CN113669459A - Magnetic liquid sealing device for reducing starting torque - Google Patents
Magnetic liquid sealing device for reducing starting torque Download PDFInfo
- Publication number
- CN113669459A CN113669459A CN202110821277.0A CN202110821277A CN113669459A CN 113669459 A CN113669459 A CN 113669459A CN 202110821277 A CN202110821277 A CN 202110821277A CN 113669459 A CN113669459 A CN 113669459A
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- shaft
- shaft sleeve
- magnetic liquid
- sleeve
- magnetic fluid
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Classifications
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
Abstract
The invention discloses a magnetic liquid sealing device for reducing starting torque, which comprises a shell, a magnetic liquid sealing assembly, a shaft sleeve, a shaft and a friction increasing piece, wherein the magnetic liquid sealing assembly is arranged in the shell and is provided with a through hole, at least part of the shaft sleeve is matched in the through hole, the shaft sleeve can rotate in the through hole, a first annular gap is formed between the outer peripheral wall of the shaft sleeve and the inner peripheral wall of the through hole and is used for filling magnetic liquid, at least part of the shaft is matched in the shaft sleeve in a rotating mode, a second annular gap is formed between the outer peripheral wall of the shaft and the inner peripheral wall of the shaft sleeve, the friction increasing piece is arranged in the second annular gap and is used for increasing the friction between the shaft and the shaft sleeve when the shaft sleeve rotates, so as to heat the magnetic liquid in a friction mode. The magnetic liquid sealing device for reducing the starting torque has the advantages of simple structure, convenience in use, low starting torque and the like.
Description
Technical Field
The invention belongs to the technical field of mechanical engineering sealing, and particularly relates to a magnetic liquid sealing device for reducing starting torque.
Background
Magnetic liquid seals are widely used because of their advantages of zero leakage, long life, high reliability, etc.
In the related art, in some cases where the temperature is low, the viscosity of the magnetic liquid increases, so that the starting torque of the magnetic liquid sealing device increases. The torque of the magnetic liquid sealing device with the torque of 1.6 kg.m at normal temperature can reach 7 kg.m at minus 40 ℃, and the service performance of the sealing device is seriously influenced.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides a magnetic liquid sealing device which is simple in structure, convenient to start and capable of reducing the starting torque.
The magnetic liquid sealing device for reducing the starting torque comprises the following components: a housing; the magnetic liquid sealing assembly is arranged in the shell and provided with a through hole; the shaft sleeve is at least partially matched in the through hole and can rotate in the through hole, a first annular gap is formed between the outer peripheral wall of the shaft sleeve and the inner peripheral wall of the through hole, and the first annular gap is used for filling magnetic liquid; a shaft, at least a portion of which is rotationally fitted within the sleeve, a second annular gap being formed between an outer peripheral wall of the shaft and an inner peripheral wall of the sleeve; the friction increasing piece is arranged in the second annular gap and used for increasing the friction effect between the shaft and the shaft sleeve when the shaft rotates relative to the shaft sleeve so as to frictionally heat the magnetic liquid.
According to the magnetic liquid sealing device capable of reducing the starting torque, the friction piece is arranged, so that heat is generated by friction between the friction piece and the shaft and between the friction piece and the shaft sleeve, the starting torque of the magnetic liquid sealing device is reduced, and the sealing performance of the magnetic liquid sealing device is guaranteed.
In some embodiments, the friction enhancer and the magnetic fluid seal assembly are disposed diametrically opposite the shaft.
In some embodiments, at least one of the inner peripheral surface of the sleeve or the outer peripheral surface of the shaft is provided with a groove extending in the circumferential direction of the shaft, and the second annular gap is formed in the groove.
In some embodiments, one end of the groove extends along the axial direction of the shaft and penetrates through the shaft or the shaft sleeve, the starting torque reducing magnetic liquid sealing device further comprises an end cover, the end cover is sleeved on the outer circumferential surface of the shaft, and the friction increasing piece is arranged between the end cover and the groove so that the end cover presses the friction increasing piece.
In some embodiments, the friction enhancer comprises: a rope body; and the metal foil tape is wound on the outer peripheral side of the rope body.
In some embodiments, the rope body is an asbestos rope, and the cross-sectional shape of the asbestos rope is rectangular.
In some embodiments, the metal foil strip is made of any one of aluminum, lead or tin.
In some embodiments, the magnetic fluid sealing device for reducing the starting torque further includes a first magnetism isolating ring and a second magnetism isolating ring, the first magnetism isolating ring and the second magnetism isolating ring surround the shaft sleeve and are located in the shell, the first magnetism isolating ring and the second magnetism isolating ring are arranged at intervals along the axial direction of the shaft, and the magnetic fluid sealing device is located between the first magnetism isolating ring and the second magnetism isolating ring.
In some embodiments, the magnetic liquid seal assembly comprises: the pole shoes are arranged in the shell, the shaft sleeve is sleeved with the pole shoes, the inner circumferential surfaces of the pole shoes and the outer circumferential surface of the shaft sleeve are arranged at intervals along the radial direction of the shaft, and magnetic liquid is filled in the inner circumferential surfaces of the pole shoes and the outer circumferential surface of the shaft sleeve; the permanent magnet is arranged in the shell and surrounds the outer periphery of the shaft, and the permanent magnet is positioned between the adjacent pole shoes.
In some embodiments, the starting torque reducing magnetic liquid sealing device further comprises a sealing element, an annular groove is formed in at least one of the outer peripheral surface of the shaft or the inner peripheral surface of the shaft sleeve, the sealing element is fitted in the annular groove, and the outer peripheral surface of the sealing element is attached to the inner peripheral surface of the shaft sleeve.
Drawings
Fig. 1 is a schematic structural diagram of a magnetic fluid sealing device for reducing an actuating torque according to an embodiment of the present invention.
A magnetic liquid sealing device 100;
a housing 1; a magnetic liquid seal assembly 2; a pole piece 21; a permanent magnet 22; a shaft sleeve 3; a second annular gap 31; a shaft 4; a first annular gap 41; a friction increasing member 5; an end cap 6; a first magnetism isolating ring 7; a second magnetism isolating ring 8; a first bearing 9; a second bearing 10; a seal 101.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A starting torque reducing magnetic fluid seal apparatus according to an embodiment of the present invention will be described with reference to fig. 1.
As shown in fig. 1, the magnetic fluid sealing apparatus for reducing an actuating torque according to an embodiment of the present invention includes a housing 1, a magnetic fluid sealing assembly 2, a shaft sleeve 3, a shaft 4, and a friction increasing member 5.
The magnetic liquid sealing component 2 is arranged in the shell 1, and the magnetic liquid sealing component 2 is provided with a through hole. Specifically, the magnetic liquid seal assembly 2 is arranged in the housing 1, the outer peripheral surface of the magnetic liquid seal assembly 2 is attached to the inner peripheral surface of the housing 1, and the magnetic liquid seal assembly 2 has a through hole penetrating through the magnetic liquid seal assembly 2 in the left-right direction.
At least a part of the sleeve 3 is fitted in the through hole, the sleeve 3 is rotatable in the through hole, a first annular gap 41 is formed between the outer peripheral wall of the sleeve 3 and the inner peripheral wall of the through hole, and the first annular gap 41 is used for filling magnetic liquid. Specifically, as shown in fig. 1, the shaft sleeve 3 is inserted into the through hole of the magnetic liquid sealing assembly 2, and the shaft sleeve 3 can rotate in the through hole, the outer circumferential surface of the shaft sleeve 3 and the inner circumferential surface of the through hole are spaced to form a first annular gap 41, so that the magnetic liquid is filled in the first annular gap 41, and one end of the shaft sleeve 3 is connected to an output shaft 4 of a first motor (not shown in the figure), and the shaft sleeve 3 is driven by the first motor to rotate.
At least part of the shaft 4 is rotatably fitted in the sleeve 3, a second annular gap 31 being formed between the outer peripheral wall of the shaft 4 and the inner peripheral wall of the sleeve 3. Specifically, as shown in fig. 1, the shaft 4 is rotatably inserted into the shaft sleeve 3, an inner circumferential surface of the shaft sleeve 3 and an outer circumferential surface of the shaft 4 are spaced apart in a radial direction of the shaft 4 to form a second annular gap 31, and one end of the shaft 4 is connected to an output shaft 4 of a second motor (not shown in the figure) through which the shaft 4 is driven to rotate.
A friction increasing member 5 is provided in the second annular gap 31, the friction increasing member 5 being adapted to increase a friction between the shaft 4 and the sleeve 3 to frictionally heat the magnetic liquid when the shaft 4 rotates relative to the sleeve 3. Specifically, the friction increasing member 5 is disposed in the second annular gap 31, the outer circumferential surface of the friction increasing member 5 is in contact with the shaft sleeve 3, the inner circumferential surface of the friction increasing member 5 is in contact with the shaft 4, and when the shaft 4 and the shaft sleeve 3 rotate, the friction increasing member 5 can rotate in the second annular gap 31, so that the friction between the friction increasing member 5 and the shaft 4 and the shaft sleeve 3 generates heat.
According to the magnetic liquid sealing device 100 for reducing the starting torque, the friction increasing piece 5 is arranged in the second annular gap 31, when the temperature is low, the first motor is started to enable the shaft 4 to rotate in the shaft sleeve 3, so that the friction increasing piece 5 is driven to rotate in the first annular gap 41, the friction increasing piece 5, the shaft 4 and the shaft sleeve 3 generate heat through friction, the generated heat is conducted to the magnetic liquid through the shaft sleeve 3, the magnetic liquid of the magnetic liquid sealing assembly 2 is heated, the viscosity of the magnetic liquid is reduced, the second motor is started and the first motor is turned off, the shaft sleeve 3 rotates in the through hole of the magnetic liquid sealing assembly 2, and therefore the starting torque of the magnetic liquid sealing device 100 is reduced.
In some embodiments, at least one of the inner peripheral surface of the sleeve 3 or the outer peripheral surface of the shaft 4 is provided with a groove extending in the circumferential direction of the shaft 4, and the second annular gap 31 is formed in the groove. Specifically, as shown in fig. 1, the inner peripheral surface of the boss 3 is provided with a groove extending in the circumferential direction of the shaft 4, and a second annular gap 31 is formed between the inner peripheral surface of the groove and the outer peripheral surface of the shaft 4, whereby the friction increasing member 5 is fitted in the second annular gap 31.
In some embodiments, one end of the groove extends along the axial direction of the shaft 4 and penetrates through the shaft 4 or the shaft sleeve 3, the magnetic fluid sealing device 100 for reducing the starting torque further comprises an end cover 6, the end cover 6 is sleeved on the outer circumferential surface of the shaft 4, and the friction increasing piece 5 is arranged between the end cover 6 and the groove, so that the end cover 6 compresses the friction increasing piece 5. Specifically, as shown in fig. 1, the left end of the groove penetrates through the shaft sleeve 3 in the left-right direction, the friction increasing piece 5 is arranged in the groove, the right end of the friction increasing piece 5 abuts against the right end of the groove, the end cover 6 is arranged at the left end of the friction increasing piece 5, and the inner circumferential surface of the end cover 6 is in interference fit with the outer circumferential surface of the shaft 4. Thereby, the friction increasing piece 5 is installed between the groove and the end cover 6, and the friction increasing piece 5 is prevented from moving left and right.
In some embodiments, the friction enhancer 5 includes a rope (not shown) and a metal foil tape (not shown).
The metal foil tape is wound on the outer periphery side of the rope body. Specifically, the rope body is wound around the outer peripheral side of the sleeve 3, and the metal foil tape is wrapped on the rope body. From this, not only conveniently increase the installation of piece 5 that rubs, the metal foil area can improve the heat that increases the friction production between piece 5 and axle 4 and the axle sleeve 3 moreover, also can improve the life who increases piece 5 that rubs to it sets up more rationally to make to increase piece 5.
In some embodiments, the rope body is an asbestos rope, and the cross-sectional shape of the asbestos rope is rectangular. Because the tensile strength of asbestos rope is higher, has good heat resistance and insulating properties, from this, select for use the asbestos rope to improve the life who increases piece 5 that rubs, in addition, the cross sectional shape of asbestos rope is the rectangle, when increasing piece 5 winding on axle 4 that rubs, can prevent to increase and have the clearance between the piece 5, increases the area of contact between piece 5 and axle 4 and the axle sleeve 3 that rubs greatly, has improved friction efficiency and themogenesis efficiency.
In some embodiments, the metal foil strip is made of any one of aluminum, lead or tin. Because aluminum, lead or tin has good ductility, the metal foil strip can be conveniently arranged on the asbestos rope.
It is understood that the structure of the friction increasing member 5 is not limited thereto, and the friction increasing member 5 may be a friction plate, a friction ring, or the like.
In some embodiments, the magnetic fluid sealing device 100 for reducing the starting torque further includes a first magnetism isolating ring 7 and a second magnetism isolating ring 8, the first magnetism isolating ring 7 and the second magnetism isolating ring 8 surround the shaft sleeve 3 and are located in the shell 1, the first magnetism isolating ring 7 and the second magnetism isolating ring 8 are arranged at intervals along the axial direction of the shaft 4, and the magnetic fluid sealing device 100 is located between the first magnetism isolating ring 7 and the second magnetism isolating ring 8.
Specifically, as shown in fig. 1, the first magnetism isolating ring 7 and the second magnetism isolating ring 8 are arranged on the shaft sleeve 3 in a penetrating manner, and the outer peripheral surfaces of the first magnetism isolating ring 7 and the second magnetism isolating ring 8 are attached to the inner peripheral surface of the housing 1, so that the first magnetism isolating ring 7 and the second magnetism isolating ring 8 are positioned, and the first magnetism isolating ring 7 and the second magnetism isolating ring 8 are prevented from moving in the housing 1 along the radial direction of the shaft 4 to damage parts in the housing 1 or generate noise. The inner peripheral surface of the first magnetism isolating ring 7 and the inner peripheral surface of the second magnetism isolating ring 8 are spaced from the outer peripheral surface of the shaft sleeve 3, so that the installation of the magnetism isolating ring 5 is convenient. The first magnetism isolating ring 7 and the second magnetism isolating ring 8 have the capacity of blocking a magnetic field, so that magnetic lines of force of the magnetic liquid sealing unit are prevented from losing.
In some embodiments, the magnetic fluid sealing device 100 for reducing the starting torque further comprises a first bearing 9 and a second bearing 10, the first bearing 9 and the second bearing 10 are arranged in the housing 1 and are mounted on the shaft sleeve 3, the first bearing 9 and the second bearing 10 are arranged at intervals in the axial direction of the shaft 4, the first bearing 9 and the second bearing 10 are arranged on two sides of the first magnetism isolating ring 7 and the second magnetism isolating ring 8 or the first bearing 9 and the second bearing 10 are arranged on the same side of the first magnetism isolating ring 7 or the second magnetism isolating ring 8.
Specifically, as shown in fig. 1, the first bearing 9 and the second bearing 10 are disposed on the shaft sleeve 3 in a penetrating manner, and are disposed on the left side of the first magnetism isolating ring 7, the inner ring of the first bearing 9 and the inner ring of the second bearing 10 are both in interference fit with the shaft sleeve 3, the outer rings of the first bearing 9 and the second bearing 10 are both in clearance fit or transition fit with the inner circumferential surface of the housing 1, which not only can ensure smooth rotation of the shaft sleeve 3 in the housing 1, but also can facilitate the first bearing 9 and the second bearing 10 to be taken out from the housing 1 along with the shaft sleeve 3 when parts in the housing 1 need to be overhauled.
In some embodiments, the magnetic liquid seal assembly 2 comprises: a plurality of pole shoes 21 and permanent magnets 22
The plurality of pole shoes 21 are arranged in the shell 1, the plurality of pole shoes 21 are sleeved on the shaft sleeve 3, the inner circumferential surfaces of the plurality of pole shoes 21 and the outer circumferential surface of the shaft sleeve 3 are arranged at intervals along the radial direction of the shaft 4, and the inner circumferential surfaces of the plurality of pole shoes 21 and the outer circumferential surface of the shaft 4 are filled with magnetic liquid. Permanent magnets 22 are provided in the housing 1 and surround the outer peripheral side of the shaft 4, and the permanent magnets 22 are located between the adjacent pole pieces 21. Therefore, the permanent magnet 22, the pole shoe 21 and the magnetic liquid form a closed magnetic circuit, the permanent magnet 22 is utilized to generate a non-uniform magnetic field with alternate strength between the pole shoe 21 and the shaft 4, and the magnetic liquid is absorbed between the pole teeth and the pole body 2, so that the magnetic liquid is filled in the gap to generate pressure resistance, and the purpose of sealing is achieved.
In some embodiments, friction enhancer 5 and magnetic fluid seal assembly 2 are disposed diametrically opposite shaft 4. Specifically, as shown in fig. 1, the friction increasing member 5 is disposed opposite to the magnetic liquid of the magnetic liquid seal assembly 2 in the radial direction of the shaft 4. Therefore, heat generated by relative friction of the friction increasing piece 5, the shaft 4 and the shaft sleeve 3 can be timely transmitted to the magnetic liquid, and the working efficiency of the friction increasing piece 5 is improved.
In some embodiments, the magnetic fluid sealing apparatus 100 for reducing the start-up torque further includes a sealing member 101, an annular groove is provided in at least one of the outer circumferential surface of the shaft 4 or the inner circumferential surface of the shaft sleeve 3, the sealing member 101 is fitted in the annular groove, and the outer circumferential surface of the sealing member 101 is fitted to the inner circumferential surface of the shaft sleeve 3. Thereby, the sealing performance of the magnetic fluid sealing apparatus 100 reducing the starting torque is improved by the seal 101, preventing gas from leaking between the shaft 4 and the boss 3.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A magnetic fluid seal assembly for reducing start-up torque, comprising:
a housing;
the magnetic liquid sealing assembly is arranged in the shell and provided with a through hole;
the shaft sleeve is at least partially matched in the through hole and can rotate in the through hole, a first annular gap is formed between the outer peripheral wall of the shaft sleeve and the inner peripheral wall of the through hole, and the first annular gap is used for filling magnetic liquid;
a shaft, at least a portion of which is rotationally fitted within the sleeve, a second annular gap being formed between an outer peripheral wall of the shaft and an inner peripheral wall of the sleeve;
the friction increasing piece is arranged in the second annular gap and used for increasing the friction effect between the shaft and the shaft sleeve when the shaft rotates relative to the shaft sleeve so as to frictionally heat the magnetic liquid.
2. The reduced activation torque magnetic fluid seal assembly of claim 1, wherein said friction enhancer and said magnetic fluid seal assembly are disposed diametrically opposite said shaft.
3. The starting torque reducing magnetic fluid seal device according to claim 1, wherein at least one of an inner peripheral surface of said bushing or an outer peripheral surface of said shaft is provided with a groove extending in a circumferential direction of said shaft, said second annular gap being formed in said groove.
4. The starting torque reducing magnetic fluid seal apparatus according to claim 3, wherein one end of said groove extends in an axial direction of said shaft and penetrates said shaft or said sleeve,
the magnetic liquid sealing device for reducing the starting torque further comprises an end cover, the end cover is sleeved on the outer peripheral surface of the shaft, and the friction increasing piece is arranged between the end cover and the groove, so that the end cover can compress the friction increasing piece.
5. The startup torque reducing magnetic fluid seal apparatus according to any one of claims 1 to 4, wherein the friction increasing member includes:
a rope body;
and the metal foil tape is wound on the outer peripheral side of the rope body.
6. The starting torque reducing magnetic fluid seal apparatus according to claim 5, wherein said rope body is an asbestos cord, and a cross-sectional shape of said asbestos cord is rectangular.
7. The starting torque reducing magnetic fluid seal apparatus according to claim 5, wherein the metal foil strip is made of any one of aluminum, lead or tin.
8. The startup torque reducing magnetic fluid seal device according to claim 1, further comprising a first magnetism isolating ring and a second magnetism isolating ring surrounding the shaft sleeve and located within the housing, the first magnetism isolating ring and the second magnetism isolating ring being spaced apart in an axial direction of the shaft, the magnetic fluid seal device being located between the first magnetism isolating ring and the second magnetism isolating ring.
9. The reduced activation torque magnetic fluid seal assembly of any one of claims 1-4 or 6-8, wherein the magnetic fluid seal assembly includes:
the pole shoes are arranged in the shell, the shaft sleeve is sleeved with the pole shoes, the inner circumferential surfaces of the pole shoes and the outer circumferential surface of the shaft sleeve are arranged at intervals along the radial direction of the shaft, and magnetic liquid is filled in the inner circumferential surfaces of the pole shoes and the outer circumferential surface of the shaft sleeve;
the permanent magnet is arranged in the shell and surrounds the outer periphery of the shaft, and the permanent magnet is positioned between the adjacent pole shoes.
10. The startup torque-reducing magnetic liquid seal device according to any one of claims 1 to 4 or 6 to 8, further comprising a seal member, wherein an annular groove is provided in at least one of the outer peripheral surface of the shaft or the inner peripheral surface of the shaft sleeve, the seal member is fitted in the annular groove, and the outer peripheral surface of the seal member is in abutment with the inner peripheral surface of the shaft sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110821277.0A CN113669459B (en) | 2021-07-20 | 2021-07-20 | Magnetic liquid sealing device for reducing starting torque |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110821277.0A CN113669459B (en) | 2021-07-20 | 2021-07-20 | Magnetic liquid sealing device for reducing starting torque |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113669459A true CN113669459A (en) | 2021-11-19 |
| CN113669459B CN113669459B (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110821277.0A Active CN113669459B (en) | 2021-07-20 | 2021-07-20 | Magnetic liquid sealing device for reducing starting torque |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5593164A (en) * | 1992-10-08 | 1997-01-14 | Ferrofluidics Corporation | Ferrofluidic seal centering ring |
| CN102183327A (en) * | 2011-02-23 | 2011-09-14 | 南京林业大学 | Mechanical seal face friction torque measurement method |
| CN111306200A (en) * | 2020-03-16 | 2020-06-19 | 威海化工机械有限公司 | Magnetic coupling transmission sealing device |
| CN112212011A (en) * | 2020-10-30 | 2021-01-12 | 清华大学 | Magnetic liquid sealing device |
-
2021
- 2021-07-20 CN CN202110821277.0A patent/CN113669459B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5593164A (en) * | 1992-10-08 | 1997-01-14 | Ferrofluidics Corporation | Ferrofluidic seal centering ring |
| CN102183327A (en) * | 2011-02-23 | 2011-09-14 | 南京林业大学 | Mechanical seal face friction torque measurement method |
| CN111306200A (en) * | 2020-03-16 | 2020-06-19 | 威海化工机械有限公司 | Magnetic coupling transmission sealing device |
| CN112212011A (en) * | 2020-10-30 | 2021-01-12 | 清华大学 | Magnetic liquid sealing device |
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|---|---|
| CN113669459B (en) | 2022-04-29 |
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