CN106499824B - A kind of reciprocating magnetic liquid self-circulation lubricating sealing device - Google Patents
A kind of reciprocating magnetic liquid self-circulation lubricating sealing device Download PDFInfo
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- CN106499824B CN106499824B CN201710012909.2A CN201710012909A CN106499824B CN 106499824 B CN106499824 B CN 106499824B CN 201710012909 A CN201710012909 A CN 201710012909A CN 106499824 B CN106499824 B CN 106499824B
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- piston
- cylinder
- pistons end
- ring
- annular magnet
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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
-
- 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
- F16N—LUBRICATING
- F16N15/00—Lubrication with substances other than oil or grease; Lubrication characterised by the use of particular lubricants in particular apparatus or conditions
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The present invention relates to a kind of reciprocating magnetic liquid self-circulation lubricating sealing devices, it is spindle including annular magnet, piston and cylinder etc., in the middle part of piston, middle part forms angle α with end junction, middle part is provided with annular groove, and O-ring seals and piston ring are equipped in annular groove；Annular magnet is placed on the outside of cylinder, is located at the midpoint of piston back-and-forth movement.Structure of the invention is compact, can meet the operating condition of high-voltage high-speed, can effectively reduce and prevent the leakage and loss of lubricant, improves the service life and sealing effect of piston ring；And to piston motion direction without particular/special requirement.
Description
Technical field
The invention belongs to reciprocating machinery fields, and in particular to a kind of reciprocating magnetic liquid self-circulation lubricating sealing
Device can be used for the reciprocating machines such as internal combustion engine, air-conditioning system, heavy-duty machinery bearing.
Background technology
The soliquid that magnetic liquid is made of nano magnetic particle, base load liquid and surfactant three parts is
Have magnetic and mobility functional fluid concurrently.Due to the peculiar property of magnetic liquid, magnetic liquid is widely used as in sealing
Agent and lubricant, these applications are largely to realize static sealing or rotatory sealing by magnetic liquid, are such as applied to true
Sky sealing and rotation motor etc.；Magnetic liquid is less applied to reciprocating mechanical structure, and most of magnetic fluid sealing
The self-loopa that structure can not achieve magnetic liquid utilizes.
Different structure and the reciprocating machine of size are widely used in industry and domestic appliance, and typical example has：It is interior
Reciprocal bearing in combustion engine, air-conditioning system and heavy-duty machinery.Traditional reciprocating machine reaches pumping chamber by piston ring
To sealing effect, and add grease series lubricant agent.It is mechanical for continuous back and forth movement, during the back and forth movement of piston, lubrication
Agent or sealant can be thrown off the zone of action under inertia force effect；If not being replenished in time, bleeding of lubricant may make device
It breaks down and brings security threat to staff.Enough lubricants are provided to ensure between reciprocal axis and its surrounding structure
It is always the technological difficulties that reciprocating machine faces not lose lubrication.
Invention content
The shortcomings that in order to overcome the prior art, present invention offer is a kind of to effectively reduce and prevent lubricant to be lost in and leak
Reciprocating magnetic liquid self-circulation lubricating sealing device.
The technical solution adopted by the present invention is as follows：
A kind of reciprocating magnetic liquid self-circulation lubricating sealing device, including piston shaft 1, magnetic liquid lubrication agent 3, annular
Magnet 5, piston 8 and cylinder 9；
Piston 8 includes 8a, II 8c of I 8b of pistons end and pistons end in the middle part of piston；8a is spindle in the middle part of piston, intermediate
Section diameter maximum is simultaneously cylindrical, and the ratio that interlude accounts for 8a overall lengths in the middle part of piston is more than 25%, is less than 100%, toward piston middle part
The both ends 8a diameter is gradually reduced；The both ends 8a are connect with I 8b of pistons end and II 8c of pistons end respectively in the middle part of piston, junction shape
90 ° of angulation α, α ＜；I 8b of pistons end is connect with piston shaft 1；
Piston 8 is placed in inside cylinder 9, is provided at least one annular groove 4 in the middle part of 8a in the middle part of piston, is set in annular groove 4
There are O-ring seals 7,7 housing ring plugging 6 of O-ring seals, piston ring 6 to be contacted with 9 inner wall of cylinder, magnetic liquid lubrication agent 3
Lubricant liquid film is formed between 9 inner wall of piston ring 6 and cylinder；Gap 2 is formed in the middle part of piston between the both ends 8a and 9 inner wall of cylinder；
I 8b of pistons end and II 8c of pistons end is smaller than 0.143mm with 9 inner wall of cylinder；
Annular magnet 5 is placed in 9 outside of cylinder and combines closely with its outer surface, and annular magnet 5 is located at 8 back and forth movement of piston
Midpoint, it is right that piston 8 remains that I 8b of pistons end and II 8c of pistons end are respectively at annular magnet 5 during the motion
Answer the both sides of position；Radially, magnetic blow out centre regional magnetic field intensity is more than 1.5kA/m to the magnetizing direction of annular magnet 5.
The quantity of annular magnet 5 is more than one；Annular magnet 5 is permanent magnet, can be one complete whole, also may be used
To be made of polylith magnet.
Operation principle of the present invention：
Below by taking piston moves horizontally in cylinder as an example, its operation principle is illustrated, but in practical applications,
To piston motion direction without particular/special requirement, it can be used for horizontal, vertical or any other direction.
Under the magneticaction that annular magnet 5 generates, magnetic liquid lubrication agent 3 can be adsorbed to annular magnet 5 and correspond to position
On 9 inner wall of cylinder set；Piston 8 moves reciprocatingly under the drive of piston shaft 1 in cylinder 9, and piston ring 6 is produced with 9 inner wall of cylinder
Raw mutually sliding, magnetic liquid lubrication agent 3 form lubricant liquid film between 9 inner wall of piston ring 6 and cylinder（It is also used as simultaneously close
Seal agent）.
When piston 8 is turned right from left end to be accelerated, a small amount of magnetic liquid lubrication agent 3 can be stagnant under inertia force effect
Afterwards in the movement of piston 8, the gap in 6 left side of piston ring is flowed to, remaining magnetic liquid lubrication agent 3 continues in piston ring 6 and cylinder 9
Lubricating liquid film is formed between inner wall, plays lubricating action；When piston 8 will do to the right retarded motion to piston ring 6 behind midpoint, used
Property force effect under a small amount of magnetic liquid lubrication agent 3 can flow to 6 right side gap of piston ring；As shown in Fig. 2, at this time as piston 8 connects
Terminal on the right side of nearly stroke, annular magnet 5 is located above the gap in 6 left side of piston ring, at this point, piston 8 accelerates from left to right
When be thrown off the magnetic liquid lubrication agent 3 of piston ring 6 and will be adsorbed to gas with 5 corresponding position of annular magnet under magneticaction
On 9 inner wall of cylinder；
Piston 8 starts the return movement done and first accelerate to slow down afterwards of turning left from the right side after moving to right side terminal, when piston ring 6 passes through
When crossing 5 underface of annular magnet, the magnetic liquid lubrication agent 3 taken away and be adsorbed in 5 corresponding position of annular magnet can be scraped, profit is continuously formed
Sliding film.As shown in figure 3, near piston motion to left side terminal, annular magnet 5 is located above the gap on 6 right side of piston ring, quilt
It gets rid of to magnetic liquid lubrication agent 3 herein and is adsorbed under magneticaction on 9 inner wall of cylinder of 5 corresponding position of annular magnet, waited for
When piston 8 moves across again, the magnetic liquid lubrication agent 3 that is adsorbed in herein will be scraped by piston ring 6 to be taken away, and lubrication is continuously formed
Liquid film.As described above, it can be achieved that the self-loopa of lubricant, effectively reduces and prevent the leakage and loss of lubricant.
Magnetic liquid lubrication agent 3 can be limited in gap 2 by 8a using spindle-type α-Fe2O3 in the middle part of piston, I 8b of pistons end
It is minimum with II 8c of pistons end and the gap of 9 inner wall of cylinder, it can effectively prevent the leakage of lubricant；Piston is provided with ring at 8 center
Connected in star 4, which is conducive to magnetic liquid lubrication agent 3 being limited near piston ring 6, reaches sealing effect.
Beneficial effects of the present invention：
1, the present invention utilizes magnetic liquid property, applies magnetic field by annular magnet, realizes in reciprocating machine and lubricate
The self-loopa of agent utilizes, and can effectively reduce and prevent lubricant leakage, improve the service life of piston ring；
2, sealing lubrication device of the invention can meet higher operating pressure and movement velocity；
3, lubricating system of the invention can be used for horizontal, vertical or any other to piston motion direction without particular/special requirement
Direction；
4, it is provided with annular groove among piston, is conducive to lubricant being limited near piston ring；
5, piston uses spindle-type α-Fe2O3, is conducive in the gap that lubricant is limited between piston and cylinder, into one
Step reduces the leakage of lubricant.
Description of the drawings
Fig. 1 is the structural schematic diagram of apparatus of the present invention；
Fig. 2 is the fundamental diagram that apparatus of the present invention piston 8 moves to terminal on the right side of stroke；
Fig. 3 is the fundamental diagram that apparatus of the present invention piston 8 moves to terminal on the left of stroke；
Fig. 4 is the apparatus structure schematic diagram described in embodiment 2；
Fig. 5 is apparatus structure schematic diagram described in embodiment 3；
Fig. 6 is the apparatus structure schematic diagram described in embodiment 4；
Fig. 7 is the apparatus structure schematic diagram described in embodiment 5；
Fig. 8 is the annular magnet structural schematic diagram that 6 described device of embodiment uses.
In figure：1- piston rods, the gaps 2-, 3- magnetic liquid lubrication agent, 4- annular grooves, 5- annular magnets, 6- piston rings,
7-O shape sealing rings, 8- pistons, 8a- pistons middle part, 8b- pistons ends I, 8c- pistons ends II, 9- cylinders.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and examples, but present disclosure be not limited to embodiment and
Shown in attached drawing.
Embodiment 1
As shown in Figure 1, a kind of reciprocating magnetic liquid self-circulation lubricating sealing device, including piston shaft 1, magnetic liquid profit
Lubrication prescription 3, annular magnet 5, piston 8 and cylinder 9；
Piston 8 includes 8a, II 8c of I 8b of pistons end and pistons end in the middle part of piston；8a is spindle in the middle part of piston, intermediate
Section diameter is maximum and cylindrical, and interlude accounts for 30% of 8a overall lengths in the middle part of piston, gradually subtracts toward the piston middle part both ends 8a diameter
It is small；The both ends 8a are connect with I 8b of pistons end and II 8c of pistons end respectively in the middle part of piston, and it is 70 ° that junction, which forms angle α,；Piston
I 8b of end is connect with piston shaft 1；
Piston 8 is placed in inside cylinder 9, and 9 internal diameter of cylinder is 16mm, opens that there are one 2.65 × 2.65mm in the middle part of piston in the middle part of 8a
Annular groove 4, the O-ring seals 7 for being 15 × 2.65 equipped with specification in annular groove 4,7 housing of O-ring seals loads onto piston
Ring 6, piston ring 6 are contacted with 9 inner wall of cylinder, and magnetic liquid lubrication agent 3 forms lubricant between 9 inner wall of piston ring 6 and cylinder
Liquid film；Gap 2 is formed in the middle part of piston between the both ends 8a and 9 inner wall of cylinder；In I 8b of pistons end and II 8c of pistons end and cylinder 9
The gap of wall is less than 0.143mm；Magnetic liquid lubrication agent 3 is the Oil-based magnetic liquid of 20mL models EFH1, saturated magnetization
Intensity is 11kA/m；
Annular magnet 5 is neodymium iron boron annular permanent magnet, and rectangular cross-section, magnetic blow out centre regional magnetic field intensity is more than 1.5kA/
M is placed in 9 outside of cylinder and combines closely with its outer surface, and annular magnet 5 is located at the midpoint of 8 back and forth movement of piston, 8 row of piston
Journey is 30mm, and piston 8 remains that I 8b of pistons end and II 8c of pistons end are respectively at annular magnet 5 during the motion
The both sides of corresponding position；The magnetizing direction of annular magnet 5 is radially.
Embodiment 2
With reference to the structure of embodiment 1, the present embodiment is with 1 difference of embodiment, and 5 section of annular magnet is 120 ° of apex angle
Isosceles triangle, magnetic field intensity is more than both sides in the middle part of magnet, 3 drop of magnetic liquid lubrication agent being scattered captured by magnet after from two
Side is adsorbed to center, as shown in Figure 4.
Embodiment 3
With reference to the structure of embodiment 1, the present embodiment is with 1 difference of embodiment, in the middle part of piston 8a and I 8b of pistons end and
The angle α of II junctions 8c of pistons end is 45 °, and I 8b of pistons end and II 8c of pistons end protrude to form point close to 2 side of gap
Angle, as shown in figure 5, the leakage of lubricant can more effectively be prevented by reducing angle [alpha].
Embodiment 4
With reference to the structure of embodiment 1, the present embodiment is with 1 difference of embodiment, opened among 8a in the middle part of piston there are three ring
Connected in star 4 is equipped with O-ring seals 7 and piston ring 6 in each annular groove 4, as shown in Figure 6.This structure, which is more advantageous to, to moisten
Lubrication prescription is limited near piston ring 6, and can further increase device bearing capacity and operation stability.
Embodiment 5
With reference to the structure of embodiment 1, the present embodiment is that piston is by multiple implementations in the present embodiment with 1 difference of embodiment
Piston 8 described in example 1 forms, each piston 8 corresponds to an annular magnet 5, forms multistage lubrication sealing as shown in Figure 7
Structure, can meet that piston stroke is longer, and sealed pressure is higher, the operating condition high to piston motion stability requirement.
Embodiment 6
With reference to the structure of embodiment 1, the present embodiment is with 1 difference of embodiment, and annular magnet 5 uses polylith（Even number）N、
S grades of opposite sector electromagnet alternative splicings form, as shown in figure 8, this magnet arrangement can generate higher on 9 internal face of cylinder
The magnetic field of gradient increases the magnetic volume power suffered by magnetic liquid.
Claims (8)
1. a kind of reciprocating magnetic liquid self-circulation lubricating sealing device, including piston shaft（1）, magnetic liquid lubrication agent（3）, ring
Shape magnet（5）, piston（8）And cylinder（9）；
Piston（8）Including in the middle part of piston（8a）, pistons end I（8b）With pistons end II（8c）；In the middle part of piston（8a）For spindle
Shape, interlude diameter is maximum and cylindrical, toward piston middle part（8a）Both ends diameter is gradually reduced；In the middle part of piston（8a）Both ends point
Not with pistons end I（8b）With pistons end II（8c）Connection, junction form angle α；Pistons end I（8b）With piston shaft（1）
Connection；
Piston（8）It is placed in cylinder（9）Inside, piston middle part（8a）Middle part is provided at least one annular groove（4）, annular groove
（4）It is interior to be equipped with O-ring seals（7）, O-ring seals（7）Housing ring plugging（6）, piston ring（6）With cylinder（9）Inner wall connects
It touches, magnetic liquid lubrication agent（3）In piston ring（6）With cylinder（9）Lubricant liquid film is formed between inner wall；In the middle part of piston（8a）Two
End and cylinder（9）Gap is formed between inner wall（2）；
Annular magnet（5）It is placed in cylinder（9）Outside is simultaneously combined closely with its outer surface, annular magnet（5）Positioned at piston（8）Back and forth
The midpoint of movement, piston（8）Pistons end I is remained during the motion（8b）With pistons end II（8c）It is respectively at ring
Shape magnet（5）The both sides of corresponding position.
2. the apparatus according to claim 1, which is characterized in that in the middle part of piston（8a）Cylindrical interlude accounts in piston
Portion（8a）The ratio of overall length is more than 25%, is less than 100%.
3. the apparatus according to claim 1, which is characterized in that in the middle part of piston（8a）Both ends respectively with pistons end I（8b）
With pistons end II（8c）90 ° of the angle α ＜ that junction is formed.
4. the apparatus according to claim 1, which is characterized in that pistons end I（8b）With pistons end II（8c）With cylinder
（9）Inner wall is smaller than 0.143mm.
5. the apparatus according to claim 1, which is characterized in that annular magnet（5）Magnetizing direction radially, center
Domain magnetic field intensity is more than 1.5kA/m.
6. the apparatus according to claim 1, which is characterized in that annular magnet（5）Quantity be more than one.
7. the apparatus according to claim 1, which is characterized in that annular magnet（5）For permanent magnet.
8. the apparatus according to claim 1, which is characterized in that annular magnet（5）For an entirety, or by polylith group of magnets
At.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710012909.2A CN106499824B (en) | 2017-01-09 | 2017-01-09 | A kind of reciprocating magnetic liquid self-circulation lubricating sealing device |
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|---|---|---|---|
| CN201710012909.2A CN106499824B (en) | 2017-01-09 | 2017-01-09 | A kind of reciprocating magnetic liquid self-circulation lubricating sealing device |
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| CN106499824A CN106499824A (en) | 2017-03-15 |
| CN106499824B true CN106499824B (en) | 2018-08-10 |
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| CN110906147B (en) * | 2019-12-04 | 2021-05-14 | 绍兴京越智能科技有限公司 | Riveting machine maintenance equipment by utilizing friction force change |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1319722A (en) * | 2001-01-03 | 2001-10-31 | 彭德恩 | Internal combustion engine cylinder and piston magnetofluid seal structure |
| CA2607700A1 (en) * | 2006-11-03 | 2008-05-03 | General Electric Company | Mechanical sealing system and method for rotary machines |
| CN101776150B (en) * | 2010-03-08 | 2013-05-08 | 北京交通大学 | Combined reciprocating sealing device of magnetic liquid, C-shaped slip ring and Y x type seal ring |
| CN203670800U (en) * | 2014-01-17 | 2014-06-25 | 北京交通大学 | Magnetic liquid sealing device for sealing liquid |
| CN104006162A (en) * | 2014-06-03 | 2014-08-27 | 徐州牛头山铸业有限公司 | Sealing system for reciprocating moving rod piece |
| CN104196949B (en) * | 2014-09-17 | 2016-02-17 | 河北工业大学 | A kind of vibration damper based on magnetic fluid |
| CN105351738B (en) * | 2015-11-30 | 2017-09-01 | 中冶南方工程技术有限公司 | A kind of device for sealing magnetic fluid of gas chamber |
| CN105570468A (en) * | 2016-03-02 | 2016-05-11 | 广西科技大学 | Symmetrical magnetic fluid sealing device |
| CN205743807U (en) * | 2016-05-30 | 2016-11-30 | 邓海波 | Magnetic supercharging polished rod sealer |
| CN206513836U (en) * | 2017-01-09 | 2017-09-22 | 昆明理工大学 | A kind of reciprocating magnetic liquid self-circulation lubricating sealing device |
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