CN110925430A - Mechanical sealing structure with bearing as sealing end face - Google Patents
Mechanical sealing structure with bearing as sealing end face Download PDFInfo
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- CN110925430A CN110925430A CN201911204803.8A CN201911204803A CN110925430A CN 110925430 A CN110925430 A CN 110925430A CN 201911204803 A CN201911204803 A CN 201911204803A CN 110925430 A CN110925430 A CN 110925430A
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- bearing
- ring
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- face
- end cover
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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
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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
- F16J15/3436—Pressing means
- F16J15/3452—Pressing means the pressing force resulting from the action of a spring
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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
- F16J15/38—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member sealed by a packing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Sealing (AREA)
Abstract
The invention relates to a mechanical sealing structure taking a bearing as a sealing end face, which comprises a middle cavity, a bearing end cover, a shaft sleeve, a bearing, a medium side compensation ring assembly and an atmosphere side compensation ring assembly, wherein the bearing is arranged in the bearing cavity, the outer ring of the bearing is fixedly connected to the inner wall of the bearing cavity, the inner ring of the bearing is fixedly connected with the shaft sleeve, the medium side compensation ring assembly and the atmosphere side compensation ring assembly have the same structure and are symmetrically arranged on the inner side and the outer side of the bearing, and end face sealing friction pairs are respectively formed between the medium side compensation ring assembly and the atmosphere side compensation ring assembly and the end face of the inner ring of the bearing. Compared with the prior art, the invention is suitable for equipment with large shaft diameter and small axial space, can be arranged in a small sealing cavity, provides a more stable sealing environment and can save cost.
Description
Technical Field
The invention relates to the technical field of sealing structures, in particular to a mechanical sealing structure with a bearing as a sealing end face.
Background
At present there are a large amount of mechanical seal structure, mostly are connected with quiet ring through being connected with on the equipment, are connected with the rotating ring in the pivot, are provided with the spring in order to guarantee the laminating of rotating ring terminal surface and quiet ring terminal surface at the rotating ring with quiet ring in the axial to the rotating ring can rotate for quiet ring. The structure that is common at present is as shown in fig. 2, and this structure is through establishing a long axle sleeve on the rotation axis, and long axle sleeve is equipped with bearing and end face seal mechanism outward, and this structural shortcoming is, need occupy great space during the installation, and it can't be applicable to the occasion that installation space is less, if in side agitator or pump, axial installation space is less, is difficult to install current mechanical seal structure, and mechanical seal's cost is higher.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a mechanical sealing structure which is suitable for equipment with a large shaft diameter and a small axial space, can be arranged in a small sealing cavity, provides a more stable sealing environment and can greatly save cost and is used as a sealing end face.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a mechanical seal structure for seal end face is done to bearing, includes middle cavity, bearing end cover, axle sleeve, bearing, medium side compensating ring subassembly and atmosphere side compensating ring subassembly, middle cavity, bearing cavity and bearing end cover connect gradually, and the rotation axis passes in proper order bearing end cover, bearing cavity and middle cavity, the fixed cover of axle sleeve is located on the rotation axis, set up in the bearing cavity the bearing, the outer lane rigid coupling of bearing in the inner wall of bearing cavity, the inner circle of bearing with the axle sleeve rigid coupling, the structure of medium side compensating ring subassembly and atmosphere side compensating ring subassembly is the same, and the symmetry sets up the inside and outside both sides of bearing, just medium side compensating ring subassembly and atmosphere side compensating ring subassembly respectively with it is vice to form the end face seal friction between the inner circle terminal surface of bearing.
Furthermore, the medium side compensation ring assembly comprises a medium side compensation ring, an O-shaped ring, a spring and an anti-rotation pin are arranged between the inner side of the medium side compensation ring and the middle cavity, and a friction pair is formed between the outer side of the medium side compensation ring and the end face of the inner ring of the bearing; the atmosphere side compensating ring assembly comprises an atmosphere side compensating ring, an O-shaped ring, a spring and an anti-rotating pin are arranged between the outer side of the atmosphere side compensating ring and the bearing end cover, and the inner side of the atmosphere side compensating ring and the end face of the inner ring of the bearing form a friction pair.
Furthermore, an inner end cover is arranged in the middle cavity and is connected with the middle cavity through an inner hexagon screw, and an O-shaped ring is arranged at the connection position.
Furthermore, an O-shaped ring is arranged between the inner end cover and the reaction kettle, a labyrinth, a throttling bush and a bush pressing plate are arranged on the inner diameter wall surface of the inner end cover, a small gap is formed between the inner diameter position of the throttling bush and the rotating shaft, the outer part of the throttling bush is limited by a spring and the bush pressing plate, and the bush pressing plate is fixed on the side surface of the bottom of the inner end cover through an inner hexagon screw. The medium end is equipped with the labyrinth, prevents that the granule in the medium from getting into the seal face, and medium side sealing ring is the spring isolation formula, prevents that the granule from blockking up the spring and arousing sealed inefficacy to be equipped with large-traffic flush fluid and wash the labyrinth, in order to prevent that the granule from getting into the seal face.
Furthermore, the bearing cavity is provided with a sealing liquid inlet and a sealing liquid outlet, and the sealing liquid inlet and the sealing liquid outlet are communicated with the atmosphere side cavity of the bearing cavity.
Further, the sealing liquid entering from the sealing liquid inlet comprises lubricating oil or water. The bearing is used as a rotating ring for a mechanical seal, and the bearing is positioned against the outer ring. The sealing liquid inlet and the sealing liquid outlet provide sealing liquid for the mechanical seal through an external system, so that the lubrication of the bearing is ensured, the temperature of the bearing can be effectively reduced, the mechanical seal can be used in a high-temperature state, the mechanical seal bearing can select a common deep groove ball bearing, and the axial direction of the inner side and the outer side of the bearing inner ring needs to be higher than that of the outer ring. In order to meet the requirement, a hard alloy wear-resistant layer can be welded on the inner ring of the bearing in a surfacing mode.
Furthermore, the bearing end cover also comprises a pressing plate and a positioning sheet, the pressing plate is clamped at the lower side part of the bearing end cover by the positioning sheet, the positioning sheet is fixed on the side surface of the bearing end cover through an inner hexagonal screw, and the lower part of the positioning sheet is clamped with the shaft sleeve;
furthermore, a framework oil seal mechanism is arranged between the shaft sleeve and the bearing end cover.
Furthermore, the bearing end cover is also provided with a leakage detection opening, the leakage detection opening is communicated with a cavity in the bearing end cover, and the framework oil seal is used for preventing the leakage of the seal and then directly leaking into the atmosphere.
Furthermore, the middle cavity and the bearing cavity are connected through an inner hexagon screw, and an O-shaped ring is arranged at the joint;
the shaft sleeve is connected with the bearing through a key, and an O-shaped ring is arranged at the connection part;
the shaft sleeve is fixedly connected with the rotating shaft through a jackscrew, and an O-shaped ring is arranged at the joint.
The end face of the inner ring of the bearing is provided with a wear-resistant coating, such as hard alloy, silicon carbide and other materials, so that the service life is prolonged.
The sealing structure bearing is a deep groove ball bearing, the two ends of the bearing are friction pairs, the end face of the compensating ring is pressed on the bearing, a space for mounting the bearing and a static ring is saved, and the floatability and the following performance of the compensating ring are good, so that the influence of the radial runout of the rotating shaft on sealing is prevented. The mechanical sealing end face is arranged at the bearing, and the mechanical sealing end face is high in precision and small in runout at the bearing, and the floating property of the compensating ring is good, so that the mechanical sealing end face can be used in an optimal working environment, and is suitable for a reaction kettle and similar sealing equipment.
Compared with the prior art, the invention has the following advantages:
(1) the sealing structure bearing is a deep groove ball bearing, the two ends of the bearing are friction pairs, the end face of a compensating ring is pressed on the bearing, a space for mounting the bearing and a static ring are saved, and the floating property and the following property of the compensating ring are good, so that the influence of radial runout of a rotating shaft on sealing is prevented;
(2) the mechanical sealing end face, namely the friction pair is arranged at the bearing, and the mechanical sealing end face, namely the friction pair, can be used in the optimal working environment because the precision of the bearing is high, the bounce is small, and the floatability of the compensating ring is good;
(3) the mechanical sealing structure uses lubricating oil or water as sealing liquid, so that the temperature of the bearing can be effectively reduced, and the mechanical sealing structure can be used in a high-temperature state;
(4) the mechanical sealing structure has the main advantages that the bearing is used as a sealing end face, and when the sealing structure is installed and used, the axial installation space is reduced, and a more stable sealing environment is provided;
(5) the structure can reduce the influence of temperature change on sealing.
Drawings
FIG. 1 is a schematic view of a mechanical seal according to an embodiment of the present invention;
FIG. 2 is a schematic view of a prior art mechanical seal;
the reference numbers in the figures indicate: the device comprises a labyrinth 1, a throttling bush 2, a bush pressing plate 3, a medium side compensation ring 4, a bearing 5, a key 6, an atmosphere side compensation ring 7, a framework oil seal mechanism 8, a middle cavity 9, a positioning sheet 10, a jackscrew 11, a bearing end cover 12, a leakage detection port 13, an inner end cover 14, a shaft sleeve 15, a bearing cavity 16, a sealing liquid inlet 17 and a sealing liquid outlet 18.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Examples
Fig. 2 is a schematic diagram of a conventional mechanical sealing structure, in which a long shaft sleeve 15 is sleeved on a rotating shaft, a bearing 5 and an end face sealing mechanism are arranged outside the long shaft sleeve 15, and the end face sealing mechanism is a double-end face mechanical sealing structure, and the structure needs to occupy a large space during installation, and cannot be applied to occasions with small installation space, such as a side stirrer or a pump, and has a small axial installation space, difficulty in installation and high cost.
In order to solve the problem, the invention provides a mechanical sealing structure taking a bearing as a sealing end face, as shown in figure 1, comprising a middle cavity 9, a bearing cavity 16, a bearing end cover 12, a shaft sleeve 15, a bearing 5, a medium side compensation ring component and an atmosphere side compensation ring component, wherein the middle cavity 9, the bearing cavity 16 and the bearing end cover 12 are sequentially connected, a rotating shaft sequentially penetrates through the bearing end cover 12, the bearing cavity 16 and the middle cavity 9, the shaft sleeve 15 is fixedly sleeved on the rotating shaft, the bearing 5 is arranged in the bearing cavity 16, the outer ring of the bearing 5 is fixedly connected with the inner wall of the bearing cavity 16, the inner ring of the bearing 5 is fixedly connected with the shaft sleeve 15, the structures of the medium side compensation ring component and the, the medium side compensation ring assembly and the atmosphere side compensation ring assembly are symmetrically arranged on the inner side and the outer side of the bearing 5, and end face sealing friction pairs are formed between the medium side compensation ring assembly and the inner ring end face of the bearing 5.
The middle cavity 9 and the bearing cavity 16 are connected through an inner hexagon screw, and an O-shaped ring is arranged at the joint; the shaft sleeve 15 is connected with the bearing 5 through a key 6, and an O-shaped ring is arranged at the connection part; the shaft sleeve 15 is fixedly connected with the rotating shaft through the jackscrew 11, an O-shaped ring is arranged at the joint, and a layer of gap is reserved between the shaft sleeve 15 and the rotating shaft.
The medium side compensation ring assembly comprises a medium side compensation ring 4, an O-shaped ring and a spring or an anti-rotation pin are arranged between the inner side of the medium side compensation ring 4 and the middle cavity 9, and the outer side of the medium side compensation ring 4 and the end face of the inner ring of the bearing 5 form a friction sealing end face; a spring to provide the compensating force and an O-ring as a secondary seal. The atmosphere side compensating ring assembly comprises an atmosphere side compensating ring 7, an O-shaped ring and a spring or an anti-rotation pin are arranged between the outer side of the atmosphere side compensating ring 7 and the bearing end cover 12, and the inner side of the atmosphere side compensating ring 7 and the end face of the inner ring of the bearing 5 form a friction sealing end face.
An inner end cover 14 is also arranged in the middle cavity 9, the middle cavity and the inner end cover are connected through an inner hexagon screw, and an O-shaped ring is arranged at the joint. An O-shaped ring is arranged in the middle of the inner end cover 14, a labyrinth 1, a throttling bush 2 and a bush pressing plate 3 are arranged at the inner diameter, a small gap is formed between the bottom surface of the throttling bush 2 and a rotating shaft, the left surface and the right surface are limited by a spring and the bush pressing plate 3 respectively, and the bush pressing plate 3 is fixed on the side surface of the bottom of the inner end cover 14 through an inner hexagon screw. The mechanical seal is a face-to-face balance type built-in mechanical seal, the medium end is provided with a labyrinth, particles in a medium are prevented from entering a seal end face, the medium side seal ring is in a spring isolation type, the particles are prevented from blocking the spring to cause seal failure, and a large-flow flushing liquid is provided to flush the labyrinth to prevent the particles from entering the seal end face.
In addition, the bearing cavity 16 may further be provided with a sealing liquid inlet 17 and a sealing liquid outlet 18, and the sealing liquid inlet 17 and the sealing liquid outlet 18 are communicated with the cavity of the bearing cavity 16. The sealing liquid entering the sealing liquid inlet 17 comprises lubricating oil or water. The bearing is used as a rotating ring of the mechanical seal, the bearing is positioned by the outer ring, the sealing liquid inlet is formed, the sealing liquid outlet provides sealing liquid for the mechanical seal through an external system, the lubrication of the bearing is guaranteed, the temperature of the bearing can be effectively reduced, and the mechanical seal can be used in a high-temperature state. The mechanical seal bearing can adopt a common deep groove ball bearing, and the inner side and the outer side of the inner ring of the bearing are higher than the outer ring in the axial direction. In order to meet the requirement, a hard alloy wear-resistant layer can be welded on the inner ring of the bearing in a surfacing mode.
The bearing end cover 12 also comprises a pressure plate and a positioning sheet 10, the pressure plate is clamped at the lateral lower part of the bearing end cover 12 by the positioning sheet 10, the positioning sheet 10 is fixed at the lateral surface of the bearing end cover 12 through a hexagon socket head cap screw, and the lower part of the positioning sheet 10 is clamped with the shaft sleeve 15; a framework oil seal mechanism 8 is further arranged between the shaft sleeve 15 and the bearing end cover 12 and used for sealing. The bearing end cover 12 is also provided with a leakage detection port 13, the leakage detection port 13 is communicated with a cavity in the bearing end cover 12, and the framework oil seal can prevent the leakage of the seal and then directly leaks into the atmosphere.
The sealing structure moving ring is a deep groove ball bearing, the two ends of the bearing are friction pairs, the end face of a compensating ring is pressed on the bearing, the space of a static ring and a mounting bearing is saved, the floatability and the following performance of the compensating ring are good, the influence of radial runout of a rotating shaft on sealing is prevented, the end face of the mechanical sealing is arranged at the bearing, and the mechanical sealing end face is high in precision and small in runout of the bearing, the floatability of the compensating ring is good, so that the sealing structure can be used in the optimal working environment.
The embodiments described above are described to facilitate an 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 based on the disclosure of the present invention.
Claims (10)
1. A mechanical seal structure with a bearing as a seal end face is characterized by comprising a middle cavity (9), a bearing cavity (16), a bearing end cover (12), a shaft sleeve (15), a bearing (5), a medium side compensation ring component and an atmosphere side compensation ring component,
the middle cavity (9), the bearing cavity (16) and the bearing end cover (12) are connected in sequence, the rotating shaft sequentially penetrates through the bearing end cover (12), the bearing cavity (16) and the middle cavity (9), the shaft sleeve (15) is fixedly sleeved on the rotating shaft, the bearing (5) is arranged in the bearing cavity (16), the outer ring of the bearing (5) is fixedly connected with the inner wall of the bearing cavity (16), the inner ring of the bearing (5) is fixedly connected with the shaft sleeve (15),
the medium side compensation ring assembly and the atmosphere side compensation ring assembly are identical in structure and are symmetrically arranged on the inner side and the outer side of the bearing (5), and end face sealing friction pairs are formed between the medium side compensation ring assembly and the atmosphere side compensation ring assembly and the end face of the inner ring of the bearing (5) respectively.
2. A mechanical seal structure of a bearing as a seal end face according to claim 1, characterized in that the medium side compensation ring component comprises a medium side compensation ring (4), an O-ring, a spring and an anti-rotation pin are arranged between the inner side of the medium side compensation ring (4) and the middle cavity (9), and the outer side of the medium side compensation ring (4) and the inner ring end face of the bearing (5) form a friction pair;
the atmosphere side compensating ring assembly comprises an atmosphere side compensating ring (7), an O-shaped ring, a spring and an anti-rotating pin are arranged between the outer side of the atmosphere side compensating ring (7) and the bearing end cover (12), and the inner side of the atmosphere side compensating ring (7) and the end face of the inner ring of the bearing (5) form a friction pair.
3. A mechanical seal structure of a bearing as a seal end face according to claim 1, characterized in that the inner side of the middle cavity (9) is further provided with an inner end cap (14) which is connected with the inner end cap through a hexagon socket head cap screw and is provided with an O-ring at the joint.
4. The mechanical seal structure of a bearing as a seal end face according to claim 3, characterized in that an O-shaped ring is arranged between the inner end cover (14) and the reaction kettle, a labyrinth (1), a throttling bush (2) and a bush pressing plate (3) are arranged on the inner diameter wall surface of the inner end cover (14), a tiny gap is formed between the inner diameter of the throttling bush (2) and the rotating shaft, the outside is limited by a spring and the bush pressing plate (3), and the bush pressing plate (3) is fixed on the inner end cover (14) through an inner hexagon screw.
5. A mechanical seal structure with a bearing as a seal end face according to claim 1, characterized in that the bearing cavity (16) is provided with a sealing liquid inlet (17) and a sealing liquid outlet (18), and the sealing liquid inlet (17) and the sealing liquid outlet (18) are communicated with the atmosphere side chamber of the bearing cavity (16).
6. A mechanical seal structure of a bearing as a seal end face according to claim 5, characterized in that the sealing liquid entering from the sealing liquid inlet (17) comprises lubricating oil or water.
7. The mechanical seal structure of a bearing as a seal end face according to claim 1 is characterized in that the bearing end cover (12) further comprises a pressure plate and a positioning plate (10), and the positioning plate (10) is fixed on the side face of the bearing end cover (12) through a hexagon socket head cap screw.
8. A mechanical seal structure for a bearing as a seal end face according to claim 1, characterized in that a framework oil seal mechanism (8) is further arranged in the cavity between the shaft sleeve (15) and the bearing end cover (12).
9. A mechanical seal structure of a bearing as a seal end face according to claim 8, characterized in that the bearing end cover (12) is further provided with a leak detection port (13), and the leak detection port (13) is communicated with a cavity in the bearing end cover (12).
10. A mechanical seal structure of a bearing as a seal end face according to claim 1, characterized in that the middle cavity (9) and the bearing cavity (16) are connected through a socket head cap screw, and an O-ring is arranged at the connection;
the shaft sleeve (15) is connected with the bearing (5) through a key (6), and an O-shaped ring is arranged at the connection part;
the shaft sleeve (15) is fixedly connected with the rotating shaft through a jackscrew (11), and an O-shaped ring is arranged at the connection part;
and the end face of the inner ring of the bearing (5) is provided with a wear-resistant coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911204803.8A CN110925430A (en) | 2019-11-29 | 2019-11-29 | Mechanical sealing structure with bearing as sealing end face |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911204803.8A CN110925430A (en) | 2019-11-29 | 2019-11-29 | Mechanical sealing structure with bearing as sealing end face |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110925430A true CN110925430A (en) | 2020-03-27 |
Family
ID=69847884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911204803.8A Pending CN110925430A (en) | 2019-11-29 | 2019-11-29 | Mechanical sealing structure with bearing as sealing end face |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110925430A (en) |
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2019
- 2019-11-29 CN CN201911204803.8A patent/CN110925430A/en active Pending
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