CN117989328A - Non-contact sealing device - Google Patents
Non-contact sealing device Download PDFInfo
- Publication number
- CN117989328A CN117989328A CN202311830818.1A CN202311830818A CN117989328A CN 117989328 A CN117989328 A CN 117989328A CN 202311830818 A CN202311830818 A CN 202311830818A CN 117989328 A CN117989328 A CN 117989328A
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- Prior art keywords
- groove
- grooves
- face
- dynamic pressure
- axial end
- Prior art date
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Links
- 238000007789 sealing Methods 0.000 title claims abstract description 47
- 230000002209 hydrophobic effect Effects 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 8
- 239000012530 fluid Substances 0.000 abstract description 22
- 230000000694 effects Effects 0.000 abstract description 10
- 230000003068 static effect Effects 0.000 description 5
- 238000010008 shearing Methods 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Mechanical Sealing (AREA)
Abstract
The invention provides a non-contact sealing device which comprises a movable ring and a stationary ring, wherein one axial end face of the movable ring is opposite to one axial end face of the stationary ring, one of the axial end face of the movable ring facing the stationary ring and the axial end face of the stationary ring facing the movable ring is provided with dynamic pressure grooves, reverse pump grooves and drainage grooves, the dynamic pressure grooves are a plurality of the reverse pump grooves which are distributed at intervals along the circumferential direction of the axial end face, the drainage grooves are annular extending along the circumferential direction of the axial end face, and the dynamic pressure grooves, the reverse pump grooves and the drainage grooves are distributed at intervals in sequence along the radial direction of the axial end face along the direction facing the center of the axial end face. The non-contact sealing device is provided with the plurality of dynamic pressure grooves, the plurality of reverse pump grooves and the drain grooves which are sequentially arranged at intervals along the radial direction on the axial end face, dynamic pressure effect is generated through the dynamic pressure grooves, fluid reversely flows through the reverse pump grooves, and the fluid is stopped through the edge effect of the drain grooves, so that the leakage of the fluid is avoided.
Description
Technical Field
The invention relates to the field of sealing devices, in particular to a non-contact sealing device.
Background
The non-contact seal is a mechanical seal that is formed by filling a complete fluid film between the seal faces by hydrostatic or hydrodynamic pressure to force the seal faces apart from each other without hard solid contact. In the related art, the non-contact sealing is realized by arranging a spiral groove, a herringbone groove, a Y-shaped groove and the like on the end face, but under the working conditions of high speed and high vibration, the non-contact sealing device in the related art has the condition of lubricating oil leakage.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, embodiments of the present invention provide a non-contact sealing device.
The non-contact sealing device comprises a movable ring and a stationary ring, wherein one axial end face of the movable ring is opposite to one axial end face of the stationary ring, one of the axial end face of the movable ring facing the stationary ring and the axial end face of the stationary ring facing the movable ring is provided with dynamic pressure grooves, reverse pump grooves and drainage grooves, the dynamic pressure grooves are distributed at intervals along the circumferential direction of the axial end face, the reverse pump grooves are distributed at intervals along the circumferential direction of the axial end face, the drainage grooves are annular extending along the circumferential direction of the axial end face, and the dynamic pressure grooves, the reverse pump grooves and the drainage grooves are distributed at intervals in sequence along the radial direction of the axial end face along the direction facing the center of the axial end face.
According to the non-contact sealing device, the plurality of dynamic pressure grooves, the plurality of reverse pumping grooves and the drain grooves are sequentially arranged on the axial end face at intervals along the radial direction, dynamic pressure effects are generated through the dynamic pressure grooves, fluid reversely flows through the reverse pumping grooves, and the fluid is stopped through the edge effect of the drain grooves, so that fluid leakage is avoided.
In some embodiments, a first sealing dam is formed between the plurality of dynamic pressure grooves and the plurality of reverse pump grooves along the radial direction of the axial end surface, the first sealing dam is annular extending along the circumferential direction of the axial end surface, and the distance between the first sealing dam and the radial direction of the axial end surface is 0.1 mm-10 mm.
In some embodiments, a second sealing dam is formed between the plurality of anti-pump grooves and the hydrophobic groove along the radial direction of the axial end surface, the second sealing dam is annular extending along the circumferential direction of the axial end surface, and the distance between the second sealing dam and the hydrophobic groove along the radial direction of the axial end surface is 0.1 mm-1 mm.
In some embodiments, the drain tank has a tank depth of 0.5mm to 3mm.
In some embodiments, the dynamic pressure grooves extend in a radial direction of the axial end face and are arranged obliquely in a circumferential direction of the axial end face, and the plurality of dynamic pressure grooves are aligned in an oblique direction in the circumferential direction of the axial end face.
In some embodiments, the dynamic pressure grooves have a spiral, arc or oval cross section.
In some embodiments, the reverse pump groove comprises a reverse dynamic pressure groove and an auxiliary groove which are communicated, the reverse dynamic pressure groove extends along the circumferential direction of the axial end face, one end of the reverse dynamic pressure groove, which faces the center of the axial end face, is provided with a plurality of auxiliary grooves, and the auxiliary grooves are distributed at intervals along the circumferential direction of the axial end face.
In some embodiments, the reverse dynamic pressure groove has a spiral, arc or triangle cross section;
The cross section of the auxiliary groove is quadrilateral.
In some embodiments, the auxiliary groove has a rectangular, diamond or arcuate quadrilateral cross section.
In some embodiments, the reverse pump groove has a groove depth of 2 μm to 5 μm;
the groove depth of the dynamic pressure groove is 2-5 mu m.
Drawings
FIG. 1 is a schematic view of a non-contact sealing device according to an embodiment of the present invention;
FIG. 2 is a schematic view of the axial end face of the moving ring of FIG. 1;
Fig. 3 is an enlarged schematic view of a portion of the axial end face of the moving ring of fig. 2.
Reference numerals:
1. A moving ring; 2. a stationary ring; 3. dynamic pressure grooves; 4. a reverse pump tank; 41. reverse dynamic pressure groove; 42. an auxiliary groove; 5. a water drain tank; 6. a first sealing dam; 7. and a second sealing dam.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
A noncontact sealing device according to an embodiment of the present invention is described below with reference to fig. 1 to 3.
As shown in fig. 1 to 3, the non-contact sealing device of the embodiment of the present invention includes a moving ring 1 and a stationary ring 2.
One axial end face of the moving ring 1 and one axial end face of the static ring 2 are oppositely arranged, one of the axial end face of the moving ring 1 facing the static ring 2 and the axial end face of the static ring 2 facing the moving ring 1 is provided with a dynamic pressure groove 3, a reverse pump groove 4 and a drain groove 5, the dynamic pressure groove 3 is a plurality of the reverse pump grooves which are distributed along the circumferential direction of the axial end face at intervals, the reverse pump groove 4 is a plurality of the drain groove 5 is an annular extending along the circumferential direction of the axial end face, and the plurality of dynamic pressure grooves 3, the reverse pump grooves 4 and the drain groove 5 are distributed along the radial direction of the axial end face along the direction facing the center of the axial end face at intervals in sequence.
As shown in fig. 1 and 2, the moving ring 1 and the stationary ring 2 are circular rings surrounding the vertical direction, and the moving ring 1 and the stationary ring 2 are coaxially arranged, and the moving ring 1 and the stationary ring 2 are oppositely arranged along the up-down direction, preferably, the moving ring 1 is located below the stationary ring 2, and the moving ring 1 can rotate around the vertical direction relative to the stationary ring 2.
One of the upper end surface of the moving ring 1 and the lower end surface of the stationary ring 2 is provided with a dynamic pressure groove 3, a reverse pump groove 4 and a drain groove 5, and preferably the upper end surface of the moving ring 1 is provided with a dynamic pressure groove 3, a reverse pump groove 4 and a drain groove 5. It will be appreciated that in other embodiments, the dynamic pressure groove 3, the reverse pump groove 4 and the water drain groove 5 may be provided in the lower end surface of the stationary ring 2.
The dynamic pressure grooves 3 are a plurality of the dynamic pressure grooves 3 which are arranged at intervals along the circumferential direction of the moving ring 1, the reverse pump grooves 4 are a plurality of the reverse pump grooves 4 which are arranged at intervals along the circumferential direction of the moving ring 1, the water drain grooves 5 are annular which extends along the circumferential direction of the moving ring 1, the plurality of dynamic pressure grooves 3, the plurality of reverse pump grooves 4 and the water drain grooves 5 are sequentially arranged at intervals along the radial direction of the moving ring 1 in the direction of the center line of the moving ring 1, in other words, the plurality of reverse pump grooves 4 encircle one side of the water drain grooves 5 away from the center line of the moving ring 1, and the plurality of dynamic pressure grooves 3 encircle one side of the plurality of reverse pump grooves 4 away from the center line of the moving ring 1.
Preferably, the groove depth of the drain groove 5 is 0.5mm to 3mm, the groove depth of the reverse pump groove 4 is 2 μm to 5 μm, and the groove depth of the dynamic pressure groove 3 is 2 μm to 5 μm.
According to the non-contact sealing device, the plurality of dynamic pressure grooves, the plurality of reverse pumping grooves and the drain grooves are sequentially arranged on the axial end face at intervals along the radial direction, dynamic pressure effects are generated through the dynamic pressure grooves, fluid reversely flows through the reverse pumping grooves, and the fluid is stopped through the edge effect of the drain grooves, so that fluid leakage is avoided.
In some embodiments, a first sealing dam 6 is formed between the plurality of dynamic pressure grooves 3 and the plurality of reverse pump grooves 4 along the radial direction of the axial end face, the first sealing dam 6 is annular extending along the circumferential direction of the axial end face, and the distance of the first sealing dam 6 along the radial direction of the axial end face is 0.1 mm-10 mm.
As shown in fig. 1 and 2, the upper end surface of the moving ring 1 forms a first seal dam 6 at a space portion between the plurality of dynamic pressure grooves 3 and the plurality of reverse pump grooves 4, in other words, the first seal dam 6 is located between the plurality of dynamic pressure grooves 3 and the plurality of reverse pump grooves 4 in the radial direction of the moving ring 1. The first sealing dam 6 is annular extending along the circumferential direction of the moving ring 1, and the dimension of the first sealing dam 6 along the radial direction of the moving ring 1 is 0.1 mm-10 mm. The first seal dam 6 serves to isolate the dynamic pressure tank 3 from the reverse pump tank 4.
In some embodiments, a second sealing dam 7 is formed between the plurality of anti-pump grooves 4 and the hydrophobic groove 5 along the radial direction of the axial end surface, the second sealing dam 7 is annular extending along the circumferential direction of the axial end surface, and the distance of the second sealing dam 7 along the radial direction of the axial end surface is 0.1 mm-1 mm.
As shown in fig. 1 and 2, the upper end surface of the moving ring 1 forms a second seal dam 7 at a space portion between the plurality of anti-pump grooves 4 and the water drain groove 5, in other words, the second seal dam 7 is located between the plurality of anti-pump grooves 4 and the water drain groove 5 in the radial direction of the moving ring 1. The second seal dam 7 is annular extending along the circumferential direction of the moving ring 1, and the dimension of the second seal dam 7 along the radial direction of the moving ring 1 is 0.1 mm-1 mm. The second sealing dam 7 serves to isolate the counter pump tank 4 from the drain tank 5.
In some embodiments, the dynamic pressure grooves 3 extend in the radial direction of the axial end face and are disposed obliquely in the circumferential direction of the axial end face, and the oblique directions of the plurality of dynamic pressure grooves 3 in the circumferential direction of the axial end face are uniform.
As shown in fig. 2, the dynamic pressure grooves 3 extend in the radial direction of the moving ring 1 and are provided obliquely in the circumferential direction of the moving ring 1, and the plurality of dynamic pressure grooves 3 are aligned in the oblique direction in the circumferential direction of the moving ring 1. Preferably, the dynamic pressure grooves 3 extend away from the center line of the moving ring 1 in the radial direction of the moving ring 1 and are provided obliquely toward the rotating direction of the moving ring 1 in the circumferential direction of the moving ring 1. In other embodiments, when the dynamic pressure grooves 3, the reverse pump grooves 4, and the water drain grooves 5 are provided at the lower end face of the stationary ring 2, the dynamic pressure grooves 3 are also provided obliquely in the circumferential direction of the moving ring 1 toward the rotating direction of the moving ring 1.
The dynamic pressure grooves 3 have a longitudinal direction and a width direction, and the size of the dynamic pressure grooves 3 in the longitudinal direction thereof is larger than the size in the width direction thereof, and preferably, the longitudinal direction of the dynamic pressure grooves 3 coincides with the oblique extension direction of the dynamic pressure grooves 3. More preferably, the dynamic pressure groove 3 has a spiral shape, an arc shape or an elliptical shape in cross section.
In some embodiments, the reverse pump groove 4 includes a reverse dynamic pressure groove 41 and an auxiliary groove 42 that are communicated, the reverse dynamic pressure groove 41 extends in the circumferential direction of the axial end face, one end of the reverse dynamic pressure groove 41 toward the center of the axial end face is provided with a plurality of auxiliary grooves 42, and the plurality of auxiliary grooves 42 are arranged at intervals in the circumferential direction of the axial end face.
As shown in fig. 2 and 3, the reverse dynamic pressure groove 41 extends in the circumferential direction of the moving ring 1 and forms a low pressure side molded line on a side toward the center line of the moving ring 1, the auxiliary groove 42 is provided on a side of the reverse dynamic pressure groove 41 toward the center line of the moving ring 1, in other words, the auxiliary groove 42 is provided on a side of the reverse dynamic pressure groove 41 having the low pressure side molded line, the auxiliary groove 42 extends in the radial direction of the moving ring 1, one, two, three or more auxiliary grooves 42 are provided on the same reverse dynamic pressure groove 41, and when the auxiliary grooves 42 are at least two, at least two auxiliary grooves 42 are arranged at intervals in the circumferential direction of the moving ring 1.
Preferably, the reverse dynamic pressure groove 41 has a spiral, arc or triangle shape in cross section, and the auxiliary groove 42 has a quadrilateral shape in cross section. The auxiliary groove 42 is more preferably rectangular, diamond-shaped or arcuate quadrilateral in cross section.
When the non-contact sealing device is used, one side, away from the center line, of the movable ring 1 and the stationary ring 2 in the radial direction is a high pressure side, and the side, facing the center line, is a low pressure side. The high-pressure generated pressure fluid, preferably lubricating oil, enters between the movable ring 1 and the stationary ring 2 from the high-pressure side and enters the dynamic pressure groove 3 first, and a part of the pressure fluid flows along the inclined extending direction of the dynamic pressure groove 3 under the shearing action of the tangential rotational speed of the relative rotation of the movable ring 1 and the stationary ring 2, so that the flow rate of the pressure fluid is continuously accumulated along the inclined extending direction of the dynamic pressure groove 3, the pressure is gradually increased, and the dynamic pressure effect is generated. The other part of the pressure fluid continues to flow towards the low pressure side under the shearing action, wherein a part of the pressure fluid enters the reverse pumping groove 4, and under the shearing action, the pressure fluid moves reversely along the molded line of the reverse dynamic pressure groove 41, namely flows from the low pressure side to the high pressure side, so that the leakage of the high pressure side to the low pressure side is reduced, but the other part of the pressure fluid still passes between two adjacent reverse pumping grooves 4 and flows to the low pressure side, and when the other part of the pressure fluid flows to the edge of the hydrophobic groove 5, the pressure fluid is stopped at the edge of the hydrophobic groove 5 due to the edge effect of the hydrophobic groove 5, cannot continue to the low pressure side and enters the hydrophobic groove 5, and is reversely pumped to the high pressure side under the negative suction effect generated by the reverse pumping groove 4. The pressure fluid between the movable ring 1 and the static ring 2 circularly flows along the radial direction, so that the pressure fluid is prevented from leaking at the low pressure side to cause the loss of the pressure fluid, the lubrication effect between the movable ring 1 and the static ring 2 is ensured, the wear resistance and the tightness of the non-contact sealing device are better under the intermittent oil supply condition, and the non-contact sealing device has higher sealing capability and reliability.
In the description of the present invention, it should be understood that the terms "first" and "second" are used solely for distinguishing between and not necessarily for indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.
Claims (10)
1. The utility model provides a non-contact sealing device, its characterized in that, includes moving ring (1) and quiet ring (2), an axial terminal surface of moving ring (1) with an axial terminal surface of quiet ring (2) sets up relatively, moving ring (1) orientation still the axial terminal surface of ring (2) with still the annular (2) orientation one of the axial terminal surface of moving ring (1) is equipped with dynamic pressure groove (3), anti-pump groove (4) and hydrophobic groove (5), dynamic pressure groove (3) are followed the circumference interval of axial terminal surface arranges a plurality of, anti-pump groove (4) are followed the circumference interval of axial terminal surface arranges a plurality of, hydrophobic groove (5) are followed the circumference of axial terminal surface extends the annular, a plurality of dynamic pressure groove (3), a plurality of anti-pump groove (4) and hydrophobic groove (5) are in the radial direction of axial terminal surface along orientation axial terminal surface the center of axial terminal surface arranges in proper order.
2. The non-contact seal device according to claim 1, wherein a first seal dam (6) is formed between the plurality of dynamic pressure grooves (3) and the plurality of counter pump grooves (4) in a radial direction of the axial end face, the first seal dam (6) is annular extending in a circumferential direction of the axial end face, and a distance of the first seal dam (6) in the radial direction of the axial end face is 0.1mm to 10mm.
3. The non-contact sealing device according to claim 1, wherein a second sealing dam (7) is formed between the plurality of counter pump grooves (4) and the water drain groove (5) in the radial direction of the axial end face, the second sealing dam (7) is ring-shaped extending in the circumferential direction of the axial end face, and the distance of the second sealing dam (7) in the radial direction of the axial end face is 0.1mm to 1mm.
4. A non-contact sealing device according to claim 1, characterized in that the groove depth of the hydrophobic groove (5) is 0.5-3 mm.
5. A non-contact sealing device according to any one of claims 1-4, wherein said dynamic pressure generating grooves (3) extend in a radial direction of said axial end face and are disposed obliquely in a circumferential direction of said axial end face, and wherein the oblique directions of a plurality of said dynamic pressure generating grooves (3) in the circumferential direction of said axial end face are uniform.
6. A non-contact sealing arrangement according to claim 5, characterized in that the dynamic pressure groove (3) has a spiral, arc or oval cross section.
7. The non-contact sealing device according to any one of claims 1 to 4, wherein the reverse pumping groove (4) includes a reverse dynamic pressure groove (41) and an auxiliary groove (42) which are communicated, the reverse dynamic pressure groove (41) extends in a circumferential direction of the axial end face, one end of the reverse dynamic pressure groove (41) toward a center of the axial end face is provided with a plurality of the auxiliary grooves (42), and a plurality of the auxiliary grooves (42) are arranged at intervals in the circumferential direction of the axial end face.
8. The non-contact sealing device according to claim 7, wherein the reverse dynamic pressure groove (41) has a spiral, arc or triangle shape in cross section;
the cross section of the auxiliary groove (42) is quadrilateral.
9. The non-contact seal of claim 8, wherein the auxiliary groove (42) is rectangular, diamond-shaped or arcuately quadrilateral in cross section.
10. The non-contact sealing device according to any one of claims 1-4, characterized in that the groove depth of the counter pump groove (4) is 2-5 μm;
The depth of the dynamic pressure groove (3) is 2-5 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311830818.1A CN117989328A (en) | 2023-12-27 | 2023-12-27 | Non-contact sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311830818.1A CN117989328A (en) | 2023-12-27 | 2023-12-27 | Non-contact sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117989328A true CN117989328A (en) | 2024-05-07 |
Family
ID=90891755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311830818.1A Pending CN117989328A (en) | 2023-12-27 | 2023-12-27 | Non-contact sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117989328A (en) |
-
2023
- 2023-12-27 CN CN202311830818.1A patent/CN117989328A/en active Pending
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