CN107401617B - Combined sealing device for rotating shaft - Google Patents
Combined sealing device for rotating shaft Download PDFInfo
- Publication number
- CN107401617B CN107401617B CN201710736973.5A CN201710736973A CN107401617B CN 107401617 B CN107401617 B CN 107401617B CN 201710736973 A CN201710736973 A CN 201710736973A CN 107401617 B CN107401617 B CN 107401617B
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- Prior art keywords
- ring
- sealing
- seat
- rotating shaft
- movable
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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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Sealing (AREA)
Abstract
The invention discloses a combined sealing device for a rotating shaft, which comprises a rotating shaft, wherein one end of the rotating shaft is in interference fit with a movable ring seat and a movable ring, the movable ring seat is connected with the movable ring through a compression spring, a sealing ring is clamped and fixed in the movable ring seat, the other end of the rotating shaft is in sealed and rotating fit with a static ring and a sealing seat, and the static ring is attached and fixed at the outer end of the sealing seat and is positioned in the sealing ring; according to the invention, through the matching design of the sealing ring and the sealing seat, the sealing performance of the horn-shaped sealing ring can be reliably ensured under the condition that the rotating shaft does not rotate or rotates at a low speed, and the problem of poor sealing performance of the rotating ring and the static ring at a low speed is solved; and then the wedge-shaped space formed between the horn-shaped sealing ring and the sealing seat effectively ensures the lubricating environment of the movable ring and the static ring, so that the combined sealing device can prolong the service life of the sealing device well and enhance the sealing performance.
Description
Technical Field
The invention belongs to the field of machine manufacturing, and particularly relates to a sealing device, in particular to a combined sealing device for a rotating shaft.
Background
The mechanical seal is a shaft seal device of a rotating machine. Such as centrifugal pumps, centrifuges, reaction kettles, compressors, and the like. Since the drive shaft extends through the apparatus, there is a circumferential gap between the shaft and the apparatus through which the medium in the apparatus leaks outwards, and if the pressure in the apparatus is below atmospheric pressure, air leaks into the apparatus, so a leak-proof shaft seal arrangement is necessary. The shaft seal has many kinds, and the mechanical seal has the advantages of small leakage amount, long service life and the like, so the mechanical seal is the most important shaft sealing mode in the devices in the world today. Mechanical seals, also called face seals, are defined in the relevant national standards as follows: "means for preventing fluid leakage, which is composed of at least one pair of end faces perpendicular to the rotation axis, and which are kept in contact and relatively slide under the action of fluid pressure and the elastic force (or magnetic force) of the compensating mechanism and the cooperation of the auxiliary seal. "
Under the pivot does not rotate or the low-speed condition, only under the elasticity effect that relies on compression spring, rotating ring and quiet ring sealing performance under the low-speed are poor, cause medium outwards to reveal in the equipment, and simultaneously, at the rotation in-process of pivot, need guarantee that coupling part has fine lubricity, and because the poor problem of sealing performance, lead to inside lubricating oil or water to reveal away, it is big to lead to mechanical seal's wearing and tearing, equipment running noise is big, equipment life is low, the maintenance is frequent, the increase cost drops into.
Disclosure of Invention
In order to overcome the technical problems, the invention aims to provide a combined sealing device for a rotating shaft, through the matching design of a sealing ring and a sealing seat, the sealing performance of a horn-shaped sealing ring can be reliably ensured under the condition that the rotating shaft does not rotate or rotates at a low speed, and the problem that the sealing performance of a rotating ring and a static ring is poor at a low speed is solved; and then the wedge-shaped space formed between the horn-shaped sealing ring and the sealing seat effectively ensures the lubricating environment of the movable ring and the static ring, so that the combined sealing device can prolong the service life of the sealing device well and enhance the sealing performance.
The purpose of the invention can be realized by the following technical scheme:
a combined sealing device for a rotating shaft comprises the rotating shaft, wherein a movable ring seat and a movable ring are in interference fit at one end of the rotating shaft, the movable ring seat is connected with the movable ring through a compression spring, a sealing ring is clamped and fixed in the movable ring seat, a static ring and a sealing seat are in sealing and rotating fit at the other end of the rotating shaft, and the static ring is attached and fixed at the outer end of the sealing seat and is positioned in the sealing ring;
the rotating shaft driven ring seat, the compression spring, the moving ring, the sealing ring, the static ring and the sealing seat sequentially penetrate through the rotating shaft driven ring seat;
one end of the sealing ring extends outwards to form a clamping ring, the other end of the sealing ring is provided with a horn-shaped sealing ring, the horn-shaped sealing ring is an elastic piece, the sealing performance of the horn-shaped sealing ring can be reliably ensured under the condition that the rotating shaft does not rotate or the rotating speed is low, and the problem that the sealing performance of the rotating ring and the static ring is poor at low speed is solved;
the horn-shaped sealing ring is attached to the sealing seat, a certain wedge-shaped space is formed between the horn-shaped sealing ring and the sealing seat, and the wedge-shaped space can ensure the lubricating environment of the movable ring and the static ring, so that the combined sealing device can prolong the service life of the sealing device well and enhance the sealing performance;
the rotating speed change through the rotating shaft, under the action of different centrifugal forces, the connecting angle between the horn-shaped sealing ring and the sealing seat is changed, when the rotating shaft rotating speed is large, the centrifugal force enables the horn-shaped sealing ring to be separated from the sealing seat, the abrasion of the horn-shaped sealing ring at high speed is avoided, and the movable ring and the static ring can provide stable sealing performance at the moment.
As a further scheme of the invention: the movable ring seat is characterized in that a first placing groove used for fixing a compression spring is formed in the inner side of the movable ring seat, a second placing groove located above the first placing groove is formed in the inner side of the movable ring seat, the second placing groove has a limiting effect on the movement of a piston of the movable ring, and a clamping groove used for clamping and fixing a sealing ring is formed in the upper end of the movable ring seat in an outward extending mode.
As a further scheme of the invention: one end of the movable ring is provided with a first baffle platform extending outwards, the other end of the movable ring is connected with the stationary ring in an extrusion mode under the action of the compression spring, and the center of the inner side of the movable ring is provided with a second baffle platform extending inwards.
As a further scheme of the invention: the first baffle table of the movable ring is arranged in the second placing groove in a sliding manner;
one end of the compression spring is fixed at the bottom of the first placing groove of the movable ring seat, and the other end of the compression spring is fixed on the second baffle table of the movable ring.
As a further scheme of the invention: the sealing ring is arranged in the clamping groove of the movable ring seat, and the clamping ring is in interference fit with the bottom of the clamping groove.
As a further scheme of the invention: an annular groove is formed in the static ring, balls are placed in the groove, the static ring is rotationally connected with the rotating shaft through the balls, and the matching resistance between the static ring and the rotating shaft is effectively reduced.
The invention has the beneficial effects that: according to the invention, through the matching design of the sealing ring and the sealing seat, the sealing performance of the horn-shaped sealing ring can be reliably ensured under the condition that the rotating shaft does not rotate or rotates at a low speed, and the problem of poor sealing performance of the rotating ring and the static ring at a low speed is solved; when the rotating shaft rotates at a high speed, the horn-shaped sealing ring is separated from the sealing seat by centrifugal force, so that the horn-shaped sealing ring is prevented from being worn at a high speed, and the movable ring and the static ring can provide stable sealing performance; the wedge-shaped space can ensure the lubricating environment of the movable ring and the static ring, so the combined sealing device can prolong the service life of the sealing device well and enhance the sealing performance.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a combined sealing device for a rotating shaft according to the present invention.
Fig. 2 is a cross-sectional view of the present invention.
Fig. 3 is an exploded view of fig. 1.
Fig. 4 is a schematic structural view of the movable ring seat in fig. 1.
Fig. 5 is a schematic structural view of the rotating ring in fig. 1.
Fig. 6 is an exploded view of the fit between the rotating ring seat and the rotating ring.
Fig. 7 is a schematic view of the structure of the sealing ring of fig. 1.
FIG. 8 is an exploded view of the fit between the moving ring seat, the sealing ring, the stationary ring, and the sealing seat.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, 2 and 3, a combined sealing device for a rotating shaft comprises a rotating shaft 1, wherein one end of the rotating shaft 1 is in interference fit with a moving ring seat 2 and a moving ring 3, the moving ring seat 2 and the moving ring 3 are connected through a compression spring 4, a sealing ring 5 is fixed in the moving ring seat 2 in a clamping manner, a stationary ring 6 and a sealing seat 7 are fixed at the other end of the rotating shaft 1 in a sealing and rotating manner, the stationary ring 6 is fixed at the outer end of the sealing seat 7 in a clamping manner and is positioned in the sealing ring 5, and the rotating shaft 1 penetrates through the moving ring seat 2, the compression spring 4, the moving ring 3, the sealing ring 5, the stationary ring 6 and the sealing seat 7 in sequence;
as shown in fig. 4, a first placing groove 201 for fixing the compression spring 4 is arranged on the inner side of the moving ring seat 2, a second placing groove 202 is arranged on the inner side of the moving ring seat 2 and above the first placing groove 201, the second placing groove 202 has a limiting effect on the movement of the piston of the moving ring 3, and a clamping groove 203 for clamping the fixed sealing ring 5 is outwards extended from the upper end of the moving ring seat 2;
as shown in fig. 5, one end of the moving ring 3 is provided with a first stop 301 extending outward, the other end of the moving ring 3 is connected with the stationary ring 6 in an extruding manner under the action of the compression spring 4, and the center of the inner side of the moving ring 3 is provided with a second stop 302 extending inward;
as shown in fig. 6, the first stopping platform 301 of the moving ring 3 is slidably disposed in the second placing groove 202; one end of the compression spring 4 is fixed at the bottom of the first placing groove 201 of the movable ring seat 2, and the other end of the compression spring 4 is fixed on the second baffle table 302 of the movable ring 3;
as shown in fig. 7, one end of the sealing ring 5 extends outwards to form a clamping ring 501, the other end of the sealing ring 5 is provided with a horn-shaped sealing ring 502, and the horn-shaped sealing ring 502 is an elastic member;
as shown in fig. 8, the sealing ring 5 is disposed in the engaging groove 203 of the moving ring seat 2, the engaging ring 501 is in interference fit with the bottom of the engaging groove 203, the flared sealing ring 502 is attached to the sealing seat 7, a certain wedge-shaped space is formed between the flared sealing ring 502 and the sealing seat 7, and the connecting angle between the flared sealing ring 502 and the sealing seat 7 is changed under the action of different centrifugal forces due to the change of the rotating speed of the rotating shaft 1;
under the condition that the rotating shaft 1 does not rotate or rotates at a low speed, the horn-shaped sealing ring 502 can reliably ensure the sealing property, and the problem of poor sealing performance of the rotating ring 3 and the static ring 6 at the low speed is solved; when the rotating speed of the rotating shaft 1 is high, centrifugal force enables the horn-shaped sealing ring 502 to be separated from the sealing seat 7, abrasion of the horn-shaped sealing ring 502 at high speed is avoided, and the movable ring 3 and the fixed ring 6 can provide stable sealing performance; the wedge-shaped space can ensure the lubricating environment of the movable ring 3 and the static ring 6, so the combined sealing device can prolong the service life of the sealing device well and enhance the sealing performance;
be equipped with the annular groove in the quiet ring 6, place ball 601 in the recess, quiet ring 6 rolls through ball 601 and pivot 1 and links to each other, the effectual cooperation resistance that reduces between quiet ring 6 and the pivot 1.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to 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, the schematic representations of the terms used above do 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.
The foregoing is merely illustrative and explanatory of the present invention and various modifications, additions or substitutions may be made to the specific embodiments described by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (6)
1. The combined sealing device for the rotating shaft is characterized by comprising the rotating shaft (1), wherein one end of the rotating shaft (1) is in interference fit with a movable ring seat (2) and a movable ring (3), the movable ring seat (2) and the movable ring (3) are connected through a compression spring (4), a sealing ring (5) is fixedly clamped in the movable ring seat (2), the other end of the rotating shaft (1) is in sealing and rotating fit with a static ring (6) and a sealing seat (7), and the static ring (6) is fixedly attached to the outer end of the sealing seat (7) and is positioned inside the sealing ring (5);
the rotating shaft (1) penetrates through the driven ring seat (2), the compression spring (4), the movable ring (3), the sealing ring (5), the static ring (6) and the sealing seat (7) in sequence;
one end of the sealing ring (5) extends outwards to form a clamping ring (501), the other end of the sealing ring (5) is provided with a horn-shaped sealing ring (502), and the horn-shaped sealing ring (502) is an elastic piece;
the horn-shaped sealing ring (502) is attached to the sealing seat (7), and a certain wedge-shaped space is formed between the horn-shaped sealing ring (502) and the sealing seat (7);
through the change of the rotating speed of the rotating shaft (1), under the action of different centrifugal forces, the connection angle between the horn-shaped sealing ring (502) and the sealing seat (7) is changed.
2. The combined sealing device for the rotating shaft according to claim 1, wherein a first placing groove (201) for fixing the compression spring (4) is formed in the inner side of the movable ring seat (2), a second placing groove (202) located above the first placing groove (201) is formed in the inner side of the movable ring seat (2), and a clamping groove (203) for clamping and fixing the sealing ring (5) is formed in the upper end of the movable ring seat (2) in an outward extending mode.
3. The combined sealing device for the rotating shaft according to claim 1, wherein one end of the movable ring (3) is provided with a first stop (301) extending outwards, the other end of the movable ring (3) is connected with the stationary ring (6) in a pressing manner under the action of the compression spring (4), and a second stop (302) extending inwards is arranged at the central position inside the movable ring (3).
4. A combined seal for a rotating shaft according to any one of claims 1 to 3, characterised in that the first abutment (301) of the rotating ring (3) is slidingly arranged in the second resting groove (202);
one end of the compression spring (4) is fixed at the bottom of the first placing groove (201) of the movable ring seat (2), and the other end of the compression spring (4) is fixed on the second blocking platform (302) of the movable ring (3).
5. The combined sealing device for the rotating shaft according to claim 1 or 2, wherein the sealing ring (5) is arranged in the clamping groove (203) of the movable ring seat (2), and the clamping ring (501) is in interference fit at the bottom of the clamping groove (203).
6. A combined seal for a rotating shaft according to claim 1, characterised in that the stationary ring (6) is provided with an annular groove in which the balls (601) are placed, the stationary ring (6) being rotatably connected to the rotating shaft (1) by means of the balls (601).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710736973.5A CN107401617B (en) | 2017-08-24 | 2017-08-24 | Combined sealing device for rotating shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710736973.5A CN107401617B (en) | 2017-08-24 | 2017-08-24 | Combined sealing device for rotating shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107401617A CN107401617A (en) | 2017-11-28 |
| CN107401617B true CN107401617B (en) | 2023-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710736973.5A Active CN107401617B (en) | 2017-08-24 | 2017-08-24 | Combined sealing device for rotating shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107401617B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307298B (en) * | 2019-06-19 | 2022-06-07 | 哈尔滨工业大学（威海） | Mechanical dynamic sealing device based on planetary gear mechanism |
| CN112682513B (en) * | 2020-12-18 | 2023-01-20 | 武汉宇格电力设备有限公司 | Self-lubricating mechanical seal |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463902A (en) * | 2009-01-13 | 2009-06-24 | 济宁安泰矿山设备制造有限公司 | Mechanical seal stationary ring and rotating ring, and double-end mechanical seal composed of the same |
| WO2016058457A1 (en) * | 2014-10-15 | 2016-04-21 | 邢宇 | Bushing for cooling dual-side mechanical seal friction pair and centrifugal pump cooling system thereof |
-
2017
- 2017-08-24 CN CN201710736973.5A patent/CN107401617B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463902A (en) * | 2009-01-13 | 2009-06-24 | 济宁安泰矿山设备制造有限公司 | Mechanical seal stationary ring and rotating ring, and double-end mechanical seal composed of the same |
| WO2016058457A1 (en) * | 2014-10-15 | 2016-04-21 | 邢宇 | Bushing for cooling dual-side mechanical seal friction pair and centrifugal pump cooling system thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107401617A (en) | 2017-11-28 |
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