CN113324039B - Method for reducing starting torque of magnetic liquid sealing device - Google Patents
Method for reducing starting torque of magnetic liquid sealing device Download PDFInfo
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- CN113324039B CN113324039B CN202110535746.2A CN202110535746A CN113324039B CN 113324039 B CN113324039 B CN 113324039B CN 202110535746 A CN202110535746 A CN 202110535746A CN 113324039 B CN113324039 B CN 113324039B
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- 239000007788 liquid Substances 0.000 title claims abstract description 66
- 238000007789 sealing Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000000376 reactant Substances 0.000 claims abstract description 51
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 11
- 239000011553 magnetic fluid Substances 0.000 claims description 11
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical group [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 230000004913 activation Effects 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 claims description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical group O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 5
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 3
- 239000005977 Ethylene Substances 0.000 claims description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical group [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 3
- 229960003753 nitric oxide Drugs 0.000 claims description 3
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 3
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002122 magnetic nanoparticle Substances 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Images
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention discloses a method for reducing the starting torque of a magnetic liquid sealing device, wherein the magnetic liquid sealing device is provided with a cavity, a first inflow hole, a second inflow hole and an outflow hole, and the first inflow hole, the second inflow hole and the outflow hole are communicated with the cavity; the method for reducing the starting torque of the magnetic liquid sealing device comprises the following steps: continuously introducing a first reactant to the first inflow hole so that the first reactant enters the chamber; and continuously introducing a second reactant to the second inflow hole so that the second reactant enters the chamber, wherein the first reactant and the second reactant generate an exothermic reaction in the chamber to generate a product, and the product is discharged outwards along the outflow hole. According to the method for reducing the starting torque of the magnetic liquid sealing device, the starting torque of the magnetic liquid sealing device can be quickly reduced, and the performance of the magnetic liquid sealing device is improved.
Description
Technical Field
The invention relates to the technical field of mechanical engineering sealing, in particular to a method for reducing starting torque of a magnetic liquid sealing device.
Background
The magnetic liquid is a stable colloid formed by uniformly dispersing magnetic nanoparticles coated with a surfactant in a base carrier liquid. The magnetic liquid seal is a sealing technology using magnetic liquid as a sealing medium, has the advantages of zero leakage, long service life, no pollution, high reliability and the like, and is a high-performance sealing technology.
However, due to the physical characteristics of the base carrier liquid, the viscosity of the magnetic liquid is significantly increased at low temperature, so that the starting torque of the magnetic liquid seal at low temperature is increased, and the problems of long starting time, slow response, overload damage of the motor and the like of the magnetic liquid seal device are easily caused.
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 method for reducing the starting torque of the magnetic liquid sealing device, which can rapidly reduce the starting torque of the magnetic liquid sealing device and can improve the performance of the magnetic liquid sealing device.
The magnetic liquid sealing device is provided with a cavity, a first inflow hole, a second inflow hole and an outflow hole, wherein the first inflow hole, the second inflow hole and the outflow hole are communicated with the cavity; the method for reducing the starting torque of the magnetic liquid sealing device comprises the following steps: continuously introducing a first reactant to the first inflow hole so that the first reactant enters the chamber; and continuously introducing a second reactant to the second inflow hole so that the second reactant enters the chamber, wherein the first reactant and the second reactant generate an exothermic reaction in the chamber to generate a product, and the product is discharged outwards along the outflow hole.
According to the method for reducing the starting torque of the magnetic liquid sealing device, the temperature in the cavity is increased through the exothermic chemical reaction in the cavity in the magnetic liquid sealing device, so that the magnetic liquid is heated, the viscosity of the magnetic liquid is reduced, and the starting torque of the magnetic liquid sealing device is reduced.
In some embodiments, the first reactant, the second reactant, and the product are all gases.
In some embodiments, the first reactant is nitric oxide, the second reactant is carbon monoxide, and the products are nitrogen and carbon dioxide.
In some embodiments, the first reactant is ethylene, the second reactant is ozone, and the products are acetaldehyde and oxygen.
In some embodiments, a catalyst coating is applied to the walls bounding the chamber.
In some embodiments, the first reactant is carbon monoxide, the second reactant is oxygen, the product is carbon dioxide, and the catalyst coating is a platinum coating.
In some embodiments, the chamber comprises a first chamber and a second chamber, the first chamber and the second chamber are arranged at intervals in the magnetic liquid sealing device, the first inflow hole, the second inflow hole and the outflow hole are all communicated with the first chamber, and the first inflow hole, the second inflow hole and the outflow hole are all communicated with the second chamber.
In some embodiments, the magnetic liquid sealing device includes a housing, a shaft penetrating through the housing, a first pole shoe disposed in the housing and sleeved on an outer side of the shaft, an inner circumferential wall of the first pole shoe is provided with a plurality of first pole teeth, the plurality of first pole teeth are arranged along an axial direction of the shaft at intervals, a magnetic liquid for sealing is disposed between a tooth top surface of the first pole teeth and an outer circumferential surface of the shaft, an annular gap between every two adjacent first pole teeth is the first chamber, the second pole shoe is disposed in the housing and sleeved on an outer side of the shaft, an inner circumferential wall of the second pole shoe is provided with a plurality of second pole teeth, the plurality of second pole teeth are arranged along the axial direction of the shaft at intervals, and a magnetic liquid for sealing is disposed between a tooth top surface of the second pole teeth and the outer circumferential surface of the shaft, an annular gap between every two adjacent second pole teeth is the second cavity, the permanent magnet is arranged in the shell and sleeved on the outer side of the shaft, the permanent magnet is positioned between the first pole shoe and the second pole shoe, and the permanent magnet, the first pole shoe, the magnetic liquid and the second pole shoe form a magnetic loop.
In some embodiments, the first inflow hole, the second inflow hole and the outflow hole are all provided in some embodiments, the shaft further has a first inflow through hole, a second inflow through hole, a third inflow through hole, a fourth inflow through hole, a first outflow through hole and a second outflow through hole, the first inflow hole communicates with the first chamber through the first inflow through hole, the first inflow hole communicates with the second chamber through the second inflow through hole, the second inflow hole communicates with the first chamber through the third inflow through hole, the second inflow hole communicates with the second chamber through the fourth inflow through hole, the outflow hole communicates with the first chamber through the first outflow through hole, and the outflow hole communicates with the second chamber through the second outflow through hole.
Drawings
FIG. 1 is a schematic view of a magnetic fluid seal apparatus according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 2;
fig. 4 is a cross-sectional view taken along line C-C in fig. 2.
Reference numerals:
the shaft (1) is provided with a plurality of grooves,
a first inflow hole 11, a first inflow via hole 111, a second inflow via hole 112,
a second inflow hole 12, a third inflow via 121, a fourth inflow via 122,
the outflow hole 13, the first outflow through hole 131, the second outflow through hole 132,
the outer casing 2 is provided with a plurality of through holes,
the first pole shoe 3, the first tooth 31,
the second pole shoe 4, the second tooth 41,
the permanent magnets (5) are arranged in such a way that,
the magnetic liquid (7) is in the form of a magnetic liquid,
the shape of the O-shaped ring 8,
and an end cap 9.
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.
The method for reducing the starting torque of the magnetic liquid seal device according to the embodiment of the invention is described below with reference to the accompanying drawings.
As shown in fig. 1 to 4, the magnetic liquid sealing device has a chamber 6, a first inflow hole 11, a second inflow hole 12, and an outflow hole 13, where the first inflow hole 11, the second inflow hole 12, and the outflow hole 13 are all communicated with the chamber 6, and it should be noted that the positions of the first inflow hole 11, the second inflow hole 12, and the outflow hole 13 may be arranged according to the specific structure of the magnetic liquid sealing device, and only the chamber 6 in the magnetic liquid sealing device needs to be communicated with the outside.
Specifically, the method for reducing the starting torque of the magnetic liquid sealing device comprises the following steps:
continuously introducing the first reactant into the first inflow hole 11 so that the first reactant enters the chamber 6;
the second reactant is continuously introduced into the second inflow hole 12 so as to enter the chamber 6, the first reactant and the second reactant undergo an exothermic reaction in the chamber 6 to generate a product, and the product is discharged outwards along the outflow hole 13 (the direction indicated by the arrow in the figure is the flowing direction of the reactants or the product).
According to the method for reducing the starting torque of the magnetic liquid sealing device, the temperature in the cavity 6 is increased through the exothermic chemical reaction in the cavity 6 in the magnetic liquid sealing device, so that the magnetic liquid 7 is heated, the viscosity of the magnetic liquid 7 is reduced, and the starting torque of the magnetic liquid sealing device is reduced.
In some embodiments, the first reactant, the second reactant and the product are all gas, so that the smoothness of the pore channel can be ensured by using the gas, the blockage cannot occur, the reaction can be continuously performed, the gas cannot influence the sealing performance of the magnetic liquid sealing device, and the stability of the device is ensured.
Alternatively, the first reactant is nitric oxide, the second reactant is carbon monoxide, and the products are nitrogen and carbon dioxide.
Alternatively, the first reactant is ethylene, the second reactant is ozone, and the products are acetaldehyde and oxygen.
In some embodiments, the method of reducing the activation torque of the magnetic fluid seal further comprises applying a catalyst coating to the wall defining the chamber 6, the catalyst coating for modifying the chemical reaction rate of the reactant.
Optionally, the first reactant is carbon monoxide, the second reactant is oxygen, the product is carbon dioxide, the catalyst coating is a platinum coating, and the platinum coating can accelerate the reaction between the carbon monoxide and the oxygen, so that the purposes of rapidly releasing heat and rapidly heating the inside of the magnetic liquid sealing device are achieved.
In some embodiments, the chamber 6 of the magnetic liquid sealing device includes a first chamber 61 and a second chamber 62, and the first chamber 61 and the second chamber 62 are arranged at intervals in the magnetic liquid sealing device, it should be noted that the magnetic liquid sealing device mainly depends on the magnetic liquid 7 in the sealing gap to realize sealing, and the magnetic liquid sealing device generally has two sealing gaps, and the first chamber 61 and the second chamber 62 can be respectively arranged adjacent to one sealing gap, so that the magnetic liquid 7 at the two sealing gaps can be rapidly heated.
Specifically, the first inflow hole 11, the second inflow hole 12 and the outflow hole 13 are all communicated with the first chamber 61, and the first inflow hole 11, the second inflow hole 12 and the outflow hole 13 are all communicated with the second chamber 62, so that the first reactant can be introduced into the first chamber 61 and the second chamber 62 through the first inflow hole 11 at the same time, the second reactant can be introduced into the first chamber 61 and the second chamber 62 through the second inflow hole 12 at the same time, and the product in the first chamber 61 and the second chamber 62 can be discharged outside through the outflow hole 13 at the same time.
The magnetic liquid seal device comprises a housing 2, a shaft 1, a first pole piece 3, a second pole piece 4 and a permanent magnet 5.
Wherein the shaft 1 extends through the housing 2 and is rotatable relative to the housing 2. The first pole shoe 3 is arranged in the shell 2 and sleeved on the outer side of the shaft 1, a plurality of first pole teeth 31 are arranged on the inner circumferential wall of the first pole shoe 3, the first pole teeth 31 are arranged at intervals along the axial direction of the shaft 1, a sealing gap is formed between the tooth top surface of each first pole tooth 31 and the outer circumferential surface of the shaft 1, magnetic liquid 7 used for sealing is arranged in the sealing gap, and an annular gap between every two adjacent first pole teeth 31 is a first cavity 61.
Similarly, the second pole piece 4 is disposed in the housing 2 and sleeved outside the shaft 1, the inner circumferential wall of the second pole piece 4 is provided with a plurality of second teeth 41, the plurality of second teeth 41 are arranged at intervals along the axial direction of the shaft 1, another sealing gap is formed between the tooth top surface of the second teeth 41 and the outer circumferential surface of the shaft 1, the magnetic liquid 7 for sealing is disposed in the sealing gap, and the annular gap between every two adjacent second teeth 41 is a second chamber 62.
It will be understood that the first chamber 61 refers to the tooth space formed by the first tooth 31, and the second chamber 62 refers to the tooth space formed by the second tooth 41, and the tooth space is adjacent to the sealing gap, so that the heat in the tooth space can be rapidly transferred to the sealing gap, thereby realizing rapid temperature rise. In addition, since the splines are generally plural, the first chamber 61 may be one or more, and the second chamber 62 may be one or more, and when the first chamber 61 and the second chamber 62 are plural, each of the first chamber 61 and each of the second chamber 62 should be communicated with the first inflow hole 11, the second inflow hole 12, and the outflow hole 13 to further increase the temperature rising speed.
The permanent magnet 5 is arranged in the shell 2 and sleeved on the outer side of the shaft 1, the permanent magnet 5 is located between the first pole shoe 3 and the second pole shoe 4, and the permanent magnet 5, the first pole shoe 3, the magnetic liquid 7 and the second pole shoe 4 form a magnetic loop. It should be noted that the first pole shoe 3, the shaft 1 and the second pole shoe 4 are made of magnetic conductive materials, the housing 2 is made of non-magnetic conductive materials, and the magnetic liquid 7 is attracted to the tooth tops of the first pole tooth 31 and the second pole tooth 41 under the action of the magnetic field and contacts with the shaft 1 to achieve sealing.
In some embodiments, the first inflow hole 11, the second inflow hole 12 and the outflow hole 13 are all arranged on the shaft 1, and three duct holes are arranged on the shaft 1, so that the processing technology is simple, the housing 2 of the magnetic liquid sealing device cannot be damaged, and the sealing performance of the device cannot be influenced, and the first inflow hole 11, the second inflow hole 12 and the outflow hole 13 can be directly communicated with the first chamber 61 and the second chamber 62 because the first pole tooth 31 and the second pole tooth 41 are adjacent to the outer surface of the shaft 1.
Further, the shaft 1 is further provided with a first inflow through hole 111, a second inflow through hole 112, a third inflow through hole 121, a fourth inflow through hole 122, a first outflow through hole 131, and a second outflow through hole 132, the first inflow hole 11, the second inflow hole 12, and the outflow hole 13 are formed along the axial direction of the shaft 1, and the first inflow through hole 111, the second inflow through hole 112, the third inflow through hole 121, the fourth inflow through hole 122, the first outflow through hole 131, and the second outflow through hole 132 are formed along the radial direction of the shaft 1.
The first inflow hole 11 communicates with the first chamber 61 through the first inflow through hole 111, and the first inflow hole 11 communicates with the second chamber 62 through the second inflow through hole 112. The second inflow hole 12 communicates with the first chamber 61 through the third inflow through hole 121, and the second inflow hole 12 communicates with the second chamber 62 through the fourth inflow through hole 122. The outflow hole 13 communicates with the first chamber 61 through a first outflow through hole 131, and the outflow hole 13 communicates with the second chamber 62 through a second outflow through hole 132.
In some embodiments, the outer peripheral wall of the first pole piece 3 is provided with an annular groove, an O-ring 8 is arranged in the annular groove, and the O-ring 8 is used for preventing the sealed medium from leaking through the gap between the first pole piece 3 and the shell 2. Similarly, the outer peripheral wall of the second pole piece 4 is also provided with an annular groove, an O-shaped ring 8 is arranged in the annular groove, and the O-shaped ring 8 is used for preventing the sealed medium from leaking through the gap between the second pole piece 4 and the shell 2.
It should be noted that, according to the magnetic powder sealing device of the embodiment of the present invention, the structure of the housing 2 may be an integral structure, but for the convenience of assembly, the housing 2 may also be a separate structure, or the housing 2 is opened and provided with the end cap 9, and the structure of the housing 2 may be selected according to specific situations.
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 method of reducing the activation torque of a magnetic fluid seal, wherein the magnetic fluid seal has a chamber, a first inflow orifice, a second inflow orifice, and an outflow orifice, the first inflow orifice, the second inflow orifice, and the outflow orifice all communicating with the chamber;
the method for reducing the starting torque of the magnetic liquid sealing device comprises the following steps:
continuously introducing a first reactant to the first inflow hole so that the first reactant enters the chamber;
and continuously introducing a second reactant to the second inflow hole so that the second reactant enters the chamber, wherein the first reactant and the second reactant generate an exothermic reaction in the chamber to generate a product, and the product is discharged outwards along the outflow hole.
2. The method of reducing the activation torque of a magnetic fluid seal of claim 1, wherein the first reactant, the second reactant, and the product are all gases.
3. The method for reducing the startup torque of a magnetic fluid seal device according to claim 1, wherein the first reactant is nitric oxide, the second reactant is carbon monoxide, and the products are nitrogen and carbon dioxide.
4. The method for reducing the startup torque of a magnetic liquid seal according to claim 1, wherein the first reactant is ethylene, the second reactant is ozone, and the products are acetaldehyde and oxygen.
5. The method for reducing the startup torque of a magnetic liquid seal device according to claim 1, further comprising applying a catalyst coating on the wall surface enclosing the chamber.
6. The method of reducing the startup torque of a magnetic fluid seal according to claim 5, wherein the first reactant is carbon monoxide, the second reactant is oxygen, the product is carbon dioxide, and the catalyst coating is a platinum coating.
7. The method for reducing the activation torque of a magnetic liquid seal according to claim 1, wherein the chamber comprises a first chamber and a second chamber, the first chamber and the second chamber being spaced apart within the magnetic liquid seal, the first inflow hole, the second inflow hole and the outflow hole each communicating with the first chamber, the first inflow hole, the second inflow hole and the outflow hole each communicating with the second chamber.
8. The method for reducing the activation torque of a magnetic fluid seal of claim 7, wherein the magnetic fluid seal comprises:
a housing;
a shaft extending through the housing;
the first pole shoe is arranged in the shell and sleeved on the outer side of the shaft, a plurality of first pole teeth are arranged on the inner circumferential wall of the first pole shoe at intervals along the axial direction of the shaft, magnetic liquid for sealing is arranged between the tooth top surface of each first pole tooth and the outer circumferential surface of the shaft, and an annular gap between every two adjacent first pole teeth is a first cavity;
the second pole shoe is arranged in the shell and sleeved outside the shaft, a plurality of second pole teeth are arranged on the inner circumferential wall of the second pole shoe at intervals along the axial direction of the shaft, magnetic liquid for sealing is arranged between the tooth top surface of each second pole tooth and the outer circumferential surface of the shaft, and an annular gap between every two adjacent second pole teeth is a second cavity;
the permanent magnet is arranged in the shell and sleeved on the outer side of the shaft, the permanent magnet is positioned between the first pole shoe and the second pole shoe, and the permanent magnet, the first pole shoe, the magnetic liquid and the second pole shoe form a magnetic loop.
9. The method for reducing the activation torque of a magnetic fluid seal apparatus according to claim 8, wherein the first inflow hole, the second inflow hole, and the outflow hole are provided on the shaft.
10. The method for reducing the activation torque of a magnetic fluid seal apparatus according to claim 9, wherein said shaft further comprises:
the first inflow hole is communicated with the first cavity through the first inflow through hole, and the first inflow hole is communicated with the second cavity through the second inflow through hole;
the second inflow hole is communicated with the first cavity through the third inflow through hole, and the second inflow hole is communicated with the second cavity through the fourth inflow through hole;
a first outflow via through which the outflow bore communicates with the first chamber and a second outflow via through which the outflow bore communicates with the second chamber.
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| CN202110535746.2A CN113324039B (en) | 2021-05-17 | 2021-05-17 | Method for reducing starting torque of magnetic liquid sealing device |
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| CN202110535746.2A CN113324039B (en) | 2021-05-17 | 2021-05-17 | Method for reducing starting torque of magnetic liquid sealing device |
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| CN113324039B true CN113324039B (en) | 2022-03-11 |
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| US20160230894A1 (en) * | 2015-02-06 | 2016-08-11 | White River Innovation Inc. | Methods and devices for magnetic fluid seals |
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