CN203686153U - Bird wing imitation type multi-passage groove end surface sealing structure - Google Patents
Bird wing imitation type multi-passage groove end surface sealing structure Download PDFInfo
- Publication number
- CN203686153U CN203686153U CN201320519380.0U CN201320519380U CN203686153U CN 203686153 U CN203686153 U CN 203686153U CN 201320519380 U CN201320519380 U CN 201320519380U CN 203686153 U CN203686153 U CN 203686153U
- Authority
- CN
- China
- Prior art keywords
- drainage trough
- arc groove
- pinion type
- groove
- imitative
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to a bird wing imitation type multi-passage groove end surface sealing structure, which comprises a movable ring and a static ring in mechanical sealing, wherein a plurality of bird wing imitation type multi-passage grooves in uniform distribution in the circumferential direction are formed on the end surface of at least one sealing ring of the movable ring or the static ring, the bird wing imitation type multi-passage grooves are positioned the high-pressure side of the media, i.e., the upstream part, and comprise two or more than two drainage grooves and one or a plurality of circular arc grooves, the circular arc grooves are positioned at the downstream part of the drainage grooves and are connected with the drainage grooves, the drainage grooves are respectively communicated with the upstream part or the high-pressure side of the media, are in uniform distribution in the circumferential direction and are isolated by sealing weirs without grooving, an annular belt formed in a groove-free region in the circumferential direction on the end surface is a sealing dam, and the sealing dam is positioned at the low-pressure side of the end surface, i.e., the downstream part. The bird wing imitation type multi-passage groove end surface sealing structure has the advantages that the static pressure effect of the end surface is high, the power consumption is low, the operation stability at low speed is good, the leakage quantity is small, the anti-interference performance is excellent, and the bird wing imitation type multi-passage groove end surface sealing structure is particularly applicable to a noncontact dry type gas sealing end surface sealing device for equipment such as reaction kettles and stirrers.
Description
Technical field
The utility model relates to a kind of imitative pinion type multichannel groove end face seal structure, belongs to the contactless dry gas seal device of running shaft, is applicable to the rotating equipment rotating shaft shaft end seal devices such as various compressors, pump and still.
Background technique
The rotating shaft of rotary type fluid machine equipment generally adopts conventional machinery sealing or contactless end face seal, for the power consumption of avoiding " fluid-tight liquid " or " fluid-tight gas " to bring high, equipment investment is large, lubrication and cooling system complexity, leak the problems such as large, improve the opening feature of mechanical seal, stability, sealing is also energy-saving and cost-reducing, enter late 1970s, sealing technique starts to substitute above-mentioned common contact-type or non-contact liquid lubricating mechanical sealing with the dry gas seal part of " sealing gland liquid " or " sealing gland gas ", and obtain remarkable effect, wherein with John Crane(www.johncrane.com), Flowserve(www.flowserve.com) and Bergmann(www.eagleburgmann.com) for the world-renowned sealing enterprise of representative has developed spiral chute in succession, single direction rotation dry gas seal and the fir-tree type grooves such as the spiral chute with inner groove and V-type groove, the bidirectional rotation dry gas seals such as T-shaped groove and U-shaped groove, and Chinese patent 96108614.9(double-loop spiral-slot end sealing), 98103575.2(bidirectional rotation double-row double-blade spiral groove face sealing), 200910153312.5(double-row tilting directional microporous end surface no-leakage mechanical sealing structure), 01102213.2(spiral groove end sealer capable of being rotated in both directions), 02146449.9(Unit for sealing end surface of 3 D helical flute with double helix angles), 201310059819.0(dovetail groove end surface mechanical sealing structure that can bidirectional rotation) etc. be all the successful case of dry gas face seals.Above-mentioned dry gas face seals generally all exist start or stopping performance poor, the larger or undesirable deficiency of anti-external disturbance ability of leak-down rate, is difficult to meet the special service condition such as low speed, frequent starting.
Summary of the invention
In order to overcome hermetic seal above shortcomings in dry prior art, the utility model is based on bionics principle and kinetic theory of gas, use for reference the special role of low-speed operations high load birds in regime of flight lower wing board alula structure, provide a kind of at low speed low pressure or low speed heavy pressure operating mode lower end surface hydrostatic effects is strong, gas film stiffness is large and leak-down rate is low imitative pinion type multichannel groove end face seal structure.Than above-mentioned dry gas face seals, the utility model combines the advantage of existing dry gas face seals,
Technical solutions of the utility model:
A kind of imitative pinion type multichannel groove end face seal structure, comprise two mechanical seal rings, be rotating ring and stationary ring, it is characterized in that: the end face of described rotating ring or at least one seal ring of stationary ring is provided with multiple many grooves of imitative pinion type that distribute along even circumferential, the many grooves of described imitative pinion type are positioned at medium high pressure side, i.e. upstream; The many grooves of described imitative pinion type comprise more than two drainage trough 2 and one or more arc groove 3, described arc groove 3 is positioned at the downstream side of drainage trough 2 and is connected with each drainage trough 2, described drainage trough 2 is connected with seal ring external diameter, described plural drainage trough 2 is along circumferentially distributing, between described each drainage trough 2, isolate with the sealing weir 1 of not slotting, the endless belt that on described end face, circumferentially unslotted region forms is sealing dam 4, and described sealing dam 4 is positioned at end face low voltage side, i.e. downstream.
Further, the sidewall molded line of described drainage trough is helix or circular arc line or straight line.
Further, the degree of depth h of described drainage trough 2
1=3～30 μ m, the degree of depth h of described arc groove 3
2=2～20 μ m; The span of described imitative many grooves of pinion type number N is: 4≤N≤30, preferred value scope is: 6≤N≤20.
Further, described drainage trough 2 is at the circumferential arc length sum w at end face cylindrical place
1=r
o(θ
2+ θ
1) imitate the circumferential arc length w=r of the many grooves of pinion type with same radius place
othe value preferable range of the ratio of θ is: w
1/ w=0.2-0.8, described arc groove 3 is at groove width l in the radial direction
1=r
b-r
gradially fluting overall width l=r with imitative pinion type multichannel groove
o-r
gthe value preferable range of ratio be: l
1/ l=0.1～0.5.
Further, described drainage trough is that biserial is communicated with spiral chute, described upstream spiral chute and downstream spiral fluted helix angle opposite direction, and described downstream spiral chute and arc groove are connected.
Further, the number N of described drainage trough
y=3, described three drainage troughs are along circumferentially distribution, the number N of described arc groove
h=2, described arc groove radially distributes; Middle drainage trough and leeward side drainage trough connect by upstream arc groove, and described middle drainage trough is not communicated with downstream arc groove.
Further, the number N of described drainage trough
y=3, described three drainage troughs are along circumferentially distribution, the number N of described arc groove
h=2, described arc groove radially distributes; In the middle of described, drainage trough and windward side drainage trough connect by upstream arc groove, and described middle drainage trough is not communicated with downstream arc groove.
Further, the number N of described drainage trough
y=4, described four drainage troughs, the long drainage trough 2b of windward side, the short drainage trough 2d of windward side, the short drainage trough 2c of leeward side, the long drainage trough 2a of leeward side are along circumferentially distribution, the number N of described arc groove
h=2, described arc groove radially distributes; The short drainage trough 2d of described windward side and the short drainage trough 2c of leeward side connect by upstream arc groove 3a, the short drainage trough 2d of described windward side or leeward side drainage trough 2c are not communicated with downstream arc groove 3b, and the long drainage trough 2a of leeward side is communicated with by downstream arc groove 3b with the long drainage trough 2b of windward side.
Further, the degree of depth of described arc groove is less than or equal to the degree of depth of drainage trough.
Further, the groove depth of described drainage trough is identical or shoal gradually from end face upstream to end face downstream at different radii place.
Working principle of the present utility model:
Use for reference the wing structure that is applicable to low-speed operations birds, imitate this type of flying bird wing profile and alula structural design face type channel profiles.There is alula structure the birds wing aerofoil top that occurring in nature is applicable to low-speed stable flight, between alula and top airfoil, have and multiplely can pass through slot by air feed stream, front incoming flow is had to stronger water conservancy diversion and the effect of confluxing, can effectively prevent that air-flow from departing from aerofoil too early and forming eddy current, thereby effectively avoid the generation of stall situation in-flight.In the time that face type groove moves for imitative pinion type multichannel groove dry gas seals, guide functions and pump that multiple drainage troughs play gas Radial Flow draw effect, downstream arc groove plays all pressures pressure stabilization function to introducing end face inner fluid, multiple drainage troughs have also been connected simultaneously, a plurality of fluids is confluxed at leeward side drainage trough groove root place, therefore under identical thickness, there is larger gas film stiffness, in addition, arc groove convection cell has circumferential guide functions, compares and has lower leakage with the spiral chute under identical operating mode.
Advantage of the present utility model and beneficial effect:
1, the multiple drainage troughs that are positioned at upstream side have stronger guide functions and pump draws effect, can produce better fluid active and static pressure effect, and end face bearing capacity is larger; Arc groove has connected multiple drainage troughs, makes a plurality of fluids stack of confluxing at leeward side drainage trough groove root place, has further improved the bearing capacity of end face, thereby has made end face be easy under the low speed quick unlatching.
2, arc groove convection cell has the effect of circumferential water conservancy diversion and current-sharing voltage stabilizing, thereby makes type groove can effectively reduce leakage in producing high fluid film rigidity, has excellent comprehensive sealing performance.
3, the utility model is used for reference the alula structure of low-speed operations birds wing leading edge, by changing the when when position of relative drainage trough of radial width of arc groove of circumferential width of drainage trough, can realize imitative pinion type multichannel groove stable operation under different working conditions, applicable to wider operating range.
Brief description of the drawings
Fig. 1 is the imitative pinion type bilateral groove end-face structure schematic diagram of the utility model;
Fig. 2 a is the imitative pinion type bilateral groove end face geometrical structure parameter definition of the utility model schematic diagram;
Fig. 2 b is that the A-A of Fig. 2 a is to sectional view;
Fig. 3 is that the imitative pinion type multichannel groove end-face structure of the utility model is at medium low-side arrangement schematic diagram;
Fig. 4 is the imitative pinion type multichannel groove double-vane end-face structure schematic diagram of the utility model example two;
Fig. 5 is the structural representation that the imitative pinion type multichannel groove of the utility model example three confluxes at leeward side;
Fig. 6 is the structural representation that the imitative pinion type multichannel groove of the utility model example four confluxes at windward side
Fig. 7 is the structural representation of the multiple bilateral series connection of the imitative pinion type multichannel groove of the utility model example five.
Embodiment
By reference to the accompanying drawings enforcement of the present utility model is described in further detail.
Embodiment one
Referring to Fig. 1, Fig. 2 and Fig. 3, a kind of imitative many grooves of pinion type end face seal structure in this example, it comprises two mechanical seal rings, be rotating ring and stationary ring, it is characterized in that: the end face of described rotating ring or at least one seal ring of stationary ring is provided with multiple many grooves of imitative pinion type that distribute along even circumferential, the many grooves of described imitative pinion type are positioned at medium high pressure side, i.e. upstream; The many grooves of described imitative pinion type comprise more than two drainage trough 2 and one or more arc groove 3, described arc groove 3 is positioned at the downstream side of drainage trough 2 and is connected with each drainage trough 2, described drainage trough 2 is connected with seal ring external diameter, described plural drainage trough 2 is along circumferentially distributing, between described each drainage trough 2, isolate with the sealing weir 1 of not slotting, the endless belt that on described end face, circumferentially unslotted region forms is sealing dam 4, and described sealing dam 4 is positioned at end face low voltage side, i.e. downstream.
The sidewall molded line of described drainage trough 2 is helix or circular arc line or straight line.
The degree of depth h of described drainage trough 2
1=3～30 μ m, the degree of depth h of described arc groove 3
2=2～20 μ m; The span of described imitative many grooves of pinion type number N is: 4≤N≤30, preferred value scope is: 6≤N≤20.
Described drainage trough 2 is at the circumferential arc length sum w at end face cylindrical place
1=r
o(θ
2+ θ
1) imitate the circumferential arc length w=r of the many grooves of pinion type with same radius place
othe value preferable range of the ratio of θ is: w
1/ w=0.2-0.8, described arc groove 3 is at groove width l in the radial direction
1=r
b-r
gradially fluting overall width l=r with imitative pinion type multichannel groove
o-r
gthe value preferable range of ratio be: l
1/ l=0.1～0.5.
The groove depth of described drainage trough 2 equates from end face upstream to end face downstream or successively decreases gradually.
For different flowing mediums, operational condition and auxiliary system operating parameter, imitate periodicity N, the drainage trough quantity N of the many grooves of pinion type by optimal design
b, the when parameter such as major trough position relatively of the circumferential arc length ratio of drainage trough, collecting tray radial width, can meet the requirement of different working condition lower seal performances.
Embodiment two
Referring to Fig. 4, the present embodiment and embodiment's one difference is, described drainage trough 2 is biserial connection spiral chute, the helix angle opposite direction of described upstream spiral chute 2a and downstream spiral chute 2b, described downstream spiral chute 2b and arc groove 3 are connected, and all the other structures and mode of execution are identical with embodiment one.
Embodiment three
Referring to Fig. 5, the present embodiment and embodiment's one difference is, the number N of described drainage trough
y=3, described three drainage troughs are along circumferentially distribution, the number N of described arc groove
h=2, described arc groove radially distributes, and described middle drainage trough 2c and leeward side drainage trough 2a connect by upstream arc groove 3a, and described middle drainage trough 2c is not communicated with downstream arc groove 3b, and all the other structures and mode of execution are identical with embodiment one.
Embodiment four
Referring to Fig. 6, the present embodiment and embodiment's one difference is, the number N of described drainage trough
y=3, described three drainage troughs are along circumferentially distribution, the number N of described arc groove
h=2, described arc groove radially distributes, and described middle drainage trough 2c and windward side drainage trough 2b connect by upstream arc groove 3a, and described middle drainage trough 2c is not communicated with downstream arc groove 3b, and all the other structures and mode of execution are identical with embodiment one.
Embodiment five
Referring to Fig. 7, this example is with embodiment one difference, the number N of described drainage trough
y=4, described four drainage troughs, the long drainage trough 2b of windward side, the short drainage trough 2d of windward side, the short drainage trough 2c of leeward side, the long drainage trough 2a of leeward side are along circumferentially distribution, the number N of described arc groove
h=2, described arc groove radially distributes; The short drainage trough 2d of described windward side and the short drainage trough 2c of leeward side connect by upstream arc groove 3a, the short drainage trough 2d of described windward side or leeward side drainage trough 2c are not communicated with downstream arc groove 3b, the long drainage trough 2a of leeward side is communicated with by downstream arc groove 3b with the long drainage trough 2b of windward side, and all the other structures and mode of execution are identical with embodiment one.
Content described in this specification embodiment is only enumerating of way of realization to 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 and in those skilled in the art is conceived thinkable equivalent technologies means according to the utility model.
Claims (9)
1. imitative pinion type multichannel groove end face seal structure, comprise two mechanical seal rings, be rotating ring and stationary ring, it is characterized in that: the end face of described rotating ring or at least one seal ring of stationary ring is provided with multiple many grooves of imitative pinion type that distribute along even circumferential, the many grooves of described imitative pinion type are positioned at medium high pressure side, i.e. upstream; The many grooves of described imitative pinion type comprise more than two drainage trough (2) and one or more arc groove (3), described arc groove (3) is positioned at the downstream side of drainage trough (2) and is connected with each drainage trough (2), described drainage trough (2) is connected with seal ring external diameter, described plural drainage trough (2) is along circumferentially distributing, sealing weir (1) isolation not slot between described each drainage trough (2), the endless belt that on described end face, circumferentially unslotted region forms is sealing dam (4), described sealing dam (4) is positioned at end face low voltage side, i.e. downstream.
2. imitative pinion type multichannel groove end face seal structure according to claim 1, is characterized in that: the sidewall molded line of described drainage trough is helix or circular arc line or straight line.
3. imitative pinion type multichannel groove end face seal structure according to claim 2, is characterized in that: the degree of depth h of described drainage trough (2)
1=3～30 μ m, the degree of depth h of described arc groove (3)
2=2～20 μ m; The span of described imitative many grooves of pinion type number N is: 4≤N≤30.
4. imitative pinion type multichannel groove end face seal structure according to claim 3, is characterized in that: the span of described imitative many grooves of pinion type number N is: 6≤N≤20.
5. imitative pinion type multichannel groove end face seal structure according to claim 4, is characterized in that: the degree of depth of described arc groove is less than or equal to the degree of depth of drainage trough; The groove depth of described drainage trough radially shoals gradually from end face upstream to end face downstream.
6. imitative pinion type multichannel groove end face seal structure according to claim 4, it is characterized in that: described drainage trough is that biserial is communicated with spiral chute, described upstream spiral chute and downstream spiral fluted helix angle opposite direction, described downstream spiral chute and arc groove are connected.
7. imitative pinion type multichannel groove end face seal structure according to claim 4, is characterized in that: the number N of described drainage trough
y=3, described three drainage troughs are along circumferentially distribution, the number N of described arc groove
h=2, described arc groove radially distributes; Middle drainage trough and leeward side drainage trough connect by upstream arc groove, and described middle drainage trough is not communicated with downstream arc groove.
8. imitative pinion type multichannel groove end face seal structure according to claim 7, is characterized in that: the number N of described drainage trough
y=3, described three drainage troughs are along circumferentially distribution, the number N of described arc groove
h=2, described arc groove radially distributes; In the middle of described, drainage trough and windward side drainage trough connect by upstream arc groove, and described middle drainage trough is not communicated with downstream arc groove.
9. imitative pinion type multichannel groove end face seal structure according to claim 8, is characterized in that: the number N of described drainage trough
y=4, described four drainage troughs, the long drainage trough of windward side (2b), the short drainage trough of windward side (2d), the short drainage trough of leeward side (2c), the long drainage trough of leeward side (2a) are along circumferentially distribution, the number N of described arc groove
h=2, described arc groove radially distributes; The short drainage trough of described windward side (2d) connects by upstream arc groove (3a) with the short drainage trough of leeward side (2c), the short drainage trough of described windward side (2d) or leeward side drainage trough (2c) are not communicated with downstream arc groove (3b), and the long drainage trough 2a of leeward side is communicated with by downstream arc groove (3b) with the long drainage trough of windward side (2b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320519380.0U CN203686153U (en) | 2013-08-23 | 2013-08-23 | Bird wing imitation type multi-passage groove end surface sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320519380.0U CN203686153U (en) | 2013-08-23 | 2013-08-23 | Bird wing imitation type multi-passage groove end surface sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203686153U true CN203686153U (en) | 2014-07-02 |
Family
ID=51008053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320519380.0U Expired - Fee Related CN203686153U (en) | 2013-08-23 | 2013-08-23 | Bird wing imitation type multi-passage groove end surface sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203686153U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927287A (en) * | 2012-11-12 | 2013-02-13 | 南京林业大学 | Mechanical end face seal with combined fluid slot structure |
| CN103470773A (en) * | 2013-08-23 | 2013-12-25 | 浙江工业大学 | Bird-wing-imitated multichannel groove end face seal structure |
| CN104913066A (en) * | 2015-06-15 | 2015-09-16 | 浙江工业大学 | Mechanical sealing structure of gas lubricating end face with human pyramid-like combined groove deep grooves |
| CN110848390A (en) * | 2019-10-28 | 2020-02-28 | 江苏大学 | Local circular arc texturing mechanical seal |
-
2013
- 2013-08-23 CN CN201320519380.0U patent/CN203686153U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927287A (en) * | 2012-11-12 | 2013-02-13 | 南京林业大学 | Mechanical end face seal with combined fluid slot structure |
| CN103470773A (en) * | 2013-08-23 | 2013-12-25 | 浙江工业大学 | Bird-wing-imitated multichannel groove end face seal structure |
| CN103470773B (en) * | 2013-08-23 | 2016-08-10 | 浙江工业大学 | Imitative pinion type multichannel groove end face seal structure |
| CN104913066A (en) * | 2015-06-15 | 2015-09-16 | 浙江工业大学 | Mechanical sealing structure of gas lubricating end face with human pyramid-like combined groove deep grooves |
| CN104913066B (en) * | 2015-06-15 | 2019-02-01 | 浙江工业大学 | Like the compound groove depth type groove gas lubrication end surface mechanical sealing structure of pyramid |
| CN110848390A (en) * | 2019-10-28 | 2020-02-28 | 江苏大学 | Local circular arc texturing mechanical seal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103470773B (en) | Imitative pinion type multichannel groove end face seal structure | |
| CN101644333B (en) | Gas end surface sealing structure with three-dimensional feather-like textured bottom shaped grooves | |
| CN205877184U (en) | Mechanical seal ring with imitative chinese sweet gum lobate shaped groove | |
| CN103185140B (en) | The radial direction bypass type groove end surface mechanical sealing structure of imitative pinion wing groove | |
| CN203686153U (en) | Bird wing imitation type multi-passage groove end surface sealing structure | |
| CN104913066A (en) | Mechanical sealing structure of gas lubricating end face with human pyramid-like combined groove deep grooves | |
| CN106015571A (en) | Mechanical seal ring with maple-leaf-like grooves | |
| CN103122998A (en) | Sharkskin imitation streamline groove end face mechanical sealing structure | |
| CN103133697B (en) | Can the dovetail groove end surface mechanical sealing structure of bidirectional rotation | |
| CN103453147A (en) | Non-contact mechanical seal ring with dual-rotating-direction hydrodynamic grooves | |
| CN203413119U (en) | Sharkskin imitation streamline groove end face mechanical sealing structure | |
| CN103775389A (en) | Radial guide blade for sectional multistage pump | |
| CN104896099A (en) | Gas lubrication cluster spiral groove end face mechanical sealing structure | |
| CN105987175B (en) | The mechanical seal structure combined with three-dimensional like flakes groove profile with various passes | |
| CN205350360U (en) | Liquid film seal end face slot type structure that can two -way rotation | |
| CN203285989U (en) | Radial shunting type groove end face mechanical sealing structure simulating bird wing groove | |
| CN102588601A (en) | Mechanical sealing structure with flower and plant simulating fluid type groove end surfaces | |
| CN204739222U (en) | Gas lubrication helicla flute terminal surface mechanical seal structure tied in a bundle | |
| CN204985726U (en) | Like compound groove depth type groove gas lubrication terminal surface mechanical seal structure of pyramid | |
| CN204573105U (en) | The non-contact mechanical seal structure that directivity macropore combines with three dimensional type groove | |
| CN201521636U (en) | Gas face seal structure of three-dimensional shaped groove with bottom similar to feather texture | |
| CN205559791U (en) | Two Y type groove terminal surface mechanical seal structure of symmetric distribution | |
| CN204187000U (en) | A kind of lightning class groove end surface mechanical sealing structure | |
| CN203285990U (en) | Dovetail groove end face mechanical sealing structure capable of rotating in two directions | |
| CN205639618U (en) | Mechanical seal end face slot type structure with bispin is to hydrodynamic effect |
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 |
Granted publication date: 20140702 Termination date: 20170823 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |