CN211738030U - Spring-free mechanical sealing device - Google Patents
Spring-free mechanical sealing device Download PDFInfo
- Publication number
- CN211738030U CN211738030U CN202020268719.4U CN202020268719U CN211738030U CN 211738030 U CN211738030 U CN 211738030U CN 202020268719 U CN202020268719 U CN 202020268719U CN 211738030 U CN211738030 U CN 211738030U
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- ring
- seat
- shaft sleeve
- static
- gland
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Abstract
The utility model discloses a mechanical sealing device without a spring, which comprises a shaft sleeve, a movable ring, a static ring, a pump cavity gland and a sealing cavity seat; the shaft sleeve is arranged on the transmission shaft, an O ring of the shaft sleeve is arranged between the shaft sleeve and the transmission shaft, and a movable ring is fixedly arranged at one end of the shaft sleeve; the sealing cavity seat is sleeved on the shaft sleeve, the pump cavity gland is sleeved on the sealing cavity seat, a sealing cavity seat O ring is arranged between the inner ring surface of the pump cavity gland close to one side of the transmission ring and the outer ring surface of the sealing cavity seat, an annular gap is formed between the inner ring surface of the pump cavity gland close to one side of the moving ring and the outer ring surface of the sealing cavity seat, and the static ring is arranged in the annular gap. The utility model overcomes among the prior art mechanical seal device need not to use the skeleton oil blanket because of the easy defect that produces the fluid and reveal of spring inefficacy, has avoided the operation of carrying out chromium plating to the axle sleeve, has not only reduced mechanical seal device's manufacturing cost, has also solved the axle sleeve moreover and has easily caused the problem that the fluid was revealed because of being rubbed by the skeleton oil blanket, long service life.
Description
Technical Field
The utility model relates to a mechanical seal technical field, concretely relates to no spring mechanical seal device.
Background
In pumps and other fluid machines, a shaft seal must be provided to prevent leakage, since the drive shaft penetrates inside and outside the machine, a circumferential gap exists between the shaft and the machine, and the medium in the machine leaks out through the gap, and if the pressure in the machine is lower than the atmospheric pressure, air leaks into the machine. The mechanical seal is a shaft seal, also called a face seal, which is a device for preventing fluid leakage, and is formed by at least one pair of end faces perpendicular to a rotation axis, under the action of fluid pressure and elastic or magnetic force of a compensation mechanism and the cooperation of an auxiliary seal, the end faces are kept in fit and relatively slide.
Mechanical seal among the prior art includes quiet ring subassembly, rotating ring subassembly and spring, and wherein quiet ring subassembly cup joints on the transmission shaft and the tight fit is in the mounting hole of the pump body, and rotating ring subassembly tight fit is on the transmission shaft, carries out clearance compensation through end face seal and through the spring between quiet ring subassembly and the rotating ring subassembly.
The mechanical sealing device in the prior art mainly has the following problems: 1. cooling water must be sealed by a framework oil seal, the shaft sleeve must be subjected to chromium plating treatment, otherwise the shaft sleeve is abraded by the framework oil seal to form a groove, and fluid leakage is easily caused; 2. along with the use of the mechanical sealing device, the elasticity of the spring is smaller and smaller, and the mechanical sealing device can generate fluid leakage after the spring force fails; 3. the cooling water must be always on, otherwise the service life of the mechanical sealing device is greatly reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the above-mentioned not enough, provide a no spring mechanical seal device, overcome among the prior art mechanical seal device because of the spring inefficacy easily produce the defect that the fluid was revealed, need not to use the skeleton oil blanket, avoided the operation of shaft sleeve chromium plating treatment, not only reduced mechanical seal device's manufacturing cost, also solved the shaft sleeve moreover and easily caused the problem that the fluid was revealed because of being rubbed by the skeleton oil blanket, long service life.
In order to achieve the purpose, the utility model provides the following technical scheme, a mechanical sealing device without a spring comprises a shaft sleeve, a movable ring, a static ring, a pump cavity gland and a sealing cavity seat;
the shaft sleeve is arranged on the transmission shaft, a shaft sleeve O ring is arranged between the shaft sleeve and the transmission shaft, one end of the shaft sleeve is fixedly provided with the movable ring, and the other end of the shaft sleeve is fixed on the transmission shaft through the matching of the transmission ring and a locking screw A;
the sealing cavity seat is sleeved on the shaft sleeve and positioned between the movable ring and the transmission ring, a positioning block embedded on the shaft sleeve is arranged on the end face of the side wall of the sealing cavity seat facing one side of the transmission ring, and the positioning block is fixedly connected with the sealing cavity seat through a locking screw B;
the pump cavity gland is sleeved on the seal cavity seat, a seal cavity seat O ring is arranged between the inner ring surface of the pump cavity gland close to one side of the transmission ring and the outer ring surface of the seal cavity seat, an annular gap is formed between the inner ring surface of the pump cavity gland close to one side of the moving ring and the outer ring surface of the seal cavity seat, and the static ring is arranged in the annular gap; a first static ring O ring is arranged between the outer ring surface of the static ring and the inner ring surface of the pump cavity gland, and a second static ring O ring is arranged between the inner ring surface of the static ring and the outer ring surface of the sealing cavity seat; one ends of the static ring and the dynamic ring opposite to each other are mutually abutted;
a sealing cavity is formed among the static ring, the pump cavity gland, the sealing cavity seat O ring, the first static ring O ring and the second static ring O ring; and the pump cavity gland is provided with an air inlet communicated with the sealing cavity, and the air inlet is connected with an external air source.
Wherein, the external air source in the utility model is inert gas.
Furthermore, a spigot seat is arranged on the shaft sleeve, the movable ring is installed in the spigot seat, and one end of the movable ring, which deviates from the transmission ring, is fixedly connected with the vertical end face of the spigot seat through a movable ring anti-rotation pin.
Preferably, a moving ring O-ring is arranged between the outer ring surface of the moving ring and the inner ring surface of the spigot seat.
Furthermore, the inner ring surface of the shaft sleeve is provided with a first groove, and the shaft sleeve O ring is fixed in the first groove.
Furthermore, the inner ring surface of the pump cavity gland is provided with a second groove, and the first stationary ring O ring is fixedly connected in the second groove.
Furthermore, a third groove and a fourth groove are respectively formed in the outer annular surface of the sealing cavity seat, the second stationary ring O-ring is fixedly connected into the third groove, and the sealing cavity seat O-ring is fixedly connected into the fourth groove.
Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model relates to a no spring mechanical seal device, overcome the defect that mechanical seal device easily produces fluid and reveals because of the spring inefficacy among the prior art, need not to use the skeleton oil blanket, avoided the operation of shaft sleeve chromium plating treatment, not only reduced mechanical seal device's manufacturing cost, but also solved the shaft sleeve and easily caused the problem that the fluid reveals because of being rubbed by the skeleton oil blanket, long service life; in the utility model, inert gas is introduced into the sealing cavity through the air inlet, and the static ring is driven to move in the annular gap along the axial direction of the shaft sleeve to the end, opposite to the dynamic ring, of the static ring to be mutually abutted, so as to play a role in sealing; meanwhile, under the condition that the mechanical sealing device partially leaks, the problem that the mechanical sealing device leaks is solved by increasing the pressure of an external air source.
Drawings
Fig. 1 is a schematic structural view of the spring-free mechanical sealing device of the present invention.
The correspondence between each mark and the part name is as follows:
the sealing structure comprises a shaft sleeve 1, a moving ring 2, a static ring 3, a pump cavity gland 4, an air inlet 401, a sealing cavity seat 5, a transmission shaft 6, a shaft sleeve O ring 7, a locking screw A8, a spigot seat 9, a moving ring anti-rotation pin 10, a moving ring O ring 11, a positioning block 12, a locking screw B13, a sealing cavity seat O ring 14, a first static ring O ring 15, a second static ring O ring 16, a first groove 17, a second groove 18, a third groove 19, a fourth groove 20 and a transmission ring 21.
Detailed Description
In order to make the technical means, the inventive features, the objectives and the functions of the present invention easy to understand, the present invention will be further described with reference to the following specific drawings.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" 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 should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, connected through an intermediate medium, or connected to the inside of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Examples
As shown in fig. 1, a mechanical sealing device without spring comprises a shaft sleeve 1, a moving ring 2, a stationary ring 3, a pump cavity gland 4 and a sealing cavity seat 5.
The axle sleeve 1 is installed on the transmission shaft 6, is provided with axle sleeve O circle 7 between axle sleeve 1 and transmission shaft 6, and axle sleeve 1 one end is fixed and is equipped with rotating ring 2, and the other end passes through transmission ring 21 cooperation locking screw A8 to be fixed in on the transmission shaft 6.
Wherein, the inner ring surface of axle sleeve 1 is equipped with first recess 17, and axle sleeve O circle 7 is fixed in first recess 17.
Wherein, be equipped with tang seat 9 on the axle sleeve 1, rotating ring 2 installs in tang seat 9, and rotating ring 2 deviates from and sets up between the terminal surface through rotating ring antirotation pin 10 fixed connection between the one end of driving ring 21 and tang seat 9, is provided with rotating ring O circle 11 between the outer anchor ring of rotating ring 2 and the interior anchor ring of tang seat 9.
The sealing cavity seat 5 is sleeved on the shaft sleeve 1, the sealing cavity seat 5 is positioned between the moving ring 2 and the transmission ring 21, a positioning block 12 embedded on the shaft sleeve 1 is arranged at the end face of the side wall of the sealing cavity seat 5 facing one side of the transmission ring 21, and the positioning block 12 is fixedly connected with the sealing cavity seat 5 through a locking screw B13.
The pump cavity gland 4 is sleeved on the seal cavity seat 5, a seal cavity seat O ring 14 is arranged between the inner ring surface of the pump cavity gland 4 close to one side of the transmission ring 21 and the outer ring surface of the seal cavity seat 5, an annular gap is formed between the inner ring surface of the pump cavity gland 4 close to one side of the movable ring 2 and the outer ring surface of the seal cavity seat 5, and the static ring 3 is arranged in the annular gap; a first static ring O ring 15 is arranged between the outer annular surface of the static ring 3 and the inner annular surface of the pump cavity gland 4, and a second static ring O ring 16 is arranged between the inner annular surface of the static ring 3 and the outer annular surface of the sealing cavity seat 5; the stationary ring 3 and the movable ring 2 are abutted against each other at opposite ends thereof.
Wherein, the inner ring surface of pump chamber gland 4 is equipped with second recess 18, and first quiet ring O circle 15 fixed connection is in second recess 18.
Wherein, the outer ring surface of the seal cavity seat 5 is respectively provided with a third groove 19 and a fourth groove 20, the second stationary ring O-ring 16 is fixedly connected in the third groove 19, and the seal cavity seat O-ring 14 is fixedly connected in the fourth groove 20.
A sealing cavity is formed among the static ring 3, the pump cavity gland 4, the sealing cavity seat 5, the sealing cavity seat O ring 14, the first static ring O ring 15 and the second static ring O ring 16; the pump cavity gland 4 is provided with an air inlet 401 communicated with the sealed cavity, and the air inlet 401 is connected with an external air source (not shown in the figure).
Wherein, external air supply in the utility model is inert gas, and inert gas selects nitrogen gas usually.
The utility model provides a when mechanical seal device used, pump chamber gland 4, sealed chamber seat 5 loop through locking screw C (not shown in the figure) and are fixed in on pump case (not shown in the figure).
When the mechanical sealing device in the utility model is used, inert gas is introduced into the sealing cavity through the air inlet 401, and the static ring 3 is driven to move along the axial direction of the shaft sleeve 1 in the annular gap to the end, opposite to the dynamic ring 2, of the static ring 3 to abut against each other, so that the sealing effect is achieved; meanwhile, under the condition that the mechanical sealing device partially leaks, the problem that the mechanical sealing device leaks is solved by increasing the pressure of an external air source.
The utility model discloses well rotating ring 2 and quiet ring 3 all adopt arbitrary one material processing in graphite, carbide and the carborundum to form.
The utility model provides a shaft sleeve O circle 7, rotating ring O circle 11, sealed chamber seat O circle 14, first quiet ring O circle 15, the quiet ring O of second circle 16 are O type sealing washer.
Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model relates to a no spring mechanical seal device has overcome among the prior art mechanical seal device and has easily produced the defect that the fluid was revealed because of the spring inefficacy, need not to use the skeleton oil blanket, has avoided carrying out the operation of chromium plating processing to axle sleeve 1, has not only reduced mechanical seal device's manufacturing cost, has also solved axle sleeve 1 moreover and has easily caused the problem that the fluid was revealed because of being rubbed by the skeleton oil blanket, long service life.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A springless mechanical sealing device is characterized by comprising a shaft sleeve, a movable ring, a static ring, a pump cavity gland and a sealing cavity seat;
the shaft sleeve is arranged on the transmission shaft, a shaft sleeve O ring is arranged between the shaft sleeve and the transmission shaft, one end of the shaft sleeve is fixedly provided with the movable ring, and the other end of the shaft sleeve is fixed on the transmission shaft through the matching of the transmission ring and a locking screw A;
the sealing cavity seat is sleeved on the shaft sleeve and positioned between the movable ring and the transmission ring, a positioning block embedded on the shaft sleeve is arranged on the end face of the side wall of the sealing cavity seat facing one side of the transmission ring, and the positioning block is fixedly connected with the sealing cavity seat through a locking screw B;
the pump cavity gland is sleeved on the seal cavity seat, a seal cavity seat O ring is arranged between the inner ring surface of the pump cavity gland close to one side of the transmission ring and the outer ring surface of the seal cavity seat, an annular gap is formed between the inner ring surface of the pump cavity gland close to one side of the moving ring and the outer ring surface of the seal cavity seat, and the static ring is arranged in the annular gap; a first static ring O ring is arranged between the outer ring surface of the static ring and the inner ring surface of the pump cavity gland, and a second static ring O ring is arranged between the inner ring surface of the static ring and the outer ring surface of the sealing cavity seat; one ends of the static ring and the dynamic ring opposite to each other are mutually abutted;
a sealing cavity is formed among the static ring, the pump cavity gland, the sealing cavity seat O ring, the first static ring O ring and the second static ring O ring; and the pump cavity gland is provided with an air inlet communicated with the sealing cavity, and the air inlet is connected with an external air source.
2. The springless mechanical seal device according to claim 1, wherein the shaft sleeve is provided with a spigot seat, the rotating ring is mounted in the spigot seat, and one end of the rotating ring, which is away from the transmission ring, is fixedly connected with an upright end surface of the spigot seat through a rotating ring anti-rotation pin.
3. The springless mechanical seal of claim 2, wherein a moving ring O-ring is disposed between an outer annular surface of said moving ring and an inner annular surface of said stop seat.
4. The springless mechanical seal of claim 1, wherein said bushing has a first groove in an inner circumferential surface thereof, said bushing O-ring being seated in said first groove.
5. The springless mechanical seal of claim 1, wherein the inner annular surface of the pump chamber gland has a second groove, and the first stationary O-ring is fixedly attached to the second groove.
6. The springless mechanical seal of claim 1, wherein said seal housing has a third groove and a fourth groove on its outer circumferential surface, said second stationary O-ring is fixedly connected to said third groove, and said seal housing O-ring is fixedly connected to said fourth groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020268719.4U CN211738030U (en) | 2020-03-06 | 2020-03-06 | Spring-free mechanical sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020268719.4U CN211738030U (en) | 2020-03-06 | 2020-03-06 | Spring-free mechanical sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211738030U true CN211738030U (en) | 2020-10-23 |
Family
ID=72858132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020268719.4U Expired - Fee Related CN211738030U (en) | 2020-03-06 | 2020-03-06 | Spring-free mechanical sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211738030U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321384A (en) * | 2021-12-28 | 2022-04-12 | 安徽亚兰密封件股份有限公司 | Mechanical sealing system for solving lubrication |
-
2020
- 2020-03-06 CN CN202020268719.4U patent/CN211738030U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321384A (en) * | 2021-12-28 | 2022-04-12 | 安徽亚兰密封件股份有限公司 | Mechanical sealing system for solving lubrication |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201023 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |