CN204004434U - With the water-cooled magnetic fluid seal device of swivel joint - Google Patents
With the water-cooled magnetic fluid seal device of swivel joint Download PDFInfo
- Publication number
- CN204004434U CN204004434U CN201420436277.4U CN201420436277U CN204004434U CN 204004434 U CN204004434 U CN 204004434U CN 201420436277 U CN201420436277 U CN 201420436277U CN 204004434 U CN204004434 U CN 204004434U
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- Prior art keywords
- rotary joint
- sealing ring
- pole shoe
- end cover
- magnetic liquid
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
With the water-cooled magnetic fluid seal device of swivel joint, belong to sealing field of mechanical engineering.Successfully solved existing magnetic fluid seal device on-line velocity 20m/s when above, in seal clearance, magnetic liquid heating value is large, shortens the problem even losing efficacy working life.This device is combined by magnetic fluid sealing assembly and swivel joint.This device passes through at the upper open cycle tank (20) of rotating shaft (22), avoid because of the impact of the tank degree of depth on magnetic circuit, thereby reduce conducting path, by adopting water-cooling pattern, cooling cycle efficiency is far above air cooling mode, and this device can be guaranteed the cooling of each utmost point tooth magnetic liquid simultaneously.
Description
Technical field
The invention belongs to sealing field of mechanical engineering.
Background technique
Magnetic fluid sealing is applied in the sealed environment of major diameter, high linear speed, and the magnetic liquid in seal clearance often lost efficacy because of excess Temperature, and in the world, the cooling of major diameter, high linear speed operating mode magnetic hydraulic seal is also a difficult problem always.Therefore the improvement of the cooling-cycle device to magnetic fluid sealing is most important with research and development, directly affects the working life of magnetic fluid seal device.
The present type of cooling the most widely has the type of cooling of process water cold trap in pole shoe, as described in documents 1 (publication number is the patent of CN 103574041A); There is the type of cooling that water jacket is installed at pole shoe excircle, as described in documents 2 (publication number is the patent of CN 200943707Y); Have and heat-conducting property good metal is installed in pole shoe both sides is carried out cooling mode, device as described in 524 pages of documents 3 " magnetic liquid theoretical and application "; Utilize in addition the self cooling mode of the blade rotation on shell, as described in documents 4 (patent No. is the patent of US 7338049B2).But all there is the problem that cooling effect is poor, heat dissipation potential is low in the cooling unit described in above document.
Seal arrangement as described in documents 1 (publication number is the patent of CN 103574041A), its cooling bath is processed in pole shoe, this device has three place's shortcomings: first, thereby reduce magnetic liquid voltage endurance capability in order not affect magnetic circuit distribution, cooling bath is conventionally far away apart from seal clearance, and heat conduction path is larger, and radiating efficiency is low, when linear velocity is during higher than 20m/s, its cooling effect will significantly reduce; The second, if in order to improve radiating efficiency, and the distance of dwindling cooling bath and seal clearance, sealing voltage endurance capability will significantly reduce, and does not possess practicability; The 3rd, cooling bath leaves in pole shoe, and the material of pole shoe is generally magnetic conductive metal, is generally stainless steel material, and thermal conductivity ratio gold, silver, copper and the aluminium of steel are much lower, and therefore heat-conducting effect is limited.
The seal arrangement that documents 2 (publication number is the patent of CN 200943707Y) is described, its cooling principle is identical with documents 1, but its cooling effect is even not as good as the seal arrangement described in documents 1.
Seal arrangement described in documents 3 is installed the good slug of heat-conducting property in pole shoe both sides, its heat-conductive characteristic obviously improves, but do not there is circulating cooling system, in the long playing situation of seal arrangement, its cooling effect is not good, when linear velocity is higher than 20m/s, after stream time exceedes 5h, its cooling effect will significantly decline; Secondly, this Heat Conduction Material is arranged on pole shoe side, cannot carry out the magnetic liquid in the seal clearance near magnet place coolingly, in the time that linear velocity is higher, magnetic liquid herein is early lost efficacy, and causes sealing voltage endurance capability and reduces even and lost efficacy.
The seal arrangement that documents 4 (patent No. is the patent of US 7338049B2) is described, its heat conduction that utilizes Sealing self to rotate to increase with ambient gas is carried out cooling, because ambient gas temperature is uncontrollable, heat conduction path is very long, therefore cooling effect is very limited, can only be applicable to the working environment that linear velocity is lower, the diameter of axle is less, not there is practicability.
Summary of the invention
The technical issues that need to address of the present invention are, when existing magnetic liquid rotating sealing device is worked under the environment of major diameter, high linear speed, because magnetic liquid heating value in seal clearance is large, easily to cause sealing shortening even working life and lost efficacy.Therefore a kind of water-cooled magnetic fluid seal device with swivel joint is provided.
The technical solution adopted for the present invention to solve the technical problems is:
With the water-cooled magnetic fluid seal device of swivel joint, form this device and comprise:
Shell, left pole shoe, permanent magnet, right pole shoe, screw, the first end cap, seal ring, the second end cap, swivel joint shell, liquid outlet channel, jump ring, the 3rd end cap, right water-sealed bearing, liquid outlet opening, inlet opening, left water-sealed bearing, swivel joint rotating shaft, feed pathway, right seal ring, circulation water channel, left seal ring, rotating shaft;
Form the connection between the each several part of this device:
Described left seal ring is arranged in the groove on left pole shoe cylindrical, forms the left pole shoe with seal ring, and right seal ring is arranged in the groove on right pole shoe cylindrical, forms the right pole shoe with seal ring;
By the left pole shoe with seal ring, permanent magnet, pack in shell endoporus with the right pole shoe order of seal ring; The first end cap and shell are fixed with being threaded on shell end face by screw, made the each part axial of enclosure location; Left pole shoe with seal ring, permanent magnet, the right pole shoe with seal ring, the first end cap are inserted in to rotating shaft together with shell, by being threaded shell axially locating on shell flange plate, form magnetic fluid sealing assembly; In assembling process, after permanent magnet is installed, in the endoporus of permanent magnet, inject magnetic liquid;
By a left side, right water-sealed bearing is arranged on respectively a left side for swivel joint shell endoporus boss, right two end faces, by being fixedly connected with the left side that the second end cap is arranged on to swivel joint shell, pack swivel joint rotating shaft into a left side, right water-sealed bearing, in the endoporus that swivel joint shell and the second end cap form, jump ring is arranged on to the right side of right water-sealed bearing, make the each part axial of swivel joint enclosure location, by being fixedly connected with, the 3rd end cap is arranged on to swivel joint shell right side, seal ring is arranged in the sealed groove of swivel joint rotating shaft end face of flange, form rotary joint assembly,
By being fixedly connected with, rotary joint assembly is connected with magnetic fluid sealing assembly.
It is characterized in that:
By the water-cooled magnetic fluid seal device with swivel joint that is combined to form of magnetic fluid sealing assembly and rotary joint assembly, rotating shaft is processed with the circulation water channel that the degree of depth exceedes left pole shoe left side.
The present invention compares had beneficial effect with prior art:
Due to boiling water groove in rotating shaft, avoid because of the impact of the tank degree of depth on magnetic circuit, thereby reduce conducting path, by adopting water-cooling pattern, cooling cycle efficiency is far above air cooling mode, and this device can be guaranteed the cooling of each utmost point tooth magnetic liquid simultaneously, thereby has successfully solved existing magnetic fluid seal device on-line velocity 20m/s when above, in seal clearance, magnetic liquid heating value is large, shortens the problem even losing efficacy working life.
Brief description of the drawings
The water-cooled magnetic fluid seal device of Fig. 1 band swivel joint;
In Fig. 1: shell (1), left pole shoe (2), permanent magnet (3), right pole shoe (4), screw (5), the first end cap (6), seal ring (7), the second end cap (8), swivel joint shell (9), liquid outlet channel (10), jump ring (11), the 3rd end cap (12), right water-sealed bearing (13), liquid outlet opening (14), inlet opening (15), left water-sealed bearing (16), swivel joint rotating shaft (17), feed pathway (18), right seal ring (19), circulation water channel (20), left seal ring (21), rotating shaft (22).
Embodiment
Taking accompanying drawing as embodiment, the invention will be further described:
With the water-cooled magnetic fluid seal device of swivel joint, as Fig. 1, sealing device comprises: shell 1, left pole shoe 2, permanent magnet 3, right pole shoe 4, screw 5, the first end cap 6, seal ring 7, the second end cap 8, swivel joint shell 9, liquid outlet channel 10, jump ring 11, the 3rd end cap 12, right water-sealed bearing 13, liquid outlet opening 14, inlet opening 15, left water-sealed bearing 16, swivel joint rotating shaft 17, feed pathway 18, right seal ring 19, circulation water channel 20, left seal ring 21, rotating shaft 22.
Form the connection between the each several part of this device:
Described left seal ring 21 is arranged in the groove on left pole shoe 2 cylindricals, forms the left pole shoe with seal ring, and right seal ring 19 is arranged in the groove on right pole shoe 4 cylindricals, forms the right pole shoe with seal ring;
By the left pole shoe with seal ring, permanent magnet 3, pack in shell 1 endoporus with the right pole shoe order of seal ring; The first end cap 6 and shell 1 are fixed with being threaded on shell 1 end face by screw 5, made the inner each part axial of shell 1 location; Left pole shoe with seal ring, permanent magnet 3, the right pole shoe with seal ring, the first end cap 6 are inserted in to rotating shaft 22 together with shell 1, by being threaded shell 1 axially locating on shell 1 flange plate, form magnetic fluid sealing assembly; In assembling process, after permanent magnet 3 is installed, in the endoporus of permanent magnet 3, inject magnetic liquid;
By a left side, right water-sealed bearing is arranged on respectively a left side for swivel joint shell 9 endoporus boss, right two end faces, by being fixedly connected with the left side that the second end cap 8 is arranged on to swivel joint shell 9, pack swivel joint rotating shaft 17 into a left side, right water-sealed bearing, in the endoporus that swivel joint shell 9 and the second end cap 8 form, jump ring 11 is arranged on to the right side of right water-sealed bearing 13, make the inner each part axial of swivel joint shell 9 location, by being fixedly connected with, the 3rd end cap 12 is arranged on to swivel joint shell 9 right sides, seal ring 7 is arranged in the sealed groove of swivel joint rotating shaft 17 end face of flange, form rotary joint assembly,
By being fixedly connected with, rotary joint assembly is connected with magnetic fluid sealing assembly.
Cooling water enters the feed pathway 18 swivel joint rotating shaft 17 by water pump from the inlet opening 15 of rotary joint assembly, realizes quiet, moving conversion, then flows in the circulation water channel 20 of rotating shaft 22, takes away the heat that in seal clearance, magnetic liquid produces; Hot water enters liquid outlet channel 10 in circulation water channel 20, thereby flows in external refrigeration equipment along the liquid outlet opening 14 of rotary joint assembly, realizes dynamic and static conversion, finally realizes the circulation of cooling water by outside water pump.
The material that magnetic property is good is selected in left and right pole shoe, rotating shaft 22, as electrical pure iron;
Permanent magnet 3 is selected rubidium iron boron;
The kind of magnetic liquid is according to the magnetic liquid of the different base fluids of the different choice of sealing gas.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420436277.4U CN204004434U (en) | 2014-08-04 | 2014-08-04 | With the water-cooled magnetic fluid seal device of swivel joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420436277.4U CN204004434U (en) | 2014-08-04 | 2014-08-04 | With the water-cooled magnetic fluid seal device of swivel joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204004434U true CN204004434U (en) | 2014-12-10 |
Family
ID=52044437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420436277.4U Expired - Fee Related CN204004434U (en) | 2014-08-04 | 2014-08-04 | With the water-cooled magnetic fluid seal device of swivel joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204004434U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110939739A (en) * | 2019-12-16 | 2020-03-31 | 清华大学 | Magnetic powder and magnetic liquid combined sealing device |
| CN114370508A (en) * | 2021-12-23 | 2022-04-19 | 清华大学 | Magnetic liquid seal with cooling system |
-
2014
- 2014-08-04 CN CN201420436277.4U patent/CN204004434U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110939739A (en) * | 2019-12-16 | 2020-03-31 | 清华大学 | Magnetic powder and magnetic liquid combined sealing device |
| CN110939739B (en) * | 2019-12-16 | 2020-08-21 | 清华大学 | Magnetic powder and magnetic liquid combined sealing device |
| CN114370508A (en) * | 2021-12-23 | 2022-04-19 | 清华大学 | Magnetic liquid seal with cooling system |
| CN114370508B (en) * | 2021-12-23 | 2023-02-21 | 清华大学 | Magnetic fluid seal with cooling system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20200804 |