device |
| CN201582390U (en) * | 2009-09-08 | 2010-09-15 | 江苏大学 | Novel mechanical sealing ring with circumferential through groove added at inner-diameter end of radial spiral groove |
| CN201896950U (en) * | 2011-01-24 | 2011-07-13 | 大连华阳光大密封有限公司 | Dry gas sealing pairing ring |
| CN209587136U (en) * | 2019-03-06 | 2019-11-05 | 西安石油大学 | It is a kind of with stablize air film connection annular groove dry-gas sealed friction pair rotating ring |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110822084A (en) * | 2019-11-19 | 2020-02-21 | 潍柴动力股份有限公司 | Sealing member and engine |
| CN110822084B (en) * | 2019-11-19 | 2021-12-21 | 潍柴动力股份有限公司 | Sealing member and engine |
| CN115875457A (en) * | 2022-12-01 | 2023-03-31 | 浙江工业大学 | Natural gas dry gas sealing ring structure with lyophobic function surface |
| CN115875457B (en) * | 2022-12-01 | 2023-08-08 | 浙江工业大学 | Natural gas dry gas sealing ring structure with lyophobic functional surface |
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