CN206280505U - For the built-in sealing medium throttling regulation device of sound die mould dry gas seals - Google Patents
For the built-in sealing medium throttling regulation device of sound die mould dry gas seals Download PDFInfo
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- CN206280505U CN206280505U CN201620902839.9U CN201620902839U CN206280505U CN 206280505 U CN206280505 U CN 206280505U CN 201620902839 U CN201620902839 U CN 201620902839U CN 206280505 U CN206280505 U CN 206280505U
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- valve element
- sealing
- annular boss
- dry gas
- envelope
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- 238000007789 sealing Methods 0.000 title claims abstract description 61
- 230000033228 biological regulation Effects 0.000 title claims abstract description 20
- 210000004907 gland Anatomy 0.000 claims abstract description 8
- 239000007937 lozenge Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 230000003068 static effect Effects 0.000 description 17
- 238000005516 engineering process Methods 0.000 description 5
- 230000002706 hydrostatic effect Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- GICIECWTEWJCRE-UHFFFAOYSA-N 3,4,4,7-tetramethyl-2,3-dihydro-1h-naphthalene Chemical compound CC1=CC=C2C(C)(C)C(C)CCC2=C1 GICIECWTEWJCRE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012916 structural analysis Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Sealing Devices (AREA)
Abstract
For the built-in sealing medium throttling regulation device of sound die mould dry gas seals, in sealing gland, first annular boss and the second annular boss are machined with axial step through hole, the first envelope air cavity is formed between two boss, the second envelope air cavity is formed between flange and the second annular boss；There is the first stomata between first envelope air cavity and annular seal space, connected by the second stomata between the second envelope air cavity and stationary ring back of the body chamber, envelope gas enters seal face balancing slit via stationary ring back of the body chamber by stationary ring throttle orifice.Valve element is provided near one end of pad installs spring in axial blind hole, blind hole, spring is located between valve element and pad；The valve element other end and the second annular boss form restriction, and lozenges end is provided with push rod, and the push rod other end is arranged on flange and concentric with axial step through hole by nut support, nut.Change the axial location of valve element by adjusting nut, and then change the aperture of restriction, realize the regulation and control of gas pressure and flow in Dry Gas Seal balancing slit.
Description
(1) technical field
The utility model is related to Hydrodynamic-hydrostatic pressure combined dry gas sealing structure design field, and in particular to one kind is with built-in close
The Hydrodynamic-hydrostatic pressure combined dry gas sealing structure of envelope medium throttling regulation device, is particularly well-suited to low speed or in variable working condition condition
The axle end sealing device of slewing.
(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 use dry gas seals in more rotary machine dynamic sealings.But found by practice and theory analysis,
The stability of dry gas seals is largely dependent upon the rotating speed of unit, because dry gas seals requirement small―gap suture noncontact
Formula is operated, and to form required small―gap suture, must be requested that have sufficiently high rotating speed by sealing unit, otherwise, sealing property
To decline, or even cannot normal work.Because the speed of mainshaft of centrifugal compressor is (10000r/min or so) typically all higher,
This guarantees the requirement that dry gas seals realize small―gap suture noncontact operating, so dry gas seals use acquisition in such unit
Huge success.But most of slewings have the variable working condition such as frequent start-stop, rotation speed change, pressure change, this will influence
The sealing property of dry gas seals, for example：The phenomenons such as seal face abrasion, sealing ring fragmentation occur.It is low for such as reactor etc.
Rotating speed machine, too low rotating speed is difficult to form enough air film opening force and rigidity, it is impossible to ensure the normal operation of sealing.
Regarding to the issue above, Many researchers propose dry gas seals static pressure opening technology, and this structure is usually in dry gas
Axial baroport is driven on stationary seal ring, the sealing medium of certain pressure is passed to, static pressure opening force is formed in seal face, so that
Dry gas seals still have good sealing in the case where equipment rotating speed is very low.External such as Chesterton companies are very early to low
The axle envelope of fast slewing such as stirred tank uses static pressure dry gas sealing structure (United States Patent (USP) US5052694 " Hydrostatic
Face seal and bearing "), also " the Contact free gas seal rings of German patent DE 2444544
with gas barrier-have curved radial grooves to produce aerostatic axial
Force ", United States Patent (USP) US5755817 " Hydrostatic seal ", US8206083B2 " Carbon hydrostatic
Face seal " and Japan Patent JP2002333022 " hydrostatic gas bearing " have open report, Japanese skin
The gas-static type dry gas seals (http for drawing sealing Co., Ltd to develop://www.pillar.co.jp/pillar_eng/
Contents/product/44/product.html) and Britain's Irene Eijs fluid sound die mould compressor dry gas seals
(http://www.aesseal.com/), China takes in terms of performance study and the structural analysis of static pressure dry gas seals in recent years
Necessarily achieve, such as Liu Fei (" research of static pressure dry gas seals ", 2010), Liu Ting (" brief talking the development of static pressure dry gas seals ",
2011), Li Leilei (" chemical industry high-tension apparatus static pressure dry gas seals characteristic research ", 2011), Li Shuanxi (" active and static pressure mixed type gas
The specificity analysis of body sealing ", 2012), Wang Yongbao (" static pressure type dry gas seals production domesticization research with application ", 2016) etc. is also to machine
Tool sealing static pressure opening technology carried out different degrees of research, to stationary seal ring throttling hole site, stationary ring end face it is equal
Indent depth etc. is optimized design.But for the pressure for how controlling sealing medium, leakage rate is reduced, improve dry gas close
Seal structure is to rotating speed, the adaptability of pressure change, however it remains many key issues need to solve.Additionally, at present both at home and abroad
Used dynamic and static pressure mechanical seal structure, is typically necessary extra buffer medium, this not only adds the complexity of sealing structure,
The cost of whole sealing device is also improved, and sealed medium pressure is influenceed by more external factors.
Using dry gas seals static pressure opening technology, a set of built-in sealing medium throttling regulation device can be designed, be not required to
In the case of being additionally provided buffer medium, the sealing medium of stabilization is both can guarantee that, and does not increase the complexity of sealing structure,
Sealed medium pressure can be adjusted according to the change of operating mode, and the low speed such as the high-speed rotating equipments such as compressor and stirred tank are set
There is wide applicability.
(3) content of the invention
The utility model will overcome the disadvantages mentioned above of prior art, a kind of built-in sealing for sound die mould dry gas seals
Medium throttling regulation device, built-in sealing medium throttling regulation device can realize the control to dry gas seals static pressure opening force
And with the ability of adaptation variable working condition particularly friction speed and pressure.
The utility model is to be achieved through the following technical solutions：
A kind of built-in sealing medium throttling regulation device for sound die mould dry gas seals, installed in sealing gland 27
It is interior, it is made up of axial step through hole 25, pad 2, spring 5, valve element 6, push rod 11, nut 13, flange 9.Axial step through hole 25
In be machined with the annular boss 8 of first annular boss 3 and second, form the first envelope air cavity between two boss, flange 9 is arranged on pressure
The atmospheric side of lid 27 and concentric with axial step through hole 25, the second envelope air cavity is formed between the annular boss 8 of flange 9 and second；The
Connected by the first stomata 24 between one envelope air cavity and annular seal space 20, the second gas is passed through between the second envelope air cavity and stationary ring back of the body chamber 15
Hole 14 connects, and envelope gas enters seal face balancing slit 22 via stationary ring back of the body chamber by some stationary ring throttle orifices 19.Valve element 6 is near pad
One end of piece 2 is provided with and spring 5 is installed in axial blind hole, blind hole, and spring 5 is located between valve element 6 and pad 2, valve element outer circumference surface
Coordinating with the first sealing ring 4 set on first annular boss inner periphery ensures that envelope gas cannot be introduced into valve core spring side；Valve element is another
One end processes wedgewise, and lozenges and the second annular boss 8 form restriction, and lozenges end is provided with push rod 11, push rod 11
Coordinate with the second sealing ring 10 set in flange 9 to prevent envelope gas from leaking out, the push rod other end is supported by nut 13, nut 13
It is on flange 9 and concentric with axial step through hole 25.By the adjusting spool 6 of adjusting nut 13 in axial location, Jin Ergai
The aperture of traitorous head piece, realizes the regulation and control of gas pressure and flow in Dry Gas Seal balancing slit.
Further, sealing medium is divided into two-way by the built-in sealing medium throttling regulation device, all the way through the first gas
Hole 24 flows to annular seal space 20, and the second stomata of another road 14 flows to stationary seal ring back of the body chamber 15.
Further, balancing slit 22 is machined with the end face of the stationary ring 18, or the end face of the rotating ring 23 is machined with balancing slit 22,
Or it is machined with balancing slit 22 on the seal face of the stationary ring 18 and rotating ring 23.
Further, the wedge structure of described valve element one end can be taper surface, spherical, parabola.
Radial direction alleged by the utility model refers to the radial direction of stationary ring or rotating ring, and the axial direction alleged by the utility model refers to stationary ring
Or rotary shaft or the direction parallel to the rotary shaft of rotating ring.
The utility model has the advantages that：
The dynamic and static pressure mechanically-sealing apparatus with built-in sealing medium throttling regulation device that the utility model is provided, use
Built-in sealing medium throttling regulation device, by sealing medium is divided into the medium that two-way has different pressures.Lead up to gland
Inner via hole flows to annular seal space, is sealing medium, leads up to gland inner via hole and flows to stationary ring back of the body chamber, is flowed to by stationary ring throttle orifice
Seal face, is buffer medium, forms static pressure opening force.Static pressure opening force can be adjusted by the push rod of throttling arrangement,
The axial displacement of push rod changes the throttleng surface of restriction, and then changes the pressure difference of two-way medium, and then adapts to pressure, the fluctuation of speed
Deng variable working condition.Push rod position is constant, then two-way sealing medium pressure difference is constant, so both can guarantee that the sealing of steady pressure was situated between
Matter, need not increase buffer medium device again, reduce the complexity of sealing structure, and sealed medium pressure can be according to operating mode
Change is adjusted, and has wide applicability to rotating machines such as roturbo, stirred tank and compressors.
(4) illustrate
Fig. 1 is that the overall structure of the dynamic and static pressure mechanical seal of the built-in sealing medium throttling regulation device of the utility model band is shown
It is intended to.
Fig. 2 is the structural representation of the utility model stationary seal ring end face.
Fig. 3 is the structural representation of the utility model moving sealing ring end face.
Wherein：
1-housing；2-pad；3-first annular boss；4-the first sealing ring；5-spring；6-valve element；7-enter
Stomata；8-the second annular boss；9-flange；10-the second sealing ring；11-push rod；12-flange screwed hole；13-nut；
14-the second stomata；15-stationary ring carries on the back chamber；16-mark closely screw；17-throw-out collar；18-stationary ring；Throttle orifice in 19-stationary ring；
20-annular seal space；21-axle sleeve；22-end face balancing slit；23-rotating ring；24-the first stomata；Axial step is led in 25-gland
Hole；26-dry gas seals spring；27-gland.
(5) specific embodiment
The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings.
Referring to figs. 1 to Fig. 3, the utility model is used for the built-in sealing medium throttling regulation and control dress of sound die mould dry gas seals
Put, in sealing gland 27, by axial step through hole 25, pad 2, spring 5, valve element 6, push rod 11, nut 13, flange 9
Composition.The annular boss 8 of first annular boss 3 and second is machined with axial step through hole 25, first is formed between two boss
Envelope air cavity, flange 9 is arranged on the atmospheric side of gland 27 and concentric with axial step through hole 25, the annular boss 8 of flange 9 and second it
Between form the second envelope air cavity；Connected by the first stomata 24 between first envelope air cavity and annular seal space 20, the second envelope air cavity and stationary ring
The back of the body is connected between chamber 15 by the second stomata 14, and envelope gas enters seal face via stationary ring back of the body chamber by some stationary ring throttle orifices 19
Balancing slit 22.Valve element 6 is provided near one end of pad 2 installs spring 5 in axial blind hole, blind hole, spring 5 is located at valve element 6 and pad
Between piece 2, valve element outer circumference surface coordinates with first sealing ring 4 of setting on first annular boss inner periphery ensures that envelope gas cannot enter
Enter valve core spring side；The valve element other end processes wedgewise, and lozenges and the second annular boss 8 form restriction, lozenges end
Push rod 11 is installed, push rod 11 coordinates with interior the second sealing ring 10 for setting of flange 9 to prevent envelope gas from leaking out, the push rod other end
Supported by nut 13, nut 13 is arranged on flange 9 and concentric with axial step through hole 25.Valve element is changed by adjusting nut 13
6 axial location, and then change the aperture of restriction, realize the tune of gas pressure and flow in Dry Gas Seal balancing slit
Control.
Sealing medium is divided into two-way by the built-in sealing medium throttling regulation device, is flowed to through the first stomata 24 all the way
Annular seal space 20, pressure slightly has reduction；The second stomata of another road 14 flows to stationary seal ring back of the body chamber 15, and pressure warp knuckle flows down drop.
Balancing slit 22 is machined with the end face of the stationary ring 18, or the end face of the rotating ring 23 is machined with balancing slit 22, or it is described
Balancing slit 22 is machined with the seal face of stationary ring 18 and rotating ring 23.Resulting effect is to make the dry gas sealing structure can be with
Quickly open under the low speed or during machine startup, adjusting push rod axial displacement by rotating nut can adjust that to flow to stationary ring close
The pressure of medium is sealed, variable speed operating mode is adapted to.
The wedge structure of described valve element one end can be taper surface, spherical, parabola.
Content described in this specification is only enumerating to the way of realization of utility model design, protection of the present utility model
Scope is not construed as being only limitted to stated concrete form, and protection domain of the present utility model also includes people in the art
Member according to the utility model design it is conceivable that equivalent technologies mean.
Claims (3)
1. the built-in sealing medium throttling regulation device of sound die mould dry gas seals is used for, in sealing gland (27), its
It is characterised by：By axial step through hole (25), pad (2), spring (5), valve element (6), push rod (11), nut (13), flange (9)
Composition；First annular boss (3) and the second annular boss (8), first annular boss are machined with the step through-hole (25) of axial direction
(3) form the first envelope air cavity and the second annular boss (8) between, flange (9) installed in gland (27) atmospheric side and with axial direction
Step through-hole (25) with one heart, forms the second envelope air cavity between flange (9) and the second annular boss (8)；First envelope air cavity and sealing
Connected by the first stomata (24) between chamber (20), between the second envelope air cavity and stationary ring back of the body chamber (15) by the second stomata (14) even
Logical, envelope gas enters seal face balancing slit (22) via stationary ring back of the body chamber by some stationary ring throttle orifices (19)；Valve element (6) is near pad
One end of piece (2) is provided with axial blind hole, and spring (5) is installed in blind hole, spring (5) between valve element (6) and pad (2), valve
Core outer circumference surface coordinates with first sealing ring (4) of setting on first annular boss inner periphery ensures that envelope gas cannot be introduced into valve element bullet
Spring side；The valve element other end processes wedgewise, and lozenges and the second annular boss (8) form restriction, and lozenges end is provided with
Push rod (11), push rod (11) the second sealing ring (10) for setting interior with flange (9) coordinates to prevent envelope gas from leaking out, and push rod is another
End is supported by nut (13), and nut (13) is on flange (9) and concentric with axial step through hole (25)；Adjusting nut 13 is adjusted
Section valve element 6 changes the aperture of restriction in axial location.
2. the built-in sealing medium throttling regulation device of sound die mould dry gas seals, its feature are used for as claimed in claim 1
It is：Sealing medium is divided into two-way by the built-in sealing medium throttling regulation device, is flowed to through the first stomata (24) all the way
Annular seal space (20), the stomata of another road second (14) flows to stationary seal ring back of the body chamber (15).
3. the built-in sealing medium throttling regulation device of sound die mould dry gas seals, its feature are used for as claimed in claim 2
It is：The wedge structure of described valve element one end is one of taper surface, spherical, parabola.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620902839.9U CN206280505U (en) | 2016-08-18 | 2016-08-18 | For the built-in sealing medium throttling regulation device of sound die mould dry gas seals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620902839.9U CN206280505U (en) | 2016-08-18 | 2016-08-18 | For the built-in sealing medium throttling regulation device of sound die mould dry gas seals |
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| Publication Number | Publication Date |
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| CN206280505U true CN206280505U (en) | 2017-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620902839.9U Withdrawn - After Issue CN206280505U (en) | 2016-08-18 | 2016-08-18 | For the built-in sealing medium throttling regulation device of sound die mould dry gas seals |
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| CN (1) | CN206280505U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122484A (en) * | 2016-08-18 | 2016-11-16 | 浙江工业大学 | Built-in sealing medium throttling regulation and control device for dynamic and static pressure type dry gas seal |
| CN109237044A (en) * | 2018-10-31 | 2019-01-18 | 东莞市华汇精密机械有限公司 | A kind of dry-type encapsulated device for twin-screw dry powder pump |
| CN112096878A (en) * | 2020-09-23 | 2020-12-18 | 青岛高测科技股份有限公司 | Direct injection type crystal silicon slicer main shaft non-contact sealing structure |
-
2016
- 2016-08-18 CN CN201620902839.9U patent/CN206280505U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122484A (en) * | 2016-08-18 | 2016-11-16 | 浙江工业大学 | Built-in sealing medium throttling regulation and control device for dynamic and static pressure type dry gas seal |
| CN109237044A (en) * | 2018-10-31 | 2019-01-18 | 东莞市华汇精密机械有限公司 | A kind of dry-type encapsulated device for twin-screw dry powder pump |
| CN112096878A (en) * | 2020-09-23 | 2020-12-18 | 青岛高测科技股份有限公司 | Direct injection type crystal silicon slicer main shaft non-contact sealing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170627 Effective date of abandoning: 20171205 |
|
| AV01 | Patent right actively abandoned |