CN113357370A - Magnetic liquid sealing device capable of adjusting number of pole teeth - Google Patents
Magnetic liquid sealing device capable of adjusting number of pole teeth Download PDFInfo
- Publication number
- CN113357370A CN113357370A CN202110793537.8A CN202110793537A CN113357370A CN 113357370 A CN113357370 A CN 113357370A CN 202110793537 A CN202110793537 A CN 202110793537A CN 113357370 A CN113357370 A CN 113357370A
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- Prior art keywords
- ring
- pole shoe
- utmost point
- pole
- shaft
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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
- F16J15/162—Special parts or details relating to lubrication or cooling of the sealing itself
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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
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
- F16J15/43—Sealings between relatively-moving surfaces by means of fluid kept in sealing position by magnetic force
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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
- F16J15/44—Free-space packings
- F16J15/447—Labyrinth packings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
Magnetic liquid sealing device that can adjust utmost point tooth quantity belongs to mechanical engineering and seals the field. The problems that the sealing pressure resistance of the existing magnetic liquid is fixed, cannot be adjusted, and the application range is small are solved. Through processing the pole shoe into the structure that the internal diameter is threaded, with the external screw thread axle sleeve complex mode of different utmost point tooth quantity, provided a magnetic liquid sealing device that can adjust utmost point tooth quantity, the utmost point tooth quantity in the device can be adjusted to change whole withstand voltage ability, make same magnetic liquid seal structure be applicable to more operating modes.
Description
Technical Field
The invention belongs to the field of mechanical engineering sealing, and particularly relates to a magnetic liquid sealing device capable of adjusting the number of pole teeth.
Background
The magnetic liquid seal is a novel sealing mode and has the advantages of zero leakage, no pollution, long service life and the like. However, the number of pole teeth of the existing magnetic liquid sealing structure is fixed, and the pressure resistance value is also fixed. When the pressure resistance required by the sealed machine is increased, the whole seal can be failed, the pressure resistance can be increased only by changing the structure of parts, and the pressure resistance required by the sealing of many machines is not a fixed value. The invention aims to design a magnetic liquid sealing structure capable of changing a pressure resistance value by adjusting the number of pole teeth, so that the same magnetic liquid sealing structure can be applied to working conditions with different pressure resistance value requirements.
Disclosure of Invention
The invention aims to provide a magnetic liquid sealing device capable of adjusting the number of pole teeth, which forms a magnetic liquid sealing structure with different number of pole teeth by matching pole tooth shaft sleeves with pole shoes with different number of pole teeth, so that the same magnetic liquid sealing structure can reach different pressure resistance values, and the problem that the magnetic liquid sealing can only be used for fixing the pressure resistance requirement is solved.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the magnetic liquid seal and labyrinth seal combined sealing device comprises: the magnetic bearing comprises a rotating shaft 1, a left first-shaft retainer ring 2, a left bearing 3, a side rubber ring 4, a left second-shaft retainer ring 5, a left magnetic isolation ring 6, a left pole tooth shaft sleeve 7, a shell 8, a left first rubber ring 9, a left pole shoe 10, a left second rubber ring 11, magnetic liquid 12, a right first rubber ring 13, a cooling water jacket 14, a permanent magnet 15, a right second rubber ring 16, a right pole shoe 17, a right pole tooth shaft sleeve 18, a right magnetic isolation ring 19, a right bearing 20, a threaded end cover 21 and a right shaft retainer ring 22.
Connections between the parts making up the device: the left first shaft check ring 2 is embedded in a first groove on the left side of the rotating shaft 1, and the left second shaft check ring 5 is embedded in a second groove on the left side of the rotating shaft 1; the left bearing 3 is arranged between the left first-shaft retainer ring 2 and the left second-shaft retainer ring 5; the left end face of the left magnetism isolating ring 6 is contacted with the right end face of the outer ring of the left bearing 3; the left rubber ring 9 is embedded in a groove in the outer diameter of the left pole shoe 10, and the right rubber ring 16 is embedded in a groove in the outer diameter of the right pole shoe 17; the left pole tooth shaft sleeve 7 is connected with the left pole shoe 10 through threads, and the right pole tooth shaft sleeve 18 is connected with the right pole shoe 17 through threads; the permanent magnet 15 is arranged between the left pole shoe 10 and the right pole shoe 17; the left rubber ring 11 is embedded in a groove on the left side of the cooling water jacket 14, and the right rubber ring 13 is embedded in a groove on the right side of the cooling water jacket 14; the cooling water jacket 14 is arranged between the left pole shoe 10 and the right pole shoe 17; the left end surface of the right magnetism isolating ring 19 is in contact with the right end surface of the right pole shoe 17; the left end surface of the outer ring of the right bearing 20 is contacted with the right end surface of the right magnetism isolating ring 19; the retainer ring 22 for the right shaft is embedded in the first groove on the right side of the revolving shaft 1; the inner ring of the shell 8 is in contact with the outer rings of the left bearing 3, the left magnetism isolating ring 6, the cooling water jacket 14 of the left pole shoe 10, the right pole shoe 17, the right magnetism isolating ring 19 and the right bearing 20; the threaded end cap 21 is threadedly connected to the housing 8.
The internal diameter right of left side pole shoe 10 is utmost point tooth structure, the left side is thread structure, the internal diameter left side of right pole shoe 17 is utmost point tooth structure, the right is thread structure, the external diameter of left side utmost point tooth axle sleeve 7 and right utmost point tooth axle sleeve 18 is the screw thread, the internal diameter is the utmost point tooth structure the same with the pole shoe, the quantity of utmost point tooth changes according to the demand, when being sealed the required withstand voltage value of machine great, utmost point tooth axle sleeve and the pole shoe cooperation that the utmost point tooth quantity is more, when required withstand voltage value is less, utmost point tooth axle sleeve and the pole shoe cooperation that the utmost point tooth quantity is littleer, and the utmost point tooth quantity of left side utmost point tooth axle sleeve 7 and right utmost point tooth axle sleeve 18 can be different.
A cooling water jacket 14 is arranged between the left pole shoe 10 and the right pole shoe 17, a pipeline for water inlet and outlet is opened at a position corresponding to the shell 8, flowing cooling water is introduced to play a role of cooling the pole shoes, the cooling water jacket 14 is an I-shaped sleeve, two grooves for placing rubber rings are formed in the outer diameter of the sleeve, and the cooling water is prevented from leaking between the cooling water jacket 14 and the shell 8.
The left pole shoe 10, the right pole shoe 17, the left pole tooth shaft sleeve 7, the rotating shaft 1 and the right pole tooth shaft sleeve 18 are made of magnetic conductive materials, and a permanent magnet 15 is added to form a magnetic loop; magnetic liquid 12 is injected between the inner diameter of the pole teeth and the rotating shaft 1; the cooling water jacket 14 is a non-magnetic material.
The invention has the beneficial effects that: 1. the magnetic liquid sealing structure with different pole tooth numbers is formed by changing the structure of the pole shoe, increasing the thread structure of the pole shoe and matching the pole shoe with the pole tooth shaft sleeves with different pole tooth numbers, so that the same magnetic liquid sealing structure can reach different pressure resistance values, waste can not be caused when the pressure resistance value required by a sealed machine is small, and sealing failure can not be caused when the pressure resistance value required is large; 2. a cooling water jacket 14 is added between the two pole shoes, and the temperature of the pole shoes is reduced by introducing circulating cooling water, so that the possibility of sealing failure of the magnetic liquid is reduced; 3. compared with the existing cooling water jackets which are respectively arranged on the left and the right of the two pole shoes, the cooling water jacket 14 has simple structure and convenient installation.
Drawings
FIG. 1 is a magnetic fluid seal assembly with adjustable number of pole teeth;
in fig. 1, a rotating shaft 1, a left first shaft retainer ring 2, a left bearing 3, a side rubber ring 4, a left second shaft retainer ring 5, a left magnetic isolation ring 6, a left tooth shaft sleeve 7, a shell 8, a left first rubber ring 9, a left pole shoe 10, a left second rubber ring 11, magnetic liquid 12, a right first rubber ring 13, a cooling water jacket 14, a permanent magnet 15, a right second rubber ring 16, a right pole shoe 17, a right tooth shaft sleeve 18, a right magnetic isolation ring 19, a right bearing 20, a threaded end cover 21 and a right shaft retainer ring 22;
fig. 2 shows a left pole tooth shaft sleeve 7, a left pole shoe 10, a cooling water jacket 14, a permanent magnet 15, a right pole shoe 17 and a right pole tooth shaft sleeve 18.
Fig. 3 shows the cooling water jacket 14.
Detailed Description
The invention is further illustrated by the following detailed description:
the magnetic liquid seal and labyrinth seal combined sealing device comprises: the magnetic bearing comprises a rotating shaft 1, a left first-shaft retainer ring 2, a left bearing 3, a side rubber ring 4, a left second-shaft retainer ring 5, a left magnetic isolation ring 6, a left pole tooth shaft sleeve 7, a shell 8, a left first rubber ring 9, a left pole shoe 10, a left second rubber ring 11, magnetic liquid 12, a right first rubber ring 13, a cooling water jacket 14, a permanent magnet 15, a right second rubber ring 16, a right pole shoe 17, a right pole tooth shaft sleeve 18, a right magnetic isolation ring 19, a right bearing 20, a threaded end cover 21 and a right shaft retainer ring 22.
Connections between the parts making up the device: the left first shaft check ring 2 is embedded in a first groove on the left side of the rotating shaft 1, and the left second shaft check ring 5 is embedded in a second groove on the left side of the rotating shaft 1; the left bearing 3 is arranged between the left first-shaft retainer ring 2 and the left second-shaft retainer ring 5; the left end face of the left magnetism isolating ring 6 is contacted with the right end face of the outer ring of the left bearing 3; the left rubber ring 9 is embedded in a groove in the outer diameter of the left pole shoe 10, and the right rubber ring 16 is embedded in a groove in the outer diameter of the right pole shoe 17; the left pole tooth shaft sleeve 7 is connected with the left pole shoe 10 through threads, and the right pole tooth shaft sleeve 18 is connected with the right pole shoe 17 through threads; the permanent magnet 15 is arranged between the left pole shoe 10 and the right pole shoe 17; the left rubber ring 11 is embedded in a groove on the left side of the cooling water jacket 14, and the right rubber ring 13 is embedded in a groove on the right side of the cooling water jacket 14; the cooling water jacket 14 is arranged between the left pole shoe 10 and the right pole shoe 17; the left end surface of the right magnetism isolating ring 19 is in contact with the right end surface of the right pole shoe 17; the left end surface of the outer ring of the right bearing 20 is contacted with the right end surface of the right magnetism isolating ring 19; the retainer ring 22 for the right shaft is embedded in the first groove on the right side of the revolving shaft 1; the inner ring of the shell 8 is in contact with the outer rings of the left bearing 3, the left magnetism isolating ring 6, the cooling water jacket 14 of the left pole shoe 10, the right pole shoe 17, the right magnetism isolating ring 19 and the right bearing 20; the threaded end cap 21 is threadedly connected to the housing 8.
The left pole shoe 10, the right pole shoe 17, the left pole tooth shaft sleeve 7, the rotating shaft 1 and the right pole tooth shaft sleeve 18 are made of magnetic conductive materials, and a permanent magnet 15 is added to form a magnetic loop; magnetic liquid 12 is injected between the inner diameter of the pole teeth and the rotating shaft 1; the cooling water jacket 14 is made of a non-magnetic material;
the cooling water jacket 14, the left magnetism isolating ring 7, the right magnetism isolating ring 19 and the shell 8 are made of non-magnetic materials such as stainless steel 304;
the pole shoe, the pole tooth shaft sleeve and the rotating shaft 1 are made of 2Cr13 with good magnetic conductivity;
the permanent magnet 15 is made of neodymium iron boron;
the type of magnetic liquid 12 is selected from magnetic liquids of different base carrier liquids according to the use environment and different sealing media.
Claims (3)
1. Can adjust magnetic fluid sealing device of utmost point tooth quantity, its characterized in that: the device comprises a rotary shaft (1), a left first-shaft retainer ring (2), a left bearing (3), a side rubber ring (4), a left second-shaft retainer ring (5), a left magnetic isolation ring (6), a left pole tooth shaft sleeve (7), a shell (8), a left first rubber ring (9), a left pole shoe (10), a left second rubber ring (11), magnetic liquid (12), a right first rubber ring (13), a cooling water jacket (14), a permanent magnet (15), a right second rubber ring (16), a right pole shoe (17), a right pole tooth shaft sleeve (18), a right magnetic isolation ring (19), a right bearing (20), a threaded end cover (21) and a right shaft retainer ring (22);
connections between the parts making up the device: the left first shaft check ring (2) is embedded in a first groove on the left side of the rotating shaft (1), and the left second shaft check ring (5) is embedded in a second groove on the left side of the rotating shaft (1); the left bearing (3) is arranged between the left first-shaft retainer ring (2) and the left second-shaft retainer ring (5); the left end face of the left magnetism isolating ring (6) is contacted with the right end face of the outer ring of the left bearing (3); the left rubber ring (9) is embedded in a groove in the outer diameter of the left pole shoe (10), and the right rubber ring (16) is embedded in a groove in the outer diameter of the right pole shoe (17); the left pole tooth shaft sleeve (7) is connected with the left pole shoe (10) through threads, and the right pole tooth shaft sleeve (18) is connected with the right pole shoe (17) through threads; the permanent magnet (15) is arranged between the left pole shoe (10) and the right pole shoe (17); the left rubber ring (11) is embedded in a groove on the left side of the cooling water jacket (14), and the right rubber ring (13) is embedded in a groove on the right side of the cooling water jacket (14); the cooling water jacket (14) is arranged between the left pole shoe (10) and the right pole shoe (17); the left end surface of the right magnetism isolating ring (19) is in contact with the right end surface of the right pole shoe (17); the left end surface of the outer ring of the right bearing (20) is contacted with the right end surface of the right magnetism isolating ring (19); the retainer ring (22) for the right shaft is embedded in the first groove on the right side of the rotating shaft (1); the inner ring of the shell (8) is in contact with the left bearing (3), the left magnetism isolating ring (6), the left pole shoe (10), the cooling water jacket (14), the right pole shoe (17), the right magnetism isolating ring (19) and the outer ring of the right bearing (20); the threaded end cover (21) is connected with the shell (8) through threads.
2. The magnetic liquid sealing device capable of adjusting the number of pole teeth according to claim 1, wherein: the internal diameter right of left side pole shoe (10) is utmost point tooth structure, and the left side is thread structure, and the internal diameter left side of right pole shoe (17) is utmost point tooth structure, and the right is thread structure, and the external diameter of left side utmost point tooth axle sleeve (7) and right utmost point tooth axle sleeve (18) is the screw thread, and the internal diameter is the utmost point tooth the same with the pole shoe, and the quantity of utmost point tooth changes according to the demand, and the utmost point tooth quantity of left side utmost point tooth axle sleeve (7) and right utmost point tooth axle sleeve (18) can be different.
3. The magnetic liquid sealing device capable of adjusting the number of pole teeth according to claim 1, wherein: a cooling water jacket (14) is arranged between the left pole shoe (10) and the right pole shoe (17), a pipeline for water inlet and outlet is opened at the corresponding position of the shell (8), flowing cooling water is introduced to play a role of cooling the pole shoes, the cooling water jacket (14) is an I-shaped sleeve, two grooves for placing rubber rings are formed in the outer diameter of the sleeve, and the cooling water is prevented from leaking between the cooling water jacket (14) and the shell (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110793537.8A CN113357370A (en) | 2021-07-14 | 2021-07-14 | Magnetic liquid sealing device capable of adjusting number of pole teeth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110793537.8A CN113357370A (en) | 2021-07-14 | 2021-07-14 | Magnetic liquid sealing device capable of adjusting number of pole teeth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113357370A true CN113357370A (en) | 2021-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110793537.8A Pending CN113357370A (en) | 2021-07-14 | 2021-07-14 | Magnetic liquid sealing device capable of adjusting number of pole teeth |
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| Country | Link |
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| CN (1) | CN113357370A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060192345A1 (en) * | 2003-07-07 | 2006-08-31 | Zhixin Li | Magnetic Fluidic Seal with Improved Pressure Capacity |
| CN200943707Y (en) * | 2006-06-16 | 2007-09-05 | 北京交通大学 | High temperature magnetic liquid seal water-cooling device |
| CN101776151A (en) * | 2010-03-08 | 2010-07-14 | 北京交通大学 | Reciprocating shaft magnetic liquid sealing structure |
| RU2403477C1 (en) * | 2009-05-27 | 2010-11-10 | Государственное образовательное учреждение высшего профессионального образования "Ивановский государственный энергетический университет имени В.И. Ленина" (ИГЭУ) | Magnetic fluid shaft sealing |
| CN102537367A (en) * | 2012-01-12 | 2012-07-04 | 北京理工大学 | Shaft sealing device with magnetic fluids |
| CN206468816U (en) * | 2016-12-28 | 2017-09-05 | 自贡兆强环保科技股份有限公司 | A kind of high-speed centrifugal compressor magnetic fluid seal device |
| CN112431928A (en) * | 2020-11-25 | 2021-03-02 | 清华大学 | Magnetic liquid sealing device |
-
2021
- 2021-07-14 CN CN202110793537.8A patent/CN113357370A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060192345A1 (en) * | 2003-07-07 | 2006-08-31 | Zhixin Li | Magnetic Fluidic Seal with Improved Pressure Capacity |
| CN200943707Y (en) * | 2006-06-16 | 2007-09-05 | 北京交通大学 | High temperature magnetic liquid seal water-cooling device |
| RU2403477C1 (en) * | 2009-05-27 | 2010-11-10 | Государственное образовательное учреждение высшего профессионального образования "Ивановский государственный энергетический университет имени В.И. Ленина" (ИГЭУ) | Magnetic fluid shaft sealing |
| CN101776151A (en) * | 2010-03-08 | 2010-07-14 | 北京交通大学 | Reciprocating shaft magnetic liquid sealing structure |
| CN102537367A (en) * | 2012-01-12 | 2012-07-04 | 北京理工大学 | Shaft sealing device with magnetic fluids |
| CN206468816U (en) * | 2016-12-28 | 2017-09-05 | 自贡兆强环保科技股份有限公司 | A kind of high-speed centrifugal compressor magnetic fluid seal device |
| CN112431928A (en) * | 2020-11-25 | 2021-03-02 | 清华大学 | Magnetic liquid sealing device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210907 |