CN212803713U - Dry gas sealing device convenient to assemble for pump - Google Patents
Dry gas sealing device convenient to assemble for pump Download PDFInfo
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- CN212803713U CN212803713U CN202020343627.8U CN202020343627U CN212803713U CN 212803713 U CN212803713 U CN 212803713U CN 202020343627 U CN202020343627 U CN 202020343627U CN 212803713 U CN212803713 U CN 212803713U
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- ring
- side static
- shaft sleeve
- static ring
- medium
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Abstract
The utility model relates to a dry gas sealing device for a pump, which is convenient to assemble and comprises a cavity body positioned at a medium side, an end cover positioned at an atmosphere side, a medium side static ring, an atmosphere side static ring, a movable ring and a shaft sleeve; the cavity is connected with an end cover, the medium side static ring is arranged in the cavity, the atmosphere side static ring is arranged in the end cover, and the movable ring is arranged on the shaft sleeve and rotates along with the shaft sleeve; the movable ring is positioned between the medium side static ring and the atmosphere side static ring, the outer diameter parts of two end faces of the movable ring are carved with micrometer-scale hydrodynamic grooves, the outer diameter parts of the medium side static ring and the atmosphere side static ring are provided with step structures, two ends of the movable ring respectively form friction pairs with the medium side static ring and the atmosphere side static ring, and by sharing the movable ring, the sealing installation space is greatly reduced, the assembly is convenient, the sealing structure is improved, and the sealing service life is prolonged.
Description
Technical Field
The utility model belongs to the technical field of mechanical seal, concretely relates to dry gas sealing device for pump convenient to assembly.
Background
In the petrochemical industry, the sealed cavity of a centrifugal pump of a plurality of production devices is narrow, and particularly under the working conditions of easy volatilization and small amount of solid particle media, the operation period is short, the service life is short and the safety cannot be guaranteed by adopting common wet sealing. The dry gas seal structure for pump that current, like the pump that patent CN201269213Y disclosed, because the quiet ring does not have axial stop device, the assembly process is very troublesome, installs carelessly and easily causes the damage of spare part.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a dry gas sealing device for pump convenient to assembly for solve above-mentioned problem exactly.
The purpose of the utility model is realized through the following technical scheme:
a dry gas sealing device for a pump convenient to assemble comprises a cavity body positioned on a medium side, an end cover positioned on an atmosphere side, a medium side static ring, an atmosphere side static ring, a movable ring and a shaft sleeve, wherein the medium side static ring is positioned on the medium side;
the cavity is connected with an end cover, the medium side static ring is arranged in the cavity, the atmosphere side static ring is arranged in the end cover, and the movable ring is arranged on the shaft sleeve and rotates along with the shaft sleeve;
the dynamic ring is positioned between the medium side static ring and the atmosphere side static ring, the outer diameter parts of two end faces of the dynamic ring are carved with micrometer-scale hydrodynamic grooves, the outer diameter parts of the medium side static ring and the atmosphere side static ring are provided with step structures, two ends of the dynamic ring respectively form friction pairs with the medium side static ring and the atmosphere side static ring, and a sealing installation space is greatly reduced and the assembly is convenient by sharing the dynamic ring.
When the sealing device is used, high-pressure sealing gas (about 0.2MPa higher than the medium pressure) is introduced between a process medium and the atmosphere, enters a medium cavity through the sealing end face of the main seal and enters the atmosphere through the sealing end face of the auxiliary seal, and the sealing device does not contact with the atmosphere and is not abraded during sealing operation. Using inert gases, e.g. N2Compatibility with the medium is generally better than with the blocking liquid, which does not contaminate the medium and affect product quality as does the blocking liquid.
Furthermore, the medium side static ring is arranged in the cavity through an O-shaped ring and a spring, and the spring acts on the back of the medium side static ring to ensure that the medium side static ring is attached to the movable ring.
Furthermore, the static ring on the atmosphere side is installed in the end cover through an O-shaped ring and a spring, and the spring acts on the back face of the static ring on the atmosphere side to enable the static ring on the atmosphere side to be attached to the other end face of the movable ring.
Furthermore, the quiet ring of medium side still is equipped with quiet ring anti-rotating pin, and quiet ring anti-rotating pin plays and prevents quiet ring pivoted effect, and likewise, the quiet ring of atmosphere side is equipped with quiet ring anti-rotating pin, and quiet ring anti-rotating pin plays and prevents quiet ring pivoted effect.
Furthermore, a groove is formed in the cavity, and a snap ring used for limiting the axial position of the medium side static ring is arranged in the groove, so that the medium side static part is integrally preassembled; similarly, a groove is formed in the end cover, and a snap ring used for limiting the axial position of the atmosphere side static ring is arranged in the groove, so that the atmosphere side static part is integrally preassembled.
Furthermore, the static ring on the atmosphere side and the static ring on the medium side both adopt an L-shaped structure, and a boss is radially arranged outside the outer diameter of the sealing end face, so that the static ring assembly is convenient to preassemble.
Furthermore, the two ends of the shaft sleeve are low, the middle of the shaft sleeve protrudes outwards, and the movable ring is arranged on the protrusion of the shaft sleeve, so that the radial support and centering performance of the rotating assembly is improved, and meanwhile, the whole integrated seal is convenient to install on the main shaft of the equipment.
The device greatly reduces the sealing installation space except for the form of sharing the movable ring, the middle of the shaft sleeve is raised, the two ends of the shaft sleeve are low, and the movable ring is installed at the highest point of the shaft sleeve, so that the radial support and the centering performance of the rotating assembly are improved, and meanwhile, the whole integrated seal is convenient to install on a main shaft of the equipment.
Furthermore, the rotating ring is installed on the shaft sleeve through a clamping ring and an O-shaped ring, the rotating ring is provided with an anti-rotation pin for preventing the rotating ring from rotating, and the anti-rotation pin is installed in the pin hole.
Furthermore, one end of the shaft sleeve on the medium side is fixedly provided with a pumping ring through a clamping ring, and the pumping ring is prevented from rotating through an anti-rotation pin, so that the pumping ring and the shaft sleeve are kept still relatively all the time.
Furthermore, the shaft sleeve is fixed on the main shaft through the driving ring and the jackscrew, a positioning sheet is arranged outside the shaft sleeve, one end of the positioning sheet is connected with the end cover through a hexagon socket head cap screw, and the other end of the positioning sheet is connected with the driving ring through a hexagon socket head cap screw, so that the integral packaging of the sealing component is completed. The device is installed on equipment through stud, hexagon nut, and after the installation, tear open spacer, hexagon socket head cap screw can.
Compared with the prior art, the utility model has the characteristics of it is following:
1. the static ring adopts an L-shaped structure, and a boss is radially added outside the outer diameter of the sealing end face of the static ring, so that the static ring assembly is convenient to preassemble.
2. The sealing installation space is greatly reduced in the form of sharing the movable ring, in addition, the middle of the shaft sleeve is raised, the two ends of the shaft sleeve are low, and the movable ring is installed at the highest point of the shaft sleeve, so that the radial support and centering performance of the rotating assembly can be improved, and meanwhile, the whole integrated seal can be conveniently installed on the main shaft of the equipment.
3. Open on the cavity and have the snap ring recess, the snap ring is installed in the snap ring groove, and the axial position of the quiet ring of restriction medium side simultaneously, accomplishes the quiet subassembly of medium side and preassembles alone, and in the same way, it has the snap ring recess to open on the end cover, and the snap ring is installed in the snap ring groove, and the position of the quiet ring of restriction atmosphere side simultaneously, accomplishes the quiet subassembly of atmosphere side and preassembles alone, and this kind of structure is very convenient for prior art.
4. At the front end of the mechanical seal, a reverse pumping ring rotating together with the shaft is arranged, and the reverse pumping ring has the function of pumping solid particles contained in a surrounding medium near the inner side seal from right to left through a spiral reverse pumping effect, so that an ideal working environment of the inner side seal is ensured, and the service life of the seal is prolonged.
Drawings
Fig. 1 is a schematic diagram of an arrangement structure of the device in practical use;
in the figure: 1-O-shaped ring, 2-atmosphere-side static ring, 3-spring, 4-dynamic ring, 5-medium-side static ring, 6-spring, 7-O-shaped ring, 8-cavity, 9-gasket, 10-snap ring, 11-pump-effect ring, 12-shaft sleeve, 13-snap ring, 14-snap ring, 15-O-shaped ring, 16-O-shaped ring, 17-O-shaped ring, 18-end cover, 19-driving ring, 20-jackscrew, 21-hexagon socket screw, 22-hexagon socket screw, 23-hexagon socket screw, 24-positioning piece, 25-stud and 26-hexagon nut.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Examples
Referring to fig. 1, a dry gas sealing device for a pump, which is convenient to assemble, comprises a cavity 8 on the medium side, an end cover 18 on the atmosphere side, a medium side static ring 5, an atmosphere side static ring 2, a movable ring 4 and a shaft sleeve 12; the cavity 8 is connected with the end cover 18 through an inner hexagon screw 21, the medium side static ring 5 is arranged in the cavity 8, the atmosphere side static ring 2 is arranged in the end cover 18, and the movable ring 4 is arranged on the shaft sleeve 12 and rotates along with the shaft sleeve 12; the rotating ring 4 is located between the medium side static ring 5 and the atmosphere side static ring 2, the outer diameter of the two end faces of the rotating ring 4 is carved with a hydrodynamic groove with micron magnitude, the outer diameter of the medium side static ring 5 and the outer diameter of the atmosphere side static ring 2 are provided with step structures for axial limitation, the two ends of the rotating ring 4 form friction pairs with the medium side static ring 5 and the atmosphere side static ring 2 respectively, and through sharing the form of the rotating ring, the sealing installation space is greatly reduced, and the assembly is convenient.
When the sealing device is used specifically, the sealing gas with higher pressure introduced between the process medium and the atmosphere is higher than the medium pressure by about 0.2MPa, enters the medium cavity through the sealing end face of the main seal and enters the atmosphere through the sealing end face of the auxiliary seal, no contact or abrasion exists during sealing operation, and inert gas such as N is adopted2Compatibility with the medium is generally better than with the blocking liquid, which does not contaminate the medium and affect product quality as does the blocking liquid.
According to a further technical scheme, the atmosphere side static ring 2 and the medium side static ring 5 are symmetrically arranged on two sides of the movable ring 4, the atmosphere side static ring 2 and the medium side static ring 5 are both of an L-shaped structure, and a boss is radially arranged outside the outer diameter of the sealing end face, so that the static ring assembly is convenient to preassemble.
The two ends of the shaft sleeve 12 are low, the middle part is convex outwards, and the movable ring is arranged on the convex part of the shaft sleeve. This helps to improve the radial support and centering of the rotating assembly, while facilitating the installation of the entire cartridge seal on the main shaft of the device. The middle of the shaft sleeve is convex, the two ends of the shaft sleeve are low, and the movable ring is arranged at the highest point of the shaft sleeve, so that the radial support and centering performance of the rotating assembly can be improved, and meanwhile, the whole integrated seal can be conveniently arranged on the main shaft of the equipment.
The medium side static ring 5 is installed in the cavity 8 through an O-shaped ring 7 and a spring 6, and the spring 6 acts on the back of the medium side static ring 5 to ensure that the medium side static ring 5 is kept jointed with the movable ring 4. The static ring 2 on the atmosphere side is installed in the end cover 18 through the O-shaped ring 1 and the spring 3, and the spring 3 acts on the back of the static ring 2 on the atmosphere side to ensure that the static ring 2 on the atmosphere side is kept jointed with the other end face of the movable ring 4. The static ring 5 of medium side still is equipped with the quiet ring spacer pin, and quiet ring spacer pin plays and prevents 5 pivoted effects of quiet ring, and the quiet ring 2 of atmosphere side is equipped with the quiet ring spacer pin, and quiet ring spacer pin plays and prevents 2 pivoted effects of quiet ring. A groove is formed in the cavity 8, and a snap ring 13 for limiting the axial position of the medium side static ring 5 is arranged in the groove, so that the medium side static part is integrally preassembled; the end cover 18 is provided with a groove, and the groove is provided with a snap ring 13 for limiting the axial position of the atmosphere side stationary ring 2, so that the atmosphere side stationary part is integrally preassembled.
The rotating ring 4 is arranged on the shaft sleeve 12 through a snap ring 14 and an O-shaped ring 15, the rotating ring 4 is provided with an anti-rotation pin for preventing the rotating ring 4 from rotating, and the anti-rotation pin is arranged in the pin hole. An O-shaped ring 17 is arranged between the cavity 8 and the end cover 18, an O-shaped ring 16 is arranged between the shaft sleeve 12 and the main shaft, and a gasket 9 is arranged at the end part of the cavity 8.
One end of the shaft sleeve 12 on the medium side is fixedly provided with a pumping ring 11 through a clamping ring 10, and the pumping ring 11 is prevented from rotating through an anti-rotation pin, so that the pumping ring 11 and the shaft sleeve 12 are kept still relatively all the time. At the front end of the mechanical seal, a reverse pumping ring rotating together with the shaft is arranged, and the reverse pumping ring has the function of pumping solid particles contained in a surrounding medium near the inner side seal from right to left through a spiral reverse pumping effect, so that an ideal working environment of the inner side seal is ensured, and the service life of the seal is prolonged.
The shaft sleeve 12 is fixed on the main shaft through a driving ring 19 and a jackscrew 20, a positioning sheet 24 is arranged outside the shaft sleeve 12, one end of the positioning sheet 24 is connected with the end cover 18 through an inner hexagon screw 23, and the other end of the positioning sheet is connected with the driving ring 19 through an inner hexagon screw 22, so that the integral packaging of the sealing component is completed. The device is installed on equipment through a stud 25 and a hexagon nut 26, and after the installation is finished, the positioning sheet 24 and the inner hexagon screws 23 and 22 are removed.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.
Claims (10)
1. A dry gas sealing device for a pump convenient to assemble is characterized by comprising a cavity (8) positioned on a medium side, an end cover (18) positioned on an atmosphere side, a medium side static ring (5), an atmosphere side static ring (2), a dynamic ring (4) and a shaft sleeve (12);
the cavity (8) is connected with an end cover (18), the medium side static ring (5) is arranged in the cavity (8), the atmosphere side static ring (2) is arranged in the end cover (18), and the movable ring (4) is arranged on the shaft sleeve (12) and rotates along with the shaft sleeve (12);
the dynamic ring (4) is located between the medium side static ring (5) and the atmosphere side static ring (2), the outer diameters of two end faces of the dynamic ring are provided with micron-sized hydrodynamic grooves, the outer diameters of the medium side static ring and the atmosphere side static ring are provided with step structures, and two ends of the dynamic ring (4) respectively form friction pairs with the medium side static ring (5) and the atmosphere side static ring (2).
2. The dry gas sealing device for the pump convenient to assemble according to claim 1, wherein the atmosphere side static ring (2) and the medium side static ring (5) are symmetrically arranged at two sides of the dynamic ring (4), both adopt an L-shaped structure, and a boss is radially arranged outside the outer diameter of the sealing end face.
3. An easy-to-assemble dry gas seal device for a pump according to claim 2, wherein the shaft sleeve (12) is low at both ends and is outwardly protruded at the middle, and the movable ring is mounted on the protrusion of the shaft sleeve.
4. An easy-to-assemble dry gas seal device for a pump according to claim 3, wherein the media side stationary ring (5) is installed in the cavity (8) by an O-ring and a spring, and the spring acts on the back of the media side stationary ring (5) to keep the media side stationary ring (5) attached to the movable ring (4).
5. An easy-to-assemble dry gas seal device for a pump according to claim 3, wherein the atmosphere side stationary ring (2) is installed in the end cover (18) by an O-ring and a spring, and the spring acts on the back surface of the atmosphere side stationary ring (2) to keep the atmosphere side stationary ring (2) attached to the other end surface of the movable ring (4).
6. The dry gas sealing device for the pump, which is convenient to assemble according to claim 1, wherein the medium-side stationary ring (5) and the atmosphere-side stationary ring (2) are further provided with stationary ring rotation prevention pins.
7. The dry gas sealing device for the pump convenient to assemble according to claim 1, wherein grooves are formed in the cavity (8) and the end cover (18), and snap rings for limiting the axial position of the medium-side static ring (5) or the atmosphere-side static ring (2) are arranged in the grooves.
8. The dry gas sealing device for the pump convenient to assemble according to claim 1, wherein the rotating ring (4) is mounted on the shaft sleeve (12) through a snap ring and an O-shaped ring, the rotating ring (4) is provided with an anti-rotation pin for preventing the rotating ring (4) from rotating, and the anti-rotation pin is mounted in a pin hole.
9. An easy-to-assemble dry gas seal for a pump according to claim 1, wherein the sleeve (12) is fixedly provided at one end on the medium side with a pumping ring (11) by a snap ring.
10. The dry gas sealing device for the pump convenient to assemble according to claim 1, wherein the shaft sleeve (12) is fixed on the main shaft through a driving ring (19) and a jackscrew (20), a positioning plate (24) is arranged outside the shaft sleeve (12), one end of the positioning plate (24) is connected with the end cover (18) through an inner hexagonal screw, and the other end of the positioning plate is connected with the driving ring (19) through an inner hexagonal screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020343627.8U CN212803713U (en) | 2020-03-18 | 2020-03-18 | Dry gas sealing device convenient to assemble for pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020343627.8U CN212803713U (en) | 2020-03-18 | 2020-03-18 | Dry gas sealing device convenient to assemble for pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212803713U true CN212803713U (en) | 2021-03-26 |
Family
ID=75079911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020343627.8U Active CN212803713U (en) | 2020-03-18 | 2020-03-18 | Dry gas sealing device convenient to assemble for pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212803713U (en) |
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2020
- 2020-03-18 CN CN202020343627.8U patent/CN212803713U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201111 Room 102, building 3, no.508 Zixu Road, Minhang District, Shanghai Patentee after: Shanghai Yousai Sealing Technology Co.,Ltd. Address before: 201111 Room 102, building 3, no.508 Zixu Road, Minhang District, Shanghai Patentee before: Shanghai haomi Sealing Technology Co.,Ltd. |