CN213017715U - Double-end-face mechanical sealing structure - Google Patents
Double-end-face mechanical sealing structure Download PDFInfo
- Publication number
- CN213017715U CN213017715U CN202021789141.3U CN202021789141U CN213017715U CN 213017715 U CN213017715 U CN 213017715U CN 202021789141 U CN202021789141 U CN 202021789141U CN 213017715 U CN213017715 U CN 213017715U
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- ring
- transmission shaft
- rotating ring
- cavity
- mechanical seal
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- 238000007789 sealing Methods 0.000 title claims description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 64
- 238000009434 installation Methods 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims description 21
- 230000003068 static effect Effects 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 4
- 239000000110 cooling liquid Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000012809 cooling fluid Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Mechanical Sealing (AREA)
Abstract
The utility model provides a double mechanical seal structure belongs to mechanical seal technical field, include: transmission shaft, seal receptacle, first rotating ring, second rotating ring, first quiet ring, the quiet ring of second, transmission round pin and pressure strip, the seal receptacle cover is established on the transmission shaft to first installation cavity and second installation cavity have been seted up respectively to the both ends face of seal receptacle, and first quiet ring sets up respectively at first installation cavity with the quiet ring of second and in the second installation cavity, first rotating ring cover is established on the transmission shaft and is connected with first quiet ring, and the second rotating ring cover is established on the transmission shaft and is connected with the quiet ring of second, and transmission round pin one end is worn to establish on the transmission shaft and the other end is worn to establish on first rotating ring, and the pressure strip is fixed on the transmission shaft and compress tightly the second rotating ring. The utility model has the advantages that: the double-end-face mechanical seal is very convenient to assemble, and the structure is compact, so that the size occupied by the mechanical seal is reduced.
Description
Technical Field
The utility model belongs to the technical field of mechanical seal, a double mechanical seal structure is related to.
Background
The mechanical seal is a device for preventing fluid leakage, which is formed by at least one pair of end faces perpendicular to the rotation axis, and the end faces are kept in fit and relatively slide under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism and the cooperation of an auxiliary seal.
However, in the existing mechanical seal, there is a double-end-face mechanical seal structure, that is, two mechanical seals are arranged on the shaft body, but the double-end-face mechanical seal has certain defects in structure, and the moving ring and the stationary ring are relatively troublesome to assemble, and occupy relatively large shaft body length, so that a certain improvement space is provided.
Disclosure of Invention
The utility model aims at the above-mentioned problem that prior art exists, a double mechanical seal structure has been proposed.
The purpose of the utility model can be realized by the following technical proposal: a double mechanical seal structure comprising: transmission shaft, seal receptacle, first rotating ring, second rotating ring, first quiet ring, the quiet ring of second, transmission round pin and pressure strip, the seal receptacle cover is established on the transmission shaft, and first installation cavity and second installation cavity have been seted up respectively to the both ends face of seal receptacle, first quiet ring with the quiet ring of second sets up respectively first installation cavity and in the second installation cavity, first rotating ring cover is established on the transmission shaft and with first quiet ring is connected, the second rotating ring cover is established on the transmission shaft and with the quiet ring of second is connected, transmission round pin one end is worn to establish on the transmission shaft and the other end is worn to establish on the first rotating ring, the pressure strip is fixed on the transmission shaft and compress tightly the second rotating ring.
The preferred, the transmission shaft is the stepped shaft structure, and the transmission shaft includes the primary shaft body and the secondary shaft body, the primary shaft body with secondary shaft body an organic whole connection, the secondary shaft body with the one end of primary shaft body coupling is formed with the ladder face, a plurality of pinholes have been seted up on the ladder face, first rotating ring cover is established on the primary shaft body and with the ladder face is contradicted and is connected, the one end of transmission round pin is worn to establish in the pinhole and the other end is worn to establish thereby make on the first rotating ring with the transmission shaft linkage is connected.
Preferably, a screw is arranged on the compression plate, the compression plate is in abutting connection with the second rotating ring, and the screw penetrates through the compression plate to be connected with the first shaft body, so that the second rotating ring is in linkage connection with the transmission shaft.
Preferably, the seal receptacle is provided with a connecting cavity, a liquid inlet hole and a liquid outlet hole, two ends of the connecting cavity are respectively communicated with the first mounting cavity and the second mounting cavity, and the liquid inlet hole and the liquid outlet hole are communicated with the connecting cavity.
Preferably, a spring is arranged in the connecting cavity and is used for being connected with the first stationary ring or the second stationary ring.
Preferably, stop pins are arranged in the first installation cavity and the second installation cavity, and the two stop pins are respectively connected with the first stationary ring and the second stationary ring.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the double-end-face mechanical seal is very convenient to assemble, and the structure is compact, so that the size occupied by the mechanical seal is reduced.
2. The driving pin is arranged in the pin hole, and the end face of the first movable ring is also provided with a hole, so that the first movable ring can be linked with the transmission shaft through the driving pin, the linkage structure of the first movable ring is optimized, and the double-end-face sealing structure is more compact.
3. The cooling liquid or water flows in from the liquid inlet hole, then flows into the connecting cavity, flows into the first mounting cavity and the second mounting cavity from the connecting cavity, and finally flows out from the liquid outlet hole, so that the purpose of internal circulation cooling is achieved.
Drawings
Fig. 1 is a schematic view of the double mechanical seal structure of the present invention.
Fig. 2 is a schematic structural view of the transmission shaft of the present invention.
In the figure, 100, the transmission shaft; 110. a first shaft body; 120. a second shaft body; 130. a pin hole; 200. a sealing seat; 210. a first mounting cavity; 220. a second mounting cavity; 230. a connecting cavity; 240. a liquid inlet hole; 250. a liquid outlet hole; 260. a spring; 270. a retaining pin; 300. a first rotating ring; 400. a second rotating ring; 500. a first stationary ring; 600. a second stationary ring; 700. a drive pin; 800. a compression plate; 810. and (4) screws.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
As shown in fig. 1 and 2, a double mechanical seal structure includes: the seal structure comprises a transmission shaft 100, a seal seat 200, a first movable ring 300, a second movable ring 400, a first stationary ring 500, a second stationary ring 600, a transmission pin 700 and a pressing plate 800.
Preferably, the transmission shaft 100 is the axis body, and double mechanical seal is exactly the setting on transmission shaft 100, and first rotating ring 300 cooperates with first quiet ring 500 and forms end face seal, and second rotating ring 400 cooperates with second quiet ring 600 and forms end face seal, and two sets of end face seals set up respectively at the both ends of seal receptacle 200.
The seal holder 200 is sleeved on the transmission shaft 100, and a first mounting cavity 210 and a second mounting cavity 220 are respectively formed in two end faces of the seal holder 200, preferably, the seal holder 200 is of a tubular structure and can be sleeved on the transmission shaft 100, the seal holder 200 keeps static relative to the transmission shaft 100, and two ends of the seal holder 200 are sealed with a moving ring through a static ring, so that the transmission shaft 100 is provided with a double-seal structure.
The first stationary ring 500 and the second stationary ring 600 are respectively disposed in the first mounting cavity 210 and the second mounting cavity 220, and it is worth explaining here that the first sealing cavity and the second sealing cavity have substantially the same structure, and both are annular groove structures formed on the end surface of the seal holder 200, and the first stationary ring 500 and the second stationary ring 600 can be inserted into the first mounting cavity 210 and the second mounting cavity 220.
First rotating ring 300 cover is established transmission shaft 100 is last and with first quiet ring 500 is connected, second rotating ring 400 cover is established transmission shaft 100 is last and with second quiet ring 600 is connected, and is preferred, and first rotating ring 300 and second rotating ring 400 are located the both ends of seal receptacle 200 respectively, just so can contradict together with first quiet ring 500 and second quiet ring 600 respectively.
The driving pin 700 has one end penetrating the driving shaft 100 and the other end penetrating the first rotating ring 300, and the pressing plate 800 is fixed on the driving shaft 100 and presses the second rotating ring 400.
Preferably, the first rotating ring 300 and the second rotating ring 400 are sleeved on the transmission shaft 100 and need to be linked with the transmission shaft 100, in order to shorten the axial length of the mechanical seal, so that the overall structure is more compact, particularly, the first rotating ring 300 and the transmission shaft 100 are linked together through the transmission pin 700, the pressing plate 800 is sleeved on the end portion of the transmission shaft 100, and then the second rotating ring 400 is pressed through the pressing plate 800, so that the first rotating ring 300 and the second rotating ring 400 located at different positions on the transmission shaft 100 can be linked with the transmission shaft 100 in the most appropriate transmission manner.
In addition, the structure can ensure that the double-end-face mechanical seal is very convenient to assemble, and during actual assembly, the first movable ring 300, the seal seat 200, the second movable ring 400 and the pressing plate 800 are sequentially arranged, so that the first movable ring 300 can be connected with the transmission pin 700 during axial assembly, the finally arranged second movable ring 400 is directly pressed by the pressing plate 800, and the first static ring 500 and the second static ring 600 are arranged on the seal seat 200 and are arranged on the transmission shaft 100 together.
As shown in fig. 1 and 2, based on the above embodiments, the transmission shaft 100 has a stepped shaft structure, and in short, the mechanical seal is mounted on the transmission shaft 100 to ensure that the transmission shaft 100 can maintain a seal during rotation, and for convenience of explaining the structure of the mechanical seal, the transmission shaft 100 is required to be mentioned here.
The transmission shaft 100 includes a first shaft body 110 and a second shaft body 120, wherein the first shaft body 110 is integrally connected with the second shaft body 120, preferably, the diameter of the first shaft body 110 is smaller than the diameter of the second shaft body 120, and in brief, the first shaft body 110 is thinner, and the second shaft body 120 is thicker.
A stepped surface is formed at one end of the second shaft body 120 connected to the first shaft body 110, and since a stepped structure is formed at the connection between the first shaft body 110 and the second shaft body 120, a part of the annular end surface of the second shaft body 120 is the stepped surface.
The stepped surface is provided with a plurality of pin holes 130, preferably, the pin holes 130 are axially arranged, the number of the pin holes 130 can be multiple, and the pin holes 130 are annularly distributed on the stepped surface.
The first rotating ring 300 is sleeved on the first shaft body 110 and is in abutting connection with the stepped surface, preferably, the first rotating ring 300 is sleeved on the first shaft body 110 and is limited by the stepped surface, that is, when the first rotating ring 300 is in abutting connection with the stepped surface, the first rotating ring 300 is sleeved in the sealing seat 200, and at the moment, the first rotating ring 300 cannot axially move, so that the purpose of locking the axial freedom degree of the first rotating ring 300 is realized through the stepped surface.
One end of the driving pin 700 is inserted into the pin hole 130 and the other end is inserted into the first rotating ring 300 so that the first rotating ring 300 is coupled to the driving shaft 100.
Preferably, the driving pin 700 is disposed in the pin hole 130, and a hole is also disposed on an end surface of the first rotating ring 300, so that the first rotating ring 300 can be linked with the driving shaft 100 through the driving pin 700, thereby optimizing the linkage structure of the first rotating ring 300 and making the double-end-surface sealing structure more compact.
As shown in fig. 1, in addition to the above embodiment, a screw 810 is provided on the pressing plate 800, the pressing plate 800 is connected to the second rotating ring 400 in an abutting manner, and the screw 810 passes through the pressing plate 800 and is connected to the first shaft body 110, so that the second rotating ring 400 is connected to the transmission shaft 100 in an interlocking manner.
Preferably, the second rotating ring 400 is actually close to the end of the first shaft 110, so the pressing plate 800 may be selected to press, specifically, the pressing plate 800 presses the second rotating ring 400, and then is connected to the threaded hole of the first shaft 110 through the screw 810, so that the pressing plate 800 presses the second rotating ring 400 tightly, which both limits the axial freedom degree of the second rotating ring 400 and couples the second rotating ring 400 and the transmission shaft 100 together, and in the actual structure, the mechanical sealing assembly is located between the pressing plate 800 and the stepped surface.
As shown in fig. 1, on the basis of the above embodiment, the sealing seat 200 is provided with a connection cavity 230, a liquid inlet hole 240 and a liquid outlet hole 250, preferably, the connection cavity 230 is located between the first installation cavity 210 and the second installation cavity 220; the liquid inlet 240 and the liquid outlet 250 are both holes formed on the periphery of the sealing seat 200.
Two ends of the connection cavity 230 are respectively communicated with the first installation cavity 210 and the second installation cavity 220, and the liquid inlet hole 240 and the liquid outlet hole 250 are both communicated with the connection cavity 230.
Preferably, the connection cavity 230, the first mounting cavity 210 and the second mounting cavity 220 are communicated, and in an actual structure, the movable ring and the stationary ring generate heat due to friction during operation, so that cooling is needed.
In addition, the number of the connection chambers 230 may be plural, and the cooling fluid or water may enter the first connection chamber 230 from the fluid inlet hole 240, then enter the first mounting chamber 210 and the second mounting chamber 220, and then flow into the other connection chamber 230 from the first mounting chamber 210 and the second mounting chamber 220.
When the mechanical seal is cooled, the cooling liquid or water flows in from the liquid inlet hole 240, then flows into the connecting cavity 230, flows into the first mounting cavity 210 and the second mounting cavity 220 from the connecting cavity 230, and finally flows out from the liquid outlet hole 250, so as to achieve the purpose of internal circulation cooling, and it should be noted here that, in addition to cooling the moving ring and the stationary ring, the crystals in the seal holder 200 can be washed away, specifically, with the use of the mechanical seal, the crystals or impurities are generated in the seal holder 200, and after the cooling liquid or water is introduced, the crystals or impurities in the seal holder 200 can be washed away from the liquid outlet hole 250 by washing the first mounting cavity 210, the second mounting cavity 220, and the connecting cavity 230.
As shown in fig. 1, in the above embodiment, a spring 260 is disposed in the connecting chamber 230, and the spring 260 is connected to the first stationary ring 500 or the second stationary ring 600.
Preferably, the first stationary ring 500 can be pushed toward the first moving ring 300 or the second stationary ring 600 can be pushed toward the second moving ring 400 by the spring 260, so that the stationary ring is elastically compensated, the stationary ring and the moving ring can be reliably sealed together, and the flow of the cooling fluid in the connecting chamber 230 is not hindered.
Specifically, the connecting cavity 230 may be provided in a stepped hole structure, and at least two connecting cavities 230 are provided, and both ends of each connecting cavity 230 are connected to the first mounting cavity 210 and the second mounting cavity 220, respectively, the spring 260 in one connecting cavity 230 is connected to the first stationary ring 500, and the spring 260 in the other connecting cavity 230 is connected to the second stationary ring 600.
As shown in fig. 1, on the basis of the above embodiment, stop pins 270 are disposed in the first installation cavity 210 and the second installation cavity 220, and the two stop pins 270 are respectively connected to the first stationary ring 500 and the second stationary ring 600.
Preferably, the first stationary ring 500 and the second stationary ring 600 can be kept stationary by the stopper pin 270.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (6)
1. A double mechanical seal structure, comprising: transmission shaft, seal receptacle, first rotating ring, second rotating ring, first quiet ring, the quiet ring of second, transmission round pin and pressure strip, the seal receptacle cover is established on the transmission shaft, and first installation cavity and second installation cavity have been seted up respectively to the both ends face of seal receptacle, first quiet ring with the quiet ring of second sets up respectively first installation cavity and in the second installation cavity, first rotating ring cover is established on the transmission shaft and with first quiet ring is connected, the second rotating ring cover is established on the transmission shaft and with the quiet ring of second is connected, transmission round pin one end is worn to establish on the transmission shaft and the other end is worn to establish on the first rotating ring, the pressure strip is fixed on the transmission shaft and compress tightly the second rotating ring.
2. A double mechanical seal according to claim 1, wherein: the transmission shaft is the stepped shaft structure, and the transmission shaft includes the primary shaft body and the secondary shaft body, the primary shaft body with the secondary shaft body coupling, the secondary shaft body with the one end of primary shaft body coupling is formed with the ladder face, a plurality of pinholes have been seted up on the ladder face, first rotating ring cover is established on the primary shaft body and with the ladder face is contradicted and is connected, the one end of transmission round pin is worn to establish in the pinhole and the other end is worn to establish thereby make on the first rotating ring with the transmission shaft linkage is connected.
3. A double mechanical seal according to claim 2, wherein: the pressing plate is provided with a screw, the pressing plate is in abutting connection with the second movable ring, and the screw penetrates through the pressing plate and is connected with the first shaft body so that the second movable ring is in linkage connection with the transmission shaft.
4. A double mechanical seal according to claim 1, wherein: the sealing seat is provided with a connecting cavity, a liquid inlet hole and a liquid outlet hole, the two ends of the connecting cavity are communicated with the first mounting cavity and the second mounting cavity respectively, and the liquid inlet hole and the liquid outlet hole are communicated with the connecting cavity.
5. A double mechanical seal according to claim 4, wherein: and a spring is arranged in the connecting cavity and is used for being connected with the first static ring or the second static ring.
6. A double mechanical seal according to claim 1, wherein: and the first mounting cavity and the second mounting cavity are internally provided with stop pins, and the two stop pins are respectively connected with the first stationary ring and the second stationary ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021789141.3U CN213017715U (en) | 2020-08-24 | 2020-08-24 | Double-end-face mechanical sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021789141.3U CN213017715U (en) | 2020-08-24 | 2020-08-24 | Double-end-face mechanical sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213017715U true CN213017715U (en) | 2021-04-20 |
Family
ID=75470669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021789141.3U Active CN213017715U (en) | 2020-08-24 | 2020-08-24 | Double-end-face mechanical sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213017715U (en) |
-
2020
- 2020-08-24 CN CN202021789141.3U patent/CN213017715U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Ningbo Chuangwei Machinery Co.,Ltd. Assignor: NINGBO DONGLIAN MECHANICAL SEAL Co.,Ltd. Contract record no.: X2023980053451 Denomination of utility model: A Double End Face Mechanical Seal Structure Granted publication date: 20210420 License type: Common License Record date: 20231221 |
|
| EE01 | Entry into force of recordation of patent licensing contract |