CN203285989U - Radial shunting type groove end face mechanical sealing structure simulating bird wing groove - Google Patents
Radial shunting type groove end face mechanical sealing structure simulating bird wing groove Download PDFInfo
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- CN203285989U CN203285989U CN2013200865924U CN201320086592U CN203285989U CN 203285989 U CN203285989 U CN 203285989U CN 2013200865924 U CN2013200865924 U CN 2013200865924U CN 201320086592 U CN201320086592 U CN 201320086592U CN 203285989 U CN203285989 U CN 203285989U
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- groove
- splitter box
- sealing
- drainage trough
- face
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Abstract
A radial shunting type groove end face mechanical sealing structure simulating a bird wing groove comprises two mechanical sealing rings, namely a movable ring and a static ring. The end face of at least one of the mechanical sealing rings of the movable ring and the static ring is provided with a plurality of radial shunting type grooves which are distributed in the circumferential direction and simulate the bird wing groove. The radial shunting type grooves simulating the bird wing groove are located in the medium high-pressure side, namely the upstream. Each radial shunting type groove simulating the bird wing groove comprises a flow guide groove body and more than two shunting groove bodies similar to the structure of the bird wing groove. The shunting groove bodies are linked with the flow guide groove bodies and located on the lee sides of the flow guide groove bodies. The shunting groove bodies are distributed in the radial direction, and meanwhile extend in the circumferential direction. The non-grooved area between the radial shunting groove bodies simulating the bird wing groove is a sealing weir, and an annular band formed by the non-grooved area on the end face in the circumferential direction is a sealing dam. The sealing dam is located on the end face low-pressure side, namely the downstream.
Description
Technical field
The utility model relates to a kind of gas end surface mechanical sealing structure of rotary type fluid machine, is used for the running shaft gas seal of the rotating machineries such as various compressors, decompressor, pump, reactor.
Background technique
Dry gas seals is applied widely on various high-speed rotating machines with its unique superiority, as centrifugal compressor, decompressor, blower fan etc.Dry gas seals is by offer various fluid sound die mould grooves on seal face, when rotating ring rotates, utilize the active and static pressure effect of type groove that gas medium is pumped into seal face, therefore the flowing medium that enters end face produces certain opening force and pushes end face open in type groove root constricted flow, thereby realize the non-contact operation of dynamic and static ring, wherein present most popular face type groove is spiral chute.The report of spiral chute and derivative type groove gas face seals thereof has a lot, as Chinese patent 20154747236U, 20152390U and 96216242.6, and European patent EP 0470406A1, EP0564153A1 etc.But, it is not good that these Spiral Groove Dry Gas Seals by Uses still exist under low speed low pressure or low speed heavy pressure operating mode the start and stop characteristic, gas film stiffness is large not, the face opening ability can not adapt to the wider problems such as operating range, cause dry gas seals quick unlatching in use to occur being difficult to, low cruise stability is not good, and seal face easily produces the problem of dry grinding, is difficult to meet the service condition of mechanical seal under the contour Parameter Conditions of high pressure.
Summary of the invention
In order to overcome above shortcomings in the dry gas seals prior art, the utility model is used for reference the special role of low-speed operations high load birds assistant wing groove structure under regime of flight, provide a kind of strong in low speed low pressure or low speed heavy pressure operating mode lower end surface hydrostatic effects, gas film stiffness large and the start and stop characteristic radially bypass type groove end face seal structure of imitative pinion wing groove preferably.
The technical solution of the utility model is:
The radially bypass type groove end surface mechanical sealing structure of imitative pinion wing groove, comprise two mechanical seal rings, be rotating ring and stationary ring, it is characterized in that: in described rotating ring and stationary ring, the end face of at least one mechanical seal ring is provided with the radially bypass type groove of a plurality of circumferential imitative pinion wing grooves, the radially bypass type groove of described imitative pinion wing groove is positioned at medium high pressure side, i.e. upstream; The radially bypass type groove of described imitative pinion wing groove comprise a drainage trough and more than two like the splitter box of pinion wing groove structure, described splitter box and drainage trough link and are positioned at the leeward side of drainage trough, described splitter box radially distributes, and extends to circumferential direction simultaneously; Between the radially bypass type groove of described imitative pinion wing groove, the unslotted zone is the sealing weir, and the endless belt that on described end face, circumferential unslotted zone forms is the sealing dam, and described sealing dam is positioned at end face low voltage side, i.e. downstream.
Further, described drainage trough and splitter box sidewall molded line are helix or circular arc line or straight line.
Further, the degree of depth h of described drainage trough
1=3～50 μ m, the degree of depth h of described splitter box
2=2～20 μ m, the degree of depth h of described splitter box
2The degree of depth h that is less than or equal to drainage trough
1The span of the radially bypass type groove number N of described imitative pinion wing groove is: 3≤N≤32, the preferred value scope is: 6≤N≤20.
Further, has the sealing weir of not slotting between described each splitter box, described splitter box number N
bSpan be: 2≤N
b≤ 12, the preferred value scope is: 2≤N
b≤ 6.
Further, described splitter box is at a certain radius R
g1Or R
h1The circumferential arc length w at place
1=R
g1θ
1Or w
1=R
h1θ
1The circumferential arc length w=R in sealing weir with corresponding same radius place drainage trough
g1θ or w=R
h1The ratio w of θ
1The value preferable range of/w is w
1/ w=0.2～0.8; Described splitter box is in the radial direction groove width sum l
1With the drainage trough ratio l of groove width l radially
1The value preferable range of/l is: l
1/ l=0.4～0.8.
Further again, described splitter box is for connecting the annular groove of adjacent two drainage troughs.
Further again, the degree of depth of described splitter box is less than or equal to the degree of depth of drainage trough.
Further again, the groove depth of described drainage trough equates at the different radii place or from the end face upstream to the end face downstream, successively decreases gradually.
Working principle of the present utility model:
Use for reference the wing structure that is fit to low speed high load flight birds (as hawk, vulture etc.), wing and the wing groove configuration design face type channel profiles of imitating this type of bird.Wing trailing edge and wing tip that occurring in nature is fit to low-speed stable flight birds have obvious wing groove structure, slot in the wing groove has formed a plurality of air-flow paths, the lower aerofoil high pressure draught branches to the top airfoil low pressure area by these slots, have drag reduction and flow, weaken the effect of eddy current along ventilation, effectively improved the flight stability of low-speed operations birds.When the face type groove moves for the radially bypass type groove dry gas seals of imitative pinion wing groove, drainage trough plays the guide functions of gas Radial Flow and pump is drawn effect, splitter box plays introducing all pressure effects of current-sharing of gas in end face, air-flow produces synergistic effect in the most advanced and sophisticated formed pressure spike of a plurality of splitter boxs simultaneously, can make drainage trough and splitter box synergy by optimal design, fluid medium produces stronger pinch effect and pump and draws effect, therefore have large gas film stiffness under identical thickness, at rotating machinery, have good opening feature between the starting period.
Advantage of the present utility model and beneficial effect:
(1) a plurality of splitter boxs that are positioned at the drainage trough leeward side have better fluid flow guiding effect, end force is more evenly distributed, gas film stiffness is larger, air-flow has certain synergistic effect in the most advanced and sophisticated formed pressure spike of a plurality of splitter boxs simultaneously, make the bearing capacity of end face larger, end face is easy to open.
(2) runner of drainage trough is wider, the runner of splitter box is narrower, a plurality of convergent contour runners have been formed from drainage trough to splitter box, and groove depth can be shoaled gradually by drainage trough to splitter box, formed three-dimensional convergence type groove has better convergence property, but fluid medium produces stronger pinch effect and pump and draws effect, has larger gas film stiffness under identical thickness.
(3) the utility model is used for reference the wing groove structure of low-speed operations birds wing trailing edge, circumferential arc length ratio by changing splitter box, radial width be the position of drainage trough relatively when, can realize radially bypass type groove stable operation under different working conditions of imitative pinion wing groove, namely applicable to wider operating range.
Description of drawings
Fig. 1 is the fluting end view of the utility model case study on implementation one;
Fig. 2 is the fluting end face geometrical structure parameter unified definition schematic diagram of the utility model case study on implementation one;
Fig. 3 is A-A cross-sectional view in the utility model case study on implementation one accompanying drawing 2;
Fig. 4 is the radially bypass type groove end view of the imitative pinion wing groove with various shapes splitter box of the utility model case study on implementation two;
Fig. 5 is that the splitter box of the utility model case study on implementation three is the fluting end view of circumferential groove in its end portion;
Fig. 6 is that the downstream splitter box of the utility model case study on implementation four is the fluting end view of circumferential groove in its end portion;
Fig. 7 is that the upstream splitter box of the utility model case study on implementation four is the fluting end view of circumferential groove in its end portion.
Embodiment
By reference to the accompanying drawings enforcement of the present utility model is described in further detail.
Embodiment one
with reference to Fig. 1, Fig. 2 and Fig. 3, a kind of radially bypass type groove end surface mechanical sealing structure of imitative pinion wing groove, comprise two mechanical seals, it is rotating ring, stationary ring, in described rotating ring or stationary ring, the end face of at least one mechanical seal ring is provided with the radially bypass type groove of a plurality of imitative pinion wing grooves along the seal face circle distribution, it is upstream that the radially bypass type groove of described imitative pinion wing groove is positioned at the medium high pressure side, the radially bypass type groove of described imitative pinion wing groove comprise a drainage trough 3 and more than two like the splitter box 2 of pinion wing groove structure, described splitter box 2 is positioned at the leeward side of drainage trough 3, and splitter box radially distributes, extend to circumferential direction simultaneously.Between the radially bypass type groove of described imitative pinion wing groove, the unslotted zone is the sealing weir, and the endless belt that on described end face, circumferential unslotted zone forms is the sealing dam, and it is downstream that described sealing dam is positioned at the end face low voltage side.
Described drainage trough and splitter box sidewall molded line are helix or circular arc line or straight line.
The degree of depth h of described drainage trough 3
1=3～50 μ m, the degree of depth h of described splitter box 2
2=2～20 μ m, the degree of depth h of described splitter box 2
2The degree of depth h that is less than or equal to drainage trough 3
1The span of the radially bypass type groove number N of described imitative pinion wing groove is: 3≤N≤32, the preferred value scope is: 6≤N≤20.
Has the sealing weir of not slotting between described each splitter box 2, described splitter box 2 number N
bSpan be: 2≤N
b≤ 12, the preferred value scope is: 2≤N
b≤ 6.
Described splitter box 2 is at a certain radius R
g1Or R
h1The circumferential arc length w at place
1=R
g1θ
1Or w
1=R
h1θ
1The circumferential arc length w=R in sealing weir 1 with corresponding same radius place drainage trough 3
g1θ or w=R
h1The ratio w of θ
1The value preferable range of/w is w
1/ w=0.2～0.8; Described splitter box 2 is in the radial direction groove width sum l
1With the drainage trough 3 ratio l of groove width l radially
1The value preferable range of/l is: l
1/ l=0.4～0.8.
Described splitter box 2 is for connecting the annular groove of adjacent two drainage troughs, and the annular groove that forms between different splitter boxs is in identical or different radius.
The groove depth of described drainage trough 3 equates at the different radii place or from the end face upstream to the end face downstream, successively decreases gradually.
, for different flowing mediums, operational condition and auxiliary system operating parameter, imitate periodicity N, the splitter box quantity N of the radially bypass type groove of pinion wing groove by optimal design
b, the circumferential arc length ratio of splitter box, the splitter box radial width parameter such as major trough position relatively when, can meet the requirement of different working condition lower seal performances.
Embodiment two
With reference to Fig. 4, the present embodiment and embodiment's one difference is, the profile of splitter box can be that the sidewall molded line is triangle, quadrilateral, the rhombus, trapezoidal of straight line or circular arc line or helix, and all the other structures and mode of execution are identical with embodiment one.
Embodiment three
With reference to Fig. 5, the ratio w of the circumferential arc length on the sealing weir 1 that the circumferential arc length that the present embodiment and embodiment one difference are splitter box 2 and drainage trough 3 are corresponding
1/ w=1, namely splitter box 2 is circumferential groove in its end portion, all the other structures and mode of execution are identical with embodiment one.
Embodiment four
With reference to Fig. 6 and Fig. 7, the present embodiment and embodiment's one difference is to be positioned at the circumferential arc length w of splitter box of upstream
1The ratio w of the circumferential arc length w on sealing corresponding to drainage trough 3 weir
1/ w=R
h1θ
1/ R
h1θ and the circumferential arc length w of splitter box that is positioned at downstream
2The ratio w of the circumferential arc length w ' on the sealing weir corresponding with drainage trough 3
2/ w '=R
g1θ
1/ R
g1θ is unequal, wherein the circumferential arc length ratio w that seal the circumferential arc length on weir corresponding to drainage trough 3 that is positioned at the splitter box of upstream shown in Figure 6
1/ w＜1, be positioned at the ratio w of circumferential arc length on the circumferential arc length of splitter box sealing corresponding to drainage trough 3 weir in downstream
2/ w '=1; Be positioned at the circumferential arc length ratio w that seal the circumferential arc length on weir corresponding to drainage trough 3 of the splitter box of upstream in Fig. 7
1/ w=1, be positioned at the ratio w of circumferential arc length on the circumferential arc length of splitter box sealing corresponding to drainage trough 3 weir in downstream
2/ w '＜1, all the other structures and mode of execution are identical with embodiment one.
The described content of this specification embodiment is only enumerating the way of realization of model utility design; protection domain of the present utility model should not be regarded as only limiting to the concrete form that embodiment states, protection domain of the present utility model also reaches in those skilled in the art according to the thinkable equivalent technologies means of the utility model design.
Claims (8)
1. imitate the radially bypass type groove end surface mechanical sealing structure of pinion wing groove, comprise two mechanical seal rings, be rotating ring and stationary ring, it is characterized in that: in described rotating ring and stationary ring, the end face of at least one mechanical seal ring is provided with the radially bypass type groove of a plurality of circumferential imitative pinion wing grooves, the radially bypass type groove of described imitative pinion wing groove is positioned at medium high pressure side, i.e. upstream; The radially bypass type groove of described imitative pinion wing groove comprise a drainage trough and more than two like the splitter box of pinion wing groove structure, described splitter box and drainage trough link and are positioned at the leeward side of drainage trough, described splitter box radially distributes, and extends to circumferential direction simultaneously; Between the radially bypass type groove of described imitative pinion wing groove, the unslotted zone is the sealing weir, and the endless belt that on described end face, circumferential unslotted zone forms is the sealing dam, and described sealing dam is positioned at end face low voltage side, i.e. downstream.
2. sealing configuration according to claim 1, it is characterized in that: described drainage trough and splitter box sidewall molded line are helix or circular arc line or straight line.
3. sealing configuration according to claim 2, is characterized in that: the degree of depth h of described drainage trough
1=3～50 μ m, the degree of depth h of described splitter box
2=2～20 μ m, the degree of depth h of described splitter box
2The degree of depth h that is less than or equal to drainage trough
1The span of the radially bypass type groove number N of described imitative pinion wing groove is: 3≤N≤32.
4. sealing configuration according to claim 3, is characterized in that: have the sealing weir of not slotting between described each splitter box, described splitter box number N
bSpan be: 2≤N
b≤ 12.
5. sealing configuration according to claim 4, it is characterized in that: described splitter box is at a certain radius R
g1Or R
h1The circumferential arc length w at place
1=R
g1θ
1Or w
1=R
h1θ
1The circumferential arc length w=R in sealing weir with corresponding same radius place drainage trough
g1θ or w=R
h1The ratio w of θ
1The value preferable range of/w is w
1/ w=0.2～0.8; Described splitter box is in the radial direction groove width sum l
1With the drainage trough ratio l of groove width l radially
1The value preferable range of/l is: l
1/ l=0.4～0.8.
6. sealing configuration according to claim 4 is characterized in that: described splitter box is for connecting the annular groove of adjacent two drainage troughs.
7. according to claim 5 or 6 described sealing configurations, it is characterized in that: the degree of depth of described splitter box is less than or equal to the degree of depth of drainage trough.
8. according to claim 5 or 6 described sealing configurations is characterized in that: the groove depth of described drainage trough equates at the different radii place or from the end face upstream to the end face downstream, successively decreases gradually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200865924U CN203285989U (en) | 2013-02-26 | 2013-02-26 | Radial shunting type groove end face mechanical sealing structure simulating bird wing groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200865924U CN203285989U (en) | 2013-02-26 | 2013-02-26 | Radial shunting type groove end face mechanical sealing structure simulating bird wing groove |
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| Publication Number | Publication Date |
|---|---|
| CN203285989U true CN203285989U (en) | 2013-11-13 |
Family
ID=49542351
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200865924U Expired - Fee Related CN203285989U (en) | 2013-02-26 | 2013-02-26 | Radial shunting type groove end face mechanical sealing structure simulating bird wing groove |
Country Status (1)
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|---|---|
| CN (1) | CN203285989U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185140A (en) * | 2013-02-26 | 2013-07-03 | 浙江工业大学 | Mechanical sealing structure for radial shunt type groove end faces of pinion-like grooves |
| CN104235371A (en) * | 2014-09-03 | 2014-12-24 | 浙江工业大学 | Mechanical sealing structure for end face of lightning groove |
| CN114857274A (en) * | 2022-03-31 | 2022-08-05 | 清华大学 | End face seal assembly |
-
2013
- 2013-02-26 CN CN2013200865924U patent/CN203285989U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185140A (en) * | 2013-02-26 | 2013-07-03 | 浙江工业大学 | Mechanical sealing structure for radial shunt type groove end faces of pinion-like grooves |
| CN103185140B (en) * | 2013-02-26 | 2016-06-22 | 浙江工业大学 | The radial direction bypass type groove end surface mechanical sealing structure of imitative pinion wing groove |
| CN104235371A (en) * | 2014-09-03 | 2014-12-24 | 浙江工业大学 | Mechanical sealing structure for end face of lightning groove |
| CN104235371B (en) * | 2014-09-03 | 2016-06-15 | 浙江工业大学 | A kind of lightning class groove end surface mechanical sealing structure |
| CN114857274A (en) * | 2022-03-31 | 2022-08-05 | 清华大学 | End face seal assembly |
| CN114857274B (en) * | 2022-03-31 | 2023-08-25 | 清华大学 | End face seal assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131113 Termination date: 20170226 |