CN113154044A - Double-end-face large-shaft-diameter compact mechanical seal - Google Patents
Double-end-face large-shaft-diameter compact mechanical seal Download PDFInfo
- Publication number
- CN113154044A CN113154044A CN202110429077.0A CN202110429077A CN113154044A CN 113154044 A CN113154044 A CN 113154044A CN 202110429077 A CN202110429077 A CN 202110429077A CN 113154044 A CN113154044 A CN 113154044A
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- Prior art keywords
- hole
- face
- ring
- outer tube
- double
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- 238000007789 sealing Methods 0.000 claims abstract description 15
- 230000003068 static effect Effects 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 8
- 238000010030 laminating Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005086 pumping Methods 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3404—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal
- F16J15/3408—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface
- F16J15/3424—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface with microcavities
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3464—Mounting of the seal
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Sealing (AREA)
Abstract
The invention provides a double-end-face large-shaft-diameter compact mechanical seal which comprises a shell assembly and a rotor assembly, wherein the shell assembly is provided with a mounting hole, the rotor assembly comprises an outer tube and a rotating ring, the outer tube is mounted in the mounting hole, two stationary ring seats are arranged between the shell assembly and the outer tube, the two stationary ring seats are respectively positioned at the left side and the right side of the rotating ring, a stationary ring is fixedly mounted on the stationary ring seat, and the end face of the rotating ring is in sealing connection with the end face of the stationary ring; the casing closes and is equipped with the casing interface on the piece, be equipped with in the outer tube with the outer tube interface that the casing interface is linked together, through the sealed mode that sets up quiet ring at rotating ring both sides terminal surface, when the rotating ring is rotatory, go back the high pressure side medium reversal and form zero leakage, the pressure increase of liquid film simultaneously and separately reduce the resistance to two sealed terminal surfaces, this kind of structure rotational speed is higher, and the pumping effect is better more to can keep low leakage state.
Description
Technical Field
The invention relates to the field of hydraulic element manufacturing, in particular to a double-end-face-to-face large-shaft-diameter compact mechanical seal.
Background
The mechanical seal is a device for preventing fluid leakage, which is formed by at least one pair of end faces perpendicular to the rotation axis, and the end faces are kept in fit and relatively slide under the action of fluid pressure and the elasticity of a compensation mechanism and the cooperation of an auxiliary seal. In the prior art, the contact type seal is difficult to be qualified in the sealing working condition of high speed, high pressure and high temperature due to the friction of the section and the like, and after the contact type seal works for a long time, medium leakage is easy to occur due to the reasons of abrasion, aging and the like, so that the pollution of the external environment is caused.
Disclosure of Invention
The invention provides a double-end-face-to-face large-shaft-diameter compact mechanical seal to solve the technical problem that a contact type seal is difficult to be qualified in high-speed, high-pressure and high-temperature sealing conditions due to friction of a section and the like.
The technical scheme adopted by the invention for solving the technical problems is as follows: a double-end-face large-shaft-diameter compact mechanical seal comprises a shell assembly and a rotor assembly, wherein a mounting hole is formed in the shell assembly along the axial direction, the rotor assembly comprises an outer pipe and a rotating ring fixedly sleeved on the outer wall of the outer pipe, the outer pipe is mounted in the mounting hole, two stationary ring seats are arranged between the shell assembly and the outer pipe, the two stationary ring seats are respectively positioned on the left side and the right side of the rotating ring, a stationary ring is fixedly mounted on one side, close to the rotating ring, of each stationary ring seat, and the end face of each rotating ring is connected with the end face of each stationary ring in a sealing mode; the shell assembly is provided with a shell connector, and the outer tube is provided with an outer tube connector communicated with the shell connector.
Further: all be provided with the helicla flute on the left end face of rotating ring and the right-hand member face, the groove top width of helicla flute is greater than the tank bottom width, the fluting direction that the helicla flute groove top reached the tank bottom with the direction of rotation of outer tube is unanimous, the quantity of helicla flute is a plurality of, a plurality of the helicla flute is along the even setting of circumference.
Further: a groove is formed in the hole wall of the mounting hole along the circumferential direction, the static ring seat is movably mounted in the mounting hole and is arranged in a sealing mode with the hole wall of the mounting hole, a mounting flange is arranged at one end, close to the rotating ring, of the static ring seat, and the mounting flange extends into the groove; the casing closes the piece with all be provided with the spring hole of placing the spring in the mounting flange, the deformation power of spring can push away quiet ring seat court the rotating ring removes, and makes the terminal surface laminating of quiet ring is in on the terminal surface of rotating ring, be provided with between mounting flange and the casing closes and avoid both relative pivoted rotation stopping mechanism.
Further: the side wall of the movable ring is provided with a medium channel, and the shell interface is connected with the outer pipe interface through the medium channel.
Further: the rotation stopping mechanism comprises an elastic cylindrical pin, a first pin hole and a second pin hole, the first pin hole and the second pin hole are axially arranged, the first pin hole is formed in the mounting flange, the second pin hole is formed in the shell assembly, and the elastic cylindrical pin is inserted into the first pin hole and the second pin hole.
Further: the outer wall of the outer pipe is provided with a first threaded hole, the side wall of the movable ring is provided with a second threaded hole, and the movable ring is screwed in the first threaded hole and the second threaded hole through a first set screw and is fixedly installed on the outer pipe.
Further: the last axial of edge of mounting flange is provided with the through-hole, be equipped with in the casing closes the piece with the third screw hole that the through-hole collineation set up crosses through half tooth bolt the through-hole to screw in the third screw hole can with the quiet ring seat is installed on the casing closes the piece.
Further: the shell assembly is formed by fixedly connecting a first shell and a second shell through a second set screw.
Further: and a top thread hole is formed in the first shell.
The double-end-face large-shaft-diameter compact mechanical seal has the advantages that the double-end-face large-shaft-diameter compact mechanical seal has the characteristics of low leakage, low torque and long service life by the sealing mode that the static rings are arranged on the end faces of the two sides of the movable ring, when the movable ring rotates, the spiral groove reversely pushes back a medium on the high-pressure side to form zero leakage under the action of an upstream pumping effect, and simultaneously reduces friction resistance. The higher the rotating speed of the structure is, the better the pumping effect is, and the low leakage state can be maintained.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural view of a double-end-to-face large shaft diameter compact mechanical seal of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIGS. 3 and 4 are schematic structural views of a spiral groove on the rotating ring;
FIG. 5 is a cross-sectional view D-D of FIG. 1;
fig. 6 is a cross-sectional view of B-B in fig. 1.
In the figure, 1, a shell assembly, 3, an outer tube, 4, a moving ring, 5, a static ring seat, 6, a static ring, 7, a shell interface, 8, an outer tube interface, 9, a spiral groove, 10, a groove, 11, a mounting flange, 12, a spring, 13, a medium channel, 14, an elastic cylindrical pin, 15, a first set screw, 16, a through hole, 17, a third threaded hole, 18, a half-tooth bolt, 19, a first shell, 20, a second shell, 21, a second set screw, 22 and a jackscrew hole are arranged.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
As shown in fig. 1 and 2, the invention provides a double-end-surface-to-surface large-shaft-diameter compact mechanical seal, which comprises a housing assembly 1 and a rotor assembly, wherein a mounting hole is formed in the housing assembly 1 along an axial direction, the rotor assembly comprises an outer tube 3 and a movable ring 4 fixedly sleeved on the outer wall of the outer tube 3, the outer tube 3 is mounted in the mounting hole, two stationary ring seats 5 are arranged between the housing assembly 1 and the outer tube 3, the two stationary ring seats 5 are respectively positioned at the left side and the right side of the movable ring 4, a stationary ring 6 is fixedly mounted on one side of the stationary ring seat 5, which is close to the movable ring 4, and the end surface of the movable ring 4 is connected with the end surface of the stationary ring 6 in a sealing manner; the shell assembly 1 is provided with a shell connector 7, and the outer tube 3 is provided with an outer tube connector 8 communicated with the shell connector 7.
During the use, the rotor closes the piece and rotates together with user's pivot, and casing closes piece 1 and user machine floodgate cooperation carries out the transmission of medium through casing interface 7 and outer tube interface 8, and this kind is through setting up the sealed mode of quiet ring 6 at rotating ring 4 both sides terminal surface, has the characteristics of low leakage, low moment of torsion, high life. The highest using pressure of the scheme is 0.5 MPa; the maximum rotation speed is 1000 RPM; the maximum temperature was 150 ℃.
Referring to fig. 3 and 4, the left end face and the right end face of the movable ring 4 are provided with spiral grooves 9, the width of the top of each spiral groove 9 is larger than that of the bottom of each spiral groove, the grooving direction from the top of each spiral groove 9 to the bottom of each spiral groove is consistent with the rotation direction of the outer tube 3, the number of the spiral grooves 9 is a plurality, and the spiral grooves 9 are uniformly arranged along the circumferential direction.
Because the two surfaces of the movable ring 4 are both provided with the spiral grooves 9, one surface is clockwise, the other surface is anticlockwise, when the sealing device works, the rotating direction of a rotating shaft of a user is the same as the grooving direction of the spiral grooves 9, the groove depth of the spiral grooves 9 is 6-10 micrometers, when the movable ring 4 rotates, the spiral grooves 9 reversely push back the medium on the high-pressure side to form zero leakage under the action of an upstream pumping effect, and simultaneously reduce friction resistance, specifically, liquid is pumped between the sealing end surfaces of the movable ring 4 and the static ring 6, a layer of liquid film with extremely thin thickness is generated, the pressure of the liquid film is increased, the two sealing end surfaces are separated, the sealed medium leaked from the high-pressure side to the low-pressure side is reversely conveyed to the high-pressure side by the spiral grooves 9, and the leakage of the sealed medium from the high-pressure side to the low-pressure side is eliminated. The higher the rotating speed of the structure is, the better the pumping effect is, and the low leakage state can be maintained.
Referring to fig. 5 and 6, a groove 10 is circumferentially formed in a hole wall of the mounting hole, the stationary ring seat 5 is movably mounted in the mounting hole and is arranged in a sealing manner with the hole wall of the mounting hole, a mounting flange 11 is arranged at one end, close to the moving ring 4, of the stationary ring seat 5, and the mounting flange 11 extends into the groove 10; the casing closes 1 with all be provided with the spring hole of placing spring 12 in the mounting flange 11, the deformation power of spring 12 can push away quiet ring holder 5 court 4 removal of rotating ring, and make the terminal surface laminating of quiet ring 6 is in on the terminal surface of rotating ring 4, mounting flange 11 closes 1 with the casing and is provided with between them and avoids both relative pivoted detent mechanisms. The spring 12 pushes the static ring seat 5, so that the static ring 6 generates sealing positive pressure on the dynamic ring 4, and medium leakage is avoided when the static ring 6 and the dynamic ring 4 are relatively static. The rotation stopping mechanism can prevent the static ring seat 5 and the shell assembly 1 from rotating relatively.
The side wall of the movable ring 4 is provided with a medium channel 13, and the shell connector 7 is connected with the outer tube connector 8 through the medium channel 13. The housing port 7 and the outer tube port 8 can be connected through a medium channel 13, so that the medium can be circulated conveniently.
The rotation stopping mechanism comprises an elastic cylindrical pin 14, and a first pin hole and a second pin hole which are axially arranged, wherein the first pin hole is formed in the mounting flange 11, the second pin hole is formed in the shell assembly 1, and the elastic cylindrical pin 14 is inserted into the first pin hole and the second pin hole. In the rotation process of the rotating ring 4, the static ring seat 5 can be prevented from rotating along with the rotating ring 4 by inserting the elastic cylindrical pin 14 into the first pin hole and the second pin hole, the rotation stopping mode is simple in structure and convenient to install, and the moving freedom degree of the static ring seat 5 in the axial direction can be guaranteed.
The outer wall of the outer tube 3 is provided with a first threaded hole, the side wall of the movable ring 4 is provided with a second threaded hole, and the movable ring 4 is screwed in the first threaded hole and the second threaded hole through a first set screw 15 and is fixedly installed on the outer tube 3. The axial positions of the outer tube 3 and the movable ring 4 are limited through the first set screw 15, the outer tube 3 and the movable ring 4 are fixed with each other to form a whole, and meanwhile, the transmission function is provided.
The last through-hole 16 that is provided with of edge axial of mounting flange 11, be equipped with in the casing closes piece 1 with the third screw hole 17 of 16 collineation settings of through-hole, pass through half tooth bolt 18 through-hole 16, and screw in can with in the third screw hole 17 the stationary ring seat 5 is installed on the casing closes piece 1. Because the deformation force of the spring 12 can increase the assembly difficulty during assembly, the spring 12 is precompressed to a proper degree by arranging the through hole 16 and the third threaded hole 17 and connecting through the half-thread bolt 18, the deformation force of the spring 12 is prevented from influencing the assembly, and meanwhile, the axial movement amount of the stationary ring seat 5 cannot be influenced.
The housing assembly 1 is composed of a first housing 19 and a second housing 20 which are fixedly connected through a second set screw 21. The first housing 19 is provided with a jackscrew hole 22. The split type shell assembly 1 structure can reduce the processing difficulty and the manufacturing cost compared with the whole structure, and meanwhile, the rotor assembly is convenient to install. The jackscrew hole 22 is provided for easy removal and maintenance by the user.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific 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, a schematic representation of the term does not necessarily 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.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (9)
1. A double-end-face large-shaft-diameter compact mechanical seal is characterized in that: the rotor sealing device comprises a shell assembly (1) and a rotor assembly, wherein a mounting hole is formed in the shell assembly (1) along the axial direction, the rotor assembly comprises an outer tube (3) and a movable ring (4) fixedly sleeved on the outer wall of the outer tube (3), the outer tube (3) is installed in the mounting hole, a stationary ring seat (5) is arranged between the shell assembly (1) and the outer tube (3), the number of the stationary ring seats (5) is two, the two stationary ring seats (5) are respectively positioned on the left side and the right side of the movable ring (4), a stationary ring (6) is fixedly installed on one side, close to the movable ring (4), of the stationary ring seat (5), and the end face of the movable ring (4) is in sealing connection with the end face of the stationary ring (6); the shell connector (7) is arranged on the shell assembly (1), and an outer tube connector (8) communicated with the shell connector (7) is arranged in the outer tube (3).
2. The double-ended face-to-face large shaft diameter compact mechanical seal of claim 1, wherein: all be provided with helicla flute (9) on the left end face of rotating ring (4) and the right-hand member face, the groove top width of helicla flute (9) is greater than the tank bottom width, the fluting direction of helicla flute (9) groove top to the tank bottom with the direction of rotation of outer tube (3) is unanimous, the quantity of helicla flute (9) is a plurality of, a plurality of helicla flute (9) is evenly set up along circumference.
3. The double-ended face-to-face large shaft diameter compact mechanical seal of claim 1, wherein: a groove (10) is formed in the hole wall of the mounting hole along the circumferential direction, the static ring seat (5) is movably mounted in the mounting hole and is arranged in a sealing mode with the hole wall of the mounting hole, a mounting flange (11) is arranged at one end, close to the movable ring (4), of the static ring seat (5), and the mounting flange (11) extends into the groove (10); the casing closes piece (1) with all be provided with the spring hole of placing spring (12) in mounting flange (11), the deformation power of spring (12) can push away quiet ring holder (5) court rotating ring (4) remove, and make the terminal surface laminating of quiet ring (6) is in on the terminal surface of rotating ring (4), be provided with between mounting flange (11) and the casing closes piece (1) and avoid both relative pivoted detent mechanisms.
4. The double-ended face-to-face large shaft diameter compact mechanical seal of claim 1, wherein: the side wall of the movable ring (4) is provided with a medium channel (13), and the shell interface (7) is connected with the outer pipe interface (8) through the medium channel (13).
5. A double-ended face-to-face large shaft diameter compact mechanical seal as defined in claim 3 wherein: the rotation stopping mechanism comprises an elastic cylindrical pin (14), a first pin hole and a second pin hole, the first pin hole and the second pin hole are axially arranged, the first pin hole is formed in the mounting flange (11), the second pin hole is formed in the shell assembly (1), and the elastic cylindrical pin (14) penetrates through the first pin hole and the second pin hole.
6. The double-ended face-to-face large shaft diameter compact mechanical seal of claim 1, wherein: the outer wall of the outer pipe (3) is provided with a first threaded hole, the side wall of the movable ring (4) is provided with a second threaded hole, and the movable ring (4) is screwed in the first threaded hole and the second threaded hole through a first set screw (15) and is fixedly installed on the outer pipe (3).
7. A double-ended face-to-face large shaft diameter compact mechanical seal as defined in claim 3 wherein: be provided with through-hole (16) along the axial on mounting flange (11), be equipped with in casing closes piece (1) with third screw hole (17) that through-hole (16) collineation set up, cross through half tooth bolt (18) through-hole (16), and screw in can in third screw hole (17) install stationary ring seat (5) on casing closes piece (1).
8. The double-ended face-to-face large shaft diameter compact mechanical seal of claim 1, wherein: the shell assembly (1) is formed by fixedly connecting a first shell (19) and a second shell (20) through a second set screw (21).
9. The double-ended face-to-face large shaft diameter compact mechanical seal of claim 8, wherein: the first shell (19) is provided with a jackscrew hole (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110429077.0A CN113154044A (en) | 2021-04-21 | 2021-04-21 | Double-end-face large-shaft-diameter compact mechanical seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110429077.0A CN113154044A (en) | 2021-04-21 | 2021-04-21 | Double-end-face large-shaft-diameter compact mechanical seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113154044A true CN113154044A (en) | 2021-07-23 |
Family
ID=76868101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110429077.0A Pending CN113154044A (en) | 2021-04-21 | 2021-04-21 | Double-end-face large-shaft-diameter compact mechanical seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113154044A (en) |
-
2021
- 2021-04-21 CN CN202110429077.0A patent/CN113154044A/en active Pending
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