CN216789231U - Mechanical sealing device with ultra-smooth end face - Google Patents

Abstract

The embodiment of the utility model belongs to the technical field of sealing, and particularly relates to a mechanical sealing device with an ultra-smooth end face. The embodiment of the utility model is used for solving the technical problem that the additional installation of the cooling system is not beneficial to improving the working reliability of the mechanical device in the related technology. Including sealed quiet ring, sealed rotating ring and quiet ring holder, sealed quiet ring is fixed on quiet ring holder, and sealed rotating ring is including just to the rotating ring terminal surface of sealed quiet ring, and partial rotating ring terminal surface is provided with hydrophobic structure in order constituting seal end face with sealed quiet ring laminating on the rotating ring terminal surface, and hydrophobic structure is used for improving the mobility of liquid. When the sealing movable ring rotates relative to the sealing static ring, the hydrophobic structure on the sealing end face can reduce the friction force between the sealing movable ring and the sealing static ring, so that the friction and the abrasion are reduced.

Description

Mechanical sealing device with ultra-smooth end face

Technical Field

The embodiment of the utility model belongs to the technical field of sealing, and particularly relates to a mechanical sealing device for an ultra-smooth end face.

Background

The mechanical sealing device is an application and widely-used sealing structure, and the structure has good adaptability and the advantage of easy assembly and disassembly. In the starting and stopping stage of the mechanical device, the end face of the sealing device matched with the mechanical device is easy to wear, and the sealing performance of the sealing device is seriously influenced.

In the related art, a cooling system is usually added to improve the problem of severe wear of the end faces of the sealing device. However, the addition of a cooling system is disadvantageous for improving the operational reliability of the mechanical device.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a mechanical sealing device with an ultra-smooth end face, which is used for solving the technical problem that a cooling system is additionally arranged in the related technology, so that the working reliability of the mechanical device is not improved.

The embodiment of the utility model provides a mechanical sealing device with an ultra-smooth end face, which comprises: sealed quiet ring, sealed rotating ring and quiet ring holder, sealed quiet ring is fixed on the quiet ring holder, sealed rotating ring is including just right the rotating ring terminal surface of sealed quiet ring, part the rotating ring terminal surface with sealed quiet ring laminating is in order to constitute sealed terminal surface, be provided with hydrophobic structure on the rotating ring terminal surface, hydrophobic structure is used for improving the mobility of liquid.

In one possible implementation manner, the hydrophobic structure comprises a plurality of convex structures, the rolling angle formed by the liquid on the surface of the convex structures is less than 10 degrees, and the contact angle formed by the liquid is greater than 90 degrees.

In one possible implementation, the hydrophobic structure includes a hydrophobic coating, and the liquid forms a rolling angle of less than 10 ° and a contact angle of greater than 90 ° on the surface of the hydrophobic coating.

In a possible implementation manner, the movable ring end surface includes a first portion provided with the hydrophobic structure, the first portion is located on a side of the movable ring end surface away from the central axis, and a part of the first portion is located in the sealing end surface.

In a possible implementation manner, the sealing end face includes a second portion and a third portion, the second portion is provided with the hydrophobic structure, the second portion is located on a side of the sealing end face close to the central axis, the second portion is located outside the sealing end face, the third portion is provided with a planar structure, and the third portion is located between the first portion and the second portion.

In a possible implementation manner, the flow guide device further comprises a plurality of drainage grooves which are uniformly arranged along the circumferential direction of the end surface of the movable ring.

In a possible implementation manner, the sealing device further comprises a static ring pad and an elastic element, the static ring seat is provided with an installation cavity for installing the sealed static ring, the static ring pad is arranged at one end, facing the installation cavity, of the sealed static ring, one end of the elastic element abuts against the inner wall of the installation cavity, and the other end of the elastic element abuts against the static ring pad.

In a possible implementation manner, the static ring seat further comprises a first sealing element, the static ring seat comprises a first mounting groove for mounting the first sealing element, and the first sealing element is used for sealing the static ring seat and a sealing shell for mounting the static ring seat.

In a possible implementation manner, the sealing device further comprises a second sealing element, the static sealing ring comprises a second mounting groove for mounting the second sealing element, and the second sealing element is used for sealing the static sealing ring and the mounting cavity.

In one possible implementation, the sealing device further comprises a spring collar, wherein the static ring seat comprises a third installation groove for installing the spring collar, and the spring collar is located between the sealing static ring and the static ring seat.

The embodiment of the utility model provides a mechanical sealing device with an ultra-smooth end face, which comprises a static sealing ring, a dynamic sealing ring and a static ring seat, wherein the static sealing ring is fixed on the static ring seat, the dynamic sealing ring comprises a dynamic ring end face which is opposite to the static sealing ring, part of the dynamic ring end face is attached to the static sealing ring to form a sealing end face, and a hydrophobic structure is arranged on the dynamic ring end face and used for improving the liquidity of liquid. When the sealing movable ring rotates relative to the sealing static ring, the hydrophobic structure on the sealing end face can reduce the friction force between the sealing movable ring and the sealing static ring, so that the friction and the abrasion are reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a cross-sectional view of a mechanical seal with ultra-smooth end faces according to an embodiment of the present invention;

FIG. 2 is a side view of a seal rotating ring according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a seal end face and a seal stationary ring according to an embodiment of the present invention.

Description of reference numerals:

10. sealing the movable ring;

11. a drainage groove;

12. the end surface of the movable ring;

121. a first portion;

1211. a non-contact surface;

1212. a contact surface;

122. a second portion;

123. a third portion;

13. a hydrophobic structure;

20. sealing the static ring;

21. a stationary ring end face;

30. a stationary ring seat;

31. installing a cavity;

41. a stationary ring pad;

42. an elastic element;

51. a first seal member;

52. a second seal member;

53. a spring collar;

54. positioning a groove;

60. and sealing the end face.

Detailed Description

For clear understanding of the technical solutions of the present application, the solutions of the related art will be described in detail first.

The mechanical sealing device is an application and widely used sealing device, and the structure has good adaptability and the advantage of easy assembly and disassembly. In the starting and stopping stage of the mechanical device, the end face of the sealing device matched with the mechanical device is easy to wear, and the sealing performance of the sealing device is seriously influenced. In the related art, a cooling system is usually added to improve the problem of severe wear of the end faces of the sealing device. However, the addition of a cooling system is disadvantageous for improving the operational reliability of the mechanical device.

In view of this, an embodiment of the present invention provides an ultra-smooth end surface mechanical sealing device, including a static sealing ring and a dynamic sealing ring, where the dynamic sealing ring includes a dynamic ring end surface facing the static sealing ring, a part of the dynamic ring end surface is attached to the static sealing ring to form a sealing end surface, and a hydrophobic structure is disposed on the dynamic ring end surface and used to improve the fluidity of liquid. When the sealing movable ring rotates relative to the sealing static ring, the hydrophobic structure on the sealing end face can reduce the friction force between the sealing movable ring and the sealing static ring, so that the friction and the abrasion are reduced.

While various alternative implementations of the present invention will now be described with reference to the drawings, it will be understood by those skilled in the art that the following implementations are illustrative only and not exhaustive, and that certain features or certain examples may be substituted, spliced or combined by those skilled in the art based on these implementations, and are still considered to be the present disclosure.

As shown in fig. 1, an ultra-smooth end surface mechanical sealing device provided by an embodiment of the present invention includes a stationary sealing ring 20, a moving sealing ring 10, and a stationary ring seat 30.

The ultra-smooth end face mechanical sealing device provided by the embodiment of the utility model can be used for a rotating part (such as a rotating shaft) extending out of a sealing shell, and the center lines of a sealing static ring 20, a sealing dynamic ring 10 and a static ring seat 30 are coincided. The quiet ring seat 30 is used for being connected with sealed casing, and sealed quiet ring 20 is fixed on quiet ring seat 30, and sealed rotating ring 10 and sealed quiet ring 20 are sealed to be laminated, and sealed rotating ring 10 is used for being connected with the rotation piece, and when the rotation piece took place to rotate, the rotation piece drove sealed rotating ring 10 and carries out circumferential direction relative sealed quiet ring 20.

With continued reference to fig. 1 and 3, one end of the seal moving ring 10 facing the seal stationary ring 20 is a moving ring end face 12, a part of the moving ring end face 12 is used for being attached to the seal stationary ring 20, and the moving ring end face 12 attached to the seal stationary ring 20 is a seal moving ring end face; similarly, the end of the stationary seal ring 20 facing the moving seal ring 10 is a stationary ring end face 21, the stationary ring end face 21 is configured to be attached to the moving seal ring end face to jointly form a seal end face 60, and the seal end face 60 is configured to prevent liquid leakage from between the rotating shaft and the seal housing.

In this embodiment, the end surface 12 of the moving ring is provided with a hydrophobic structure 13, and the hydrophobic structure 13 is used for improving the fluidity of the liquid. It is worth to be noted that, in the process that the movable sealing ring 10 rotates relative to the stationary sealing ring 20, a small amount of liquid enters the sealing end face 60, and the hydrophobic structure 13 improves the liquidity of the liquid, which is beneficial to reducing the shearing force between the movable sealing ring 10 and the stationary sealing ring 20, thereby reducing the friction force between the liquid and the solid and reducing the abrasion of the sealing end face 60.

The embodiment of the utility model provides a mechanical sealing device with an ultra-smooth end face, which comprises a static sealing ring 20, a dynamic sealing ring 10 and a static ring seat 30, wherein the static sealing ring 20 is fixed on the static ring seat 30, the dynamic sealing ring 10 comprises a dynamic ring end face 12 which is in sealing fit with the static sealing ring 20, a hydrophobic structure 13 is arranged on the dynamic ring end face 12, and the hydrophobic structure 13 is used for improving the liquidity of liquid. When the seal moving ring 10 rotates relative to the seal static ring 20, the hydrophobic structure 13 on the moving ring end face 12 can reduce the friction force between the seal moving ring 10 and the seal static ring 20, so that the friction wear is reduced.

Furthermore, through the arrangement of the hydrophobic structure 13, impurities and friction abrasive particles in the liquid can be taken away by utilizing the liquidity of the liquid, so that the self-cleaning effect of the movable ring end face 12 is achieved, the reliability of the mechanical sealing device can be improved, and the service life of the mechanical sealing device can be prolonged.

The working principle of the hydrophobic structure 13 is briefly described below: after the wetting phenomenon reaches equilibrium, the liquid has a certain angle at the three-phase intersection, which is called as a contact angle, and when the contact angle is larger than 90 degrees, the structure shows hydrophobicity; further, when the structure has a certain inclination angle, the liquid does not necessarily move downward on the inclined surface, and as the inclination angle increases, the contact angle of the front portion of the liquid increases and the contact angle of the rear portion decreases due to gravity. When the tilt angle is increased to a critical point, i.e. the roll angle, where the structure exhibits superhydrophobicity, when the roll angle is less than 10 °, the liquid slides downwards. In this embodiment, the end face having the superhydrophobic structure may be defined as a super-slippery end face.

Optionally, the hydrophobic structure 13 may include a plurality of protruding structures, the hydrophobic structure 13 includes a plurality of protruding structures, a rolling angle formed by the liquid on the surface of the protruding structure is less than 10 °, and a contact angle formed by the liquid is greater than 90 °, that is, the protruding structure has super-hydrophobicity, and the liquid can maintain good fluidity on the surface of the protruding structure, so as to reduce the wear of the moving ring end surface 12.

In one possible implementation, the liquid may fully occupy the grooves between the raised structures, such that the actual contact area 1212 of the liquid with the hydrophobic structures 13 is much larger than the apparent geometric contact area 1212, enhancing hydrophobicity. In another possible implementation, the liquid may be suspended over the grooves between the raised structures, but may not fill the grooves, but may only contact the raised structures, thereby increasing the contact angle and increasing the hydrophobicity. It is worth mentioning that the liquid can be brought into different states by adjusting the nano-scale of the protruding structures in the hydrophobic structures 13.

Alternatively, the hydrophobic structure 13 may include a hydrophobic coating, and the liquid forms a rolling contact angle smaller than 10 ° and a contact angle larger than 90 ° on the surface of the hydrophobic coating, that is, the hydrophobic coating has super-hydrophobicity, and the liquid can maintain good fluidity on the surface of the hydrophobic coating, thereby reducing the abrasion of the sealing end face 60.

In a specific implementation mode, the material of the hydrophobic coating can comprise polycarbonate and SiO₂And silicone adhesive.

With continued reference to fig. 2, the rotating ring end surface 12 may include a first portion 121. For example, the first portion 121 may be located on a side of the moving ring end surface 12 away from the center line, the moving ring end surface 12 is an annular surface, the first portion 121 is an annular surface concentric with the moving ring end surface 12, an outer diameter of the first portion 121 is equal to an outer diameter of the moving ring end surface 12, and an inner diameter of the first portion 121 is larger than the inner diameter of the moving ring end surface 12.

As shown in fig. 3, the first portion 121 includes a contact surface 1212 and a non-contact surface 1211, and the first portion 121 may be provided with the hydrophobic structure 13. The contact surface 1212 and the non-contact surface 1211 are concentric annular surfaces, and an outer diameter of the contact surface 1212 is equal to an inner diameter of the non-contact surface 1211.

The contact surface 1212 may be located between the seal moving ring 10 and the seal stationary ring 20, that is, the contact surface 1212 may be located in the seal end surface 60; the non-contact face 1212 may be located outside of the seal face 60. Due to the fact that the hydrophobic structure 13 is arranged on the contact surface 1212, the fluid shearing force between the moving ring end surface 12 and the static sealing ring 20 can be reduced, friction loss is avoided, and friction abrasion of the moving ring end surface 12 is avoided; because the non-contact surface 1212 does not rub, and the non-contact surface 1212 is provided with the hydrophobic structure 13, the hydrophobic structure 13 can promote the liquid flow at the non-contact surface 1212, which is beneficial to the flowing liquid to take away the accumulated wear abrasive particles, and further plays a cleaning role, thereby further improving the wear state of the seal end surface 60.

With continued reference to fig. 2, the moving ring end face 12 may further include a second portion 122. For example, the second portion 122 may be located on a side of the moving ring end surface 12 close to the center line, the moving ring end surface 12 is an annular surface, the second portion 122 is an annular surface concentric with the moving ring end surface 12, an inner diameter of the second portion 122 is equal to an inner diameter of the moving ring end surface 12, and an outer diameter of the second portion 122 is smaller than the outer diameter of the moving ring end surface 12.

Further, the second portion 122 may be located outside the sealing end face 60, and the second portion 122 may be provided with the hydrophobic structure 13. Because the second portion 122 does not rub, and the second portion 122 is provided with the hydrophobic structure 13, the hydrophobic structure 13 can promote the fluid flow at the non-contact surface 1212, which is beneficial for the flowing fluid to take away the accumulated wear abrasive particles, so as to perform a cleaning function, thereby further improving the wear state of the moving ring end surface 12.

With continued reference to fig. 3, the moving ring end surface 12 may further include a third portion 123, and the third portion 123 may be located between the first portion 121 and the second portion 122. Illustratively, the third portion 123 may be an annular surface concentric with the moving ring end surface 12, and the inner diameter of the third portion 123 is larger than the inner diameter of the moving ring end surface 12, and the outer diameter of the third portion 123 is smaller than the outer diameter of the moving ring end surface 12. The hydrophobic structure 13 of the third portion 123 may be omitted, that is, the third portion 123 may be a planar structure and is located between the movable sealing ring 10 and the stationary sealing ring 20, and the third portion 123 may bear the pressure between the movable sealing ring 10 and the stationary sealing ring 20, when the liquid enters the third portion 123, the liquid in the third portion 123 has relatively poor fluidity, and the fluid film formed by the third portion 123 has relatively high rigidity, so as to achieve a sealing effect, thereby preventing the liquid from leaking from the end face 12 of the driven ring.

Optionally, the ultra-smooth end surface mechanical sealing device may further include a plurality of drainage grooves 11 uniformly arranged along the circumferential direction of the moving ring end surface 12, and the drainage grooves 11 are used for guiding the liquid to the moving ring end surface 12, so as to reduce the resistance of the liquid entering the moving ring end surface 12. Furthermore, the liquid flow of the moving ring end face 12 can be further enhanced by arranging the drainage grooves 11, and the friction and abrasion of the moving ring end face 12 are further avoided. As shown in fig. 1, the drainage grooves 11 may be rectangular grooves. Of course, in some other embodiments, the drainage groove 11 can also be a groove of other shapes, such as circular, spiral, etc.

Optionally, the ultra-smooth end face mechanical sealing device further includes a static ring gasket 41 and an elastic element 42, the static ring seat 30 has a mounting cavity 31 for mounting the static sealing ring 20, the static sealing ring 20 is connected with the static ring seat 30 through the static ring gasket 41 and the elastic element 42, and by providing the static ring gasket 41 and the elastic element 42, the sealing performance between the static sealing ring 20 and the static ring gasket 41 is improved.

For example, the mounting cavity 31 may be a substantially cylindrical space, the stationary gasket 41 may be disposed at an end of the sealing stationary ring 20 facing the mounting cavity 31, one end of the elastic element 42 may abut against an inner wall of the mounting cavity 31, and the other end may abut against the stationary gasket 41.

In a specific implementation manner, the stationary ring pad 41 may be an annular pad with a flat contact surface 1212, the stationary ring pad 41 is beneficial to ensure that the force applied to the stationary sealing ring 20 is uniform, and the material of the stationary ring pad 41 may include metal and teflon.

In a specific implementation, the elastic element 42 may be a wave spring or a coil spring, and by setting the elastic element 42, a certain pre-tightening force may be provided for the stationary seal ring 20, so as to ensure that the stationary seal ring 20 and the stationary seat 30 are tightly attached to each other, thereby further improving the sealing performance of the stationary seal ring 20. Further, a plurality of elastic elements 42 may be provided, and the plurality of elastic elements 42 are uniformly arranged in the circumferential direction of the seal stationary ring 20. The sealing static ring 20 is uniformly stressed, and the sealing performance of the sealing static ring 20 is further improved.

It should be noted that the diameter of the mounting cavity 31 may be larger than the maximum diameter of the compressed elastic element 42, so as to prevent the elastic element 42 from being collided, and further affect the sealing performance between the stationary ring seat 30 and the stationary seal ring 20.

Optionally, the ultra-smooth end face mechanical sealing device may further include a first sealing element 51, the stationary ring seat 30 may include a first mounting groove for mounting the first sealing element 51, and the first sealing element 51 is used for sealing the stationary ring 20 seat and a sealing housing for mounting the stationary ring seat 30. For example, the first mounting groove may be located at an end of the stationary ring seat 30 away from the sealing moving ring 10, and the first mounting groove may be located at an outer surface of the stationary ring seat 30 away from the centerline. The first sealing member 51 may include a sealing ring, such as an O-ring, a C-ring, a U-ring, etc., and the material may include nitrile rubber, fluorine rubber, etc. Accordingly, the shape of the first mounting groove should be designed accordingly according to the shape of the first sealing member 51.

Further, the depth of the first installation groove may be less than 4% to 18% of the diameter of the first sealing member 51, so that the first sealing member 51 is in a compressed state after being installed in the first installation groove, thereby preventing liquid from leaking between the stationary ring seat 30 and a sealing housing for installing the stationary ring seat 30, and thus performing a sealing function.

Optionally, the ultra-smooth end face mechanical sealing device may further include a second sealing element 52, the stationary seal ring 20 may include a second mounting groove for mounting the second sealing element 52, and the second sealing element 52 is used for sealing the mounting cavity 31 and the stationary seal ring 20. For example, the second mounting groove may be located at an end of the stationary seal ring 20 away from the movable seal ring 10, and the second mounting groove may be opposite to a sidewall of the mounting cavity 31 near the center line. The second sealing member 52 may include a sealing ring, such as an O-ring, a C-ring, a U-ring, etc., and the material may include nitrile rubber, fluorine rubber, etc. Accordingly, the shape of the second mounting groove should be designed accordingly according to the shape of the first sealing member 51.

Further, the depth of the second installation groove may be less than 4% to 18% of the diameter of the second sealing member 52, so that the second sealing member 52 is in a compressed state after being installed in the second installation groove, and further, the liquid is prevented from leaking between the stationary ring seat 30 and the stationary sealing ring 20, thereby performing a sealing function.

Optionally, the ultra-smooth end face mechanical sealing device may further include a spring collar 53, and the stationary ring seat 30 may include a third mounting groove for mounting the spring collar 53, the spring collar 53 being located between the sealing stationary ring 20 and the stationary ring seat 30. For example, the third mounting groove may be located on a side wall of the mounting cavity 31 of the stationary ring seat 30 away from the center line, and the third mounting groove may be opposite to an end of the stationary seal ring 20 close to the movable seal ring 10. The spring collar 53 is used to axially position the stationary seal ring 20 and prevent movement of the stationary seal ring 20.

Optionally, the mechanical sealing device with ultra-smooth end face may further include a positioning groove 54, the positioning groove 54 is located at an end of the stationary ring seat 30 away from the seal rotating ring 10, the positioning groove 54 is used for installing an anti-rotation pin, and the anti-rotation pin is connected with the stationary ring seat 30 and the seal housing, so as to prevent the stationary ring seat 30 from moving relative to the seal housing. For example, the positioning groove 54 may be provided in plural, and the positioning groove 54 may be a rectangular groove, which is beneficial to further improving the positioning effect of the stationary ring seat 30.

In the description of the embodiments of the present invention, it should be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the embodiments of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixed or detachably connected, or integrated; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means 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 utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. An ultra-smooth end face mechanical seal, comprising: sealed quiet ring, sealed rotating ring and quiet ring holder, sealed quiet ring is fixed on the quiet ring holder, sealed rotating ring is including just right the rotating ring terminal surface of sealed quiet ring, part the rotating ring terminal surface with sealed quiet ring laminating is in order to constitute sealed terminal surface, be provided with hydrophobic structure on the rotating ring terminal surface, hydrophobic structure is used for improving the mobility of liquid.

2. The ultra-smooth end face mechanical seal device according to claim 1, wherein the hydrophobic structure comprises a plurality of convex structures, the liquid forms a rolling angle of less than 10 ° on the surface of the convex structures, and forms a contact angle of more than 90 °.

3. The ultra-smooth end-face mechanical seal device of claim 1, wherein the hydrophobic structure comprises a hydrophobic coating, and the liquid forms a rolling angle of less than 10 ° and a contact angle of more than 90 ° on the surface of the hydrophobic coating.

4. The ultra-smooth end face mechanical seal device according to claim 2 or 3, wherein the movable ring end face comprises a first portion provided with the hydrophobic structure, the first portion is located on a side of the movable ring end face away from a central axis, and a part of the first portion is located in the seal end face.

5. The ultra-smooth end face mechanical seal device according to claim 4, wherein the moving ring end face comprises a second portion and a third portion, the second portion is provided with the hydrophobic structure, the second portion is located on one side of the moving ring end face close to the central axis, the second portion is located outside the seal end face, and the third portion is located between the first portion and the second portion.

6. The ultra-smooth end face mechanical seal device according to claim 1, further comprising a plurality of drainage grooves uniformly arranged along the circumferential direction of the end face of the rotating ring.

7. The ultra-smooth end face mechanical sealing device according to claim 1, further comprising a static ring pad and an elastic element, wherein the static ring seat has a mounting cavity for mounting the static sealing ring, the static ring pad is disposed at one end of the static sealing ring facing the mounting cavity, one end of the elastic element abuts against an inner wall of the mounting cavity, and the other end abuts against the static ring pad.

8. The ultra-smooth end face mechanical seal of claim 7 further comprising a first seal, said stationary ring seat including a first mounting groove for mounting said first seal, said first seal for sealing said stationary ring seat and a seal housing for mounting said stationary ring seat.

9. The ultra-smooth end face mechanical seal of claim 7 further comprising a second seal, said static seal ring including a second mounting groove for mounting said second seal, said second seal for sealing said static seal ring with said mounting cavity.

10. The ultra-smooth end face mechanical seal of claim 7 further comprising a spring collar, said stationary ring seat including a third mounting groove for mounting said spring collar, said spring collar being located between said seal stationary ring and said stationary ring seat.

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