CN112303241A - Magnetic fluid sealing structure of space station steam compression distillation device - Google Patents
Magnetic fluid sealing structure of space station steam compression distillation device Download PDFInfo
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- CN112303241A CN112303241A CN202011179913.6A CN202011179913A CN112303241A CN 112303241 A CN112303241 A CN 112303241A CN 202011179913 A CN202011179913 A CN 202011179913A CN 112303241 A CN112303241 A CN 112303241A
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- 238000007789 sealing Methods 0.000 title claims abstract description 143
- 239000011553 magnetic fluid Substances 0.000 title claims abstract description 67
- 230000006835 compression Effects 0.000 title claims abstract description 43
- 238000007906 compression Methods 0.000 title claims abstract description 43
- 238000004821 distillation Methods 0.000 title claims abstract description 41
- 238000009434 installation Methods 0.000 claims abstract description 11
- 238000002955 isolation Methods 0.000 claims abstract 9
- 230000007704 transition Effects 0.000 claims description 6
- 230000005389 magnetism Effects 0.000 description 29
- 238000005516 engineering process Methods 0.000 description 9
- 239000007788 liquid Substances 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/041—Treatment of water, waste water, or sewage by heating by distillation or evaporation by means of vapour compression
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
本发明公开了一种空间站蒸汽压缩蒸馏装置的磁流体密封结构，安装于需要动密封的旋转轴和端面，包括壳体和位于壳体内且套设于旋转轴的密封部、端盖、两个轴承。其中，壳体套设于旋转轴上，其第一端与端面连接。密封部包括位于极靴组件、位于极靴组件两侧的左隔磁环和右隔磁环、永磁体。极靴组件包括至少两个极靴，且极靴的内圆面上凸设有若干极齿，极齿与旋转轴之间具有密封间隙，密封间隙内设有磁流体，极靴的外圆面与壳体的内壁面密封连接。相邻两个极靴之间设有永磁体，相邻两个永磁体的相邻侧的磁极相同。壳体内壁面向内凸设有用于与左隔磁环贴合的台阶，端盖安装于壳体的第二端，用于压紧密封部。轴承安装于极靴内圆面上凹设的安装槽中。
The invention discloses a magnetic fluid sealing structure of a vapor compression distillation device of a space station, which is installed on a rotating shaft and an end face requiring dynamic sealing, and comprises a casing, a sealing part located in the casing and sleeved on the rotating shaft, an end cover, two bearing. Wherein, the shell is sleeved on the rotating shaft, and its first end is connected with the end face. The sealing part includes a pole piece assembly, a left magnetic isolation ring and a right magnetic isolation ring located on both sides of the pole piece assembly, and a permanent magnet. The pole piece assembly includes at least two pole pieces, and a plurality of pole teeth are protruded on the inner circular surface of the pole piece, and there is a sealing gap between the pole teeth and the rotating shaft, and a magnetic fluid is arranged in the sealing gap. Sealed connection with the inner wall of the housing. Permanent magnets are arranged between two adjacent pole pieces, and the magnetic poles on the adjacent sides of the two adjacent permanent magnets are the same. The inner wall of the casing is protruded inwardly provided with a step for fitting with the left magnetic isolation ring, and the end cover is installed on the second end of the casing for pressing the sealing part. The bearing is installed in the concave installation groove on the inner circular surface of the pole piece.
Description
Technical Field
The invention belongs to the field of aerospace and mechanical engineering sealing, and particularly relates to a magnetic fluid sealing structure of a space station steam compression distillation device.
Background
Sealing is a very important technique in space stations, both between individual cabin sections and in the various equipment in space stations.
The steam compression distillation device is the key equipment of a waste water regeneration system in a space station project which is organized and implemented in China at present, and is the key equipment in a urine collection and regeneration treatment system. For the research and application of such devices, the dynamic sealing technology is the supporting technology among them. The good dynamic seal plays a vital role in the running performance, stability and reliability of the equipment and the whole machine, and also plays a vital role in the water yield and the water quality of the equipment.
However, in the conventional vapor compression distillation device, the dynamic seal is often sealed by directly adopting a sealing ring or a rubber ring, and the sealing technology has high leakage rate, short service life and low reliability.
Disclosure of Invention
The invention aims to provide a magnetic fluid sealing structure of a space station vapor compression distillation device, which aims to solve the problems of high leakage rate, short service life and low reliability of the traditional sealing technology adopted by the vapor compression distillation device in the prior art.
The technical scheme of the invention is as follows:
the utility model provides a space station vapor compression distillation plant's magnetic fluid seal structure, installs in the rotation axis and the terminal surface that need the dynamic seal, its characterized in that includes:
the two ends of the shell are opened and sleeved on the rotating shaft, and the first end of the shell is connected with the end face;
a seal portion provided between the rotary shaft and an inner wall surface of the housing, including:
the pole shoe assembly comprises at least two pole shoes, the pole shoes are sequentially sleeved on the rotating shaft at intervals along the axial direction of the rotating shaft, a plurality of pole teeth are arranged on the inner circular surface of each pole shoe in a protruding mode, the outer circular surface of each pole shoe is connected with the inner wall surface of the shell in a sealing mode, a sealing gap is formed between the inner circular surface of each pole tooth and the rotating shaft, and magnetic fluid is arranged in each sealing gap;
a permanent magnet is arranged between every two adjacent pole shoes, the rotating shaft is sleeved with the permanent magnet, and the adjacent sides of the two adjacent permanent magnets have the same magnetic pole;
the left magnetism isolating ring and the right magnetism isolating ring are respectively sleeved on the rotating shaft and are respectively arranged on two sides of the pole shoe component;
the end cover is arranged at the second end of the shell, a step is arranged on the inner wall surface of the shell in an inward protruding mode, the step is attached to the left magnetism isolating ring in the sealing part, the right magnetism isolating ring in the sealing part is attached to the end cover, and the end cover is connected with the inner wall surface of the shell and used for fixing the position of the sealing part in the shell;
each bearing is arranged on one pole shoe, an installation groove is concavely arranged on the inner circular surface of the pole shoe provided with the bearing and used for installing the corresponding bearing, the inner ring of the bearing is connected with the rotating shaft, and the outer ring of the bearing is connected with the installation groove.
Preferably, the outer circular surface of the pole shoe is connected with the inner wall surface of the shell in a sealing mode through a sealing ring.
Preferably, a sealing ring groove is formed in the outer circular surface of each pole shoe, and the sealing ring is accommodated in the sealing ring groove.
Preferably, the sealing portion comprises three of the pole shoes and two of the permanent magnets;
the three pole shoes are sequentially a first pole shoe, a second pole shoe and a third pole shoe along the axial direction of the rotating shaft, the first pole shoe is attached to the left magnetism isolating ring, and the third pole shoe is attached to the right magnetism isolating ring;
the two permanent magnets are respectively a first permanent magnet and a second permanent magnet, the first permanent magnet is arranged between the first pole shoe and the second pole shoe, and the second permanent magnet is arranged between the second pole shoe and the third pole shoe.
Preferably, the bearing assembly comprises two bearings, namely a left bearing and a right bearing, wherein the first pole shoe and the second pole shoe are respectively provided with the mounting groove, the left bearing is mounted in the mounting groove on the first pole shoe, and the right bearing is mounted in the mounting groove on the second pole shoe.
Preferably, a sealed transition cavity is formed by matching the end face, the shell, the left magnetism isolating ring, the first pole shoe and the rotating shaft, and gas is filled in the sealed transition cavity for pressure maintaining.
Preferably, the end cap is screwed to an inner wall surface of the housing.
Preferably, the pole teeth are square teeth.
Preferably, the size of the sealing gap is 0.05mm to 5 mm.
Preferably, the number of the bearings is 2-10.
Preferably, the number of the permanent magnets is 1-10.
Preferably, the number of the pole teeth on each pole shoe is 1-20.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:
(1) in the invention, the steam compression distillation device adopts magnetic fluid seal and is arranged on a rotating shaft and an end face which need dynamic seal; when the magnetic liquid seal is applied to the rotating shaft seal, the defects of large abrasion, large power consumption, short service life and the like in the solid seal can be overcome, zero leakage in the running and stopping processes can be realized, in addition, the magnetic liquid seal is less influenced by vibration and eccentricity, the sealing structure is simple, maintenance is not needed, the reliability is high, and the application cost is saved. Therefore, the magnetic fluid sealing structure of the space station steam compression distillation device solves the problems of high leakage rate, short service life and low reliability of the traditional sealing technology adopted by the steam compression distillation device in the prior art.
(2) Compared with the traditional magnetic fluid sealing structure which is applied to the ground and has the bearing arranged outside the sealing part, the magnetic fluid sealing structure of the space station steam compression distillation device provided by the invention has the advantages that the bearing is arranged in the mounting groove of the pole shoe in the sealing part, so that the axial space of the magnetic fluid sealing structure is reduced, the requirement of the envelope surface of the product at the last day is met, the size of the pole shoe is saved and optimized, the weight is reduced, and the magnetic fluid sealing technology is successfully applied to the space station steam compression finishing device.
(3) According to the invention, the bearing is arranged in the mounting groove of the pole shoe, so that the space is saved, the magnetic field utilization rate of the permanent magnet is increased, and the purpose of magnetic collection is achieved, thereby greatly increasing the sealing pressure resistance capability of the magnetic fluid.
(4) The magnetic fluid sealing structure of the space station steam compression distillation device provided by the invention can reduce the loss of magnetic fluid when the seal is demagnetized, reduce stress concentration, facilitate production and processing, increase the magnetic field intensity at the seal position, further improve the sealing reliability of the pressure resistance of the magnetic fluid seal in the extreme environment of the space station, and enlarge the safe working range in the space station steam compression distillation device.
(5) The magnetic fluid sealing structure of the space station steam compression distillation device provided by the invention meets the requirements of installation and disassembly, reduces the loss of magnetic fluid when the sealing fails as much as possible, increases the secondary pressure bearing capacity and the self-repairing capacity of the sealing device, further improves the pressure resistance and the sealing reliability of the magnetic fluid sealing under special conditions, and enlarges the safe working range of the sealing device.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.
FIG. 1 is a schematic structural view of a magnetic fluid sealing structure of a space station vapor compression distillation apparatus according to the present invention;
FIG. 2 is a schematic cross-sectional view of a first pole piece of the present invention;
fig. 3 is an enlarged view of a partial structure of a tooth according to the present invention.
Description of reference numerals:
1: a housing; 2: a rotating shaft; 3: a first pole piece; 4: a second pole piece; 5: a third pole shoe; 6: a first permanent magnet; 7: a second permanent magnet; 8: a seal ring; 9: a left magnetism isolating ring; 10: a right magnetism isolating ring; 11: a left bearing; 12: a right bearing; 13: an end cap; 14: a pole tooth.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
Referring to fig. 1 to 3, the present embodiment provides a magnetic fluid sealing structure of a space station vapor compression distillation device, which is installed on a rotating shaft 2 and an end face requiring dynamic sealing, and comprises a housing 1, a sealing part, an end cover 13 and at least two bearings. The two ends of the shell 1 are open and sleeved on the rotating shaft 2, and the first end of the shell 1 is connected with the end face.
The sealing part is arranged between the rotating shaft 2 and the inner wall surface of the shell 1 and comprises a pole shoe component, a permanent magnet, a left magnetism isolating ring 9 and a right magnetism isolating ring 10. The pole shoe component comprises at least two pole shoes, the pole shoes are sequentially arranged on the rotating shaft 2 at intervals along the axial direction of the rotating shaft 2, a plurality of pole teeth 14 are arranged on the inner circular surface of each pole shoe in a protruding mode, the outer circular surface of each pole shoe is connected with the inner wall surface of the shell 1 in a sealing mode, a sealing gap exists between the inner circular surface of each pole tooth 14 and the rotating shaft 2, and magnetic fluid is arranged in the sealing gap. And a permanent magnet is arranged between every two adjacent pole shoes, the rotating shaft 2 is sleeved with the permanent magnet, and the magnetic poles of the adjacent sides of every two adjacent permanent magnets are the same. The left magnetism isolating ring 9 and the right magnetism isolating ring 10 are respectively sleeved on the rotating shaft 2 and are respectively arranged at two sides of the pole shoe component.
The end cover 13 is arranged at the second end of the shell 1, the inner wall surface of the shell 1 is provided with a step inwards in a protruding mode, the step is attached to the left magnetism isolating ring 9 in the sealing portion, the right magnetism isolating ring 10 in the sealing portion is attached to the end cover 13, and the end cover 13 is connected with the inner wall surface of the shell 1 and used for fixing the position of the sealing portion in the shell 1.
Each bearing is arranged on one pole shoe, an installation groove is concavely arranged on the inner circular surface of the pole shoe provided with the bearing and used for installing the corresponding bearing, the inner ring of the bearing is connected with the rotating shaft 2, and the outer ring of the bearing is connected with the installation groove.
The sealing of magnetic fluids is very widespread and it was first applied to various vacuum devices, where the vacuum sealing of rotating shafts is already well established, to the extent of standardization and generalization. When the magnetic fluid seal is used for isolating the two cavities, if the pressure intensity between the two cavities is the same and no pressure difference exists, the magnetic fluid seal is equivalent to a dustproof seal; if there is a pressure difference between the two cavities, the magnetic fluid in the gap will bear the pressure difference to play a role of sealing.
The space station generally runs on a low-earth orbit of 300km to 600km, and the external space environment is as follows: high vacuum (1.3X 10)-4Pa～1.3×10-7Pa), high temperature and low temperature circulation (-90 ℃ to +125 ℃, alternating once every 90min or so), and the magnetofluid material can meet the working environment conditions of temperature, pressure and humidity in the cabin of the space station. Therefore, the magnetic fluid sealing technology can be applied to the dynamic sealing of the rotating shaft 2 and the end face of the space station vapor compression distillation device.
When the magnetic liquid seal is applied to the rotating shaft seal, the defects of large abrasion, large power consumption, short service life and the like in the solid seal can be overcome, zero leakage in the running and stopping processes can be realized, in addition, the magnetic liquid seal is less influenced by vibration and eccentricity, the sealing structure is simple, maintenance is not needed, the reliability is high, and the application cost is saved. Therefore, the magnetic fluid sealing structure of the vapor compression distillation device for the space station provided by the embodiment adopts magnetic fluid sealing, is installed on the rotating shaft 2 and the end face which need dynamic sealing, and can effectively solve the problems of high leakage rate, short service life and low reliability of the traditional sealing technology adopted by the vapor compression distillation device in the prior art.
However, although the existing magnetic fluid sealing structure applied to the ground has the advantages of convenience in mounting and dismounting, convenience in maintenance and the like, shaft end parts do not need to be dismounted in some cases, and the magnetic fluid sealing structure can be applied to a working environment with difficulty in dismounting, so that the working efficiency is greatly improved, the economic loss caused by shutdown in the industry is reduced, and convenience is brought to production and use. But when it is applied to the technical field of aerospace, the problems such as oversize still exist.
Therefore, in the magnetic fluid sealing device of the vapor compression distillation device for the space station, provided by the embodiment, the multistage pole teeth 14 are processed on the inner circular surface of the pole shoe to form multistage sealing, the sealing gap is formed between the pole teeth 14 and the rotating shaft 2, the magnetic fluid is filled in the sealing gap, the permanent magnet, the pole shoe, the magnetic fluid and the rotating shaft 2 can form a closed magnetic field loop, the magnetic fluid is bound in the sealing gap under the action of a strong magnetic field, and a plurality of liquid O-shaped rings are formed along the pole teeth 14 to play a role in sealing. When the spaces on the two sides of the magnetic fluid sealing structure are under the action of pressure difference, the magnetic liquid can deform, the deformed magnetic liquid can be under the action of magnetic field force, the magnetic field force and the pressure can reach new balance, and the effect of resisting the pressure difference is achieved, so that the problems of low pressure resistance and unobvious magnetic gathering effect of the existing magnetic source magnetic fluid sealing device are solved. Meanwhile, the bearing is arranged in the mounting groove of the pole shoe, so that the axial space of the magnetic fluid sealing structure is reduced, the size is reduced, the requirement of the envelope surface of the product in the last day is met, and the magnetic fluid sealing technology is successfully applied to the space station steam compression finishing device.
The structure of the present embodiment will now be explained. In the present embodiment, the direction toward the entire reaction vessel is set to the left side and the direction away from the entire reaction vessel is set to the right side in the axial direction of the rotary shaft 2.
The left side of the shell 1 is connected with the end face in a manner of connecting by a fastener or the like. The housing 1 is fitted over the rotary shaft 2, but is not in contact with the rotary shaft 2, and is fixed in position by other members. In the present embodiment, the inner wall surface of the housing 1 is circular in cross section, that is, the inner wall surface of the housing 1 is an inner circular surface, and the axis of the inner circular surface of the housing 1 is the same as the axis of the outer circular surface of the rotating shaft 2.
In the present embodiment, the sealing portion includes three pole shoes, two permanent magnets, a magnetic fluid, three sealing rings 8, a left magnetism isolating ring 9, and a right magnetism isolating ring 10. The three pole shoes are a first pole shoe 3, a second pole shoe 4 and a third pole shoe 5 in sequence along the axial direction of the rotating shaft 2, the left side of the first pole shoe 3 is attached to a left magnetism isolating ring 9, and the right side of the third pole shoe 5 is attached to a right magnetism isolating ring 10. The two permanent magnets are respectively a first permanent magnet 6 and a second permanent magnet 7, the first permanent magnet 6 is arranged between the first pole shoe 3 and the second pole shoe 4, and the second permanent magnet 7 is arranged between the second pole shoe 4 and the third pole shoe 5.
The pole shoe is connected with the inner circle surface of the shell 1 through a sealing ring 8 in a sealing way. Specifically, an annular sealing ring groove is formed in the outer circular surface of each pole shoe and used for placing a sealing ring 8 with a corresponding specification. The three sealing rings 8 of the present embodiment are respectively accommodated in the sealing ring grooves of the outer circular surfaces of the three pole shoes.
The end face, the shell 1, the left magnetism isolating ring 9, the first pole shoe 3 and the rotating shaft 2 can be matched to form a sealed transition cavity, and gas is filled in the sealed transition cavity and used for pressure maintaining.
Preferably, in this embodiment, the pole shoe may be made of martensitic steel, the shell 1, the left magnetism isolating ring 9, and the right magnetism isolating ring 10 may be made of non-magnetic materials, the permanent magnet may be made of iron-boron-rivet, and the magnetic fluid may be made of silicone oil-based magnetic liquid with good viscosity-temperature performance; of course, in other embodiments, other materials may be selected according to practical situations, and are not limited herein.
The rotating shaft 2 is rotatably mounted on the pole shoes through bearings. In this embodiment, there are two bearings, which are a left bearing 11 and a right bearing 12, the first pole piece 3 and the second pole piece 4 are both provided with mounting grooves, the left bearing 11 is mounted in the mounting groove of the first pole piece 3, and the right bearing 12 is mounted in the mounting groove of the second pole piece 4. The axial dimension of the first pole piece 3 is the same as the axial dimension of the second pole piece 4, and the axial dimension of the third pole piece 5 is smaller than the axial dimensions of the other two pole pieces because no bearing needs to be mounted on the third pole piece. In particular, the bearing may be a deep groove ball bearing, but is not limited thereto.
The left side of the seal part rests on a step on the inner circumferential surface of the housing 1 and the right side is pressed with the end cap 13. Specifically, the end cap 13 may be made of a non-magnetic material and threadedly coupled to the inner circumferential surface of the housing 1.
Further, in the present embodiment, 5 pole teeth 14 may be disposed on the first pole piece 3 and the second pole piece 4, respectively, and 6 pole teeth 14 may be disposed on the third pole piece 5; the pole teeth 14 can be rectangular teeth, preferably square teeth, which are convenient to machine and have strong sealing and pressure-resisting capabilities. In other embodiments, the number and shape of the teeth 14 can be selected, for example, the number of the teeth 14 on each pole shoe can be 1-20, which is not limited herein.
The size of the sealing gap may be 0.05mm to 5mm, and in the present embodiment, the size of the sealing gap is 0.2 mm.
In other embodiments, the number of permanent magnets and the number of bearings may be rotated as appropriate. The number of the permanent magnets is selected according to the pressure difference of the left side and the right side of the magnetic fluid sealing structure of the space station steam compression distillation device, specifically, the number of the permanent magnets can be 1-10, correspondingly, the number of sealing stages is 1-10, the number of the sealing rings 8 is 1-10, and the number of the pole shoes is 2-11. The number of the bearings is selected according to the pressure between the rotating shaft 2 and the pole shoe, and specifically, the number of the bearings can be 2-10.
Further, the portion of the rotary shaft 2 for mounting the magnetic fluid sealing structure of the space station vapor compression distillation apparatus provided in the present embodiment may be a single-step rotary shaft.
Further, the sealing pressure-resistant field of the magnetic fluid sealing structure of the space station vapor compression distillation device provided by the embodiment is 0.01 MPa-6 MPa.
The installation process of this embodiment is:
firstly, a shell 1 is sleeved on a rotating shaft 2 and is arranged on an end face, and the rest components are arranged in the shell;
secondly, the left magnetism isolating ring 9 is sleeved on the rotating shaft 2 from the right end of the rotating shaft 2, and the left side of the left magnetism isolating ring is attached to the right side of the step on the inner circular surface of the shell 1;
installing the left bearing 11 in the installation groove of the first pole shoe 3, installing a sealing ring 8 in a sealing ring groove of the first pole shoe 3, sleeving the first pole shoe 3 with the left bearing 11 and the sealing ring 8 on the rotating shaft 2 from the right end of the rotating shaft 2, and attaching the left side of the first pole shoe 3 to the right side of the left magnetism isolating ring 9;
sleeving the first permanent magnet 6 on the rotating shaft 2 from the right end of the rotating shaft 2, and attaching the left side of the first permanent magnet 6 to the right side of the first pole shoe 3;
installing the right bearing 12 into the installation groove of the second pole shoe 4, installing a sealing ring 8 into a sealing ring groove of the second pole shoe 4, sleeving the second pole shoe 4 together with the right bearing 12 and the sealing ring 8 on the rotating shaft 2 from the right end of the rotating shaft 2, and attaching the left side of the second pole shoe 4 to the right side of the first permanent magnet 6;
sixthly, sleeving the second permanent magnet on the rotating shaft 2 from the right end of the rotating shaft 2, and attaching the left side of the second permanent magnet 7 to the right side of the second pole shoe 4;
a sealing ring 8 is arranged in a sealing ring groove of the third pole shoe 5, the third pole shoe 5 together with the sealing ring 8 is sleeved on the rotating shaft 2 from the right end of the rotating shaft 2, and the left side of the third pole shoe 5 is attached to the right side of the second permanent magnet 7;
injecting the magnetic fluid into a sealing gap formed by the third pole shoe 5, the second pole shoe 4, the first pole shoe 3 and the rotating shaft 2;
ninthly, sleeving the right magnetism isolating ring 10 on the rotating shaft 2 from the right side of the rotating shaft 2, and attaching the left side of the right magnetism isolating ring 10 to the right side of the third pole shoe 5;
the end cover 13 is further sleeved on the rotary shaft 2 from the right side of the rotary shaft 2 at the third position (r), and is tightly pressed on the right magnetism isolating ring 10 through threaded connection with the inner circular surface of the shell 1, so that the position of the sealing part in the shell 1 is fixed.
The magnetic fluid sealing structure of the space station vapor compression distillation device provided by the embodiment also has the following advantages:
(1) the bearing is arranged in the mounting groove of the pole shoe, the space is saved, the magnetic field utilization rate of the permanent magnet is increased, the purpose of magnetic collection is achieved, and the sealing pressure resistance of the magnetic fluid can be greatly improved.
(2) The loss of the magnetic fluid during the loss of magnetism of the seal can be reduced, the stress concentration is reduced, the production and the processing are convenient, the magnetic field intensity of the seal position is increased, the sealing reliability of the pressure resistance of the magnetic fluid seal under the extreme environment of the space station is further improved, and the safe working range in the steam compression distillation device of the space station is expanded.
(3) The loss of the magnetic fluid when the seal fails is reduced as much as possible while the mounting and the dismounting are met, the secondary pressure bearing capacity and the self-repairing capacity of the sealing device are increased, the pressure resistance and the sealing reliability of the magnetic fluid seal under special conditions are further improved, and the safe working range of the sealing device is expanded.
The magnetic fluid sealing structure of the space station vapor compression distillation device provided by the embodiment is not only applied to the space station vapor compression distillation device, but also applied to sealing in engineering machinery.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is still within the scope of the present invention if they fall within the scope of the claims of the present invention and their equivalents.
Claims (12)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011179913.6A CN112303241A (en) | 2020-10-29 | 2020-10-29 | Magnetic fluid sealing structure of space station steam compression distillation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011179913.6A CN112303241A (en) | 2020-10-29 | 2020-10-29 | Magnetic fluid sealing structure of space station steam compression distillation device |
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| CN112303241A true CN112303241A (en) | 2021-02-02 |
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| CN202011179913.6A Pending CN112303241A (en) | 2020-10-29 | 2020-10-29 | Magnetic fluid sealing structure of space station steam compression distillation device |
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Cited By (1)
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| CN114046355A (en) * | 2021-11-26 | 2022-02-15 | 天津中德应用技术大学 | Hydrokinetic fluid sealing device |
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| CN114046355A (en) * | 2021-11-26 | 2022-02-15 | 天津中德应用技术大学 | Hydrokinetic fluid sealing device |
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